As filed with the Securities and Exchange Commission on April 4, 2006.

                                                     Registration No. 333-_____


                UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM S-3

             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                          ABRAXAS PETROLEUM CORPORATION
             (Exact Name of Registrant as Specified in its Charter)

               For Co-Registrants, see "Table of Co-Registrants."

                                                      Robert L. G. Watson
                                           President and Chief Executive Officer
                                                 Abraxas Petroleum Corporation
   500 North Loop 1604 East, Suite 100       500 North Loop 1604 East, Suite 100
           San Antonio, Texas 78232               San Antonio, Texas 78232
                (210) 490-4788                         (210) 490-4788
 (Address, including zip code,               (Name, address, including zip code,
 and telephone number, including area code,         and telephone number,
 of registrants' principal executive offices)        including area code,
                                                    of agent for service)

                                   Copies to:

                                Steven R. Jacobs
                              Jackson Walker L.L.P.
                         112 E. Pecan Street, Suite 2100
                            San Antonio, Texas 78205
                                 (210) 978-7700

Approximate date of commencement of proposed sale to the public: From time to
time after this Registration Statement becomes effective.

     If the only  securities  being  registered  on this form are being  offered
pursuant to dividend or interest  reinvestment plans, please check the following
box:[ ]

     If any of the securities being registered on this form are to be offered on
a delayed or continuous  basis  pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, please check the following box:[X]

     If this form is filed to  register  additional  securities  for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering:[ ]

     If this form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under the  Securities  Act,  check the following box and list the Securities Act
registration  statement number of the earlier effective  registration  statement
for the same offering:[ ]

     If this form is a registration  statement  pursuant to General  Instruction
I.D. or a  post-effective  amendment  thereto that shall become  effective  upon
filing with the  Commission  pursuant to Rule 462(e) under the  Securities  Act,
check the following box:[ ]



     If this form is a  post-effective  amendment  to a  registration  statement
filed  pursuant  to  General  Instruction  I.D.  filed  to  register  additional
securities or additional classes of securities pursuant to Rule 413(b) under the
Securities Act, check the following box:[ ]

                                   ----------



                            ------------------------


                       CALCULATION OF REGISTRATION FEE(1)




 Title of Each Class                             Proposed Maximum       Proposed Maximum
 of Securities to be         Amount to be         Offering Price       Aggregate Offering        Amount of
      Registered              Registered           per Unit (1)            Price (1)           Registration
                                                                                                    Fee
----------------------     ----------------    -------------------    -------------------    ----------------


                                                                                     
Debt Securities (2)

Common Stock, par
value $.01 per share
(3)

Preferred Stock, par
value $.01 per share
(3)(4)(5)(6)

Depositary Shares (5)

Warrants (6)

Guarantees (7)

Units
(2)(3)(4)(5)(6)(7)


Total                         $150,000,000(1)          100%            $150,000,000(1)         $16,050


(1)  Estimated  solely  for the  purpose of  calculating  the  registration  fee
pursuant to Rule 457(o).  In no event will the aggregate  initial offering price
of all  securities  issued  from  time to  time  pursuant  to this  registration
statement exceed $[150,000,000]. Any securities registered hereunder may be sold
separately or as units with other securities registered hereunder.  The proposed
maximum  offering  price  per  unit  will  be  determined  from  time to time in
connection with the issuance of the securities registered hereunder.

(2) There are being registered  hereunder an  indeterminate  principal amount of
debt  securities  that may be sold from time to time. If any debt securities are
being issued at an original issue discount,  then the offering price shall be in
such greater  principal amount as shall result in an aggregate  initial offering
price not to exceed  $[150,000,000],  less the dollar  amount of any  securities
previously issued hereunder.

(3) There are being registered  hereunder an  indeterminate  number of shares of
common stock that may be sold from time to time. There are also being registered
hereunder an indeterminate number of shares of common stock as shall be issuable
upon conversion or redemption of preferred  stock or debt securities  registered
hereby.

(4) There are being registered  hereunder an  indeterminate  number of shares of
preferred stock as may be sold from time to time by Abraxas.

(5) There are being registered  hereunder an indeterminate  number of depositary
shares to be  evidenced  by  depositary  receipts  issued  pursuant to a deposit
agreement.  In the  event  Abraxas  elects  to  offer to the  public  fractional
interests in shares of preferred stock registered hereunder, depositary receipts
will be distributed to those persons purchasing such fractional  interests,  and
the shares of preferred stock will be issued to the depositary under the deposit
agreement.

(6) There are being registered  hereunder an indeterminate  amount and number of
warrants,  representing rights to purchase preferred stock, common stock or debt
securities  registered  hereby or equity  securities  issued by an  unaffiliated
corporation or other entity and held by one or more of the registrants.

(7) Guarantees may be provided by  subsidiaries of Abraxas of the payment of the
principal and interest on the debt securities.  No additional consideration will
be received for the guarantees and,  pursuant to Rule 457(n),  no additional fee
is required.



The registrants  hereby amend this registration  statement on such date or dates
as may be necessary to delay its effective date until the registrants shall file
a further amendment which specifically  states that this registration  statement
shall  thereafter  become  effective  in  accordance  with  Section  8(a) of the
Securities  Act of  1933  or  until  the  registration  statement  shall  become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.






                             TABLE OF CO-REGISTRANTS

     Each of the  following  subsidiaries  and any other  subsidiary  of Abraxas
Petroleum  Corporation  that  becomes a guarantor  of certain of the  securities
registered hereby, is hereby deemed to be a registrant.




                                                Jurisdiction of         I.R.S. Employer
 Exact Name as Specified in their Charters     Incorporation or      Identification Number
                                                 Organization
-------------------------------------------  ---------------------  --------------------------

                                                                     
Eastside Coal Company, Inc.                        Colorado                74-227540

Sandia Oil & Gas Corporation                         Texas                 74-236896

Sandia Operating Corp.                               Texas                 74-246870

Wamsutter Holdings, Inc.                            Wyoming                74-289701

Western Associated Energy Corporation                Texas                 74-193787


     The address and  telephone  number of the  principal  executive  offices of
Eastside Coal Company, Inc. is 500 North Loop 1604 East, Suite 100, San Antonio,
TX 78232,  (210)  490-4788  and the agent for service at such  address is Robert
L.G. Watson. The address and telephone number of the principal executive offices
of Sandia Oil & Gas  Corporation  and Sandia  Operating  Corp. is 500 North Loop
1604 East,  Suite 100, San Antonio,  TX 78232,  (210) 490-4788 and the agent for
service at such address is Robert L.G. Watson.  The address and telephone number
of the principal executive offices of Wamsutter Holdings, Inc. is 500 North Loop
1604 East,  Suite 100, San Antonio,  TX 78232,  (210) 490-4788 and the agent for
service at such address is Robert L.G. Watson.  The address and telephone number
of the principal  executive offices of Western  Associated Energy Corporation is
500 North Loop 1604 East, Suite 100, San Antonio,  TX 78232,  (210) 490-4788 and
the agent for service at such address is Robert L.G. Watson.










THE  INFORMATION IN THIS  PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED.  WE MAY
NOT SELL  THESE  SECURITIES  UNTIL THE  REGISTRATION  STATEMENT  FILED  WITH THE
SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PROSPECTUS IS NOT AN OFFER
TO  SELL  THESE  SECURITIES  AND IT IS NOT  SOLICITING  AN  OFFER  TO BUY  THESE
SECURITIES IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.

                    SUBJECT TO COMPLETION DATED APRIL 4, 2006

                          ABRAXAS PETROLEUM CORPORATION


                                  $150,000,000
             ------------------------------------------------------
                                 Debt Securities
                                  Common Stock
                                 Preferred Stock
                                Depositary Shares
                                    Warrants
                                   Guarantees
                                      Units
             ------------------------------------------------------




     We may offer, from time to time, in one or more series:

         o  unsecured senior debt securities;

         o  secured senior debt securities;

         o  unsecured subordinated debt securities;

         o  secured subordinated debt securities;

         o  shares of common stock;

         o  shares of preferred stock;

         o  shares of  preferred  stock that may be  represented  by  depositary
            shares;

         o  warrants to purchase debt securities,  common stock, preferred stock
            or other securities; and

         o  units  to  purchase  one or  more  debt  securities,  common  stock,
            preferred stock, depositary shares or warrants or any combination of
            such securities.


     The securities:

         o  will have a maximum aggregate offering price of $150,000,000;

         o  will be  offered  at  prices  and on  terms  to be set  forth  in an
            accompanying prospectus supplement;

         o  may be offered separately or together, or in separate series;

         o  may be convertible into or exchangeable for other securities;

         o  may be guaranteed by certain of our subsidiaries; and

         o  may be listed on a national securities association,  if specified in
            an accompanying prospectus supplement.


     Our common stock is listed on The American  Stock Exchange under the symbol
"ABP."


     We will provide the specific terms of the securities in supplements to this
prospectus.  This prospectus may be used to offer and sell securities only if it
is accompanied by a prospectus supplement.



     YOU SHOULD READ THIS  PROSPECTUS  AND ANY PROSPECTUS  SUPPLEMENT  CAREFULLY
BEFORE YOU  INVEST,  INCLUDING  THE RISK  FACTORS  WHICH BEGIN ON PAGE 2 OF THIS
PROSPECTUS.


     NEITHER THE  SECURITIES AND EXCHANGE  COMMISSION  NOR ANY STATE  SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED IF THIS
PROSPECTUS  IS TRUTHFUL OR  COMPLETE.  ANY  REPRESENTATION  TO THE CONTRARY IS A
CRIMINAL OFFENSE.


                  This prospectus is dated _____________, 2006





                                TABLE OF CONTENTS


ABOUT THIS PROSPECTUS.........................................................ii
WHERE YOU CAN FIND MORE INFORMATION...........................................ii
INCORPORATION BY REFERENCE....................................................ii
FORWARD-LOOKING INFORMATION...................................................iv
ABOUT ABRAXAS..................................................................1
RISK FACTORS...................................................................2
USE OF PROCEEDS...............................................................10
DILUTION......................................................................10
RATIO OF EARNINGS TO FIXED CHARGES............................................10
DESCRIPTION OF DEBT SECURITIES................................................10
DESCRIPTION OF CAPITAL STOCK..................................................17
DESCRIPTION OF WARRANTS.......................................................21
DESCRIPTION OF UNITS..........................................................22
PLAN OF DISTRIBUTION..........................................................22
LEGAL MATTERS.................................................................24
EXPERTS.......................................................................24
INDEX OF FINANCIAL STATEMENTS................................................F-1







                              ABOUT THIS PROSPECTUS


     This prospectus is part of a registration  statement that we filed with the
Securities and Exchange  Commission  utilizing a "shelf"  registration  process.
Under  this  shelf  process,  we may  sell  different  types  of the  securities
described in this  prospectus  in one or more  offerings up to a total  offering
amount of $[150,000,000].


     This prospectus  provides you with a general  description of the securities
we may  offer.  Each  time we sell  securities,  we will  provide  a  prospectus
supplement  that  will  contain  specific  information  about  the terms of that
offering  and the  securities  offered by us in that  offering.  The  prospectus
supplement  may  also  add,  update  or  change  information  contained  in this
prospectus.  You should read both this prospectus and any prospectus  supplement
together with additional  information described under the heading "Where You Can
Find More Information."


                       WHERE YOU CAN FIND MORE INFORMATION


     Our SEC filings are  available to the public over the Internet at the SEC's
web site at www.sec.gov.  You may also read and copy any document we file at the
SEC's public  reference  rooms located at 100 F Street,  N.E.,  Washington  D.C.
20549.  Please call the SEC at  1-800-SEC-0330  for further  information  on the
public  reference  rooms and  their  copy  charges.  Also,  using  our  website,
www.abraxaspetroleum.com,  you can access electronic copies of documents we file
with the SEC,  including our annual reports on Form 10-K,  quarterly  reports on
Form 10-Q, and current  reports on Form 8-K and any amendments to those reports.
Information on our website is not  incorporated by reference in this prospectus.
Access to those  electronic  filings is  available  as soon as  practical  after
filing with the SEC.  You may also  request a copy of those  filings,  excluding
exhibits, at no cost by writing, emailing or telephoning our principal executive
office, which is:

                       500 North Loop 1604 East, Suite 100
                            San Antonio, Texas 78232
                              Attn: Chris Williford
                                 (210) 490-4788


                           INCORPORATION BY REFERENCE


     The following  documents we filed with the SEC pursuant to the Exchange Act
are incorporated herein by reference:

         o  our Annual  Report on Form 10-K for the fiscal  year ended  December
            31, 2005, filed with the Commission on March 23, 2006;

         o  our Current  Report on Form 8-K filed with the Commission on January
            11, 2006;

         o  our Current  Report on Form 8-K filed with the Commission on January
            27, 2006;

         o  our Current Report on Form 8-K filed with the Commission on February
            8, 2006;

         o  our Current Report on Form 8-K filed with the Commission on February
            28, 2006;

         o  our Current Report on Form 8-K filed with the Commission on March 6,
            2006;

         o  our  Notification  on Form 12b-25 filed with the Commission on March
            16, 2006;

         o  our Current  Report on Form 8-K filed with the  Commission  on March
            17, 2006;

         o  our Current  Report on Form 8-K filed with the  Commission  on March
            22, 2006;

         o  our Quarterly Report on Form 10-Q/A (for the quarter ended March 31,
            2005) filed with the Commission on March 30, 2006;

         o  our Quarterly  Report on Form 10-Q/A (for the quarter ended June 30,
            2005) filed with the Commission on March 30, 2006;

                                       ii


         o  our Quarterly Report on Form 10-Q/A (for the quarter ended September
            30, 2005) filed with the Commission on March 30, 2006; and

         o  the  description of our common stock  contained in our  Registration
            Statement on Form 8-A, filed with the Commission on August 17, 2000,
            including  any  amendments  or  reports  filed  for the  purpose  of
            updating such description.

     Notwithstanding  the foregoing,  information that we elect to furnish,  but
not file, or have  furnished,  but not filed,  with the Commission in accordance
with Commission rules and regulations is not incorporated into this Registration
Statement and does not constitute a part hereof.

     All documents filed by us pursuant to Sections 13(a), 13(c), 14 or 15(d) of
the Exchange Act (excluding any  information  that we elect to furnish,  but not
file,  or furnish,  but do not file,  with the  Commission  in  accordance  with
Commission  rules and  regulations)  subsequent  to the date of this  filing and
prior to the  termination of this offering shall be deemed to be incorporated in
this  prospectus  and to be a part  hereof  from the date of the  filing of such
document. Any statement contained in a document incorporated by reference herein
shall be deemed to be modified or superseded for all purposes to the extent that
a statement  contained in this prospectus,  or in any other  subsequently  filed
document which is also  incorporated  or deemed to be incorporated by reference,
modifies or supersedes such  statement.  Any statement so modified or superseded
shall not be deemed,  except as so modified or superseded,  to constitute a part
of this prospectus.

     Upon written or oral request, we will provide to each person, including any
beneficial owner, to whom a prospectus is delivered, a copy of any or all of the
information  that has been  incorporated  by reference in the prospectus but not
delivered with the prospectus. Inquiries should be directed to:

                       500 North Loop 1604 East, Suite 100
                            San Antonio, Texas 78232
                              Attn: Chris Williford
                                 (210) 490-4788


                                      iii



                           FORWARD-LOOKING INFORMATION

     We make  forward-looking  statements  throughout  this  prospectus  and the
documents included or incorporated by reference in this prospectus. Whenever you
read a statement  that is not simply a  statement  of  historical  fact (such as
statements  including words like "believe,"  "expect,"  "anticipate,"  "intend,"
"plan," "seek," "estimate," "could," "potentially" or similar expressions),  you
must  remember  that  these  are  forward-looking   statements,   and  that  our
expectations may not be correct, even though we believe they are reasonable. The
forward-looking  information  contained in this  prospectus  or in the documents
included or incorporated by reference in this prospectus is generally located in
the material  set forth under the  headings  "About  Abraxas,"  "Risk  Factors,"
"Business," and "Management's Discussion and Analysis of Financial Condition and
Results  of  Operations"  but may be  found in other  locations  as well.  These
forward-looking  statements  generally  relate to our plans and  objectives  for
future  operations and are based upon our management's  reasonable  estimates of
future results or trends. The factors that may affect our expectations regarding
our operations include, among others, the following:

         o  our high debt level;

         o  our success in development, exploitation and exploration activities;

         o  our ability to make planned capital expenditures;

         o  declines in our production of natural gas and crude oil;

         o  prices for natural gas and crude oil;

         o  our   ability  to  raise   equity   capital   or  incur   additional
            indebtedness;

         o  political  and  economic  conditions  in  oil  producing  countries,
            especially those in the Middle East;

         o  price and availability of alternative fuels;

         o  our restrictive debt covenants;

         o  our acquisition and divestiture activities;

         o  results of our hedging activities; and

         o  other  factors  discussed  elsewhere  in  this  prospectus  and  the
            documents incorporated by reference in this offering memorandum.

                                       iv

                                  ABOUT ABRAXAS


     Abraxas  Petroleum  Corporation  is an independent  energy company  engaged
primarily  in the  acquisition,  development,  exploitation  and  production  of
natural gas and crude oil.  Our  principal  means of growth has been through the
acquisition and subsequent development and exploitation of producing properties.
Our core  areas of  operation  are in south  and  west  Texas  and east  central
Wyoming.  Our  current  producing  properties  are  typically  characterized  by
long-lived reserves,  established production profiles and an emphasis on natural
gas. As a result of our historical  acquisition  activities,  we believe that we
have  a  substantial   inventory  of  low  risk   exploitation  and  development
opportunities, the successful completion of which is critical to the maintenance
and growth of our current  production  levels.  When we use the terms "Abraxas,"
"we," "us,"  "our," or the  "Company,"  we are  referring  to Abraxas  Petroleum
Corporation,  together with its  consolidated  subsidiaries,  unless the context
otherwise requires.


     Abraxas was originally incorporated in Texas in 1977 and re-incorporated in
Nevada in 1990 when it became a public  company.  Our common  stock is listed on
The American Stock  Exchange  under the symbol "ABP." Our principal  offices are
located at 500 North Loop 1604 East,  Suite 100, San Antonio,  Texas 78232,  and
our telephone  number is (210) 490-4788.  Information  contained on our website,
www.abraxaspetroleum.com, is not part of this prospectus.



                                       1

                                  RISK FACTORS

Risks Related to Our Business


     We have a highly leveraged  capital  structure,  which limits our operating
and financial flexibility.


     We have a highly  leveraged  capital  structure.  At March 27, 2006, we had
total  indebtedness,  including our floating rate senior secured notes due 2009,
or notes,  which we issued in connection with our October 2004  refinancing,  of
approximately $130.8 million, all of which is secured indebtedness.  We also had
availability  of $9.2 million under our $15.0 million senior  secured  revolving
credit facility, all of which is also secured indebtedness.


     Our highly leveraged  capital structure will have several important effects
on our future operations, including:

         o  a  substantial  amount  of our cash  flow  from  operations  will be
            required  to service our  indebtedness,  which will reduce the funds
            that  would   otherwise  be  available   for   operations,   capital
            expenditures and expansion  opportunities,  including developing our
            properties;

         o  the covenants  contained in our revolving credit facility require us
            to meet  certain  financial  tests and  comply  with  certain  other
            restrictions,  including limitations on capital expenditures.  These
            restrictions,  together  with those in the  indenture  governing the
            notes,  may limit our ability to undertake  certain  activities  and
            respond to changes in our business and our industry;

         o  our debt level may impair our ability to obtain additional  capital,
            through equity  offerings or debt  financings,  for working capital,
            capital expenditures, or refinancing of indebtedness;

         o  our debt level makes us more  vulnerable  to economic  downturns and
            adverse developments in our industry (especially declines in natural
            gas and crude oil prices) and the economy in general; and

         o  the notes and our revolving  credit facility are subject to variable
            interest rates which makes us vulnerable to interest rate increases.


     We may not be able to fund the substantial  capital  expenditures that will
be required for us to increase our reserves and our production.


     We are required to make  substantial  capital  expenditures  to develop our
existing reserves and to discover new reserves.  Historically,  we have financed
our capital  expenditures  primarily with cash flow from operations,  borrowings
under  credit  facilities,  sales of  producing  properties  and sales of equity
securities, and we expect to continue to do so in the future; however, we cannot
assure  you that we will have  sufficient  capital  resources  in the  future to
finance our capital expenditures.


     Volatility in natural gas and crude oil prices,  the timing of our drilling
program and our  drilling  results  will  affect our cash flow from  operations.
Lower prices and/or lower production will also decrease  revenues and cash flow,
thus  reducing the amount of financial  resources  available to meet our capital
requirements,  including  reducing  the amount  available to pursue our drilling
opportunities. If our cash flow from operations does not increase as a result of
our planned  capital  expenditures,  a greater  percentage of our cash flow from
operations   will  be  required  for  debt  service  and  our  planned   capital
expenditures would, by necessity, be decreased.


     The borrowing base under our revolving  credit  facility will be determined
from time to time by our lenders,  consistent with their  customary  natural gas
and crude oil lending practices.  Reductions in estimates of our natural gas and
crude oil  reserves  could result in a reduction in our  borrowing  base,  which
would reduce the amount of financial  resources  available  under our  revolving
credit facility to meet our capital requirements.  Such a reduction could be the
result  of  lower  commodity  prices  or  production,   inability  to  drill  or
unfavorable  drilling  results,  changes  in natural  gas and crude oil  reserve


                                       2


engineering,  the lenders'  inability to agree to an adequate  borrowing base or
adverse changes in the lenders' practices regarding estimation of reserves.


     If cash flow from operations or our borrowing base decrease for any reason,
our  ability to  undertake  exploitation  and  development  activities  could be
adversely  affected.  As a result,  our  ability  to replace  production  may be
limited. In addition,  if the borrowing base under our revolving credit facility
is reduced,  we would be required to reduce our  borrowings  under our revolving
credit  facility so that such  borrowings do not exceed the borrowing base. This
could further  reduce the cash  available to us for capital  spending and, if we
did not have sufficient capital to reduce our borrowing level, could cause us to
default under our revolving credit facility and the notes.


     We have sold producing  properties to provide us with liquidity and capital
resources in the past and may do so in the future. After any such sale, we would
expect to utilize  the  proceeds  to drill new wells.  If we cannot  replace the
production lost from  properties  sold with production from new properties,  our
cash flow from operations  will likely  decrease which, in turn,  would decrease
the amount of cash available for debt service and additional capital spending.


     We may be unable to acquire or develop additional  reserves,  in which case
our results of operations and financial condition would be adversely affected.


     Our future natural gas and crude oil production, and therefore our success,
is highly  dependent  upon our ability to find,  acquire and develop  additional
reserves that are profitable to produce. The rate of production from our natural
gas and crude  oil  properties  and our  proved  reserves  will  decline  as our
reserves are produced unless we acquire additional  properties containing proved
reserves, conduct successful development and exploitation activities or, through
engineering studies, identify additional behind-pipe zones or secondary recovery
reserves.   We  cannot  assure  you  that  our  exploration,   exploitation  and
development  activities will result in increases in our proved reserves.  As our
proved reserves,  and consequently our production,  decline,  our cash flow from
operations and the amount that we are able to borrow under our revolving  credit
facility  will  also  decline.  In  addition,  approximately  52% of  our  total
estimated  proved  reserves at  December  31,  2005 were  undeveloped.  By their
nature,  estimates of  undeveloped  reserves are less certain.  Recovery of such
reserves will require significant  capital  expenditures and successful drilling
operations.


     Our production is currently concentrated in one well.


     Approximately  30% of our current  production is from a single well in west
Texas. If production  from this well decreases,  it would have a material impact
on our revenues, cash flow from operations and financial condition. This well is
subject  to all of the  risks  typically  associated  with  natural  gas  wells,
including the risks described in "Risks Related to Our Industry - Our operations
are  subject to the  numerous  risks of natural gas and crude oil  drilling  and
production activities."


     We may not find  any  commercially  productive  natural  gas or  crude  oil
reservoirs.


     We cannot assure you that the new wells we drill will be productive or that
we will  recover  all or any  portion of our capital  investment.  Drilling  for
natural  gas and crude  oil may be  unprofitable.  Dry holes and wells  that are
productive but do not produce sufficient net revenues after drilling,  operating
and other costs are unprofitable.  The inherent risk of not finding commercially
productive  reservoirs  will be  compounded  by the fact  that 52% of our  total
estimated  proved  reserves at  December  31,  2005 were  undeveloped.  By their
nature,  estimates of  undeveloped  reserves are less certain.  Recovery of such
reserves will require significant  capital  expenditures and successful drilling
operations.  In addition,  our  properties  may be  susceptible to drainage from
production by other operations on adjacent properties.  If the volume of natural
gas and crude oil we  produce  decreases,  our cash  flow from  operations  will
decrease.


     Restrictive  debt  covenants  could  limit our  growth  and our  ability to
finance our operations,  fund our capital needs,  respond to changing conditions
and engage in other business activities that may be in our best interest.


     Our revolving credit facility and the indenture governing the notes contain
a number of significant  covenants that,  among other things,  limit our ability
to:

                                       3


         o  incur or guarantee  additional  indebtedness and issue certain types
            of preferred stock or redeemable stock;

         o  transfer or sell assets;

         o  create liens on assets;

         o  pay dividends or make other  distributions  on capital stock or make
            other  restricted  payments,  including  repurchasing,  redeeming or
            retiring  capital  stock  or  subordinated  debt or  making  certain
            investments or acquisitions;

         o  engage in transactions with affiliates;

         o  guarantee other indebtedness;

         o  make any change in the principal nature of our business;

         o  prepay,  redeem,  purchase  or  otherwise  acquire any of our or our
            restricted subsidiaries' indebtedness;

         o  permit a change of control;

         o  directly or indirectly make or acquire any investment;

         o  cause a restricted  subsidiary  to issue or sell our capital  stock;
            and

         o  consolidate,  merge  or  transfer  all or  substantially  all of the
            consolidated assets of Abraxas and our restricted subsidiaries.


     In  addition,  our  revolving  credit  facility  requires  us  to  maintain
compliance  with  specified  financial  ratios  and  satisfy  certain  financial
condition tests. Our ability to comply with these ratios and financial condition
tests may be affected by events  beyond our  control,  and we cannot  assure you
that we will meet these ratios and financial  condition  tests.  These financial
ratio  restrictions  and  financial  condition  tests could limit our ability to
obtain future financings,  make needed capital expenditures,  withstand a future
downturn  in our  business  or the  economy  in  general  or  otherwise  conduct
necessary or desirable corporate activities.


     A breach of any of these  covenants  or our  inability  to comply  with the
required financial ratios or financial condition tests could result in a default
under our revolving  credit  facility and the notes. A default,  if not cured or
waived, could result in all of our indebtedness,  including the notes,  becoming
immediately due and payable. If that should occur, we may not be able to pay all
such debt or to borrow  sufficient  funds to refinance it. Even if new financing
were then available, it may not be on terms that are acceptable to us.


     The marketability of our production  depends largely upon the availability,
proximity  and  capacity  of  natural  gas  gathering  systems,   pipelines  and
processing facilities.


     The  marketability  of our production  depends in part upon  processing and
transportation  facilities.  Transportation  space on such gathering systems and
pipelines is  occasionally  limited and at times  unavailable  due to repairs or
improvements  being made to such  facilities or due to such space being utilized
by other  companies  with  priority  transportation  agreements.  Our  access to
transportation options can also be affected by U.S. Federal and state regulation
of natural gas and crude oil production  and  transportation,  general  economic
conditions and changes in supply and demand.  These factors and the availability
of markets are beyond our control.  If market factors  dramatically  change, the
financial  impact on us could be substantial and adversely affect our ability to
produce and market natural gas and crude oil.


     Hedging  transactions  have in the  past  impacted,  and may in the  future
impact, our cash flow from operations.


     We enter into hedging arrangements from time to time to reduce our exposure
to  fluctuations  in  natural  gas and  crude oil  prices  and to  achieve  more
predictable  cash flow. In 2003 and 2005, we incurred  hedging costs of $842,000
and $592,000, respectively,  resulting from the price floors we established. For
the year ended  December 31, 2004, we recognized a gain from hedging  activities
of approximately $118,000. Currently, we believe our hedging arrangements, which


                                       4


are in the form of price floors, do not expose us to significant financial risk.


     We cannot assure you that the hedging transactions we have entered into, or
will  enter  into,  will  adequately  protect  us  from  financial  loss  due to
circumstances such as:

         o  highly volatile natural gas and crude oil prices;

         o  our production being less than expected; or

         o  a counterparty to one of our hedging transactions  defaulting on our
            contractual obligations.


     We have experienced significant operating losses in the past.


     We  recorded  net  losses  from  continuing  operations  for  2003 of $12.8
million. We recorded net income from continuing  operations for 2004 and 2005 of
$3.0  million  and  $6.3  million,  respectively.  Net  income  from  continuing
operations  in 2004  included  $12.6  million  of  gain  on debt  extinguishment
relating  to our October  2004  refinancing  and a deferred  tax benefit of $6.1
million.  We cannot  assure you that we will  continue to be  profitable  in the
future.


     Lower  natural  gas and  crude  oil  prices  increase  the risk of  ceiling
limitation write-downs.


     We use the full cost  method to account  for our  natural gas and crude oil
operations.  Accordingly,  we  capitalize  the cost to acquire,  explore for and
develop natural gas and crude oil properties.  Under full cost accounting rules,
the net capitalized  cost of natural gas and crude oil properties may not exceed
a "ceiling limit" which is based upon the present value of estimated  future net
cash flows from proved reserves,  discounted at 10%. If net capitalized costs of
natural gas and crude oil properties  exceed the ceiling  limit,  we must charge
the  amount of the  excess to  earnings.  This is called a  "ceiling  limitation
write-down."  This charge does not impact cash flow from  operating  activities,
but does reduce our stockholders' equity and earnings.  The risk that we will be
required  to  write-down  the  carrying  value  of  natural  gas and  crude  oil
properties increases when natural gas and crude oil prices are low. In addition,
write-downs may occur if we experience  substantial  downward adjustments to our
estimated proved reserves. An expense recorded in one period may not be reversed
in a subsequent  period even though higher  natural gas and crude oil prices may
have increased the ceiling applicable to the subsequent period.


     We have  incurred  ceiling  limitation  write-downs  in the past. We cannot
assure you that we will not experience additional ceiling limitation write-downs
in the future.


     Use of our net operating loss carryforwards may be limited.


     At December 31, 2005, we had,  subject to the limitation  discussed  below,
$190.0 million of net operating loss carryforwards for U.S. tax purposes.  These
loss carryforwards will expire through 2025 if not utilized.  In addition, as to
a portion  of the U.S.  net  operating  loss  carryforwards,  the amount of such
carryforwards  that we can use annually is limited under U.S. tax law. Moreover,
uncertainties  exist  as  to  the  future  utilization  of  the  operating  loss
carryforwards  under the  criteria  set forth  under  FASB  Statement  No.  109.
Therefore,  we have established a valuation allowance of $73.0 million and $67.0
million for deferred tax assets at December 31, 2004 and 2005, respectively.


     We depend on our  Chairman,  President and CEO and the loss of his services
could have an adverse effect on our operations.


     We depend to a large  extent on Robert L. G.  Watson,  our  Chairman of the
Board,  President and Chief Executive  Officer,  for our management and business
and financial contacts.  Mr. Watson may terminate his employment  agreement with
us at any time on 30 days notice,  but, if he terminates without cause, he would
not be  entitled  to the  severance  benefits  provided  under the terms of that
agreement.  Mr. Watson is not precluded from working for, with or on behalf of a
competitor  upon  termination of his  employment  with us. If Mr. Watson were no
longer able or willing to act as our  Chairman,  the loss of his services  could
have an adverse effect on our  operations.  In addition,  in connection with the
initial public  offering by our previously  wholly-owned  subsidiary,  Grey Wolf
Exploration  Inc.,  we, Grey Wolf and Mr.  Watson  agreed that Mr.  Watson would
continue to serve as our Chief Executive  Officer and President and as the Chief
Executive Officer for Grey Wolf, with Mr. Watson devoting two-thirds of his time


                                       5


to his  positions  and duties with us and  one-third of his time to his position
and duties with Grey Wolf. In consideration for receiving Mr. Watson's services,
Grey Wolf  makes an annual  payment  to Abraxas  of  US$100,000  and  reimburses
Abraxas for Mr.  Watson's  expenses  incurred in connection  with providing such
services.


Risks Related to Our Industry


     Market   conditions  for  natural  gas  and  crude  oil,  and  particularly
volatility of prices for natural gas and crude oil, could  adversely  affect our
revenue, cash flows, profitability and growth.


     Our revenue,  cash flows,  profitability  and future rate of growth  depend
substantially  upon prevailing prices for natural gas and crude oil. Natural gas
prices affect us more than crude oil prices  because most of our  production and
reserves are natural gas.  Prices also affect the amount of cash flow  available
for capital  expenditures  and our ability to borrow  money or raise  additional
capital.  Lower prices may also make it uneconomical  for us to increase or even
continue current production levels of natural gas and crude oil.


     Prices for natural gas and crude oil are subject to large  fluctuations  in
response to  relatively  minor  changes in the supply and demand for natural gas
and crude oil,  market  uncertainty  and a variety of other  factors  beyond our
control, including:

         o  changes in foreign  and  domestic  supply and demand for natural gas
            and crude oil;

         o  political   stability  and  economic  conditions  in  oil  producing
            countries, particularly in the Middle East;

         o  general economic conditions;

         o  domestic and foreign governmental regulation; and

         o  the price and availability of alternative fuel sources.


     In addition to decreasing our revenue and cash flow from operations, low or
declining  natural  gas and crude oil  prices  could  have  additional  material
adverse effects on us, such as:

         o  reducing the overall volume of natural gas and crude oil that we can
            produce  economically,  thereby  adversely  affecting  our  revenue,
            profitability   and  cash  flow  and  our  ability  to  perform  our
            obligations with respect to the notes;

         o  reducing our borrowing base under the credit facility; and

         o  impairing  our  borrowing  capacity and our ability to obtain equity
            capital.


     Estimates of our proved  reserves and future net revenue are  uncertain and
inherently imprecise.


     The process of  estimating  natural  gas and crude oil  reserves is complex
involving  decisions and  assumptions  in evaluating  the available  geological,
geophysical,  engineering  and economic data.  Accordingly,  these estimates are
imprecise. Actual future production, natural gas and crude oil prices, revenues,
taxes,   development   expenditures,   operating   expenses  and  quantities  of
recoverable  natural gas and crude oil reserves most likely will vary from those
estimated.  Any  significant  variance  could  materially  affect the  estimated
quantities and present value of reserves set forth in this report.  In addition,
we may  adjust  estimates  of proved  reserves  to reflect  production  history,
results of exploitation  and development,  prevailing  natural gas and crude oil
prices and other factors, many of which are beyond our control.


     The  estimates of our reserves  are based upon  various  assumptions  about
future production levels, prices and costs that may not prove to be correct over
time. In particular, estimates of natural gas and crude oil reserves, future net
revenue from proved reserves and the PV-10 thereof for our natural gas and crude
oil properties are based on the assumption that future natural gas and crude oil
prices remain the same as natural gas and crude oil prices at December 31, 2005.
The sales prices as of such date used for purposes of such  estimates were $8.84
per Mcf of natural gas and $56.92 per Bbl of crude oil. This compares with $4.94
per Mcf of natural gas and $41.01 per Bbl of crude oil as of December  31, 2004.


                                       6


These  estimates  also assume that we will make future capital  expenditures  of
approximately  $84.2  million in the aggregate  through 2024,  with the majority
expected to be incurred  from 2006 to 2009,  which are  necessary to develop and
realize  the  value  of  proved  undeveloped  reserves  on our  properties.  Any
significant  variance  in actual  results  from  these  assumptions  could  also
materially affect the estimated quantity and value of reserves set forth in this
report.


     The present value of future net revenues we disclose may not be the current
market value of our estimated natural gas and crude oil reserves.  In accordance
with SEC  requirements,  the  estimated  discounted  future  net cash flows from
proved  reserves  are  generally  based on prices and costs as of the end of the
period of the estimate.  Actual future prices and costs may be materially higher
or lower than the  prices  and costs as of the end of the year of the  estimate.
Any  changes  in  consumption  by  natural  gas  purchasers  or in  governmental
regulations  or taxation  will also  affect  actual  future net cash flows.  The
timing  of both  the  production  and the  expenses  from  the  development  and
production  of natural  gas and crude oil  properties  will affect the timing of
actual future net cash flows from proved  reserves and their present  value.  In
addition,  the 10% discount  factor,  which is required by the SEC to be used in
calculating  discounted  future net cash flows for  reporting  purposes,  is not
necessarily the most accurate  discount factor.  The effective  interest rate at
various times and the risks  associated with us or the natural gas and crude oil
industry in general will affect the accuracy of the 10% discount factor.


     Our  operations  are subject to the numerous risks of natural gas and crude
oil drilling and production activities.


     Our  natural  gas and crude oil  drilling  and  production  activities  are
subject to numerous  risks,  many of which are beyond our  control.  These risks
include  the risk of  fire,  explosions,  blow-outs,  pipe  failure,  abnormally
pressured formations and environmental  hazards.  Environmental  hazards include
oil spills,  natural gas leaks,  ruptures  and  discharges  of toxic  gases.  In
addition,  title  problems,  weather  conditions and mechanical  difficulties or
shortages  or delays in  delivery  of drilling  rigs and other  equipment  could
negatively  affect our  operations.  If any of these or other  similar  industry
operating risks occur, we could have substantial losses. Substantial losses also
may result  from  injury or loss of life,  severe  damage to or  destruction  of
property, clean-up responsibilities,  regulatory investigation and penalties and
suspension of  operations.  In accordance  with industry  practice,  we maintain
insurance  against some, but not all, of the risks  described  above.  We cannot
assure you that our insurance  will be adequate to cover losses or  liabilities.
Also,  we cannot  predict the  continued  availability  of  insurance at premium
levels that justify its purchase.


     We operate in a highly competitive  industry which may adversely affect our
operations.


     We operate in a highly  competitive  environment.  The principal  resources
necessary for the  exploration  and  production of natural gas and crude oil are
leasehold  prospects  under  which  natural  gas and crude oil  reserves  may be
discovered, drilling rigs and related equipment to explore for such reserves and
knowledgeable  personnel  to conduct  all  phases of  natural  gas and crude oil
operations.  We must compete for such  resources with both major natural gas and
crude oil companies and independent  operators.  Many of these  competitors have
financial  and other  resources  substantially  greater  than ours.  Although we
believe our current  operating and financial  resources are adequate to preclude
any significant  disruption of our operations in the immediate future, we cannot
assure you that such materials and resources will be available to us.


     The  unavailability  or high cost of drilling  rigs,  equipment,  supplies,
insurance,  personnel and crude oil field  services could  adversely  affect our
ability to execute our exploration  and development  plans on a timely basis and
within our budget.


     Our  industry is cyclical  and,  from time to time,  there is a shortage of
drilling rigs,  equipment,  supplies,  insurance or qualified personnel.  During
these periods,  the costs and delivery times of rigs, equipment and supplies are
substantially greater. In addition, the demand for, and wage rates of, qualified
drilling rig crews rise as the number of active rigs in service increases.  As a
result of increasing  levels of exploration and production in response to strong
prices of natural gas and crude oil, the demand for oilfield  services has risen
and the costs of these services are increasing.

                                       7



     Our natural gas and crude oil  operations  are subject to various  Federal,
state and local regulations that materially affect our operations.


     Matters  regulated  include permits for drilling  operations,  drilling and
abandonment  bonds,  reports  concerning  operations,  the  spacing of wells and
unitization and pooling of properties and taxation. At various times, regulatory
agencies have imposed price controls and limitations on production.  In order to
conserve  supplies of natural gas and crude oil, these agencies have  restricted
the rates of flow of natural  gas and crude oil wells  below  actual  production
capacity. Federal, state and local laws regulate production,  handling, storage,
transportation  and  disposal  of natural  gas and crude oil,  by-products  from
natural gas and crude oil and other substances and materials produced or used in
connection with natural gas and crude oil operations.  To date, our expenditures
related  to  complying   with  these  laws  and  for   remediation  of  existing
environmental contamination have not been significant. We believe that we are in
substantial  compliance with all applicable laws and regulations.  However,  the
requirements  of such laws and  regulations  are frequently  changed.  We cannot
predict the ultimate cost of compliance with these  requirements or their effect
on our operations.


Risks Related to our Common Stock


     We do not pay dividends on our common stock.


     We have never paid a cash dividend on our common stock and the terms of the
revolving  credit  facility  and the  indenture  relating to the notes limit our
ability to pay dividends on our common stock.


     Shares eligible for future sale may depress our stock price.


     At March 27, 2006, we had 42,588,237  shares of common stock outstanding of
which  3,991,679  shares were held by  affiliates  and, in  addition,  2,588,963
shares of common stock were subject to outstanding options granted under certain
stock option plans (of which 1,704,838 shares were vested at March 27, 2006).


     All of the shares of common  stock held by  affiliates  are  restricted  or
control  securities under Rule 144 promulgated under the Securities Act of 1933,
as amended (the "Securities  Act"). The shares of the common stock issuable upon
exercise of the stock options have been  registered  under the  Securities  Act.
Sales of shares of common  stock under Rule 144 or another  exemption  under the
Securities  Act or pursuant to a  registration  statement  could have a material
adverse  effect on the price of the common stock and could impair our ability to
raise additional capital through the sale of equity securities.


     The price of our  common  stock has been  volatile  and could  continue  to
fluctuate substantially.


     Our common stock is traded on The American Stock Exchange. The market price
of our common stock has been volatile and could fluctuate substantially based on
a variety of factors, including the following:

         o  fluctuations in commodity prices;

         o  variations in results of operations;

         o  legislative or regulatory changes;

         o  general trends in the industry;

         o  market conditions; and

         o  analysts'  estimates  and other  events in the natural gas and crude
            oil industry.


     We may issue shares of preferred  stock with greater  rights than shares of
our common stock.


     Subject  to the rules of The  American  Stock  Exchange,  our  articles  of
incorporation  authorize  our board of  directors to issue one or more series of
preferred  stock and set the terms of the preferred  stock  without  seeking any
further  approval from holders of our common stock.  Any preferred stock that is
issued may rank ahead of our common  stock in terms of  dividends,  priority and
liquidation premiums and may have greater voting rights than our common stock.


                                       8


     Anti-takeover  provisions  could make a third party  acquisition of Abraxas
difficult.


     Our articles of incorporation  and bylaws provide for a classified board of
directors, with each member serving a three-year term, and eliminate the ability
of stockholders to call special meetings or take action by written consent. Each
of the provisions in the articles of incorporation and bylaws could make it more
difficult  for a third  party to acquire  Abraxas  without  the  approval of our
board.  In  addition,   the  Nevada  corporate  statute  also  contains  certain
provisions that could make an acquisition by a third party more difficult.


     An active market may not develop for our common stock.


     Our common stock is quoted on The American Stock  Exchange.  While there is
currently one specialist in our common stock,  this  specialist is not obligated
to continue to make a market in our common stock.  In this event,  the liquidity
of our common stock could be adversely  impacted  and a  stockholder  could have
difficulty obtaining accurate stock quotes.


     Future  issuance  of  additional  shares of our common  stock  could  cause
dilution of ownership interests and adversely affect our stock price.


     We  may  in  the  future  issue  our  previously  authorized  and  unissued
securities,  resulting in the dilution of the ownership interests of our current
stockholders  and  purchasers of common stock offered  hereby.  We are currently
authorized  to issue  200,000,000  shares of common  stock  with such  rights as
determined by our board of directors.  The potential issuance of such additional
shares of common stock may create downward  pressure on the trading price of our
common stock. We may also issue  additional  shares of our common stock or other
securities that are convertible into or exercisable for common stock for capital
raising or other  business  purposes.  Future  sales of  substantial  amounts of
common stock,  or the perception  that sales could occur,  could have a material
adverse effect on the price of our common stock.



                                       9



                                 USE OF PROCEEDS


     Unless we specify otherwise in the applicable  prospectus  supplement,  the
net  proceeds  we  receive  from  the  sale of the  securities  offered  by this
prospectus  and any  prospectus  supplement  will be used for general  corporate
purposes. General corporate purposes may include any of the following:

         o  repaying debt;

         o  providing working capital;

         o  funding capital expenditures;

         o  paying for possible  acquisitions  or the expansion of our business;
            or

         o  repurchasing our capital stock.


We may  temporarily  invest the net  proceeds  we receive  from any  offering of
securities  or use the net  proceeds to repay  short-term  debt until we can use
them for their stated purposes.


                                    DILUTION


     Our net  tangible  book value at December 31, 2005 was $(0.56) per share of
common stock. Net tangible book value per share of common stock is determined by
dividing our tangible net worth,  which is tangible assets less liabilities,  by
the total number of shares of our common stock  outstanding.  If we offer shares
of our  common  stock,  purchasers  of our  common  stock in that  offering  may
experience  immediate  dilution  in net  tangible  book  value  per  share.  The
prospectus supplement relating to an offering of shares of our common stock will
set forth the information regarding any dilutive effect of that offering.


                       RATIO OF EARNINGS TO FIXED CHARGES


     The following  table contains our  consolidated  ratio of earnings to fixed
charges for the periods  indicated.  You should read these ratios in  connection
with  our  consolidated  financial  statements,  including  the  notes  to those
statements, incorporated by reference in this prospectus.




                                            Year Ended December 31,
                       -------------------------------------------------------------------
                           2001         2002          2003         2004          2005
                           ----         ----          ----         ----          ----
                                                                  
        Ratio of
        earnings to
        fixed charges       *             *            *           1.2x          1.4x


         * Earnings inadequate to cover fixed charges.


     Earnings consist of income (loss) from continuing  operations before income
taxes  plus fixed  charges.  Fixed  charges  consist of  interest  expenses  and
amortization  of deferred  financing fees. Our earnings were inadequate to cover
fixed  charges in 2001,  2002 and 2003 by $14.3  million  and $55.2  million and
$13.2 million, respectively. In 2004, we had earnings of $22.7 million and fixed
charges of $19.7  million.  In 2005,  we had earnings of $21.9 million and fixed
charges of $15.6  million.  Our ratio of earnings to fixed  charges was 1.2x and
1.4x in 2004 and 2005, respectively.



                         DESCRIPTION OF DEBT SECURITIES


     The following  description of debt  securities  sets forth certain  general
terms and  provisions of the debt  securities to which this  prospectus  and any
prospectus  supplement may relate.  The  particular  terms of any series of debt


                                       10


Securities  and the  extent  to which  the  general  provisions  may  apply to a
particular  series  of  debt  securities  will  be  described  in  a  prospectus
supplement relating to that series. The debt securities will be issued under one
or  more  separate  indentures  between  us and a  trustee  to be  named  in the
prospectus  supplement.  Senior debt  securities  will be issued  under a senior
indenture and  subordinated  debt securities will be issued under a subordinated
indenture.  Together the senior  indenture  and the  subordinated  indenture are
called indentures.


     Because we have included only a summary of the  indenture  terms,  you must
read the indentures in full to understand  every detail of the terms of the debt
securities.  The summary is not complete.  The forms of the indentures have been
filed as exhibits to the registration statement to which this prospectus relates
and you should read the indentures for provisions that may be important to you.


     As  used  in  this  section  of  the   prospectus  and  under  the  caption
"Description  of Capital  Stock," the terms  "we,"  "our" and "us" mean  Abraxas
Petroleum Corporation only, and not its subsidiaries.


General


     Unless otherwise  indicated in the applicable  prospectus  supplement,  the
debt  securities  will be our  direct,  unsecured  obligations.  The senior debt
securities  will rank equally  with all of our other  senior and  unsubordinated
debt. The subordinated debt securities will have a junior position to certain of
our debt, as described in the  subordinated  securities  themselves or under the
supplemental indenture under which they are issued.


     We conduct some of our operations  through our subsidiaries.  To the extent
of such  operations,  holders of debt  securities will have a position junior to
the prior claims of creditors of our  subsidiaries,  including trade  creditors,
debtholders,  secured creditors,  taxing authorities and guarantee holders,  and
any  preferred  stockholders,  except to the  extent  that we may  ourself  be a
creditor with recognized and unsubordinated claims against any subsidiary.


     If specified in the  prospectus  supplement,  the debt  securities  will be
general  obligations of our  subsidiaries  that execute  subsidiary  guarantees.
Unless  otherwise  specified  in  the  prospectus  supplement,  such  subsidiary
guarantees will be unsecured obligations. See "- Subsidiary Guarantees."


     A prospectus supplement and a supplemental indenture relating to any series
of debt  securities  being offered will include  specific  terms relating to the
offering. These terms will include some or all of the following:

         o  the title and type of the debt securities;

         o  any limit upon the total principal amount of the debt securities;

         o  the dates on which the  principal  and  premium (if any) of the debt
            securities will be payable;

         o  the interest rate or rates, or the method of determination  thereof,
            that the debt  securities  will bear and the interest  payment dates
            for the debt securities;

         o  places  where  payments  of the  principal,  premium,  if  any,  and
            interest may be made on the debt securities;

         o  any optional redemption periods;

         o  any subordination and the terms thereof;

         o  any  sinking  fund,  amortization  or other  provisions  that  would
            obligate us to redeem,  repurchase  or repay some or all of the debt
            securities;

         o  if other than US dollars, the currency or currencies, or the form of
            other securities or property in which principal of (and premium,  if
            any) and/or interest on the debt securities will or may be payable;

         o  any index or other method used to determine the amount of payment of
            principal  of (and  premium,  if any)  and/or  interest  on the debt
            securities;

                                       11


         o  whether any portion of the principal  amount of such debt securities
            is payable  upon  declaration  of the  acceleration  of the maturity
            thereof;

         o  any  additional  means  of  satisfaction  or  discharge  of the debt
            securities;

         o  whether  our  subsidiaries  will  provide  guarantees  of  the  debt
            securities, and the terms of any subordination of such guarantee;

         o  whether the debt securities will be secured or unsecured;

         o  any deletions,  modifications, or additions to the events of default
            or  covenants  pertaining  to the  debt  securities  or made for the
            benefit of the holders thereof;

         o  whether the debt securities will be convertible or exchangeable and,
            if so, the provisions regarding convertibility or exchangeability of
            the debt securities;

         o  whether  the debt  securities  will be subject  to certain  optional
            interest rate reset provisions;

         o  whether the debt securities will be issued as a global debt security
            and,  in that case,  the  identity  of the  depository  for the debt
            securities; and

         o  any other terms of the debt securities.

     Neither of the indentures  limits the amount of debt securities that may be
issued.  Each indenture  allows debt securities to be issued up to the principal
amount that may be  authorized by us and may be in any currency or currency unit
designated by us.


     Debt securities of a series may be issued in registered,  bearer, coupon or
global form.


     The  prospectus  supplement for each series of debt  securities  will state
whether the debt  securities  will be issued in registered  form and whether the
debt  securities  will be in  denominations  other than $1,000 each or multiples
thereof.


Original Issue Discount


     One or more series of debt  securities  offered by this  prospectus  may be
sold at a substantial  discount below their stated principal amount,  bearing no
interest or  interest  at a rate that at the time of  issuance  is below  market
rates. The federal income tax consequences and special considerations applicable
to any series of debt  securities  generally will be described in the applicable
prospectus supplement.


Subsidiary Guarantees


     Our  payment  obligations  under any series of the debt  securities  may be
jointly and severally guaranteed by one or more of our subsidiaries. If a series
of  debt  securities  is  so  guaranteed  by  any  of  our  subsidiaries,   such
subsidiaries  will execute a supplemental  indenture or notation of guarantee as
further evidence of their guarantee.  The applicable  prospectus supplement will
describe the terms of any guarantee by our subsidiaries.


     The  obligations of each subsidiary  under its subsidiary  guarantee may be
limited to the maximum amount that will not result in such guarantee obligations
constituting  a fraudulent  conveyance or fraudulent  transfer  under federal or
state law, after giving effect to all other contingent and fixed  liabilities of
that subsidiary and any collections from or payments made by or on behalf of any
other  subsidiary  guarantor in respect to its obligations  under its subsidiary
guarantee.


     Each  indenture  may  restrict  consolidations  or  mergers  with or into a
subsidiary  guarantor  or  provide  for  the  release  of a  subsidiary  from  a
subsidiary  guarantee,  as set forth in a  related  prospectus  supplement,  the
applicable indenture, and any applicable related supplemental indenture.


     If a series of debt  securities is guaranteed  by our  subsidiaries  and is
designated  as  subordinate  to our senior  debt,  then the  guarantee  by those
subsidiaries  will be subordinated to their senior debt and will be subordinated
to  any   guarantees  by  those   subsidiaries   of  our  senior  debt.  See  "-
Subordination."

                                       12


Subordination


     Under the subordinated  indenture,  payment of the principal,  interest and
any premium on the  subordinated  debt securities will generally be subordinated
and  junior  in  right  of  payment  to the  prior  payment  in full of any debt
specified in the applicable prospectus supplement and supplemental  indenture as
being senior to the subordinated debt.


Consolidation, Merger or Sale


     The indentures  generally  permit a consolidation  or merger between us and
another entity.  They also permit the sale by us of all or substantially  all of
our property and assets.  If this  happens,  the  remaining or acquiring  entity
shall assume all of our  responsibilities  and liabilities under the indentures,
including the payment of all amounts due on the debt  securities and performance
of the covenants in the indentures.  However,  we will consolidate or merge with
or into any other  entity or sell all or  substantially  all of our assets  only
according  to the terms and  conditions  of the  indentures.  The  remaining  or
acquiring  entity will be  substituted  for us in the  indentures  with the same
effect as if it had been an original party to the  indentures.  Thereafter,  the
successor entity may exercise our rights and powers under any indenture,  in our
name or in its own name. Any act or proceeding  required or permitted to be done
by our board of  directors  or any of our  officers  may be done by the board or
officers of the successor  entity.  If we sell all or  substantially  all of our
assets, upon compliance with these provisions, we shall be released from all our
liabilities and obligations under any indenture and under the debt securities.


Modification of Indentures


     Under  each  indenture  our rights  and  obligations  and the rights of the
holders  may be  modified  with the  consent of the  holders  of a  majority  in
aggregate  principal  amount of the  outstanding  debt securities of each series
affected by the  modification.  No  modification  of the  principal  or interest
payment  terms,  and  no  modification  reducing  the  percentage  required  for
modifications, is effective against any holder without its consent.


Events of Default


     Each of the  indentures  defines an event of default  with  respect to debt
securities of any series as any of the following events:

         o  failure to pay interest on any debt security for 30 days after it is
            due;

         o  failure to pay the  principal  of or  premium,  if any,  on any debt
            security when due;

         o  failure to deposit any sinking  fund payment for 30 days after it is
            due;

         o  failure  to  perform  any  other  covenant  in  the  indenture  that
            continues for 60 days after being given written notice;

         o  certain events of bankruptcy, insolvency or reorganization; or

         o  any other event of default included in any indenture or supplemental
            indenture.


     An event of default for a  particular  series of debt  securities  does not
necessarily  constitute  an  event  of  default  for any  other  series  of debt
securities  issued under an  indenture.  The trustee may withhold  notice to the
holders of debt securities of any default (except in the payment of principal or
interest) if it considers such withholding of notice to be in the best interests
of the holders.


     If an event  of  default  for any  series  of debt  securities  occurs  and
continues,  the  trustee or the holders of at least 25% in  aggregate  principal
amount of the debt securities of the series may declare the entire  principal of
all the debt securities of that series to be due and payable immediately.  If an
event of default  occurs and is  continuing  with  respect to all series of debt
securities  as a result of a failure  to perform a  covenant  applicable  to all
securities or because of bankruptcy,  insolvency or reorganization,  the trustee
or the holders of at least 25% in aggregate  principal amount of all of the debt
securities may declare the entire principal of all the debt securities to be due
and payable  immediately.  If either of these events occurs,  subject to certain
conditions,  the holders of a majority of the aggregate  principal amount of the
debt securities of that series (or of the debt securities of all series,  as the
case may be) can void the declaration. There is no automatic acceleration,  even
in the event of bankruptcy, insolvency or reorganization.

                                       13


     Other than its duties in case of a default,  a trustee is not  obligated to
exercise any of its rights or powers under any  indenture at the request,  order
or  direction of any holders,  unless the holders  offer the trustee  reasonable
indemnity.  If they provide this  reasonable  indemnification,  the holders of a
majority in  principal  amount of any series of debt  securities  may direct the
time,  method and place of conducting any proceeding or any remedy  available to
the trustee, or exercising any power conferred upon the trustee,  for any series
of debt securities.


Covenants


     Under the indentures, we will:

         o  pay the  principal  of, and  interest  and any  premium on, the debt
            securities when due;

         o  maintain a place of payment;

         o  deliver  a report  to the  trustee  at the end of each  fiscal  year
            reviewing our obligations under the indentures; and

         o  deposit  sufficient funds with any paying agent on or before the due
            date for any principal, interest or premium.


Equal and Ratable Securitization


     Neither we nor any restricted  subsidiary may secure senior debt securities
of any series unless the debt  securities of every other series are also equally
and  ratably  secured.  The  subordinated  securities  have no such  restrictive
covenant.


Payment and Transfer


     Principal,  interest and any premium on fully registered securities will be
paid at designated  places.  Payment will be made by check mailed to the persons
in whose names the debt  securities  are  registered  on days  specified  in the
indentures or any prospectus supplement. Debt securities payments in other forms
will  be  paid  at a  place  designated  by us  and  specified  in a  prospectus
supplement.


     Fully  registered  securities  may  be  transferred  or  exchanged  at  the
corporate  trust  office  of  the  trustee  or at any  other  office  or  agency
maintained  by us for such  purposes  without the payment of any service  charge
except for any tax or governmental charge.


Global Securities


     Certain  series of the debt  securities  may be issued as permanent  global
debt  securities to be deposited with a depositary  with respect to that series.
Unless  otherwise  indicated in the  prospectus  supplement,  the following is a
summary of the depository  arrangements  applicable to debt securities issued in
permanent global form and for which The Depositary Trust Company ("DTC") acts as
depositary.


     Each global debt security will be deposited  with, or on behalf of, DTC, as
depositary,  or its  nominee  and  registered  in the name of a nominee  of DTC.
Except under the limited  circumstances  described below, global debt securities
are not exchangeable for definitive certificated debt securities.


     Ownership of  beneficial  interests in a global debt security is limited to
institutions  that have  accounts  with DTC or its nominee  ("participants")  or
persons that may hold interests through participants.  In addition, ownership of
beneficial interests by participants in a global debt security will be evidenced
only by, and the  transfer of that  ownership  interest  will be  effected  only
through,  records  maintained by DTC or its nominee for a global debt  security.
Ownership of beneficial interests in a global debt security by persons that hold
through  participants  will be  evidenced  only  by,  and the  transfer  of that
ownership  interest  within  that  participant  will be effected  only  through,
records  maintained  by that  participant.  DTC has no  knowledge  of the actual
beneficial  owners of the debt  securities.  Beneficial  owners will not receive
written  confirmation  from DTC of their  purchase,  but  beneficial  owners are
expected to receive written confirmations  providing details of the transaction,
as well as periodic statements of their holdings,  from the participants through
which  the  beneficial  owners  entered  the  transaction.   The  laws  of  some
jurisdictions  require that  certain  purchasers  of  securities  take  physical
delivery of such securities in definitive form. Such laws may impair the ability
to transfer beneficial interests in a global debt security.

                                       14



     Payment of principal of, and interest on, debt securities  represented by a
global  debt  security  registered  in the name of or held by DTC or its nominee
will be made to DTC or its nominee,  as the case may be, as the registered owner
and holder of the global debt security  representing  those debt securities.  We
have been advised by DTC that upon  receipt of any payment of  principal  of, or
interest on, a global debt security,  DTC will  immediately  credit  accounts of
participants on its book-entry registration and transfer system with payments in
amounts  proportionate to their respective beneficial interests in the principal
amount of that global debt security as shown in the records of DTC.  Payments by
participants  to owners of  beneficial  interests in a global debt security held
through  those  participants  will be  governed  by  standing  instructions  and
customary practices, as is now the case with securities held for the accounts of
customers in bearer form or  registered  in "street  name," and will be the sole
responsibility  of those  participants,  subject to any  statutory or regulatory
requirements that may be in effect from time to time.


     Neither  we,  any  trustee  nor  any  of  our  respective  agents  will  be
responsible for any aspect of the records of DTC, any nominee or any participant
relating to, or payments made on account of, beneficial interests in a permanent
global debt  security or for  maintaining,  supervising  or reviewing any of the
records of DTC,  any  nominee or any  participant  relating  to such  beneficial
interests.


     A global debt  security is  exchangeable  for  definitive  debt  securities
registered  in the name of,  and a transfer  of a global  debt  security  may be
registered to, any person other than DTC or its nominee, only if:

         o  DTC  notifies  us that it is  unwilling  or  unable to  continue  as
            depositary  for that global debt  security or at any time DTC ceases
            to be registered under the Securities Exchange Act of 1934;

         o  we determine in our  discretion  that the global debt security shall
            be exchangeable  for definitive debt securities in registered  form;
            or

         o  there shall have  occurred and be  continuing an event of default or
            an event  which,  with  notice or the  lapse of time or both,  would
            constitute an event of default under the debt securities.


     Any global debt  security  that is  exchangeable  pursuant to the preceding
sentence  will be  exchangeable  in whole  for  definitive  debt  securities  in
registered form, of like tenor and of an equal aggregate principal amount as the
global debt security,  in denominations  specified in the applicable  prospectus
supplement  (if other  than  $1,000  and  integral  multiples  of  $1,000).  The
definitive  debt  securities  will be registered by the registrar in the name or
names  instructed  by DTC. We expect that these  instructions  may be based upon
directions  received by DTC from its  participants  with respect to ownership of
beneficial interests in the global debt security.


     Except as provided  above,  owners of the beneficial  interests in a global
debt  security  will  not be  entitled  to  receive  physical  delivery  of debt
securities  in definitive  form and will not be  considered  the holders of debt
securities for any purpose under the  indentures.  No global debt security shall
be exchangeable except for another global debt security of like denomination and
tenor to be  registered  in the name of DTC or its  nominee.  Accordingly,  each
person  owning a beneficial  interest in a global debt security must rely on the
procedures of DTC and, if that person is not a participant, on the procedures of
the  participant  through which that person owns its  interest,  to exercise any
rights of a holder under the global debt security or the indentures.


     We understand that, under existing industry practices, in the event that we
request any action of holders,  or an owner of a beneficial interest in a global
debt  security  desires to give or take any action  that a holder is entitled to
give or take under the debt  securities or the  indentures,  DTC would authorize
the participants  holding the relevant beneficial interests to give or take that
action, and those participants would authorize  beneficial owners owning through
those  participants  to give or take that action or would otherwise act upon the
instructions of beneficial owners owning through them.


     DTC has advised us that DTC is a limited  purpose trust  company  organized
under the laws of the State of New York,  a  "banking  organization"  within the
meaning of the New York Banking Law, a member of the Federal Reserve  System,  a
"clearing  corporation"  within the meaning of the New York  Uniform  Commercial
Code and a "clearing  agency"  registered  under the Securities  Exchange Act of
1934. DTC was created to hold securities of its  participants  and to facilitate
the clearance and settlement of securities  transactions  among its participants


                                       15


in those securities  through  electronic  book-entry  changes in accounts of the
participants,  thereby  eliminating the need for physical movement of securities
certificates.  DTC's participants include securities brokers and dealers, banks,
trust companies,  clearing corporations and certain other organizations.  DTC is
owned by a number of its participants and by the New York Stock Exchange,  Inc.,
the American  Stock  Exchange,  Inc. and the National  Association of Securities
Dealers,  Inc.  Access to DTC's  book-entry  system is also available to others,
such as banks,  brokers,  dealers  and trust  companies  that  clear  through or
maintain  a  custodial  relationship  with a  participant,  either  directly  or
indirectly.  The rules  applicable to DTC and its  participants are on file with
the Securities and Exchange Commission.


Defeasance


     We will be discharged  from our  obligations on the debt  securities of any
series at any time if we deposit with the trustee  sufficient cash or government
securities to pay the principal, interest, any premium and any other sums due to
the stated  maturity  date or a redemption  date of the debt  securities  of the
series.  If this happens,  the holders of the debt securities of the series will
not be entitled to the  benefits of the  indenture  except for  registration  of
transfer and exchange of debt  securities  and  replacement  of lost,  stolen or
mutilated debt securities.


     We must also obtain an opinion of counsel to the effect that as a result of
the  defeasance,  holders of that series of debt  securities  will not recognize
income,  gain or loss for  federal  income tax  purposes  and will be subject to
federal  income tax on the same amount,  in the same manner and at the same time
as would have been the case if such defeasance had not occurred.


Meetings


     Each indenture contains  provisions  describing how meetings of the holders
of debt  securities of a series may be convened.  A meeting may be called at any
time by the trustee,  and also,  upon request,  by us or the holders of at least
20% in principal amount of the outstanding debt securities of a series. A notice
of the meeting  must  always be given in the manner  described  under  "Notices"
below.  Generally  speaking,  except for any  consent  that must be given by all
holders of a series as described under  "Modification of Indentures"  above, any
resolution  presented at a meeting of the holders of a series of debt securities
may be adopted by the affirmative vote of the holders of a majority in principal
amount of the outstanding  debt securities of that series,  unless the indenture
allows the action to be voted upon to be taken with the  approval of the holders
of a different  specific  percentage  of principal  amount of  outstanding  debt
securities of a series. In that case, the holders of outstanding debt securities
of at least  the  specified  percentage  must vote in favor of the  action.  Any
resolution passed or decision taken at any meeting of holders of debt securities
of any series in accordance with the applicable indenture will be binding on all
holders of debt securities of that series and any related  coupons,  unless,  as
discussed in  "Modification  of Indentures"  above, the action is only effective
against holders that have approved it. The quorum at any meeting called to adopt
a  resolution,  and at any  reconvened  meeting,  will  be  holders  holding  or
representing a majority in principal  amount of the outstanding  debt securities
of a series.


Governing Law


     Each indenture and the debt securities will be governed by and construed in
accordance with the laws of the State of New York.


Notices


     Notices  to  holders  of  debt  securities  will  be  given  by mail to the
addresses of such holders as they appear in the security register.


Revolving Credit Facility


     Our  revolving  credit  facility  provides  for a maximum  $15  million  in
commitments and matures in 2008.  Borrowings under our revolving credit facility
are secured by  substantially  all of our natural gas and crude oil  properties.
The collateral value and borrowing base are redetermined  semi-annually  and are
based in part on  prevailing  natural  gas and crude oil prices.  The  revolving
credit facility agreement contains various covenants and restrictive provisions,
which limit our ability,  among other things, to incur additional  indebtedness,
sell  properties,  purchase or redeem our capital  stock,  pay  dividends,  make
investments  or loans,  create  liens and make certain  acquisitions  as well as
certain financial covenants.

                                       16



Senior Notes


     We have issued $125.0  million of floating  rate senior  secured notes that
mature in 2009. The senior notes are secured  obligations  ranking  equally with
our revolving credit facility and have covenants similar to the revolving credit
facility. The notes are guaranteed by all of our current subsidiaries.


                          DESCRIPTION OF CAPITAL STOCK


Common Stock


     Abraxas is currently authorized to issue up to 200,000,000 shares of common
stock, par value $.01 per share.


     As of March 27,  2006,  there were  42,588,327  shares of our common  stock
issued and  outstanding.  Holders of the common  stock are  entitled to cast one
vote for  each  share  held of  record  on all  matters  submitted  to a vote of
stockholders  and are not  entitled  to  cumulate  votes  for  the  election  of
directors.  Holders of common stock do not have  preemptive  rights to subscribe
for additional shares of common stock issued by us.


     Holders of our common  stock are  entitled to receive  dividends  as may be
declared by the Board of  Directors  out of funds  legally  available  therefor.
Under the terms of the notes indenture and our revolving credit facility, we may
not pay  dividends on shares of our common stock.  In the event of  liquidation,
holders of the common stock are  entitled to share pro rata in any  distribution
of our assets remaining after payment of liabilities, subject to the preferences
and rights of the holders of any outstanding  shares of our preferred stock. All
of the outstanding shares of our common stock are fully paid and nonassessable.


Preferred Stock


     Our  articles of  incorporation  authorize  the issuance of up to 1,000,000
shares of preferred stock, par value $.01 per share, in one or more series.  The
Board of Directors is authorized, without any further action by stockholders, to
determine the rights, preferences,  privileges and restrictions of any series of
preferred  stock,  the number of shares  constituting  any such series,  and the
designation  thereof.  The rights of holders of common stock will be subject to,
and may be adversely  affected by, the rights of holders of any preferred  stock
that may be issued in the future.


     If we offer preferred  stock, a description  will be filed with the SEC and
the  certificate  of  designation  for any  series of  preferred  stock  will be
described  in a  prospectus  supplement.  If  so  indicated  in  the  prospectus
supplement  relating to a particular series of preferred stock, the terms of any
such series of preferred  stock may differ from the terms set forth  below.  The
terms of the preferred stock may include:

         o  the title of the series and the number of shares in the series;

         o  the price at which the preferred stock will be offered;

         o  the dividend rate or rates or method of calculating  the rates,  the
            dates  on  which  the  dividends  will be  payable,  whether  or not
            dividends  will be cumulative or  noncumulative  and, if cumulative,
            the dates from which  dividends on the preferred stock being offered
            will cumulate;

         o  the voting  rights,  if any,  of holders of shares of the  preferred
            stock being offered;

         o  the  provisions  for a sinking fund, if any, and the  provisions for
            redemption, if applicable, of the preferred stock being offered;

         o  the liquidation preference per share;

         o  the terms and  conditions,  if applicable,  upon which the preferred
            stock  being  offered  will be  convertible  into our common  stock,
            including the conversion  price,  or the manner of  calculating  the
            conversion price, and the conversion period;

                                       17

         o  the terms and  conditions,  if applicable,  upon which the preferred
            stock  being  offered  will be  exchangeable  for  debt  securities,
            including  the  exchange  price,  or the manner of  calculating  the
            exchange price, and the exchange period;

         o  any listing of the preferred  stock being offered on any  securities
            exchange;

         o  whether interests in the shares of the series will be represented by
            depositary shares;

         o  the relative  ranking and  preferences of the preferred  stock being
            offered  as  to  dividend   rights  and  rights  upon   liquidation,
            dissolution or the winding up of our affairs;

         o  any  limitations on the issuance of any class or series of preferred
            stock ranking senior or equal to the series of preferred stock being
            offered  as  to  dividend   rights  and  rights  upon   liquidation,
            dissolution or the winding up of our affairs; and

         o  any additional rights, preferences, qualifications,  limitations and
            restrictions of the series.

     Upon  issuance,  the  shares  of  preferred  stock  will be fully  paid and
nonassessable,  which means that holders  thereof will have paid their  purchase
price in full and we may not require them to pay  additional  funds.  Holders of
preferred stock will not have any preemptive rights.

     The transfer agent and registrar for the preferred stock will be identified
in the applicable prospectus supplement.


Depositary Shares

     We may, at our option, elect to offer fractional shares of preferred stock,
rather  than full  shares of  preferred  stock.  If we do, we will  issue to the
public receipts for depositary  shares, and each of these depositary shares will
represent a fraction of a share of a particular series of preferred stock.


     Description of Depositary Shares.

     The shares of any  series of  preferred  stock  underlying  the  depositary
shares  will be  deposited  under a deposit  agreement  between us and a bank or
trust company  selected by us to be the depositary.  Subject to the terms of the
deposit  agreement,  each  owner of a  depositary  share  will be  entitled,  in
proportion to the applicable  fractional  interest in shares of preferred  stock
underlying  that  depositary  share,  to all the rights and  preferences  of the
preferred stock underlying that depositary share.


     The  depositary  shares will be evidenced  by  depositary  receipts  issued
pursuant to the deposit agreement.  Depositary  receipts will be issued to those
persons who purchase the fractional  interests in the preferred stock underlying
the  depositary  shares,  in  accordance  with the  terms of the  offering.  The
following  summary  of the  deposit  agreement,  the  depositary  shares and the
depositary  receipts  is not  complete.  You  should  refer to the  forms of the
deposit  agreement and depositary  receipts that may be filed as exhibits to the
registration statement in the event we issue depositary shares.

     Dividends and Other Distributions.

     The   depositary   will   distribute  all  cash  dividends  or  other  cash
distributions  received in respect of the preferred  stock to record  holders of
depositary  shares  relating to that preferred stock in proportion to the number
of depositary shares owned by those holders.


     If  there  is a  distribution  other  than in  cash,  the  depositary  will
distribute  property  received by it to record holders of depositary shares that
are entitled to receive the distribution,  unless the depositary determines that
it is not feasible to make the distribution. If this occurs, the depositary may,
with our approval,  sell the property and  distribute  the net proceeds from the
sale to the applicable holders.


     Redemption of Depositary Shares.


     If a series of preferred stock underlying the depositary  shares is subject
to redemption, the depositary shares will be redeemed from the proceeds received
by the depositary  resulting from the  redemption,  in whole or in part, of that
series of  preferred  stock held by the  depositary.  The  redemption  price per
depositary  share will be equal to the  applicable  fraction  of the  redemption
price per share  payable  with  respect to that series of the  preferred  stock.
Whenever we redeem  shares of preferred  stock that are held by the  depositary,
the  depositary  will  redeem,  as of the same  redemption  date,  the number of


                                       18


depositary  shares  representing  the shares of preferred stock so redeemed.  If
fewer than all the depositary  shares are to be redeemed,  the depositary shares
to be  redeemed  will  be  selected  by lot or pro  rata  as  determined  by the
depositary.

     After the date  fixed for  redemption,  the  depositary  shares  called for
redemption  will no longer be  outstanding,  and all  rights of holders of those
depositary shares will cease, except the right to receive any money, securities,
or other property upon  surrender to the  depositary of the depositary  receipts
evidencing those depositary shares.

     Voting the Preferred Stock.


     Upon receipt of notice of any meeting at which  holders of preferred  stock
are entitled to vote, the depositary will mail the information  contained in the
notice of meeting to record holders of the  depositary  shares  underlying  that
preferred  stock.  Each record holder of those  depositary  shares on the record
date (which will be the same date as the record  date for the  preferred  stock)
will be entitled to instruct  the  depositary  as to the  exercise of the voting
rights  pertaining to the amount of the preferred stock underlying that holder's
depositary shares.  The depositary will try, as far as practicable,  to vote the
number  of shares of  preferred  stock  underlying  those  depositary  shares in
accordance  with such  instructions,  and we will agree to take all action which
may be deemed  necessary by the  depositary in order to enable the depositary to
do so. The depositary  will not vote the shares of preferred stock to the extent
it does not receive  specific  instructions  from holders of  depositary  shares
underlying the preferred stock.

     Amendment and Termination of the Depositary Agreement.

     The form of depositary  receipt  evidencing the  depositary  shares and any
provision  of the  deposit  agreement  may be amended  at any time by  agreement
between us and the  depositary.  However,  any  amendment  that  materially  and
adversely  alters  the  rights  of  holders  of  depositary  shares  will not be
effective  unless  the  amendment  has been  approved  by  holders of at least a
majority of the depositary shares then outstanding. The deposit agreement may be
terminated by us or by the  depositary  only if (i) all  outstanding  depositary
shares  have been  redeemed or (ii) there has been a final  distribution  of the
underlying  preferred stock in connection with our  liquidation,  dissolution or
winding up and the preferred stock has been distributed to holders of depositary
receipts.

     Resignation and Removal of Depositary.

     The  depositary  may resign at any time by delivering a notice to us of its
election  to do  so.  We  may  remove  the  depositary  at any  time.  Any  such
resignation  or removal  will take  effect upon the  appointment  of a successor
depositary and its acceptance of its appointment.  The successor depositary must
be  appointed  within 60 days after  delivery  of the notice of  resignation  or
removal.

     Miscellaneous.

     The depositary  will forward to holders of depository  receipts all reports
and  communications  from us that we deliver to the  depositary  and that we are
required to furnish to the holders of the preferred stock.

     Neither we nor the  depositary  will be liable if either of us is prevented
or  delayed by law or any  circumstance  beyond our  control in  performing  our
respective obligations under the deposit agreement. Our obligations and those of
the  depositary  will  be  limited  to the  performance  in  good  faith  of our
respective  duties under the deposit  agreement.  Neither we nor the  depositary
will be obligated to prosecute or defend any legal  proceeding in respect of any
depositary shares or preferred stock unless satisfactory indemnity is furnished.
We and the depositary may rely upon written advice of counsel or accountants, or
upon  information  provided by persons  presenting  preferred stock for deposit,
holders of depositary  receipts or other persons believed to be competent and on
documents believed to be genuine.

Anti-takeover Effects of Certain Provisions of the Articles of Incorporation and
Bylaws

     Our articles of incorporation and bylaws provide for the Board of Directors
to be divided  into three  classes of  directors  serving  staggered  three-year
terms.  As a result,  approximately  one-third of the Board of Directors will be
elected each year.  The articles of  incorporation  and bylaws  provide that the
Board of  Directors  will  consist of not less than  three nor more than  twelve
members,  with  the  exact  number  to be  determined  from  time to time by the
affirmative  vote of a  majority  of  directors  then in  office.  The  Board of
Directors,  and not the stockholders,  has the authority to determine the number
of directors.  This  provision  could  prevent any  stockholder  from  obtaining

                                       19


majority  representation  on our Board of Directors  by  enlarging  the Board of
Directors  and by  filling  the new  directorships  with the  stockholder's  own
nominees.  In addition,  directors may be removed by the  stockholders  only for
cause.


     The articles of  incorporation  and bylaws provide that special meetings of
our  stockholders may be called only by the Chairman of the Board, the President
or a majority of the members of the Board of Directors.  This provision may make
it more  difficult  for  stockholders  to take  actions  opposed by the Board of
Directors.


     The articles of  incorporation  and bylaws provide that any action required
to be taken  or  which  may be taken by  holders  of our  common  stock  must be
effected at a duly called annual or special meeting of such holders, and may not
be taken by any written consent of such stockholders.  These provisions may have
the effect of delaying  consideration  of a stockholder  proposal until the next
annual  meeting  unless a special  meeting  is called by the  persons  set forth
above.  The provisions of the articles of incorporation  and bylaws  prohibiting
stockholder action by written consent could prevent holders of a majority of the
voting  power of  Abraxas  from  using the  written  consent  procedure  to take
stockholder  action and  result in us taking  action  without  giving all of our
stockholders   entitled  to  vote  on  a  proposed  action  the  opportunity  to
participate in determining such proposed action.


Anti-Takeover Statutes


     The  Nevada  General  Corporation  Law  (the  "Nevada  GCL")  contains  two
provisions,  described below as "Combination  Provisions" and the "Control Share
Act," that may make the  unsolicited or hostile  attempts to acquire  control of
Abraxas through certain types of transactions more difficult.


     Restrictions on Certain Combinations  between Nevada Resident  Corporations
and Interested Stockholders.


     The Nevada GCL includes certain  provisions (the "Combination  Provisions")
prohibiting  certain  "combinations"   (generally  defined  to  include  certain
mergers,  disposition  of assets  transactions,  and share  issuance or transfer
transactions)  between  a  resident  domestic  corporation  and  an  "interested
stockholder" (generally defined to be the beneficial owner of 10% or more of the
voting  power  of the  outstanding  shares  of the  corporation),  except  those
combinations which are approved by a corporation's board of directors before the
interested stockholder first obtained a 10% interest in the corporation's stock.
There are additional exceptions to the prohibition,  which apply to combinations
if they occur more than three years after the interested  stockholder's  date of
acquiring shares. The Combination Provisions apply unless the corporation elects
against  their  application  in its  original  articles of  incorporation  or an
amendment thereto,  or timely elected against their application in its bylaws no
later than October 31, 1991.  Our  articles of  incorporation  and bylaws do not
currently contain a provision rendering the Combination Provisions  inapplicable
to us.


     Nevada Control Share Act.


     Nevada's  Control Share  Acquisition  Act (the "Control Share Act") imposes
procedural hurdles on and curtails greenmail practices of corporate raiders. The
Control  Share Act  temporarily  disenfranchises  the voting  power of  "control
shares" of a person or group  ("Acquiring  Person")  purchasing  a  "controlling
interest" in an "issuing  corporation" (as defined in the Nevada GCL) not opting
out of the Control  Share Act. In this regard,  the Control Share Act will apply
to an issuing corporation unless, before an acquisition is made, the articles of
incorporation  or bylaws in effect on the tenth day following the acquisition of
a  controlling  interest  provide  that  it is  inapplicable.  Our  articles  of
incorporation  and bylaws do not  currently  contain a provision  rendering  the
Control Share Act inapplicable to us.


     Under the  Control  Share Act,  an  issuing  corporation  is a  corporation
organized in Nevada which has 200 or more stockholders, at least 100 of whom are
stockholders  of record and  residents  of Nevada,  and which does  business  in
Nevada directly or through an affiliated company.  Our status at the time of the
occurrence of a transaction governed by the Control Share Act (assuming that our
articles  of  incorporation  or bylaws  have not by that time  been  amended  to
include an opting out provision)  would determine  whether the Control Share Act
is applicable.


     The  Control  Share  Act  requires  an  Acquiring  Person  to take  certain
procedural  steps before such Acquiring  Person can obtain the full voting power
of the  control  shares.  Control  shares  are the shares of a  corporation  (1)


                                       20


acquired or offered to be acquired which will enable the Acquiring Person to own
a controlling  interest,  and (2) acquired within 90 days immediately  preceding
that date. A  controlling  interest is defined as the  ownership of shares which
would  enable  the  Acquiring  Person  to  exercise  certain  graduated  amounts
(beginning with one-fifth) of all voting power of the corporation. The Acquiring
Person may not vote any control shares without first obtaining approval from the
stockholders not characterized as interested stockholders.


     To obtain voting rights in control shares, the Acquiring Person must file a
statement at the registered office of the issuer ("Offeror's Statement") setting
forth certain  information  about the  acquisition  or intended  acquisition  of
stock.   The  Offeror's   Statement  may  also  request  a  special  meeting  of
stockholders  to  determine  the voting  rights to be accorded to the  Acquiring
Person.  A special  meeting of  stockholders  must then be held at the Acquiring
Person's expense within 30 to 50 days after the Offeror's Statement is filed. If
a special meeting is not requested by the Acquiring  Person,  the matter will be
addressed at the next regular or special meeting of stockholders.


     At the  special or annual  meeting  at which the issue of voting  rights of
control shares will be addressed,  interested  stockholders  may not vote on the
question of granting  voting  rights to control  the  corporation  or its parent
unless  the  articles  of  incorporation  of  the  issuing  corporation  provide
otherwise.  Our articles of incorporation  do not currently  contain a provision
allowing for such voting power.


     If  full  voting  power  is  granted  to  the   Acquiring   Person  by  the
disinterested stockholders, and the Acquiring Person has acquired control shares
with a majority or more of the voting power, then (unless otherwise  provided in
the articles of incorporation or bylaws in effect on the tenth day following the
acquisition of a controlling  interest) all  stockholders of record,  other than
the Acquiring Person,  who have not voted in favor of authorizing  voting rights
for the control shares, must be sent a "dissenter's notice" advising them of the
fact and of their right to receive "fair value" for their  shares.  Our articles
of  incorporation  and bylaws do not provide  otherwise.  By the date set in the
dissenter's  notice,  which may not be less than 30 nor more than 60 days  after
the dissenter's notice is delivered,  any such stockholder may demand to receive
from the corporation the fair value for all or part of his shares. Fair value is
defined in the Control  Share Act as "not less than the highest  price per share
paid by the Acquiring Person in an acquisition."


     The Control Share Act permits a corporation to redeem the control shares in
the following two instances,  if so provided in the articles of incorporation or
bylaws of the  corporation in effect on the tenth day following the  acquisition
of a  controlling  interest:  (1) if the  Acquiring  Person fails to deliver the
Offeror's  Statement  to the  corporation  within 10 days  after  the  Acquiring
Person's  acquisition of the control shares; or (2) if an Offeror's Statement is
delivered,  but the control  shares are not accorded  full voting  rights by the
stockholders. Our articles of incorporation and bylaws do not so provided.


Transfer Agent and Registrar


     The transfer  agent and  registrar  for our common stock is American  Stock
Transfer & Trust Company.


                             DESCRIPTION OF WARRANTS


     We may issue warrants to purchase debt or equity  securities.  We may issue
warrants independently or together with any offered securities. The warrants may
be attached  to or  separate  from those  offered  securities.  We may issue the
warrants  under  warrant  agreements to be entered into between us and a bank or
trust company,  as warrant agent, all as described in the applicable  prospectus
supplement.


     The prospectus  supplement  relating to any warrants that we may offer will
contain  the  specific  terms of the  warrants.  These  terms  may  include  the
following:

         o  the title of the warrants;

         o  the  designation,  amount and terms of the  securities for which the
            warrants are exercisable;

                                       21


         o  the  designation  and terms of the other  securities,  if any,  with
            which the  warrants  are to be  issued  and the  number of  warrants
            issued with each other security;

         o  the price or prices at which the warrants will issued;

         o  the aggregate number of warrants;

         o  any  provisions for adjustment of the number of amount of securities
            receivable  upon  exercise of the warrants or the exercise  price of
            the warrants;

         o  the  price  or  prices  at which  the  securities  purchasable  upon
            exercise of the warrants may be purchased;

         o  if  applicable,  the date on and after  which the  warrants  and the
            securities  purchasable  upon  exercise  of  the  warrants  will  be
            separately transferable;

         o  the date on which the right to exercise the warrants will  commence,
            and the date on which the right will expire;

         o  the maximum or minimum  number of warrants  that may be exercised at
            any time;

         o  information with respect to book-entry procedures, if any; and

         o  any other terms of the warrants,  including  terms,  procedures  and
            limitations relating to the exchange and exercise of the warrants.


     Further terms of the warrants and the applicable  warrant agreement will be
set forth in the applicable prospectus supplement.


                              DESCRIPTION OF UNITS


     As specified in the applicable  prospectus  supplement,  we may issue units
consisting of one or more debt  securities,  shares of common  stock,  shares of
preferred  stock,  depositary  shares or  warrants  or any  combination  of such
securities, including guarantees of any securities.


     The applicable  prospectus  supplement  will specify the following terms of
any units in respect of which this prospectus is being delivered:

         o  the  terms of the units  and of any of the debt  securities,  common
            stock, preferred stock,  depositary shares,  warrants and guarantees
            comprising the units, including whether and under what circumstances
            the securities comprising the units may be traded separately;

         o  a  description  of the  terms of any unit  agreement  governing  the
            units; and

         o  a  description  of  the  provisions  for  the  payment,  settlement,
            transfer or exchange of the units.




                              PLAN OF DISTRIBUTION


     We may sell securities pursuant to this prospectus (a) through underwriters
or dealers,  (b) through  agents,  (c) directly to one or more purchasers or (d)
through a combination  of any such methods of sale.  The  prospectus  supplement
relating to any offering of securities may include the following information:

         o  the terms of the offer;

         o  the names of any underwriters, dealers or agents;

         o  the name or names of any managing underwriter or underwriters;

         o  the purchase price of the securities from us;

         o  the net proceeds to us from the sale of the securities;

                                       22


         o  any delayed delivery arrangements;

         o  any underwriting discounts,  commissions or other items constituting
            underwriters' compensation;

         o  any initial public offering price;

         o  any  discounts  or  concessions  allowed  or  reallowed  or  paid to
            dealers; and

         o  any commissions paid to agents.


Sales Through Underwriters or Dealers


     If we use  underwriters  in the sale,  the  underwriters  will  acquire the
securities for their own accounts.  The  underwriters  may resell the securities
from  time  to  time  in  one  or  more   transactions,   including   negotiated
transactions,  at a fixed public offering price or at varying prices  determined
at the time of sale.  Underwriters  may offer  securities  to the public  either
through underwriting syndicates represented by one or more managing underwriters
or directly by one or more firms  acting as  underwriters.  Unless we inform you
otherwise in the prospectus  supplement,  the obligations of the underwriters to
purchase  the  securities  will  be  subject  to  certain  conditions,  and  the
underwriters  will be obligated to purchase all the offered  securities  if they
purchase any of them. The  underwriters may change from time to time any initial
public  offering price and any discounts or concessions  allowed or reallowed or
paid to dealers.


     During and after an offering  through  underwriters,  the  underwriters may
purchase and sell the  securities  in the open market.  These  transactions  may
include  overallotment  and  stabilizing  transactions  and  purchases  to cover
syndicate  short  positions  created  in  connection  with  the  offering.   The
underwriters may also impose a penalty bid, which means that selling concessions
allowed to syndicate members or other  broker-dealers for the offered securities
sold  for  their  account  may be  reclaimed  by the  syndicate  if the  offered
securities  are   repurchased  by  the  syndicate  in  stabilizing  or  covering
transactions.  These activities may stabilize,  maintain or otherwise affect the
market price of the offered securities,  which may be higher than the price that
might otherwise prevail in the open market.  If commenced,  the underwriters may
discontinue these activities at any time.


     If we use dealers in the sale of securities, we will sell the securities to
them as  principals.  They may then  resell  those  securities  to the public at
varying prices determined by the dealers at the time of resale.


Direct Sales and Sales Through Agents


     We may sell the  securities  directly.  In this case,  no  underwriters  or
agents would be  involved.  We may sell  securities  upon the exercise of rights
that we may  issue  to our  securityholders.  We may also  sell  the  securities
directly  to  institutional  investors  or  others  who  may  be  deemed  to  be
underwriters  within the meaning of the  Securities Act with respect to any sale
of those securities.


     We may sell the  securities  through agents we designate from time to time.
Unless we inform you  otherwise  in the  prospectus  supplement,  any agent will
agree to use its reasonable best efforts to solicit  purchases for the period of
its appointment.


General Information


     Underwriters,  dealers and agents that  participate in the  distribution of
our securities  may be  underwriters  as defined in the Securities  Act, and any
discounts or commissions  they receive and any profit they make on the resale of
the offered securities may be treated as underwriting  discounts and commissions
under the  Securities  Act. Any  underwriters  or agents will be identified  and
their  compensation  described in a  prospectus  supplement.  We may  indemnify,
underwriters,  dealers and agents against certain civil  liabilities,  including
liabilities under the Securities Act, or make contributions to payments they may
be required to make relating to those  liabilities.  Our underwriters,  dealers,
and agents,  or their  affiliates,  may be customers of, engage in  transactions
with, or perform services for us in the ordinary course of business.


     Each series of securities  offered by this prospectus may be a new issue of
securities  with  no  established  trading  market.  Any  underwriters  to  whom
securities  offered by this  prospectus  are sold by us for public  offering and
sale may make a market in the  securities  offered by this  prospectus,  but the


                                       23


underwriters  will not be  obligated  to do so and may  discontinue  any  market
making at any time without notice. No assurance can be given as to the liquidity
of the trading market for any securities offered by this prospectus.


     Representatives  of the  underwriters  through whom our securities are sold
for  public  offering  and  sale  may  engage  in  over-allotment,   stabilizing
transactions,   syndicate  short  covering  transactions  and  penalty  bids  in
accordance  with  Regulation M under the Exchange Act.  Over-allotment  involves
syndicate sales in excess of the offering size,  which creates a syndicate short
position.   Stabilizing   transactions  permit  bids  to  purchase  the  offered
securities so long as the stabilizing bids do not exceed a specified maximum.


     Syndicate covering transactions involve purchases of the offered securities
in the open market after the  distribution  has been completed in order to cover
syndicate  short  positions.  Penalty  bids  permit  the  representative  of the
underwriters to reclaim a selling  concession  from a syndicate  member when the
offered  securities  originally sold by such syndicate member are purchased in a
syndicate  covering  transaction  to  cover  syndicate  short  positions.   Such
stabilizing  transactions,  syndicate covering transactions and penalty bids may
cause the price of the offered  securities to be higher than it would  otherwise
be in the absence of such transactions.  These transactions may be effected on a
national securities exchange and, if commenced, may be discontinued at any time.
Underwriters,  dealers and agents may be customers  of,  engage in  transactions
with or perform  services for, us and our subsidiaries in the ordinary course of
business.

                                  LEGAL MATTERS


     Certain legal matters in connection with the securities offered pursuant to
this  prospectus  will be passed upon by Jackson  Walker  L.L.P.,  San  Antonio,
Texas.  Underwriters,  dealers and  agents,  if any,  who we will  identify in a
prospectus supplement, may have their counsel pass upon certain legal matters in
connection with the securities offered by this prospectus.

                                     EXPERTS


     The  consolidated  financial  statements of Abraxas as of December 31, 2005
and  December 31, 2004 and for the years ended  December 31, 2005,  December 31,
2004 and December 31, 2003, included in this prospectus have been audited by BDO
Seidman, LLP, independent  registered public accounting firm, as stated in their
report  appearing  herein (which  report  expresses an  unqualified  opinion and
includes a paragraph referring to a change in accounting method),  and have been
so included in reliance upon the report of such firm given upon their  authority
as experts in accounting and auditing.


     The historical  reserve  information  prepared by DeGolyer and  MacNaughton
included  in this  prospectus  has been  included  herein in  reliance  upon the
authority  of such firm as experts  with  respect to matters  contained  in such
reserve reports.






                                       24

                                     PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS


Item 14.  Other Expenses of Issuance and Distribution


         The following statement sets forth the estimated amounts of expenses,
other than underwriting discounts, to be borne by us in connection with the
offering described in this Registration Statement:


Securities and Exchange Commission Registration Fee................$  16,050
Printing and Engraving Expenses....................................$   1,000
Accounting Fees and Expenses.......................................$  10,000
Legal Fees and Expenses............................................$  20,000
Listing Fee........................................................$  45,000
Miscellaneous Expenses.............................................$  25,000
                                                                   ---------


         Total Expenses.............................................$117,050
                                                                    ========


Item 15.  Indemnification of Directors and Officers


     Our  articles of  incorporation  contain a provision  that  eliminates  the
personal monetary liability of directors and officers to us and our stockholders
for a breach of  fiduciary  duties to the  extent  currently  allowed  under the
Nevada GCL. To the extent  certain  claims  against  directors  or officers  are
limited to equitable  remedies,  this provision of our articles of incorporation
may  reduce  the   likelihood  of  derivative   litigation  and  may  discourage
stockholders  or management  from  initiating  litigation  against  directors or
officers for breach of their duty of care. Additionally,  equitable remedies may
not be effective in many situations. If a stockholder's only remedy is to enjoin
the  completion  of the  Board  of  Director's  action,  this  remedy  would  be
ineffective  if the  stockholder  did not become aware of a transaction or event
until after it had been completed.  In such a situation,  it is possible that we
and our  stockholders  would have no effective  remedy  against the directors or
officers.


     Liability  for  monetary  damages  has  not  been  eliminated  for  acts or
omissions which involve intentional misconduct,  fraud or a knowing violation of
law or payment of an improper  dividend in  violation  of section  78.300 of the
Nevada  Statute.  The  limitation of liability  also does not eliminate or limit
director liability arising in connection with causes of action brought under the
Federal securities laws.


     The  Nevada  GCL  permits  a  corporation  to  indemnify  certain  persons,
including officers and directors, who are (or are threatened to be made) parties
against  all  expenses  (including  attorneys'  fees)  actually  and  reasonably
incurred by, or imposed upon,  him in  connection  with the defense by reason of
his being or having  been a director or officer if he acted in good faith and in
a manner  which  he  reasonably  believed  to be in or not  opposed  to the best
interests  of the  corporation  and,  with  respect  to any  criminal  action or
proceeding,  had no reasonable cause to believe his conduct was unlawful, except
where he has been  adjudged  by a court of  competent  jurisdiction  (and  after
exhaustion  of all  appeals)  to be  liable  for  gross  negligence  or  willful
misconduct in the performance of duty. Our bylaws provide indemnification to the
same extent allowed pursuant to the foregoing provisions of the Nevada GCL.


     Nevada  corporations  also are  authorized  to obtain  insurance to protect
officers and directors from certain liabilities,  including  liabilities against
which the corporation cannot indemnify its directors and officers.  We currently
have a directors' and officers'  liability  insurance policy in effect providing
$10.0 million in coverage and an additional $1.0 million in coverage for certain
employment related claims.


     We have entered into  indemnity  agreements  with each of our directors and
officers.  These agreements provide for  indemnification to the extent permitted
by the Nevada GCL.


Item 16.  Exhibits


     The  following  Exhibits  either  are  filed  as part of this  registration
statement or incorporated by reference to documents  previously filed or will be
filed by amendment.  Exhibit numbers correspond to the exhibits required by Item
601 of Regulation S-K.

                                      II-1


Exhibit..
Number        Description

1.1**         Form of Equity Underwriting Agreement.

1.2**         Form of Debt Underwriting Agreement.

3.1           Articles of  Incorporation  of  Abraxas.  (Filed as Exhibit 3.1 to
              Abraxas'  Registration  Statement on Form S-4, No.  33-36565  (the
              "S-4 Registration Statement")).

3.2           Articles of Amendment to the Articles of  Incorporation of Abraxas
              dated  October  22,  1990.  (Filed  as  Exhibit  3.3  to  the  S-4
              Registration Statement).

3.3           Articles of Amendment to the Articles of  Incorporation of Abraxas
              dated  December  18,  1990.  (Filed  as  Exhibit  3.4 to  the  S-4
              Registration Statement).

3.4           Articles of Amendment to the Articles of  Incorporation of Abraxas
              dated June 8, 1995. (Filed as Exhibit 3.4 to Abraxas' Registration
              Statement  on Form  S-3,  No.  333-00398  (the  "S-3  Registration
              Statement")).

3.5           Articles of Amendment to the Articles of  Incorporation of Abraxas
              dated as of August 12,  2000.  (Filed as Exhibit  3.5 to  Abraxas'
              Annual Report on Form 10-K filed April 2, 2001).

3.6           Amended and Restated  Bylaws of Abraxas.  (Filed as Exhibit 3.6 to
              Abraxas' Annual Report on Form 10-K filed April 5, 2002).

4.1           Specimen  Common Stock  Certificate of Abraxas.  (Filed as Exhibit
              4.1 to the S-4 Registration Statement).

4.2           Specimen Preferred Stock Certificate of Abraxas. (Filed as Exhibit
              4.2 to  Abraxas'  Annual  Report on Form  10-K  filed on March 31,
              1995).

4.3*          Form of Senior Indenture.

4.4*          Form of Subordinated Indenture.

5.1*          Opinion of Jackson Walker L.L.P.

12.1*         Statement regarding Computation of Ratios.

23.1*         Consent of BDO Seidman, LLP.

23.2*         Consent of DeGolyer and MacNaughton.

23.3*         Consent of Jackson Walker L.L.P. (Filed with Exhibit 5.1).

24.1*         Power of Attorney of Craig S. Bartlett, Jr.

24.2*         Power of Attorney of Franklin A. Burke.

24.3*         Power of Attorney of Harold D. Carter.

24.4*         Power of Attorney of Ralph F. Cox.

24.5*         Power of Attorney of Barry J. Galt.

24.6*         Power of Attorney of Dennis E. Logue.

24.7*         Power of Attorney of Paul A. Powell, Jr.

24.8*         Power of Attorney of Joseph A. Wagda.

25.1*         Statement  of  Eligibility  and  Qualification   under  the  Trust
              Indenture   Act  of  1939  for  the  Senior   Indenture   and  the
              Subordinated Indenture.


*    Filed herewith.
**   To be filed by amendment.


                                      II-2


Item 17.  Undertakings


         The undersigned registrants hereby undertake:


               (1) To file, during any period in which offers or sales are being
         made, a post-effective  amendment to this registration statement (other
         than as  provided in the  proviso  and  instructions  to Item 512(a) of
         Regulation  S-K):  (i) to include  any  prospectus  required by Section
         10(a)(3)  of the  Securities  Act  of  1933;  (ii)  to  reflect  in the
         prospectus  any facts or events arising after the effective date of the
         registration  statement  (or the most recent  post-effective  amendment
         thereof)  which,   individually  or  in  the  aggregate,   represent  a
         fundamental  change in the  information  set forth in the  registration
         statement.  Notwithstanding the foregoing,  any increase or decrease in
         volume of  securities  offered (if the total dollar value of securities
         offered would not exceed that which was  registered)  and any deviation
         from the low or high end of the estimated maximum offering range may be
         reflected in the form of prospectus filed with the Commission  pursuant
         to Rule  424(b) if, in the  aggregate,  the changes in volume and price
         represent  no more  than 20  percent  change in the  maximum  aggregate
         offering price set forth in the "Calculation of Registration Fee" table
         in the  effective  registration  statement;  and (iii) to  include  any
         material  information  with  respect  to the plan of  distribution  not
         previously  disclosed  in the  registration  statement  or any material
         change to such information in the registration statement;


               provided, however, that paragraphs (1)(i), (ii) and (iii) of this
         section do not apply if the  Registration  Statement is on Form S-3 and
         the information  required to be included in a post-effective  amendment
         by those  paragraphs is contained in reports filed with or furnished to
         the  Commission  by the  registrants  pursuant to Section 13 or Section
         15(d) of the Securities  Exchange Act of 1934 that are  incorporated by
         reference in the registration  statement,  or is contained in a form of
         prospectus   filed  pursuant  to  Rule  424(b)  that  is  part  of  the
         registration statement.


               (2) That, for the purpose of determining  any liability under the
         Securities Act of 1933,  each such  post-effective  amendment  shall be
         deemed to be a new  registration  statement  relating to the securities
         offered therein, and the offering of such securities at that time shall
         be deemed to be the initial bona fide offering thereof.


               (3) To  remove  from  registration  by means of a  post-effective
         amendment any of the securities being registered which remain unsold at
         the termination of the offering.


               (4) That,  for the  purpose of  determining  liability  under the
         Securities Act of 1933 to any  purchaser:  (i) if the  registrants  are
         relying  on Rule 430B:  (A) Each  prospectus  filed by the  registrants
         pursuant  to  Rule  424(b)(3)  shall  be  deemed  to  be  part  of  the
         Registration  Statement as of the date the filed  prospectus was deemed
         part of and  included  in the  Registration  Statement;  and  (B)  Each
         prospectus required to be filed pursuant to Rule 424(b)(2),  (b)(5), or
         (b)(7) as part of a  registration  statement  in  reliance on Rule 430B
         relating to an offering made pursuant to Rule  415(a)(1)(i),  (vii), or
         (x) for the purpose of providing  the  information  required by section
         10(a) of the  Securities  Act of 1933 shall be deemed to be part of and
         included in the  Registration  Statement  as of the earlier of the date
         such form of prospectus is first used after  effectiveness  or the date
         of the  first  contract  of  sale  of 314  securities  in the  offering
         described in the  prospectus.  As provided in Rule 430B,  for liability
         purposes  of the  issuer  and  any  person  that  is at  that  date  an
         underwriter,  such date shall be deemed to be a new  effective  date of
         the   Registration   Statement   relating  to  the  securities  in  the
         Registration  Statement  to  which  that  prospectus  relates,  and the
         offering  of such  securities  at that  time  shall be deemed to be the
         initial  bona  fide  offering  thereof.  Provided,   however,  that  no
         statement made in a registration  statement or prospectus  that is part
         of the  registration  statement or made in a document  incorporated  or
         deemed  incorporated  by reference into the  registration  statement or
         prospectus  that is part of the  registration  statement  will, as to a
         purchaser with a time of contract of sale prior to such effective date,
         supersede  or modify any  statement  that was made in the  registration
         statement or prospectus that was part of the registration  statement or
         made in any such document  immediately prior to such effective date; or
         (ii) if the registrants are subject to Rule 430C, each prospectus filed
         pursuant to Rule 424(b) as part of a registration statement relating to
         an offering, other than registration statements relying on Rule 430B or
         other than prospectuses filed in reliance on Rule 430A, shall be deemed
         to be part of and included in the registration statement as of the date
         it is first used after effectiveness. Provided, however, that no

                                      II-3



         statement made in a registration  statement or prospectus  that is part
         of the  registration  statement or made in a document  incorporated  or
         deemed  incorporated  by reference into the  registration  statement or
         prospectus  that is part of the  registration  statement  will, as to a
         purchaser  with a time of  contract  of sale  prior to such  first use,
         supersede  or modify any  statement  that was made in the  registration
         statement or prospectus that was part of the registration  statement or
         made in any such document immediately prior to such date of first use.


               (5)  That,  for  the  purpose  of  determining  liability  of the
         registrants  under the  Securities  Act of 1933 to any purchaser in the
         initial  distribution  of the securities:  The undersigned  registrants
         undertake that in a primary  offering of securities of the  undersigned
         registrants pursuant to this Registration Statement,  regardless of the
         underwriting  method used to sell the securities to the  purchaser,  if
         the securities are offered or sold to such purchaser by means of any of
         the following  communications,  the undersigned  registrants  will be a
         seller to the  purchaser  and will be  considered to offer or sell such
         securities  to  such  purchaser:  (i)  Any  preliminary  prospectus  or
         prospectus  of the  undersigned  registrants  relating to the  offering
         required  to be filed  pursuant  to Rule  424;  (ii)  Any free  writing
         prospectus  relating  to the  offering  prepared by or on behalf of the
         undersigned  registrants  or used  or  referred  to by the  undersigned
         registrants;  (iii) The  portion of any other free  writing  prospectus
         relating to the  offering  containing  material  information  about the
         undersigned registrants or their securities provided by or on behalf of
         the undersigned  registrants;  and (iv) Any other communication that is
         an offer in the offering  made by the  undersigned  registrants  to the
         purchaser.


               (6) That,  for purposes of  determining  any liability  under the
         Securities Act of 1933, each filing of the  registrants'  annual report
         pursuant to Section 13(a) or Section 15(d) of the  Securities  Exchange
         Act of 1934 (and, where applicable,  each filing of an employee benefit
         plan's  annual  report  pursuant  to  section  15(d) of the  Securities
         Exchange  Act  of  1934)  that  is  incorporated  by  reference  in the
         registration  statement  shall  be  deemed  to  be a  new  registration
         statement relating to the securities offered therein,  and the offering
         of such  securities at that time shall be deemed to be the initial bona
         fide offering thereof.


               (7) (i) For  purposes  of  determining  any  liability  under the
         Securities  Act of  1933,  the  information  omitted  from  the form of
         prospectus  filed as part of this  registration  statement  in reliance
         upon  Rule  430A and  contained  in a form of  prospectus  filed by the
         registrants  pursuant  to Rule  424(b)(1)  or (4) or  497(h)  under the
         Securities Act of 1933 shall be deemed to be part of this  registration
         statement as of the time it was declared effective.


               (ii) For the  purpose  of  determining  any  liability  under the
         Securities Act of 1933, each  post-effective  amendment that contains a
         form of prospectus shall be deemed to be a new  registration  statement
         relating to the securities  offered  therein,  and the offering of such
         securities  at that time  shall be deemed to be the  initial  bona fide
         offering thereof.


               (8)  The  undersigned  registrants  hereby  undertake  to file an
         application  for the  purpose of  determining  the  eligibility  of the
         trustee  to act  under  subsection  (a)  of  Section  310 of the  Trust
         Indenture  Act  ("Act") in  accordance  with the rules and  regulations
         prescribed by the Commission under Section 305(b)2 of the Act.


               (9) Insofar as indemnification  for liabilities arising under the
         Securities  Act of 1933 may be  permitted  to  directors,  officers and
         controlling  persons  of the  registrants,  the  registrants  have been
         advised that in the opinion of the Securities  and Exchange  Commission
         such  indemnification  is against public policy as expressed in the Act
         and  is,  therefore,  unenforceable.  In the  event  that a  claim  for
         indemnification against such liabilities (other than the payment by the
         registrants  of expenses  incurred  or paid by a  director,  officer or
         controlling  person of the registrants in the successful defense of any
         action,  suit or proceeding)  is asserted by such director,  officer or
         controlling  person in connection with the securities being registered,
         the registrants will, unless in the opinion of their counsel the matter
         has  been  settled  by  controlling  precedent,  submit  to a court  of
         appropriate  jurisdiction the question whether such  indemnification by
         it is  against  public  policy  as  expressed  in the Act  and  will be
         governed by the final adjudication of such issue.


                                      II-4



                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-3 and has  duly  caused  this  registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the City of San Antonio, State of Texas, on April 4, 2006.


                          ABRAXAS PETROLEUM CORPORATION
                          (Registrant)



                      By:      /s/ Robert L. G. Watson
                              --------------------------------------------
                              Robert L. G. Watson, Chairman of the Board,
                              President and Chief Executive Officer


                                      II-5

     Pursuant to the  requirements  of the  Securities  Act of 1933, as amended,
this  registration  statement  has been signed by the  following  persons in the
capacities and on the dates indicated:



Signature                             Name and Title                      Date
---------                             --------------                      ----
                                                                    
/s/ Robert L. G. Watson               Chairman of the Board, President,   April 4, 2006
--------------------------------      Chief Executive Officer
Robert L. G. Watson                   (Principal Executive Officer) and
                                      Director


/s/ Chris E. Williford                Executive Vice President,           April 4, 2006
--------------------------------      Treasurer, and Chief Financial
Chris E. Williford                    Officer (Principal Financial and
                                      Accounting Officer)


/s/ Craig S. Bartlett, Jr.*           Director                            April 4, 2006
--------------------------------
Craig S. Bartlett, Jr.

/s/ Franklin A. Burke*                Director                            April 4, 2006
--------------------------------
Franklin A. Burke

/s/ Harold D. Carter*                 Director                            April 4, 2006
--------------------------------
Harold D. Carter

/s/ Ralph F. Cox*                     Director                            April 4, 2006
--------------------------------
Ralph F. Cox

/s/ Barry J. Galt*                    Director                            April 4, 2006
--------------------------------
Barry J. Galt

/s/ Dennis E. Logue*                  Director                            April 4, 2006
--------------------------------
Dennis E. Logue

/s/ Paul A. Powell, Jr. *             Director                            April 4, 2006
--------------------------------
Paul A. Powell, Jr.

/s/ Joseph A. Wagda*                  Director                            April 4, 2006
--------------------------------
Joseph A. Wagda


* By:  Chris E. Williford, Attorney-in-Fact.



                                      II-6



                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-3 and has  duly  caused  this  registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the City of San Antonio, Texas, on April 4, 2006.




                           EASTSIDE COAL COMPANY, INC.


                           By:  /s/ Robert L.G. Watson
                               ---------------------------------------
                               President



                                      II-7


     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
registration  statement  has been signed below by the  following  persons in the
capacities and on the date indicated.




Signature                    Name and Title                      Date
---------                    --------------                      ----

/s/ Robert L.G. Watson       President (Principal Executive      April 4, 2006
---------------------------  Officer) and Director of
Robert L.G. Watson           Eastside Coal Company, Inc.



/s/ Chris E. Williford       Vice President (Principal           April 4, 2006
---------------------------  Accounting Officer) and
Chris E. Williford           Director of Eastside Coal
                             Company, Inc.




                                      II-8

                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-3 and has  duly  caused  this  registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the City of San Antonio, Texas, on April 4, 2006.




                          SANDIA OIL & GAS CORPORATION


                          By:  /s/ Robert L.G. Watson
                              -----------------------------------
                              President



                                      II-9




     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
registration  statement  has been signed below by the  following  persons in the
capacities and on the date indicated.




Signature                        Name and Title                      Date
---------                        --------------                      ----
/s/ Robert L.G. Watson           President                         April 4, 2006
---------------------------      (Principal Executive Officer)
Robert L.G. Watson               and Director of Sandia Oil
                                 & Gas Corporation

/s/ Chris E. Williford           Vice President                    April 4, 2006
---------------------------      (Principal Financial
Chris E. Williford               and Accounting Officer)
                                 and Director of Sandia Oil
                                 &Gas Corporation


                                      II-10


                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-3 and has  duly  caused  this  registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the City of San Antonio, Texas, on April 4, 2006.




                                    SANDIA OPERATING CORP.


                                    By:  /s/ Robert L.G. Watson
                                         ---------------------------------------
                                        President



                                      II-11



     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
registration  statement  has been signed below by the  following  persons in the
capacities and on the date indicated.




Signature                      Name and Title                      Date
---------                      --------------                      ----

/s/ Robert L.G. Watson         President (Principal Executive
--------------------------     Officer) and Director of
Robert L.G. Watso              Sandia Operating Corp.          April 4, 2006


/s/ Chris E. Williford         Vice President (Principal        April 4, 2006
--------------------------     Financial and Accounting
Chris E. Williford             Officer) and Director of Sandia
                               Operating Corp.




                                     II-12


                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-3 and has  duly  caused  this  registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the City of San Antonio, Texas, on April 4, 2006.




                            WAMSUTTER HOLDINGS, INC.


                            By:  /s/ Robert L.G. Watson
                                 ---------------------------------------
                                 President



                                     II-13



     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
registration  statement  has been signed below by the  following  persons in the
capacities and on the date indicated.




Signature                      Name and Title                      Date
---------                      --------------                      ----

/s/ Robert L.G. Watson         President (Principal Executive    April 4, 2006
-------------------------      Officer) and Director of
Robert L.G. Watson             Wamsutter


/s/ Chris E. Williford         Vice President (Principal         April 4, 2006
-------------------------      Financial and Accounting
Chris E. Williford             Officer) and Director of Wamsutter



                                     II-14


                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-3 and has  duly  caused  this  registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the City of San Antonio, Texas, on April 4, 2006.




                             WESTERN ASSOCIATED ENERGY CORPORATION


                             By:  /s/ Robert L.G. Watson
                                  ---------------------------------------
                                  President


                                     II-15


     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
registration  statement  has been signed below by the  following  persons in the
capacities and on the date indicated.




Signature                         Name and Title                      Date
---------                         --------------                      ----

/s/ Robert L.G. Watson            President (Principal Executive   April 4, 2006
---------------------------       Officer) and Director of
Robert L.G. Watson                Western Associated Energy
                                  Corporation



/s/ Chris E. Williford            Vice President (Principal        April 4, 2006
---------------------------       Accounting Officer) and
Chris E. Williford                Director of Western Associated
                                  Energy Corporation




                                     II-16


                                  EXHIBIT INDEX

Exhibit
Number        Description

1.1**         Form of Equity Underwriting Agreement.

1.2**         Form of Debt Underwriting Agreement.

3.1           Articles of  Incorporation  of  Abraxas.  (Filed as Exhibit 3.1 to
              Abraxas'  Registration  Statement on Form S-4, No.  33-36565  (the
              "S-4 Registration Statement")).

3.2           Articles of Amendment to the Articles of  Incorporation of Abraxas
              dated  October  22,  1990.  (Filed  as  Exhibit  3.3  to  the  S-4
              Registration Statement).

3.3           Articles of Amendment to the Articles of  Incorporation of Abraxas
              dated  December  18,  1990.  (Filed  as  Exhibit  3.4 to  the  S-4
              Registration Statement).

3.4           Articles of Amendment to the Articles of  Incorporation of Abraxas
              dated June 8, 1995. (Filed as Exhibit 3.4 to Abraxas' Registration
              Statement  on Form  S-3,  No.  333-00398  (the  "S-3  Registration
              Statement")).

3.5           Articles of Amendment to the Articles of  Incorporation of Abraxas
              dated as of August 12,  2000.  (Filed as Exhibit  3.5 to  Abraxas'
              Annual Report on Form 10-K filed April 2, 2001).

3.6           Amended and Restated  Bylaws of Abraxas.  (Filed as Exhibit 3.6 to
              Abraxas' Annual Report on Form 10-K filed April 5, 2002).

4.1           Specimen  Common Stock  Certificate of Abraxas.  (Filed as Exhibit
              4.1 to the S-4 Registration Statement).

4.2           Specimen Preferred Stock Certificate of Abraxas. (Filed as Exhibit
              4.2 to  Abraxas'  Annual  Report on Form  10-K  filed on March 31,
              1995).

4.3*          Form of Senior Indenture.

4.4*          Form of Subordinated Indenture.

5.1*          Opinion of Jackson Walker L.L.P.

12.1*         Statement regarding Computation of Ratios.

23.1*         Consent of BDO Seidman, LLP.

23.2*         Consent of DeGolyer and MacNaughton.

23.3*         Consent of Jackson Walker L.L.P. (Filed with Exhibit 5.1).

24.1*         Power of Attorney of Craig S. Bartlett, Jr.

24.2*         Power of Attorney of Franklin A. Burke.

24.3*         Power of Attorney of Harold D. Carter.

24.4*         Power of Attorney of Ralph F. Cox.

24.5*         Power of Attorney of Barry J. Galt.

24.6*         Power of Attorney of Dennis E. Logue.

24.7*         Power of Attorney of Paul A. Powell, Jr.

24.8*         Power of Attorney of Joseph A. Wagda.

25.1*         Statement  of  Eligibility  and  Qualification   under  the  Trust
              Indenture   Act  of  1939  for  the  Senior   Indenture   and  the
              Subordinated Indenture.


*    Filed herewith.
**   To be filed by amendment.


                                     II-17