ABRAXAS PETROLEUM CORP
S-4, 1998-04-09
CRUDE PETROLEUM & NATURAL GAS
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                                   COX & SMITH
                             I N C O R P O R A T E D
                              ATTORNEYS COUNSELORS



                              112 East Pecan Street
                                   Suite 1800
                          San Antonio, Texas 78205-1521
                                 (210) 554-5500
                               Fax (210) 226-8395



Writer's Direct Number                             Writer's E-Mail Address
(210) 554-5255                                      [email protected]

                                  April 9, 1998



Securities and Exchange Commission
Judiciary Plaza
450 Fifth Street, N.W.
Washington, D.C.  20549

                         Re:   Registration  Statement  on Form S-4 for  Abraxas
                               Petroleum   Corporation   and  Canadian   Abraxas
                               Petroleum Limited

Ladies and Gentlemen:

        On  behalf  of  Abraxas  Petroleum   Corporation  and  Canadian  Abraxas
Petroleum  Limited,  this  letter  accompanies  the  filing of the  Registration
Statement  on Form S-4 under the  Securities  Act of 1933,  as amended,  for the
registration  of  $275,000,000  Senior  Notes  due  2004  of  Abraxas  Petroleum
Corporation and Canadian Abraxas Petroleum Limited.

        As required  under the EDGAR  rules,  a paper copy of the Form S-4 is on
file with Abraxas' and Canadian Abraxas' office of the secretary.

        The filing fee of $81,125 has been wire transferred to the SEC's account
at Mellon Bank.

        Please direct any communication regarding this filing to the undersigned
at (210) 554-5255 or to Tobin E. Olson of this Firm at (210) 554-5298.

                                            Yours very truly,


                                            /s/ Steven R. Jacobs
                                            Steven R. Jacobs

SRJ/lrk/0148371.02




<PAGE>


                               
As filed with the Securities and Exchange Commission on April 9, 1998

                                                    Registration No. 333-_____

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM S-4
                             REGISTRATION STATEMENT
                                      Under
                           THE SECURITIES ACT OF 1933

                          ABRAXAS PETROLEUM CORPORATION
                       CANADIAN ABRAXAS PETROLEUM LIMITED
             (Exact name of registrant as specified in the charter)

Nevada                             1331                            74-2584033
Canada                             1331                               N/A
(State or other jurisdiction of  (Primary Standard Industrial  (I.R.S. Employer
incorporation or organization)    Classification Code           Identification 
                                  Number)                       Number)
                
                                                    Robert L. G. Watson
           500 North Loop 1604 East              500 North Loop 1604 East
                   Suite 100                             Suite 100
           San Antonio, Texas 78232              San Antonio, Texas 78232
                (210) 490-4788                       (210) 490-4788

  (Address,  including zip code, and       (Address, including zip code, and
   telephone number including area code,    telephone number, including area
   of registrant's principal executive      code, of agent for service)
                  offices)                              

                                   Copies to:

                            Cox & Smith Incorporated
                         112 E. Pecan Street, Suite 1800
                            San Antonio, Texas 78205
                                 (210) 554-5500
                           Attention: Steven R. Jacobs

        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon
as practicable after this Registration Statement becomes effective.

        If the  securities  being  registered  on this Form are being offered in
connection  with the formation of a holding company and there is compliance with
General Instruction G, check the following box.

                               CALCULATION OF REGISTRATION FEE

 TITLE OF EACH                     PROPOSED        PROPOSED       
  CLASS OF                          MAXIMUM         MAXIMUM         AMOUNT OF
SECURITIES TO BE  AMOUNT TO BE   OFFERING PRICE    AGGREGATE       REGISTRATION
  REGISTERED       REGISTERED      PER UNIT      OFFERING PRICE        FEE
11 1/2 % Senior
Notes Due 2004,   $275,000,000      100%           $275,000,000     $81,125.00
Series D

Guarantees            -              -                  -              -
<PAGE>

        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.

                                       ii
<PAGE>


                              CROSS REFERENCE SHEET
                    PURSUANT TO ITEM 501(B) OF REGULATION S-K
                  SHOWING LOCATION IN PROSPECTUS OF INFORMATION
                     REQUIRED BY ITEMS OF PART I OF FORM S-4

          REGISTRATION STATEMENT ITEM OF FORM S-4          CAPTION OR LOCATION

1.    Forepart of  Registration  Statement and Outside   Outside Front Cover
      Front Cover Page of Prospectus

2.    Inside Front and Outside Back Cover Pages of       Inside Front; Outside 
      Prospectus                                         Back Cover Page;
                                                         AvailableInformation;
                                                         Enforceability of 
                                                         Civil  Liabilities
                                                         Against Foreign Persons

3.    Risk Factors, Ratio of Earnings to Fixed           Summary; Risk Factors;
      Charges and Other Information                      Selected Consolidated
                                                         Financial Data

4.    Terms of the Transaction                           Outside Front Cover
                                                         Page; Summary; The
                                                         Exchange  Offer;
                                                         Description of the
                                                         Exchange Notes; Certain
                                                         United States and 
                                                         Canadian Income Tax
                                                         Considerations

5.    Pro Forma Financial Information                    Inapplicable

6.    Material Contacts with the Company
      Being Acquired                                     Inapplicable

7.    Additional Information Required for                Inapplicable 
      Reoffering by Persons and Parties
      Deemed to Be Underwriters

8.    Interests of Named Experts and Counsel             Legal Matters; Experts

9.    Disclosure of Commission Position on               Inapplicable
      Indemnification for Securities Act
      Liabilities

10.   Information with Respect to S-3 Registrants        Inapplicable

11.   Incorporation of Certain Information by Reference  Inapplicable

12.   Information with Respect to S-2 or S-3 Registrants Inapplicable

13.   Incorporation of Certain Information by Reference  Inapplicable

14.   Information with Respect to Registrants Other      Business; Consolidated
      than S-3 or S-2 Registrants                        Financial Statements;
                                                         Selected Consolidated
                                                         Financial Data;
                                                         Management's Discussion
                                                         and Analysis of 
                                                         Financial Condition and
                                                         Results of Operation;
                                                         Description of Existing
                                                         Indebtedness

15.   Information with Respect to S-3 Companies          Inapplicable

                                      iii
<PAGE>

16.   Information with Respect to S-2 or S-3 Companies   Inapplicable

17.   Information with Respect to Companies Other        Inapplicable 
      than S-2 or S-3 Companies

18.   Information if Proxies, Consents or                Inapplicable
      Authorizations are to be Solicited

19.   Information if Proxies, Consents or                Management; Securities
      Authorizations are not to be Solicited             Holdings of Principal
      or in an Exchange Offer                            Stockholders, Directors
                                                         and Officers; Certain
                                                         Transactions

                                       iv
<PAGE>




                   SUBJECT TO COMPLETION, DATED APRIL 9, 1998

PROSPECTUS
                          ABRAXAS PETROLEUM CORPORATION
                       CANADIAN ABRAXAS PETROLEUM LIMITED
            OFFER TO EXCHANGE 11 1/2% SENIOR NOTES DUE 2004, SERIES D
                   FOR ANY AND ALL OUTSTANDING 11 1/2% SENIOR
                      NOTES DUE 2004, SERIES B AND SERIES C

              THE EXCHANGE OFFER WILL EXPIRE AT 5:00 P.M., NEW YORK
                  CITY TIME, ON ________________, 1998, UNLESS
                                    EXTENDED.

        Abraxas Petroleum  Corporation,  a Nevada corporation  ("Abraxas"),  and
Canadian Abraxas Petroleum Limited, an Alberta  corporation  ("Canadian Abraxas"
and, together with Abraxas, the "Issuers"), hereby offer (the "Exchange Offer"),
upon the terms and conditions set forth in this  Prospectus  (the  "Prospectus")
and the  accompanying  Letter of Transmittal (the "Letter of  Transmittal"),  to
exchange $1,000 principal amount of their 11 1/2% Senior Notes due 2004,  Series
D (the "Exchange Notes"), which have been registered under the Securities Act of
1933, as amended (the "Securities  Act"),  pursuant to a Registration  Statement
(the  "Registration  Statement")  of which this  Prospectus is a part,  for each
$1,000  principal  amount of their  outstanding  11 1/2% Senior  Notes due 2004,
Series B (the  "Series B  Notes"),  of which  $215,000,000  principal  amount is
outstanding,  and for each $1,000 principal amount of their  outstanding 11 1/2%
Senior  Notes due 2004,  Series C (the "Series C Notes"),  of which  $60,000,000
principal  amount  is  outstanding.  The form and terms of the  Exchange  Notes,
except for the total outstanding  principal amount thereof, are the same (in all
material  respects)  as the form and  terms of the  Series B Notes  (which  they
replace)  except that the Exchange Notes will bear a Series D  designation.  The
form and terms of the Exchange Notes, except for the total outstanding principal
amount thereof,  are the same as the form and terms of the Series C Notes (which
they  replace)  except  that  (i)  the  Exchange  Notes  will  bear a  Series  D
designation,  (ii) the  Exchange  Notes  will  have  been  registered  under the
Securities Act and, therefore,  will not bear legends restricting their transfer
and will not be subject to certain  provisions  relating  to an  increase in the
interest  rate  which  were   applicable  to  the  Series  C  Notes  in  certain
circumstances  relating to the timing of the Exchange Offer and (iii) holders of
the  Exchange  Notes will not be  entitled  to certain  rights of holders of the
Series C Notes under the  Registration  Rights  Agreement  (as defined  herein),
which  rights will  terminate  upon  consummation  of the  Exchange  Offer.  The
Exchange  Notes will evidence the same debt as the Series B Notes and the Series
C Notes (each of which they replace) and will be issued under and be entitled to
the benefits of the Indenture dated January 27, 1998 (the "Indenture") among the
Issuers and IBJ Schroder Bank & Trust  Company  governing the Series C Notes and
the  Exchange  Notes.  As used herein,  the term "Notes"  refers to the Series B
Notes,  the Series C Notes and the Exchange Notes.  See "The Exchange Offer" and
"Description of the Exchange Notes."

        Interest on the Exchange Notes will be payable  semi-annually in arrears
on May 1 and November 1 of each year,  commencing on May 1, 1998, at the rate of
11 1/2% per annum.  Interest  will accrue from  November 1, 1997 with respect to
the Series B Notes (the date of the most recent interest payment on the Series B
Notes) and  January 27,  1998 (the  "Issue  Date") with  respect to the Series C
Notes.  The Exchange  Notes will mature on November 1, 2004.  The Exchange Notes
will be  redeemable,  in whole or in part,  at the option of the Issuers,  on or
after November 1, 2000, at the redemption prices set forth herein,  plus accrued
and unpaid  interest to the date of redemption.  In addition,  at any time on or
prior to November 1, 1999, the Issuers may, at their option, redeem up to 35% of
the aggregate principal amount of the Series C Notes and Exchange Notes with the
net cash  proceeds of one or more Equity  Offerings  (as defined  herein),  at a
redemption  price  equal to  111.5%  of the  aggregate  principal  amount of the
Exchange Notes to be redeemed,  plus accrued and unpaid  interest to the date of
redemption; provided, however, that, after giving effect to any such redemption,
at least  65% of the  aggregate  principal  amount  of the  Series  C Notes  and
Exchange  Notes  remains  outstanding.  Upon a Change  of  Control  (as  defined
herein),  each holder of the  Exchange  Notes will have the right to require the
Issuers to  repurchase  all or a portion of such  holder's  Exchange  Notes at a
redemption price equal to 101% of the principal amount thereof, plus accrued and
unpaid  interest to the date of  repurchase.  In  addition,  the Issuers will be
obligated to offer to  repurchase  the Exchange  Notes at 100% of the  principal
amount thereof plus accrued and unpaid interest to the date of repurchase in the
event of certain asset sales. See "Description of the Exchange Notes."
<PAGE>

        The Exchange Notes will be general unsecured  obligations of the Issuers
and will rank pari passu in right of payment to all existing  and future  senior
indebtedness  of the  Issuers  and  senior  in right of  payment  to all  future
subordinated  indebtedness  of the Issuers and on parity with any Series B Notes
and  Series  C Notes  not  exchanged.  The  Exchange  Notes  will,  however,  be
effectively subordinated to secured indebtedness of the Issuers to the extent of
the value of the assets  securing such  indebtedness.  See  "Description  of the
Exchange Notes." Abraxas has an existing credit facility (the "Credit Facility")
with Bankers Trust Company  ("BTCo") and ING (U.S.)  Capital  Corporation  ("ING
Capital")  which is secured  by certain  assets of  Abraxas  and  guaranteed  by
Canadian Abraxas and is to be secured by certain assets of Canadian Abraxas. The
Credit Facility has an availability of $40.0 million.  At March 31, 1998,  there
was $100,000  outstanding  under the Credit Facility.  The Indenture permits the
Issuers  and  their  subsidiaries  to incur  additional  indebtedness  including
additional secured indebtedness,  under certain conditions. See "Risk Factors --
Ranking of  Indebtedness"  and  "Description  of the  Exchange  Notes -- Certain
Covenants -- Limitation on Incurrence of Additional  Indebtedness." The Exchange
Notes will be jointly and severally guaranteed by certain of the Issuers' future
subsidiaries (the "Subsidiary  Guarantors").  The Guarantees (as defined herein)
will be general unsecured obligations of the Subsidiary Guarantors and will rank
pari  passu in right of payment to all  senior  indebtedness  of the  Subsidiary
Guarantors and senior in right of payment to all  subordinated  indebtedness  of
the Subsidiary  Guarantors.  The Guarantees will be effectively  subordinated to
secured indebtedness of the Subsidiary  Guarantors to the extent of the value of
the assets securing such indebtedness.  See "Description of the Exchange Notes."
At March 31, 1998,  the Issuers and the  Subsidiary  Guarantors  had $100,000 of
secured indebtedness outstanding.

        The  Issuers  will  accept for  exchange  any and all Series B Notes and
Series C Notes validly  tendered and not withdrawn  prior to 5:00 p.m., New York
City time, on  __________,  1998,  unless  extended by the Issuers in their sole
discretion (the "Expiration  Date").  Tenders of the Series B Notes and Series C
Notes may be  withdrawn at any time prior to 5:00 p.m. on the  Expiration  Date.
The  Exchange  Offer is subject to certain  customary  conditions.  The Exchange
Notes are being  offered  hereunder in order to satisfy the  obligations  of the
Issuers under the Registration  Rights Agreement entered into by the Issuers and
Jefferies & Company,  Inc. (the  "Initial  Purchaser")  in  connection  with the
offering of the Series C Notes (the "Offering"). See "The Exchange Offer."

        Based on an  interpretation  by the staff of the Securities and Exchange
Commission  (the  "Commission")  set forth in no-action  letters issued to third
parties,  the Issuers  believe  that the Exchange  Notes issued  pursuant to the
Exchange  Offer may be offered for resale,  resold and otherwise  transferred by
any holder  thereof (other than any such holder that is an "affiliate" of either
of the  Issuers  within the  meaning of Rule 405 under the  Securities  Act or a
broker-dealer  who purchased the Series B Notes or Series C Notes  directly from
the  Issuers  for resale  pursuant  to Rule 144A or another  exemption  from the
Securities Act) without compliance with the registration and prospectus delivery
provisions of the Securities Act, provided that such Exchange Notes are acquired
in the  ordinary  course  of such  holder's  business  and  such  holder  has no
arrangement or understanding  with any person to participate in the distribution
of such Exchange Notes.  See "Purpose of the Exchange Offer" and " Resale of the
Exchange Notes." Each broker-dealer that receives the Exchange Notes for its own
account pursuant to the Exchange Offer (a  "Participating  Broker-Dealer")  must
acknowledge  that it will deliver a prospectus in connection  with any resale of
such Exchange Notes.  The Letter of Transmittal  states that by so acknowledging
and by delivering a prospectus, a participating Broker-Dealer will not be deemed
to admit that it is an  "underwriter"  within the meaning of the Securities Act.
This Prospectus,  as it may be amended or supplemented from time to time, may be
used by a Participating Broker-Dealer in connection with resales of the Exchange
Notes  received in exchange for the Series B Notes and Series C Notes where such
Series  B  Notes  and  Series  C  Notes  were  acquired  by  such  Participating
Broker-Dealer  as  a  result  of  market-making   activities  or  other  trading
activities.  The Issuers agreed that they will make this Prospectus available to
any  Participating  Broker-Dealer  for use in  connection  with any such  resale
during the period required by the Securities Act. See "Plan of Distribution."

        There has not  previously  been any public market for the Series B Notes
or Series C Notes or the Exchange  Notes.  The Issuers do not intend to list the
Exchange  Notes on any  securities  exchange or to seek  approval for  quotation
through any automated quotation system. There can be no assurance that an active
market for the Exchange Notes will develop.  See "Risk Factors -- Lack of Public
Market." Moreover,  to the extent that the Series B Notes and the Series C Notes


                                       2
<PAGE>

are  tendered  and  accepted  in the  Exchange  Offer,  the  trading  market for
untendered and tendered but  unaccepted  Series B Notes and Series C Notes could
be adversely affected.

        The Exchange Notes will be available  initially only in book-entry form.
The Issuers expect that the Exchange Notes issued pursuant to the Exchange Offer
will be issued in the form of a Global  Certificate (as defined  herein),  which
will be  deposited  with,  or on behalf of, The  Depository  Trust  Company (the
"Depositary"  or "DTC") and registered in its name or in the name of Cede & Co.,
its nominee.  Beneficial  interests in the Global  Certificate  representing the
Exchange   Notes  will  be  shown  on,  and   transfers   thereof  to  qualified
institutional  buyers  will  be  affected  through,  records  maintained  by the
Depositary  and its  participants.  After the  initial  issuance  of the  Global
Certificate, the Exchange Notes in certified form will be issued in exchange for
the  Global  Certificate  only on the  terms  set  forth in the  Indenture.  See
"Book-Entry; Delivery and Form."

        Holders  of the  Series B Notes  and  Series C Notes  not  tendered  and
accepted  in the  Exchange  Offer will  continue to hold such Series B Notes and
Series C Notes and will be entitled to all of the rights and  benefits  and will
be subject to the  limitations  applicable  thereto under the Indenture and with
respect to transfer under the  Securities  Act. The Issuers will not receive any
proceeds from the Exchange Offer. Pursuant to the Registration Rights Agreement,
the Issuers will pay all the expenses  incurred by them incident to the Exchange
Offer. See "The Exchange Offer."

        SEE "RISK  FACTORS" ON P. 11 FOR A  DESCRIPTION  OF CERTAIN  RISKS TO BE
CONSIDERED  BY HOLDERS WHO TENDER  THEIR SERIES B NOTES NOTES AND SERIES C NOTES
IN THE EXCHANGE OFFER.

        THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
AND  EXCHANGE  COMMISSION  OR  ANY  STATE  SECURITIES  COMMISSION  NOR  HAS  THE
COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED  UPON THE  ACCURACY  OR
ADEQUACY OF THIS PROSPECTUS.  ANY  REPRESENTATION  TO THE CONTRARY IS A CRIMINAL
OFFENSE.

        The date of this Prospectus is ______________, 1998.

        INFORMATION  CONTAINED  HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT.  A
REGISTRATION  STATEMENT  RELATING  TO THESE  SECURITIES  HAS BEEN FILED WITH THE
SECURITIES  AND EXCHANGE  COMMISSION.  THESE  SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION  STATEMENT  BECOMES
EFFECTIVE.  THIS  PROSPECTUS  SHALL  NOT  CONSTITUTE  AN  OFFER  TO  SELL OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE  SECURITIES
IN ANY STATE IN WHICH SUCH OFFER,  SOLICITATION  OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.

                                       3
<PAGE>

 
                DISCLOSURE REGARDING FORWARD-LOOKING INFORMATION

        This Prospectus includes "forward-looking statements" within the meaning
of Section 27A of the  Securities  Act and Section 21E of the Exchange  Act. All
statements   other  than  statements  of  historical   facts  included  in  this
Prospectus,   including,   without  limitation,  those  regarding  the  Issuers'
financial position, business strategy,  budgets, reserve estimates,  development
and exploitation opportunities and projects,  behind-pipe zones,  classification
of reserves, projected costs, potential reserves, availability or sufficiency of
capital resources and plans and objectives of management for future  operations,
are   forward-looking   statements.   Although  the  Issuers  believe  that  the
expectations reflected in such forward-looking  statements are reasonable,  they
can give no assurance  that such  expectations  will prove to have been correct.
Important  factors that could cause actual results to differ materially from the
Issuers'  expectations  ("Cautionary  Statements")  are  disclosed  under  "Risk
Factors" and elsewhere in this  Prospectus  including,  without  limitation,  in
conjunction with the forward-looking statements included in this Prospectus. All
subsequent written and oral forward-looking statements attributable to either of
the  Issuers,  or  persons  acting on behalf  of either of them,  are  expressly
qualified in their entirety by the Cautionary Statements.

                        NOTICE TO NEW HAMPSHIRE RESIDENTS

        NEITHER THE FACT THAT A REGISTRATION  STATEMENT OR AN APPLICATION  FOR A
LICENSE HAS BEEN FILED UNDER THIS  CHAPTER WITH THE STATE OF NEW  HAMPSHIRE  NOR
THE FACT THAT A SECURITY IS  EFFECTIVELY  REGISTERED  OR A PERSON IS LICENSED IN
THE STATE OF NEW HAMPSHIRE  CONSTITUTES A FINDING BY THE SECRETARY OF STATE THAT
ANY DOCUMENT FILED UNDER RSA 421-B IS TRUE, COMPLETE AND NOT MISLEADING. NEITHER
ANY SUCH FACT NOR THE FACT THAT AN EXEMPTION  OR  EXCEPTION  IS AVAILABLE  FOR A
SECURITY OR A  TRANSACTION  MEANS THAT THE  SECRETARY OF STATE HAS PASSED IN ANY
WAY UPON THE MERITS OR  QUALIFICATIONS  OF, OR RECOMMENDED OR GIVEN APPROVAL TO,
ANY PERSON,  SECURITY,  OR  TRANSACTION.  IT IS UNLAWFUL TO MAKE, OR CAUSE TO BE
MADE,  TO ANY  PROSPECTIVE  PURCHASER,  CUSTOMER,  OR CLIENT ANY  REPRESENTATION
INCONSISTENT WITH THE PROVISIONS OF THIS PARAGRAPH.

                                       4
<PAGE>

                                     SUMMARY

        The following  summary is qualified in its entirety by the more detailed
information  and financial  statements,  including the notes thereto,  appearing
elsewhere in this  Prospectus.  As used in this  Prospectus,  the term "Abraxas"
refers to Abraxas Petroleum  Corporation,  the term "Canadian Abraxas" refers to
Canadian Abraxas  Petroleum Limited and the term "Company" refers to Abraxas and
all of its  subsidiaries,  including  Canadian  Abraxas,  for the relevant  time
periods.  Except as otherwise  noted,  the reserve data for Abraxas and Canadian
Abraxas  reported  in this  Prospectus  are based on the  reserve  estimates  of
Abraxas' and Canadian Abraxas' respective  independent petroleum engineers.  See
"Glossary of Terms" for definitions of certain terms used in this Prospectus.

                                   The Company

        The Company is an independent  energy company  engaged  primarily in the
acquisition,  exploration,  development  and production of crude oil and natural
gas.  Since January 1, 1991,  the Company's  principal  means of growth has been
through the acquisition and subsequent development and exploitation of producing
properties and related assets.  The Company  utilizes a disciplined  acquisition
strategy,  focusing  its efforts on  producing  properties  and  related  assets
possessing  the  following  characteristics:   a  concentration  of  operations;
significant,  quantifiable  development  potential;  historically  low operating
expenses; and the potential to reduce G&A expenses per BOE. The Company seeks to
complement   its   acquisition   and   development   activities  by  selectively
participating in exploration  projects with experienced  industry partners.  The
Company's   principal   areas  of  operation  are  Texas,   western  Canada  and
southwestern Wyoming. The Company owns interests in 706,605 gross acres (445,955
net acres) and 763.0 gross wells (404.7 net wells), 341 of which are operated by
the  Company,  and  varying  interests  in 20 natural gas  processing  plants or
compression facilities.

        Since December 31, 1990, the Company has made 17  acquisitions  of crude
oil and natural gas properties  totaling an estimated  52,100 MBOE at an average
acquisition  cost of $4.11 per BOE.  From  January 1, 1991 to December 31, 1997,
the Company's  estimated total proved reserves increased from 889 MBOE to 54,700
MBOE;  aggregate  PV-10  increased  from $11.0  million to $268.7  million;  and
average net daily production  increased from 0.141 MBOE per day to 14.9 MBOE per
day.

        The Company was founded in 1977 by Robert  L.G.  Watson,  the  Company's
Chairman of the Board,  President and Chief Executive Officer.  Canadian Abraxas
was formed by the Company in 1996 to acquire CGGS Canadian Gas Gathering Systems
Inc.  ("CGGS").  The Company's  principal  offices are located at 500 North Loop
1604 East, Suite 100, San Antonio, Texas 78232 and its telephone number is (210)
490-4788.  Canadian Abraxas'  principal offices are located at 300 - 5th Avenue,
12th Floor, Calgary, Alberta and its telephone number is (403) 262-1949.

                                  Risk Factors

        See "Risk  Factors" for a discussion  of certain  factors that should be
considered in evaluating an investment in the Exchange Notes.

                                       5
<PAGE>



                          PURPOSE OF THE EXCHANGE OFFER

        The Exchange Offer  provides  holders of the Series B Notes and Series C
Notes with the Exchange Notes which will generally be freely transferable by the
holders thereof  without  registration  or any prospectus  delivery  requirement
under the Securities Act. The Issuers' purpose in engaging in the Exchange Offer
is to provide  holders of the Series B Notes and the Series C Notes with  freely
transferable  securities and to comply with the  provisions of the  Registration
Rights Agreement which require, subject to certain conditions, that the Exchange
Offer be made. See "Purpose of the Exchange Offer".

                                      THE EXCHANGE OFFER

Exchange Ratio                  Each  Series  B Note  and  Series  C  Note  is
                                exchangeable  for a like  principal  amount of
                                Exchange Notes.

                                Expiration  Date 5:00 p.m.,  New York City time,
                                on __________,  1998 unless  extended,  in which
                                case the term "Expiration Date" means the latest
                                date and time to which the Exchange  Offer shall
                                have been extended.

 
Principal Amount of Exchange    Subject  to  the  terms  and  conditions  of the
 Notes                          Exchange  Offer,  any and all Series B Notes and
                                Series C Notes will be accepted if duly tendered
                                and not withdrawn  prior to acceptance  thereof.
                                The Exchange Offer is not  conditioned  upon any
                                minimum  principal  amount of the Series B Notes
                                and Series C Notes being tendered. The Indenture
                                limits  the  aggregate  amount  of the  Series C
                                Notes  and  the  Exchange  Notes  which  may  be
                                outstanding to $275.0 million  principal amount,
                                $215.0 million of which is currently in the form
                                of the Series B Notes and $60.0 million of which
                                is currently in the form of the Series C Notes.

Conditions of the Exchange      The  Issuers'   obligation  to  consummate   the
 Offer                          Exchange Offer is subject to certain conditions.
                                See "The Exchange Offer -- Conditions."  Tenders
                                of the  Series B Notes and Series C Notes may be
                                withdrawn  at any time  prior to the  Expiration
                                Date.  See  "The  Exchange  Offer  -  Withdrawal
                                Rights."

How to Tender                   Tendering  holders of the Series B Notes and the
                                Series C Notes must either (i) complete and sign
                                a Letter of Transmittal,  have their  signatures
                                guaranteed  if  required,  forward the Letter of
                                Transmittal and any other required  documents to
                                the  Exchange  Agent at the  address  set  forth
                                under the caption "Exchange  Agent",  and either
                                deliver the Series B Notes and Series C Notes to
                                the Exchange Agent or tender such Series B Notes
                                and Series C Notes  pursuant  to the  procedures
                                for  book-entry   transfer  or  (ii)  request  a
                                broker,  dealer,  bank,  trust  company or other
                                nominee  to  effect  the  transaction  for them.
                                Beneficial  owners of the Series B Notes and the
                                Series  C  Notes  registered  in the  name  of a
                                broker,  dealer,  bank,  trust  company or other
                                nominee must contact such  institution to tender
                                their Series B Notes and the Series C Notes. The


                                       6
<PAGE>

                                Series  B  Notes  and  Series  C  Notes  may  be
                                physically  delivered,  but physical delivery is
                                not required if a  confirmation  of a book-entry
                                transfer  of such  Series B Notes  and  Series C
                                Notes to the Exchange  Agent's account at DTC is
                                delivered   in   a   timely   fashion.   Certain
                                provisions have also been made for holders whose
                                Series  B  Notes  and  Series  C  Notes  are not
                                readily  available or who cannot comply with the
                                procedure  for  book-entry  transfer on a timely
                                basis.  Questions  regarding  how to tender  and
                                requests for  information  should be directed to
                                the Exchange  Agent.  See "The Exchange  Offer--
                                How to Tender."

Acceptance of Tenders           Subject  to  the  terms  and  conditions  of the
                                Exchange  Offer,  including the  reservation  of
                                certain  rights  by the  Issuers,  the  Series B
                                Notes and the  Series C Notes  validly  tendered
                                prior to the  Expiration  Date will be  accepted
                                for   exchange.   Subject   to  such  terms  and
                                conditions,  the Exchange  Notes to be issued in
                                exchange for validly tendered Series B Notes and
                                Series C Notes  will be mailed  by the  Exchange
                                Agent promptly after  acceptance of the tendered
                                Series B Notes and Series C Notes or credited to
                                the   holder's   account  in   accordance   with
                                appropriate book-entry procedures.  Although the
                                Issuers  do not  currently  intend  to do so, if
                                they  modify  the  terms of the  Exchange  Offer
                                prior  to the  Expiration  Date,  such  modified
                                terms will be  available  to all  holders of the
                                Series B Notes and  Series C Notes,  whether  or
                                not their Series B Notes and Series C Notes have
                                been tendered  prior to such  modification.  Any
                                material   modification  will  be  disclosed  in
                                accordance  with  the  applicable  rules  of the
                                Commission and, if required,  the Exchange Offer
                                will be extended to permit holders of the Series
                                B Notes  and  Series  C Notes  adequate  time to
                                consider  such  modification.  See "The Exchange
                                Offer -- Acceptance of Tenders."

Exchange Agent                  IBJ  Schroder  Bank & Trust  Company,  One State
                                Street,  New York,  New York  10004,  Attention:
                                Reorganization Operations Department

Securities Offered              $275,000,000  aggregate  principal  amount of 11
                                1/2% Senior Notes due 2004.

Issuers                         Abraxas   Petroleum   Corporation  and  Canadian
                                Abraxas Petroleum Limited,  as joint and several
                                obligors.

Maturity Date                   November 1, 2004.

Interest Payment Dates          Interest on the Exchange  Notes will accrue from
                                November  1, 1997 with  respect to the  Exchange
                                Notes exchanged for the Series B Notes (the date
                                of  the  most  recent  interest  payment  on the
                                Series B Notes)  and from the  Issue  Date  with
                                respect to the Exchange Notes  exchanged for the


                                       7
<PAGE>

                                Series C Notes and will be payable semi-annually
                                on each May 1 and November 1,  commencing May 1,
                                1998.

Ranking                         The  Exchange  Notes will be  general  unsecured
                                obligations  of the  Issuers  and will rank pari
                                passu  to  all   existing   and  future   senior
                                indebtedness  of the  Issuers  and senior to all
                                future subordinated  indebtedness of the Issuers
                                and on parity with any Series B Notes and Series
                                C Notes not  exchanged.  The Exchange Notes will
                                be effectively  subordinated in right of payment
                                to all existing and future secured  indebtedness
                                of the Issuers,  including  borrowings under the
                                Credit  Facility,  to the  extent of the  assets
                                securing  such  obligations.  At March 31, 1998,
                                the Issuers had $100,000 of secured indebtedness
                                outstanding.  The Indenture  permits the Company
                                to  incur  additional  indebtedness,   including
                                additional  secured  indebtedness,   subject  to
                                certain conditions.

Guarantees                      The Exchange Notes will be jointly and severally
                                guaranteed  (the   "Guarantees")   on  a  senior
                                unsecured   basis  by  each  of  the  Subsidiary
                                Guarantors.  See  "Description  of the  Exchange
                                Notes-Guarantees."

Change of Control               Upon a Change of Control,  each holder will have
                                the right to require the  Issuers to  repurchase
                                such  holder's  Exchange  Notes at a  redemption
                                price  equal  to  101% of the  principal  amount
                                thereof plus accrued and unpaid  interest to the
                                date of  repurchase.  In  addition,  the Issuers
                                will be  obligated  to offer to  repurchase  the
                                Exchange  Notes at 100% of the principal  amount
                                thereof plus accrued and unpaid  interest to the
                                date of redemption in the event of certain asset
                                sales.

Certain Covenants               The Indenture  governing the Exchange Notes (the
                                "Indenture")  contains  certain  covenants  that
                                limit  the  ability  of the  Issuers  and  their
                                Restricted  Subsidiaries (as defined herein) to,
                                among    other    things,    incur    additional
                                indebtedness,  pay  dividends  or  make  certain
                                other restricted  payments,  consummate  certain
                                asset  sales,  enter into  certain  transactions
                                with   affiliates,   incur  liens,  and  imposes
                                restrictions  on  the  ability  of a  Restricted
                                Subsidiary  to pay  dividends  or  make  certain
                                payments  to the  Issuers  and their  Restricted
                                Subsidiaries,  merge  or  consolidate  with  any
                                other person or sell, assign,  transfer,  lease,
                                convey   or   otherwise   dispose   of   all  or
                                substantially all of the assets of either of the
                                Issuers.

        For   additional   information   regarding  the  Exchange   Notes,   see
"Description of the Exchange Notes."

                                       8
<PAGE>

                    Summary Historical Financial Information

        The following table presents summary historical  consolidated  financial
data of the Company for the five years ended December 31, 1997,  which have been
derived from the Company's consolidated financial statements. The information in
this table  should be read in  conjunction  with  "Management's  Discussion  and
Analysis  of  Financial   Condition  and  Results  of   Operations,"   "Selected
Consolidated  Financial Data," and the Consolidated Financial Statements and the
notes thereto included elsewhere in this Prospectus.
<TABLE>
<CAPTION>

                                                               Year Ended December 31,
                                            --------------------------------------------------------
                                               1993        1994       1995        1996       1997
                                               ----        ----       ----        ----       ----
                                                             (dollars in thousands)
Consolidated Statement of Operations Data:
<S>                                          <C>        <C>         <C>        <C>          <C>    
Total operating revenue (1)                  $  7,494   $ 11,349    $ 13,817   $ 26,653     $70,931
Operating expense (2)                           2,964      3,826       4,458      6,289      16,429
DD&A expense                                    2,373      3,790       5,434      9,605      30,581
G&A expense                                       510        810       1,042      1,933       4,171
Interest expense                                2,531      2,359       3,911      6,241      24,620
Amortization of deferred financing fee            649        400         214        280       1,260
Income (loss) from continuing operations
  before extraordinary items                   (1,580)       113      (1,208)     1,940      (6,485)
Preferred stock dividends                        (186)      (183)       (366)      (366)       (183)
Net income (loss) applicable to
    common stock                               (2,619)    (2,577)     (1,574)     1,147      (6,668)
Other Data:
Ratio  (deficiency)  of  earnings  to  fixed      
charges(3)(4)                                     --       1.04x          --      1.30x          --
</TABLE>


                                            December 31, 1997
                                            -------------------
                                               (dollars in
                                                thousands)
Consolidated Balance Sheet Data:
Cash and cash equivalents                      $      2,836
Total assets                                        338,520
Total debt (5)                                      248,617
Stockholders' equity (6)                             26,813
- --------------

(1) Consists of crude oil and natural gas  production  sales,  revenue  from rig
    operations and processing facilities and other miscellaneous revenue.
(2)Consists of lease operating and production taxes, rig operating  expenses and
    processing expenses.
(3) Earnings consist of income (loss) from continuing  operations  before income
    taxes plus fixed  charges.  Fixed  charges  consist of interest  expense and
    amortization of deferred financing fees.
(4) The Company's  earnings were inadequate to cover fixed charges in 1993, 1995
    and 1997 by $1,393,000, $1,208,000 and $10,376,000, respectively,.
(5) Consists of long-term debt, including capital lease obligations.
(6) Consists of 6,422,540  shares of the Company's  Common Stock, par value $.01
    per share, of which 53,023 are treasury shares.




                                       9
<PAGE>



                 Summary Historical Reserves and Operating Data

        The following table sets forth summary  information  with respect to the
Company's  estimated proved crude oil, NGLs and natural gas reserves and certain
summary  information  with respect to the Company's  operations  for the periods
indicated.  See "Management's Discussion and Analysis of Financial Condition and
Results of Operations" and the Company's  Consolidated  Financial Statements and
the notes thereto included elsewhere in this Prospectus.

                                                       At December 31,
                                                             1997
                                                      -------------------

Estimated Proved Reserves (period-end):
Crude oil and NGLs (MBbls)                                     17,777
Natural gas (MMcf)                                            221,314
Crude oil equivalents (MBOE)                                   54,663
      % Proved developed                                        82.9%

Estimated  future net revenue  before income taxes (in      $ 464,444
thousands)
PV-10 (in thousands)                                        $ 268,700
    %Proved developed                                           90.5%



                                             Year Ended December 31,
                                     ----------------------------------------
                                         1995         1996         1997
                                         ----         ----         ----
Average Net Daily Production:
Crude oil and NGLs (Bbls)                1,493        1,985        5,285
Natural gas (Mcf)                        9,733       17,397       57,671

Average Sales Price:
Crude oil (per Bbl)                   $  17.16     $  20.85     $  18.63
NGLs (per Bbl)                           10.83        14.55        10.75
Natural gas (per Mcf)                     1.47         1.97         1.79

Natural Gas Processing Plants:
Net plant capacity (MMcfpd)
      (period-end)                          25          123          137




                                       10
<PAGE>
                                  RISK FACTORS

        Prospective investors should carefully consider the following factors in
addition to the other information in this Prospectus before making an investment
in the Exchange Notes offered hereby.

High Degree of Leverage

        The Company's  total debt and  stockholders'  equity were  approximately
$248.6  million and $26.8  million,  respectively,  as of December 31, 1997. See
"Capitalization." In addition, the Company has borrowing capacity of up to $40.0
million  under the Credit  Facility.  At March 31,  1998,  the Company had $39.9
million of borrowing availability under the Credit Facility. The Company intends
to incur  additional  indebtedness  in the future in connection  with acquiring,
developing and exploiting producing  properties,  although the Company's ability
to incur  additional  indebtedness may be limited by the terms of the Series A/B
Indenture  (as defined  herein),  the  Indenture  and the Credit  Facility.  See
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations  --  Liquidity  and  Capital  Resources,"  "Description  of  Existing
Indebtedness" and "Description of the Exchange Notes."

        The Company's level of indebtedness  will have several important effects
on its future  operations  including (i) a substantial  portion of the Company's
cash flow from  operations  will be  dedicated to the payment of interest on its
indebtedness  and will not be  available  for  other  purposes;  (ii)  covenants
contained in the  Company's  debt  obligations  will require the Company to meet
certain financial tests and other  restrictions  which will limit its ability to
borrow  additional  funds or to dispose  of assets and may affect the  Company's
flexibility in planning for, and reacting to, changes in its business, including
possibly  limiting  acquisition  activities;  and (iii) the Company's ability to
obtain  additional  financing  in  the  future  for  working  capital,   capital
expenditures,  acquisitions,  interest payments,  scheduled  principal payments,
general corporate  purposes or other purposes may be limited.  See "Management's
Discussion  and Analysis of Financial  Condition  and Results of  Operations  --
Liquidity and Capital  Resources,"  "Description of Existing  Indebtedness"  and
"Description  of the  Exchange  Notes --  Certain  Covenants  --  Limitation  on
Incurrence of Additional Indebtedness."

        The Company's ability to meet its debt service obligations and to reduce
its total indebtedness will be dependent upon the Company's future  performance,
which will be subject to general economic conditions and to financial,  business
and other  factors  affecting the  operations of the Company,  many of which are
beyond  its  control.  Based  upon  the  current  level  of  operations  and the
historical  production of the producing  properties and related assets currently
owned by the  Company,  the  Company  believes  that the net  proceeds  from the
offering  of the  Series  C Notes,  its cash  flow  from  operations  as well as
borrowing capabilities will be adequate to meet its anticipated requirements for
working capital,  capital expenditures,  interest payments,  scheduled principal
payments and general corporate or other purposes for the foreseeable future. See
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations  --  Liquidity  and Capital  Resources,"  "  Description  of Existing
Indebtedness" and the Company's  Consolidated Financial Statements and the notes
thereto  included  elsewhere  in this  Prospectus.  No  assurance  can be given,
however,  that the  Company's  business will continue to generate cash flow from
operations at or above current levels or that the  historical  production of the
producing  properties and related assets  currently  owned by the Company can be
sustained  in the future.  If the  Company is unable to generate  cash flow from
operations  in the future to service its debt,  it may be required to  refinance
all or a portion of its existing debt or to obtain additional  financing.  There
can be no  assurance  that  such  refinancing  would  be  possible  or that  any
additional  financing  could be obtained.  In  addition,  the Series B Notes and
Series  C Notes  are,  and the  Exchange  Notes  will  be,  subject  to  certain
limitations  on  redemption.   See  "Management's  Discussion  and  Analysis  of
Financial   Condition  and  Results  of  Operations   --Liquidity   and  Capital
Resources,"  "Description  of Existing  Indebtedness"  and  "Description  of the
Exchange Notes -- Redemption."

Reliance on Estimates of Proved Reserves and Future Net Revenue

        There are numerous  uncertainties  inherent in estimating  quantities of
proved  reserves and in projecting  future rates of production and the timing of
development  expenditures,  including  many  factors  beyond the  control of the
Company.  The reserve data included in this Prospectus represent only estimates.
In addition,  the  estimates of future net revenue from proved  reserves and the
present value thereof are based upon certain assumptions about future production
levels,  prices  and  costs  that may not  prove to be  correct  over  time.  In
particular,  estimates of crude oil and natural gas reserves, future net revenue
from  proved  reserves  and the PV-10  thereof for the crude oil and natural gas

                                       11
<PAGE>

properties  described in this Prospectus are based on the assumption that future
crude oil and  natural  gas prices  remain the same as crude oil and natural gas
prices at December 31, 1997.  The average  sales prices as of such date used for
purposes of such estimates  were $16.76 per Bbl of crude oil,  $10.89 per Bbl of
NGLs and $2.08 per Mcf of natural  gas.  Also  assumed is the  Company's  making
future capital  expenditures  of  approximately  $36.7 million in the aggregate,
necessary  to develop and realize  the value of proved  undeveloped  reserves on
these  properties.  Any  significant  variance in these  assumptions  could also
materially affect the estimated quantity and value of reserves set forth herein.
See "Management's  Discussion and Analysis of Financial Condition and Results of
Operations  --  Liquidity  and  Capital  Resources"  and  "Business  -- Reserves
Information."

Ranking of Indebtedness

        The Exchange Notes will be general unsecured  obligations of the Issuers
and will rank pari passu in right of payment to all existing  and future  senior
indebtedness  of the  Issuers  and  senior  in right of  payment  to all  future
subordinated  indebtedness of the Issuers. In addition,  the Exchange Notes will
be unconditionally guaranteed,  jointly and severally, by each of the Subsidiary
Guarantors.  The  Guarantees  will  be  general  unsecured  obligations  of  the
Subsidiary  Guarantors  and will  rank  pari  passu in right of  payment  to all
existing and future senior indebtedness of the Subsidiary  Guarantors and senior
in right of payment to all present and future  subordinated  indebtedness of the
Subsidiary   Guarantors.   However,  the  Exchange  Notes  will  be  effectively
subordinated  to  secured   indebtedness  of  the  Issuers  and  the  Subsidiary
Guarantors to the extent of the value of the assets securing such  indebtedness.
In the event of a  liquidation  or  insolvency  of the Company or, if any of its
secured  indebtedness is accelerated,  the secured assets of the Company will be
available  to pay  obligations  on the  Exchange  Notes  only  after the  Credit
Facility and any other secured  indebtedness  has been paid in full. As of March
31,  1998,  the  Issuers and the  Subsidiary  Guarantors  had $275.1  million of
indebtedness  outstanding,  $100,000 of which was secured,  and $39.9 million of
availability under the Credit Facility,  which borrowings would be secured.  See
"Capitalization,"  "Description of the Exchange Notes," "Management's Discussion
and Analysis of Financial  Condition  and Results of Operations -- Liquidity and
Capital Resources" and "Description of Existing Indebtedness."

Repurchase of Notes Upon a Change of Control

        Upon the  occurrence  of a Change of Control,  the Issuers must offer to
purchase all of the Notes then  outstanding at a purchase price equal to 101% of
the principal amount thereof,  plus accrued and unpaid interest, if any, thereon
to the date of purchase (a "Change of Control  Offer").  See "Description of the
Exchange  Notes -- Change  of  Control."  The  events  that  require a Change of
Control Offer under the Indenture  may also  constitute  events of default under
the  Credit  Facility.  Such  events  may  permit  the  lenders  under such debt
instruments  to accelerate the payment of the debt and, if the debt is not paid,
to proceed against any collateral  securing such debt and/or commence litigation
which could ultimately  result in a sale of  substantially  all of the assets of
the Company to satisfy the debt, thereby limiting the Company's ability to raise
cash to repurchase the Notes and reducing the practical  benefit of the offer to
purchase  provisions to the holders of the Notes. These provisions may be deemed
to have anti-takeover  effects and may delay, defer or prevent a merger,  tender
offer or other takeover attempt.  Notwithstanding these provisions,  the Company
could enter into certain transactions, including certain recapitalizations, that
would not  constitute a Change of Control but would  increase the amount of debt
outstanding at such time.

        Prior to  commencing  such an  offer to  purchase,  the  Issuers  may be
required  to (i)  repay in full  all  indebtedness  of the  Issuers  that  would
prohibit the repurchase of the Notes,  including that under the Credit Facility,
or (ii) obtain any requisite consent to permit the repurchase. See "Management's
Discussion  and Analysis of Financial  Condition  and Results of  Operations  --
Liquidity and Capital Resources" and "Description of Existing  Indebtedness." If
the  Issuers  were  unable to repay all of such  indebtedness  or were unable to
obtain the  necessary  consents,  then the  Issuers  would be unable to offer to
repurchase the Notes and such failure would constitute an Event of Default under
the Indenture.  There can be no assurance that the Issuers will have  sufficient
funds available at the time of any Change of Control to repurchase the Notes.

                                       12
<PAGE>

Net Losses

        The  Company  has  experienced  recurring  losses.  For the years  ended
December 31, 1993,  1994, 1995 and 1997, the Company recorded net losses of $2.4
million,  $2.4  million,  $1.2  million  and  $6.5  million,  respectively.  See
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations" and the Company's  Consolidated  Financial  Statements and the notes
thereto included elsewhere in this Prospectus.

Industry Conditions; Impact on Company's Profitability

        The  Company's  revenue,  profitability  and  future  rate of growth are
substantially  dependent upon  prevailing  prices for crude oil and natural gas.
Crude oil and natural gas prices can be  extremely  volatile and in recent years
have been depressed by excess total domestic and imported  supplies.  Prices are
also  affected  by actions of state and local  agencies,  the United  States and
foreign  governments and international  cartels.  While prices for crude oil and
natural gas  increased  during the fourth  quarter of 1995 and remained at these
levels during 1996, prices decreased during 1997. These external factors and the
volatile  nature of the energy  markets  make it  difficult  to estimate  future
prices of crude oil and natural gas. Any substantial or extended  decline in the
prices of crude oil and natural gas,  such as the decline of crude oil which has
occurred  since December 31, 1997,  would have a material  adverse effect on the
Company's financial condition and results of operations,  including reduced cash
flow and borrowing capacity.  All of these factors are beyond the control of the
Company.  Sales of crude oil and natural gas are seasonal in nature,  leading to
substantial  differences  in cash flow at  various  times  throughout  the year.
Federal  and  state  regulation  of crude oil and  natural  gas  production  and
transportation,  general economic  conditions,  changes in supply and changes in
demand all could  adversely  affect the Company's  ability to produce and market
its crude oil and natural gas. If market  factors  were to change  dramatically,
the financial  impact on the Company could be substantial.  The  availability of
markets  and the  volatility  of product  prices  are beyond the  control of the
Company and thus represent a significant risk.

        The Company periodically reviews the carrying value of its crude oil and
natural gas properties  under the full cost  accounting  rules of the SEC. Under
these rules,  capitalized costs of proved oil and natural gas properties may not
exceed the present value of estimated  future net revenues from proved reserves,
discounted at 10%.  Application of the ceiling test generally  requires  pricing
future revenue at the unescalated  prices in effect as of the end of each fiscal
quarter and  requires a  write-down  for  accounting  purposes if the ceiling is
exceeded,  even if prices were  depressed  for only a short period of time.  The
Company was required to write-down  the carrying value of its Canadian crude oil
and  natural gas  properties  at  December  31, 1997 by $4.6  million and may be
required  to  write-down  the  carrying  value of its crude oil and  natural gas
properties  in the future  when oil and  natural  gas prices  are  depressed  or
unusually  volatile.  When a write-down  is required,  it results in a charge to
earnings,  but does not impact cash flow from operating activities.  The Company
sustained a charge to earnings of $4.6  million at December 31, 1997 as a result
of the  write-down.  Once  incurred,  a write-down  of crude oil and natural gas
properties is not  reversible  at a later date. If such a write-down  were large
enough,  it could  result in the  occurrence  of an event of  default  under the
Credit  Facility that could require the sale of some of the Company's  producing
properties under  unfavorable  market  conditions or require the Company to seek
additional  equity capital.  In addition,  the Indenture  governing the Series B
Notes (the  "Series  A/B  Indenture"),  the  Indenture  and the Credit  Facility
contain  certain  restrictions  on certain  sales of assets by the Company.  See
"Description of the Exchange  Notes,"  "Management's  Discussion and Analysis of
Financial   Condition  and  Results  of  Operations  --  Liquidity  and  Capital
Resources" and "Description of Existing Indebtedness."

        In order to manage its  exposure to price risks in the  marketing of its
crude oil and natural  gas, the Company from time to time has entered into fixed
price delivery contracts,  financial swaps and crude oil and natural gas futures
contracts as hedging devices. To ensure a fixed price for future production, the
Company may sell a futures  contract  and  thereafter  either (i) make  physical
delivery of crude oil or natural gas to comply with such  contract or (ii) buy a
matching futures contract to unwind its futures position and sell its production
to a customer.  Such  contracts  may expose the Company to the risk of financial
loss in certain circumstances, including instances where production is less than
expected,  the Company's  customers  fail to purchase or deliver the  contracted
quantities of crude oil or natural gas, or a sudden, unexpected event materially
impacts  crude oil or natural gas prices.  Such  contracts may also restrict the
ability of the Company to benefit  from  unexpected  increases  in crude oil and
natural gas prices.  See  "Management's  Discussion  and  Analysis of  Financial
Condition and Results of Operations -- Liquidity and Capital Resources."

                                       13
<PAGE>

Restrictions Imposed by Terms of the Company's Indebtedness

        The  Series  A/B  Indenture,  the  Indenture  and  the  Credit  Facility
restrict,  among  other  things,  the  Company's  ability  to  incur  additional
indebtedness,  incur  liens,  pay  dividends or make  certain  other  restricted
payments,  consummate certain asset sales, enter into certain  transactions with
affiliates,  merge  or  consolidate  with any  other  person  or  sell,  assign,
transfer,  lease, convey or otherwise dispose of all or substantially all of the
assets of the Company. The Credit Facility also requires the Company to maintain
specified  financial  ratios and satisfy certain  financial tests. The Company's
ability to meet such financial ratios and tests may be affected by events beyond
its  control,  and there can be no  assurance  that the  Company  will meet such
ratios and tests. See "Description of the Exchange Notes -- Certain  Covenants,"
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations  -- Liquidity and Capital  Resources"  and  "Description  of Existing
Indebtedness."  A breach  of any of these  covenants  could  result in a default
under the Series A/B Indenture,  the Indenture and/or the Credit Facility.  Upon
the  occurrence  of an event of default under the Credit  Facility,  the lenders
thereunder  could  elect to declare  all  amounts  outstanding  under the Credit
Facility,  together with accrued interest, to be immediately due and payable. If
the Company  were unable to repay those  amounts,  such  lenders  could  proceed
against  the  collateral  granted to them to secure  that  indebtedness.  If the
lenders under the Credit Facility  accelerate the payment of such  indebtedness,
there can be no assurance  that the assets of the Company would be sufficient to
repay in full such  indebtedness  and the  other  indebtedness  of the  Company,
including  the Notes.  Substantially  all of the  Company's  assets,  including,
without  limitation,  working capital and interests in producing  properties and
related assets owned by the Company,  and the proceeds thereof are or may in the
future be  pledged as  security  under the Credit  Facility.  See  "Management's
Discussion  and Analysis of Financial  Condition  and Results of  Operations  --
Liquidity and Capital Resources" and "Description of Existing Indebtedness."

Substantial Capital Requirements

        The  Company  makes,  and will  continue  to make,  substantial  capital
expenditures for the  acquisition,  exploitation,  development,  exploration and
production of crude oil and natural gas reserves.  Historically, the Company has
financed  these  expenditures  primarily  with cash flow from  operations,  bank
borrowings  and the  offering  of its debt and equity  securities.  The  Company
believes  that it will  have  sufficient  capital  to  finance  planned  capital
expenditures.  If  revenue  or the  Company's  borrowing  base  under the Credit
Facility  decrease  as a result  of lower  crude  oil and  natural  gas  prices,
operating  difficulties  or declines in  reserves,  the Company may have limited
ability to finance planned capital  expenditures in the future.  There can be no
assurance  that  additional  debt  or  equity  financing  or cash  generated  by
operations  will be  available  to meet these  requirements.  See  "Management's
Discussion  and  Analysis  of  Financial  Condition  and  Results of  Operations
- --Liquidity and Capital Resources" and "Description of Existing Indebtedness."

Foreign Operations

        The Company's  operations  are subject to the risks of  restrictions  on
transfers of funds, export duties and quotas, domestic and international customs
and tariffs,  and changing  taxation  policies,  foreign exchange  restrictions,
political  conditions and  governmental  regulations.  In addition,  the Company
receives a substantial  portion of its revenue in Canadian dollars. As a result,
fluctuations  in the exchange  rates of the Canadian  dollar with respect to the
U.S.  dollar could have an adverse effect on the Company's  financial  position,
results of operations  and cash flows.  The Company's  stockholders'  equity was
negatively   impacted  by   approximately   $2.5  million  during  1997  due  to
fluctuations in the foreign currency translation rate. The Company may from time
to time engage in hedging programs intended to reduce the Company's  exposure to
currency fluctuations.

Future Availability of Natural Gas Supply

        To obtain  volumes  of  committed  natural  gas  reserves  to supply the
Canadian  Abraxas  Plants (as defined  herein),  Canadian  Abraxas  contracts to
process  natural  gas  with  various  producers.  Future  natural  gas  supplies
available for  processing at the Canadian  Abraxas  Plants will be affected by a
number of factors  that are not  within the  Company's  control,  including  the
depletion  rate of natural gas  reserves  currently  connected  to the  Canadian
Abraxas Plants and the extent of exploration for, production and development of,
and demand for natural gas in the areas in which Canadian  Abraxas will operate.


                                       14
<PAGE>

Long-term  contracts will not protect  Canadian  Abraxas from shut-ins or supply
curtailments by natural gas suppliers. Although CGGS was historically successful
in contracting  for new natural gas supplies and in renewing  natural gas supply
contracts as they expired,  there is no assurance that Canadian  Abraxas will be
able to do so on a similar basis in the future.

Operating Hazards; Uninsured Risks

        The nature of the crude oil and natural gas  business  involves  certain
operating  hazards  such as crude  oil and  natural  gas  blowouts,  explosions,
encountering formations with abnormal pressures,  cratering and crude oil spills
and fires,  any of which could result in damage to or  destruction  of crude oil
and natural gas wells,  destruction of producing  facilities,  damage to life or
property, suspension of operations,  environmental damage and possible liability
to the Company.  In accordance with customary  industry  practices,  the Company
maintains  insurance  against some, but not all, of such risks and some, but not
all,  of such  losses.  The  occurrence  of such an event not fully  covered  by
insurance  could have a material  adverse effect on the financial  condition and
results of operations of the Company.

Competition

        The Company  encounters strong  competition from major oil companies and
independent  operators in acquiring  properties  and leases for the  exploration
for, and production of, crude oil and natural gas.  Competition is  particularly
intense with respect to the acquisition of desirable  undeveloped  crude oil and
natural gas properties.  The principal competitive factors in the acquisition of
such undeveloped crude oil and natural gas properties include the staff and data
necessary  to  identify,  investigate  and  purchase  such  properties,  and the
financial  resources  necessary to acquire and develop such properties.  Many of
the  Company's  competitors  have  financial  resources,  staff  and  facilities
substantially  greater than those of the Company.  In addition,  the  producing,
processing and marketing of crude oil and natural gas is affected by a number of
factors which are beyond the control of the Company,  the effect of which cannot
be accurately predicted.

        The principal  resources necessary for the exploration and production of
crude oil and  natural  gas are  leasehold  prospects  under which crude oil and
natural gas reserves may be discovered,  drilling rigs and related  equipment to
explore for such reserves and  knowledgeable  personnel to conduct all phases of
crude  oil and  natural  gas  operations.  The  Company  must  compete  for such
resources  with both major crude oil and natural gas companies  and  independent
operators.  Although the Company  believes its current  operating  and financial
resources are adequate to preclude any significant  disruption of its operations
in the  immediate  future,  the  continued  availability  of such  materials and
resources to the Company cannot be assured.

        The Company  faces  significant  competition  for  obtaining  additional
natural gas supplies for  gathering  and  processing  operations,  for marketing
NGLs, residue gas, helium,  condensate and sulfur, and for transporting  natural
gas and liquids.  The Company's  principal  competitors include major integrated
oil  companies  and  their  marketing  affiliates  and  national  and  local gas
gatherers,  brokers,  marketers and  distributors  of varying  sizes,  financial
resources  and  experience.  Certain  competitors,  such as major  crude oil and
natural gas companies,  have capital  resources and control  supplies of natural
gas substantially greater than the Company. Smaller local distributors may enjoy
a marketing advantage in their immediate service areas.

        The  Company  competes  against  other  companies  in  its  natural  gas
processing  business both for supplies of natural gas and for customers to which
it will  sell its  products.  Competition  for  natural  gas  supplies  is based
primarily  on  location  of natural  gas  gathering  facilities  and natural gas
gathering plants,  operating  efficiency and reliability and ability to obtain a
satisfactory  price for products  recovered.  Competition for customers is based
primarily on price and delivery capabilities.

Certain Business Risks

        The  Company  intends  to  continue  acquiring  producing  crude oil and
natural gas  properties  or  companies  that own such  properties.  Although the
Company  performs  a review  of the  acquired  properties  that it  believes  is


                                       15
<PAGE>

consistent with industry practices,  such reviews are inherently incomplete.  It
generally is not feasible to review in depth every individual  property involved
in each  acquisition.  Ordinarily,  the Company will focus its review efforts on
the  higher-valued  properties and will sample the remainder.  However,  even an
in-depth  review  of all  properties  and  records  may not  necessarily  reveal
existing  or  potential  problems  nor will it  permit  the  Company  to  become
sufficiently familiar with the properties to assess fully their deficiencies and
capabilities.  Inspections  may not  always  be  performed  on every  well,  and
environmental problems, such as ground water contamination,  are not necessarily
observable even when an inspection is undertaken.  Furthermore, the Company must
rely on information,  including financial, operating and geological information,
provided by the seller of the properties  without being able to verify fully all
such information and without the benefit of knowing the history of operations of
all such properties.

        In addition, a high degree of risk of loss of invested capital exists in
almost all exploration and development  activities which the Company undertakes.
No assurance  can be given that crude oil or natural gas will be  discovered  to
replace reserves currently being developed,  produced and sold, or that if crude
oil or natural gas reserves are found, they will be of a sufficient  quantity to
enable the Company to recover the  substantial  sums of money  incurred in their
acquisition,  discovery  and  development.  Drilling  activities  are subject to
numerous risks, including the risk that no commercially  productive crude oil or
natural gas reservoirs will be encountered. The cost of drilling, completing and
operating wells is often uncertain.  The Company's  operations may be curtailed,
delayed or cancelled as a result of numerous  factors  including title problems,
weather conditions,  compliance with governmental  requirements and shortages or
delays in the delivery of equipment.  The availability of a ready market for the
Company's  natural gas  production  depends on a number of  factors,  including,
without  limitation,  the demand for and supply of natural gas, the proximity of
natural gas reserves to pipelines, the capacity of such pipelines and government
regulations.

Depletion of Reserves

        The  rate of  production  from  crude  oil and  natural  gas  properties
declines as reserves  are  depleted.  Except to the extent the Company  acquires
additional   properties   containing   proved  reserves,   conducts   successful
exploration  and  development   activities  or,  through  engineering   studies,
identifies  additional  behind-pipe zones or secondary  recovery  reserves,  the
proved  reserves of the Company will decline as reserves  are  produced.  Future
crude oil and natural gas  production  is therefore  highly  dependent  upon the
Company's level of success in acquiring or finding additional reserves.  See "--
Certain Business Risks."

        The  Company's  ability to continue to acquire  producing  properties or
companies that own such properties  assumes that major  integrated oil companies
and  independent  oil companies  will continue to divest many of their crude oil
and  natural  gas  properties.  There can be no  assurance,  however,  that such
divestitures  will  continue  or that the Company  will be able to acquire  such
properties at acceptable prices or develop additional reserves in the future. In
addition,  under  the  terms  of the  Indenture  and the  Credit  Facility,  the
Company's ability to obtain additional  financing in the future for acquisitions
and capital expenditures may be limited.

Government Regulation

        The Company's business is subject to certain federal,  state, provincial
and local laws and regulations  relating to the exploration for and development,
production and marketing of crude oil and natural gas, as well as  environmental
and  safety  matters.  Such laws and  regulations  have  generally  become  more
stringent in recent years,  often imposing greater  liability on a larger number
of potentially  responsible  parties.  Because the requirements  imposed by such
laws and  regulations are frequently  changed,  the Company is unable to predict
the ultimate cost of compliance  with such  requirements.  There is no assurance
that laws and  regulations  enacted in the future will not adversely  affect the
Company's  financial  condition  and results of  operations.  See  "Business  --
Regulatory Matters."

Fraudulent Transfer Considerations

        Under  applicable  provisions  of the United States  Bankruptcy  Code or
comparable  provisions of state  fraudulent  transfer or conveyance  law, if the
Subsidiary  Guarantors,  at the time they incurred the Guarantees,  (a) incurred
such  indebtedness  with the intent to hinder,  delay or defraud  creditors,  or


                                       16
<PAGE>

(b)(i) received less then reasonably  equivalent value or fair consideration and
(ii)  (A)  was  insolvent  at the  time  of such  incurrence,  (B) was  rendered
insolvent  by reason of such  incurrence  (and the  application  of the proceeds
thereof),  (C) was engaged or was about to engage in a business  or  transaction
for which the assets remaining with the Company  constituted  unreasonably small
capital to carry on its business,  or (D) intended to incur, or believed that it
would incur, debts beyond its ability to pay such debts as they mature,  then in
each such case, a court of  competent  jurisdiction  could void,  in whole or in
part,  the  Guarantees  or, in the  alternative,  subordinate  the Guarantees to
existing  and future  indebtedness  of the  Subsidiary  Guarantors.  Among other
things, a legal challenge of the Guarantees  issued by any Subsidiary  Guarantor
on fraudulent  conveyance grounds may focus on the benefits, if any, realized by
such  Subsidiary  Guarantor  as a result of the  issuance  by the Issuers of the
Notes. To the extent the Guarantee was voided as a fraudulent conveyance or held
unenforceable for any other reason, the holders of the Notes would cease to have
any claim against such Subsidiary Guarantor and would be creditors solely of the
Issuers  and any  Subsidiary  Guarantor  whose  Guaranty  was not voided or held
unenforceable. In such event, the claims of the holders of the Notes against the
issuer of an invalid  Guarantee  would be  subject  to the prior  payment of all
liabilities of such Subsidiary Guarantor.  There can be no assurance that, after
providing for all prior claims,  there would be sufficient assets to satisfy the
claims of the holders of the Notes  relating  to any avoided  portions of any of
the Guarantees.

        The measure of  insolvency  for purposes of the  foregoing  would likely
vary  depending  upon  the law  applied  to such  case.  Generally,  however,  a
Subsidiary  Guarantor  would be  considered  insolvent  if the sum of its debts,
including contingent  liabilities,  was greater than all of its assets at a fair
valuation,  or if the present fair salable value of its assets was less than the
amount that would be required to pay the  probable  liabilities  on its existing
debts,  including  contingent  liabilities,  as such debts  become  absolute and
matured.  The Issuers believe that, for purposes of the United States Bankruptcy
Code and state  fraudulent  transfer or conveyance  laws, the Guarantees will be
issued without the intent to hinder,  delay or defraud  creditors and for proper
purposes  and in good faith,  and that the  Subsidiary  Guarantors  will receive
reasonably equivalent value or fair consideration  therefor,  and that after the
issuance of the  Guarantees and the  application of the net proceeds  therefrom,
the Subsidiary  Guarantors will be solvent, have sufficient capital for carrying
on their businesses and will be able to pay their debts as they mature. However,
there can be no assurance  that a court  passing on such issues would agree with
the determination of the Issuers.

Dependence on Key Personnel

        The  Company  depends  to a large  extent on Robert  L. G.  Watson,  its
Chairman of the Board, President and Chief Executive Officer, for its management
and business and financial contacts. See "Management." The unavailability of Mr.
Watson would have a materially  adverse  effect on the Company's  business.  The
Company's  success  is also  dependent  upon its  ability  to employ  and retain
skilled  technical  personnel.  While the  Company  has not to date  experienced
difficulties in employing or retaining such  personnel,  its failure to do so in
the future could adversely affect its business.

Limitations   on  the   Availability   of  the  Company's  Net  Operating   Loss
Carryforwards

        At December  31,  1997,  the  Company  had,  subject to the  limitations
discussed below,  $25.1 million of net operating loss carryforwards for U.S. tax
purposes,  of which  approximately  $22.4 million are available for  utilization
without limitation.  These loss carryforwards will expire from 2002 through 2010
if not utilized. As a result of the acquisition of certain partnership interests
and crude oil and natural gas  properties in 1990 and 1991, an ownership  change
under  Section 382  ("Section  382") of the Internal  Revenue  Code of 1986,  as
amended (the  "Code"),  occurred  with respect to the Company in December  1991.
Accordingly,  it is expected  that the use of net operating  loss  carryforwards
generated  prior  to  December  31,  1991 of $4.9  million  will be  limited  to
approximately  $235,000 per year.  During 1992, the Company acquired 100% of the
outstanding  capital  stock  of an  unrelated  corporation.  The  use of the net
operating loss  carry-forwards of $1.1 million of the unrelated  corporation are
limited to  approximately  $115,000  per year.  As a result of the  issuance  of
additional  shares  of  Common  Stock for  acquisitions  and sales of stock,  an
additional  ownership  change  under  Section  382  occurred  in  October  1993.
Accordingly,  it is  expected  that  the  use of all  U.S.  net  operating  loss
carryforwards  generated  through  1993,  or $8.2  million,  will be  limited to
approximately  $1 million per year subject to the lower limits  described  above


                                       17
<PAGE>

and $7.2 million in the  aggregate.  Further  changes in  ownership  may further
limit the use of the  Company's  carryforwards.  In  addition to the Section 382
limitations,  uncertainties  exist as to the future utilization of the operating
loss  carryforwards  under the criteria set forth under FASB  Statement No. 109.
Therefore, the Company has established a valuation allowance of $5.7 million and
$5.9   million  for   deferred  tax  assets  at  December  31,  1996  and  1997,
respectively.

Lack  of Public Market

        The Notes are a new issue of securities for which there  currently is no
public  market.  The  Issuers do not intend to list the Notes on any  securities
exchange.  Although  the Initial  Purchaser  has  informed  the Issuers  that it
intends to make a market in the Notes, the Initial Purchaser is not obligated to
make a market in the Notes and any market making may be discontinued at any time
at the sole discretion of the Initial Purchaser. In addition, such market-making
activity is subject to the limits imposed by the Securities Act and the Exchange
Act and may be limited  during the Exchange  Offer and the pendancy of any shelf
registration  statement.  If a market  develops  for the Notes,  there can be no
assurance as to the liquidity of such market, the ability of the holders to sell
their Notes or the prices at which holders would be able to sell the Notes. If a
market for the Notes does  develop,  the Notes may trade at a discount  to their
principal amount, depending on prevailing interest rates, the market for similar
securities,  the  performance of the Company,  and other  factors.  See "Plan of
Distribution."

Exchange Notes; Dilution of Interest

        It is likely that all Series B Notes and Series C Notes will be tendered
for  exchange in the  Exchange  Offer;  however,  there is no  assurance  that a
significant amount of Series B Notes and Series C Notes will be so tendered.  If
all  Series B Notes  and  Series  C Notes  are  exchanged  for  Exchange  Notes,
$275,000,000  aggregate  principal  amount of Exchange Notes will be outstanding
following  consummation  of the Exchange  Offer,  and the Exchange Notes will be
deemed to be a single series of notes outstanding  under the Indenture.  In such
case,  any  actions  requiring  the  consent of each  Holder or the Holders of a
majority  in  outstanding  principal  amount of Notes under the  Indenture  will
therefore require the consent of each Holder of Exchange Notes or the Holders of
a majority in aggregate principal amount of such outstanding  Exchange Notes, as
applicable,  and the individual  voting interest of each Holder will accordingly
be diluted.

Blue Sky Restrictions on Resale of Exchange Notes

        In order to comply with the  securities  laws of certain  jurisdictions,
the Exchange  Notes may not be offered or resold by any holder  unless they have
been registered or qualified for sale in such jurisdictions or an exemption from
registration  or  qualification  is  available  and  the  requirements  of  such
exemption have been satisfied.  The Issuers do not currently  intend to register
or qualify the resale of the Exchange Notes in any such jurisdictions.  However,
an exemption is generally  available for sales to registered  broker-dealers and
certain institutional buyers. Other exemptions under applicable state securities
laws may also be available.

                                       18
<PAGE>


                          PURPOSE OF THE EXCHANGE OFFER

        In connection  with the initial sale of the Series C Notes,  the Issuers
agreed, subject to certain conditions,  to use their best efforts to conduct the
Exchange Offer pursuant to the terms of the Registration Rights Agreement by and
among  the  Issuers  and  the  Initial  Purchaser  (the   "Registration   Rights
Agreement").  Pursuant to the Registration Rights Agreement,  the Issuers agreed
to (i) cause to be filed  with the  Commission,  no later than 75 days after the
Issue Date, a  registration  statement  under the Securities Act relating to the
Exchange Notes and the Exchange Offer,  (ii) use their best efforts (a) to cause
such  registration  statement to be declared  effective by the  Commission in no
event later than 135 days after the Issue Date,  (b) unless the  Exchange  Offer
would not be permitted by applicable law or Commission  policy,  to commence the
Exchange  Offer and to consummate  the Exchange  Offer,  on or prior to 165 days
after the Issue Date and (c) to cause the  Exchange  Offer to remain  open for a
period of not less than 30 days.  The  Issuers'  purpose in making the  Exchange
Offer is to comply  with such  agreement  and to avoid the  increase in interest
rate on the Series C Notes which would occur if the Exchange Offer were not duly
and timely consummated. The objectives of the Exchange Offer are (i) to create a
single series of debt securities  having a total  outstanding  principal  amount
which is larger  than  either the Series B Notes or Series C Notes as a separate
series and (ii) to enable the  holders of the Series C Notes,  which are subject
to trading limitations,  to receive securities which do not contain restrictions
on trading.

        The Exchange Offer  provides  holders of the Series B Notes and Series C
Notes with the  Exchange  Notes that will  generally be freely  transferable  by
holders  thereof  (other than any holder who is an  "affiliate" or "promoter" of
the Issuers  within the meaning of Rule 405 under the  Securities  Act), who may
offer for resale,  resell or otherwise  transfer  such  Exchange  Notes  without
complying  with the  registration  and  prospectus  delivery  provisions  of the
Securities  Act,  provided that such Exchange Notes are acquired in the ordinary
course of each such holder's  business and such holders have no  arrangement  or
understanding  with any person to participate in a distribution  of the Exchange
Notes.  Each holder who  participates  in the Exchange Offer will be required to
represent  that  any  Exchange  Notes  received  by it will be  acquired  in the
ordinary  course  of its  business,  that  at the  time of  consummation  of the
Exchange Offer such holder will have no arrangement  or  understanding  with any
person to participate in the  distribution of the Exchange Notes in violation of
the provisions of the  Securities  Act, and that such holder is not an affiliate
of the Issuers within the meaning of the Securities Act.



                                       19
<PAGE>


                          RESALE OF THE EXCHANGE NOTES

        With respect to resales of the Exchange Notes,  based on interpretations
by the staff of the  Commission  set forth in no-action  letters issued to third
parties, the Issuers believe that a holder or other person who receives Exchange
Notes,  whether or not such person is the holder (other than a person that is an
"affiliate"  of the Issuers  within the meaning of Rule 405 under the Securities
Act) who  receives  Exchange  Notes in  exchange  for Series B Notes or Series C
Notes in the ordinary course of business and who is not participating,  does not
intend to participate,  and has no arrangement or understanding  with any person
to participate,  in the  distribution of the Exchange Notes,  will be allowed to
resell the Exchange Notes to the public without further  registration  under the
Securities Act and without  delivering to the purchasers of the Exchange Notes a
prospectus that satisfies the  requirements of Section 10 of the Securities Act.
However,  if any holder  acquires  Exchange  Notes in the Exchange Offer for the
purpose of  distributing  or  participating  in a  distribution  of the Exchange
Notes,  such holder  cannot rely on the position of the staff of the  Commission
enunciated in such no-action letters or any similar  interpretive  letters,  and
must comply with the  registration and prospectus  delivery  requirements of the
Securities  Act (with such  prospectus  containing  the  selling  securityholder
information  required by Item 507 of Regulation S-K under the Securities Act) in
connection with any resale transaction, unless an exemption from registration is
otherwise  available.  Further,  each Participating  Broker-Dealer that receives
Exchange  Notes for its own account in  exchange  for Series B Notes or Series C
Notes,  where  such  Series B Notes  or  Series C Notes  were  acquired  by such
Participating  Broker-Dealer  as a result of  market-making  activities or other
trading activities,  may be a statutory underwriter and must acknowledge that it
will deliver a prospectus  meeting the requirements of the Securities Act (which
may be this Prospectus,  as it may be amended or supplemented from time to time)
in connection with any resale of such Exchange Notes.

        As contemplated by these no-action  letters and the Registration  Rights
Agreement,  each holder accepting the Exchange Offer is required to represent to
the Issuers in the Letter of  Transmittal  that (i) the Exchange Notes are to be
acquired by the holder or the person  receiving such Exchange Notes,  whether or
not such person is the holder,  in the  ordinary  course of  business,  (ii) the
holder or any such other person (other than a  broker-dealer  referred to in the
next  sentence)  is  not  engaging  and  does  not  intend  to  engage,  in  the
distribution  of the Exchange  Notes,  (iii) the holder or any such other person
has no  arrangement  or  understanding  with any  person to  participate  in the
distribution of the Exchange  Notes,  (iv) neither the holder nor any such other
person is an "affiliate" of the Issuers within the meaning of Rule 405 under the
Securities Act, and (v) the holder or any such other person acknowledges that if
such holder or other person  participates  in the Exchange Offer for the purpose
of  distributing  the Exchange  Notes it must comply with the  registration  and
prospectus  delivery  requirements  of the Securities Act in connection with any
resale of the  Exchange  Notes and cannot  rely on such  no-action  letters.  As
indicated above, each Participating Broker-Dealer that receives an Exchange Note
for its own  account in  exchange  for the Series B Notes or Series C Notes must
acknowledge  that it will deliver a prospectus in connection  with any resale of
such Exchange  Notes.  For a description  of the  procedures for such resales by
Participating Broker-Dealers, see "Plan of Distribution."

                              PLAN OF DISTRIBUTION

        Each  Participating  Broker-Dealer  that receives Exchange Notes for its
own account pursuant to the Exchange Offer must acknowledge that it will deliver
a  prospectus  in  connection  with any  resale  of such  Exchange  Notes.  This
Prospectus,  as it may be amended or supplemented from time to time, may be used
by a  Participating  Broker-Dealer  in connection with resales of Exchange Notes
received in exchange  for the Series B Notes or Series C Notes where such Series
B Notes or Series C Notes were acquired as a result of market-making  activities
or other  trading  activities.  The Issuers have agreed that they will make this
Prospectus,   as  amended  or  supplemented,   available  to  any  Participating
Broker-Dealer  for use in  connection  with any such  resale  during  the period
required by the Securities Act.

        The Issuers will not receive any proceeds from any sales of the Exchange
Notes  by   Participating   Broker-Dealers.   The  Exchange  Notes  received  by
Participating  Broker-Dealers  for their own account  pursuant  to the  Exchange
Offer  may be  sold  from  time  to  time  in one or  more  transactions  in the


                                       20
<PAGE>

over-the-counter  market,  in  negotiated  transactions,  through the writing of
options on the Exchange  Notes or a  combination  of such methods of resale,  at
market  prices  prevailing  at the time of  resale,  at prices  related  to such
prevailing  market  prices or  negotiated  prices.  Any such  resale may be made
directly  to the  purchaser  or  through  brokers  or  dealers  who may  receive
compensation   in  the  form  of  commissions  or  concessions   from  any  such
Participating  Broker-Dealer  and/or the purchasers of any such Exchange  Notes.
Any  Participating  Broker-Dealer  that  resells  the  Exchange  Notes that were
received by it for its own account pursuant to the Exchange Offer and any broker
or dealer that  participates  in a  distribution  of such Exchange  Notes may be
deemed to be an  "underwriter"  within the meaning of the Securities Act and any
profit on any such resale of Exchange  Notes and any  commissions or concessions
received by any such persons may be deemed to be underwriting compensation under
the Securities Act. The Letter of Transmittal  states that by acknowledging that
it will deliver and by delivering a prospectus,  a  Participating  Broker-Dealer
will not be deemed to admit that it is an  "underwriter"  within the  meaning of
the Securities Act. The Issuers have agreed to pay all expenses  incident to the
Exchange  Offer other than  commissions or concessions of any brokers or dealers
and will indemnify an Eligible Holder  (including any certain  profits)  against
certain liabilities, including liabilities under the Securities Act.

        The Issuers will promptly send additional  copies of this Prospectus and
any   amendment  or  supplement   to  this   Prospectus  to  any   Participating
Broker-Dealer that requests such documents in the Letter of Transmittal.

                               THE EXCHANGE OFFER

Terms of the Offer

        The Issuers hereby offer, upon the terms and conditions set forth herein
and in the related Letter of  Transmittal,  to exchange the Exchange Notes for a
like principal  amount of the outstanding  Series B Notes and Series C Notes. An
aggregate  of $275.0  million  principal  amount of Series B Notes and  Series C
Notes are  outstanding.  The Exchange Offer is not conditioned  upon any minimum
amount of the Series B Notes and the Series C Notes being tendered.

        The  Exchange  Offer will  expire at 5:00 p.m.,  New York City time,  on
___________,  1998, unless extended. The term "Expiration Date" means 5:00 p.m.,
New York City time,  on  __________ , 1998,  unless the  Issuers,  in their sole
discretion,  notify the Exchange Agent that the period of the Exchange Offer has
been extended,  in which case the term  "Expiration  Date" means the latest time
and date on which the Exchange Offer as so extended will expire.
See "-- Expiration and Extension."

        Holders  of the  Series  B Notes  and the  Series  C Notes  who  wish to
exchange  the Series B Notes and the Series C Notes for the  Exchange  Notes and
who  validly  tender the  Series B Notes and the Series C Notes to the  Exchange
Agent or validly  tender the Series B Notes and the Series C Notes by  complying
with the book-entry transfer  procedures  described below and, in each case, who
furnish  the  Letter of  Transmittal  and any other  required  documents  to the
Exchange  Agent,  will  either  have the  Exchange  Notes  mailed to them by the
Exchange  Agent  or have  the  Exchange  Notes  credited  to  their  account  in
accordance with the book-entry  transfer  procedures  described below,  promptly
after  such  tender  is  accepted  by the  Issuers.  Subject  to the  terms  and
conditions  of the  Exchange  Offer,  the  Series B Notes and the Series C Notes
which have been validly  tendered prior to the Expiration  Date will be accepted
on or promptly after the Expiration Date. Subject to the applicable rules of the
Commission,  the  Issuers,  however,  reserve  the  right,  prior  to the  first
acceptance of tendered Series B Notes and Series C Notes, to delay acceptance of
tendered  Series B Notes and Series C Notes, or to terminate the Exchange Offer,
subject  to the  provisions  of Rule  14e-1(c)  under the  Exchange  Act,  which
requires  that a tender  offeror  pay the  consideration  offered  or return the
tendered  securities  promptly  after the  termination or withdrawal of a tender
offer.

        In  addition,  the Issuers  reserve the right to waive any  condition or
otherwise amend the Exchange Offer in any respect  consistent with the Indenture
and the Registration Rights Agreement prior to the acceptance of tendered Series
B Notes and Series C Notes.  If any  amendment  by the  Issuers of the  Exchange
Offer or waiver by the Issuers of any condition  thereto  constitutes a material
change in the information  previously disclosed to the holders of Series B Notes


                                       21
<PAGE>

and Series C Notes, the Issuers will, in accordance with the applicable rules of
the  Commission,  disseminate  promptly  disclosure  of such  change in a manner
reasonably  calculated to inform such holders of such change. If it is necessary
to permit an adequate  dissemination  of  information  regarding  such  material
change,  the Issuers will extend the Exchange  Offer to permit an adequate  time
for  holders  of the  Series B Notes  and the  Series C Notes  to  consider  the
additional information.

Certain Effects of the Exchange Offer

        Because the Exchange  Offer is for any and all Series B Notes and Series
C Notes,  the number of Series B Notes and Series C Notes tendered and exchanged
in the  Exchange  Offer will reduce the  principal  amount of Series B Notes and
Series C Notes outstanding. As a result, the liquidity of any remaining Series B
Notes and  Series C Notes may be  substantially  reduced.  Because  the  Issuers
anticipate  that most holders of Series B Notes and Series C Notes will elect to
exchange  such Series B Notes and Series C Notes for the  Exchange  Notes due to
the  absence of  restrictions  on the  resale of the  Exchange  Notes  under the
Securities Act, the Issuers  anticipate that the liquidity of the market for any
Series B Notes  and  Series C Notes  remaining  after  the  consummation  of the
Exchange Offer may be substantially limited.

Expiration and Extension

        The  Exchange  Offer will  expire at 5:00 p.m.,  New York City time,  on
__________ , 1998,  unless  extended by the Issuers.  The Exchange  Offer may be
extended by oral or written notice from the Issuers to the Exchange Agent at any
time or from time to time, on or prior to the date then fixed for the expiration
of the Exchange  Offer.  Public  announcement  of any  extension of the Exchange
Offer will be timely made by the Issuers,  but, unless otherwise required by law
or  regulation,  the Issuers will not have any  obligation to  communicate  such
public  announcement  other  than by  making a  release  to the Dow  Jones  News
Service.

        The Issuers  reserve the right, in their sole  discretion,  (i) to delay
accepting  any  Series B Notes or Series C Notes,  (ii) to extend  the  Exchange
Offer or (iii) if any conditions set forth below under "-- Conditions" shall not
have been  satisfied,  to terminate the Exchange Offer by giving oral or written
notice of such delay,  extension or termination to the Exchange Agent.  Any such
delay in  acceptance,  extension,  termination  or amendment will be followed as
promptly as  practicable  by oral or written  notice  thereof to the  registered
holders.  If the Exchange Offer is amended in a manner determined by the Issuers
to  constitute  a material  change,  the Issuers  will  promptly  disclose  such
amendment by means of a prospectus  supplement  that will be  distributed to the
registered holders of the Series B Notes and the Series C Notes, and the Issuers
will  extend  the  Exchange  Offer  for a period of five to ten  business  days,
depending upon the significance of the amendment and the manner of disclosure to
the registered holders, if the Exchange Offer would otherwise expire during such
five to ten business day period.

Conditions

        The  Exchange  Offer is subject  to the  following  conditions:  (i) the
Exchange Offer does not violate applicable law or any applicable  interpretation
of the staff of the  Commission,  (ii) no action or  proceeding is instituted or
threatened  in any court or by any  governmental  agency which might  materially
impair the  ability of the  Issuers to proceed  with the  Exchange  Offer and no
material  adverse  development has occurred in any existing action or proceeding
with  respect to the  Issuers  and (iii) all  governmental  approvals  have been
obtained, which approvals the Issuers deem necessary for the consummation of the
Exchange Offer.

Registration Rights

        Pursuant to the  Registration  Rights  Agreement,  the Issuers agreed to
file the  Registration  Statement  with the Commission on the  appropriate  form
under  the  Securities  Act  with  respect  to  the  Exchange  Notes.  Upon  the
effectiveness  of the  Registration  Statement,  the  Issuers  will offer to the
holders of the Series B Notes and Series C Notes  pursuant to the Exchange Offer
who are able to make certain  representations  the opportunity to exchange their
Series B Notes or Series C Notes for Exchange  Notes. If (a) the Issuers are not
required to file the  Registration  Statement  or permitted  to  consummate  the
Exchange  Offer because the Exchange Offer is not permitted by applicable law or
Commission  policy  or (b) any  holder of  Transfer  Restricted  Securities  (as
defined   herein)   notifies  the  Issuers  prior  to  the  20th  day  following
consummation  of  the  Exchange  Offer  that  (i)  it is  prohibited  by  law or


                                       22
<PAGE>

Commission  policy from  participating in the Exchange Offer or (ii) that it may
not resell the Exchange Notes acquired by it in the Exchange Offer to the public
without delivering a prospectus and the prospectus contained in the Registration
Statement  is not  available  for such  resales,  the Issuers will file with the
Commission a shelf registration  statement (the "Shelf Registration  Statement")
to cover  resales  of the  Series C Notes by the  holders  thereof  who  satisfy
certain  conditions  relating to the provision of information in connection with
the Shelf  Registration  Statement.  The Issuers will use their  reasonable best
efforts to cause the applicable  registration statement to be declared effective
as  promptly  as  possible by the  Commission.  For  purposes of the  foregoing,
"Transfer Restricted  Securities" means each Series C Note until (A) the date on
which  such  Series  C  Note  has  been  exchanged  by a  person  other  than  a
broker-dealer  for an Exchange  Note in the Exchange  Offer,  (B)  following the
exchange  by a  broker-dealer  in the  Exchange  Offer of a Series C Note for an
Exchange  Note,  the date on which such Exchange Note is sold to a purchaser who
receives from such  broker-dealer  on or prior to the date of such a copy of the
prospectus contained in the Exchange Offer Registration Statement,  (C) the date
on which such Series C Note has been effectively registered under the Securities
Act and disposed of in accordance with the Shelf  Registration  Statement or (D)
the date on which such Series C Note is  distributed  to the public  pursuant to
Rule 144 under the Securities  Act or may be distributed to the public  pursuant
to Rule 144(k) under the Securities Act.

        The  Registration  Rights  Agreement  provides that (a) the Issuers will
file the Registration Statement with the Commission on or prior to 75 days after
the Issue Date, (b) the Issuers will use their  reasonable  best efforts to have
the Registration  Statement  declared effective by the Commission on or prior to
135 days  after the Issue  Date,  (c)  unless the  Exchange  Offer  would not be
permitted by applicable law or Commission  policy, the Issuers will commence the
Exchange Offer and use their  reasonable  best efforts to issue,  on or prior to
165  days  after  the  Issue  Date,  and  (d) if  obligated  to file  the  Shelf
Registration  Statement,  the Issuers will use their  reasonable best efforts to
file the Shelf Registration Statement with the Commission on or prior to 60 days
after  such  filing  obligation  arises  and to  cause  the  Shelf  Registration
Statement  to be declared  effective by the  Commission  on or prior to 120 days
after such obligation arises.

        The summary  herein of certain  provisions  of the  Registration  Rights
Agreement does not purport to be complete and is subject to, and is qualified in
its entirety by reference  to, all the  provisions  of the  Registration  Rights
Agreement, a copy of which is available without charge by writing to the Company
at 500 North Loop 1604 East,  Suite 100,  San Antonio,  Texas 78232,  Attention:
Secretary.

How to Tender

        A holder of the Series B Notes or Series C Notes may tender the Series B
Notes or Series C Notes by (a)  properly  completing  and  signing the Letter of
Transmittal  or a facsimile  thereof (all  references in this  Prospectus to the
Letter of  Transmittal  shall be deemed to  include  a  facsimile  thereof)  and
delivering  the same,  together  with the Series B Notes or Series C Notes being
tendered  (or a  confirmation  of an  appropriate  book-entry  transfer)  to the
Exchange  Agent on or prior to the  Expiration  Date or (b) requesting a broker,
dealer,  bank, trust company or other nominee to effect the transaction for such
holder prior to the Expiration Date.

        If Exchange  Notes are to be delivered to an address  other than that of
the  registered  holder  appearing on the note  register  (the "Note  Register")
maintained  by the  registrar  of the  Notes,  the  signature  on the  Letter of
Transmittal  must be guaranteed by a commercial  bank or trust company having an
office or correspondent in the United States,  or by a member firm of a national
securities exchange or the National Association of Securities Dealers, Inc. (any
of the  foregoing  is  hereinafter  referred to as an  "Eligible  Institution").
Exchange Notes will not be issued in the name of a person other than that of the
registered  holder of the Series B Notes or Series C Notes appearing on the Note
Register.

        The Exchange  Agent will establish an account with respect to the Series
B Notes and the Series C Notes at DTC within two business days after the date of
this Prospectus, and any financial institution which is a participant in DTC may
make book-entry delivery of the Series B Notes and the Series C Notes by causing
DTC to transfer such Series B Notes and Series C Notes into the Exchange Agent's
account in accordance with DTC's procedure for such transfer.  Although delivery
of the Series B Notes and the Series C Notes may be effected through  book-entry
transfer into the Exchange  Agent's  account at DTC, the Letter of  Transmittal,


                                       23
<PAGE>

with any required signature guarantees and any other required documents, must in
any case be transmitted to and received by the Exchange Agent on or prior to the
Expiration Date at one of its addresses set forth below under "Exchange  Agent",
or in  compliance  with  the  guaranteed  delivery  procedure  described  below.
DELIVERY OF DOCUMENTS TO DTC DOES NOT CONSTITUTE DELIVERY TO THE EXCHANGE AGENT.
All  references in this  Prospectus to deposit or delivery of Series B Notes and
Series C Notes shall be deemed to include DTC's book-entry delivery method.

        Notwithstanding  the  foregoing,  any  financial  institution  that is a
participant in the  Depository's  Book-Entry  Transfer  Facility system may make
book-entry  delivery of the Series B Notes and the Series C Notes by causing the
Depositary  to transfer such Series B Notes and Series C Notes into the Exchange
Agent's  account in  accordance  with the  Depository's  Automated  Tender Offer
Program ("ATOP") procedures for such book-entry transfers. However, the exchange
for the  Series B Notes  and the  Series C Notes so  tendered  will only be made
after timely  confirmation  (a  "Book-Entry  Confirmation")  of such  Book-Entry
Transfer of Existing Notes into the Exchange Agent's account, and timely receipt
by the Exchange Agent of an Agent's Message (as such term is defined in the next
sentence) and any other  documents  required by the Letter of  Transmittal.  The
term "Agent's Message" means a message,  transmitted by the Book-Entry  Transfer
Facility and  received by the Exchange  Agent and forming a part of a Book-Entry
Confirmation, which states that the Book-Entry Transfer Facility has received an
express acknowledgment from a participant tendering the Series B Notes or Series
C  Notes  that  is  the  subject  of  such  Book-Entry  Confirmation  that  such
participant  has  received  and agrees to be bound by the terms of the Letter of
Transmittal,  and that the Issuers  may  enforce  such  agreement  against  such
participant.

        THE METHOD OF  DELIVERY OF THE SERIES B NOTES AND SERIES C NOTES AND ALL
OTHER DOCUMENTS,  INCLUDING DELIVERY THROUGH DTC, IS AT THE ELECTION AND RISK OF
THE HOLDER.  IF SENT BY MAIL, IT IS RECOMMENDED  THAT  REGISTERED  MAIL,  RETURN
RECEIPT REQUESTED, BE USED, AND PROPER INSURANCE BE OBTAINED.

        If a holder  desires to tender Series B Notes or Series C Notes pursuant
to the Exchange Offer and such holder's Series B Notes or Series C Notes are not
immediately  available  or time will not  permit all of the above  documents  to
reach the Exchange  Agent prior to the  Expiration  Date,  or such holder cannot
complete the procedure of book-entry transfer on a timely basis, such tender may
be effected if the following conditions are satisfied:

        (a) such tenders are made by or through an Eligible Institution;

        (b)  a  properly  completed  and  duly  executed  Notice  of  Guaranteed
Delivery,  in substantially the form provided by the Issuers, is received by the
Exchange Agent as provided below on or prior to the Expiration Date; and

        (c) the Series B Notes or Series C Notes,  in proper  form for  transfer
(or confirmation of book-entry transfer of such Series B Notes or Series C Notes
into the Exchange  Agent's account at DTC as described  above),  together with a
properly  completed  and duly  executed  Letter  of  Transmittal  and all  other
documents  required by the Letter of  Transmittal,  are received by the Exchange
Agent within three New York Stock Exchange,  Inc. trading days after the date of
execution of such Notice of Guaranteed Delivery.

        The  Notice  of  Guaranteed   Delivery  may  be  delivered  by  hand  or
transmitted by facsimile  transmission  or mailed to the Exchange Agent and must
include a  guarantee  by an Eligible  Institution  in the form set forth in such
Notice of Guaranteed Delivery.

        A tender  will be deemed to have been  received  as of the date when the
tendering  holder's duly signed Letter of  Transmittal  accompanied  by Series B
Notes or  Series C Notes  (or a timely  confirmation  received  of a  book-entry
transfer of Series B Notes or Series CNotes into the Exchange Agent's account at
DTC) or a Notice of Guaranteed Delivery from an Eligible Institution is received
by the  Exchange  Agent.  Issuances  of Exchange  Notes in exchange for Series B
Notes or Series C Notes tendered pursuant to a Notice of Guaranteed  Delivery by
an  Eligible  Institution  will be made only  against  delivery of the Letter of


                                       24
<PAGE>

Transmittal  (and any other required  documents) and the tendered Series B Notes
or Series C Notes (or a timely confirmation received of a book-entry transfer of
Series B Notes or Series C Notes into the Exchange  Agent's account at DTC) with
the Exchange Agent.

        Partial  tenders of Series B Notes or Series C Notes may be made only if
(i) the  principal  amount  tendered is equal to $1,000 or an integral  multiple
thereof;  and (ii) the remaining  untendered portion of such Series B Notes or C
Note is in a principal amount of $250,000, or any integral multiple of $1,000 in
excess of such amount.  Holders  tendering less than the entire principal amount
of any Series B Note or Series C Note they hold in accordance with the foregoing
restrictions must appropriately  indicate such fact on the Letter of Transmittal
accompanying the tendered Series B Note or Series C Note.

        With respect to tenders of Series B Notes or Series C Notes, the Issuers
reserve full discretion to determine  whether the  documentation is complete and
generally  to  determine  all  questions  as to tenders,  including  the date of
receipt of a tender,  the  propriety  of execution  of any  document,  and other
questions as to the validity,  form, eligibility or acceptability of any tender.
The  Issuers  reserve  the  right to reject  any  tender  not in proper  form or
otherwise not valid or the  acceptance for exchange of which may, in the opinion
of  the  Issuers'  counsel,  be  unlawful  or to  waive  any  irregularities  or
conditions,  and the Issuers'  interpretation of the terms and conditions of the
Exchange Offer (including the instructions on the Letter of Transmittal) will be
final and binding.  The Issuers and the Exchange Agent shall not be obligated to
give notice of any defects or  irregularities in tenders and shall not incur any
liability for failure to give any such notice. The Exchange Agent may, but shall
not be obligated  to, give notice of any  irregularities  or defects in tenders,
and shall not incur any liability  for any failure to give any such notice.  The
Series B Notes or  Series C Notes  shall  not be  deemed  to have  been  duly or
validly tendered unless and until all defects and irregularities have been cured
or waived. All improperly  tendered Series B Notes or Series C Notes, as well as
Series B Notes or Series C Notes in excess of the principal  amount tendered for
exchange,  will be returned (unless  irregularities and defects are timely cured
or waived),  without cost to the  tendering  holder (or, in the case of Series B
Notes or Series C Notes  delivered by  book-entry  transfer  within DTC, will be
credited to the account  maintained  within DTC by the  participant in DTC which
delivered such shares), promptly after the Expiration Date.

Terms and Conditions of the Letter of Transmittal

        The Letter of Transmittal  contains,  among other things,  certain terms
and conditions which are summarized below and are part of the Exchange Offer.

        Each holder who  participates  in the Exchange Offer will be required to
represent  that  any  Exchange  Notes  received  by it will be  acquired  in the
ordinary course of its business, unless it is a Participating Broker-Dealer,  it
is not  engaging  and does not  intend  to  engage  in the  distribution  of the
Exchange  Notes,  that at the time of  consummation  of the Exchange  Offer such
holder will have no arrangement or understanding  with any person to participate
in the  distribution  of the Exchange Notes in violation of the provision of the
Securities Act, that such holder is not an "affiliate" of the Issuers within the
meaning of the Securities Act and that if it  participates in the Exchange Offer
for the  purpose of  distributing  the  Exchange  Notes it must  comply with the
registration  and  prospectus  delivery  requirements  of the  Securities Act in
connection with any resale of the Exchange Notes.

        The  Series B Notes and  Series C Notes  tendered  in  exchange  for the
Exchange Notes (or a timely confirmation of a book-entry transfer of such Series
B Notes and Series C Notes  into the  Exchange  Agent's  account at DTC) must be
received by the Exchange  Agent,  with the Letter of  Transmittal  and any other
required  documents,  by  5:00  p.m.,  New  York  City  time,  on  or  prior  to
___________,  1998, unless extended,  or within the time periods set forth above
in "-- How to  Tender"  pursuant  to a Notice  of  Guaranteed  Delivery  from an
Eligible  Institution.  The party tendering the Series B Notes or Series C Notes
for exchange (the "Holder") will sell, assign and transfer the Series B Notes or
Series C Notes to the Exchange Agent,  as agent of the Issuers,  and irrevocably
constitute   and  appoint  the  Exchange   Agent  as  the  Holder's   agent  and
attorney-in-fact to cause the Series B Notes or Series C Notes to be transferred
and  exchanged.  The Holder will warrant that it has full power and authority to
tender, exchange, sell, assign and transfer the Series B Notes or Series C Notes
and to acquire the Exchange  Notes  issuable  upon the exchange of such tendered
Series B Notes or Series C Notes,  the Exchange  Agent, as agent of the Issuers,
will  acquire  good and  unencumbered  title to the  tendered  Series B Notes or
Series  C  Notes,  free  and  clear  of all  liens,  restrictions,  charges  and


                                       25
<PAGE>

encumbrances,  and that  the  Series B Notes  or  Series  C Notes  tendered  for
exchange are not subject to any adverse claims or  encumbrance  when accepted by
the Exchange Agent,  as agent of the Issuers.  The Holder will also covenant and
agree that it will, upon request,  execute and deliver any additional  documents
deemed by the Issuers or the  Exchange  Agent to be  necessary  or  desirable to
complete the exchange,  sale,  assignment  and transfer of the Series B Notes or
Series C Notes. All authority  conferred or agreed to be conferred in the Letter
of  Transmittal by the Holder will survive the death or incapacity of the Holder
and any  obligation  of the  Holder  shall be binding  upon the heirs,  personal
representatives, successors and assigns of such Holder.

        Signature(s)  on the  Letter  of  Transmittal  will  be  required  to be
guaranteed  as set forth above in "-- How to Tender."  All  questions  as to the
validity, form, eligibility (including time of receipt) and acceptability of any
tender will be determined  by the Issuers,  in their sole  discretion,  and such
determination  will  be  final  and  binding.  Unless  waived  by  the  Issuers,
irregularities  and defects must be cured by the  Expiration  Date.  The Issuers
will pay all security  transfer  taxes,  if any,  applicable to the transfer and
exchange of the Series B Notes and the Series C Notes tendered.

Withdrawal Rights

        All tenders of the Series B Notes and Series C Notes may be withdrawn at
any time prior to acceptance thereof on the Expiration Date. To be effective,  a
notice  of  withdrawal  must be timely  received  by the  Exchange  Agent at the
address set forth below under "--Exchange  Agent." Any notice of withdrawal must
specify the person  named in the Letter of  Transmittal  as having  tendered the
Series B Notes  or  Series C Notes  to be  withdrawn.  If the  Series B Notes or
Series C Notes  have  been  physically  delivered  to the  Exchange  Agent,  the
tendering  holder must also  submit the serial  number  shown on the  particular
Series B Notes  or  Series C Notes  to be  withdrawn.  If the  Series B Notes or
Series C Notes have been  delivered  pursuant to the  book-entry  procedures set
forth above under "--How to Tender," any notice of  withdrawal  must specify the
name and  number of the  participant's  account at DTC to be  credited  with the
withdrawn  Series B Notes or Series C Notes.  The Exchange Agent will return the
properly  withdrawn  Series  B Notes or  Series  C Notes as soon as  practicable
following  receipt of notice of  withdrawal.  All  questions as to the validity,
including time of receipt,  of notices of withdrawals  will be determined by the
Issuers, and such determinations will be final and binding on all parties.

Acceptance of Tenders

        Subject to the terms and conditions of the Exchange Offer, including the
reservation of certain rights by the Issuers,  the Series B Notes and the Series
C Notes tendered (either physically or through book-entry  delivery as described
in "-- How to Tender") with a properly  executed  Letter of Transmittal  and all
other required documentation, and not withdrawn, will be accepted promptly after
the Expiration Date. Subject to such terms and conditions,  Exchange Notes to be
issued in exchange for properly  tendered Series B Notes and Series C Notes will
either be mailed by the Exchange  Agent or credited to the  holder's  account in
accordance  with  the  appropriate  book-entry  procedures  promptly  after  the
acceptance  of the  properly  tendered  Series  B  Notes  and  Series  C  Notes.
Acceptance of Series B Notes and Series C Notes will be effected by the delivery
of a notice to that effect by the Issuers to the Exchange Agent.  Subject to the
applicable  rules of the Commission,  the Issuers,  however,  reserve the right,
prior to the acceptance of tendered  Series B Notes and Series C Notes, to delay
acceptance of tendered  Series B Notes and Series C Notes upon the occurrence of
any of the  conditions  set forth above under the caption "--  Conditions."  The
Issuers  confirm  that their  reservation  of the right to delay  acceptance  of
tendered  Series B Notes and Series C Notes is subject to the provisions of Rule
14e-1(c)  under  the 1934 Act  which  requires  that a  tender  offeror  pay the
consideration  offered  or return the  tendered  securities  promptly  after the
termination or withdrawal of a tender offer.

        Although  the Issuers do not  currently  intend to do so, if they modify
the terms of the Exchange  Offer,  such modified  terms will be available to all
holders  of Series B Notes and  Series C Notes,  whether  or not their  Series B
Notes and  Series C Notes have been  tendered  prior to such  modification.  Any
material  modification will be disclosed in accordance with the applicable rules
of the  Commission  and, if  required,  the  Exchange  Offer will be extended to
permit  holders of Series B Notes and Series C Notes  adequate  time to consider
such modification.

                                       26
<PAGE>

        The tender of Series B Notes and Series C Notes  pursuant  to any one of
the  procedures  set forth in "-- How to Tender"  will  constitute  an agreement
between the  tendering  holder and the Issuers upon the terms and subject to the
conditions of the Exchange Offer.

                                       27
<PAGE>


                                 EXCHANGE AGENT

        IBJ Schroder Bank & Trust Company has been  appointed as Exchange  Agent
for the Exchange Offer. Letters of Transmittal must be addressed to the Exchange
Agent as follows:

  If Delivery By Mail:                      If Delivered By Courier or By Hand:

  IBJ Schroder Bank & Trust Company         IBJ Schroder Bank & Trust Company
  One State Street                          One State Street
  New York, New York, 10004                 New York, New York 10004
 Attention: Reorganization                  Attention:Processing Window, 
   Operations Department                    Securities Subcellar One (SC-1)

        Delivery to other than the above  addresses  will not  constitute  valid
delivery.

Solicitation of Tenders; Expenses

        Except as described above under  "Exchange  Agent," the Issuers have not
retained any agent in connection  with the Exchange  Offer and will not make any
payments to brokers,  dealers or other persons for  soliciting  or  recommending
acceptances of the Exchange  Offer.  The Issuers will,  however pay the exchange
agent  reasonable  and customary  fees for its services and will,  reimburse the
Exchange  Agent  for  its  reasonable   out-of-pocket   expenses  in  connection
therewith.  The Issuers  will also pay  brokerage  houses and other  custodians,
nominees and fiduciaries the reasonable  out-of-pocket expenses incurred by them
in forwarding  copies of this Prospectus and related documents to the beneficial
owners  of the  Series  B  Notes  and the  Series  C Notes  and in  handling  or
forwarding tenders for their customers.

                                       28
<PAGE>


                                 USE OF PROCEEDS

        The Issuers  will not receive any  proceeds as a result of the  Exchange
Offer.

        The net  proceeds to the Issuers from the  Offering  were  approximately
$62.7 million after deducting  discounts and estimated offering expenses payable
by the Issuers.  The Issuers  utilized  the net proceeds  primarily to repay all
indebtedness  outstanding  under the Credit Facility  (except for $100,000 which
remained  outstanding)  and for general  corporate  purposes,  including  future
acquisitions and the development of producing properties. Indebtedness under the
Credit  Facility was incurred in connection  with certain  acquisitions  and for
general corporate  purposes,  has an initial revolving term expiring in November
1998 and a reducing  period of three years from November 1998 and bears interest
based on a facility  usage grid and upon  either an  adjusted  rate of LIBOR (as
defined herein) or the prime rate of BTCo.

                                 CAPITALIZATION

        The following table sets forth the total consolidated  capitalization of
the Issuers at December 31, 1997, on an historical basis and as-adjusted to give
effect  to the  Offering.  This  table  should be read in  conjunction  with the
Consolidated  Financial  Statements of the Company and the notes thereto and the
other financial information included elsewhere in this Prospectus.
<TABLE>
<CAPTION>

                                                            December 31, 1997
                                                       Actual             As Adjusted
                                                   -----------------------------------
                                                         (dollars in thousands)
<S>                                                <C>                   <C>          
Cash and cash equivalents                          $        2,836        $      32,186
                                                   ==============        =============
Total debt, including current maturities:
   Other long-term obligation                               2,117                2,117
   Credit Facility                                         31,500                  100
   111/2% Senior Notes due 2004, Series B                 215,000              215,000
     111/2% Senior Notes due 2004, Series C                    --               60,000
      Premium on Series C Notes                    $           --        $       4,050
                                                   --------------        -------------
        Total debt                                        248,617              281,267

Stockholders' equity:
   Common  stock,  $.01  par  value;   50,000,000
shares  authorized; 6,422,540 shares issued                    63                   63
   Additional paid-in capital                              51,118               51,118
   Accumulated deficit                                    (19,185)             (19,185)
   Treasury stock, 53,023 shares                             (281)                (281)
   Accumulated other comprehensive income (loss)           (4,902)              (4,902)
                                                   --------------        -------------
        Total stockholders' equity                         26,813               26,813
                                                   --------------        -------------
        Total capitalization                       $      275,430        $     308,080
                                                   ==============        =============
</TABLE>

                                       29
<PAGE>
                      SELECTED CONSOLIDATED FINANCIAL DATA

        The  following  historical  selected  consolidated  financial  data  are
derived  from,  and  qualified  by  reference  to,  the  Company's  Consolidated
Financial  Statements  and  the  notes  thereto.  The  historical   consolidated
financial data should be read in  conjunction  with the  Consolidated  Financial
Statements  of the  Company and the notes  thereto  included  elsewhere  in this
Prospectus and "Management's  Discussion and Analysis of Financial Condition and
Results of Operations."
<TABLE>
<CAPTION>
                                                               Year Ended December 31,
                                      ---------------------------------------------------------------------
                                         1993           1994          1995           1996          1997
                                         ----           ----          ----           ----          ----
Consolidated Statements of Operations                (dollars in thousands except per share data)
<S>                                     <C>           <C>           <C>            <C>           <C>  
Operating revenue:
Oil and gas production sales            $7,275        $11,114       $13,660        $25,749       $65,826
Gas processing revenue                      --             --            --            600         3,568
Other revenue                              219            235           157            304         1,537
                                        ------         ------        ------         ------        ------
Total operating revenue                  7,494         11,349        13,817         26,653        70,931
                                        ------         ------        ------         ------        ------
Operating costs and expenses:
Lease operating and production taxes     2,896          3,693         4,333          5,858        14,881
Gas processing costs                        --             --            --            262         1,252
Depreciation, depletion and
    amortization                         2,373          3,790         5,434          9,605        30,581
General and administrative expenses        510            810         1,042          1,933         4,171
Other                                      103            133           125            169           296
Proved property impairment                  --             --            --             --         4,600
                                        ------         ------        ------         ------        ------
Total operating expenses                 5,882          8,426        10,934         17,827        55,781
                                        ------         ------        ------         ------        ------
Operating income (loss)                  1,612          2,923         2,883          8,826        15,150
Net interest expense                     2,492          2,343         3,877          5,987        24,300
Amortization of deferred financing
    fees (1)                               649            400           214            280         1,260
Other (income) expense                    (136)            67            --            443           (34)
                                        ------         ------        ------         ------        ------
Income (loss) from continuing
    operations before tax and   
     extraordinary items                (1,393)           113        (1,208)         2,116       (10,376)
Deferred income tax (expense) benefit     (187)            --            --           (176)        3,891
Loss from discontinued operations (2)     (280)        (1,335)           --             --            --
                                        ------         ------        ------         ------        ------
Income  (loss)  before  extraordinary
    items                               (1,860)        (1,222)       (1,208)         1,940        (6,485)
Extraordinary items (3)                   (573)        (1,172)           --           (427)           --
                                        ------         ------        ------         ------        ------
Net income (loss)                       (2,433)        (2,394)       (1,208)         1,513        (6,485)
Preferred dividends requirement           (186)          (183)         (366)          (366)         (183)
                                        ------         ------        ------         ------        ------
Net income (loss) applicable  to
    common stockholders                $(2,619)       $(2,577)      $(1,574)        $1,147       $(6,668)
                                       =======        =======       =======         ======        =======
Earnings (loss) per common share:
    Income (loss) from continuing       
      operations                        $ (0.91)       $ (0.02)      $ (0.34)       $  0.27      $ (1.11)
    Discontinued operations               (0.14)         (0.31)          --             --            --
    Extraordinary items                   (0.29)         (0.27)          --           (0.07)          --
                                        -------        --------      -------        -------       -------
Net income (loss) per common share      $ (1.34)       $ (0.60)      $ (0.34)       $  0.20      $ (1.11)
                                        =======        =======       =======        =======       =======
Weighted average shares outstanding       1,947          4,310         4,635          5,757        6,025
                                        =======        =======       =======        =======       =======
Earnings (loss) per common share -
    assuming dilution:
    Income (loss) from continuing
      operations                        $ (0.91)       $ (0.02)      $ (0.34)       $  0.23      $ (1.11)
    Discontinued operations               (0.14)         (0.31)          --             --            --
    Extraordinary items                   (0.29)         (0.27)          --           (0.06)          --
                                        -------        -------       -------        --------       ------
    Net income (loss) per common
    share assuming dilution             $ (1.34)       $ (0.60)      $ (0.34)       $  0.17      $ (1.11)
                                        =======        =======       =======        ========      =======
Weighted average shares outstanding       1,947          4,310         4,635          6,794        6,025
                                        =======        =======       =======        ========      =======
</TABLE>
                                       30
<PAGE>

<TABLE>
<CAPTION>


                                                                        At December 31,
                                      ---------------------------------------------------------------------
                                         1993           1994          1995           1996          1997
                                                               (dollars in thousands)

Consolidated Balance Sheet Data:
<S>                                   <C>            <C>           <C>            <C>           <C>     
Working capital (deficit) (4)          $(1,368)       $(1,605)      $ 2,633        $ 6,433       $(9,144)
Total assets                            43,396         75,361        85,067        304,842       338,528
Long-term debt (5)                      12,484         41,235        41,557        215,000       248,596
Stockholders' equity                    25,143         28,502        37,063         35,656        26,813
- ---------------
</TABLE>

(1) Consists of financing  fees incurred in connection  with the issuance of the
    Notes and the Credit Facility.
(2) Discontinued  operations  consist  primarily of coal  operations  which were
    terminated  in January 1995.  The Company  anticipates  no additional  costs
    associated with coal operations in the future. See "Management's  Discussion
    and Analysis of Financial  Condition and Results of Operations -- Results of
    Operations."
(3) Consists of loss incurred in connection with extinguishment of debt.
(4) Includes current maturities of long-term debt and capital lease obligations.
(5) Excludes current maturities of long-term debt and capital lease obligations.


                                       31
<PAGE>



                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS

        The  following is a discussion  of the  Company's  financial  condition,
results of operations,  liquidity and capital resources.  This discussion should
be read in conjunction with the Consolidated Financial Statements of the Company
and the notes thereto included elsewhere in this Prospectus.

Results of Operations

        The factors which most  significantly  affect the  Company's  results of
operations  are (1) the sales  prices of crude  oil,  natural  gas  liquids  and
natural  gas,  (2) the level of total  sales  volumes of crude oil,  natural gas
liquids and natural gas, (3) the level of and interest  rates on borrowings  and
(4) the level and success of exploration and development activity.

        Selected   Operating  Data.  The  following  table  sets  forth  certain
operating data of the Company for the periods presented:
<TABLE>
<CAPTION>

                                                      Years Ended December 31,
                                          -------------------------------------------------
                                             (dollars in thousands, except per unit data)

                                               1995              1996             1997
                                          ----------------  ---------------  ---------------
<S>                                          <C>               <C>              <C>   
Operating revenue:
  Crude oil sales                            $  5,218          $  8,864         $ 17,453
  NGLs sales                                    1,553             4,359           10,668
  Natural gas sales                             6,889            12,526           37,705
  Gas Processing revenue                            -               600            3,568
  Other                                           157               304            1,537
                                          ================  ===============  ===============
Total operating revenue                      $ 13,817          $ 26,653         $ 70,931
                                          ================  ===============  ===============

Operating income                             $  2,883          $  8,826         $ 15,150

Crude oil production (MBbls)                    401.4             425.2            936.7
NGLs production (MBbls)                         143.4             299.5            992.3
Natural gas production (MMcf)                 3,552.7           6,350.0         21,050.0

Average crude oil sales prices (per Bbl)     $  17.16          $  20.85         $  18.63
Average NGLs sales price (per Bbl)           $  10.83          $  14.55         $  10.75
Average natural gas sales price (per Mcf)    $   1.47          $   1.97         $   1.79

</TABLE>

Comparison of Year Ended December 31, 1997 to Year Ended December 31, 1996

        Operating  Revenue.  During the year ended December 31, 1997,  operating
revenue from crude oil,  natural gas and natural gas liquids sales,  and natural
gas processing revenues increased by $43.1 million from $26.3 million in 1996 to
$69.4 million in 1997.  This increase was  primarily  attributable  to increased
volumes which were  partially  offset by a decline in commodity  prices.  Volume
increased from 1,783 MBOE to 5,437 MBOE for the year ended December 1997.  Crude
oil and natural gas liquids sales volumes increased by 166% to 1,929 MBOE during
1997 compared to 725 MBOE in 1996,  natural gas sales volumes  increased by 231%
to 21.1 Bcf in 1997  compared to 6.3 Bcf in 1996.  The increases in volumes were
attributable to a full year of production from property  acquisitions  completed
during the fourth quarter of 1996 as well as increased  production  attributable
to  the  Company's  ongoing   development   program  on  existing  and  acquired
properties.   Acquisitions  and  the  subsequent  development  of  the  acquired
properties  contributed  1,182 MBbls of oil and natural gas liquids and 15.9 Bcf
of natural gas. Development of existing properties  contributed 747 MBbls of oil


                                       32
<PAGE>

and natural gas liquids and 5.2 Bcf of natural gas during  1997.  Average  sales
prices in 1997 were  $18.63 per Bbl of crude oil,  $10.75 per Bbl of natural gas
liquid and $1.79 per Mcf of natural gas compared to $20.85 per Bbl of crude oil,
$14.55 per Bbl of natural  gas liquids and $1.97 per Mcf of natural gas in 1996.
The Company also had gas processing  revenue of $3.6 million in 1997 as a result
of the  acquisition  of CGGS in November  1996.  Prior to the  acquisition,  the
Company was not engaged in third party gas processing.

        Lease Operating  Expenses.  Lease operating expenses ("LOE") and natural
gas processing costs,  increased by $10.0 million from $6.1 million for the year
ended  December  31,  1996 to $16.1  million  for the same  period of 1997.  LOE
increased by $9.0 million to $14.9 million  primarily due to the greater  number
of wells owned by the Company for the year ended  December 31, 1997  compared to
the year ended  December 31, 1996. The Company's LOE on a per BOE basis for 1997
was $2.74 per BOE as compared to $3.28 per BOE in 1996.  Natural gas  processing
cost  increased  to $1.3  million in 1997 as compared  to $262,000 in 1996.  The
increase  in gas  processing  expense  was  due to the  acquisition  of  CGGS in
November 1996.  Prior to the  acquisition,  the Company was not engaged in third
party gas processing

        G & A Expenses.  General and administrative ("G & A") expenses increased
from $1.9  million for the year ended  December 31, 1996 to $4.2 million for the
year ended  December 31, 1997,  as a result of the Company's  hiring  additional
staff,  including  an increase  in  personnel  to manage and develop  properties
acquired in the fourth quarter of 1996. The Company's G & A expense on a per BOE
basis was $0.77 per BOE in 1997 compared to $1.08 per BOE for 1996.

        DD & A Expenses.  Due to the increase in sales  volumes of crude oil and
natural  gas,  depreciation,  depletion  and  amortization  ("DD  & A")  expense
increased by $21.0  million  from $9.6  million for the year ended  December 31,
1996 to $30.6 million for the year ended  December 31, 1997.  The Company's DD&A
expense on a per BOE basis for 1997 was $5.62 per BOE as  compared  to $5.38 per
BOE in 1996.

        Interest  Expenses  and  Preferred   Dividends.   Interest  expense  and
preferred  dividends  increased  by $18.1  million  from $6.4  million  to $24.5
million for the year end December 31, 1997,  compared to 1996. This increase was
attributable to increased  borrowings by the Company to finance the acquisitions
consummated  during 1996. In November  1996,the  Company  issued $215 million in
principal amount of the Series B Notes. During 1997, the Company made additional
borrowings  under the Credit  Facility.  Long-term  debt  increased  from $215.0
million at December  31, 1996 to $248.6  million at December  31,  1997.  During
1997,  the Company paid $183,000 in preferred  dividends as compared to $366,000
in 1996.  Preferred  dividends were  eliminated on July 1, 1997 as the result of
the conversion of all outstanding preferred stock into Abraxas Common Stock.

        Ceiling Limitation Writedown.  The Company records the carrying value of
its  crude  oil and  natural  gas  properties  using  the full  cost  method  of
accounting  for  oil  and  gas  properties.   Under  this  method,  the  Company
capitalizes the cost to acquire, explore for and develop oil and gas properties.
Under the full cost accounting  rules, the net capitalized cost of crude oil and
natural gas properties less related deferred taxes,  are limited by country,  to
the lower of the unamortized cost or the cost ceiling, defined as the sum of the
present value of estimated unescalated future net revenues from proved reserves,
discounted at 10%, plus the cost of properties not being  amortized if any, plus
the lower of cost or estimated fair value of unproved properties included in the
costs being amortized, if any, less related income taxes. If the net capitalized
cost of crude oil and natural gas  properties  exceeds  the ceiling  limit,  the
Company  is  subject  to a ceiling  limitation  writedown  to the extent of such
excess.  A ceiling  limitation  writedown is a charge to earnings which does not
impact cash flow from operating  activities.  However, such writedowns do impact
the amount of the Company's stockholders' equity. The risk that the Company will
be required to writedown the carrying value of its oil and gas assets  increases
when oil and gas prices are depressed or volatile.  In addition,  writedowns may
occur if the Company has substantial  downward revisions in its estimated proved
reserves or if purchasers or  governmental  action cause an abrogation of, or if
the Company  voluntarily  cancels,  long-term contracts for its natural gas. For
the year ended  December  31,  1997,  the Company  recorded a writedown  of $4.6
million,  $3.0  million  after  tax,  related  to its  Canadian  properties.  No
assurance  can  be  given  that  the  Company  will  not  experience  additional
writedowns in the future. Should commodity prices continue to decline, a further
writedown  of the  carrying  value of the  Company's  crude oil and  natural gas
properties  may be  required.  See Note 16 of Notes  to  Consolidated  Financial
Statements.

                                       33
<PAGE>

Comparison of Year Ended December 31, 1996 to Year Ended December 31, 1995

        Operating  Revenue.  During the year ended December 31, 1996,  operating
revenue from crude oil,  natural gas and natural gas liquids sales,  and natural
gas  processing  revenues  increased  92% from  $13.7  million  in 1995 to $26.3
million.  This increase was primarily  attributable  to increased  crude oil and
natural gas  liquids  sales  volumes of 33.0% and  natural gas sales  volumes of
78.7%  which  was  attributable  to  increased  production  from  the  producing
properties  that the  Company  owned for the  entire  year as well as  producing
properties  acquired during the year. This increase more than offset the loss of
operating  revenue the Portilla and Happy fields  during the portion of the year
that the Company did not own the properties.  The Company sold these  properties
in March 1996 and reacquired these properties in November 1996. During 1995, the
Portilla and Happy Fields contributed $4.6 million in operating revenue compared
to $2.0 million in 1996.  Crude oil and NGLs sales  volumes  increased  from 545
MBbls to 725 MBbls,  from 1995 to 1996 and natural gas sales  volumes  increased
from 3.6 BCF to 6.4 BCF,  from 1995 to 1996 as a result of increased  production
volumes from the Company's  properties  other than Portilla and Happy in 1996 as
compared to 1995 and the  acquisitions  of the Wyoming  Properties,  the capital
stock of CGGS and the Company's ongoing development  drilling program.  Portilla
and Happy contributed 226.0 MBbls of crude oil and NGLs (41.5% of Company total)
and 492.6 MMcf of natural gas (13.9% of Company  total)  during 1995 as compared
to 91.7 MBbls of crude oil and NGLs  (12.7% of Company  total) and 215.6 MMcf of
natural gas (3.4% of Company  total) for 1996.  Average sales prices were $20.85
per Bbl of crude oil, $14.55 per Bbl of natural gas liquids and $1.97 per Mcf of
natural gas for the year ended December 31, 1996 compared with $17.16 per Bbl of
crude oil,  $10.83  per Bbl of natural  gas liquid and $1.47 per MMcf of natural
gas for the year ended December 31, 1995. A general  strengthening  of crude oil
and natural gas prices at the wellhead  during 1996 resulted in a higher average
sales  prices  received by the Company  during the year ended  December 31, 1996
compared to the same period in 1995.

        Lease Operating Expenses. LOE and natural gas processing costs increased
by 41.2% from $4.3 million for the year ended  December 31, 1995 to $6.1 million
for the same period of 1996,  primarily due to the greater number of wells owned
by the Company for the year ended  December 31, 1996  compared to the year ended
December 31, 1995.  The  Company's LOE on a per BOE basis for 1996 was $3.28 per
BOE as compared to $3.81 per BOE in 1995.

        G & A Expenses. G & A expenses increased 85.5% from $1.0 million for the
year ended  December 31, 1995,  to $1.9 million for the year ended  December 31,
1996,  as  a  result  of  the  Company's  hiring  additional  staff,   including
establishment  of a Canadian  administrative  office,  to manage the  additional
properties  acquired  by  the  Company  and  subsequent   development  of  those
properties.  The Company's G & A expense on a per BOE basis was $1.08 per BOE in
1996 compared to $0.92 per BOE for 1995.

        DD & A Expenses.  Due to the increase in sales  volumes of crude oil and
natural gas, DD & A expense increased 76.8% from $5.4 million for the year ended
December  31, 1995 to $9.6 million for the year ended  December  31,  1996.  The
Company's DD&A expense on a per BOE basis for 1996 was $5.38 per BOE as compared
to $4.78 per BOE in 1995.

        Interest Expense and Preferred Dividends. Interest expense and preferred
dividends  increased  54.5%,  from $4.3 million to $6.6 million for the year end
December 31, 1996, compared to the 1995 period. This increase is attributable to
increased  borrowings  by the  Company to finance the  acquisitions  consummated
during 1996. Long-term debt increased from $41.6 million at December 31, 1995 to
$215.0 million at December 31, 1996.

General

        The Company has incurred operating losses and net losses for a number of
years.  The  Company's  revenues,  profitability  and future  rate of growth are
substantially dependent upon prevailing prices for crude oil and natural gas and
the volumes of crude oil,  natural  gas and natural gas liquids  produced by the


                                       34
<PAGE>

Company.  Natural gas prices increased  substantially  during 1996; however, gas
prices and crude oil  weakened  somewhat  during  1997.  Crude oil  prices  have
continued to be depressed  during 1998. The average  natural gas prices realized
by the  Company  were  $1.79  per Mcf in 1997  compared  with  $1.97  per Mcf at
December 31, 1996 and $1.47 per Mcf at December 31, 1995. During 1997, crude oil
prices averaged $18.63 per Bbl compared to $20.85 during 1996 and $17.16 per Bbl
during 1995.  Although  the Company had  operating  and net income  during 1996,
losses  were  incurred  in 1995 and  1997 and  there  can be no  assurance  that
operating  income  and net  earnings  will be  achieved  in future  periods.  In
addition,  because the  Company's  proved  reserves  will  decline as crude oil,
natural  gas and  natural  gas  liquids  are  produced,  unless  the  Company is
successful  in  acquiring  properties  containing  proved  reserves  or conducts
successful  exploration and development  activities,  the Company's reserves and
production will decrease.  If crude oil prices remain at depressed  levels or if
natural gas prices return to depressed  levels,  or if the Company's  production
levels  decrease,  the  Company's  revenues,   cash  flow  from  operations  and
profitability will be materially adversely affected.

Liquidity and Capital Resources

        General. Capital expenditures in 1995, 1996 and 1997 were $12.3 million,
$173.2 million and $87.8 million,  respectively.  The table below sets forth the
components of these  capital  expenditures  on a historical  basis for the three
years ended December 31, 1995, 1996 and 1997.

                                          Year Ended December 31
                                    -----------------------------------
                                           (dollars in thousands)

                                       1995         1996         1997
                                       ----         ----         ----
Expenditure category:
     Property acquisitions (1)       $     719   $ 154,484    $  24,210
     Development                        11,472      18,465       61,414
     Facilities and other                  139         206        2,140
                                    ----------  ----------   ----------
     Total                           $  12,330   $ 173,155    $  87,764
- ------------------------

        (1)  Acquisition  cost  includes  7,585,000  common shares and 4,000,000
special warrants of Cascade Oil & Gas, Ltd. valued at approximately $3.7 million
in 1997  related  to the  acquisition  of  certain  crude  oil and  natural  gas
properties.

        Acquisitions  of crude oil and natural gas producing  properties  during
1996 accounted for the majority of the capital  expenditures made by the Company
during  1996.  During  1995  and  1997,  expenditures  were  primarily  for  the
development  of existing  properties.  These  expenditures  were funded  through
internally generated cash flow and borrowings under the Credit Facility.

        At December 31, 1997,  the Company had current  assets of $18.3  million
and current  liabilities of $27.5 million resulting in a working capital deficit
of $9.2 million.  This  compares to working  capital of $6.4 million at December
31, 1996.  The material  components  of the  Company's  current  liabilities  at
December 31, 1997 include trade accounts payable of $17.1 million,  revenues due
third   parties  of  $2.8  million  and  accrued   interest  of  $4.6   million.
Stockholders'  equity decreased from $35.7 million at December 31, 1996 to $26.8
million at  December  31,  1997  primarily  due to a net loss  incurred in 1997,
including  the  impact of the  impairment  of the full cost pool.  See  "Ceiling
Limitation Writedown"

        The Company's  current  budget for capital  expenditures  for 1998 other
than acquisition  expenditures is $68.4 million.  Such expenditures will be made
primarily  for  the  development  of  existing  properties.  Additional  capital
expenditures  may be  made  for  acquisition  of  producing  properties  if such
opportunities  arise, but the Company currently has no agreements,  arrangements
or undertakings regarding any material acquisitions. The Company has no material
long-term  capital  commitments and is consequently  able to adjust the level of
its expenditures as circumstances  dictate.  Additionally,  the level of capital


                                       35
<PAGE>

expenditures  will vary during future periods depending on market conditions and
other  related  economic  factors.  Should  the price of crude oil  continue  to
decline,  the Company's cash flows will decrease which may result in a reduction
of the capital expenditures budget.

      The Company will have three principal sources of liquidity during the next
12 months:  (i) cash on hand,  including the net proceeds of the offering of the
Series C Notes, (ii) borrowing capacity under the Credit Facility and (iii) cash
generated by operations.  While the availability of capital  resources cannot be
predicted  with  certainty and is dependent  upon a number of factors  including
factors  outside  of  management's  control,  management  believes  that the net
proceeds of the  offering of the Series C Notes,  the  Company's  cash flow from
operations plus availability  under the Credit Facility will be adequate to fund
operations  and  planned  capital  expenditures.   The  Company  may  also  sell
additional  equity or debt  securities in order to fund  operations  and planned
capital expenditures as well as to finance future acquisitions.

      The Credit Facility has an  availability of $40.0 million.  As of December
31, 1997,  there was $31.5  million  outstanding  under the Credit  Facility.  A
portion  of the  proceeds  of the  offering  of the  Series C Notes were used to
re-pay the outstanding balance of the Credit Facility (except for $100,000 which
remains outstanding).

      Operating  activities  for the year ended December 31, 1997 provided $36.6
million of cash to the Company.  Investing  activities  required  $74.5  million
during  1997  primarily  for  the   acquisition  and  development  of  producing
properties. Financing provided $33.3 million during 1997.

      Operating  activities for the year ended December 31, 1996, provided $13.5
million of cash.  Investing activities required $172.6 million primarily for the
acquisition of the Wyoming  Properties,  CGGS and Portilla and Happy.  Financing
provided $163.0 million during 1996.

      During 1995, operating activities provided $4.5 million of cash. Investing
activities  during  1995  utilized  $10.1  million  of  cash  primarily  for the
development  of  existing   properties.   Total  cash  provided  from  financing
activities for 1995 was $8 million as the result of the sale of 1,330,000 shares
of Common Stock and contingent  value rights during November 1995 which resulted
in net proceeds of $10.1 million.

      The Company is heavily dependent on crude oil and natural gas prices which
have  historically  been volatile.  Although the Company has hedged a portion of
its natural gas production  and intends to continue this practice,  future crude
oil and natural gas price declines  would have a material  adverse effect on the
Company's overall results, and therefore, its liquidity.  Furthermore, low crude
oil and natural gas prices could affect the  Company's  ability to raise capital
on terms favorable to the Company.

      Hedging  Activities.  In August 1995, the Company entered into a rate swap
agreement with a previous lender  relating to $25.0 million of principal  amount
of outstanding indebtedness. This agreement was assumed by the Banks . Under the
agreement,  the  Company  pays a fixed rate of 6.15%  while the Banks will pay a
floating rate equal to the USD-LIBOR-BBA  rate for one month maturities,  quoted
on the  eighteenth  day of  each  month,  to the  Company.  Settlements  are due
monthly. The agreement terminates in August 1998. At December 31, 1997, the fair
value of this swap, as determined by BTCo., was approximately $64,000.

      In connection  with the  re-acquisition  of the Portilla and Happy Fields,
the Company assumed a commodity price hedge on variable volumes of crude oil and
natural gas. Monthly  settlements with amounts either due to or from Christiania
are based on the differential between a fixed and a variable price for crude oil
and natural gas. During 1997, the approximate  monthly volume of crude oil sales
subject to this  agreement  is 15,800  barrels at a fixed price of $17.20.  This
agreement  reduces to  approximately  13,200  barrels per month in 1998,  11,000
barrels per month in 1999, 9,100 barrels per month in 2000 and 8,200 barrels per
month in 2001 until  November 1. The fixed  price paid to the Company  over this
five year period averages  $17.55 per barrel.  The natural gas component of this
agreement  calls for  approximately  54,000  MMBTU per month at a fixed price of
$1.80  during 1997 with  volumes  decreasing  to 37,000 MMBTU per month in 1998,
24,000 MMBTU per month in 1999,  19,000 MMBTU per month in 2000 and 15,000 MMBTU
per month in 2001 through October. The fixed price paid to the Company over this


                                       36
<PAGE>

five year period  averages $1.84 per MMBTU.  At December 31, 1997, the estimated
fair market value of the Hedge Agreement is a loss of approximately $700,000.

      Net Operating Loss  Carryforwards.  At December 31, 1997, the Company had,
subject to the limitations  discussed below, $25.1 million of net operating loss
carryforwards for U.S. tax purposes,  of which  approximately  $22.4 million are
available for utilization  without  limitation.  These loss  carryforwards  will
expire from 2002 through 2010 if not utilized. At December 31, 1997, the Company
had approximately  $2.9 million of net operating loss carryforwards for Canadian
tax purposes  which expire in 2003 and 2004. As a result of the  acquisition  of
certain  partnership  interests and crude oil and natural gas properties in 1990
and 1991,  an ownership  change under  Section 382,  occurred in December  1991.
Accordingly,  it is expected  that the use of net operating  loss  carryforwards
generated  prior  to  December  31,  1991 of $4.9  million  will be  limited  to
approximately  $235,  000 per year.  As a result of the  issuance of  additional
shares  of Common  Stock for  acquisitions  and  sales of stock,  an  additional
ownership change under Section 382 occurred in October 1993. Accordingly,  it is
expected that the use of all U.S. net  operating  loss  carryforwards  generated
through October 1993 or $8.2 million will be limited to approximately $1 million
per year subject to the lower  limitations  described above. Of the $8.2 million
net  operating  loss  carryforwards,  it is  anticipated  that the  maximum  net
operating  loss that may be utilized  before it expires is $5.7 million.  Future
changes in ownership may further  limit the use of the Company's  carryforwards.
In addition to the Section 382 limitations, uncertainties exist as to the future
utilization  of the operating  loss  carryforwards  under the criteria set forth
under FASB Statement No. 109. Therefore, the Company has established a valuation
allowance  of $5.7  million and $5.9 million for deferred tax assets at December
31, 1996 and 1997, respectively.


                      DESCRIPTION OF EXISTING INDEBTEDNESS

Series B Notes and Series C Notes

        On November  14,  1996,  Abraxas and Canadian  Abraxas  consummated  the
offering of $215 million of their 11 1/2 % Senior Notes due 2004,  Series A (the
"Series A Notes"), which were subsequently exchanged for the registered Series B
Notes. On January 27, 1998, the Issuers completed the sale of $60 million of the
Series C Notes.  The Series C Notes were sold at a premium of  $4,050,000  which
will be amortized over the life of the Series C Notes  resulting in an effective
interest  rate of 10.5%.  The terms of the Series C Notes are,  and the terms of
the Exchange Notes will be,  substantially  similar to the terms of the Series B
Notes.  The Series A Notes and the Series B Notes were  issued  pursuant  to the
Series A/B Indenture.  The Series A/B Indenture is substantially  similar to the
Indenture. See "Description of the Exchange Notes."

Credit Facility

        Concurrently  with the  consummation  of the  offering  of the  Series A
Notes, the Company entered into the Credit Facility with BTCo and other lenders.
The Credit Facility provides for a revolving line of credit with an availability
of $40 million,  subject to certain customary  conditions  including a borrowing
base  condition.  At March 31, 1998,  there was $100,000  outstanding  under the
Credit Facility.

        Commitments available under the Credit Facility are subject to borrowing
base  redeterminations to be performed  semi-annually and, at the option of each
of the Company and the lenders thereunder (the "Banks"), one additional time per
year. Any outstanding  principal balance in excess of the borrowing base will be
due  and  payable  in  three  equal  monthly  payments  after a  borrowing  base
redetermination.   The  borrowing   base  will  be  determined  in  BTCo's  sole
discretion,  subject to the  approval  of the  Banks,  based on the value of the
Company's  reserves  as  set  forth  in the  reserve  report  of  the  Company's
independent petroleum engineers, with consideration given to the Company's other
assets and liabilities.

        The Credit  Facility  has an initial  revolving  term of two years and a
reducing period of three years from the end of the initial two-year period.  The


                                       37
<PAGE>

commitment under the Credit Facility will be reduced during such reducing period
by eleven equal quarterly  reductions.  Quarterly reductions will equal 8.2% per
quarter with the remainder due at the end of the three-year reducing period.

        The applicable  interest rate charged on the outstanding  balance of the
Credit  Facility is based on a facility usage grid. If the borrowings  under the
Credit Facility represent an amount less than or equal to 33.3% of the available
borrowing  base,  then the applicable  interest rate charged on the  outstanding
balance  will be either (a) an adjusted  rate of the Londer  Inter-Bank  Offered
Rate  ("LIBOR")  plus  1.25% or (b) the  prime  rate of BTCo  (which is based on
BTCo's  published  prime rate) plus 0.50%.  If the  borrowings  under the Credit
Facility  represent an amount greater than or equal to 33.3% but less than 66.7%
of the  available  borrowing  base,  then the  applicable  interest  rate on the
outstanding  principal will be either (a) LIBOR plus 1.75% or (b) the prime rate
of BTCo plus 0.50%.  If the borrowings  under the Credit  Facility  represent an
amount greater than or equal to 66.7% of the available  borrowing base, then the
applicable  interest rate on the outstanding  principal will be either (a) LIBOR
plus 2.00% or (b) the prime rate of BTCo plus 0.50%. LIBOR elections can be made
for periods of one, three or six months.

        The Credit  Facility  contains a number of covenants  that,  among other
things, restrict the ability of the Company to (i) incur certain indebtedness or
guarantee obligations, (ii) prepay other indebtedness including the Notes, (iii)
make investments, loans or advances, (iv) create certain liens, (v) make certain
payments, dividends and distributions, (vi) merge with or sell assets to another
person or  liquidate,  (vii)  sell or  discount  receivables,  (viii)  engage in
certain intercompany transactions and transactions with affiliates,  (ix) change
its business, (x) experience a change of control and (xi) make amendments to its
charter,  by-laws  and other debt  instruments.  In  addition,  under the Credit
Facility,  the Company is required to comply with specified financial ratios and
tests,  including  minimum debt service coverage ratios,  maximum funded debt to
EBITDA tests,  minimum net worth tests and minimum  working capital tests. As of
December 31, 1997,  the Company was not in compliance  with the minimum  working
capital and capital  expenditure  requirements  under the Credit  Facility.  The
Company received a waiver of these requirements through March 31, 1998. At March
31, 1998, the Company was in compliance  with these  requirements.  Should crude
oil prices  continue to decline,  a further  write-down of the Company's oil and
gas properties may be required. If such a write-down were large enough, it could
result in a default  in the net worth and other  requirements  under the  Credit
Facility.

        The Credit  Facility  contains  customary  events of default,  including
nonpayment of principal, interest or fees, violation of covenants, inaccuracy of
representations  or warranties in any material respect,  cross default and cross
acceleration to certain other indebtedness,  bankruptcy,  material judgments and
liabilities  and change of control.  The Series A/B  Indenture and the Indenture
also contain a number of  covenants  and events of default  including  covenants
restricting,  among other  things,  the  Company's  ability to incur  additional
indebtedness,  incur  liens,  pay  dividends or make  certain  other  restricted
payments,  consummate certain asset sales, enter into certain  transactions with
affiliates,  merge  or  consolidate  with any  other  person  or  sell,  assign,
transfer,  lease, convey or otherwise dispose of all or substantially all of the
assets of the Company and events of default including nonpayment of principal or
interest on the Series B Notes and the Series C Notes,  violation of  covenants,
cross default on other indebtedness, bankruptcy and material judgments.

                                       38
<PAGE>


                                    BUSINESS

General

               The Company is an independent energy company engaged primarily in
the  acquisition,  exploration,  development  and  production  of crude  oil and
natural gas. Since January 1, 1991, the Company's  principal means of growth has
been through the  acquisition  and subsequent  development  and  exploitation of
producing  properties  and related  assets.  The Company  utilizes a disciplined
acquisition  strategy,  focusing its efforts on producing properties and related
assets possessing the following characteristics:  a concentration of operations;
significant,  quantifiable  development  potential;  historically  low operating
expenses; and the potential to reduce G&A expenses per BOE. The Company seeks to
complement   its   acquisition   and   development   activities  by  selectively
participating in exploration  projects with experienced  industry partners.  The
Company's   principal   areas  of  operation  are  Texas,   western  Canada  and
southwestern Wyoming. The Company owns interests in 706,605 gross acres (445,955
net acres) and 763.0 gross wells (404.7 net wells), 341 of which are operated by
the  Company,  and  varying  interests  in 20 natural gas  processing  plants or
compression facilities.

        Since December 31, 1990, the Company has made 17  acquisitions  of crude
oil and natural gas properties  totaling an estimated  52,100 MBOE at an average
acquisition  cost of $4.11 per BOE.  From  January 1, 1991 to December 31, 1997,
the Company's  estimated total proved reserves increased from 889 MBOE to 54,700
MBOE;  aggregate  PV-10  increased  from $11.0  million to $268.7  million;  and
average net daily production  increased from 0.141 MBOE per day to 14.9 MBOE per
day.

        The Company was founded in 1977 by Robert  L.G.  Watson,  the  Company's
Chairman of the Board,  President and Chief Executive Officer.  Canadian Abraxas
was formed by the  Company  in 1996 to acquire  CGGS.  The  Company's  principal
offices are located at 500 North Loop 1604 East,  Suite 100, San Antonio,  Texas
78232 and its telephone number is (210) 490-4788.  Canadian  Abraxas'  principal
offices are located at 300 - 5th Avenue,  12th Floor,  Calgary,  Alberta and its
telephone number is (403) 262-1949.

Primary Operating Areas

Texas

        Abraxas Cherry Canyon Field, Ward County,  Texas. In connection with the
acquisition of certain producing  properties  located in West Texas in July 1994
(the "West Texas Properties"), the Company acquired an interest in approximately
7,360 gross acres (4,500 net acres) in this field and  currently  operates 20 of
the wells in its acreage. The Company drilled its first shallow pool exploratory
test well in this field in March  1995.  Since that time,  this field has become
the principal  focus of the Company's  development  activity.  To date, 40 wells
have been drilled and completed in one or more sands, including the Bell Canyon,
Cherry  Canyon and Brushy Canyon  Sands.  Four other sands have been  production
tested with additional  sands remaining  behind pipe to be tested in the future.
The Company is currently attempting to delineate this field by drilling wells in
several  different  areas. The Company has not yet drilled any dry holes in this
field.  For the year ended December 31, 1997,  this field produced an average of
approximately  1,166 net Bbls of crude oil and NGLs and approximately  4,499 net
Mcf of natural gas per day from 27.25 net wells.

        Delaware Area (Howe,  ROC,  Block 16,  Taurus,  Gomez and Nine Mile Draw
Fields),  Ward,  Reeves,  and Pecos  Counties,  Texas.  In  connection  with the
acquisition  of the West Texas  Properties  in July 1994,  the Company  acquired
working interests ranging from 18% to 100% in 35 wells, 29 of which are operated
by the Company.  These fields produce from Devonian,  Wolfcamp,  Ellenburger and
Cherry Canyon  formations at depths  ranging from 6,500 feet to 17,600 feet. For
the  year  ended  December  31,  1997,  these  fields  produced  an  average  of
approximately  154 net Bbls of crude oil and NGLs and  4,158 net Mcf of  natural
gas per day from 15.7 net wells.

        Portilla  Field,  San Patricio  County,  Texas.  The Company  originally
acquired a 50% working  interest in the  Portilla  Field  ("Portilla")  in April
1993. In March 1996, the Company sold its interest in Portilla to a third party,
which subsequently  contributed it to a limited partnership of which the Company
owned  a 25%  interest  (the  "Partnership").  In  November  1996,  the  Company


                                       39
<PAGE>

reacquired Portilla, including a 50% interest previously owned by a pension fund
(the "Pension  Fund").  This field was  discovered in the 1950's by Superior Oil
Company and produces  from  numerous  Miocene,  Frio and  Vicksburg age sands at
depths  ranging from 4,000 feet to 9,000 feet.  For the year ended  December 31,
1997, the field produced an average of  approximately  586 net Bbls of crude oil
and NGLs and  approximately  1,213  net Mcf of  natural  gas per day from 51 net
wells.  The  Company  owns a 100%  interest in a natural  gas  processing  plant
located at Portilla  (the  "Portilla  Plant")  which had  aggregate  capacity of
approximately  20.0 MMcf of natural gas per day at December 31, 1997. During the
year ended  December  31,  1997,  the  Portilla  Plant  processed  an average of
approximately  13.5 MMcf of  natural  gas per day and  extracted  an  average of
approximately 200 Bbls of NGLs per day. The Company is currently the operator of
the Portilla Plant and all of the wells in the Portilla Field.

        East  White  Point  Field,  San  Patricio  County,  Texas.  The  Company
originally  acquired an approximate 30% working  interest in this field in April
1993.  In March  1996,  the  Company  sold  its  interest  in this  field to the
Partnership.  In November 1996, the Company reacquire its interest in this field
and obtained the release of the Pension Fund's 50% overriding  royalty  interest
in this field.  The field produces crude oil and natural gas from numerous sands
in the Lower Frio  formation  at depths  ranging from 9,000 feet to 13,000 feet.
For the year  ended  December  31,  1997,  this  field  produced  an  average of
approximately  331 net Bbls of crude oil and NGLs and  2,933 net Mcf of  natural
gas per day from  8.2 net  wells.  The  Company  also  owns an  approximate  38%
interest in and operates a natural gas processing  plant in this field. The East
White Point natural gas processing plant, a modern cryogenic plant with capacity
of  approximately  25 MMcf of  natural  gas per day,  processed  an  average  of
approximately  8.2 MMcf of natural gas per day and extracted  approximately  477
Bbls of NGLs per day for the year ended December 31, 1997.

        Stedman  Island Field,  Nueces  County,  Texas.  The Company  originally
acquired a 25% working  interest  in this field in April 1993 and an  additional
25% in October 1995. In November 1996,  the Company  obtained the release of the
Pension  Fund's  50%  overriding  royalty  interest  in this  field.  This field
produces  crude oil and natural gas from Frio sands at depths ranging from 8,500
feet to 10,000 feet. For the year ended  December 31, 1997,  this field produced
an average of approximately 203 net Bbls of crude oil and NGLs and 3,072 net Mcf
of natural gas per day from 5 net wells.

        Spraberry Trend Field, Midland, Martin and Reagan Counties, Texas. Since
January 1, 1991,  the Company has  acquired  interests  in or drilled  eight new
wells in this field.  This field  produces at depths  ranging from 8,000 feet to
9,100 feet in multiple  sands.  The Company  owns  interests in 30 wells in this
field,  15 of which  are  operated  by the  Company.  Following  the  successful
completion  of two wells  during the second  quarter of 1996,  eight  additional
proved  undeveloped  locations  were  identified  by the  Company's  independent
petroleum engineers. For the year ended December 31, 1997, the field produced an
average of  approximately  117 net Bbls of crude oil and NGLs and  approximately
275 net Mcf natural gas per day from 31 net wells.

Southwestern Wyoming

        The Company  acquired  the Wyoming  Properties  in September  1996.  The
Wyoming  Properties  produce  natural gas from numerous  sands at depths ranging
from 8,500  feet to 12,000  feet.  For the year ended  December  31,  1997,  the
Wyoming Properties  produced an average of approximately 1,740 net Bbls of crude
oil and NGLs and 15,810 net Mcf of natural gas per day from 42 net wells.

Western Canada

        In  January  1996,  the  Company  invested  $3.0  million  in Grey  Wolf
Exploration Ltd. ("Grey Wolf"), a privately held Canadian corporation, which, in
turn,   invested  these  proceeds  in   newly-issued   shares  of  Cascade,   an
Alberta-based  corporation  whose common  shares are traded on The Alberta Stock
Exchange  under the  symbol  "COL." In  November  1997,  Grey Wolf  merged  with
Cascade.  The Company owns approximately 46% of the outstanding capital stock of
Cascade.  Cascade  owns a 10% interest in the Canadian  Abraxas  Properties  (as
defined  herein)  and the  Canadian  Abraxas  Plants and an 8%  interest  in the
Pacalta  Properties  (as defined  herein) and manages the operations of Canadian
Abraxas pursuant to a management agreement between Canadian Abraxas and Cascade.
Under  the  management  agreement,   Canadian  Abraxas  reimburses  Cascade  for
reasonable   costs  or  expenses   attributable  to  Canadian  Abraxas  and  for
administrative  expenses based upon the percentage that Canadian  Abraxas' gross
revenue bear to the total gross revenue of Canadian Abraxas and Cascade.

                                       40
<PAGE>

        In November  1996,  Canadian  Abraxas  acquired  Canadian Gas  Gathering
Systems,  Inc.  ("CGGS").  For the year ended  December 31, 1997,  the producing
properties  acquired  by  Canadian  Abraxas  from  CGGS (the  "Canadian  Abraxas
Properties")  produced an average of approximately 530 net Bbls of crude oil and
NGLs and 23,403 net Mcf of natural gas per day from 110 net wells.

        In October 1997,  Canadian Abraxas and Cascade completed the acquisition
of the Canadian assets of Pacalta Resources Ltd. (the "Pacalta  Properties") for
Cdn $20.0 million in cash and four million  Cascade Special  Warrants.  Canadian
Abraxas  acquired a 92% interest in the Pacalta  Properties and Cascade acquired
an 8%  interest.  Cascade  has the  opportunity  to  acquire  Canadian  Abraxas'
ownership upon arranging satisfactory financing in 1998. At closing, the Pacalta
Properties  were  producing 115 net Bbls of oil per day and 8,000 net Mcf of gas
per day.

        The  following  table sets forth a summary  of certain  information,  by
field, of the Canadian Abraxas, Pacalta, Pennant and Cascade Properties:

                                           Average Daily Production
                                            for Year Ended December
                                                   31, 1997
                                           --------------------------
                                            Crude Oil
                                             & NGLs     Natural Gas
Name of Field    Working      Net Wells      (Bbls)        (Mcf)
                 Interest
Quirk Creek         (1)            4.4          213        4,420
Sundre              (2)           10.2          214        4,551
Bellis              (3)           26.4           --        4,510
Chinchaga           (4)            3.4           10        2,129
Pouce Coupe         (5)            2.0           --        2,161
Valhalla            (6)            6.5            3        1,007
Other (8)(9)        (7)           56.8          283        9,072
                                  ----          ---        -----
Total                            109.7          725       27,850
- ------------

(1) Canadian Abraxas owns working interest ranging from 21% to 48% in 13 wells.
(2) Canadian Abraxas owns working interests ranging from 1% to 70% in 26 wells.
(3) Canadian Abraxas owns working interest from 7.5% to 100% in 40 wells.
(4) Canadian Abraxas owns working interests ranging from 70% to 100% in 4 wells.
(5) Canadian Abraxas owns interest of 100% in 2 wells.
(6) Canadian Abraxas owns working interest ranging from 50% to 100% in 8 wells.
(7) Canadian Abraxas owns working interest ranging from 1% to 100% in 213 wells.
(8) Consist of Big Bend, Kbnopcik, Eaglesham, Giroux Lake and minor properties.
(9)Includes  acquisition  of Pennant  properties  effective  September  1, 1997,
   (working  interests  ranging  from  1% to  100%  in  41  wells)  and  Pacalta
   properties  effective June 1, 1997 (working interests ranging from 1% to 100%
   in 78 wells).

        Natural Gas  Processing.  In connection  with the  acquisition  of CGGS,
Canadian  Abraxas  acquired  interests in 11 natural gas processing  plants (the
"Canadian  Abraxas  Plants") and 197 miles of natural gas gathering  facilities.
Natural gas gathering  operations  involve  locating and contracting for natural
gas supplies  produced  from crude oil and natural gas fields and the  operation
and maintenance of a gathering system of pipelines that connect such natural gas
supply sources to natural gas processing plants. Natural gas processing involves
subjecting  natural gas to high  pressure and low  temperature  treatments  that
cause the natural gas to separate into various products,  including a mixture of
NGLs (commonly referred to as raw product), residual natural gas and by-products
such as helium,  condensate  and  sulfur.  The  combined  value of the  residual
natural  gas,  raw  product and  by-products  is  generally  higher than that of


                                       41
<PAGE>

unprocessed  natural gas.  Certain of Canadian  Abraxas'  processing  plants are
equipped to fractionate  the raw product into its component  products of ethane,
propane, butanes and natural gasoline for sale to local markets.

        The following table sets forth certain  information  with respect to the
Canadian Abraxas Plants for the year ended December 31, 1997.

                                             Gross            Net
                                            Plant           Plant
                              Working      Capacity        Capacity
Plant Location                Interest     (MMcfpd)         (MMcfpd)
- --------------                --------     --------         --------
Quirk Creek                      26%           80             20.8
Knopcik (1)                      10%           56              5.6
Valhalla                        100%           30             30.0
Sundre                           40%           20              8.0
Bellis (2)                       49%           44             21.7
Big Bend                         77%            8              6.2
Pouce Coupe                     100%            8              8.0
Eaglesham                        25%            5              1.3
                                               --            -----
    Total                                      251           101.6
                                               ===           =====
- ------------
(1) Consists of three plants.
(2) Consists of eight plants.

Developmental and Exploratory Acreage

        The following  table  indicates the Company's  interest in developed and
undeveloped acreage as of December 31, 1997:

                                 Developed and Undeveloped Acreage
                                      As of December 31, 1997

                           Developed Acreage           Undeveloped Acreage
                     ---------------------------- -----------------------------
                      Gross Acres     Net Acres    Gross Acres      Net Acres
                     -------------  ------------  -------------  --------------
 Canada                  227,794        111,888       402,246        286,041
 Texas                    41,393         24,143        12,369          9,591
 N. Dakota                 1,864          1,021            --             --
 Montana                     320             10            --             --
 Kansas                      640            142            --             --
 Wyoming                   5,239          3,620        14,020          9,476
 Alabama                     720             23            --             --
                     -------------  ------------  -------------  --------------
         Total           277,970        140,847       428,635        305,108
- ---------------


Productive Wells

        The following table sets forth the total gross and net productive  wells
of the  Company,  expressed  separately  for crude oil and  natural  gas,  as of
December 31, 1997:

                                       42
<PAGE>

                                             Productive Wells
                                         As of December 31, 1997

                                 Crude Oil                   Natural Gas
                        --------------------------  ----------------------------
    State/Country          Gross          Net          Gross            Net
   ------------------   ------------  ------------  ------------   -------------
   Canada                    57.0          12.7          212.0          97.2
   Texas                    332.0         194.8          105.0          67.2
   N. Dakota                  4.0           1.7            --            --
   Montana                    1.0           0.1            --            --
   New Mexico                 --            --             1.0           0.1
   Wyoming                    3.0           0.2           43.0          30.0
   Alabama                    1.0           --             1.0           --
   Kansas                     3.0           0.7            --            --
                        ============  ============  ============   =============
           Total            401.0         210.2          362.0         194.5
                        ============  ============  ============   =============

        Substantially  all of the Company's  existing  crude oil and natural gas
properties  are pledged to secure the  Company's  indebtedness  under the Credit
Facility. See "Description of Existing Indebtedness."

Reserves Information

        The crude oil and natural gas reserves of Abraxas have been estimated as
of January 1, 1998,  January 1, 1997 and January 1, 1996 and of Canadian Abraxas
as of January 1, 1997, by DeGolyer & MacNaughton, of Dallas, Texas. The reserves
of Canadian  Abraxas and  Cascade as of January 1, 1998 have been  estimated  by
McDaniel &  Associates  Consultants  Ltd.  of  Calgary,  Alberta.  Crude oil and
natural gas  reserves,  and the  estimates  of the  present  value of future net
revenues  therefrom,  were  determined  based on then current  prices and costs.
Reserve  calculations involve the estimate of future net recoverable reserves of
crude oil and natural gas and the timing and amount of future net revenues to be
received therefrom.  Such estimates are not precise and are based on assumptions
regarding a variety of factors, many of which are variable and uncertain.

        The following table sets forth certain  information  regarding estimates
of the Company's  crude oil,  natural gas liquids and natural gas reserves as of
January 1, 1998 January 1, 1997 and January 1, 1996:

                                        Estimated Proved Reserves
                                ----------------------------------------

                                  Proved        Proved          Total
                                 Developed    Undeveloped      Proved
                                -----------   ------------    ----------

      As of January 1, 1996
        Crude oil (MBbls)           3,992          1,516           5,508
        NGLs (MBbls)                2,007            752           2,759
        Natural gas (MMcf)         44,026         10,543          54,569

      As of January 1, 1997
        Crude oil (MBbls)           7,871          1,930           9,801 (1)
        NGLs (MBbls)                7,090          1,144           8,234
        Natural gas (MMcf)        157,660         19,600         177,260

      As of January 1,1998
        Crude oil (MBbls)           7,075          1,873           8,948 (1)
        NGLs (MBbls)                7,178          1,651           8,829 (2)
        Natural gas (MMcf)        186,490         34,824         221,314 (3)


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

                                       43
<PAGE>

    (1)  Includes  120,000 and 128,900  barrels of crude oil  reserves  owned by
Cascade of which  57,600 and  69,541  barrels  are  applicable  to the  minority
interests   share  of  these   reserves  as  of  December  31,  1996  and  1997,
respectively.
    (2)  Includes  131,300  barrels of natural  gas  liquids  reserves  owned by
Cascade of which 70,889 barrels are applicable to the minority  interests  share
of these reserves as of December 31, 1997.
    (3) Includes  7,446 Mmcf of natural gas  reserves  owned by Cascade of which
4,020 Mmcf are applicable to the minority  interests  share of these reserves as
of December 31, 1997.


        There are numerous  uncertainties  inherent in estimating  quantities of
proved  reserves and in projecting  future rates of production and the timing of
development  expenditures,  including  many  factors  beyond the  control of the
Company.  The reserve data included in this Prospectus represent only estimates.
Reserve   engineering  is  a  subjective   process  of  estimating   underground
accumulations  of crude oil and  natural gas that cannot be measured in an exact
manner.  The  accuracy of any  reserve  estimate is a function of the quality of
available data and of engineering and geological interpretation and judgment. As
a result,  estimates  of  different  engineers  often  vary . In  addition,  the
estimates  of future net  revenue  from  proved  reserves of the Company and the
present value thereof are based upon certain assumptions about future production
levels,  prices,  and  costs  that may not prove to be  correct  over  time.  In
particular,  estimates of natural gas  reserves,  future net revenue from proved
reserves  and the PV-10  thereof  for the  Company's  crude oil and  natural gas
properties  included in this  Prospectus are subject to revisions by the results
of drilling,  testing and production  subsequent to the date of such  estimates.
Accordingly,  reserve estimates are often different from the quantities of crude
oil and natural gas that are ultimately  recovered.  The  meaningfulness of such
estimates is highly  dependent upon the accuracy of the  assumptions  upon which
they are based.

        In  general,  the volume of  production  from crude oil and  natural gas
properties  declines as reserves are depleted.  Except to the extent the Company
acquires   properties   containing   proved  reserves  or  conducts   successful
exploration  and  development  activities,  or both, the proved  reserves of the
Company will decline as reserves are produced.  The  Company's  future crude oil
and natural gas  production  is  therefore  highly  dependent  upon its level of
success in acquiring or finding additional reserves.

        The Company  files  reports of its  estimated  crude oil and natural gas
reserves  with the  Department  of  Energy  and the  Bureau of the  Census.  The
reserves  reported  to these  agencies  are  required  to be reported on a gross
operated  basis and  therefore  are not  comparable to the reserve data reported
herein.

Crude Oil, NGLs and Natural Gas Production and Sales Prices

        The following table presents the net crude oil, net NGLs and net natural
gas production for the Company, the average sales price per Bbl of crude oil and
NGLs  and  per Mcf of  natural  gas  produced  and  the  average  LOE per BOE of
production sold, for each of the three years ended December 31, 1997:


                                       44
<PAGE>

                                            1995           1996            1997
                                        ----           ----            ----

     Crude oil production (Bbls)         401,445         425,188        936,716
     Natural gas production (Mcf)      3,552,671       6,350,069     21,050,045
     Natural gas liquids
       production (Bbls)                 143,380         299,509        992,266
     Average  sales  price per
       Bbl of crude oil ($)              $ 17.16         $ 20.85        $ 18.63
     Average sales price per
       MCF of natural gas ($)            $  1.47         $  1.97        $  1.79
     Average sales  price per
       Bbl of natural gas      
        liquids ($)                      $ 10.83         $ 14.55        $ 10.75
     Average cost of
        production ($) per      
         BOE produced (1)                $  3.81         $  3.28        $  2.74

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


(1) Oil and gas were  combined  by  converting  gas to a barrel  oil  equivalent
("BOE") on the basis of 6 Mcf gas =1 Bbl of oil. Production costs include direct
operating costs, ad valorem taxes and gross production taxes.


                                       45
<PAGE>


Drilling Activities

        The  following  table sets  forth the  Company's  gross and net  working
interests in exploratory, development, and service wells drilled during the year
ended December 31, 1997:

                             1995                1996                1997
                       -----------------   -----------------   ----------------
                        Gross      Net     Gross       Net      Gross     Net
                       -------   -------   -------   -------   -------  -------
Exploratory

 Productive
  
    Crude oil            1.0       .72       2.0       1.2         -       -

    Natural gas            -         -       2.0       1.2      10.0     7.9

 Dry holes               1.0         1       4.0       1.4       2.0     1.8
                      -------   -------   -------   -------   -------  -------
 Total                   2.0      1.72       8.0       3.8      12.0     9.7
                      =======   =======   =======   =======   =======  =======


Development

  Productive

     Crude oil           12.0       9.1      20.0      15.8      25.0    22.3

     Natural gas          2.0        .6      10.0       3.7      20.0    14.9

  Service                   -         -       1.0       1.0         -       -

  Dry holes               1.0        .3         -         -       3.0     2.0
                      -------   -------   -------   -------   -------  -------
  Total                  15.0      10.0      31.0      20.5      48.0    39.2
                      =======   =======   =======   =======   =======  =======



        As of March 31,  1998,  the  Company  had five  wells in the  process of
drilling.



Markets and Customers

        The revenues generated by the Company's  operations are highly dependent
upon the prices of, and demand for crude oil and natural gas. Historically,  the
markets  for crude oil and  natural  gas have been  volatile  and are  likely to
continue to be volatile  in the future.  The prices  received by the Company for
its crude oil and natural gas  production  and the level of such  production are
subject to wide fluctuations and depend on numerous factors beyond the Company's
control  including  seasonality,  the  condition  of the  United  States and the
Canadian  economies  (particularly the manufacturing  sector),  foreign imports,
political conditions in other oil-producing and natural gas-producing countries,
the actions of the  Organization of Petroleum  Exporting  Countries and domestic
regulation,  legislation and policies.  Decreases in the prices of crude oil and
natural  gas have had,  and could have in the future,  an adverse  effect on the
carrying  value of the Company's  proved  reserves and the  Company's  revenues,
profitability and cash flow.

        In order to manage its  exposure to price risks in the  marketing of its
crude oil and natural  gas, the Company from time to time has entered into fixed


                                       46
<PAGE>

price delivery contracts,  financial swaps and crude oil and natural gas futures
contracts as hedging devices. To ensure a fixed price for future production, the
Company may sell a futures  contract  and  thereafter  either (i) make  physical
delivery of crude oil or natural gas to comply with such  contract or (ii) buy a
matching futures contract to unwind its futures position and sell its production
to a customer.  Such  contracts  may expose the Company to the risk of financial
loss in certain circumstances, including instances where production is less than
expected,  the Company's  customers  fail to purchase or deliver the  contracted
quantities of crude oil or natural gas, or a sudden, unexpected event materially
impacts  crude oil or natural gas prices.  Such  contracts may also restrict the
ability of the Company to benefit  from  unexpected  increases  in crude oil and
natural gas prices.  See  "Management's  Discussion  and  Analysis of  Financial
Condition and Results of Operations - Liquidity and Capital Resources.

        Substantially  all of the Company's crude oil and natural gas is sold at
current  market  prices  under  short term  contracts,  as is  customary  in the
industry.  During the year ended December 31, 1997, three  purchasers  accounted
for  approximately  42% of the Company's crude oil and natural gas sales and two
customers  accounted for approximately  51% of natural gas processing  revenues.
The Company  believes  that there are  numerous  other  companies  available  to
purchase the Company's crude oil and natural gas and that the loss of any or all
of these  purchasers would not materially  affect the Company's  ability to sell
crude oil and natural gas.

Competition

        The Company  encounters strong  competition from major oil companies and
independent  operators in acquiring  properties  and leases for the  exploration
for, and production of, crude oil and natural gas.  Competition is  particularly
intense with respect to the acquisition of desirable  undeveloped  crude oil and
natural gas leases. The principal competitive factors in the acquisition of such
undeveloped  crude  oil and  natural  gas  leases  include  the  staff  and data
necessary to identify,  investigate and purchase such leases,  and the financial
resources  necessary to acquire and develop such leases.  Many of the  Company's
competitors have financial resources, staff and facilities substantially greater
than those of the Company. In addition, the producing,  processing and marketing
of crude oil and natural gas is affected by a number of factors which are beyond
the control of the Company, the effect of which cannot be accurately predicted.

        The principal  resources necessary for the exploration and production of
crude oil and  natural  gas are  leasehold  prospects  under which crude oil and
natural gas reserves may be discovered,  drilling rigs and related  equipment to
explore for such reserves and  knowledgeable  personnel to conduct all phases of
crude  oil and  natural  gas  operations.  The  Company  must  compete  for such
resources  with  both  major  crude oil  companies  and  independent  operators.
Although the Company believes its current operating and financial  resources are
adequate  to  preclude  any  significant  disruption  of its  operations  in the
immediate future, the continued  availability of such materials and resources to
the Company cannot be assured.

        The Company will face significant  competition for obtaining  additional
natural gas supplies for  gathering  and  processing  operations,  for marketing
NGLs, residue gas, helium,  condensate and sulfur, and for transporting  natural
gas  and  liquids.  The  Company's  principal  competitors  will  include  major
integrated oil companies and their  marketing  affiliates and national and local
gas gatherers,  brokers,  marketers and distributors of varying sizes, financial
resources  and  experience.  Certain  competitors,  such as major  crude oil and
natural gas companies,  have capital  resources and control  supplies of natural
gas substantially greater than the Company. Smaller local distributors may enjoy
a marketing  advantage in their immediate  service areas.  The Company  competes
against other companies in its natural gas processing business both for supplies
of natural gas and for customers to which it sells its products. Competition for
natural gas  supplies is based  primarily  on location of natural gas  gathering
facilities  and  natural  gas  gathering   plants,   operating   efficiency  and
reliability and ability to obtain a satisfactory  price for products  recovered.
Competition for customers is based primarily on price and delivery capabilities.

Regulatory Matters

        The  Company's  operations  are  affected  from time to time in  varying
degrees by political developments and federal,  state, provincial and local laws
and regulations.  In particular, oil and gas production operations and economics


                                       47
<PAGE>

are, or in the past have been, affected by price controls, taxes,  conservation,
safety,  environmental,  and other laws relating to the petroleum  industry,  by
changes in such laws and by constantly changing administrative regulations.

        Price  Regulations.  In the  recent  past,  maximum  selling  prices for
certain  categories of crude oil, natural gas,  condensate and NGLs were subject
to federal  regulation.  In 1981, all federal price controls over sales of crude
oil, condensate and NGLs were lifted. Effective January 1, 1993, the Natural Gas
Wellhead Decontrol Act (the "Decontrol Act") deregulated  natural gas prices for
all "first sales" of natural gas, which includes all sales by the Company of its
own production.  As a result, all sales of the Company's  domestically  produced
crude oil, natural gas, condensate and NGLs may be sold at market prices, unless
otherwise committed by contract.

        Natural  gas  exported  from  Canada is  subject  to  regulation  by the
National  Energy Board ("NEB") and the government of Canada.  Exporters are free
to  negotiate  prices and other  terms with  purchasers,  provided  that  export
contracts  in  excess  of two  years  must  continue  to meet  certain  criteria
prescribed by the NEB and the  government  of Canada.  As is the case with crude
oil, natural gas exports for a term of less than two years must be made pursuant
to an NEB order, or, in the case of exports for a longer  duration,  pursuant to
an NEB license and Governor in Council approval.

        The  government of Alberta also regulates the volume of natural gas that
may be removed from Alberta for  consumption  elsewhere based on such factors as
reserve availability, transportation arrangements and marketing considerations.

        The North American Free Trade  Agreement.  On January 1, 1994, the North
American Free Trade  Agreement  ("NAFTA")  among the  governments  of the United
States, Canada and Mexico became effective.  In the context of energy resources,
Canada remains free to determine  whether  exports to the U.S. or Mexico will be
allowed provided that any export  restrictions do not: (i) reduce the proportion
of energy resources exported relative to the total supply of the energy resource
(based upon the proportion  prevailing in the most recent 36 month period); (ii)
impose an export price higher than the domestic  price;  or (iii) disrupt normal
channels of supply.  All three  countries are prohibited  from imposing  minimum
export or import price requirements.

        NAFTA contemplates the reduction of Mexican  restrictive trade practices
in the energy sector and prohibits discriminatory border restrictions and export
taxes.  The agreement  also  contemplates  clearer  disciplines on regulators to
ensure fair  implementation of any regulatory changes and to minimize disruption
of  contractual  arrangements,  which is  important  for  Canadian  natural  gas
exports.

        Natural Gas  Regulation.  Historically,  interstate  pipeline  companies
generally acted as wholesale  merchants by purchasing natural gas from producers
and  reselling  the gas to local  distribution  companies  and large end  users.
Commencing in late 1985, the Federal Energy  Regulatory  Commission (the "FERC")
issued a series of orders that have had a major impact on interstate natural gas
pipeline operations,  services,  and rates, and thus have significantly  altered
the marketing and price of natural gas. The FERC's key rule making action, order
No. 636 ("Order 636"),  issued in April 1992,  required each interstate pipeline
to, among other things,  "unbundle" its  traditional  bundled sales services and
create  and make  available  on an open  and  nondiscriminatory  basis  numerous
constituent  services (such as gathering  services,  storage services,  firm and
interruptible  transportation  services,  and  standby  sales and gas  balancing
services),  and to adopt a new ratemaking  methodology to determine  appropriate
rates for those  services.  To the  extent  the  pipeline  company  or its sales
affiliate makes natural gas sales as a merchant,  it does so pursuant to private
contracts in direct  competition  with all of the sellers,  such as the Company;
however,  pipeline  companies and their  affiliates  were not required to remain
"merchants" of natural gas, and most of the interstate  pipeline  companies have
become  "transporters only." In subsequent orders, the FERC largely affirmed the
major features of Order 636 and denied a stay of the  implementation  of the new
rules pending  judicial  review.  By the end of 1994, the FERC had concluded the
Order 636  restructuring  proceedings,  and, in general,  accepted  rate filings
implementing Order 636 on every major interstate pipeline. The federal appellate
courts have largely  affirmed the features of Order No. 636 and numerous related
orders  pertaining to the individual  pipelines.  Nevertheless,  because further
review of certain of these  orders is still  possible,  various  appeals  remain
pending,   and  the  FERC  continues  to  review  and  modify  its  open  access
regulations,  the outcome of such  proceedings  and their ultimate impact on the
Company's business is uncertain.

                                       48
<PAGE>

        In recent  years the FERC also has  pursued a number of other  important
policy  initiatives  which could  significantly  affect the marketing of natural
gas.  Some of the more  notable of these  regulatory  initiatives  include (i) a
series of orders in individual  pipeline  proceedings  articulating  a policy of
generally  approving the voluntary  divestiture  of  interstate  pipeline  owned
gathering  facilities by interstate pipelines to their affiliates (the so-called
"spin down" of  previously  regulated  gathering  facilities  to the  pipeline's
nonregulated  affiliates),  (ii) the  completion  of  rule-making  involving the
regulation of pipelines with marketing affiliates under Order No. 497, (iii) the
FERC's ongoing efforts to promulgate  standards for pipeline electronic bulletin
boards and electronic data exchange,  (iv) a generic inquiry into the pricing of
interstate  pipeline  capacity,  (v)  efforts to refine  the FERC's  regulations
controlling  operation of the secondary market for released  pipeline  capacity,
(vi) a policy statement  regarding  market based rates and other  non-cost-based
rates for  interstate  pipeline  transmission  and storage  capacity and (vii) a
proposed rule to further standardize  pipeline  transportation  tariffs that, if
implemented  as proposed,  may  adversely  affect the  reliability  of scheduled
interruptible  transportation.  In  addition,  the FERC has  recently  requested
comments  on  the  financial  outlook  of  the  natural  gas  pipeline  industry
including,  among other matters, whether the FERC's current rate making policies
are suitable in the current industry  environment.  Several of these initiatives
are intended to enhance competition in natural gas markets,  although some, such
as "spin  downs," may have the adverse  effect of  increasing  the cost of doing
business  on some in the  industry  as a result of the  monopolization  of those
facilities by their new,  unregulated  owners. The FERC has attempted to address
some of these  concerns  in its orders  authorizing  such "spin  downs,"  but it
remains to be seen what effect these  activities  will have on access to markets
and the cost to do  business.  As to all of these recent FERC  initiatives,  the
ongoing, or, in some instances,  preliminary evolving nature of these regulatory
initiatives makes it impossible at this time to predict their ultimate impact on
the Company's business.

        Recent orders of the FERC have been more liberal in their  reliance upon
traditional  tests for determining what facilities are "gathering" and therefore
exempt  from  federal  regulatory  control.  In many  instances,  what  was once
classified as  "transmission"  may now be classified as "gathering." The Company
transports  certain of its  natural gas through  gathering  facilities  owned by
others,  including  interstate  pipelines,  under existing long term contractual
arrangements.  With respect to item (i) in the preceding  paragraph,  on May 27,
1994,  the FERC issued orders in the context of the "spin off" or "spin down" of
interstate pipeline owned gathering facilities.  A "spin off" is a FERC-approved
sale of such facilities to a non-affiliate. A "spin down" is the transfer by the
interstate  pipeline of its gathering  facilities  to an affiliate.  A number of
spin offs and spin downs have been  approved  by the FERC and  implemented.  The
FERC held that it retains  jurisdiction  over  gathering  provided by interstate
pipelines,  but  that it  generally  does not have  jurisdiction  over  pipeline
gathering affiliates, except in the event of affiliate abuse (such as actions by
the affiliate  undermining open and  nondiscriminatory  access to the interstate
pipeline).  These  orders  require  nondiscriminatory  access for all sources of
supply and prohibit the tying of pipeline  transportation service to any service
provided by the pipeline's gathering  affiliate.  On November 30, 1994, the FERC
issued a series of rehearing  orders largely  affirming the May 27, 1994 orders.
The FERC now  requires  interstate  pipelines to not only seek  authority  under
Section 7(b) of the Natural Gas Act of 1938 (the "NGA") to abandon  certificated
facilities,  but also to seek authority  under Section 4 of the NGA to terminate
service from both certificated and uncertificated  facilities. The U.S. Court of
Appeals for the D.C. Circuit has now largely upheld the FERC. The Company cannot
predict what the ultimate  effect of the FERC's  orders  pertaining to gathering
will have on its production and marketing.

        State  and  Other  Regulation.  All of the  jurisdictions  in which  the
Company  owns  producing  crude oil and natural gas  properties  have  statutory
provisions  regulating  the  exploration  for and  production  of crude  oil and
natural gas,  including  provisions  requiring permits for the drilling of wells
and  maintaining  bonding  requirements  in order to drill or operate  wells and
provisions  relating to the location of wells, the method of drilling and casing
wells,  the  surface  use and  restoration  of  properties  upon which wells are
drilled and the plugging and abandoning of wells.  The Company's  operations are
also subject to various  conservation  laws and  regulations.  These include the
regulation of the size of drilling and spacing units or proration  units and the
density of wells  which may be drilled and the  unitization  or pooling of crude
oil and natural gas  properties.  In this  regard,  some states allow the forced
pooling or  integration of tracts to facilitate  exploration  while other states
rely on voluntary pooling of lands and leases. In addition,  state  conservation


                                       49
<PAGE>

laws establish maximum rates of production from crude oil and natural gas wells,
generally  prohibit  the  venting or flaring of natural  gas and impose  certain
requirements regarding the ratability of production.  Some states, such as Texas
and Oklahoma,  have, in recent years, reviewed and substantially revised methods
previously used to make monthly  determinations of allowable rates of production
from fields and individual  wells.  The effect of these  regulations is to limit
the amounts of crude oil and natural gas the Company can produce from its wells,
and to limit the number of wells or the location at which the Company can drill.

        State  regulation of gathering  facilities  generally  includes  various
safety,  environmental,  and  in  some  circumstances,  non-discriminatory  take
requirements,  but  does not  generally  entail  rate  regulation.  Natural  gas
gathering has received greater regulatory scrutiny at both the state and federal
levels in the wake of the interstate pipeline restructuring under Order 636. For
example,   Oklahoma  recently  enacted  a  prohibition  against   discriminatory
gathering rates and certain Texas regulatory  officials have expressed  interest
in evaluating similar rules.

        In the event the Company  conducts  operations  on federal or Indian oil
and  gas  leases,   such  operations   must  comply  with  numerous   regulatory
restrictions, including various non-discrimination statutes, and certain of such
operations must be conducted  pursuant to certain on-site  security  regulations
and other permits issued by various federal agencies. In addition,  the Minerals
Management Service ("MMS") has recently issued a final rule to clarify the types
of costs  that are  deductible  transportation  costs for  purposes  of  royalty
valuation of production  sold off the lease.  In particular,  MMS will not allow
deduction of costs  associated  with marketer fees,  cash out and other pipeline
imbalance penalties, or long-term storage fees. The Company cannot predict what,
if any, effect the new rule will have on its operations.

                                       50
<PAGE>


Title to Properties

        As is customary in the crude oil and natural gas  industry,  the Company
makes only a cursory  review of title to  undeveloped  crude oil and natural gas
leases at the time they are acquired by the Company.  However,  before  drilling
commences, the Company requires a thorough title search to be conducted, and any
material  defects in title are remedied  prior to the time actual  drilling of a
well on the lease begins.  To the extent title opinions or other  investigations
reflect title defects,  the Company,  rather than the seller of the  undeveloped
property, is typically obligated to cure any title defect at its expense. If the
Company  were unable to remedy or cure any title defect of a nature such that it
would not be  prudent to  commence  drilling  operations  on the  property,  the
Company  could  suffer a loss of its  entire  investment  in the  property.  The
Company  believes  that it has  good  title to its  crude  oil and  natural  gas
properties, some of which are subject to immaterial encumbrances,  easements and
restrictions.  The crude oil and natural gas properties owned by the Company are
also typically  subject to royalty and other similar non-cost bearing  interests
customary  in the  industry.  The  Company  does not  believe  that any of these
encumbrances or burdens will materially affect the Company's ownership or use of
its properties. All of the Company's U.S. properties are subject to the liens of
the Banks.

Employees

        As of March 31, 1998, the Company had 74 full-time employees,  including
two executive officers,  six non-executive  officers,  five petroleum engineers,
two  landmen,  two  geologists,  thirty  secretarial,  accounting  and  clerical
personnel and 27 field personnel. Additionally, Abraxas retains contract pumpers
on  a  month-to-month  basis.  The  Company  retains  independent  geologic  and
engineering  consultants  from time to time on a limited  basis and  expects  to
continue to do so in the future.

Office Facilities

        The Company's  executive and  administrative  offices are located at 500
North Loop 1604 East,  Suite 100, San Antonio,  Texas 78232.  The Company owns a
16%  limited  partnership  interest  in the  partnership  which owns this office
building.  The Company  also has an office in  Midland,  Texas.  These  offices,
consisting  of  approximately  12,650  square feet in San Antonio and 960 square
feet in Midland, are leased until March 2006 at an aggregate rate of $18,000 per
month.  Cascade  leaves 8,683  square feet of office  space in Calgary,  Alberta
pursuant to a lease which expires December 31, 2001 at a rate of CDN $15,000 per
month.

Other Properties

        The  Company  owns 10 acres  of  land,  an  office  building,  workshop,
warehouse and house in Sinton,  Texas,  160 acres of land in Coke County,  Texas
and a 50% interest in  approximately  2.0 acres of land in Bexar County,  Texas.
All  three  properties  are used for the  storage  of  tubulars  and  production
equipment.  The  Company  also owns 19  vehicles  which are used in the field by
employees.

Litigation

        Hornburg  Litigation.  In  1995,  John H.  Hornburg  and  certain  other
individuals  filed a law suit against the Company alleging  negligence and gross
negligence,  tortious interference with contract, conversion and waste. In March
1998,  a jury found  against  the  Company in the amount of  $1,332,825.00  plus
attorneys  fees and  pre-judgment  interest.  At March 31, 1998, no judgment had
been  entered.  The  Company  intends  to  file  various  post-judgment  motions
including a motion for judgment notwithstanding the verdict and a motion for new
trial,  as well as an appeal,  if necessary.  The Company has not  established a
reserve to account for the damages awarded to the plaintiffs by the jury.

        Other  Litigation.  From  time to  time,  the  Company  is  involved  in
litigation relating to claims arising out of its operations in the normal course
of  business.  As of March 31,  1998,  the  Company was not engaged in any legal
proceedings  that are  expected,  individually  or in the  aggregate,  to have a
material adverse effect on the Company.

                                       51
<PAGE>

                                          MANAGEMENT

Directors and Executive Officers

        Set forth below are the names,  ages,  years of service and positions of
the executive  officers and directors of Abraxas , as well as certain  executive
officers of Cascade and Canadian  Abraxas.  The term of the Class I directors of
Abraxas  expires in 1999,  the Class II directors  expires in 2000 and the Class
III directors in 1998.
<TABLE>
<CAPTION>

Name                      Age                           Office                           Class

<S>                       <C>    <C>                                                         <C>
Robert L. G. Watson       47     Chairman of the Board,  President and Chief Executive
                                 Officer  of  Abraxas;   Chairman  of  the  Board  and
                                 director   of   Cascade;   Chairman   of  the  Board,
                                 President and director of Canadian Abraxas                  III
Chris E. Williford        46     Executive Vice President,  Chief  Financial  Officer,
                                 Treasurer  and  director of Abraxas;  Vice  President
                                 and Assistant Secretary of Canadian Abraxas                 III
Robert Patterson          40     Vice President/Operations of Abraxas                         --
Stephen T. Wendel         49     Vice President/Land and Marketing of Abraxas                 --
Franklin A. Burke         63     Director of Abraxas                                           I
Harold D. Carter          58     Director of Abraxas                                           I
Robert D. Gershen         44     Director of Abraxas                                           I
Richard M. Kleberg, III   55     Director of Abraxas                                          II
James C. Phelps           75     Director of Abraxas                                         III
Paul A. Powell, Jr.       52     Director of Abraxas                                          II
Richard M. Riggs          77     Director of Abraxas                                          II
Roger L. Bruton           65     Executive  Vice  President  and  director of Cascade;
                                 Executive  Vice  President  and  director of Canadian        --
                                 Abraxas
Donald A. Engle           54     President  and  director  of Cascade;  Secretary  and        --
                                 director of Canadian Abraxas
</TABLE>

        Robert L. G.  Watson has  served as  Chairman  of the Board,  President,
Chief  Executive  Officer and a director of Abraxas since 1977.  Since May 1996,
Mr. Watson has also served as Chairman of the Board, Chief Executive Officer and
director of Grey Wolf and  Chairman  of the Board and a director of Cascade.  In
November 1996, Mr. Watson was elected Chairman of the Board,  President and as a
director of Canadian Abraxas.  Prior to joining Abraxas, Mr. Watson was employed
in various petroleum engineering positions with Tesoro Petroleum Corporation,  a
crude oil and natural gas exploration and production company,  from 1972 through
1977, and DeGolyer & McNaughton, an independent petroleum engineering firm, from
1970 to 1972.  Mr.  Watson  received a Bachelor of Science  degree in Mechanical
Engineering from Southern Methodist  University in 1972 and a Master of Business
Administration degree from the University of Texas at San Antonio in 1974.

        Chris E.  Williford  was elected  Vice  President,  Treasurer  and Chief
Financial  Officer of Abraxas in January 1993,  and as Executive  Vice President
and a director  of Abraxas in May 1993.  In November  1996,  Mr.  Williford  was
elected  Vice  President,  Assistant  Secretary  and as a director  of  Canadian
Abraxas.  Prior to joining Abraxas, Mr. Williford was Chief Financial Officer of
American Natural Energy Corporation, a crude oil and natural gas exploration and
production  company,  from July 1989 to  December  1992 and  President  of Clark
Resources Corp., a crude oil and natural gas exploration and production company,
from  January  1987 to May 1989.  Mr.  Williford  received a Bachelor of Science
degree in Business Administration from Pittsburgh State University in 1973.

        Robert  Patterson  has  served as Vice  President/Operations  of Abraxas
since December 1995. From 1986 to 1995, Mr. Patterson was employed by Parker and
Parsley Petroleum USA most recently as a Gulf Coast Division  Manager.  Prior to
that, Mr.  Patterson was District  Manager for HCW Exploration from 1983 to 1986
and Drilling  Engineer  with  Hilliard  Oil and Gas from 1980 to 1983.  Prior to
that,  he was a Drilling  Engineer  with Texas  Pacific Oil Company from 1979 to


                                       52
<PAGE>

1980. Mr. Patterson is a registered  Professional Engineer in the state of Texas
and graduated  with a Bachelor of Science degree in petroleum  engineering  from
the University of Texas in 1979.

        Stephen T. Wendel has served as Vice  President/Land  and  Marketing  of
Abraxas since 1990 and Corporate  Secretary of Abraxas since 1994.  From 1982 to
1990,  Mr. Wendel served  Abraxas as Manager of Joint  Interests and Natural Gas
Contracts.  Prior to joining  Abraxas,  Mr.  Wendel was employed in  accounting,
auditing and marketing  positions with Tenneco Oil Company and Tesoro  Petroleum
Corporation,   both  crude  oil  and  natural  gas  exploration  and  production
companies.  Mr. Wendel received a Bachelor of Business  Administration degree in
Accounting from Texas Lutheran University in 1971.

        Franklin A. Burke,  a director of Abraxas since June 1992, has served as
President and Treasurer of Venture  Securities  Corporation since 1971, where he
is in charge of research and  portfolio  management.  He has also been a general
partner and director of Burke,  Lawton,  Brewer & Burke, a securities  brokerage
firm, since 1964, where he is responsible for research and portfolio management.
Mr.  Burke also  serves as a director of NB  Instruments,  Inc.,  an  instrument
products company,  Omega Institute,  a job training entity, and Starkey Chemical
Process Co., a chemical  processing  company.  Mr. Burke  received a Bachelor of
Science  degree in Finance  from Kansas  State  University  in 1955,  a Master's
degree in  Finance  from  University  of  Colorado  in 1960 and  studied  at the
graduate level at the London School of Economics from 1962 to 1963.

        Harold D.  Carter,  has served as a director  of the  Abraxas  since May
1996.  Mr. Carter has more than 30 years  experience in the oil and gas industry
and has been an independent  consultant  since 1990.  Prior to  consulting,  Mr.
Carter served as Executive  Vice  President of Pacific  Enterprises  Oil Company
(USA).  Before  that,  Mr.  Carter  was  associated  for 20  years  with  Sabine
Corporation,  ultimately  serving as President and Chief Operating  Officer from
1986 and 1989. Mr. Carter consults for Endowment Advisors,  Inc. with respect to
its EEP  Partnerships and Associated  Energy Managers,  Inc. with respect to its
Energy Income Fund, L.P. and is a director of Brigham Exploration  Company.  Mr.
Carter has a B.B.A.  in Petroleum Land  Management  from the University of Texas
and  has  completed  the  Program  for  Management  Development  at the  Harvard
University Business School.

        Robert D. Gershen,  a director of Abraxas since May 1995,  has served as
President  of  Associated   Energy   Managers,   Inc.,  an  investment   manager
specializing  in  structuring  and managing  private  investments  in the energy
industry,  since July 1989. Mr.  Gershen has served as an investment  advisor to
Endowment  Energy  Partners,  L.P. and  Endowment  Energy  Partners II,  Limited
Partnership, limited partnerships formed to make loans to companies in the crude
oil and natural gas business, since October 1989 and January 1993, respectively.

        Richard M. Kleberg,  III, a director of Abraxas since December 1983, has
held the  position  of  managing  partner of SFD  Enterprises,  Ltd.,  a private
investment  partnership,  since  1980.  Mr.  Kleberg has served on the boards of
directors of Cullen Frost  Bankers,  Inc., a bank holding  company,  since 1992;
1776  Restaurants,  Inc., a restaurant  concern,  since 1983; The Frost National
Bank of San Antonio, a national banking  association,  since 1984; and Kleberg &
Co.  Bankers,  Inc., a bank holding  company,  since 1980.  Mr.  Kleberg holds a
Bachelor of Science degree in Political Science from Trinity University.

        James C. Phelps,  a director of Abraxas since  December 1983, has been a
consultant to crude oil and natural gas  exploration  and  production  companies
such as Panhandle Producing Company and Tesoro Petroleum Corporation since April
1981.  Mr.  Phelps has served as a director of Grey Wolf since April 1995 and of
Cascade since January  1996.  From April 1995 to May 1996,  Mr. Phelps served as
Chairman of the Board and Chief Executive Officer of Grey Wolf, and from January
1996 to May  1996,  he  served as  President  of  Cascade.  From  March  1983 to
September  1984,  he served as President of Osborn  Heirs  Company,  a privately
owned crude oil  exploration  and production  company based in San Antonio.  Mr.
Phelps was President and Chief Operating Officer of Tesoro Petroleum Corporation
from 1971 to 1981 and prior to that was Senior Vice  President  and Assistant to
the  President of  Continental  Oil  Company.  He received a Bachelor of Science
degree in Industrial  Engineering  and a Master of Science  degree in Industrial
Engineering from Oklahoma State University.

                                       53
<PAGE>

        Paul A.  Powell,  Jr., a director of Abraxas  since 1987,  is  currently
Trustee  of the Paul A.  Powell  Trust  and has  served  as Vice  President  and
Director of  Mechanical  Development  Co.,  Inc., a tool and die and  production
machine  company,  since 1984.  He also serves as trustee of sixteen  investment
trusts.  Mr.  Powell is a director and officer of Frameco,  Inc., a tool and die
and  production  machine  company,  Somerset  Investments,  Ltd.,  an investment
company,  and Powell Lake  Properties,  a real estate  investment and management
company.  He  attended  Emory and Henry  College  and  graduated  from  National
Business College with a degree in Accounting.

        Richard M. Riggs,  a director of Abraxas since 1985, is a  self-employed
geological  consultant.  He served as Vice President of Petro Consultants Energy
Corporation,  a crude oil and natural gas  exploration  and production  company,
from June 1978 to December  1984.  Mr. Riggs has served as a director of Cascade
since May 1996. He has previously been employed by Tesoro Petroleum Corporation,
a crude oil and natural gas exploration and production  company,  as Exploration
Vice President for North America, and prior to that time was Manager of Domestic
Exploration  for Ashland Oil, Inc., a crude oil and natural gas  exploration and
production company.  Mr. Riggs graduated with a Bachelors degree in Geology from
Dartmouth College and a Masters degree in Geology from Columbia University.

        Roger L. Bruton is currently  Executive Vice President and a director of
Cascade.  From January 1996 to October  1996, he served as President of Cascade.
In November 1996, Mr. Bruton was elected Vice President of Canadian  Abraxas and
in December 1996 was elected as a director of Canadian Abraxas. Prior to joining
Cascade,  Mr.  Bruton  served as a geologist  with  Panhandle  Eastern  Pipeline
Company from 1958 to 1963.  From 1976 to 1977 he served as Regional  Exploration
Manager for Anadarko  Production  Company. He also served as Exploration Manager
for the western United States and Canada for General Crude Oil Company from 1977
to 1979.  From 1984 to 1990,  Mr.  Bruton  served as  President  of Western  Oil
Corporation and Plains Petroleum Corporation,  both of which are subsidiaries of
KN Energy.  Mr.  Bruton was Regional  General  Manager of Anadarko  Petroleum of
Canada Ltd. from 1972 to 1976. Mr. Bruton received a Bachelors of Science degree
in  Geology  and a Masters  of  Science  degree in  Geology  from  Kansas  State
University.

        Donald A. Engle, is currently President and a director of Cascade.  From
January  1996 to  October  1996,  he served as Vice  President  of  Cascade.  In
November  1996,  Mr. Engle was elected  Secretary  and as a director of Canadian
Abraxas.  From 1985 to 1995, he was President of Sapphire Resources,  Ltd. Prior
to that, Mr. Engle served as President of Neomar Resources  Limited from 1980 to
1985 and as General Manager of Anadarko Petroleum of Canada Limited from 1976 to
1979.  Mr. Engle  received a Bachelor of Commerce  degree from the University of
Saskatchewan.

Executive Compensation

Compensation Summary

        The following table sets forth a summary of compensation  for the fiscal
years ended December 31, 1995,  1996 and 1997 paid by the Company to Robert L.G.
Watson, the Chairman of the Board,  President and Chief Executive Officer of the
Company,  Chris E.  Williford,  the Executive Vice  President,  Chief  Financial
Officer and Treasurer of the Company,  and Stephen T. Wendel, the Company's Vice
President-Land  and Marketing  and to Robert E.  Patterson,  the Company's  Vice
President of Operations for the fiscal year ended December 31, 1997. Abraxas did
not have any executive  officers other than Messrs.  Watson and Williford  whose
total annual salary and bonus exceeded $100,000 for the years ended December 31,
1995, and Messrs.  Watson,  Williford,  Patterson and Wendel for the years ended
December 31, 1996 and 1997.

                                       54
<PAGE>

                                  SUMMARY COMPENSATION TABLE

                                                               Long Term
                                                              Compensation
                                                              -------------  
                                  Annual Compensation            Awards
                           ---------------------------------- -------------
                                                                Options
   Name and Principal                                            /SARs
   Position                Year    Salary ($)     Bonus ($)       (#)
   ----------------------- ------ -------------- ------------ -------------

   Robert L. G. Watson,    1995     $108,281 (1)       --         60,000
   Chairman  of the Board  1996     $133,187 (2)  $135,550 (3)   140,000
   and President           1997     $211,154      $ 39,373 (4)   100,000

   Chris E. Williford,     1995     $115,795 (5)       --         20,000
   Executive Vice          1996     $121,315      $ 72,000 (4)    40,000
   President,              1997     $148,269      $ 26,250 (4)    40,000
   Chief Financial
   Officer
   and Treasurer

   Robert E. Patterson,    1996     $124,615      $ 35,000 (4)    60,000
   Vice President of       1997     $148,269      $  9,375 (4)    50,000
   Operations

   Stephen T. Wendel,      1995     $ 63,210           --         20,000
   Vice President - Land   1996     $ 76,577      $ 40,000 (4)    18,660
   and Marketing           1997     $106,731      $ 13,750 (4)    25,000
   ----------------------- ------ -------------- ------------ -------------

- --------

(1) Mr. Watson received a repayment of loans to Abraxas of $354,677 during 1995.
(2) Includes $1,093 of stock awards and $107,188 of salary.
(3) Includes $95,000 in cash and $40,550 of stock awards.
(4) One-half paid in cash and one-half in stock awards.
(5) Includes $8,607 of stock awards and $107,188 of salary.



Grants of Stock  Options and Stock  Appreciation  Rights  During the Fiscal Year
Ended December 31, 1997

        Pursuant to the  Abraxas  Petroleum  Corporation  1984  Incentive  Stock
Option  Plan  (the "ISO  Plan"),  the  Abraxas  Petroleum  Corporation  1993 Key
Contributor  Stock  Option  Plan (the  "1993  Plan") and the  Abraxas  Petroleum
Corporation  1994 Long Term Incentive  Plan (the "LTIP"),  the Company grants to
employees  and officers of the Company  (including  directors of the Company who
are also employees) incentive stock options and non-qualified stock options. The
ISO  Plan,  the 1993  Plan and the LTIP  are  administered  by the  Compensation
Committee which,  based upon the  recommendation of the Chief Executive Officer,
determines the number of shares subject to each option.

        The table below contains  certain  information  concerning stock options
granted to Messrs. Watson, Williford, Patterson and Wendel during 1997:

                                       55
<PAGE>

                           OPTION GRANTS IN FISCAL YEAR
- -------------------------------------------------------------------------------
                     % of                                Potential Realizable
                     Total      Exercise                   Value at Assumed
           Options   Options    Price Per   Expiration  Annual Rates of Stock
   Name     Granted  Granted      Share        Date       Price Appreciation
                      to                                    for Option Term
                      Employees
========== ========= ========== =========== =========== =========== ===========
                                                            5%         10%
Robert      100,000     35.1       7.44      3/26/07    $1,211,898  $1,929,744
L. G.
Watson

Chris E.     40,000     14.0       7.44      3/26/07       484,579     771,898
Williford

Robert E.    50,000     17.5       7.44      3/26/07       605,949     964,872
Patterson

Stephen T.   25,000     8.8        7.44      3/26/07       302,974     482,436
Wendel
- --------------

(1)  One-fourth  of the  options  become  exercisable  on each of the first four
anniversaries of the date of grant.

        The table below contains  certain  information  concerning  exercises of
stock options during the fiscal year ended December 31, 1997 by Messrs.  Watson,
Williford,  Patterson  and Wendel and the fiscal  year end value of  unexercised
options held by Messrs. Watson, Williford, Patterson and Wendel.
<TABLE>
<CAPTION>

                          Aggregated Option Exercises in Fiscal 1997
                              and Fiscal Year End Option Values

                                                                                  Value of
                                                               Number of         Unexercised
                                                              Unexercised       in-the-Money
                                                              Options on         Options on
                                                           December 31,1997     December 31,
                                                                  (#)             1997 ($)
                     Shares Acquired                         Exercisable/        Exercisable/
       Name           By Exercise (#)    Value Realized      Unexercisable      Unexercisable
                                               ($)

<S>                         <C>                <C>           <C>               <C>        
Robert L. G. Watson         -0-                -0-           65,000/235,000    518,750/1,476,250

Chris E. Williford          -0-                -0-           40,000/80,000     325,000/495,000

Robert E. Patterson         -0-                -0-           14,998/95,002     122,484/567,516

Stephen T. Wendel           -0-                -0-           29,005/48,995     238,954/301,451
</TABLE>

Long Term Incentive Plan Awards During the Fiscal Year Ended December 31, 1997

        The Company did not make any awards to any of Messrs. Watson, Williford,
Patterson  and Wendel  under a long term  incentive  plan during the fiscal year
ended December 31, 1997.

                                       56
<PAGE>

Employment Agreements

        The Company has entered  into  Employment  Agreements  (the  "Employment
Agreements")  with each of Messrs.  Watson,  Williford,  Patterson and Wendel as
well as with Jack M. Roney, Abraxas' Vice President-Corporate  Development,  and
Lowell Lischer,  Abraxas' and Vice President of  Exploration,  pursuant to which
each of Messrs.  Watson,  Williford,  Patterson,  Wendel, Roney and Lischer will
receive  compensation  as determined  from time to time by the Board in its sole
discretion. The Employment Agreements terminate on December 31, 1998 except that
the term of the  Employment  Agreements  may be  automatically  extended  for an
additional  year if by  December 1 of the prior year  neither  the  Company  nor
Messrs. Watson, Williford,  Patterson, Wendel, Roney or Lischer, as the case may
be, has given  notice  that it does not wish to extend  the term.  Except in the
event of a change in  control,  at all times  during the term of the  Employment
Agreements,  each  of  Messrs.  Watson's,  Williford's,  Patterson's,  Wendel's,
Roney's and Lischer's employment is at will and may be terminated by the Company
for any reason without notice or cause. If a change in control occurs during the
term of the Employment  Agreement or any extension thereof,  the expiration date
of Mr.  Watson's  Employment  Agreement is  automatically  extended to a date no
earlier than five years  following the effective date of such change in control,
the expiration date of Mr.  Williford's  Employment  Agreement is  automatically
extended to a date no earlier than four years  following the  effective  date of
such change in control and the expiration date of each of Mr.  Patterson's,  Mr.
Wendel's,  Mr. Roney's and Mr. Lischer's  Employment  Agreement is automatically
extended to a date no earlier than three years  following the effective  date of
such change in control.  If,  following a change in control,  Messrs.  Watson's,
Williford's,   Patterson's,   Wendel's,   Roney's  or  Lischer's  employment  is
terminated  other  than  for  Cause  (as  defined  in  each  of  the  Employment
Agreements) or Disability (as defined in each of the Employment Agreements),  by
reason of  Messrs.  Watson's,  Williford's,  Patterson's,  Wendel's,  Roney's or
Lischer's  death or  retirement  or by  Messrs.  Watson,  Williford,  Patterson,
Wendel,  Roney or  Lischer,  as the case may be,  other than for Good Reason (as
defined in each of the Employment Agreements),  then Mr. Watson will be entitled
to receive a lump sum payment  equal to five times his annual base  salary,  Mr.
Williford will be entitled to receive a lump sum payment equal to four times his
annual base salary and Messrs. Patterson, Wendel, Roney and Lischer will each be
entitled  to receive a lump sum  payment  equal to three  times his annual  base
salary.  If any such lump sum payment  would  individually  or together with any
other amounts paid or payable  constitute an "excess  parachute  payment" within
the meaning of Section  280G of the Internal  Revenue  Code of 1986,  as amended
("Section  280G"),  and  applicable  regulations  thereunder  (the "Code"),  the
amounts  to be  paid  will  be  increased  so that  Messrs.  Watson,  Williford,
Patterson,  Wendel,  Roney or  Lischer,  as the case may be, will be entitled to
receive the amount of compensation provided in his contract after payment of the
tax imposed by Section 280G.

Compensation of Directors

        Non-Qualified Stock Option Plan. Messrs. Burke, Kleberg,  Phelps, Powell
and Riggs have  previously  been  granted  options to purchase  8,900  shares of
Common  Stock under the  Company's  1984  Non-Qualified  Stock  Option Plan (the
"Non-Qualified Plan"). There are currently outstanding options to purchase 8,900
shares of Common  Stock under the  Non-Qualified  Plan at an  exercise  price of
$6.75 per share.

        Restricted Share Plan for Directors.  Pursuant to the Abraxas  Petroleum
Corporation  Restricted  Share Plan for Directors  (the "Director  Plan"),  each
director of the Company, other than Messrs. Watson and Williford, is entitled to
receive compensation for attendance at regular and special meetings of the Board
of Directors.  Initially  each  eligible  director of the Company was issued 400
shares of Common Stock during 1994 as an initial  grant under the Director  Plan
and thereafter  received a number of shares of Common Stock equal to the product
of 1,000  times the  Capitalization  Factor (as  defined in the  Director  Plan)
divided by the Average  Stock Price (as defined in the Director  Plan) as of the
date of a meeting  of the  Board.  In 1997,  the  Director  Plan was  amended to
provide that one-half of the compensation  under the Director Plan shall be paid
in cash and one-half in shares of Abraxas  Common Stock.  For 1997,  each of the
directors,   received   the   number  of   shares  of  Common   Stock  and  cash
compensationset forth opposite his name under the Director Plan:

                                       57
<PAGE>

Name                                    Number of          Cash Compensation
                                         Shares
                                     ----------------     --------------------
Franklin M. Burke                           846                 $2,000
Harold D. Carter                            825                  2,000
Robert D. Gershen                         1,115                  2,000
Richard M. Kleberg                          318                  2,500
James C. Phelps                             318                  2,500
Paul A. Powell                            1,098                  2,000
Richard M. Riggs                            318                  2,500

        Director   Stock  Option  Plan.   Pursuant  to  the  Abraxas   Petroleum
Corporation Director Stock Option Plan, each non-employee member of the Board of
Directors of the Company on June 1, 1996 was granted an option to purchase 8,000
shares of Common Stock at a price of $6.75 per share.  Each person who becomes a
director after that date will also be granted an option to purchase 8,000 shares
of Common  Stock at the then  prevailing  price of the Common Stock as quoted on
the Nasdaq National Market. In addition,  in March 1998, the Plan was amended to
provide that each  non-employee  member of the Board of Directors as of the date
of the first meeting of the Board of Directors in each year will receive options
to purchase  2,000 shares of common stock at the closing  price of the Company's
Common  Stock on such  date.  On March  25,  1998,  each  non-employee  Director
received options to purchase 2,000 shares of Common Stock.

        Other  Compensation.  The  directors  of the  Company  received no other
compensation  for  services as  directors,  except for  reimbursement  of travel
expenses to attend Board meetings.

                                       58
<PAGE>


                              CERTAIN TRANSACTIONS

               Messrs.  Watson,  Phelps and Riggs were founders of Grey Wolf and
in April  1995  purchased  900,000  shares  of the  capital  stock of Grey  Wolf
(initially  representing  39% of the  outstanding  shares) for an  aggregate  of
CDN$90,000  (or  CDN$0.10  per share) in cash.  In  January  1996,  the  Company
purchased  20,325,096 shares of the capital stock of Grey Wolf (representing 78%
of the outstanding shares) for an aggregate of approximately CDN$4.1 million (or
CDN$.20 per share) in cash. Messrs.  Phelps, Riggs and Watson currently own 5.1%
of the issued and outstanding capital stock of Casecade.

        Messrs.  Phelps and Riggs own options to purchase in the aggregate up to
1,000,000 shares of capital stock of Cascade at an exercise price of CDN$.20 per
share, and Mr. Watson owns options to purchase up to 800,000 shares of Cascade's
capital stock at an exercise price of CDN$.20 per share.  Cascade  currently has
76,981,000 shares of capital stock outstanding.

        Wind River  Resources  Corporation  ("Wind  River"),  all of the capital
stock of which is owned by Mr. Watson, owns a twin-engine airplane. The airplane
is  available  for business use by employees of the Company from time to time at
Wind  River's  cost.  The Company paid Wind River a total of $330,000 for use of
the plane during 1997.


        Cascade  owns a 10%  interest in the  Canadian  Abraxas  Properties  and
Canadian Abraxas Plants and an 8% interest in the Pacalta Properties and manages
the operations of Canadian  Abraxas pursuant to a management  agreement  between
Canadian Abraxas and Cascade.  Under the management agreement,  Canadian Abraxas
reimburses  Cascade for reasonable  costs or expenses  attributable  to Canadian
Abraxas and for administrative  expenses based upon the percentage that Canadian
Abraxas' gross revenue bears to the total gross revenue of Canadian  Abraxas and
Cascade.  In 1997,  Canadian  Abraxas paid Cdn $1,239,998 to Cascade pursuant to
the management agreement.

        Abraxas has adopted a policy that transactions, including loans, between
Abraxas and its officers,  directors,  principal stockholders,  or affiliates of
any of them,  will be on terms no less favorable to Abraxas than can be obtained
on an arm's length basis in transactions with third parties and must be approved
by the vote of at least a majority of the disinterested directors.

                                       59
<PAGE>


                 SECURITIES HOLDINGS OF PRINCIPAL STOCKHOLDERS,
                             DIRECTORS AND OFFICERS

        Based upon information received from the persons concerned,  each person
known to the Company to be the beneficial owner of more than five percent of the
outstanding shares of Common Stock of Abraxas, each director and officer and all
directors and officers of Abraxas as a group, owned beneficially as of March 31,
1998 the number and percentage of outstanding  shares of Common Stock of Abraxas
indicated in the following table:



     Name and Address of
      Beneficial Owner         Number of Shares         Percentage
                                      (1)

Robert L. G. Watson              324,505 (2)                4.91
Endowment Advisors, Inc.         863,790 (3)               13.54
     450 Post Road East
     Westport, CT  06881
Wellington Management Company    505,000 (4)                7.92
     75 State Street
     19th Floor
     Boston, MA 02109
State Street Research &          
Management Company               375,000(5)                 5.92
     One  Financial   Center,
30th Floor
     Boston, MA 02111
Dimensional   Fund  Advisors,    
Inc.                             344,900 (6)                5.41
     1299 Ocean Avenue
     11th Floor
     Santa Monica, CA 90401
Franklin A. Burke                117,468 (7)                1.78
Paul A. Powell, Jr.               35,389 (8)                *
James C. Phelps                   36,125 (9)                *
Richard M. Kleberg, III           34,032 (10)               *
Robert D. Gershen                 26,804 (11)               *
Chris E. Williford                49,345 (12)               *
Richard M. Riggs                  16,331 (13)               *
Harold D. Carter                  10,318 (14)               *
Robert E. Patterson               27,223 (15)               *
Stephen T. Wendel                 35,995 (16)               *
All  Officers  and  Directors    713,535 (2)(7)(8)         11.00
as a  Group (11 persons)                 (9)(10)
                                         (11)(12)
                                         (13)(14)
                                         (15)(16)


- ---------
   *  Less than 1%

(1)     Unless  otherwise  indicated,  all  shares are held  directly  with sole
        voting and investment power.

(2)     Includes  20,316  shares owned by Wind River  Resources  Corporation,  a
        corporation  owned by Mr. Watson, as to which Mr. Watson has sole voting
        and investment  power,  21,907 shares  issuable upon exercise of options
        granted pursuant to Abraxas  Petroleum  Corporation 1993 Key Contributor
        Stock Option Plan and 58,093  shares  issuable  upon exercise of options


                                       60
<PAGE>

        granted  pursuant to the Abraxas  Petroleum  Corporation  1994 Long Term
        Incentive  Plan.  Does not include a total of 75,880 shares owned by the
        Robert  L. G.  Watson,  Jr.  Trust and the Carey B.  Watson  Trust,  the
        trustees of which are Mr.  Watson's  brothers and the  beneficiaries  of
        which  are  Mr.  Watson's  children.  Mr.  Watson  disclaims  beneficial
        ownership of the shares owned by these trusts.

(3)     Includes  643,585  shares  of Common  Stock  owned by  Endowment  Energy
        Partners,  L.P.  ("EEP")  and  220,205  shares of Common  Stock owned by
        Endowment  Energy Partners II, Limited  Partnership  ("EEP II"). EEP and
        EEP  II  are  limited   partnerships  whose  investors  are  educational
        institutions  and which were  formed to make loans to  companies  in the
        crude oil and natural gas business.  The general partner of both EEP and
        EEP II is  Fairfield  Partners,  Inc.  (Del.)  ("Fairfield")  which is a
        wholly-owned  subsidiary of Endowment Advisers, Inc. ("EAI"), a Delaware
        nonstock corporation  controlled by its trustees and management.  Voting
        and investment power over the shares held by EEP and EEP II is exercised
        by the Board of Trustees of EAI, and by Susan J. Carter, the Senior Vice
        President and Chief  Operating  Officer of both EAI and  Fairfield.  The
        trustees of EAI are principally  individuals who are financial  officers
        of   educational   institutions   that  have   invested  in   investment
        partnerships sponsored by EAI, including EEP and EEP II.

(4)     Wellington  Management  Company is an  investment  manager which has the
        power to make investment decisions for unrelated clients.

(5)     State Street  Research &  Management  Company is an  investment  manager
        which has the power to make investment decisions for unrelated clients.

(6)     Persons who are officers of Dimensional Fund Advisors Inc. also serve as
        officers of DFA Investment  Dimensions  Group, Inc. (the "Fund") and The
        DFA Investment Trust Company (the "Trust"),  each an open-end management
        investment  company registered under the Investment Company Act of 1940.
        In their capacities as officers of the Fund and the Trust, these persons
        vote 50,000  shares which are owned by the Fund and 57,200  shares which
        are owned by the Trust.

(7)     Includes 8,900 shares issuable upon exercise of options granted pursuant
        to the Abraxas  Petroleum  Corporation 1984  Non-Qualified  Stock Option
        Plan and 2,000 shares issuable upon exercise of options granted pursuant
        to the Director Option Plan.

(8)     Includes 4,228 shares owned by Mechanical  Development Co., Inc., all of
        the  outstanding  capital  stock of which  is  owned by  members  of Mr.
        Powell's  family,  13,998  shares  owned by the Paul A. Powell  Trust of
        which Mr.  Powell is a trustee  and his family  members  are the primary
        beneficiaries, 51 shares owned by the Paul A. Powell Individual Trust of
        which Mr. Powell is a trustee,  and 63 shares owned by NAD Properties of
        which Mr.  Powell is a general  partner.  Mr.  Powell  shares voting and
        investment  power as to all of such shares.  Also includes  2,000 shares
        issuable  upon  exercise of options  granted  pursuant  to the  Director
        Option Plan.

(9)     Includes 8,000 shares owned by Marie Phelps,  Mr. Phelps' wife and 2,000
        shares  issuable  upon  exercise  of  options  granted  pursuant  to the
        Director Option Plan.

(10)    Includes  16,688  shares  owned  by SFD  Enterprises,  Ltd.,  a  private
        investment  partnership,  and 2,000  shares  issuable  upon  exercise of
        options granted pursuant to the Director Option Plan. Mr. Kleberg shares
        voting and investment power as to the shares owned by SFD Enterprises.

(11)    Includes  warrants to purchase  13,500 shares of Common Stock at a price
        of $7.00  per share  owned by  Associated  Energy  Managers,  Inc.,  the
        principal  shareholder  and  Chief  Executive  Officer  of  which is Mr.
        Gershen,  and 2,000 shares  issuable  upon  exercise of options  granted
        pursuant to the Director Option Plan.

(12)    Includes 1,786 shares issuable upon exercise of options granted pursuant
        to the Abraxas  Petroleum  Corporation 1984 Incentive Stock Option Plan,


                                       61
<PAGE>

        18,214 shares issuable upon exercise of options granted  pursuant to the
        Abraxas Petroleum Corporation 1993 Key Contributor Stock Option Plan and
        25,000 shares issuable upon exercise of options granted  pursuant to the
        Abraxas Petroleum Corporation 1994 Long
        Term Incentive Plan.

(13)    Includes  700 shares  owned by the Riggs Family Trust of which Mr. Riggs
        is one of the trustees,  1,000 shares owned jointly by Mr. Riggs and his
        wife and 2,000 shares issuable upon exercise of options granted pursuant
        to the Director Option Plan.

(14)    Includes 2,000 shares issuable upon exercise of options granted pursuant
        to the Director Option Plan.

(15)    Includes  25,000  shares  issuable  upon  exercise  of  options  granted
        pursuant to the Abraxas  Petroleum  Corporation 1994 Long Term Incentive
        Plan.

(16)    Includes 4,340 shares issuable upon exercise of options granted pursuant
        to the Abraxas  Petroleum  Corporation 1984 Incentive Stock Option Plan,
        10,000 shares issuable upon exercise of options granted  pursuant to the
        Abraxas Petroleum Corporation Key 1993 Contributor Stock Option Plan and
        19,665 shares issuable upon exercise of options granted  pursuant to the
        Abraxas Petroleum Corporation 1994 Long
        Term Incentive Plan.


                                       62
<PAGE>


                        DESCRIPTION OF THE EXCHANGE NOTES


        The Series C Notes have been and the Exchange Notes will be issued under
an  indenture  (the  "Indenture")  by and  among  the  Issuers,  the  Subsidiary
Guarantors  and IBJ Schroder Bank & Trust Company,  as Trustee (the  "Trustee"),
the  terms of which  are  substantially  similar  to  those  of the  Series  A/B
Indenture. The following summary of certain provisions of the Indenture does not
purport to be complete  and is subject to, and is  qualified  in its entirety by
reference to, the Trust  Indenture  Act of 1939, as amended (the "TIA"),  and to
all of the  provisions of the  Indenture,  including the  definitions of certain
terms  therein and those terms made a part of the  Indenture by reference to the
TIA as in effect on the date of the  Indenture.  A copy of the form of Indenture
may be obtained from the Issuers.  The definitions of certain  capitalized terms
used  in  the   following   summary  are  set  forth  below  under  "--  Certain
Definitions."

        The Series B Notes and the Series C Notes are,  and the  Exchange  Notes
will be, general  unsecured  obligations of the Issuers and will rank pari passu
in right of  payment  to all  existing  and future  senior  indebtedness  of the
Issuers and senior in right of payment to any subordinated indebtedness incurred
by the Issuers in the future.  The Series B Notesand Series C Notes are, and the
Exchange Notes will be, however, effectively subordinated in right of payment to
all existing and future secured indebtedness of the Issuers to the extent of the
value of the assets securing such  indebtedness.  At March 31, 1998, the Issuers
had $275.1 million in outstanding  Indebtedness,  $100,000 of which was secured.
The Indenture  permits the Company to incur additional  indebtedness,  including
additional secured indebtedness,  under certain circumstances. See "Risk Factors
- -- High Degree of  Leverage,"  "Capitalization,"  and "-- Certain  Covenants  --
Limitation on Incurrence of Additional Indebtedness."

        The Exchange Notes will be issued in fully registered form only, without
coupons,  in denominations of $1,000 and integral multiples thereof.  Initially,
the Trustee will act as paying  agent and  registrar  for the Exchange  Exchange
Notes.  The Exchange  Notes may be presented  for  registration  of transfer and
exchange at the offices of the registrar,  which initially will be the Trustee's
corporate  trust  office.  The Issuers may change any paying agent and registrar
without  notice to holders of the Exchange  Notes  (together with the holders of
the Series C Notes, the "Holders"). The Issuers will pay principal (and premium,
if any) on the Exchange Notes at the Trustee's corporate office in New York, New
York. At the Issuers'  option,  interest may be paid at the Trustee's  corporate
trust office or by check mailed to the registered  addresses of the Holders. Any
Series C Notes that remain  outstanding  after the  completion  of the  Exchange
Offer,  together with the Exchange Notes issued in connection  with the Exchange
Offer, will be treated as a single class of securities under the Indenture.  See
"-- Registration Rights; Liquidated Damages."

Principal, Maturity and Interest

        The  Exchange  Notes will be limited in  aggregate  principal  amount to
$275,000,000  provided that $215,000,000 of Exchange Notes reserved for issuance
under the Indenture  will be available  only in connection  with the exchange of
Series B Notes for the  Exchange  Notes  pursuant to the  Exchange  Offer.  Each
Exchange  Note will mature on November 1, 2004.  Interest on the Exchange  Notes
will  accrue at the rate of 11 1/2% per annum and will be payable  semi-annually
in cash on each May 1 and November 1,  commencing on May 1, 1998, to the Persons
who are  registered  Holders of Exchange Notes at the close of business on April
15 and October 15, respectively,  immediately  preceding the applicable interest
payment date.  Interest on the Exchange Notes will accrue from and including the
most recent  date to which  interest  has been paid or, if no interest  has been
paid, from and including the date of issuance.

        The Exchange  Notes will not be entitled to the benefit of any mandatory
sinking fund.

Guarantees

        The  Issuer's  payment  obligations  under the  Exchange  Notes  will be
jointly and severally  guaranteed (the "Guarantees") by certain of the Company's
subsidiaries  (the  "Subsidiary  Guarantors").  Each  Subsidiary  Guarantor will
unconditionally  guarantee,  on a senior basis,  jointly and severally,  to each


                                       63
<PAGE>

Holder of Exchange Notes and the Trustee, the full and prompt performance of the
Issuers'  obligations under the Indenture and the Exchange Notes,  including the
payment of principal of and interest on the Exchange  Notes.  The obligations of
each  Subsidiary  Guarantor  under its  Guarantee  will be a  general  unsecured
obligation of such Subsidiary Guarantor,  ranking pari passu in right of payment
with all other current or future senior borrowings of such Subsidiary Guarantor,
including borrowings under the Credit Facility,  and senior in rights of payment
to any subordinated  indebtedness  incurred by such Subsidiary  Guarantor in the
future. The Guarantees will be effectively subordinated, however, to all current
and  future  secured  obligations  of  the  Subsidiary   Guarantors,   including
borrowings under the Credit  Facility,  to the extent of the value of the assets
securing such indebtedness. The obligations of each Subsidiary Guarantor will be
limited to the maximum amount which, after giving effect to all other contingent
and fixed  liabilities of such  Subsidiary  Guarantor and after giving effect to
any  collections  from or payments made by or on behalf of any other  Subsidiary
Guarantor in respect of the obligations of such other Subsidiary Guarantor under
its Guarantee or pursuant to its contribution  obligations  under the Indenture,
will result in the obligations of such Subsidiary  Guarantor under its Guarantee
not constituting a fraudulent conveyance or fraudulent transfer under Federal or
state law. Each Subsidiary  Guarantor that makes a payment or distribution under
its Guarantee  shall be entitled to a  contribution  from each other  Subsidiary
Guarantor  in an amount  pro rata,  based on the net  assets of each  Subsidiary
Guarantor, determined in accordance with GAAP.

        Each Subsidiary Guarantor may consolidate with or merge into or sell its
assets to the Company or another  Subsidiary  Guarantor  that is a Wholly  Owned
Restricted  Subsidiary without limitation,  or with or to other Persons upon the
terms and conditions set forth in the  Indenture.  See "-- Certain  Covenants --
Merger, Consolidation and Sale of Assets." In the event all of the Capital Stock
of a  Subsidiary  Guarantor  is sold by the  Company  and/or  one or more of its
Restricted  Subsidiaries  and the sale complies with the provisions set forth in
"-- Certain Covenants -- Limitation on Asset Sales," such Subsidiary Guarantor's
Guarantee will be released.

Redemption

    Optional Redemption

        The Series B Notes and Series C Notes are, and the  Exchange  Notes will
be,  redeemable,  at the Issuers'  option,  in whole at any time or in part from
time to time, on and after November 1, 2000, upon not less than 30 nor more than
60 days' notice, at the following redemption prices (expressed as percentages of
the  principal  amount  thereof)  if  redeemed  during the  twelve-month  period
commencing  on  November  1 of the years set forth  below,  plus,  in each case,
accrued and unpaid interest, if any, thereon to the date of redemption:

Year                                                       Percentage
- ----                                                       ----------
2000....................................................    105.750%
2001....................................................    102.875%
2002 and thereafter.....................................    100.000%

    Optional Redemption upon Equity Offerings

        At any time, or from time to time, on or prior to November 1, 1999,  the
Issuers may, at their  option,  use all or a portion of the net cash proceeds of
one or more  Equity  Offerings  (as  defined  below)  to redeem up to 35% of the
aggregate  original principal amount of the Exchange Notes at a redemption price
equal to 111.5% of the aggregate  principal  amount of the Exchange  Notes to be
redeemed,  plus accrued and unpaid  interest  and  liquidated  damages,  if any,
thereon to the date of redemption;  provided,  however, that at least 65% of the
aggregate  original  principal  amount of the Series C Notes and Exchange  Notes
remains  outstanding  immediately after giving effect to any such redemption (it
being expressly  agreed that for purposes of determining  whether this condition
is satisfied,  Exchange Notes owned by either Issuer or any of their  Affiliates
shall  be  deemed  not to be  outstanding).  In order to  effect  the  foregoing
redemption with the proceeds of any Equity Offering, the Issuers shall make such
redemption  not more than 60 days  after  the  consummation  of any such  Equity
Offering.

                                       64
<PAGE>

Selection and Notice of Redemption

        In the event that less than all of the Exchange Notes are to be redeemed
at any  time,  selection  of such  Exchange  Notes,  or  portions  thereof,  for
redemption  will be made by the Trustee in compliance  with the  requirements of
the principal national securities exchange,  if any, on which the Exchange Notes
are  listed  or,  if the  Exchange  Notes  are not  then  listed  on a  national
securities exchange,  on a pro rata basis, by lot or by such other method as the
Trustee shall deem fair and  appropriate;  provided,  however,  that no Exchange
Notes of a principal  amount of $1,000 or less shall be  redeemed  in part;  and
provided,  further, that if a partial redemption is made with the proceeds of an
Equity  Offering,  selection  of the  Exchange  Notes or  portions  thereof  for
redemption shall be made by the Trustee only on a pro rata basis or on as nearly
a pro rata basis as is practicable  (subject to the  procedures of DTC),  unless
such method is otherwise  prohibited.  Notice of  redemption  shall be mailed by
first-class  mail at least 30 but not more than 60 days  before  the  redemption
date to each Holder of Exchange Notes to be redeemed at its registered  address.
If any Exchange  Note is to be redeemed in part only,  the notice of  redemption
that  relates to such  Exchange  Note shall state the  portion of the  principal
amount thereof to be redeemed.  A new Exchange Note in a principal  amount equal
to the  unredeemed  portion  thereof  will be issued  in the name of the  Holder
thereof  upon  cancellation  of the  original  Exchange  Note.  On and after the
applicable  redemption date,  interest will cease to accrue on Exchange Notes or
portions  thereof  called for  redemption as long as the Issuers have  deposited
with the  paying  agent for the  Exchange  Notes  funds in  satisfaction  of the
applicable redemption price pursuant to the Indenture.

Change of Control

        The Indenture  provides that upon the occurrence of a Change of Control,
each  Holder of Exchange  Notes will have the right to require  that the Issuers
purchase all or a portion of such Holder's  Exchange Notes pursuant to the offer
described  below (the "Change of Control  Offer"),  at a purchase price equal to
101% of the principal amount thereof,  plus accrued and unpaid interest, if any,
thereon to the date of purchase.

        Within 30 days  following  the date upon  which  the  Change of  Control
occurred,  the Issuers must send,  by first class mail, a notice to each Holder,
with a copy to the Trustee, which notice shall govern the terms of the Change of
Control Offer. Such notice shall state,  among other things,  the purchase date,
which must be no earlier  than 30 days nor later than 45 days from the date such
notice is mailed,  other than as may be required by law (the  "Change of Control
Payment  Date").  A Change of Control Offer shall remain open for a period of 20
Business  Days or such  longer  period as may be  required  by law.  Holders  of
Exchange Notes electing to have an Exchange Note purchased  pursuant to a Change
of Control Offer will be required to surrender the Exchange Note,  with the form
entitled  "Option of Holder to Elect  Purchase"  on the reverse of the  Exchange
Note  completed,  to the  paying  agent for the  Exchange  Notes at the  address
specified in the notice prior to the close of business on the third Business Day
prior to the Change of Control Payment Date.

        The Issuers shall not be required to make a Change of Control Offer upon
a Change of Control if a third  party  makes the Change of Control  Offer at the
Change of Control  Purchase Price, at the same times and otherwise in compliance
with the  requirements  applicable  to a Change  of  Control  Offer  made by the
Issuers and purchases all Notes  validly  tendered and not withdrawn  under such
Change of Control Offer.

        If a Change of Control Offer is made, there can be no assurance that the
Issuers  will have  available  funds  sufficient  to pay the  Change of  Control
purchase  price for all the  Exchange  Notes that might be  delivered by Holders
seeking  to accept the Change of Control  Offer.  In the event the  Issuers  are
required to purchase  outstanding Exchange Notes pursuant to a Change of Control
Offer,  the Issuers  expect that they would seek third  party  financing  to the
extent  they do not have  available  funds to meet their  purchase  obligations.
However, there can be no assurance that the Issuers would be able to obtain such
financing.

        Neither the Board of  Directors of either of the Issuers nor the Trustee
may waive the covenant  relating to the Issuers'  obligation to make a Change of
Control Offer.  Restrictions in the Indenture described herein on the ability of
the Company and its Restricted Subsidiaries to incur additional Indebtedness, to


                                       65
<PAGE>

grant liens on their  property,  to make  Restricted  Payments and to make Asset
Sales may also make more  difficult  or  discourage  a takeover of the  Company,
whether favored or opposed by the management of the Company. Consummation of any
such transaction in certain  circumstances may require  repurchase of the Notes,
and there can be no assurance that the Company or the acquiring  party will have
sufficient financial resources to effect such repurchase.  Such restrictions and
the restrictions on transactions with Affiliates may, in certain  circumstances,
make more  difficult or discourage  any  leveraged  buyout of the Company by the
management  of the  Issuers.  While such  restrictions  cover a wide  variety of
arrangements  which  have  traditionally  been used to effect  highly  leveraged
transactions,  the  Indenture  may not afford  the  Holders  of  Exchange  Notes
protection in all  circumstances  from the adverse aspects of a highly leveraged
transaction, reorganization, restructuring, merger or similar transaction.

        The Issuers  will comply with the  requirements  of Rule 14e-1 under the
Exchange Act and any other  securities  laws and  regulations  thereunder to the
extent  such  laws  and  regulations  are  applicable  in  connection  with  the
repurchase of Notes  pursuant to a Change of Control  Offer.  To the extent that
the provisions of any securities  laws or regulations  conflict with the "Change
of Control"  provisions  of the  Indenture,  the Issuers  shall  comply with the
applicable  securities  laws and  regulations  and  shall  not be deemed to have
breached  their  obligations  under the  "Change of Control"  provisions  of the
Indenture by virtue thereof.

Certain Covenants

        The Indenture contain, among others, the following covenants:

        Limitation  on  Incurrence  of  Additional   Indebtedness.   Other  than
Permitted Indebtedness,  the Company may not, and may not cause or permit any of
its Restricted  Subsidiaries to, directly or indirectly,  create, incur, assume,
guarantee,  acquire, become liable,  contingently or otherwise, with respect to,
or  otherwise  become  responsible  for payment of  (collectively,  "incur") any
Indebtedness;  provided,  however,  that if no Default or Event of Default shall
have  occurred  and be  continuing  at the  time of or as a  consequence  of the
incurrence of any such Indebtedness, the Company and the Restricted Subsidiaries
or any of them may incur Indebtedness (including,  without limitation,  Acquired
Indebtedness),  in  each  case,  if on  the  date  of  the  incurrence  of  such
Indebtedness,  after giving pro forma effect to the  incurrence  thereof and the
receipt and  application of the proceeds  therefrom,  (i) both (a) the Company's
Consolidated  EBITDA Coverage Ratio would have been at least equal to 2.5 to 1.0
and (b) the Company's Adjusted  Consolidated Net Tangible Assets are equal to or
greater than 150% of the aggregate consolidated  Indebtedness of the Company and
its Restricted  Subsidiaries  or (ii) the Company's  Adjusted  Consolidated  Net
Tangible Assets are equal to or greater than 200% of the aggregate  consolidated
Indebtedness of the Company and its Restricted Subsidiaries.

        For purposes of determining any particular amount of Indebtedness  under
this   covenant,   guarantees  of   Indebtedness   otherwise   included  in  the
determination of such amount shall not also be included.

        Indebtedness  of a Person  existing  at the time such  Person  becomes a
Restricted Subsidiary (whether by merger, consolidation,  acquisition of Capital
Stock or  otherwise)  or is merged  with or into the  Company or any  Restricted
Subsidiary or which is secured by a Lien on an asset  acquired by the Company or
a  Restricted  Subsidiary  (whether or not such  Indebtedness  is assumed by the
acquiring  Person)  shall be deemed  incurred  at the time the Person  becomes a
Restricted  Subsidiary or at the time of the asset acquisition,  as the case may
be.

        The Company  will not, and will not permit any  Subsidiary  Guarantor to
incur any  Indebtedness  which by its  terms  (or by the terms of any  agreement
governing such  Indebtedness)  is  subordinated in right of payment to any other
Indebtedness   of  the  Company  or  such  Subsidiary   Guarantor   unless  such
Indebtedness  is also by its terms (or by the terms of any  agreement  governing
such Indebtedness)  made expressly  subordinate in right of payment to the Notes
or the Guarantee of such Subsidiary  Guarantor,  as the case may be, pursuant to
subordination  provisions that are substantively  identical to the subordination
provisions of such  Indebtedness  (or such agreement) that are most favorable to
the  holders  of any  other  Indebtedness  of the  Company  or  such  Subsidiary
Guarantor, as the case may be.

        Limitation  on Restricted  Payments.  The Company will not, and will not
cause or permit any of its Restricted  Subsidiaries  to, directly or indirectly,


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(a) declare or pay any dividend or make any  distribution  (other than dividends
or distributions payable solely in Qualified Capital Stock of the Company) on or
in respect of shares of the  Company's  Capital Stock to holders of such Capital
Stock, (b) purchase, redeem or otherwise acquire or retire for value any Capital
Stock of the Company or any  warrants,  rights or options to purchase or acquire
shares of any class of such  Capital  Stock  other  than  through  the  exchange
therefor solely of Qualified Capital Stock of the Company or warrants, rights or
options to purchase or acquire shares of Qualified Capital Stock of the Company,
(c) make any principal payment on, purchase,  defease,  redeem, prepay, decrease
or otherwise acquire or retire for value, prior to any scheduled final maturity,
scheduled  repayment or scheduled sinking fund payment,  any Indebtedness of the
Company or a  Subsidiary  Guarantor  that is  subordinate  or junior in right of
payment to the Notes or such Subsidiary Guarantor's  Guarantee,  as the case may
be, or (d) make any Investment (other than a Permitted  Investment) (each of the
foregoing  actions set forth in clauses (a), (b), (c) and (d) being  referred to
as a  "Restricted  Payment"),  if at the  time of  such  Restricted  Payment  or
immediately  after giving effect  thereto,  (i) a Default or an Event of Default
shall have  occurred and be  continuing or (ii) the Company is not able to incur
at least $1.00 of additional Indebtedness (other than Permitted Indebtedness) in
compliance with "-- Limitation on Incurrence of Additional  Indebtedness" above;
provided,  however,  that notwithstanding the provisions of clause (i)(a) of "--
Limitation  on Incurrence of  Additional  Indebtedness"  above,  for purposes of
determining  whether  the  Company  could  incur  such  additional  Indebtedness
pursuant to this clause (ii), the Consolidated EBITDA Coverage Ratio which shall
be  required  shall be at least  2.5 to 1.0,  or (iii) the  aggregate  amount of
Restricted Payments (including such proposed Restricted Payment) made subsequent
to the Series A/B Issue Date (the amount  expended for such  purposes,  if other
than in  cash,  being  the fair  market  value of such  property  as  determined
reasonably  and in good faith by the Board of Directors  of the  Company)  shall
exceed  the sum of:  (A) 50% of the  cumulative  Consolidated  Net Income (or if
cumulative  Consolidated Net Income shall be a loss, minus 100% of such loss) of
the Company  earned  subsequent  to the Series A/B Issue Date and on or prior to
the  last  date of the  Company's  fiscal  quarter  immediately  preceding  such
Restricted  Payment (the  "Reference  Date")  (treating  such period as a single
accounting period); plus (B) 100% of the aggregate net cash proceeds received by
the Company from any Person (other than a Restricted  Subsidiary of the Company)
from the  issuance  and sale  subsequent  to the Series A/B Issue Date and on or
prior to the Reference Date of Qualified Capital Stock of the Company;  plus (C)
without  duplication of any amounts  included in clause (iii)(B) above,  100% of
the  aggregate  net cash  proceeds  of any equity  contribution  received by the
Company from a holder of the Company's Capital Stock (excluding,  in the case of
clauses  (iii)(B) and (C), any net cash proceeds from an Equity  Offering to the
extent used to redeem the Notes);  plus (D) an amount equal to the net reduction
in Investments in Unrestricted  Subsidiaries resulting from dividends,  interest
payments,  repayments of loans or advances,  or other transfers of cash, in each
case  to the  Company  or to any  Restricted  Subsidiary  of  the  Company  from
Unrestricted  Subsidiaries (but without  duplication of any such amount included
in  calculating  cumulative  Consolidated  Net Income of the  Company),  or from
redesignations of Unrestricted  Subsidiaries as Restricted Subsidiaries (in each
case  valued as  provided  in "--  Limitation  on  Designation  of  Unrestricted
Subsidiaries" below), not to exceed, in the case of any Unrestricted Subsidiary,
the amount of  Investments  previously  made by the  Company  or any  Restricted
Subsidiary in such Unrestricted Subsidiary and which was treated as a Restricted
Payment under the Indenture;  plus (E) without  duplication  of the  immediately
preceding  subclause  (D), an amount equal to the lesser of the cost or net cash
proceeds  received upon the sale or other  disposition  of any  Investment  made
after the Series A/B Issue Date which had been treated as a  Restricted  Payment
(but without  duplication of any such amount included in calculating  cumulative
Consolidated Net Income of the Company); plus (F) $5,000,000.

        Notwithstanding   the  foregoing,   the  provisions  set  forth  in  the
immediately  preceding  paragraph  shall not  prohibit:  (1) the  payment of any
dividend or redemption  payment  within 60 days after the date of declaration of
such  dividend  or the  applicable  redemption  if the  dividend  or  redemption
payment,  as the  case  may  be,  would  have  been  permitted  on the  date  of
declaration;  (2) if no Default or Event of Default  shall have  occurred and be
continuing,  the  acquisition  of any  shares of Capital  Stock of the  Company,
either  (A) solely in  exchange  for shares of  Qualified  Capital  Stock of the
Company or (B)  through  the  application  of net  proceeds  of a  substantially
concurrent sale for cash (other than to a Restricted  Subsidiary of the Company)
of shares of Qualified Capital Stock of the Company;  (3) if no Default or Event
of  Default  shall have  occurred  and be  continuing,  the  acquisition  of any
Indebtedness  of the Company or  Subsidiary  Guarantor  that is  subordinate  or
junior  in  right  of  payment  to the  Notes  or  such  Subsidiary  Guarantor's
Guarantee,  as the case may be,  either  (A)  solely in  exchange  for shares of
Qualified  Capital Stock of the Company,  or (B) through the  application of net

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<PAGE>
proceeds of a substantially concurrent sale for cash (other than to a Restricted
Subsidiary  of the  Company)  of (I) shares of  Qualified  Capital  Stock of the
Company or (II)  Refinancing  Indebtedness;  and (4) the initial  designation of
Cascade and Western Associated Energy  Corporation as Unrestricted  Subsidiaries
under the Indenture.  In determining the aggregate amount of Restricted Payments
made  subsequent to the Series A/B Issue Date in accordance with clause (iii) of
the immediately  preceding  paragraph,  amounts expended pursuant to clauses (1)
and (2)(B) shall be included in such calculation.

        Limitation  on Asset  Sales.  The Company may not,  and may not cause or
permit any of its Restricted  Subsidiaries  to,  consummate an Asset Sale unless
(a) the Company or the  applicable  Restricted  Subsidiary,  as the case may be,
receives consideration at the time of such Asset Sale at least equal to the fair
market value of the assets sold or otherwise  disposed of (as determined in good
faith by the Company's Board of Directors or senior  management of the Company);
(b) (i) at  least  70% of the  consideration  received  by the  Company  or such
Restricted Subsidiary,  as the case may be, from such Asset Sale shall be in the
form of cash or Cash Equivalents and is received at the time of such disposition
and (ii) at least 15% of such  consideration  received  if in a form  other than
cash  or Cash  Equivalents  is  converted  into or  exchanged  for  cash or Cash
Equivalents  within 120 days of such disposition;  and (c) upon the consummation
of an Asset Sale, the Company shall apply, or cause such  Restricted  Subsidiary
to apply,  the Net Cash Proceeds  relating to such Asset Sale within 365 days of
receipt thereof either (i) to repay or prepay Indebtedness outstanding under the
Credit Facility,  including,  without  limitation,  a permanent reduction in the
related commitment, (ii) to repay or prepay any Indebtedness of the Company that
is secured by a Lien  permitted  to be incurred  pursuant to "--  Limitation  on
Liens"  below,  (iii) to make an investment in properties or assets that replace
the  properties  or  assets  that  were the  subject  of such  Asset  Sale or in
properties  or assets  that will be used in the  business of the Company and its
Restricted  Subsidiaries  as  existing  on  the  Series  A/B  Issue  Date  or in
businesses  reasonably  related  thereto  ("Replacement  Assets"),  (iv)  to  an
investment in Crude Oil and Natural Gas Related  Assets or (v) a combination  of
prepayment  and  investment  permitted by the foregoing  clauses  (c)(i) through
(c)(iv).  On the 366th day after an Asset Sale or such earlier  date, if any, as
the  Board of  Directors  of the  Company  determines  not to apply the Net Cash
Proceeds  relating  to such Asset Sale as set forth in  clauses  (c)(i)  through
(c)(iv) of the next  preceding  sentence  (each a "Net  Proceeds  Offer  Trigger
Date"),  such aggregate  amount of Net Cash Proceeds which have been received by
the Company or such Restricted Subsidiary, but which have not been applied on or
before such Net Proceeds  Offer  Trigger  Date as  permitted  in clauses  (c)(i)
through (c)(iv) of the next preceding sentence (each an "Unadjusted Net Proceeds
Offer  Amount"),  multiplied  by the ratio (the "Net Proceeds  Offer  Adjustment
Ratio") of the then outstanding  principal amount of the Notes to the sum of the
then  outstanding  principal  amount  of  the  Series  B  Notes  plus  the  then
outstanding  principal  amount of the Notes (each a "Net Proceeds Offer Amount")
shall be applied by the Company or such Restricted  Subsidiary,  as the case may
be, to make an offer to  purchase (a "Net  Proceeds  Offer") on a date (the "Net
Proceeds  Offer Payment  Date") not less than 30 nor more than 45 days following
the applicable  Net Proceeds Offer Trigger Date,  from all Holders on a pro rata
basis,  that principal  amount of Notes  purchasable with the Net Proceeds Offer
Amount  at a price  equal to 100% of the  principal  amount  of the  Notes to be
purchased,  plus  accrued and unpaid  interest,  if any,  thereon to the date of
purchase;  provided,  however,  that if at any time any  non-cash  consideration
received by the  Company or any  Restricted  Subsidiary,  as the case may be, in
connection  with any Asset Sale is converted into or sold or otherwise  disposed
of for cash (other than  interest  received  with  respect to any such  non-cash
consideration),   then  such  conversion  or  disposition  shall  be  deemed  to
constitute an Asset Sale  hereunder  and the Net Cash Proceeds  thereof shall be
applied in accordance with this covenant. The Company may defer the Net Proceeds
Offer until the sum of the  Unadjusted Net Proceeds Offer Amounts that correlate
to the unutilized  Net Proceeds  Offer Amounts  resulting from one or more Asset
Sales is equal  to or in  excess  of  $5,000,000  (at  which  time,  the  entire
unutilized Net Proceeds Offer Amounts  (recalculated  using the then current Net
Proceeds Offer  Adjustment  Ratio),  and not just the Net Proceeds Offer Amounts
correlating   to  the  Unadjusted  Net  Proceeds  Offer  Amounts  in  excess  of
$5,000,000, shall be applied as required pursuant to this paragraph).

        In the event of the transfer of  substantially  all (but not all) of the
property  and  assets  of the  Company  and its  Restricted  Subsidiaries  as an
entirety to a Person in a transaction permitted under "-- Merger,  Consolidation
and Sale of Assets," the successor  corporation shall be deemed to have sold the
properties  and assets of the Company  and its  Restricted  Subsidiaries  not so
transferred for purposes of this covenant,  and shall comply with the provisions
of this  covenant  with respect to such deemed sale as if it were an Asset Sale.
In addition,  the fair market value of such properties and assets of the Company
or its Restricted  Subsidiaries deemed to be sold shall be deemed to be Net Cash
Proceeds for purposes of this covenant.

                                       68
<PAGE>
        Notwithstanding the two immediately  preceding  paragraphs,  the Company
and its  Restricted  Subsidiaries  will be permitted to consummate an Asset Sale
without  complying with such paragraphs to the extent (a) the  consideration for
such Asset Sale constitutes  Replacement Assets and/or Crude Oil and Natural Gas
Related  Assets  and (b) such  Asset Sale is for fair  market  value;  provided,
however,  that any consideration not constituting  Replacement  Assets and Crude
Oil and  Natural  Gas  Related  Assets  received  by the  Company  or any of its
Restricted  Subsidiaries  in  connection  with any Asset  Sale  permitted  to be
consummated  under this paragraph shall  constitute Net Cash Proceeds subject to
the provisions of the two immediately preceding paragraphs.

        Notice of each Net Proceeds  Offer will be mailed to the record  Holders
as shown on the register of Holders  within 30 days  following  the Net Proceeds
Offer  Trigger  Date,  with a copy to the  Trustee,  and shall  comply  with the
procedures set forth in the Indenture. Upon receiving notice of the Net Proceeds
Offer,  Holders of Exchange  Notes may elect to tender their  Exchange  Notes in
whole or in part in integral  multiples of $1,000 in exchange  for cash.  To the
extent  Holders  properly  tender  Notes  with  an  aggregate  principal  amount
exceeding  the Net Proceeds  Offer  Amount,  Notes of tendering  Holders will be
purchased  on a pro rata basis  (based on  principal  amounts  tendered).  A Net
Proceeds Offer shall remain open for a period of 20 Business Days or such longer
period as may be required by law.

        The  Company's  ability to repurchase  Exchange  Notes in a Net Proceeds
Offer is restricted by the terms of the Credit Facility and may be prohibited or
otherwise limited by the terms of any then existing  borrowing  arrangements and
by the Company's financial resources.

        The Company  will comply with the  requirements  of Rule 14e-1 under the
Exchange Act and any other  securities  laws and  regulations  thereunder to the
extent  such  laws  and  regulations  are  applicable  in  connection  with  the
repurchase of Exchange  Notes  pursuant to a Net Proceeds  Offer.  To the extent
that the  provisions of any  securities  laws or  regulations  conflict with the
"Asset Sale"  provisions  of the  Indenture,  the Company  shall comply with the
applicable  securities  laws and  regulations  and  shall  not be deemed to have
breached its obligations  under the "Asset Sale"  provisions of the Indenture by
virtue thereof.

        Limitation  on  Dividend  and  Other  Payment   Restrictions   Affecting
Restricted Subsidiaries. The Company may not, and may not cause or permit any of
its Restricted  Subsidiaries  to,  directly or  indirectly,  create or otherwise
cause or permit to exist or become  effective any  encumbrance or restriction on
the ability of any Restricted  Subsidiary to (a) pay dividends or make any other
distributions on or in respect of its Capital Stock; (b) make loans or advances,
or to pay any Indebtedness or other obligation owed, to the Company or any other
Restricted Subsidiary; (c) guarantee any Indebtedness or any other obligation of
the Company or any Restricted Subsidiary; or (d) transfer any of its property or
assets to the Company or any other Restricted  Subsidiary (each such encumbrance
or  restriction,  a  "Payment  Restriction"),  except for such  encumbrances  or
restrictions  existing  under or by reason  of:  (i)  applicable  law;  (ii) the
Indenture  and the  Series  A/B  Indenture;  (iii)  the  Credit  Facility;  (iv)
customary  non-assignment  provisions  of any contract or any lease  governing a
leasehold interest of any Restricted  Subsidiary;  (v) any instrument  governing
Acquired  Indebtedness,  which  encumbrance  or restriction is not applicable to
such  Restricted  Subsidiary,  or the  properties  or assets of such  Restricted
Subsidiary,  other than the Person or the  properties or assets of the Person so
acquired;  (vi)  agreements  existing on the Series A/B Issue Date to the extent
and in the manner such  agreements  were in effect on the Series A/B Issue Date;
(vii)  customary  restrictions  with respect to a Restricted  Subsidiary  of the
Company  pursuant to an  agreement  that has been  entered  into for the sale or
disposition  of  Capital  Stock or assets of such  Restricted  Subsidiary  to be
consummated in accordance  with the terms of the Indenture  solely in respect of
the assets or Capital  Stock to be sold or disposed  of;  (viii) any  instrument
governing a Permitted Lien, to the extent and only to the extent such instrument
restricts the transfer or other  disposition of assets subject to such Permitted
Lien;  or (ix) an  agreement  governing  Refinancing  Indebtedness  incurred  to
Refinance the Indebtedness issued,  assumed or incurred pursuant to an agreement
referred to in clause (ii), (iii), (v) or (vi) above;  provided,  however,  that
the provisions relating to such encumbrance or restriction contained in any such
Refinancing  Indebtedness  are no less  favorable to the Holders in any material
respect  as  determined  by the  Board  of  Directors  of the  Company  in their
reasonable  and  good  faith  judgment  than  the  provisions  relating  to such
encumbrance or restriction  contained in the applicable agreement referred to in
such clause (ii), (iii), (v) or (vi).

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<PAGE>

        Limitation on Preferred  Stock of Restricted  Subsidiaries.  The Company
will  not  cause or  permit  any of its  Restricted  Subsidiaries  to issue  any
Preferred  Stock  (other  than to the  Company or to a Wholly  Owned  Restricted
Subsidiary)  or permit  any Person  (other  than the  Company or a Wholly  Owned
Restricted Subsidiary) to own any Preferred Stock of any Restricted Subsidiary.

        Limitation on Liens.  Other than Permitted  Liens,  the Company may not,
and may not cause or permit any of its Restricted  Subsidiaries  to, directly or
indirectly,  create, incur, assume or permit or suffer to exist any Liens of any
kind  against  or upon any  property  or  assets  of the  Company  or any of its
Restricted  Subsidiaries  (whether owned on the Issue Date or acquired after the
Issue Date) or any proceeds  therefrom,  or assign or otherwise convey any right
to receive income or profits  therefrom unless (a) in the case of Liens securing
Indebtedness that is expressly  subordinate or junior in right of payment to the
Exchange Notes or any Guarantee,  the Exchange Notes or such  Guarantee,  as the
case may be, are secured by a Lien on such property,  assets or proceeds that is
senior in  priority  to such Liens at least to the same  extent as the  Exchange
Notes are senior in priority to such  Indebtedness  and (b) in all other  cases,
the Exchange Notes and the Guarantees are equally and ratably secured.

        Merger,  Consolidation  and Sale of Assets.  The  Company  may not, in a
single transaction or series of related transactions,  consolidate or merge with
or into any  Person,  or sell,  assign,  transfer,  lease,  convey or  otherwise
dispose  of (or cause or  permit  any  Restricted  Subsidiary  to sell,  assign,
transfer, lease, convey or otherwise dispose of) all or substantially all of the
Company's  assets  (determined on a  consolidated  basis for the Company and its
Restricted Subsidiaries), whether as an entirety or substantially as an entirety
to any Person unless: (a) either (i) the Company or such Restricted  Subsidiary,
as the case may be, shall be the surviving or continuing corporation or (ii) the
Person (if other than the Company)  formed by such  consolidation  or into which
the  Company  is  merged  or the  Person  which  acquires  by sale,  assignment,
transfer,  lease,  conveyance or other  disposition the properties and assets of
the Company and its Restricted  Subsidiaries  substantially  as an entirety (the
"Surviving  Entity") (x) shall be a corporation  organized and validly  existing
under the laws of the  United  States or any state  thereof or the  District  of
Columbia and (y) shall expressly assume, by supplemental  indenture (in form and
substance  satisfactory to the Trustee),  executed and delivered to the Trustee,
the due and punctual payment of the principal of, premium,  if any, and interest
on all of the  Exchange  Notes  and the  performance  of every  covenant  of the
Exchange Notes, the Indenture and the Registration  Rights Agreement on the part
of the Company to be performed or observed;  (b) immediately after giving effect
to such transaction and the assumption  contemplated by clause  (a)(ii)(y) above
(including  giving  effect to any  Indebtedness  incurred or  anticipated  to be
incurred in connection with or in respect of such  transaction),  the Company or
such Surviving  Entity,  as the case may be, (i) shall have a  Consolidated  Net
Worth  equal  to or  greater  than the  Consolidated  Net  Worth of the  Company
immediately  prior to such  transaction and (ii) shall be able to incur at least
$1.00 of additional Indebtedness (other than Permitted Indebtedness) pursuant to
"-- Limitation on Incurrence of Additional  Indebtedness" above; (c) immediately
before  and  immediately  after  giving  effect  to  such  transaction  and  the
assumption   contemplated  by  clause  (a)(ii)(y)  above   (including,   without
limitation,  giving effect to any  Indebtedness  incurred or  anticipated  to be
incurred  and  any  Lien  granted  in  connection  with  or in  respect  of  the
transaction),  no  Default  or  Event  of  Default  shall  have  occurred  or be
continuing;  and (d) the Company or the  Surviving  Entity,  as the case may be,
shall have delivered to the Trustee an officers'  certificate  and an opinion of
counsel,  each  stating  that  such  consolidation,  merger,  sale,  assignment,
transfer,  lease,  conveyance  or  other  disposition  and,  if  a  supplemental
indenture is required in connection  with such  transaction,  such  supplemental
indenture  comply with the  applicable  provisions of the Indenture and that all
conditions  precedent in the Indenture  relating to such  transaction  have been
satisfied; provided, however, that such counsel may rely, as to matters of fact,
on a certificate or certificates of officers of the Company.

        For purposes of the foregoing, the transfer (by lease, assignment,  sale
or  otherwise,  in a single  transaction  or series of  transactions)  of all or
substantially  all of the  properties  or  assets  of  one  or  more  Restricted
Subsidiaries the Capital Stock of which  constitutes all or substantially all of
the properties and assets of the Company,  shall be deemed to be the transfer of
all or substantially all of the properties and assets of the Company.

        Upon any consolidation,  combination or merger or any transfer of all or
substantially all of the assets of the Company in accordance with the foregoing,


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<PAGE>

in which the Company is not the  continuing  corporation,  the successor  Person
formed by such  consolidation  or into  which the  Company is merged or to which
such conveyance,  lease or transfer is made shall succeed to, and be substituted
for, and may exercise  every right and power of, the Company under the Indenture
and the Exchange Notes with the same effect as if such surviving entity had been
named as such.

        Each  Subsidiary  Guarantor  (other than any Subsidiary  Guarantor whose
Guarantee is to be released in  accordance  with the terms of the  Guarantee and
the Indenture in connection with any  transaction  complying with the provisions
of the Indenture described under "Merger, Consolidation and Sale of Assets") may
not,  and the  Company  may not cause or permit  any  Subsidiary  Guarantor  to,
consolidate  with or merge  with or into any Person  other  than the  Company or
another  Subsidiary  Guarantor  that is a  Wholly  Owned  Restricted  Subsidiary
unless:  (a) the entity formed by or surviving any such  consolidation or merger
(if  other  than  the  Subsidiary  Guarantor)  or to  which  such  sale,  lease,
conveyance or other disposition shall have been made is a corporation  organized
and  existing  under the laws of the United  States or any state  thereof or the
District of Columbia;  (b) such entity  assumes by  execution of a  supplemental
indenture  all  of  the  obligations  of  the  Subsidiary  Guarantor  under  its
Guarantee;  (c) immediately after giving effect to such transaction,  no Default
or Event of Default shall have occurred and be continuing;  and (d)  immediately
after  giving  effect  to such  transaction  and  the  use of any  net  proceeds
therefrom on a pro forma basis,  the Company  could  satisfy the  provisions  of
clause (b) of the first paragraph of this covenant.  Any merger or consolidation
of a Subsidiary  Guarantor with and into the Company (with the Company being the
surviving  entity)  or  another  Subsidiary  Guarantor  that is a  Wholly  Owned
Restricted Subsidiary need only comply with clause (d) of the first paragraph of
this covenant.

        Limitations on Transactions  with Affiliates.  (a) The Company will not,
and will not cause or permit any of its Restricted  Subsidiaries to, directly or
indirectly,  enter into,  amend or permit or suffer to exist any  transaction or
series of related  transactions  (including,  without limitation,  the purchase,
sale, lease or exchange of any property, the guaranteeing of any Indebtedness or
the  rendering  of any  service)  with,  or for the  benefit  of,  any of  their
respective  Affiliates  (each  an  "Affiliate  Transaction"),   other  than  (i)
Affiliate  Transactions  permitted under paragraph (b) of this covenant and (ii)
Affiliate  Transactions  that are on terms that are fair and  reasonable  to the
Company or the applicable Restricted Subsidiary and are no less favorable to the
Company or the applicable Restricted Subsidiary than those that might reasonably
have been obtained in a comparable  transaction at such time on an  arm's-length
basis from a Person that is not an Affiliate  of the Company or such  Restricted
Subsidiary.  All Affiliate  Transactions  (and each series of related  Affiliate
Transactions  which are similar or part of a common  plan)  involving  aggregate
payments  or other  property  with a fair market  value in excess of  $1,000,000
shall be approved by the Board of Directors of the Company,  such approval to be
evidenced  by a Board  Resolution  stating  that  such  Board of  Directors  has
determined that such transaction complies with the foregoing provisions.  If the
Company or any Restricted  Subsidiary enters into an Affiliate Transaction (or a
series of related Affiliate Transactions related to a common plan) that involves
an aggregate  fair market  value of more than  $10,000,000,  the Company  shall,
prior to the consummation thereof, obtain a favorable opinion as to the fairness
of such  transaction  or series of related  transactions  to the  Company or the
relevant  Restricted  Subsidiary,  as the case may be, from a financial point of
view, from an Independent Advisor and file the same with the Trustee.

        (b) The  restrictions  set  forth in  clause  (a) shall not apply to (i)
reasonable fees and  compensation  paid to and indemnity  provided on behalf of,
officers,  directors,  employees or consultants of the Company or any Restricted
Subsidiary  as  determined  in good  faith by the Board of  Directors  or senior
management  of the Company or such  Restricted  Subsidiary,  as the case may be;
(ii)  transactions  exclusively  between  or among  the  Company  and any of its
Restricted   Subsidiaries  or  exclusively  between  or  among  such  Restricted
Subsidiaries;  provided,  however,  that  such  transactions  are not  otherwise
prohibited by the  Indenture;  and (iii)  Restricted  Payments  permitted by the
Indenture.

        Limitation on Restricted and  Unrestricted  Subsidiaries.  The Indenture
provides  that the Board of  Directors  may,  if no  Default or Event of Default
shall have  occurred and be continuing  or would arise  therefrom,  designate an
Unrestricted Subsidiary to be a Restricted Subsidiary;  provided,  however, that
(i) any such redesignation shall be deemed to be an incurrence as of the date of
such  redesignation  by the  Company  and  its  Restricted  Subsidiaries  of the
Indebtedness  (if  any)  of  such   redesignated   Subsidiary  for  purposes  of
"--Limitation on Incurrence of Additional  Indebtedness" above, (ii) unless such


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redesignated Subsidiary shall not have any Indebtedness outstanding,  other than
Indebtedness which would be Permitted Indebtedness, no such designation shall be
permitted if  immediately  after  giving  effect to such  redesignation  and the
incurrence of any such additional Indebtedness the Company could not incur $1.00
of additional  Indebtedness (other than Permitted  Indebtedness) pursuant to "--
Limitation  on  Incurrence  of  Additional  Indebtedness"  above and (iii)  such
Subsidiary  assumes  by  execution  of  a  supplemental  indenture  all  of  the
obligations of a Subsidiary Guarantor under a Guarantee.

        The Board of  Directors  of the Company also may, if no Default or Event
of Default  shall have  occurred  and be  continuing  or would arise  therefrom,
designate any Restricted Subsidiary to be an Unrestricted Subsidiary if (i) such
designation  is at that  time  permitted  under  "--  Limitation  on  Restricted
Payments" above and (ii)  immediately  after giving effect to such  designation,
the Company could incur $1.00 of additional  Indebtedness  (other than Permitted
Indebtedness)   pursuant  to  "--   Limitation   on   Incurrence  of  Additional
Indebtedness"  above.  Any such  designation by the Board of Directors  shall be
evidenced  to the Trustee by the filing with the Trustee of a certified  copy of
the  resolution of the Board of Directors  giving effect to such  designation or
redesignation and an Officers'  Certificate  certifying that such designation or
redesignation  complied  with the  foregoing  conditions  and  setting  forth in
reasonable detail the underlying calculations.  In the event that any Restricted
Subsidiary  is  designated an  Unrestricted  Subsidiary in accordance  with this
covenant, such Restricted Subsidiary's Guarantee will be released.

        The Indenture provides that for purposes of the covenant described under
"--Limitation on Restricted Payments" above, (i) an "Investment" shall be deemed
to have been made at the time any  Restricted  Subsidiary  is  designated  as an
Unrestricted  Subsidiary in an amount  (proportionate  to the  Company's  equity
interest  in  such  Subsidiary)  equal  to the  net  worth  of  such  Restricted
Subsidiary  at the time that such  Restricted  Subsidiary  is  designated  as an
Unrestricted Subsidiary; (ii) at any date the aggregate amount of all Restricted
Payments made as  Investments  since the Series A/B Issue Date shall exclude and
be reduced by an amount  (proportionate to the Company's equity interest in such
Subsidiary)  equal to the net worth of any  Unrestricted  Subsidiary at the time
that such Unrestricted Subsidiary is designated a Restricted Subsidiary,  not to
exceed, in the case of any such redesignation of an Unrestricted Subsidiary as a
Restricted Subsidiary,  the amount of Investments previously made by the Company
and its Restricted  Subsidiaries in such  Unrestricted  Subsidiary (in each case
(i) and (ii) "net worth" to be  calculated  based upon the fair market  value of
the assets of such Subsidiary as of any such date of designation); and (iii) any
property  transferred to or from an Unrestricted  Subsidiary  shall be valued at
its fair market value at the time of such transfer.

        The Indenture provides that notwithstanding the foregoing,  the Board of
Directors may not designate any Subsidiary of the Company to be an  Unrestricted
Subsidiary  if,  after  such  designation,  (a) the  Company  or any  Restricted
Subsidiary (i) provides credit support for, or a guarantee of, any  Indebtedness
of  such  Subsidiary   (including  any  undertaking,   agreement  or  instrument
evidencing such  Indebtedness) or (ii) is directly or indirectly  liable for any
Indebtedness  of such  Subsidiary or (b) such  Subsidiary owns any Capital Stock
of, or owns or holds any Lien on any  property  of,  any  Restricted  Subsidiary
which is not a Subsidiary of the Subsidiary to be so designated.

        The  Indenture  provides that  Subsidiaries  of the Company that are not
designated by the Board of Directors as Restricted or Unrestricted  Subsidiaries
will be deemed to be Restricted Subsidiaries.  Notwithstanding any provisions of
this  covenant,   all  Subsidiaries  of  an  Unrestricted   Subsidiary  will  be
Unrestricted Subsidiaries.

        Additional  Subsidiary  Guarantees.   If  the  Company  or  any  of  its
Restricted   Subsidiaries  transfers  or  causes  to  be  transferred,   in  one
transaction or a series of related transactions,  any property to any Restricted
Subsidiary that is not a Subsidiary  Guarantor,  or if the Company or any of its
Restricted  Subsidiaries shall organize,  acquire or otherwise invest in or hold
an Investment in another Restricted  Subsidiary having total consolidated assets
with a book value in excess of $500,000 that is not a Subsidiary Guarantor, then
such transferee or acquired or other Restricted Subsidiary shall (a) execute and
deliver to the Trustee a supplemental indenture in form reasonably  satisfactory
to  the   Trustee   pursuant   to  which  such   Restricted   Subsidiary   shall
unconditionally  guarantee all of the Company's  obligations under the Notes and
the  Indenture  on the terms set forth in the  Indenture  and (b) deliver to the
Trustee an opinion of counsel  that such  supplemental  indenture  has been duly
authorized, executed and delivered by such Restricted Subsidiary and constitutes


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a  legal,  valid,   binding  and  enforceable   obligation  of  such  Restricted
Subsidiary.  Thereafter,  such  Restricted  Subsidiary  shall  be  a  Subsidiary
Guarantor for all purposes of the Indenture.

        Limitation  on Conduct of  Business.  The Company  may not,  and may not
permit  any of its  Restricted  Subsidiaries  to,  engage in the  conduct of any
business other than the Crude Oil and Natural Gas Business.

        Reports to Holders.  The Company will  deliver to the Trustee  within 15
days after the filing of the same with the  Commission,  copies of the quarterly
and annual reports and of the information,  documents and other reports, if any,
which the Company is required to file with the Commission pursuant to Section 13
or 15(d) of the  Exchange  Act.  Notwithstanding  that  the  Company  may not be
subject to the  reporting  requirements  of Section 13 or 15(d) of the  Exchange
Act, the Company will file with the  Commission,  to the extent  permitted,  and
provide the Trustee and Holders with such annual  reports and such  information,
documents and other  reports  specified in Sections 13 and 15(d) of the Exchange
Act. The Company will also comply with the other provisions of Section 314(a) of
the TIA.

Events of Default

        The  following  events  are  defined  in the  Indenture  as  "Events  of
Default":

        (a) the failure to pay interest  (including any Additional  Interest) on
any Notes when the same becomes due and payable and the default  continues for a
period of 30 days;

        (b) the failure to pay the principal on any Notes,  when such  principal
becomes due and payable,  at maturity,  upon redemption or otherwise  (including
the failure to make a payment to purchase Notes tendered pursuant to a Change of
Control Offer or a Net Proceeds Offer);

        (c) a default in the  observance or performance of any other covenant or
agreement  contained in the Indenture which default continues for a period of 30
days after either Issuer  receives  written  notice  specifying the default (and
demanding  that such default be remedied)  from the Trustee or the Holders of at
least 25% of the outstanding  principal  amount of the Notes (except in the case
of a default with respect to  observance or  performance  of any of the terms or
provisions  of  "--  Change  of  Control"  or  "Certain   Covenants  --  Merger,
Consolidation  and Sale of Assets" or "--  Limitation on Asset Sales" which will
constitute  an Event of Default  with such notice  requirement  but without such
passage of time requirement);

        (d) a default  under any mortgage,  indenture or instrument  under which
there  may  be  issued  or by  which  there  may be  secured  or  evidenced  any
Indebtedness  of the Company or of any Restricted  Subsidiary (or the payment of
which is guaranteed by the Issuers or any Restricted  Subsidiary),  whether such
Indebtedness now exists or is created after the Issue Date, which default (i) is
caused by a failure to pay principal of or premium,  if any, or interest on such
Indebtedness  after any applicable grace period provided in such Indebtedness (a
"payment  default") or (ii)  results in the  acceleration  of such  Indebtedness
prior to its express  maturity and, in each case,  the  principal  amount of any
such  Indebtedness,  together  with  the  principal  amount  of any  other  such
Indebtedness  under  which there has been a payment  default or the  maturity of
which has been so accelerated, aggregates at least $5,000,000;

        (e) one or more judgments in an aggregate amount in excess of $5,000,000
(unless covered by insurance by a reputable  insurer as to which the insurer has
acknowledged  coverage)  shall have been rendered  against the Company or any of
its Restricted  Subsidiaries and such judgments remain undischarged,  unvacated,
unpaid or  unstayed  for a period of 60 days after such  judgment  or  judgments
become final and non-appealable;

        (f) certain  events of  bankruptcy  affecting  the Company or any of its
Subsidiaries; or

        (g) any of the Guarantees cease to be in full force and effect or any of
the Guarantees are declared to be null and void or invalid and  unenforceable or


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<PAGE>

any of the Subsidiary  Guarantors  denies or disaffirms its liability  under its
Guarantees  (other  than by reason  of  release  of a  Subsidiary  Guarantor  in
accordance with the terms of the Indenture).

        The Indenture provides that, if an Event of Default (other than an Event
of Default  specified  in clause (f) above) shall occur and be  continuing,  the
Trustee or the Holders of at least 25% in principal amount of outstanding  Notes
may declare the principal of,  premium,  if any, and accrued and unpaid interest
on all the Notes to be due and  payable by notice in writing to the  Issuers and
the  Trustee  specifying  the  Event  of  Default  and that it is a  "notice  of
acceleration",  and the same shall become  immediately  due and  payable.  If an
Event of Default  specified in clause (f) above occurs and is  continuing,  then
all unpaid principal of, and premium, if any, and accrued and unpaid interest on
all of the outstanding  Notes shall ipso facto become and be immediately due and
payable  without any  declaration or other act on the part of the Trustee or any
Holder.

        The  Indenture  provides  that,  at any  time  after  a  declaration  of
acceleration with respect to the Notes as described in the preceding  paragraph,
the  Holders of a majority  in  principal  amount of the Notes may  rescind  and
cancel such  declaration and its  consequences  (a) if the rescission  would not
conflict with any judgment or decree, (b) if all existing Events of Default have
been cured or waived except  nonpayment of principal or interest that has become
due solely because of such  acceleration,  (c) to the extent the payment of such
interest is lawful,  interest on overdue  installments  of interest  and overdue
principal,   which  has  become  due  otherwise  than  by  such  declaration  of
acceleration,  has been  paid,  (d) if the  Issuers  have paid the  Trustee  its
reasonable   compensation   and   reimbursed   the  Trustee  for  its  expenses,
disbursements  and  advances  and (e) in the  event of the cure or  waiver of an
Event of  Default of the type  described  in clause  (f) of the  description  of
Events  of  Default  above,   the  Trustee  shall  have  received  an  officers'
certificate  and an opinion of counsel that such Event of Default has been cured
or waived; provided, however, that such counsel may rely, as to matters of fact,
on a certificate or certificates of officers of the Company.  No such rescission
shall affect any subsequent Default or impair any right consequent thereto.

        The Indenture  provides  that, at any time prior to the  declaration  of
acceleration of the Notes,  the Holders of a majority in principal amount of the
Notes may waive any existing  Default or Event of Default  under the  Indenture,
and its  consequences,  except a default in the payment of the  principal  of or
interest on any Notes.

        The  Indenture  provides  that  Holders of the Notes may not enforce the
Indenture  or the Notes except as provided in the  Indenture  and under the TIA.
During the existence of an Event of Default, the Trustee is required to exercise
such rights and powers  vested in it under the Indenture and use the same degree
of care and skill in its exercise thereof as a prudent man would exercise or use
under the  circumstances  in the  conduct  of his own  affairs.  Subject  to the
provisions  of the Indenture  relating to the duties of the Trustee,  whether or
not an Event of Default shall occur and be  continuing,  the Trustee is under no
obligation  to exercise any of its rights or powers  under the  Indenture at the
request,  order or  direction  of any of the  Holders,  unless such Holders have
offered to the Trustee  reasonable  indemnity.  Subject to all provisions of the
Indenture and applicable  law, the Holders of a majority in aggregate  principal
amount of the then outstanding  Notes have the right to direct the time,  method
and place of conducting any  proceeding for any remedy  available to the Trustee
or exercising any trust or power conferred on the Trustee.

        Under the  Indenture,  the Issuers are  required to provide an officers'
certificate to the Trustee promptly upon any such officer obtaining knowledge of
any Default or Event of Default  (provided that such officers shall provide such
certification at least annually whether or not they know of any Default or Event
of Default) that has occurred and, if applicable, describe such Default or Event
of Default and the status thereof.

Legal Defeasance and Covenant Defeasance

        The Issuers  may, at their  option and at any time,  elect to have their
obligations  and the  corresponding  obligations  of the  Subsidiary  Guarantors
discharged  with respect to the  outstanding  Notes ("Legal  Defeasance").  Such
Legal  Defeasance  means  that the  Issuers  shall be  deemed  to have  paid and
discharged the entire  indebtedness  represented by the outstanding  Notes,  and
satisfied all of their obligations with respect to the Notes, except for (a) the
rights of Holders to receive  payments in respect of the principal of,  premium,
if any, and  interest on the Notes when such  payments are due, (b) the Issuers'


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<PAGE>

obligations  with  respect  to the Notes  concerning  issuing  temporary  Notes,
registration  of  Notes,  mutilated,  destroyed,  lost or  stolen  Notes and the
maintenance of an office or agency for payments,  (c) the rights, powers, trust,
duties and immunities of the Trustee and the Issuers'  obligations in connection
therewith and (d) the Legal Defeasance provisions of the Indenture. In addition,
the Issuers may, at their option and at any time,  elect to have the obligations
of the Issuers released with respect to certain  covenants that are described in
the Indenture ("Covenant Defeasance") and thereafter any omission to comply with
such obligations shall not constitute a Default or Event of Default with respect
to the Notes.  In the event Covenant  Defeasance  occurs,  certain events (other
than  non-payment,  bankruptcy,  receivership,   reorganization  and  insolvency
events)  described  under "-- Events of Default"  will no longer  constitute  an
Event of Default with respect to the Notes.

        In order to exercise either Legal Defeasance or Covenant Defeasance, (a)
the Issuers must irrevocably deposit with the Trustee, in trust, for the benefit
of the  Holders  cash in  United  States  dollars,  non-callable  United  States
government  obligations,  or a combination  thereof,  in such amounts as will be
sufficient, in the opinion of a nationally recognized firm of independent public
accountants, to pay the principal of, premium, if any, and interest on the Notes
on the stated date for payment thereof or on the applicable  redemption date, as
the case may be; (b) in the case of Legal  Defeasance,  the  Issuers  shall have
delivered to the Trustee an opinion of counsel in the United  States  reasonably
acceptable to the Trustee confirming that (i) the Issuers have received from, or
there has been published by, the Internal Revenue Service a ruling or (ii) since
the Series A/B Issue  Date,  there has been a change in the  applicable  federal
income  tax law,  in either  case to the effect  that,  and based  thereon  such
opinion of counsel shall confirm  that,  the Holders will not recognize  income,
gain or  loss  for  federal  income  tax  purposes  as a  result  of such  Legal
Defeasance and will be subject to federal income tax on the same amounts, in the
same  manner  and at the same  times as would  have been the case if such  Legal
Defeasance had not occurred, (c) in the case of Covenant Defeasance, the Issuers
shall have  delivered to the Trustee an opinion of counsel in the United  States
reasonably  acceptable  to the  Trustee  confirming  that the  Holders  will not
recognize  income,  gain or loss for federal  income tax purposes as a result of
such Covenant  Defeasance  and will be subject to federal income tax on the same
amounts, in the same manner and at the same times as would have been the case if
such Covenant  Defeasance  had not occurred;  (d) no Default or Event of Default
shall have  occurred and be continuing on the date of such deposit or insofar as
Events of Default from  bankruptcy or insolvency  events are  concerned,  at any
time in the period  ending on the 91st day after the date of  deposit;  (e) such
Legal  Defeasance  or  Covenant  Defeasance  shall  not  result  in a breach  or
violation of, or constitute a default under the Indenture or any other agreement
or instrument to which the Company or any of its  Restricted  Subsidiaries  is a
party or by which the Company or any of its  Restricted  Subsidiaries  is bound;
(f) the Issuers  shall have  delivered to the Trustee an  officers'  certificate
stating  that  the  deposit  was not made by the  Issuers  with  the  intent  of
preferring  the Holders over any other  creditors  of either  Issuer or with the
intent of defeating,  hindering,  delaying or defrauding any other  creditors of
the Issuers or others;  (g) the Issuers  shall have  delivered to the Trustee an
officers'  certificate  and  an  opinion  of  counsel,  each  stating  that  all
conditions  precedent  provided for or relating to the Legal  Defeasance  or the
Covenant  Defeasance,  as the case may be, have been  complied  with;  provided,
however,  that such counsel may rely, as to matters of fact, on a certificate or
certificates of officers of the Company; (h) the Issuers shall have delivered to
the  Trustee  an  opinion  of  counsel  to the  effect  that  after the 91st day
following the deposit,  the trust funds will not be subject to the effect of any
applicable  bankruptcy,  insolvency,  reorganization  or similar laws  affecting
creditors' rights generally;  provided,  however, that such counsel may rely, as
to matters of fact, on a certificate or certificates of officers of the Issuers;
and (i) certain other customary conditions precedent are satisfied.

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<PAGE>

Satisfaction and Discharge

        The Indenture  will be discharged and will cease to be of further effect
(except as to surviving  rights of  registration  of transfer or exchange of the
Notes, as expressly  provided for in the Indenture) as to all outstanding  Notes
when (a) either  (i) all the  Notes,  theretofore  authenticated  and  delivered
(except  lost,  stolen or destroyed  Notes which have been  replaced or paid and
Notes for  whose  payment  money  has  theretofore  been  deposited  in trust or
segregated and held in trust by the Issuers and thereafter repaid to the Issuers
or  discharged  from  such  trust)  have  been  delivered  to  the  Trustee  for
cancellation  or (ii) all Notes not  theretofore  delivered  to the  Trustee for
cancellation  have  become due and  payable  and the  Issuers  have  irrevocably
deposited  or  caused  to be  deposited  with the  Trustee  funds  in an  amount
sufficient  to pay and  discharge  the  entire  Indebtedness  on the  Notes  not
theretofore  delivered  to the  Trustee  for  cancellation,  for  principal  of,
premium,  if any, and interest on the Notes to the date of deposit together with
irrevocable  instructions  from the Issuers  directing the Trustee to apply such
funds to the payment thereof at maturity or redemption,  as the case may be; (b)
the Issuers have paid all other sums payable under the Indenture by the Issuers;
and (c) the Issuers have delivered to the Trustee an officers'  certificate  and
an opinion of counsel stating that all conditions  precedent under the Indenture
relating to the  satisfaction  and discharge of the Indenture have been complied
with; provided, however, that such counsel may rely, as to matters of fact, on a
certificate or certificates of officers of the Issuers.

Modification of the Indenture

        From  time to time,  the  Issuers,  the  Subsidiary  Guarantors  and the
Trustee, without the consent of the Holders, may amend the Indenture for certain
specified purposes, including curing ambiguities, defects or inconsistencies, to
comply with any  requirements  of the  Commission in order to effect or maintain
the  qualification  of the  Indenture  under the TIA or to make any change  that
would provide any  additional  benefit or rights to the Holders or that does not
adversely  affect the rights of any Holder.  In formulating  its opinion on such
matters,  the  Trustee  will be  entitled  to rely on such  evidence as it deems
appropriate,  including,  without  limitation,  solely on an opinion of counsel;
provided,  however, that in delivering such opinion of counsel, such counsel may
rely, as to matters of fact, on a certificate or certificates of officers of the
Company.  Other  modifications  and amendments of the Indenture may be made with
the  consent  of the  Holders  of a  majority  in  principal  amount of the then
outstanding Notes issued under the Indenture,  except that,  without the consent
of each Holder  affected  thereby,  no  amendment  may: (a) reduce the amount of
Notes whose  Holders  must  consent to an  amendment;  (b) reduce the rate of or
change  or have  the  effect  of  changing  the time for  payment  of  interest,
including  defaulted  interest,  on any Notes;  (c) reduce the  principal  of or
change or have the effect of changing the fixed maturity of any Notes, or change
the date on which any Notes may be  subject  to  redemption  or  repurchase,  or
reduce the redemption or repurchase  price therefor;  (d) make any Notes payable
in money other than that stated in the Notes;  (e) make any change in provisions
of the  Indenture  protecting  the right of each  Holder to  receive  payment of
principal  of and  interest on such Note on or after the due date  thereof or to
bring suit to enforce  such  payment,  or  permitting  Holders of a majority  in
principal  amount of Notes to waive  Defaults or Events of  Default;  (f) amend,
change or modify in any material  respect the  obligation of the Issuers to make
and  consummate a Change of Control Offer in the event of a Change of Control or
make and consummate a Net Proceeds Offer with respect to any Asset Sale that has
been  consummated or modify any of the  provisions or  definitions  with respect
thereto;  (g) modify or change any  provision  of the  Indenture  or the related
definitions  affecting  ranking of the Notes or any  Guarantee in a manner which
adversely affects the Holders; or (h) release any Subsidiary  Guarantor from any
of its  obligations  under its  Guarantee  or the  Indenture  otherwise  than in
accordance with the terms of the Indenture.

Governing Law

        The Indenture provides that the Indenture,  the Notes and the Guarantees
will be governed by, and construed in accordance  with, the laws of the State of
New York but without giving effect to applicable  principles of conflicts of law
to the extent that the application of the law of another  jurisdiction  would be
required thereby.

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The Trustee

        The Indenture  provides that,  except during the continuance of an Event
of Default,  the Trustee will perform only such duties as are  specifically  set
forth in the Indenture. During the existence of an Event of Default, the Trustee
will exercise such rights and powers vested in it by the Indenture,  and use the
same degree of care and skill in its exercise as a prudent man would exercise or
use under the circumstances in the conduct of his own affairs.

        The Indenture and the provisions of the TIA contain certain  limitations
on the rights of the  Trustee,  should it become a creditor  of the Issuers or a
Subsidiary  Guarantor,  to obtain  payments  of claims  in  certain  cases or to
realize on certain property received in respect of any such claim as security or
otherwise.  Subject to the TIA, the Trustee will be permitted to engage in other
transactions;  provided,  however,  that if the Trustee acquires any conflicting
interest as described in the TIA, it must eliminate such conflict or resign.

Certain Definitions

        Set forth below is a summary of certain of the defined terms used in the
Indenture.  Reference is made to the  Indenture  for the full  definition of all
such terms,  as well as any other terms used herein for which no  definition  is
provided.

        "Acquired  Indebtedness"  means  Indebtedness  of a Person or any of its
Subsidiaries  (i)  existing  at  the  time  such  Person  becomes  a  Restricted
Subsidiary or at the time it merges or  consolidates  with the Company or any of
its Restricted Subsidiaries or (ii) which becomes Indebtedness of the Company or
a Restricted  Subsidiary in connection  with the acquisition of assets from such
Person,  in each case not incurred in  connection  with, or in  anticipation  or
contemplation  of,  such  Person  becoming  a  Restricted   Subsidiary  or  such
acquisition, merger or consolidation.

        "Adjusted Consolidated Net Tangible Assets" means (without duplication),
as of the  date  of  determination,  (a) the sum of (i)  discounted  future  net
revenues  from proved oil and gas  reserves of the Company and its  consolidated
Subsidiaries,  calculated in accordance with Commission  guidelines  (before any
state or federal  income tax), as estimated by a nationally  recognized  firm of
independent  petroleum  engineers  as of a date no earlier  than the date of the
Company's latest annual consolidated  financial statements,  as increased by, as
of the date of determination,  the estimated discounted future net revenues from
(A)  estimated  proved  oil and gas  reserves  acquired  since  the date of such
year-end reserve report, and (B) estimated oil and gas reserves  attributable to
upward  revisions of estimates of proved oil and gas reserves  since the date of
such year-end  reserve report due to  exploration,  development or  exploitation
activities,  in each case calculated in accordance  with  Commission  guidelines
(utilizing the prices utilized in such year-end reserve  report),  and decreased
by,  as of the  date of  determination,  the  estimated  discounted  future  net
revenues from (C) estimated proved oil and gas reserves  produced or disposed of
since the date of such  year-end  reserve  report and (D)  estimated oil and gas
reserves  attributable to downward  revisions of estimates of proved oil and gas
reserves  since the date of such  year-end  reserve  report  due to  changes  in
geological  conditions or other factors which would, in accordance with standard
industry practice,  cause such revisions,  in each case calculated in accordance
with  Commission  guidelines  (utilizing  the prices  utilized in such  year-end
reserve  report);  provided,   however,  that,  in  the  case  of  each  of  the
determinations  made  pursuant to clauses (A) through (D),  such  increases  and
decreases shall be as estimated by the Company's petroleum engineers,  unless in
the event  that  there is a  Material  Change as a result of such  acquisitions,
dispositions or revisions,  then the discounted future net revenues utilized for
purposes of this clause  (a)(i) shall be  confirmed in writing,  by a nationally
recognized firm of independent  petroleum  engineers (which may be the Company's
independent petroleum engineers who prepare the Company's annual reserve report)
plus (ii) the capitalized  costs that are attributable to oil and gas properties
of the Company and its  Subsidiaries to which no proved oil and gas reserves are
attributable,  based on the Company's  books and records as of a date no earlier
than the date of the Company's latest annual or quarterly financial  statements,
plus (iii) the Net  Working  Capital  on a date no earlier  than the date of the
Company's latest consolidated annual or quarterly financial statements plus (iv)
with  respect to each other  tangible  asset of the Company or its  consolidated


                                       77
<PAGE>

Restricted Subsidiaries  specifically including, but not to the exclusion of any
other qualifying  tangible assets, the Company's or its consolidated  Restricted
Subsidiaries' gas producing facilities and unproved oil and gas properties (less
any  remaining  deferred  income  taxes  which have been  allocated  to such gas
processing  facilities  in  connection  with  the  acquisition  thereof),  land,
equipment,  leasehold  improvements,  investments  carried on the equity method,
restricted cash and the carrying value of marketable securities,  the greater of
(A) the net book value of such other  tangible  asset on a date no earlier  than
the date of the  Company's  latest  consolidated  annual or quarterly  financial
statements or (B) the appraised  value, as estimated by a qualified  Independent
Advisor,  of such  other  tangible  assets  of the  Company  and its  Restricted
Subsidiaries,  as of a date no  earlier  than the date of the  Company's  latest
audited financial statements minus (b) minority interests and, to the extent not
otherwise taken into account in determining  Adjusted  Consolidated Net Tangible
Assets,  any gas  balancing  liabilities  of the  Company  and its  consolidated
Restricted  Subsidiaries  reflected in the Company's  latest  audited  financial
statements.  In addition  to, but without  duplication  of, the  foregoing,  for
purposes of this definition,  "Adjusted  Consolidated Net Tangible Assets" shall
be calculated  after giving effect,  on a pro forma basis, to (1) any Investment
not  prohibited by the Indenture,  to and including the date of the  transaction
giving rise to the need to calculate  Adjusted  Consolidated Net Tangible Assets
(the "Assets  Transaction  Date"), in any other Person that, as a result of such
Investment, becomes a Restricted Subsidiary of the Company, (2) the acquisition,
to and  including  the Assets  Transaction  Date (by  merger,  consolidation  or
purchase of stock or assets),  of any  business  or assets,  including,  without
limitation,   Permitted  Industry  Investments,  and  (3)  any  sales  or  other
dispositions  of  assets  permitted  by  the  Indenture  (other  than  sales  of
Hydrocarbons  or other  mineral  products in the  ordinary  course of  business)
occurring on or prior to the Assets Transaction Date.

        "Affiliate"  means, with respect to any specified Person,  (a) any other
Person who directly or indirectly through one or more  intermediaries  controls,
or is controlled by, or under common control with, such specified Person and (b)
any Related  Person of such Person.  The term  "control"  means the  possession,
directly or  indirectly,  of the power to direct or cause the  direction  of the
management  and policies of a Person,  whether  through the  ownership of voting
securities,   by  contract  or  otherwise;   and  the  terms  "controlling"  and
"controlled" have meanings correlative of the foregoing.

        "Affiliate  Transaction"  has  the  meaning  set  forth  under  "Certain
Covenants -- Limitation on Transactions with Affiliates."

        "Asset  Acquisition"  means  (a) an  Investment  by the  Company  or any
Restricted  Subsidiary  in any other Person  pursuant to which such Person shall
become a Restricted  Subsidiary,  or shall be merged with or into the Company or
any  Restricted  Subsidiary,  or  (b)  the  acquisition  by the  Company  or any
Restricted  Subsidiary  of the assets of any  Person  (other  than a  Restricted
Subsidiary)  which  constitute  all or  substantially  all of the assets of such
Person or comprises any division or line of business of such Person or any other
properties  or  assets  of such  Person  other  than in the  ordinary  course of
business.

        "Asset Sale" means any direct or indirect  sale,  issuance,  conveyance,
transfer,  exchange,  lease  (other than  operating  leases  entered into in the
ordinary  course of  business),  assignment  or other  transfer for value by the
Company or any of its Restricted  Subsidiaries (including any Sale and Leaseback
Transaction) to any Person other than the Company or a Restricted  Subsidiary of
(a) any Capital Stock of any Restricted Subsidiary; or (b) any other property or
assets  (including  any  interests  therein)  of the  Company or any  Restricted
Subsidiary,  including any  disposition by means of a merger,  consolidation  or
similar transaction;  provided,  however, that Asset Sales shall not include (i)
the  sale,  lease,   conveyance,   disposition  or  other  transfer  of  all  or
substantially all of the assets of the Company in a transaction which is made in
compliance with the provisions of "--Certain Covenants -- Merger,  Consolidation
and Sale of Assets", (ii) any Investment in an Unrestricted  Subsidiary which is
made in compliance with the provisions of "-- Certain Covenants -- Limitation on
Restricted   Payments"  above,  (iii)  disposals  or  replacements  of  obsolete
equipment in the ordinary course of business, (iv) the sale, lease,  conveyance,
disposition  or other  transfer  (each,  a  "Transfer")  by the  Company  or any
Restricted  Subsidiary  of  assets or  property  to the  Company  or one or more
Restricted  Subsidiaries,  (v) any  disposition of Hydrocarbons or other mineral
products for value in the  ordinary  course of business and (vi) the Transfer by
the Company or any  Restricted  Subsidiary of assets or property in the ordinary
course of business;  provided, however, that the aggregate amount (valued at the
fair market  value of such assets or property at the time of such  Transfer)  of
all such  assets  and  property  Transferred  since the  Series  A/B Issue  Date
pursuant to this clause (vi) shall not exceed $1,000,000 in any one year.

                                       78
<PAGE>

        "Board of Directors" means, as to any Person,  the board of directors of
such Person or any duly authorized committee thereof.

        "Board  Resolution"  means,  with  respect  to any  Person,  a copy of a
resolution  certified by the Secretary or an Assistant  Secretary of such Person
to have been duly  adopted by the Board of Directors of such Person and to be in
full force and effect on the date of such  certification,  and  delivered to the
Trustee.

        "Business Day" means any day other than a Saturday,  Sunday or any other
day on which  banking  institutions  in the City of New  York  are  required  or
authorized by law or other governmental action to be closed.

        "Capitalized  Lease Obligation"  means, as to any Person, the discounted
present  value of the rental  obligations  of such  Person  under a lease of (or
other agreement conveying the right to use) any property (whether real, personal
or mixed) that is required to be classified and accounted for as a capital lease
obligation at such date, determined in accordance with GAAP.

        "Capital  Stock"  means  (a)  with  respect  to  any  Person  that  is a
corporation, any and all shares, interests,  participations or other equivalents
(however  designated  and whether or not voting) of corporate  stock,  including
each class of Common Stock and Preferred  Stock of such Person and including any
warrants,  options or rights to acquire  any of the  foregoing  and  instruments
convertible into any of the foregoing and (b) with respect to any Person that is
not a corporation,  any and all  partnership  or other equity  interests of such
Person.

        "Cash Equivalents" means (a) marketable direct obligations issued by, or
unconditionally  guaranteed  by, the United  States  Government or issued by any
agency thereof and backed by the full faith and credit of the United States,  in
each case maturing  within one year from the date of  acquisition  thereof;  (b)
marketable  direct  obligations  issued  by any  state of the  United  States of
America  or  any  political   subdivision  of  any  such  state  or  any  public
instrumentality  thereof  maturing  within one year from the date of acquisition
thereof and, at the time of  acquisition,  having one of the two highest ratings
obtainable  from  either  Standard  &  Poor's  Corporation  ("S&P")  or  Moody's
Investors Service, Inc. ("Moody's");  (c) commercial paper maturing no more than
one year from the date of  creation  thereof  and,  at the time of  acquisition,
having a rating  of at least  A-1  from S&P or at least  P-1 from  Moody's;  (d)
certificates  of deposit or bankers'  acceptances  maturing within one year from
the date of acquisition  thereof issued by any bank organized  under the laws of
the United States of America or any state thereof or the District of Columbia or
any United  States  branch of a foreign  bank having at the date of  acquisition
thereof  combined  capital  and  surplus  of not  less  than  $250,000,000;  (e)
repurchase  obligations  with a term of not more than seven days for  underlying
securities of the types described in clause (a) above entered into with any bank
meeting the  qualifications  specified  in clause (d) above and (f) money market
mutual or similar funds having assets in excess of $100,000,000.

        "Change of Control" means the occurrence of one or more of the following
events: (a) any sale, lease, exchange or other transfer (in one transaction or a
series of related transactions) of all or substantially all of the assets of the
Company to any Person or group of related  Persons for purposes of Section 13(d)
of the Exchange Act (a "Group") (whether or not otherwise in compliance with the
provisions of the  Indenture);  (b) the approval by the holders of Capital Stock
of the Company of any plan or proposal for the liquidation or dissolution of the
Company  (whether or not  otherwise in  compliance  with the  provisions  of the
Indenture);  (c) any  Person  or Group  shall  become  the  owner,  directly  or
indirectly,  beneficially or of record, of shares  representing more than 35% of
the aggregate  ordinary  voting power  represented by the issued and outstanding
Capital Stock of the Company;  or (d) the replacement of a majority of the Board
of  Directors  of the  Company  over a two-year  period from the  directors  who
constituted  the Board of  Directors  of the  Company at the  beginning  of such
period  with  directors  whose  replacement  shall  not have been  approved  (by
recommendation,  nomination  or  election,  as the  case may be) by a vote of at
least a majority of the Board of  Directors  of the Company then still in office
who either were  members of such Board of  Directors  at the  beginning  of such
period or whose  election as a member of such Board of Directors was  previously
so approved.

        "Change of Control  Offer" has the meaning set forth under "-- Change of
Control."

                                       79
<PAGE>

        "Change of Control  Payment  Date" has the  meaning  set forth under "--
Change of Control."

        "Common  Stock" of any Person  means any and all  shares,  interests  or
other  participations in, and other equivalents  (however designated and whether
voting or non-voting) of such Person's common stock,  whether outstanding on the
Issue Date or issued after the Issue Date, and includes, without limitation, all
series and classes of such common stock.

        "Commission" means the Securities and Exchange Commission.

        "Company" means Abraxas Petroleum Corporation, a Nevada corporation.

        "Company  Properties" means all Properties,  and equity,  partnership or
other ownership interests therein, that are related or incidental to, or used or
useful in connection  with, the conduct or operation of any business  activities
of the Company or the Subsidiaries, which business activities are not prohibited
by the terms of the Indenture.

        "Consolidated   EBITDA"  means,   for  any  period,   the  sum  (without
duplication) of (a) Consolidated  Net Income and (b) to the extent  Consolidated
Net Income has been reduced thereby, (i) all income taxes of the Company and its
Restricted  Subsidiaries paid or accrued in accordance with GAAP for such period
(other than income taxes attributable to extraordinary,  unusual or nonrecurring
gains or losses  or taxes  attributable  to sales or  dispositions  outside  the
ordinary course of business),  (ii)  Consolidated  Interest  Expense,  (iii) the
amount of any Preferred  Stock  dividends paid by the Company and its Restricted
Subsidiaries and (iv)  Consolidated  Non-cash  Charges,  less any non-cash items
increasing  Consolidated  Net Income for such  period,  all as  determined  on a
consolidated basis for the Company and its Restricted Subsidiaries in accordance
with GAAP.

        "Consolidated EBITDA Coverage Ratio" means, with respect to the Company,
the ratio of (a) Consolidated  EBITDA of the Company during the four full fiscal
quarters for which  financial  information in respect  thereof is available (the
"Four Quarter Period") ending on or prior to the date of the transaction  giving
rise to the need to  calculate  the  Consolidated  EBITDA  Coverage  Ratio  (the
"Transaction  Date") to (b)  Consolidated  Fixed  Charges of the Company for the
Four Quarter Period. In addition to and without limitation of the foregoing, for
purposes  of this  definition,  "Consolidated  EBITDA" and  "Consolidated  Fixed
Charges" shall be calculated after giving effect (without  duplication) on a pro
forma  basis  for the  period  of such  calculation  to (a)  the  incurrence  or
repayment  of  any  Indebtedness  of  the  Company  or  any  of  its  Restricted
Subsidiaries  (and the  application of the proceeds  thereof) giving rise to the
need to  make  such  calculation  and  any  incurrence  or  repayment  of  other
Indebtedness  (and the  application  of the  proceeds  thereof),  other than the
incurrence or repayment of  indebtedness  in the ordinary course of business for
working  capital  purposes  pursuant to working  capital  facilities,  occurring
during the Four Quarter Period or at any time  subsequent to the last day of the
Four  Quarter  Period  and on or  prior  to the  Transaction  Date,  as if  such
incurrence or repayment, as the case may be (and the application of the proceeds
thereof), occurred on the first day of the Four Quarter Period and (b) any Asset
Sales  or  Asset  Acquisitions   (including,   without  limitation,   any  Asset
Acquisition  giving rise to the need to make such calculation as a result of the
Company or one of its Restricted  Subsidiaries (including any Person who becomes
a  Restricted  Subsidiary  as a  result  of the  Asset  Acquisition)  incurring,
assuming  or  otherwise  being  liable  for  Acquired  Indebtedness,   and  also
including,  without  limitation,  any  Consolidated  EBITDA  attributable to the
assets which are the subject of the Asset  Acquisition  or Asset Sale during the
Four Quarter  Period)  occurring  during the Four Quarter  Period or at any time
subsequent  to the last day of the Four  Quarter  Period  and on or prior to the
Transaction  Date,  as if such Asset Sale or Asset  Acquisition  (including  the
incurrence, assumption or liability for any such Acquired Indebtedness) occurred
on the  first  day of the Four  Quarter  Period.  If the  Company  or any of its
Restricted  Subsidiaries  directly or indirectly  guarantees  Indebtedness  of a
third Person, the preceding sentence shall give effect to the incurrence of such
guaranteed  Indebtedness as if the Company or the Restricted Subsidiary,  as the
case  may be,  had  directly  incurred  or  otherwise  assumed  such  guaranteed
Indebtedness.  Furthermore,  in  calculating  "Consolidated  Fixed  Charges" for
purposes  of  determining  the  denominator  (but  not  the  numerator)  of this
"Consolidated  EBITDA Coverage Ratio," (i) interest on outstanding  Indebtedness
determined  on a  fluctuating  basis as of the  Transaction  Date and which will


                                       80
<PAGE>

continue to be so  determined  thereafter  shall be deemed to have  accrued at a
fixed  rate per annum  equal to the rate of  interest  on such  Indebtedness  in
effect on the Transaction  Date; (ii) if interest on any  Indebtedness  actually
incurred on the  Transaction  Date may  optionally  be determined at an interest
rate based upon a factor of a prime or similar  rate, a  eurocurrency  interbank
offered  rate,  or  other  rates,  then  the  interest  rate  in  effect  on the
Transaction  Date will be deemed to have been in effect  during the Four Quarter
Period;  (iii)   notwithstanding   clauses  (i)  and  (ii)  above,  interest  on
Indebtedness  determined on a fluctuating  basis, to the extent such interest is
covered by agreements relating to Interest Swap Obligations,  shall be deemed to
accrue at the rate per annum  resulting  after giving effect to the operation of
such agreements.

        "Consolidated  Fixed Charges" means, with respect to the Company for any
period,  the sum,  without  duplication,  of (a)  Consolidated  Interest Expense
(including any premium or penalty paid in connection  with redeeming or retiring
Indebtedness of the Company and its Restricted  Subsidiaries prior to the stated
maturity thereof pursuant to the agreements  governing such Indebtedness),  plus
(b) the  product of (i) the  amount of all  dividend  payments  on any series of
Preferred  Stock of the Company (other than dividends paid in Qualified  Capital
Stock) paid, accrued or scheduled to be paid or accrued during such period times
(ii) a fraction,  the numerator of which is one and the  denominator of which is
one minus  the then  current  effective  consolidated  federal,  state and local
income tax rate of such Person, expressed as a decimal.

        "Consolidated  Interest  Expense" means, with respect to the Company for
any period, the sum of, without  duplication:  (a) the aggregate of the interest
expense  of  the  Company  and  its  Restricted  Subsidiaries  for  such  period
determined on a consolidated  basis in accordance with GAAP,  including  without
limitation,  (i) any amortization of original issue discount, (ii) the net costs
under Interest Swap  Obligations,  (iii) all  capitalized  interest and (iv) the
interest  portion  of any  deferred  payment  obligation;  and (b) the  interest
component of Capitalized Lease Obligations paid,  accrued and/or scheduled to be
paid or accrued by the  Company  and its  Restricted  Subsidiaries  during  such
period, as determined on a consolidated basis in accordance with GAAP.

        "Consolidated  Net Income"  means,  with  respect to the Company for any
period,  the  aggregate  net income (or loss) of the Company and its  Restricted
Subsidiaries for such period on a consolidated  basis,  determined in accordance
with  GAAP;  provided,  however,  that there  shall be  excluded  therefrom  (a)
after-tax gains from Asset Sales or abandonments or reserves  relating  thereto,
(b) after-tax items classified as  extraordinary or nonrecurring  gains, (c) the
net  income of any  Person  acquired  in a "pooling  of  interests"  transaction
accrued  prior to the date it becomes a  Restricted  Subsidiary  or is merged or
consolidated with the Company or any Restricted  Subsidiary,  (d) the net income
(but not loss) of any Restricted  Subsidiary to the extent that the  declaration
of dividends or similar  distributions  by that  Restricted  Subsidiary  of that
income is restricted by charter,  contract,  operation of law or otherwise,  (e)
the net income of any Person in which the Company has an interest,  other than a
Restricted  Subsidiary,  except to the extent of cash dividends or distributions
actually paid to the Company or to a Restricted  Subsidiary by such Person,  (f)
income or loss  attributable  to  discontinued  operations  (including,  without
limitation,  operations  disposed  of during  such  period  whether  or not such
operations were classified as  discontinued)  and (g) in the case of a successor
to the Company by  consolidation  or merger or as a transferee  of the Company's
assets,  any net income  (or loss) of the  successor  corporation  prior to such
consolidation, merger or transfer of assets.

        "Consolidated  Net  Worth"  of any  Person  as of  any  date  means  the
consolidated  stockholders' equity of such Person,  determined on a consolidated
basis in accordance with GAAP, less (without  duplication)  amounts attributable
to Disqualified Capital Stock of such Person.

        "Consolidated  Non-cash Charges" means, with respect to the Company, for
any  period,  the  aggregate  depreciation,  depletion,  amortization  and other
non-cash  expenses  of the  Company  and its  Restricted  Subsidiaries  reducing
Consolidated  Net  Income  of the  Company  for  such  period,  determined  on a
consolidated   basis  in  accordance  with  GAAP  (excluding  any  such  charges
constituting an extraordinary  item or loss or any such charge which requires an
accrual of or a reserve for cash charges for any future period).

        "consolidation"  means, with respect to any Person, the consolidation of
the accounts of the  Restricted  Subsidiaries  of such Person with those of such
Person, all in accordance with GAAP;  provided,  however,  that  "consolidation"
will not include consolidation of the accounts of any Unrestricted Subsidiary of
such Person with the  accounts of such  Person.  The term  "consolidated"  has a
correlative meaning to the foregoing.

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<PAGE>

        "Covenant  Defeasance"  has  the  meaning  set  forth  under  "--  Legal
Defeasance and Covenant Defeasance."

        "Credit  Facility" means the Amended and Restated Credit Agreement dated
as of November 14,  1996,  by and among the  Company,  BTCo and ING Capital,  as
Co-Agents,  and  each  of  the  Lenders  named  therein,  or  any  successor  or
replacement  agreement  and  whether by the same or any other  agent,  lender or
group of  lenders,  together  with the  related  documents  thereto  (including,
without limitation,  any guarantee agreements and security  documents),  in each
case as such agreements have been or may be amended (including any amendment and
restatement  thereof),  supplemented  or otherwise  modified  from time to time,
including  any  agreements  extending the maturity of,  refinancing,  replacing,
increasing  or otherwise  restructuring  all or any portion of the  Indebtedness
under such agreements.

        "Crude  Oil  and  Natural  Gas  Business"  means  (i)  the  acquisition,
exploration, development, operation and disposition of interests in oil, gas and
other hydrocarbon  properties located in North America,  and (ii) the gathering,
marketing,  treating,  processing,  storage,  selling  and  transporting  of any
production from such interests or properties of the Company or of others.

        "Crude Oil and Natural Gas Hedge Agreements"  means, with respect to any
Person,  any oil and gas agreements and other  agreements or arrangements or any
combination  thereof  entered  into by such  Person  in the  ordinary  course of
business and that is designed to provide  protection against oil and natural gas
price fluctuations.

        "Crude Oil and Natural Gas Properties"  means all Properties,  including
equity or other ownership interests therein, owned by any Person which have been
assigned "proved oil and gas reserves" as defined in Rule 4-10 of Regulation S-X
of the Securities Act as in effect on the Issue Date.

        "Crude Oil and Natural  Gas  Related  Assets"  means any  Investment  or
capital   expenditure  (but  not  including  additions  to  working  capital  or
repayments of any revolving credit or working capital borrowings) by the Company
or any Subsidiary of the Company which is related to the business of the Company
and its  Subsidiaries  as it is  conducted  on the date of the Asset Sale giving
rise to the Net Cash Proceeds to be reinvested.

        "Currency Agreement" means any foreign exchange contract,  currency swap
agreement  or other  similar  agreement or  arrangement  designed to protect the
Company or any  Restricted  Subsidiary of the Company  against  fluctuations  in
currency values.

        "Default"  means an event or condition  the  occurrence  of which is, or
with the lapse of time or the  giving  of  notice or both  would be, an Event of
Default.

        "Disqualified  Capital  Stock" means that  portion of any Capital  Stock
which,  by  its  terms  (or by  the  terms  of any  security  into  which  it is
convertible  or for  which it is  exchangeable),  or upon the  happening  of any
event,  matures  or  is  mandatorily  redeemable,  pursuant  to a  sinking  fund
obligation or otherwise,  or is mandatorily redeemable at the sole option of the
holder  thereof,  in whole or in part,  in either case, on or prior to the final
maturity of the Notes.

        "Equity  Offering"  means an offering of Qualified  Capital Stock of the
Company.

        "Exchange Act" means the Securities Exchange Act of 1934, as amended, or
any successor statute or statutes thereto.

        "fair market  value" means,  with respect to any asset or property,  the
price which could be negotiated in an arm's-length, free market transaction, for
cash,  between an informed and willing seller and an informed and willing buyer,
neither  of  whom  is  under  undue  pressure  or  compulsion  to  complete  the
transaction.  Fair market value shall be determined by the Board of Directors of
the Company  acting  reasonably  and in good faith and shall be  evidenced  by a
Board  Resolution of the Company  delivered to the Trustee;  provided,  however,
that (A) if the aggregate  non-cash  consideration to be received by the Company


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<PAGE>

or any Restricted Subsidiary from any Asset Sale shall reasonably be expected to
exceed  $5,000,000  or (B) if the net worth of any  Restricted  Subsidiary to be
designated as an Unrestricted  Subsidiary shall reasonably be expected to exceed
$10,000,000,  then fair  market  value  shall be  determined  by an  Independent
Advisor.

        "GAAP" means generally accepted  accounting  principles set forth in the
opinions and  pronouncements of the Accounting  Principles Board of the American
Institute of Certified Public  Accountants and statements and  pronouncements of
the Financial Accounting Standards Board as of any date of determination.

        "Holder" means any Person holding a Note.

        "Hydrocarbons"  means oil, gas,  casinghead gas, drip gasoline,  natural
gasoline, condensate,  distillate, liquid hydrocarbons, gaseous hydrocarbons and
all  constituents,   elements  or  compounds  thereof  and  products   processed
therefrom.

        "Incur"  has the  meaning  set forth  under  "--  Certain  Covenants  --
Limitation on Incurrence of Additional Indebtedness."

        "Indebtedness"  means with respect to any Person,  without  duplication,
(a) all  Obligations of such Person for borrowed  money,  (b) all Obligations of
such Person evidenced by bonds, debentures,  notes or other similar instruments,
(c) all  Capitalized  Lease  Obligations of such Person,  (d) all Obligations of
such Person issued or assumed as the deferred  purchase  price of property,  all
conditional  sale  obligations  and all  Obligations  under any title  retention
agreement (but excluding  trade accounts  payable),  (e) all Obligations for the
reimbursement  of any  obligor on a letter of  credit,  banker's  acceptance  or
similar credit transaction,  (f) guarantees and other contingent  obligations in
respect of Indebtedness  referred to in clauses (a) through (e) above and clause
(h) below,  (g) all  Obligations  of any other Person of the type referred to in
clauses (a)  through (f) above which are secured by any Lien on any  property or
asset of such  Person,  the  amount of such  Obligation  being  deemed to be the
lesser of the fair market  value of such  property or asset or the amount of the
Obligation  so  secured,  (h) all  Obligations  under  Currency  Agreements  and
Interest Swap Obligations and (i) all Disqualified  Capital Stock issued by such
Person with the amount of Indebtedness  represented by such Disqualified Capital
Stock being equal to the greater of its  voluntary  or  involuntary  liquidation
preference  and its maximum  fixed  redemption  price or repurchase  price.  For
purposes  hereof,  the  "maximum  fixed  repurchase  price" of any  Disqualified
Capital Stock which does not have a fixed  repurchase  price shall be calculated
in  accordance  with the  terms of such  Disqualified  Capital  Stock as if such
Disqualified  Capital  Stock were  purchased  on any date on which  Indebtedness
shall be required to be determined pursuant to the Indenture,  and if such price
is based  upon,  or  measured  by, the fair  market  value of such  Disqualified
Capital Stock, such fair market value shall be determined reasonably and in good
faith by the Board of  Directors  of the  Company.  The  "amount" or  "principal
amount" of Indebtedness at any time of determination as used herein  represented
by (a) any Indebtedness issued at a price that is less than the principal amount
at  maturity  thereof  shall be the face  amount  of the  liability  in  respect
thereof,  (b) any Capitalized Lease Obligation shall be the amount determined in
accordance  with the  definition  thereof,  (c) any  Interest  Swap  Obligations
included in the  definition  of Permitted  Indebtedness  shall be zero,  (d) all
other  unconditional  obligations  shall be the amount of the liability  thereof
determined  in  accordance  with GAAP and (e) all other  contingent  obligations
shall be the maximum liability at such date of such Person.

        "Independent  Advisor"  means  a  reputable  accounting,   appraisal  or
nationally  recognized  investment  banking,  engineering or consulting firm (a)
which does not, and whose  directors,  officers and  employees or  Affiliates do
not, have a direct or indirect  material  financial  interest in the Company and
(b)  which,  in the  judgment  of the  Board of  Directors  of the  Company,  is
otherwise disinterested, independent and qualified to perform the task for which
it is to be engaged.

        "Initial Purchaser" means Jefferies & Company, Inc.

        "Interest Swap Obligation"  means the obligations of any Person pursuant
to any arrangement with any other Person, whereby, directly or indirectly,  such


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Person is entitled to receive from time to time periodic payments  calculated by
applying  either a floating  or a fixed rate of  interest  on a stated  notional
amount in exchange for periodic payments made by such other Person calculated by
applying a fixed or a floating rate of interest on the same notional  amount and
shall include,  without limitation,  interest rate swaps, caps, floors,  collars
and similar agreements.

        "Investment"  means, with respect to any Person,  any direct or indirect
(i) loan, advance or other extension of credit (including, without limitation, a
guarantee) or capital contribution to (by means of any transfer of cash or other
property  (valued at the fair market  value  thereof as of the date of transfer)
others or any  payment  for  property  or  services  for the  account  or use of
others),  (ii)  purchase or  acquisition  by such  Person of any Capital  Stock,
bonds, notes, debentures or other securities or evidences of Indebtedness issued
by, any Person (whether by merger, consolidation,  amalgamation or otherwise and
whether  or not  purchased  directly  from  the  issuer  of such  securities  or
evidences of Indebtedness), (iii) guarantee or assumption of the Indebtedness of
any other Person (other than the guarantee or assumption of Indebtedness of such
Person or a Restricted  Subsidiary of such Person which  guarantee or assumption
is made in compliance with the provisions of "--Certain  Covenants -- Limitation
on  Incurrence  of Additional  Indebtedness"  above),  and (iv) other items that
would be classified as investments on a balance sheet of such Person prepared in
accordance with GAAP. Notwithstanding the foregoing,  "Investment" shall exclude
extensions  of trade credit by the Company and its  Restricted  Subsidiaries  on
commercially  reasonable  terms in accordance with normal trade practices of the
Company  or such  Restricted  Subsidiary,  as the case may be. The amount of any
Investment  shall not be  adjusted  for  increases  or  decreases  in value,  or
write-ups,  write-downs or write-offs  with respect to such  Investment.  If the
Company or any Restricted  Subsidiary sells or otherwise disposes of any Capital
Stock of any Restricted  Subsidiary  such that,  after giving effect to any such
sale or  disposition,  it ceases to be a Subsidiary of the Company,  the Company
shall be  deemed  to have  made an  Investment  on the date of any such  sale or
disposition  equal  to the  fair  market  value  of the  Capital  Stock  of such
Restricted Subsidiary not sold or disposed of.

        "Issue Date" means the date of original issuance of the Series C Notes.

        "Legal  Defeasance" has the meaning set forth under "-- Legal Defeasance
and Covenant Defeasance."

        "Lien"  means  any  lien,  mortgage,  deed of  trust,  pledge,  security
interest,  charge or encumbrance of any kind (including any conditional  sale or
other  title  retention  agreement,  any  lease in the  nature  thereof  and any
agreement to give any security interest).

        "Material  Change" means an increase or decrease of more than 10% during
a fiscal quarter in the discounted future net cash flows (excluding changes that
result  solely from  changes in prices)  from proved oil and gas reserves of the
Company and consolidated  Subsidiaries (before any state or federal income tax);
provided,  however, that the following will be excluded from the Material Change
calculation:  (i) any  acquisitions  during the quarter of oil and gas  reserves
that have been  estimated  by  independent  petroleum  engineers  and on which a
report or reports  exist,  (ii) any  disposition  of properties  existing at the
beginning of such quarter that have been disposed of as provided in  "Limitation
on Asset Sales" and (iii) any reserves added during the quarter  attributable to
the  drilling  or  recompletion  of  wells  not  included  in  previous  reserve
estimates, but which will be included in future quarters.

        "Net Cash Proceeds" means,  with respect to any Asset Sale, the proceeds
in the  form of cash  or Cash  Equivalents  including  payments  in  respect  of
deferred  payment  obligations  when  received  in the  form  of  cash  or  Cash
Equivalents  received by the Company or any of its Restricted  Subsidiaries from
such Asset Sale net of (a) reasonable  out-of-pocket  expenses and fees relating
to such  Asset  Sale  (including,  without  limitation,  legal,  accounting  and
investment banking fees and sales commissions),  (b) taxes paid or payable after
taking into account any reduction in consolidated tax liability due to available
tax credits or  deductions  and any tax sharing  arrangements,  (c) repayment of
Indebtedness  that is required to be repaid in  connection  with such Asset Sale
and (d) appropriate  amounts  (determined by the Chief Financial  Officer of the
Company) to be provided by the Company or any Restricted Subsidiary, as the case
may be,  as a  reserve,  in  accordance  with  GAAP,  against  any post  closing
adjustments or liabilities  associated  with such Asset Sale and retained by the
Company or any Restricted Subsidiary, as the case may be, after such Asset Sale,


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<PAGE>

including,  without  limitation,   pension  and  other  post-employment  benefit
liabilities,  liabilities related to environmental matters and liabilities under
any indemnification  obligations  associated with such Asset Sale (but excluding
any payments which, by the terms of the indemnities will not, be made during the
term of the Notes).

        "Net  Proceeds  Offer"  has the  meaning  set forth  under  "--  Certain
Covenants -- Limitation on Asset Sales."

        "Net Proceeds  Offer  Adjustment  Ratio" has the meaning set forth under
"-- Certain Covenants -- Limitation on Asset Sales."

        "Net Proceeds  Offer Amount" has the meaning set forth under "-- Certain
Covenants --Limitation on Asset Sales."

        "Net  Proceeds  Offer  Payment Date" has the meaning set forth under "--
Certain Covenants -- Limitation on Asset Sales."

        "Net  Proceeds  Offer  Trigger Date" has the meaning set forth under "--
Certain Covenants -- Limitation on Asset Sales."

        "Net Working  Capital"  means (i) all current  assets of the Company and
its consolidated Subsidiaries, minus (ii) all current liabilities of the Company
and its  consolidated  Subsidiaries,  except  current  liabilities  included  in
Indebtedness,  in each case as set forth in financial  statements of the Company
prepared in accordance with GAAP.

        "Non-Recourse   Indebtedness"   with   respect  to  any   Person   means
Indebtedness of such Person for which (i) the sole legal recourse for collection
of principal and interest on such  Indebtedness is against the specific property
identified in the instruments  evidencing or securing such Indebtedness and such
property  was  acquired  with  the  proceeds  of  such   Indebtedness   or  such
Indebtedness  was incurred within 90 days after the acquisition of such property
and (ii) no other assets of such Person may be realized  upon in  collection  of
principal or interest on such  Indebtedness;  provided,  however,  that any such
Indebtedness  shall  not  cease to be  "Non-Recourse  Indebtedness"  solely as a
result of the instrument  governing such Indebtedness  containing terms pursuant
to which such Indebtedness  becomes recourse upon (a) fraud or misrepresentation
by the Person in connection with such  Indebtedness,  (b) such Person failing to
pay taxes or other  charges  that result in the creation of liens on any portion
of the specific  property  securing such Indebtedness or failing to maintain any
insurance  on  such  property  required  under  the  instruments  securing  such
Indebtedness, (c) the conversion of any of the collateral for such Indebtedness,
(d) such Person failing to maintain any of the collateral for such  Indebtedness
in the condition required under the instruments  securing the Indebtedness,  (e)
any income generated by the specific property  securing such Indebtedness  being
applied  in a manner not  otherwise  allowed in the  instruments  securing  such
Indebtedness,  (f) the violation of any  applicable  law or ordinance  governing
hazardous  materials or  substances  or otherwise  affecting  the  environmental
condition of the specific  property  securing the Indebtedness or (g) the rights
of the holder of such Indebtedness to the specific  property becoming  impaired,
suspended or reduced by any act, omission or  misrepresentation  of such Person;
provided,  further,  however,  that upon the  occurrence of any of the foregoing
clauses (a) through (g) above, any such Indebtedness  which shall have ceased to
be  "Non-Recourse  Indebtedness"  shall  be  deemed  to have  been  Indebtedness
incurred by such Person at such time.

        "Notes" means the Series C Notes and the Exchange Notes.

        "Obligations"  means all obligations for principal,  premium,  interest,
penalties, fees, indemnifications, reimbursements, damages and other liabilities
payable under the documentation governing any Indebtedness.

        "Payment  Restriction"  has the  meaning  set forth  under  "--  Certain
Covenants --  Limitation on Dividend and Other  Payment  Restrictions  Affecting
Restricted Subsidiaries."

        "Permitted  Indebtedness"  means,  without  duplication,   each  of  the
following:

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<PAGE>

        (a)  Indebtedness  under the Notes,  the  Exchange  Notes,  the  Private
Exchange Notes, if any, the Indenture, the Guarantees, the Series A/B Notes, the
Series A/B Indenture and any guarantees relating to the Series A/B Notes;

        (b)  Indebtedness  incurred  pursuant  to  the  Credit  Facility  in  an
aggregate  principal amount at any time  outstanding not to exceed  $50,000,000,
reduced  by any  required  permanent  repayments  (which  are  accompanied  by a
corresponding permanent commitment reduction) thereunder;

        (c) Interest Swap Obligations of the Company or a Restricted  Subsidiary
covering  Indebtedness  of the  Company or any of its  Restricted  Subsidiaries;
provided,  however,  that such  Interest  Swap  Obligations  are entered into to
protect  the  Company  and its  Restricted  Subsidiaries  from  fluctuations  in
interest rates on Indebtedness  incurred in accordance with the Indenture to the
extent the notional  principal amount of such Interest Swap Obligations does not
exceed the  principal  amount of the  Indebtedness  to which such  Interest Swap
Obligation relates;

        (d)  Indebtedness  of a  Restricted  Subsidiary  to the  Company or to a
Wholly Owned Restricted  Subsidiary for so long as such  Indebtedness is held by
the Company or a Wholly Owned Restricted Subsidiary,  in each case subject to no
Lien  held by a Person  other  than the  Company  or a Wholly  Owned  Restricted
Subsidiary;  provided, however, that if as of any date any Person other than the
Company  or a  Wholly  Owned  Restricted  Subsidiary  owns  or  holds  any  such
Indebtedness or holds a Lien in respect of such Indebtedness, such date shall be
deemed the incurrence of Indebtedness not constituting Permitted Indebtedness by
the issuer of such Indebtedness;

        (e) Indebtedness of the Company to a Wholly Owned Restricted  Subsidiary
for  so  long  as  such  Indebtedness  is  held  by a  Wholly  Owned  Restricted
Subsidiary,  in each case subject to no Lien;  provided,  however,  that (i) any
Indebtedness  of the Company to any Wholly Owned  Restricted  Subsidiary that is
not a Subsidiary Guarantor is unsecured and subordinated,  pursuant to a written
agreement,  to the Company's  obligations  under the Indenture and the Notes and
(ii)  if as of any  date  any  Person  other  than  a  Wholly  Owned  Restricted
Subsidiary  owns or holds any such  Indebtedness  or holds a Lien in  respect of
such Indebtedness,  such date shall be deemed the incurrence of Indebtedness not
constituting Permitted Indebtedness by the Company;

        (f) Indebtedness  arising from the honoring by a bank or other financial
institution of a check, draft or similar instrument inadvertently (except in the
case of daylight  overdrafts) drawn against  insufficient  funds in the ordinary
course of business;  provided,  however,  that such Indebtedness is extinguished
within two Business Days of incurrence;

        (g)  Indebtedness  of the Company or any of its Restricted  Subsidiaries
represented  by  letters  of  credit  for the  account  of the  Company  or such
Restricted  Subsidiary,  as the case may be, in order to  provide  security  for
workers'   compensation   claims,   payment   obligations  in  connection   with
self-insurance or similar requirements in the ordinary course of business;

        (h) Refinancing Indebtedness;

        (i)  Capitalized  Lease  Obligations  of the Company  outstanding on the
Series A/B Issue Date;

        (j) Capitalized Lease Obligations and Purchase Money Indebtedness of the
Company or any of its Restricted  Subsidiaries  not to exceed  $5,000,000 at any
one time outstanding;

        (k) Permitted Operating Obligations;

        (l)  Obligations  arising in  connection  with Crude Oil and Natural Gas
Hedge Agreements of the Company or a Restricted Subsidiary;

        (m) Non-Recourse Indebtedness;

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<PAGE>

        (n) Indebtedness under Currency Agreements;  provided,  however, that in
the case of Currency  Agreements  which relate to  Indebtedness,  such  Currency
Agreements do not increase the  Indebtedness  of the Company and its  Restricted
Subsidiaries  outstanding  other  than as a result of  fluctuations  in  foreign
currency  exchange  rates or by reason  of fees,  indemnities  and  compensation
payable thereunder;

        (o)  additional  Indebtedness  of the  Company or any of its  Restricted
Subsidiaries  in an aggregate  principal  amount at any time  outstanding not to
exceed the greater of (i) $10.0  million or (ii) 5.0% of  Adjusted  Consolidated
Net Tangible Assets of the Company; and

        (p) Indebtedness outstanding on the Series A/B Issue Date.

        "Permitted  Industry   Investments"  means  (i)  capital   expenditures,
including, without limitation,  acquisitions of Company Properties and interests
therein;  (ii) (a) entry into  operating  agreements,  joint  ventures,  working
interests,  royalty interests,  mineral leases, unitization agreements,  pooling
arrangements or other similar or customary agreements, transactions, properties,
interests or  arrangements,  and  Investments  and  expenditures  in  connection
therewith or pursuant thereto, in each case made or entered into in the ordinary
course of the oil and gas business,  and (b) exchanges of Company Properties for
other  Company  Properties  of at least  equivalent  value as determined in good
faith by the Board of Directors of the Company;  (iii)  Investments of operating
funds on behalf of  co-owners  of Crude Oil and  Natural Gas  Properties  of the
Company or the Subsidiaries pursuant to joint operating agreements.

        "Permitted  Investments"  means (a)  Investments  by the  Company or any
Restricted  Subsidiary  in any Person that is or will become  immediately  after
such Investment a Restricted  Subsidiary or that will merge or consolidate  into
the  Company or a  Restricted  Subsidiary  that is not  subject  to any  Payment
Restriction,  (b)  Investments  in the  Company  by any  Restricted  Subsidiary;
provided,  however, that any Indebtedness evidencing any such Investment held by
a  Restricted  Subsidiary  that is not a Subsidiary  Guarantor is unsecured  and
subordinated,  pursuant to a written  agreement,  to the  Company's  obligations
under the Notes and the Indenture; (c) investments in cash and Cash Equivalents;
(d) Investments  made by the Company or its Restricted  Subsidiaries as a result
of  consideration  received in connection  with an Asset Sale made in compliance
with "--  Certain  Covenants  --  Limitation  on  Asset  Sales"  above;  and (e)
Permitted Industry Investments.

        "Permitted Liens" means each of the following types of Liens:

        (a) Liens  existing as of the Series A/B Issue Date to the extent and in
the  manner  such  Liens  were in effect on the  Series  A/B Issue Date (and any
extensions, replacements or renewals thereof covering property or assets secured
by such Liens on the Series A/B Issue Date);

        (b) Liens securing  Indebtedness  outstanding  under the Credit Facility
and Liens arising under the Indenture or the Series A/B Indenture;

        (c) Liens securing the Notes and the Guarantees;

        (d) Liens of the  Company or a  Restricted  Subsidiary  on assets of any
Restricted Subsidiary;

        (e)  Liens  securing  Refinancing  Indebtedness  which  is  incurred  to
Refinance any Indebtedness  which has been secured by a Lien permitted under the
Indenture and which has been incurred in accordance  with the  provisions of the
Indenture;  provided,  however, that such Liens (x) are no less favorable to the
Holders and are not more favorable to the lienholders with respect to such Liens
than the Liens in respect of the  Indebtedness  being  Refinanced and (y) do not
extend  to or  cover  any  property  or  assets  of  the  Company  or any of its
Restricted Subsidiaries not securing the Indebtedness so Refinanced;

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<PAGE>

        (f) Liens for  taxes,  assessments  or  governmental  charges  or claims
either  (i) not  delinquent  or (ii)  contested  in good  faith  by  appropriate
proceedings and as to which the Company or a Restricted Subsidiary,  as the case
may be,  shall  have set aside on its books  such  reserves  as may be  required
pursuant to GAAP;

        (g) statutory and contractual  Liens of landlords to secure rent arising
in the  ordinary  course of business to the extent such Liens relate only to the
tangible  property of the lessee which is located on such  property and Liens of
carriers, warehousemen,  mechanics, suppliers, materialmen,  repairmen and other
Liens  imposed by law incurred in the  ordinary  course of business for sums not
yet  delinquent  or being  contested  in good  faith,  if such  reserve or other
appropriate provision, if any, as shall be required by GAAP shall have been made
in respect thereof;

        (h) Liens  incurred or deposits made in the ordinary  course of business
(i) in connection with workers'  compensation,  unemployment insurance and other
types of social  security,  including any Lien securing letters of credit issued
in the ordinary  course of business  consistent with past practice in connection
therewith, or (ii) to secure the performance of tenders,  statutory obligations,
surety and appeal bonds, bids,  leases,  government  contracts,  performance and
return-of-money  bonds and other similar  obligations  (exclusive of obligations
for the payment of borrowed money);

        (i)  judgment  and  attachment  Liens  not  giving  rise to an  Event of
Default;

        (j)   easements,   rights-of-way,   zoning   restrictions,   restrictive
covenants,   minor   imperfections   in  title  and  other  similar  charges  or
encumbrances in respect of real property not interfering in any material respect
with  the  ordinary  conduct  of  the  business  of  the  Company  or any of its
Restricted Subsidiaries;

        (k) any  interest  or title  of a lessor  under  any  Capitalized  Lease
Obligation;  provided  that such Liens do not extend to any  property  or assets
which is not leased property subject to such Capitalized Lease Obligation;

        (l) Liens  securing  Purchase Money  Indebtedness  of the Company or any
Restricted   Subsidiary;   provided,   however,  that  (i)  the  Purchase  Money
Indebtedness  shall not be secured by any  property  or assets of the Company or
any  Restricted  Subsidiary  other than the  property  and assets so acquired or
constructed and (ii) the Lien securing such Indebtedness shall be created within
90 days of such acquisition or construction;

        (m) Liens securing reimbursement  obligations with respect to commercial
letters of credit which encumber  documents and other property  relating to such
letters of credit and products and proceeds thereof;

        (n) Liens encumbering  deposits made to secure obligations  arising from
statutory,  regulatory,  contractual, or warranty requirements of the Company or
any of its Restricted Subsidiaries, including rights of offset and set-off;

        (o)  Liens  securing  Interest  Swap  Obligations  which  Interest  Swap
Obligations  relate  to  Indebtedness  that is  otherwise  permitted  under  the
Indenture and Liens securing Crude Oil and Natural Gas Hedge Agreements;

        (p) Liens securing Acquired Indebtedness incurred in accordance with "--
Certain Covenants -- Limitation on Incurrence of Additional Indebtedness" above;
provided, however, that (i) such Liens secured such Acquired Indebtedness at the
time of and prior to the incurrence of such Acquired Indebtedness by the Company
or a  Restricted  Subsidiary  and were not  granted in  connection  with,  or in
anticipation of, the incurrence of such Acquired  Indebtedness by the Company or
a  Restricted  Subsidiary  and (ii)  such  Liens do not  extend  to or cover any
property or assets of the Company or of any of its Restricted Subsidiaries other
than the property or assets that secured the Acquired  Indebtedness prior to the
time  such  Indebtedness  became  Acquired  Indebtedness  of  the  Company  or a
Restricted  Subsidiary and are no more favorable to the  lienholders  than those
securing the Acquired  Indebtedness  prior to the  incurrence  of such  Acquired
Indebtedness by the Company or a Restricted Subsidiary;

        (q) Liens on, or related  to,  properties  and assets of the Company and
its  Subsidiaries  to secure all or a part of the costs incurred in the ordinary
course  of  business  of   exploration,   drilling,   development,   production,
processing, transportation, marketing or storage, or operation thereof;

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<PAGE>

        (r) Liens on pipeline or pipeline facilities, Hydrocarbons or properties
and assets of the Company and its  Subsidiaries  which arise out of operation of
law;

        (s) royalties,  overriding  royalties,  revenue  interests,  net revenue
interests,  net profit interests,  revisionary  interests,  production payments,
production sales contracts,  operating  agreements and other similar  interests,
properties, arrangements and agreements, all as ordinarily exist with respect to
Properties  and assets of the Company and its  Subsidiaries  or otherwise as are
customary in the oil and gas business;

        (t) with  respect to any  Properties  and assets of the  Company and its
Subsidiaries,  Liens  arising  under,  or in  connection  with,  or related  to,
farm-out,  farm-in,  joint operation,  area of mutual interest agreements and/or
other  similar or  customary  arrangements,  agreements  or  interests  that the
Company  or any  Subsidiary  determines  in good faith to be  necessary  for the
economic development of such Property;

        (u) any (a) interest or title of a lessor or sublessor  under any lease,
(b)  restriction  or  encumbrance  that the  interest or title of such lessor or
sublessor may be subject to  (including,  without  limitation,  ground leases or
other prior leases of the demised  premises,  mortgages,  mechanics'  liens, tax
liens,  and easements),  or (c)  subordination  of the interest of the lessee or
sublessee under such lease to any restrictions or encumbrance referred to in the
preceding clause (b);

        (v)  Liens in  favor of  collecting  or  payor  banks  having a right of
setoff, revocation, refund or chargeback with respect to money or instruments of
the Company or any  Restricted  Subsidiary  on deposit with or in  possession of
such bank; and

        (w) Liens securing Non-recourse Indebtedness.

        "Permitted  Operating  Obligations" means Indebtedness of the Company or
any Restricted  Subsidiary in respect of one or more standby  letters of credit,
bid, performance or surety bonds, or other reimbursement obligations, issued for
the account of, or entered into by, the Company or any Restricted  Subsidiary in
the ordinary course of business  (excluding  obligations related to the purchase
by the  Company  or any  Restricted  Subsidiary  of  Hydrocarbons  for which the
Company or such Restricted  Subsidiary has contracts to sell), or in lieu of any
thereof  or in  addition  to any  thereto,  guarantees  and  letters  of  credit
supporting any such  obligations and  Indebtedness (in each case, other than for
an obligation for borrowed money,  other than borrowed money  represented by any
such  letter of  credit,  bid,  performance  or surety  bond,  or  reimbursement
obligation itself, or any guarantee and letter of credit related thereto).

        "Person" means an individual, partnership,  corporation,  unincorporated
organization,  limited liability company,  trust, estate, or joint venture, or a
governmental agency or political subdivision thereof.

        "Preferred  Stock" of any Person means any Capital  Stock of such Person
that has  preferential  rights to any other  Capital  Stock of such  Person with
respect to dividends or redemptions or upon liquidation.

        "Property"  means,  with  respect to any Person,  any  interests of such
Person in any kind of property or asset,  whether  real,  personal or mixed,  or
tangible  or  intangible,   including,   without   limitation,   Capital  Stock,
partnership  interests  and other  equity or  ownership  interests  in any other
Person.

        "Purchase Money  Indebtedness"  means  Indebtedness  the net proceeds of
which are used to  finance  the cost  (including  the cost of  construction)  of
property  or assets  acquired  in the normal  course of  business  by the Person
incurring such Indebtedness.

        "Qualified   Capital   Stock"  means  any  Capital  Stock  that  is  not
Disqualified Capital Stock.

        "Reference  Date" has the meaning set forth under "-- Certain  Covenants
- -- Limitation on Restricted Payments."

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<PAGE>

        "Refinance"  means,  in  respect of any  security  or  Indebtedness,  to
refinance,  extend, renew, refund, repay, prepay,  redeem, defease or retire, or
to issue a security  or  Indebtedness  in  exchange  or  replacement  for,  such
security or Indebtedness  in whole or in part.  "Refinanced"  and  "Refinancing"
shall have correlative meanings.

        "Refinancing  Indebtedness"  means any Refinancing by the Company or any
Restricted Subsidiary of the Company of Indebtedness incurred in accordance with
"-- Certain  Covenants  --Limitation  on Incurrence of Additional  Indebtedness"
above (other than  pursuant to clause (b),  (c),  (d),  (e), (f), (g), (j), (k),
(l), (n) or (o) of the definition of Permitted Indebtedness),  in each case that
does  not (i)  result  in an  increase  in the  aggregate  principal  amount  of
Indebtedness  of such Person as of the date of such proposed  Refinancing  (plus
the amount of any premium  required to be paid under the terms of the instrument
governing such Indebtedness and plus the amount of reasonable  expenses incurred
by  the  Company  and  its  Restricted  Subsidiaries  in  connection  with  such
Refinancing)  or (ii) create  Indebtedness  with (x) a Weighted  Average Life to
Maturity  that is less  than  the  Weighted  Average  Life  to  Maturity  of the
Indebtedness  being  Refinanced or (y) a final  maturity  earlier than the final
maturity of the Indebtedness being Refinanced;  provided,  however,  that (1) if
such  Indebtedness  being  Refinanced  is  Indebtedness  of  the  Company  or  a
Subsidiary Guarantor,  then such Refinancing  Indebtedness shall be Indebtedness
solely  of the  Company  and/or  such  Subsidiary  Guarantor  and  (2)  if  such
Indebtedness  being  Refinanced  is  subordinate  or  junior  to the  Notes or a
Guarantee,  then such Refinancing Indebtedness shall be subordinate to the Notes
or such  Guarantee,  as the case may be, at least to the same  extent and in the
same manner as the Indebtedness being Refinanced.

        "Registration  Rights Agreement" means the Registration Rights Agreement
dated as of the Issue Date among the Issuers and the Initial Purchaser.

        "Related  Person"  of any  Person  means any other  Person  directly  or
indirectly  owning 10% or more of the  outstanding  voting  Common Stock of such
Person (or, in the case of a Person  that is not a  corporation,  10% or more of
the equity interest in such Person).

        "Replacement  Assets"  has the  meaning  set  forth  under  "--  Certain
Covenants -- Limitation on Asset Sales."

        "Restricted  Payment"  has the  meaning  set  forth  under  "--  Certain
Covenants -- Limitation on Restricted Payments."

        "Restricted  Subsidiary" means any Subsidiary of the Company (including,
without limitation,  Canadian Abraxas) that has not been designated by the Board
of Directors of the Company, by a Board Resolution  delivered to the Trustee, as
an  Unrestricted  Subsidiary  pursuant  to and in  compliance  with "--  Certain
Covenants -- Limitation on Restricted and Unrestricted  Subsidiaries" above. Any
such designation may be revoked by a Board  Resolution of the Company  delivered
to the Trustee, subject to the provisions of such covenant.

        "Sale  and   Leaseback   Transaction"   means  any  direct  or  indirect
arrangement  with any Person or to which any such  Person is a party,  providing
for the  leasing to the  Company or a  Restricted  Subsidiary  of any  property,
whether  owned by the  Company or any  Restricted  Subsidiary  at the Series A/B
Issue Date or later  acquired  which has been or is to be sold or transferred by
the Company or such Restricted  Subsidiary to such Person or to any other Person
from whom funds have been or are to be advanced  by such Person on the  security
of such property.

        "Series A/B  Indenture"  means the  Indenture  dated as of November  14,
1996,  among the  Issuers and IBJ  Schroder  Bank & Trust  Company,  as Trustee,
providing  for the issuance of the Series A/B Notes in the  aggregate  principal
amount of  $215,000,000,  as such may be amended and  supplemented  from time to
time.

        "Series  A/B Issue  Date"  means the date on which the  Series A/B Notes
were originally issued under the Series A/B Indenture.

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<PAGE>

        "Series A/B Notes"  means the  Issuers'  11 1/2%  Senior  Notes due 2004
issued  pursuant  to the  Series  A/B  Indenture,  as  such  may be  amended  or
supplemented from time to time.

        "Subsidiary",  with respect to any Person,  means (a) any corporation of
which the  outstanding  Capital  Stock  having at least a majority  of the votes
entitled to be cast in the election of directors  under  ordinary  circumstances
shall at the time be owned,  directly or  indirectly,  by such Person or (b) any
other Person of which at least a majority of the voting interests under ordinary
circumstances is at the time, directly or indirectly, owned by such Person.

        "Subsidiary   Guarantor"   means  each  of  the   Company's   Restricted
Subsidiaries that in the future executes a supplemental  indenture in which such
Restricted  Subsidiary  agrees  to be bound by the terms of the  Indenture  as a
Subsidiary  Guarantor;   provided,  however,  that  any  Person  constituting  a
Subsidiary  Guarantor as described  above shall cease to constitute a Subsidiary
Guarantor  when its  Guarantee is released in  accordance  with the terms of the
Indenture.

        Surviving  Entity has the meaning set forth under "-- Certain  Covenants
- -- Merger, Consolidation and Sale of Assets."

        "Unadjusted  Net Proceeds  Offer Amount" has the meaning set forth under
"-- Certain Covenants -- Limitation on Asset Sales."

        "Unrestricted Subsidiary" means any Subsidiary of the Company designated
as such pursuant to and in compliance  with "-- Certain  Covenants -- Limitation
on Restricted and Unrestricted  Subsidiaries"  above;  provided,  however,  that
Unrestricted  Subsidiaries  shall  initially  include Cascade Oil & Gas Ltd., an
Alberta, Canada corporation,  and Western Associated Energy Corporation, a Texas
corporation.  Any such  designation may be revoked by a Board  Resolution of the
Company delivered to the Trustee, subject to the provisions of such covenant.

        "Weighted   Average  Life  to  Maturity"  means,  when  applied  to  any
Indebtedness  at any date, the number of years obtained by dividing (a) the then
outstanding  aggregate principal amount of such Indebtedness into (b) the sum of
the total of the products  obtained by  multiplying  (i) the amount of each then
remaining  installment,  sinking fund, serial maturity or other required payment
of principal,  including payment at final maturity,  in respect thereof, by (ii)
the number of years  (calculated to the nearest  one-twelfth)  which will elapse
between such date and the making of such payment.

        "Wholly Owned Restricted  Subsidiary" means any Restricted Subsidiary of
which all the outstanding  voting  securities  normally  entitled to vote in the
election  of  directors  are  owned  by the  Company  or  another  Wholly  Owned
Restricted Subsidiary.


          CERTAIN UNITED STATES AND CANADIAN INCOME TAX CONSIDERATIONS

        The  discussion  below is  intended to be a general  description  of the
material  United States and Canadian tax  consequences  of the Exchange Offer to
holders of the Notes. In addition,  the discussion  describes,  in general,  the
material  United  States  and  Canadian  tax  consequences  associated  with the
acquisition,  ownership  and  disposition  of the  Notes.  It does not take into
account the individual  circumstances  of any  particular  investor and does not
purport to discuss all of the possible tax consequences of the Exchange Offer or
the ownership or disposition of the Notes and is not intended as tax advice. The
summary  below is general in nature and does not  discuss  all aspects of United
States  and  Canadian  income  taxation  that may be  relevant  to a  particular
investor in the light of the investor's particular circumstances.

Certain U.S. Federal Income Tax Considerations

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<PAGE>

        The following is a summary of certain  United States  federal income tax
consequences  related  to  the  Exchange  Offer  and  the  associated  with  the
acquisition, ownership, and disposition of the Notes. The following summary does
not discuss all of the aspects of federal  income  taxation that may be relevant
to a  prospective  holder  of the  Notes  in  light  of  his  or her  particular
circumstances,  or to  certain  types of  holders  which are  subject to special
treatment  under the  federal  income tax laws  (including  persons who hold the
Notes  as part of a  conversion,  straddle  or  hedge,  dealers  in  securities,
insurance   companies,   tax-exempt   organizations,   financial   institutions,
broker-dealers  and S  corporations).  Further,  this summary  pertains  only to
holders  that are  citizens or  residents  of the United  States,  corporations,
partnerships or other entities created in or under the laws of the United States
or any political  subdivision  thereof, or estates or trusts the income of which
is subject to United States federal income taxation regardless of its source. In
addition,  this  summary does not  describe  any tax  consequences  under state,
local, or foreign tax laws.

        This summary is based upon the Internal Revenue Code of 1986, as amended
(the   "Code"),   Treasury   Regulations   (the   "Regulations"),   rulings  and
pronouncements  issued by the  Internal  Revenue  Service  ("IRS") and  judicial
decisions  now in  effect,  all of which  are  subject  to change at any time by
legislative,  judicial or administrative action. Any such changes may be applied
retroactively  in a manner that could adversely affect the holders of the Notes.
The  Issuers  have not  sought  and will  not seek any  rulings  from the IRS or
opinions from counsel with respect to the matters discussed below.  There can be
no  assurance  that  the  IRS  will  not  take  positions   concerning  the  tax
consequences  of the Exchange  Offer or the  valuation,  purchase,  ownership or
disposition of the Notes which are different from those discussed herein.

Tax Consequences of the Exchange Offer

        An  exchange  of the  Series  B Notes  and the  Series  C Notes  for the
Exchange  Notes  pursuant  to the  Exchange  Offer  should  not be  treated as a
significant  modification of the Series B Notes or Series C Notes;  accordingly,
an Exchange Note should be treated as a continuation of the corresponding Series
B Note or Series C Note and an  exchanging  holder should not recognize any gain
or loss as a result of  participating  in the Exchange  Offer.  In addition,  an
exchanging  Holder's  basis in an Exchange  Note should be equal to the basis of
the  corresponding  Series B Note or Series C Note and the holding period for an
Exchange Note would include such holder's  holding period for the  corresponding
Series B Note or Series C Note.

        The Exchange Offer will not have any federal income tax  consequences to
a non-exchanging holder.

        Each  exchanging  holder should  consult with his or her  individual tax
advisor concerning any foreign,  state or local tax consequences of the Exchange
Offer as well as to the effect of his or her particular facts and  circumstances
on the matters discussed herein.

Taxation of Accrued Stated Interest on Notes

        Accrued  stated  interest paid on a Note will  generally be taxable to a
holder as ordinary  interest  income at the time it accrues or is  received,  in
accordance with the holder's regular method of accounting for federal income tax
purposes.

        The Company will annually furnish to certain record holders of the Notes
and the IRS information with respect to any stated interest  accruing during the
calendar year as may be required under applicable Regulations.

Market Discount

        If a holder purchases a Note, other than in connection with the original
offering of the Series C Notes or the Exchange  Offer,  for less than the stated
redemption price of the Note at maturity,  the difference is considered  "market
discount," unless such difference is "de minimis," i.e., less than one-fourth of
one percent of the stated redemption price of the Note at maturity multiplied by
the number of complete years to maturity  (after the holder  acquires the Note).
Under  market  discount  rules,  any gain  realized  by the  holder on a taxable
disposition of a Note having "market discount," as well as any partial principal
payment made with respect to such a Note,  will be treated as ordinary income to


                                       92
<PAGE>

the  extent  of the then  "accrued  market  discount"  of the  Note.  The  rules
concerning  the  calculation of "accrued  market  discount" are set forth in the
paragraph  immediately  below.  In  addition,  a  holder  of such a Note  may be
required to defer the  deduction of all or a portion of the interest  expense on
any indebtedness incurred to purchase or carry a Note having "market discount."

        Any market  discount will accrue ratably from the date of acquisition to
the maturity date of the Note, unless the holder elects,  irrevocably, to accrue
market discount on a constant  interest rate method.  The constant interest rate
method  generally  accrues  interest at times and in amounts  equivalent  to the
result which would have occurred had the market  discount  been  original  issue
discount computed from the date of the holder's  acquisition of the Note through
the maturity date. The election to accrue market discount on a constant interest
rate method is  irrevocable  but may be made  separately as to each Note held by
the holder.

        Accrual  of market  discount  will not cause the  accrued  amounts to be
included currently in a holder's taxable income, in the absence of a disposition
of, or  principal  payment  on,  the Note.  Nevertheless,  a holder may elect to
currently include market discount in income as it accrues on either a ratable or
constant interest rate method.  In such event,  interest expense relating to the
acquisition  of a Note which  would  otherwise  be deferred  would be  currently
deductible  to the extent  otherwise  permitted  by the Code.  The  election  to
include market discount in income  currently,  once made,  applies to all market
discount  obligations  acquired  by such holder on or after the first day of the
first taxable year to which the election applies and all subsequent years unless
revoked with the consent of the IRS.  Accrued market  discount which is included
in a holder's  gross income will  increase the adjusted tax basis of the Note in
the hands of the holder.

Acquisition Premium

        If a  subsequent  holder  acquires a Note for an amount which is greater
than the stated  redemption  price of the Note at maturity,  such holder will be
considered to have purchased such Note with  "amortizable bond premium" equal to
the amount of such excess.  The holder may elect to amortize the premium using a
constant yield method  employing six month  compounding over the period from the
acquisition  date to the  maturity  date of the Note.  Amortized  amounts may be
offset only against  interest  paid with respect to the Note and will reduce the
holder's  adjusted  tax basis in the Note to the extent so used.  Once made,  an
election to amortize  and offset  interest on the Note may be revoked  only with
the  consent  of the IRS and will  apply to all Notes  held by the holder on the
first day of the taxable  year to which the election  relates and to  subsequent
taxable years and to all Notes subsequently acquired by the holder.

Sale, Exchange or Other Taxable Disposition of the Notes

        The sale,  redemption or other taxable disposition of a Note will result
in the  recognition  of gain or loss to the  holder  in an  amount  equal to the
difference  between  (i) the amount of cash and fair  market  value of  property
received  (except to the extent  attributable  to the payment of accrued  stated
interest) in exchange therefore and (ii) the holder's adjusted tax basis in such
Note.  A holder's  initial tax basis in a Note  purchased by such holder will be
equal to the issue price of the Note.

        Any gain or loss on the sale, redemption or other taxable disposition of
a Note will be capital gain or loss, except to the extent of any "accrued market
discount,"  assuming a purchaser  of the Note holds such  security as a "capital
asset"  (generally  property held for investment)  within the meaning of Section
1221 of the Code.  Any capital  gain or loss will be  long-term  capital gain or
loss if the Note is held for more than one year and otherwise will be short-term
capital gain or loss.  Payments on such  disposition for accrued stated interest
not previously included in income will be treated as ordinary interest income.

Purchase or Redemption of Notes

        Effect of Change of Control  and Asset  Sale.  Upon a Change of Control,
the Issuers are  required to offer to redeem all  outstanding  Notes for a price
equal to 101% of the  principal  amount  thereof plus accrued and unpaid  stated
interest.  See  "Description  of the Exchange  Notes --  Redemption  -- Optional


                                       93
<PAGE>

Redemption."  Under  the  Regulations,  such  a  Change  of  Control  redemption
requirement  will not affect  the yield or  maturity  date of the Notes  unless,
based on all the facts and circumstances as of the issue date, it is more likely
than not that a Change of Control giving rise to the redemption will occur. Upon
certain asset sales,  the Issuers will be obligated to offer to  repurchase  the
Notes at one hundred percent (100%) of the principal amount thereof plus accrued
and unpaid  interest to the date of  redemption.  The Issuers will not treat the
Change  of  Control  or the asset  sale  redemption  provisions  of the Notes as
affecting the calculation of the yield to maturity of any Note.

        Optional  Redemption.  The Issuers,  at their option, may redeem part or
all of the Notes at any time on or after  November  1, 2000,  at the  redemption
prices set forth  herein.  In  addition,  if the  Issuers  consummate  an Equity
Offering on or before  November 1, 1999,  the Issuers may, at their option,  use
all or a portion  of the  proceeds  from such  Equity  Offering  to redeem up to
thirty-five  percent  (35%)  of the  aggregate  principal  amount  of the  Notes
originally  issued  in the  Offering  at a  redemption  price  equal to  111.5%,
together with accrued and unpaid  interest to the date of redemption;  provided,
however,  that, after giving effect to any such redemption,  at least 65% of the
aggregate  principal  amount of the Series C Notes and  Exchange  Notes  remains
outstanding.  See  "Description  of the Exchange Notes  --Redemption -- Optional
Redemption." For purposes of determining whether the Series C Notes and Exchange
Notes are issued with any "original issue  discount," the Regulations  generally
provide  that an issuer  will be treated as  exercising  any such  option if its
exercise would lower the yield of the debt instrument.  A redemption of Notes at
the optional redemption prices, however, would increase rather than decrease the
effective yield of the debt instrument as calculated from the issue date.

        The  Issuers do not  currently  intend to  exercise  any of the  options
described above with respect to the Notes. Should the Issuers exercise an option
and redeem a Note,  the holder of the Note would be required to treat any amount
paid by the Issuers  which  exceeds the Note's  then  principal  balance and all
accrued and unpaid  interest  thereon as an amount  received in exchange for the
Note.

Backup Withholding

        The backup  withholding  rules  require a payor to deduct and withhold a
tax if (i) the payee fails to properly furnish a taxpayer  identification number
("TIN") to the payor,  (ii) the IRS notifies the payor that the TIN furnished by
the  payee is  incorrect,  (iii) the payee  has  failed to report  properly  the
receipt  of  "reportable  payments"  and the IRS has  notified  the  payor  that
withholding  is  required,  or (iv)  there  has been a  failure  of the payee to
certify  under a penalty of perjury  that a payee is not subject to  withholding
under Section 3406 of the Code. As a result,  if any one of the events discussed
above occurs with respect to a holder of Notes, the Company, its paying agent or
other  withholding  agent will be required to withhold a tax equal to 31% of any
"reportable  payment"  made in  connection  with  the  Notes to such  holder.  A
"reportable  payment" includes,  among other things,  amounts paid in respect of
interest  or  original  issue  discount  and  amounts  paid  through  brokers in
retirement of securities.  Any amounts withheld from a payment to a holder under
the backup  withholding rules will be allowed as a refund or credit against such
holder's  federal  income  tax,  provided,  that  the  required  information  is
furnished to the IRS. Certain holders (including, among others, corporations and
certain  tax-exempt  organizations)  are not  subject to the backup  withholding
rules.

Certain Canadian Federal Income Tax Considerations

        The  following  is, as of the date  hereof,  a summary of the  principal
Canadian  federal  income  tax  consequences  of the  Exchange  Offer,  and  the
ownership and  disposition of the Exchange  Notes, to a holder of Series B Notes
or Series C Notes who, for  purposes of the Income Tax Act (Canada)  (the "ITA")
and any relevant  bilateral tax treaty and at all relevant times, deals at arm's
length with Canadian Abraxas, holds the Notes as capital property, is not and is
not deemed to be a resident in Canada, does not use or hold and is not deemed to
use or hold the Notes in  carrying  on  business in Canada and is not an insurer
carrying on an  insurance  business  in Canada and  elsewhere  (a  "Non-Resident
Holder").  For the purposes of the ITA, related persons (as therein defined) are
deemed  not to deal at arm's  length.  This  summary  is  based  on the  current
provisions  of the ITA and the  regulations  thereunder,  the current  published
administrative  practices of Revenue Canada, and all specific proposals to amend
the ITA and the regulations  announced by or on behalf of the Canadian  Minister
of Finance prior to the date hereof.  This summary does not otherwise  take into


                                       94
<PAGE>

account or anticipate  changes in the law, whether by judicial,  governmental or
legislative decision or action, nor does it take into account tax legislation or
considerations of any province or territory of Canada or any jurisdiction  other
than Canada.  The  provisions of  provincial  income tax  legislation  vary from
province to province in Canada and in some cases differ from federal  income tax
legislation. This summary is of a general nature only and is not intended to be,
and should not be interpreted  as, legal or tax advice to any particular  holder
of Notes.

        No taxes will be payable  under the ITA in  respect of the  exchange  of
Series B Notes or Series C Notes for  Exchange  Notes by a  Non-Resident  Holder
pursuant to the Exchange Offer.

        The payment by Canadian  Abraxas of interest,  principal or premium,  if
any, on the Exchange Notes to a Non-Resident Holder will be exempt from Canadian
withholding tax.

        No other  taxes on income  (including  taxable  capital  gains)  will be
payable under the ITA in respect of the holding,  redemption or  disposition  of
the Exchange Notes by a Non-Resident Holder.

                                       95
<PAGE>

                          BOOK-ENTRY; DELIVERY AND FORM

        The Certificates representing the Exchange Notes will be issued in fully
registered  form,  without  coupons and will be deposited with, or on behalf of,
the  Depositary,  and registered in the name of Cede & Co., as the  Depository's
nominee,  in the  form  of a  global  Exchange  Note  certificate  (the  "Global
Certificate") or will remain in the custody of the Trustee.

        Except as set forth below, the Global Certificate may be transferred, in
whole and not in part,  only by the Depositary to its nominee to such Depositary
or another  nominee of the  Depositary or by the  Depositary or its nominee to a
successor of the Depositary or a nominee of such successor.

        The Issuers  understand that the Depositary is a  limited-purpose  trust
company which was created to hold securities for its participating organizations
(the   "Participants")  and  to  facilitate  the  clearance  and  settlement  of
transactions  in  such  securities  between   Participants   through  electronic
book-entry  changes  in  accounts  of  its  Participants.  Participants  include
securities brokers and dealers (including the Initial Purchasers),  banks, trust
companies, clearing corporations and certain other organizations.  Access to the
Depository'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  ("indirect
participants"). Persons who are not participants may beneficially own securities
held by the Depositary through Participants or indirect participants.

        Pursuant to procedures established by the Depositary (i) upon deposit of
the Global Certificate,  the Depositary will credit the accounts of Participants
with  portions  of the  principal  amount  of the  Global  Certificate  and (ii)
ownership of the Exchange  Notes will be shown on, and the transfer of ownership
thereof will be effected only  through,  records  maintained  by the  Depositary
(with  respect  to  the  interest  on  the   Depository's   participants),   the
Depository's Participants and the Depository's indirect participants.

        The  laws  of some  jurisdictions  require  that  certain  persons  take
physical delivery in definitive form of securities that they own.  Consequently,
the ability to transfer  interests in the Global  Certificate will be limited to
such extent.

        So long as the nominee of the Depositary is the registered  owner of the
Global Certificate,  such nominee will be considered the sole owner or holder of
the Exchange  Notes for all  purposes  under the  Indenture.  Except as provided
below, the owners of interests in the Global Certificate will not be entitled to
have Exchange Notes  registered in their names,  will not receive or be entitled
to receive  physical  delivery of Exchange Notes in definitive form and will not
be considered the owners or holders  thereof under the  Indenture.  As a result,
the  ability  of a  person  having  a  beneficial  interest  in  Exchange  Notes
represented  by the Global  Certificate  to pledge  such  interest to persons or
entities that do not participate in the Depository's system or to otherwise take
actions in respect to such  interest  may be  affected by the lack of a physical
certificate evidencing such interest.

        Neither the  Issuers,  the  Trustee  nor any paying  agent will have any
responsibility  or  liability  for any  aspect  of the  records  relating  to or
payments  made  on  account  of  interests  in  the  Global  Certificate  or for
maintaining, supervising or reviewing any records relating to such interests.

        Principal and interest payments on the Global Certificate  registered in
the name of the  Depository's  nominee  will be made by the Issuers or through a
paying agent to the  Depository's  nominee as the registered owner of the Global
Certificate.  Under the terms of the Indenture, the Issuers and the Trustee will
treat the persons in whose names the Exchange Notes are registered as the owners
of such  Exchange  Notes for the purpose of receiving  payments of principal and
interest  on  such  Exchange  Notes  and  for  all  other  purposes  whatsoever.
Therefore,  neither the Issuers, the Trustee nor any paying agent has any direct
responsibility  or  liability  for the payment of  principal  or interest on the
Exchange Notes to owners of interests in the Global Certificate.  The Depositary
has  advised the Issuers  and the  Trustee  that its present  practice  is, upon
receipt of any payment of  principal  or  interest,  to credit  immediately  the
account of the  Participants  with  payments in amounts  proportionate  to their
respective  holdings in principal amount of interests in the Global  Certificate
as shown on the records of the Depositary. Payments by Participants and indirect
participants to owners of interests in the Global  Certificate  will be governed


                                       96
<PAGE>

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  responsibility  of such participants or indirect
participants.

        If the  Depositary  is at any time  unwilling  or unable to  continue as
depositary and a successor  depositary is not appointed by the Issuers within 90
calendar days, the Issuers will issue  Exchange  Notes in  certificated  form in
exchange for the Global  Certificate.  In addition,  the Issuers may at any time
determine not to have the Exchange Notes  represented  by a Global  Certificate,
and, in such event,  will issue Exchange Notes in certificated  form in exchange
for the Global Certificate.  In either instance,  an owner of an interest in the
Global Certificate would be entitled to physical delivery of such Exchange Notes
in  certificated  form.  Exchange Notes so issued in  certificated  form will be
issued in  denominations  of $1,000 and integral  multiples  thereof and will be
issued in registered form only.

        Neither the Issuers nor the Trustee shall be liable for any delay by the
Depositary or its nominee in identifying  the  beneficial  owners or the related
Exchange  Notes,  and each such  person may  conclusively  rely on, and shall be
protected in relying on, instructions from the Depositary or its nominee for all
purposes  (including  with respect to the  registration  and  delivery,  and the
respective principal amounts, of the Exchange Notes to be issued).

                                       97
<PAGE>


                              AVAILABLE INFORMATION

        The Issuers have filed with the Commission a  Registration  Statement on
Form  S-4  (the  "Exchange  Offer  Registration  Statement",  which  term  shall
encompass all amendments,  exhibits,  annexes and schedules thereto) pursuant to
the  Securities  Act and  the  rules  and  regulations  promulgated  thereunder,
covering the Exchange  Notes being  offered  hereby.  This  Prospectus  does not
contain  all the  information  set  forth  in the  Exchange  Offer  Registration
Statement.  For further information with respect to the Issuers and the Exchange
Offer,  reference  is  made  to  the  Exchange  Offer  Registration   Statement.
Statements made in this Prospectus as to the contents of any contract, agreement
or other document referred to are not necessarily complete. With respect to each
such  contract,  agreement or other document filed as an exhibit to the Exchange
Offer  Registration  Statement,  reference  is  made to the  exhibit  for a more
complete description of the document or matter involved, and each such statement
shall be deemed qualified in its entirety by such reference.  The Exchange Offer
Registration  Statement,  including the exhibits  thereto,  can be inspected and
copied at the public reference  facilities  maintained by the Commission at Room
1024,  450 Fifth  Street,  N.W.,  Washington,  D.C.  20549,  and at the Regional
Offices of the Commission at 7 World Trade Center,  New York, New York 10048 and
at Northwestern  Atrium Center,  500 West Madison Street,  Suite 1400,  Chicago,
Illinois  60661.  Copies  of such  materials  can be  obtained  from the  Public
Reference Section of the Commission at 450 Fifth Street, N.W., Washington,  D.C.
20549, at prescribed rates. Such material may also be accessed electronically by
means of the Commission's home page on the Internet at http://www.sec.gov.

        The Company is subject to the  informational  reporting  requirements of
the  Securities  Exchange Act of 1934, as amended (the "Exchange  Act"),  and in
accordance therewith files reports,  proxy and information  statements and other
information  with the  Commission.  Such material  filed by the Company with the
Commission  may be inspected by anyone  without  charge at the Public  Reference
Section of the Commission at Room 1024, Judiciary Plaza, 450 Fifth Street, N.W.,
Washington, D.C. 20549, and at the regional offices of the Commission located at
Northwestern  Atrium  Center,  500 West  Madison  Street,  Suite 1400,  Chicago,
Illinois  60661 and 7 World Trade Center,  Suite 1300, New York, New York 10048.
Copies of such material may also be obtained at the Public Reference  Section of
the  Commission  at  Room  1024,   Judiciary  Plaza,  450  Fifth  Street,  N.W.,
Washington,  D.C.  20549,  upon payment of prescribed  fees. . Such material may
also be accessed  electronically  by means of the Commission's  home page on the
Internet at http://www.sec.gov. The Common Stock of the Company is quoted on The
Nasdaq  National  Market  under the symbol  "AXAS" and such  reports,  proxy and
information   statements  and  other  information  concerning  the  Company  are
available at the offices of The Nasdaq National Market located at 1735 K Street,
N.W., Washington, D.C. 20006.

        In the event that the Company ceases to be subject to the  informational
reporting  requirements  of the Exchange  Act, the Issuers have agreed that,  so
long as the Series B Notes,  the  Series C Notes or the  Exchange  Notes  remain
outstanding, they will file with the Commission and distribute to holders of the
Series B Notes,  Series C Notes or Exchange Notes, as applicable,  copies of the
financial  information  that would have been  contained  in annual  reports  and
quarterly reports,  including management's  discussion and analysis of financial
condition and results of  operations,  that the Company would have been required
to file  with the  Commission  pursuant  to the  Exchange  Act.  Such  financial
information  shall include  annual  reports  containing  consolidated  financial
statements and notes thereto,  together with an opinion thereon  expressed by an
independent  public  accounting  firm, as well as quarterly  reports  containing
unaudited  condensed  consolidated  financial  statements  for the  first  three
quarters of each fiscal year. The Company will also make such reports  available
to  prospective  purchasers  of the Series B Notes,  Series C Notes or  Exchange
Notes, as applicable, securities analysts and broker-dealers upon their request.
In  addition,  the  Issuers  have agreed that for so long as any of the Series B
Notes,  Series C Notes or  Exchange  Notes  remain  outstanding  they  will make
available to any prospective  purchaser of the Series B Notes, Series C Notes or
Exchange  Notes or  beneficial  owner of the  Series B Notes,  Series C Notes or
Exchange Notes in connection with any sale thereof the  information  required by
Rule  144A(d)(4)  under the Securities  Act, until such time as the Issuers have
either  exchanged  the  Series B Notes,  Series C Notes or  Exchange  Notes  for
securities  identical in all material  respects which have been registered under
the  Securities  Act or until such time as the holders  thereof have disposed of
such Series B Notes,  Series C Notes or Exchange  Notes pursuant to an effective
registration statement filed by the Issuers.

                                       98
<PAGE>



           ENFORCEABILITY OF CIVIL LIABILITIES AGAINST FOREIGN PERSONS

        Canadian Abraxas is an Alberta corporation,  certain of its officers and
directors  may be residents of various  jurisdictions  outside the United States
and its Canadian counsel,  Osler,  Hoskin & Harcourtt,  are residents of Canada.
All or a  substantial  portion of the  assets of  Canadian  Abraxas  and of such
persons  may be  located  outside  the  United  States.  As a result,  it may be
difficult  for investors to effect  service of process  within the United States
upon such  persons or to enforce  judgments  obtained  against  such  persons in
United States courts and predicated upon the civil  liability  provisions of the
Securities Act. Notwithstanding the foregoing,  Canadian Abraxas has irrevocably
agreed  that it may be served  with  process  with  respect to actions  based on
offers and sales of securities made hereby in the United States by serving Chris
E. Williford, c/o Abraxas Petroleum Corporation, 500 North Loop 1604 East, Suite
100, San Antonio,  Texas 78232,  Canadian Abraxas' United States agent appointed
for that  purpose.  Canadian  Abraxas has been advised by its Canadian  counsel,
Osler, Hoskin & Harcourt, that there is doubt as to the enforceability in Canada
against Canadian Abraxas or against any of its directors,  controlling  persons,
officers  or experts who are not  residents  of the United  States,  in original
actions for  enforcement  of judgments of United States  courts,  of liabilities
predicated solely upon United States federal securities laws.

                                  LEGAL MATTERS

        Certain  legal  matters  related to the Notes  offered  hereby are being
passed upon for the Company by Cox & Smith Incorporated,  San Antonio, Texas and
for Canadian  Abraxas by Osler,  Hoskin & Harcourt,  Barristers and  Solicitors,
Calgary, Alberta.

                                     EXPERTS

        The consolidated  financial statements of Abraxas Petroleum  Corporation
as of  December  31, 1997 and 1996 and for each of the three years in the period
ended  December  31,  1997  included  in this  Prospectus  and the  Registration
Statement have been audited by Ernst & Young LLP, independent  auditors,  as set
forth in their report thereon appearing  elsewhere  herein,  and are included in
reliance  upon such report  given upon the  authority of such firm as experts in
accounting and auditing.

        The financial statements of CGGS Canadian Gas Gathering Systems Inc. for
the years ended October 31, 1996 and 1995 have been  included  herein and in the
Registration   Statement  in  reliance  upon  the  report  of  KPMG,   Chartered
Accountants,  appearing elsewhere herein, and upon the authority of said firm as
experts in accounting and auditing.

        The historical reserve information  prepared by DeGolyer and MacNaughton
and McDaniel & Associates  Consultants Ltd.  included in this Prospectus and the
Registration  Statement has been included  herein in reliance upon the authority
of such firms as experts  with  respect to  matters  contained  in such  reserve
reports.

                                       99
<PAGE>


                                GLOSSARY OF TERMS

        Unless otherwise  indicated in this Prospectus,  natural gas volumes are
stated at the legal pressure base of the State or area in which the reserves are
located at 60 degrees  Fahrenheit.  Natural gas equivalents are determined using
the ratio of six Mcf of natural  gas to one barrel of crude oil,  condensate  or
NGLs.

        The following  definitions  shall apply to the  technical  terms used in
this Prospectus.

        "Bbl" means barrel or barrels.

        "Bblpd" means barrels per day.

        "Bcf" means billion cubic feet.

        "BOE" means barrel of crude oil equivalent.

        "DD&A" means depletion, depreciation and amortization.

        "Developed  acreage"  means  acreage  which  consists of acres spaced or
assignable to productive wells.

        "Development  well"  means a well  drilled  within the proved  area of a
crude oil or natural gas reservoir to the depth of  stratigraphic  horizon (rock
layer or  formation)  known to be  productive  for the purpose of  extraction of
proved crude oil or natural gas reserves.

        "Dry  hole"  means  an  exploratory  or  development  well  found  to be
incapable  of  producing  either crude oil or gas in  sufficient  quantities  to
justify completion as a crude oil or natural gas well.

        "Exploratory well" means a well drilled to find and produce crude oil or
natural gas in an unproved  area, to find a new reservoir in a field  previously
found to be  producing  crude oil or  natural  gas in another  reservoir,  or to
extend a known reservoir.

        "Finding cost",  expressed in dollars per BOE, is calculated by dividing
the amount of total exploration and development capital expenditures  (excluding
any  amortization  with  respect to  deferred  financing  fees) by the amount of
proved  reserves  added during the same period  (including  the effect on proved
reserves of reserve revisions).

        "G&A" means general and administrative.

        "Gross" natural gas and crude oil wells or "gross" wells or acres is the
number of wells or acres in which the Company has an interest.

        "LOE" means lease operating expenses and production taxes.

        "MBbl" means thousand barrels.

        "MBOE" means thousand barrels of crude oil equivalent.

        "Mcf" means thousand cubic feet.

        "Mcfpd" means thousand cubic feet per day.

        "MMBbls" means million barrels of crude oil.

        "MMBOE" means million barrels of crude oil equivalent.
 

                                    100
<PAGE>

        "MMBTU" means million British Thermal Units.

        "MMcf" means million cubic feet.

        "MMcfpd" means million cubic feet per day.

        "Net"  natural gas and crude oil wells or "net" acres are  determined by
multiplying  "gross"  wells or acres by the Company's  working  interest in such
wells or acres.

        "NGL" means natural gas liquid.

        "PV-10" means estimated future net revenue,  discounted at a rate of 10%
per  annum,  before  income  taxes  and  with no  price  or cost  escalation  or
de-escalation  in accordance with  guidelines  promulgated by the Securities and
Exchange Commission.

        "Production  costs" means lease operating  expenses and taxes on natural
gas and crude oil production.

        "Productive wells" mean producing wells and wells capable of production.

        "Proved developed reserves" includes only those proved reserves expected
to be recovered from existing  completion  intervals in existing wells and those
reserves that exist behind the casing of existing  wells when the cost of making
such reserves  available for production is relatively small compared to the cost
of a new well.

        "Proved  reserves"  or  "reserves"  means  natural  gas and  crude  oil,
condensate and NGLs on a net revenue  interest  basis,  found to be commercially
recoverable.

        "Proved undeveloped reserves" includes those proved reserves expected to
be recovered from new wells on undrilled  acreage or from existing wells where a
relatively major expenditure is required for recompletion.

        "Service Well" is a well used for water injection in secondary  recovery
projects or for the disposal of produced water.

        "Undeveloped  acreage"  means  leased acres on which wells have not been
drilled or completed to a point that would permit the  production  of commercial
quantities of crude oil and natural gas,  regardless whether or not such acreage
contains proved reserves.

                                      101
<PAGE>


<PAGE>


                          INDEX TO FINANCIAL STATEMENTS

                                                                    Page
Abraxas Petroleum Corporation and Subsidiaries

Report of Independent  Auditors                                      F-2
Consolidated  Balance Sheets at December 31,1996 and 1997            F-3 
Consolidated  Statements of Operations for the years ended
  December 31, 1995, 1996, and 1997                                  F-5
Consolidated Statements of Stockholders' Equity for the years
 ended December 31, 1995, 1996, and 1997                             F-7
Consolidated Statements of Cash Flows for the years ended
 December 31, 1995, 1996 and 1997                                    F-10
Notes to Consolidated Financial Statements                           F-12
Supplemental Information Relating to Oil and Gas
 Producing Companies                                                 F-35

CGGS Canadian Gas Gathering Systems Inc.

Auditors' Report to the Directors                                    F-42
Statements of Earnings (Loss) for the years ended
 October 31, 1995 and 1996                                           F-43
Statements of Changes in Financial Position for the years
 ended October 31, 1995 and 1996                                     F-44
Notes to Financial Statements                                        F-45



<PAGE>
                         Report of Independent Auditors



The Board of Directors and Stockholders
Abraxas Petroleum Corporation

      We have audited the  accompanying  consolidated  balance sheets of Abraxas
Petroleum Corporation and Subsidiaries as of December 31, 1996 and 1997, and the
related consolidated  statements of operations,  stockholders'  equity, and cash
flows for each of the three years in the period ended  December 31, 1997.  These
financial  statements are the  responsibility of the Company's  management.  Our
responsibility  is to express an opinion on these financial  statements based on
our audits.

      We conducted our audits in accordance  with  generally  accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

      In our opinion, the financial statements referred to above present fairly,
in all  material  respects,  the  consolidated  financial  position  of  Abraxas
Petroleum  Corporation  and  Subsidiaries at December 31, 1996 and 1997, and the
consolidated  results of their  operations  and their cash flows for each of the
three years in the period ended December 31, 1997, in conformity  with generally
accepted accounting principles.



                                          ERNST & YOUNG LLP

San Antonio, Texas
March 17, 1998



                                      F-2
<PAGE>


<TABLE>
<CAPTION>


                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

                           CONSOLIDATED BALANCE SHEETS


                                     ASSETS


                                                     December 31
                                              --------------------------
                                                  1996         1997
                                              --------------------------
                                                     (In thousands)


<S>                                             <C>          <C>      
Current assets: 
 Cash .................................         $   8,290    $   2,836
  Accounts receivable, less allowance
   for doubtful accounts:
     Joint owners ......................            1,601        2,149
     Oil and gas production sales ......           11,400       11,194
     Affiliates, officers, and                        
      stockholders .....................               94           42
     Other .............................            1,289        1,217
                                              -------------  -----------
                                                   14,384       14,602

  Equipment inventory ..................              451          367
  Other current assets .................              187          508
                                              -------------  -----------
   Total current assets ................           23,312       18,313

Property and equipment..................          310,043      385,442
Less accumulated depreciation,                     38,653       74,597
  depletion, and amortization ..........
                                              -------------  -----------
  Net property and equipment based on
    the full cost method of accounting
    for oil and gas properties of which
    $37,268 and $11,519 at December 31,         
    1996 and 1997, respectively, were
    excluded from amortization .........          271,390      310,845
Deferred financing fees, net of
  accumulated amortization of $280 and
  $1,540 at December 31, 1996 and 1997,            
  respectively .........................            9,335        8,072 
Restricted cash ........................               90           40
Other assets ...........................              715        1,258
                                              =============  ==========
  Total assets .........................        $ 304,842    $ 338,528
                                              =============  ==========
</TABLE>




                             See accompanying notes.



                                      F-3
<PAGE>
<TABLE>
<CAPTION>


                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

                     CONSOLIDATED BALANCE SHEETS (CONTINUED)


                      LIABILITIES AND STOCKHOLDERS' EQUITY


                                                     December 31
                                              --------------------------
                                                  1996         1997
                                              --------------------------
                                                    (In thousands)
<S>                                             <C>          <C>      
Current liabilities:
  Accounts payable .......................      $   9,960    $  17,120
  Oil and gas production payable .........          2,378        2,819
  Accrued interest .......................          3,206        4,622
  Income taxes payable ...................            145          164
  Other accrued expenses .................          1,132        2,732
  Payable to affiliates ..................             58            -
                                              -------------  -----------
   Total current liabilities .............         16,879       27,457

Long-term debt:
  Senior notes ...........................        215,000      215,000
  Credit facility ........................              -       31,500
  Other...................................             32        2,117
                                              -------------  -----------
                                                  215,032      248,617

Other long-term obligations ..............             87            -
Deferred income taxes ....................         32,928       27,751
Minority interest in foreign subsidiary ..          2,157        4,813
Future site restoration  .................          2,103        3,077

Commitments and contingencies

Stockholders' equity:
  Convertible preferred stock 8%,
   authorized 1,000,000 shares; issued and
   outstanding 45,741 and -0- shares at               
   December 31, 1996 and 1997, respectively             -            -
  Common stock, par value $.01 per
   share - authorized 50,000,000
   shares; issued 5,806,812 and                       
   6,422,540 shares at December 31,
   1996 and 1997, respectively .........               58           63
  Additional paid-in capital .............         50,926       51,118
  Accumulated deficit ....................        (12,517)     (19,185)
  Treasury stock, at cost, 74,711 and
   53,023 shares at December 31, 1996 and           
   1997, respectively ....................           (405)        (281)
  Accumulated other comprehensive income         
   (loss) ................................         (2,406)      (4,902) 
                                              -------------  -----------
Total stockholders' equity ...............         35,656       26,813
                                              -------------  -----------
   Total liabilities and stockholders'          
     equity ..............................      $ 304,842    $ 338,528
                                              =============  ===========


</TABLE>

                                  See accompanying notes.


                                      F-4
<PAGE>
<TABLE>
<CAPTION>



                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF OPERATIONS


                                         Year Ended December 31
                                ----------------------------------------
                                    1995          1996         1997
                                ------------- --------------------------
                                 (In thousands except per share data)
<S>                               <C>           <C>          <C> 
Revenue:
  Oil and gas production 
   revenues .................     $  13,660     $  25,749    $  65,826
  Gas processing revenues ...             -           600        3,568
  Rig revenues ..............           108           139          334
  Other  ....................            49           165        1,203
                                 -----------   -----------   -----------
                                     13,817        26,653       70,931

Operating costs and expenses:
  Lease operating and                 
   production taxes .........         4,333         5,858       14,881 
  Gas processing costs ......             -           262        1,252
  Depreciation, depletion, and
   amortization .............         5,434         9,605       30,581
  Rig operations ............           125           169          296
  Proved property impairment              -             -        4,600
  General and administrative          1,042         1,933        4,171
                                 -----------   -----------   -----------    
                                     10,934        17,827       55,781
                                 -----------   -----------   -----------
Operating income.............         2,883         8,826       15,150

Other (income) expense:
  Interest income ...........           (34)         (254)        (320)
  Amortization of deferred 
   financing fee ............           214           280        1,260
  Interest expense ..........         3,911         6,241       24,620
  Other expense (income).....             -           373         (369)
                                 -----------   -----------   -----------
                                      4,091         6,640       25,191
                                 -----------   -----------   -----------
Income (loss) before taxes and
  extraordinary item ........        (1,208)        2,186      (10,041)
Income tax expense (benefit):
  Current ...................             -           176          244
  Deferred ..................             -             -       (4,135)
Minority interest in income of
  consolidated foreign 
  subsidiary ................             -            70          335
                                  -----------   -----------   -----------
Income (loss) before
  extraordinary item ........        (1,208)        1,940       (6,485)

</TABLE>



                                      F-5
<PAGE>

<TABLE>
<CAPTION>

                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

                CONSOLIDATED STATEMENTS OF OPERATIONS (CONTINUED)


                                        Year Ended December 31
                                ----------------------------------------
                                    1995          1996         1997
                                ------------- --------------------------
                                 (In thousands except per share data)
<S>                               <C>           <C>          <C>  
Extraordinary item:
  Debt extinguishment costs       $       -     $    (427)   $       -
                                  -----------   -----------   -----------
Net income (loss) .........          (1,208)        1,513       (6,485)
Less dividend requirement
  on cumulative preferred
  stock ...................            (366)         (366)        (183)
                                  -----------   -----------   -----------
Net income (loss)
  applicable to common            
  stock ...................       $  (1,574)    $   1,147    $  (6,668)
                                  ===========   ===========   ===========

Earnings (loss) per common share:
   Income (loss) before
     extraordinary item ....      $     (.34)   $      .27   $    (1.11)
   Extraordinary item ......              -           (.07)          -
                                  -----------   -----------   -----------
  Net income (loss) per
   common share .............     $     (.34)   $      .20   $    (1.11)
                                   ===========   ===========   =========== 
Earnings (loss) per common
 share - assuming dilution:
   Income (loss) before
     extraordinary item ....      $     (.34)   $      .23   $    (1.11)
   Extraordinary item ......              -           (.06)          -
                                  -----------   -----------   -----------
  Net income (loss) per
   common share - assuming        
   dilution .................     $     (.34)   $      .17   $    (1.11)
                                  ===========   ===========   ===========

</TABLE>





                             See accompanying notes.




                                      F-6
<PAGE>
<TABLE>
<CAPTION>



                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

                 CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                       (In thousands except share amounts)


                                                                                                Accumulated
                        Convertible                                                                Other
                      Preferred Stock   Common Stock    Treasury Stock  Additional              Comprehensive
                     ---------------- ---------------- ----------------  Paid-In    Accumulated    Income
                     Shares   Amount   Shares   Amount  Shares  Amount    Capital     Deficit      (Loss)      Total
                     ----------------------------------------------------------- ------------------------------------
          
<S>                  <C>     <C>      <C>        <C>    <C>    <C>     <C>         <C>            <C>        <C>    
Balance at 
  December 31, 1994  45,741  $ 4,573  4,461,890  $  45     -   $   -   $36,217     $(12,090)      $ (244)    $28,501
  Comprehensive
    income (loss):
   Net loss .......       -      -           -      -      -       -         -       (1,208)        -        (1,208)
                                                                                                           ----------
  Comprehensive                                                                                        
    income (loss)                                                                                            (1,208)  
  Issuance of
    common stock          
    for
    compensation ..       -      -        7,872      -      -       -        74           -         -            74
  Issuance of            
    common stock ..       -      -    1,330,000     13      -       -    10,050           -         -        10,063
  Treasury stock    
    purchased, net        -      -           -       -  2,571      (1)        -           -         -            (1)
  Changes in
    preferred            
    stock par
    value .........       -   (4,573)        -       -      -       -     4,573           -         -           -
  Dividend on             
    preferred
    stock .........       -      -           -       -      -       -         -        (366)        -          (366)
                     ----------------------------------------------------------- -----------------------------------
Balance at           
  December 31, 1995  45,741      -    5,799,762     58  2,571      (1)   50,914      (13,664)     $ (244)    37,063
  Comprehensive
    income (loss):
   Net income .....       -      -           -       -      -       -         -        1,513        -         1,513
   Other
     comprehensive
     income:
     Change in
      unrealized
      holding loss        
      on
      securities ..       -      -           -      -       -       -         -          -           244        244
     Foreign
      currency           
      translation
      adjustment ..       -      -           -      -       -       -         -          -       (2,406)     (2,406)
                                                                                                          ----------
  Comprehensive                                                                                                (649)
    income (loss)
  Issuance of
    common stock          
    for                    
    compensation ..       -      -        5,050     -  (2,500)      1        41          -          -            42
  Expenses paid
    related to            
    private
    placement
    offering ......       -      -           -      -      -        -       (42)         -          -           (42)
  Options                 
    exercised .....       -      -        2,000     -      -        -        13          -          -            13
 
</TABLE>

                                       F-7
<PAGE>
<TABLE>
<CAPTION>



                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

           CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (continued)
                       (In thousands except share amounts)

                                                                                                Accumulated
                        Convertible                                                                Other
                      Preferred Stock   Common Stock    Treasury Stock  Additional              Comprehensive
                     ---------------- ---------------- ----------------  Paid-In    Accumulated    Income
                     Shares   Amount   Shares   Amount  Shares  Amount    Capital     Deficit      (Loss)      Total
                     ----------------------------------------------------------- ------------------------------------
<S>                  <C>      <C>     <C>      <C>     <C>      <C>      <C>        <C>            <C>       <C>      
 Treasury stock
    purchased .....       -      -           -      -  74,640    (405)        -          -          -          (405)
    purchased .....
  Dividend on
    preferred 
    stock .........       -      -           -      -      -        -         -         (366)       -          (366)
                     -----------------------------------------------------------------------------------------------
Balance at
 December 31, 1996   45,741      -    5,806,812   58   74,711    (405)   50,926      (12,517)    (2,406)     35,656
  Comprehensive
    income (loss):
   Net loss .......       -      -           -      -      -       -         -        (6,485)        -       (6,485)
   Other
     comprehensive
     income:
     Foreign
      currency           
      translation
      adjustment ..       -      -           -      -      -       -         -          -        (2,496)     (2,496)
                                                                                                          ----------
  Comprehensive
    income (loss)..                                                                                          (8,981)
  
 
 Issuance of
    common stock         
    for                                                                       
    compensation ..   -       $  -      7,735  $   -   (21,688) $  124   $   186    $              $    -    $   310
  Conversion of
    preferred        
    stock into
    common stock ..  (45,741)    -    508,183      5      -       -           (5)         -             -          - 
  Options                
    exercised .....   -          -      2,000      -      -       -           11          -             -         11
  Dividend on            
    preferred
    stock .........   -          -          -      -      -       -          -          (183)           -       (183)
  Warrants
    exercised .....   -          -     97,810      -      -       -          -            -             -          -
    exercised .....
                     ------------------------------------------------------------------------------------------------

Balance at
 December 31, 1997    -       $  -  6,422,540  $  63    53,023  $ (281)   51,118    $(19,185)      $(4,902)  $26,813
                     ================================================================================================
</TABLE>

                             See accompanying notes.

                                      F-8
<PAGE>
<TABLE>
<CAPTION>

                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF CASH FLOWS


                                                       Year Ended December 31
                                             -----------------------------------------
                                                    1995          1996          1997
                                             ------------- ------------- -------------
                                              (In thousands)
<S>                                               <C>          <C>          <C> 
Operating Activities
Net income (loss) .............................   $  (1,208)   $   1,513    $  (6,485)
Adjustments to reconcile net
  income (loss) to net cash
  provided by operating
  activities:
   Minority interest in
     income of foreign
     subsidiary ...............................        --             70          335
   Depreciation, depletion,
     and amortization .........................       5,434        9,605       30,581
   Proved property impairment .................        --           --          4,600
   Deferred income tax benefit ................        --           --         (4,135)

   Amortization of deferred
     financing fees ...........................         214          280        1,260
   Issuance of common stock
     for compensation .........................          74           42          310
   Loss on marketable
     securities ...............................        --            235         --
   Net loss from debt
     restructurings ...........................        --            427         --
   Changes in operating assets and liabilities:
      Accounts receivable .....................        (807)      (6,013)        (444)
      Equipment inventory .....................         (29)         (82)          76
      Other assets ............................           2         (133)        (325)
      Accounts payable and
        accrued expenses ......................         (79)       7,009       10,402
      Oil and gas production
        payable ...............................         919          591          466
                                                  ---------    ---------    ---------
Net cash provided by ..........................       4,520       13,544       36,641
  operating activities

Investing Activities
Capital expenditures,
  including purchases
  and development of
  properties ..................................     (12,330)     (87,793)     (84,111)
Payment for purchase of  CGGS,
  net of cash acquired ........................        --        (85,362)        --
Proceeds from sale of oil
  and gas properties and equipment
  inventory ...................................       2,556          242        9,606
Purchase of interest in real
  estate partnership ..........................        (311)        --           --
Proceeds from sale of
  marketable securities .......................        --            335         --
                                                  ---------    ---------    ---------
Net cash used in investing
  activities ..................................     (10,085)    (172,578)     (74,505)
</TABLE>

                                      F-9
<PAGE>
<TABLE>
<CAPTION>






                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

                CONSOLIDATED STATEMENTS OF CASH FLOWS (CONTINUED)


                                                             Year Ended December 31
                                                   ----------------------------------------
                                                        1995          1996          1997
                                                   ----------------------------------------
                                                                (In thousands)

<S>                                                  <C>          <C>          <C>       
Financing Activities
Preferred stock dividends ........................   $    (366)   $    (366)   $    (183)
Issuance of common stock, net
  of expenses ....................................      10,063          (29)          11
Purchase of treasury stock, net ..................          (1)        (405)        --
Proceeds from long-term borrowings ...............       5,950      305,400       33,620
Payments on long-term borrowing ..................      (5,646)    (131,969)        --

Deferred financing fees ..........................        (186)      (9,688)        (123)
Other ............................................        --             87         --
                                                      ----------  -----------  -----------
Net cash provided by
  financing activities ...........................       9,814      163,030       33,325
Effect of exchange rate
  changes on cash ................................        --           --           (965)
                                                      ----------  -----------  -----------     
Increase (decrease) in cash ......................       4,249        3,996       (5,504)
Cash at beginning of year ........................         135        4,384        8,380
                                                      ----------  -----------  -----------                      
Cash at end of year,
  including restricted cash ......................   $   4,384    $   8,380    $   2,876
                                                      ==========  ===========  ===========

Supplemental Disclosures
Supplemental disclosures of cash flow information:
   Interest paid .................................   $   3,884    $   3,863    $  24,170
                                                      ==========  ===========  ===========                                  

</TABLE>

Supplemental schedule of noncash investing and financing activities:
   During 1996, the Company  purchased all of the capital stock of CGGS Canadian
     Gas Gathering  Systems,  Inc. for  $85,362,000,  net of cash  acquired.  In
     conjunction with the acquisition,  liabilities  assumed were as follows (in
     thousands):
      Fair value of assets acquired .......................   $ 123,970
      Cash paid for the capital stock .....................     (85,362)
                                                            -------------
      Liabilities assumed .................................   $  38,608
                                                            =============


   During  1997,  the  Company's  subsidiary,  Cascade  Oil & Gas Ltd.  acquired
     certain crude oil and gas producing  properties through the issuance of its
     common shares and special warrants valued at approximately$3,700,000.


                             See accompanying notes.


                                      F-10
<PAGE>



                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

                        December 31, 1995, 1996, and 1997


1.  Organization and Significant Accounting Policies

Nature of Operations

      Abraxas  Petroleum  Corporation (the Company or Abraxas) is an independent
energy company engaged in the exploration for and the acquisition,  development,
and  production  of crude oil and  natural  gas  primarily  along the Texas Gulf
Coast, in the Permian Basin of western Texas, and in Canada and Wyoming, and the
processing  of natural  gas  primarily  in Canada.  The  consolidated  financial
statements  include  the  accounts  of the  Company  and its  subsidiaries.  All
significant  intercompany  accounts and  transactions  have been  eliminated  in
consolidation.

Use of Estimates

      The  preparation  of financial  statements  in conformity  with  generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that  affect the  reported  amounts of assets and  liabilities  and
disclosure of  contingent  assets and  liabilities  at the date of the financial
statements  and the  reported  amounts  of  revenues  and  expenses  during  the
reporting period.  Actual results could differ from those estimates.  Management
believes that it is reasonably  possible that  estimates of proved crude oil and
natural gas revenues could significantly change in the future.

Concentration of Credit Risk

      Financial  instruments which potentially expose the Company to credit risk
consist  principally  of trade  receivables,  interest  rate and  crude  oil and
natural  gas price swap  agreements.  Accounts  receivable  are  generally  from
companies  with  significant  oil  and gas  marketing  activities.  The  Company
performs ongoing credit evaluations and, generally,  requires no collateral from
its   customers.   For  further   information   regarding  the  Company's   swap
arrangements, see Notes 4 and 15.

Equipment Inventory

      Equipment inventory consists of casing,  tubing, and compressing equipment
and is carried at the lower of cost or market.

Oil and Gas Properties

      The Company  follows the full cost method of accounting  for crude oil and
natural gas properties. Under this method, all costs associated with acquisition
of properties and successful as well as unsuccessful exploration and development
activities  are  capitalized.  The Company does not capitalize  internal  costs.
Depreciation,  depletion,  and amortization  (DD&A) of capitalized crude oil and
natural  gas  properties  and  estimated  future  development  costs,  excluding
unevaluated,  unproved properties,  are based on the  unit-of-production  method
based on proved  reserves.  Net  capitalized  costs of crude oil and natural gas
properties,  less related deferred taxes, are limited,  by country, to the lower
of unamortized cost or the cost ceiling, defined as the sum of the present value
of estimated  unescalated future net revenues from proved reserves discounted at
10 percent,  plus the cost of properties not being  amortized,  if any, plus the
lower of cost or  estimated  fair value of unproved  properties  included in the
costs being  amortized,  if any,  less related  income  taxes.  Excess costs are
charged to proved  property  impairment  expense.  No gain or loss is recognized
upon sale or  disposition  of crude oil and  natural gas  properties,  except in
unusual circumstances.


                                      F-11
<PAGE>


      Unevaluated  properties not currently being amortized  included in oil and
gas properties  were  approximately  $37,268,000 and $11,519,000 at December 31,
1996 and 1997,  respectively.  The  properties  represented  by these costs were
undergoing exploration activities or are properties on which the Company intends
to commence  activities in the future. The Company believes that the unevaluated
properties  at  December  31,  1997 will be  substantially  evaluated  in six to
thirty-six months and it will begin to amortize these costs at such time.

Other Property and Equipment

      Other   property  and  equipment  are  recorded  on  the  basis  of  cost.
Depreciation  of  processing  facilities  and other  property  and  equipment is
provided over the estimated useful lives using the straight-line  method.  Major
renewals and betterments are recorded as additions to the property and equipment
accounts.  Repairs  that do not improve or extend the useful lives of assets are
expensed.

Hedging

      The Company  periodically  enters into  derivative  contracts to hedge the
risk of future crude oil and natural gas fluctuations. Such contracts may either
fix or  support  crude oil and  natural  gas prices or limit the impact of price
fluctuations  with respect to the Company's  sales of crude oil and natural gas.
Gains and  losses  on such  hedging  activities  are  recognized  in oil and gas
production revenues when hedged production is sold.

Stock-Based Compensation

      Statement of  Financial  Accounting  Standards  No. 123,  "Accounting  for
Stock-Based Compensation," encourages, but does not require, companies to record
compensation cost for stock-based employee compensation plans at fair value. The
Company has chosen to continue to account for stock-based compensation using the
intrinsic value method prescribed in Accounting Principles Board Opinion No. 25,
"Accounting  for  Stock  Issued  to  Employees,"  and  related  interpretations.
Accordingly,  compensation  cost for stock options is measured as the excess, if
any, of the quoted market price of the Company's  stock at the date of the grant
over the amount an employee must pay to acquire the stock (see Note 6).

Foreign Currency Translation

      The  functional  currency for the  Company's  Canadian  operations  is the
Canadian  dollar.  The Company  translates  the  functional  currency  into U.S.
dollars  based on the  current  exchange  rate at the end of the  period for the
balance  sheet and a weighted  average  rate for the period on the  statement of
operations.   Translation   adjustments  are  reflected  as  Accumulated   Other
Comprehensive Income in Stockholders' Equity.

Fair Value of Financial Instruments

      The Company  includes fair value  information in the notes to consolidated
financial  statements  when  the  fair  value of its  financial  instruments  is
different  from the book  value.  The  Company  assumes  the book value of those
financial  instruments  that are classified as current  approximates  fair value
because of the short maturity of these  instruments.  For  noncurrent  financial
instruments,  the Company uses quoted market prices or, to the extent that there
are no available quoted market prices, market prices for similar instruments.



                                      F-12
<PAGE>



Restoration, Removal and Environmental Liabilities

      The  estimated  costs of  restoration  and  removal  of  major  processing
facilities are accrued on a  straight-line  basis over the life of the property.
The estimated future costs for known environmental  remediation requirements are
accrued when it is probable that a liability has been incurred and the amount of
remediation   costs  can  be  reasonably   estimated.   These  amounts  are  the
undiscounted,  future estimated costs under existing regulatory requirements and
using existing technology.

Revenue Recognition

      The Company recognizes crude oil and natural gas revenue from its interest
in producing  wells as crude oil and natural gas is sold from those wells net of
royalties.  Revenue  from the  processing  of natural gas is  recognized  in the
period the service is performed.

Deferred Financing Fees

      Deferred  financing  fees are being  amortized on a level yield basis over
the term of the related debt.

Federal Income Taxes

      The Company  records  income taxes under  Financial  Accounting  Standards
Board Statement No. 109 using the liability method. Under this method,  deferred
tax assets and liabilities are determined based on differences between financial
reporting  and tax bases of assets and  liabilities  and are measured  using the
enacted  tax rates and laws that  will be in  effect  when the  differences  are
expected to reverse.

Earnings per Share

      In 1997,  the Financial  Accounting  Standards  Board issued  Statement of
Financial  Accounting  Standards  No. 128,  Earnings  per Share.  Statement  128
replaced the previously  reported  primary and fully diluted  earnings per share
with basic and diluted  earnings per share.  Unlike primary  earnings per share,
basic earnings per share excludes any dilutive effects of options,  warrants and
convertible  securities.  Diluted  earnings  per  share is very  similar  to the
previously reported fully diluted earnings per share. Earnings per share amounts
for all periods have been restated to conform to the  requirements  of Statement
128.

Comprehensive Income

      During  1997,   the  Company   adopted   Statement   No.  130,   Reporting
Comprehensive Income.  Statement No. 130 establishes new rules for the reporting
and display of comprehensive income and its components; however, the adoption of
this  Statement  had no  impact on the  Company's  net  income or  stockholders'
equity.  Statement No. 130 requires  unrealized gains or losses on the Company's
available-for-sale  securities and the foreign currency translation adjustments,
which prior to adoption were reported separately in stockholders'  equity, to be
included in other  comprehensive  income.  Prior year financial  statements have
been reclassified to conform to the requirements of Statement No. 130.

Impact of Statement of Financial Accounting Standards No. 131

      Also in  June  1997,  the  Financial  Accounting  Standards  Board  issued
Statement  No. 131,  Disclosures  about  Segments of an  Enterprise  and Related
Information.  Statement  No. 131  establishes  standards  for the  reporting  of
financial  information from operating  segments in annual and interim  financial
statements.  This Statement  requires that financial  information be reported on
the basis that it is reported  internally for evaluating segment performance and
deciding how to allocate  resources to segments.  Statement  No. 131 will become
effective in 1998.


                                      F-13
<PAGE>


Reclassifications

      Certain balances for 1995 and 1996 have been  reclassified for comparative
purposes.

2.  Acquisitions and Divestitures

Pacalta Properties Acquisition

      In October 1997, Canadian Abraxas Petroleum Limited (Canadian Abraxas),  a
wholly owned subsidiary of the Company,  and Cascade Oil and Gas Ltd.  (Cascade)
completed  the  acquisition  of the Canadian  assets of Pacalta  Resources  Ltd.
(Pacalta Properties) for approximately $14,000,000  (CDN$20,000,000) in cash and
four  million  Cascade  special  warrants  valued at  approximately  $1,375,000.
Canadian Abraxas acquired an approximate 92% interest in the Pacalta Properties,
and Cascade acquired an approximate 8% interest.  Cascade has the opportunity to
acquire the Canadian Abraxas' ownership upon arranging satisfactory financing in
the future.  The Cascade special warrants are exchangeable  into an equal number
of Cascade common shares.

      The  acquisition  was accounted for as a purchase,  and the purchase price
was  allocated  to the crude oil and  natural gas  properties  based on the fair
values of the  properties  acquired.  The  transaction  was financed  through an
advance from the Company with funds which were obtained through borrowings under
the Company's Credit Facility. Revenues and expenses from the Pacalta Properties
have been included in the consolidated financial statements since October 1997.

Pennant Acquisition

      In  September  1997,  Cascade  acquired  all the common  shares if Pennant
Petroleum  Ltd.  in exchange  for the  issuance of  7,585,000  common  shares of
Cascade valued at approximately $2,278,000. The acquisition was accounted for as
a purchase and the purchase price was allocated to the crude oil and natural gas
properties  based on the fair values of the  properties  acquired.  Revenues and
expenses  from  Pennant  have  been  included  in  the  consolidated   financial
statements since October 1997.

Wyoming Properties Acquisition

      On September 30, 1996, the Company acquired interests in certain producing
crude  oil  and  natural  gas  properties  located  in  the  Wamsutter  area  of
southwestern Wyoming (the Wyoming Properties) from Enserch Exploration, Inc. The
initially agreed to purchase price of $47,500,000 was adjusted to $45,122,000 to
reflect  adjustments of net production revenue which accrued to the Company from
April 1, 1996, the effective  date,  until closing,  net of interest owed by the
Company for the same period and transaction costs. The acquisition was accounted
for as a purchase and the purchase  price was allocated to crude oil and natural
gas  properties  based  on the  fair  values  of the  properties  acquired.  The
transaction was financed through  borrowings under the Company's bridge facility
referred to in Note 4.  Revenues and expenses from the Wyoming  Properties  have
been included in the consolidated financial statements since September 30, 1996.

CGGS Acquisition

      On November 14, 1996,  the Company,  through its wholly owned  subsidiary,
Canadian  Abraxas  purchased  100%  of the  outstanding  capital  stock  of CGGS
Canadian Gas Gathering Systems Inc. (CGGS) for approximately $85,500,000, net of
the CGGS cash acquired and including  transaction costs. CGGS owns producing oil
and gas properties in western Canada and adjacent processing  facilities as well
as undeveloped  leasehold properties.  Immediately after the purchase,  CGGS was
merged with and into Canadian  Abraxas.  The  acquisition was accounted for as a
purchase and the  purchase  price was  allocated  to the assets and  liabilities
based on estimated fair values. The transaction was financed by a portion of the
proceeds  from the  offering  of  $215,000,000  of Notes  referred to in Note 4.
Revenues  and  expenses  from  Canadian   Abraxas  have  been  included  in  the
consolidated financial statements since November 14, 1996.

                                      F-14
<PAGE>

Grey Wolf Acquisition

      In January  1996,  the Company made a $3,000,000  investment  in Grey Wolf
Exploration Ltd. (Grey Wolf), a privately-held  Canadian corporation,  which, in
turn,  invested these proceeds in  newly-issued  shares of Cascade,  an Alberta,
Canada corporation whose common shares are traded on The Alberta Stock Exchange.
The  acquisition  was  accounted  for as a purchase and the  purchase  price was
allocated to the assets and liabilities  based on the fair values.  Revenues and
expenses  have been  included in the  consolidated  financial  statements  since
January  1996.  During 1997,  Cascade  acquired 100% of the common stock of Grey
Wolf in exchange for the issuance of  additional  Cascade  common  shares to the
Grey Wolf shareholders and the cancellation of the common shares of Cascade held
by Grey  Wolf.  This  transaction  resulted  in the share  ownership  of Cascade
previously  held by Grey Wolf being  passed to the Grey Wolf  shareholders,  and
Grey Wolf was merged into Cascade.

Portilla and Happy Fields Acquisition

      In March 1996,  the Company  sold all of its  interest in its Portilla and
Happy  Fields  to  an  unrelated  purchaser   (Purchaser  or  Limited  Partner).
Simultaneously  with this  sale,  the  Limited  Partner  also  acquired  the 50%
overriding  royalty  interest  in the  Portilla  Field  owned by the  Commingled
Pension Trust Fund  Petroleum II, the trustee of which is Morgan  Guaranty Trust
Company of New York (Pension  Fund). In connection with the purchase of both the
Company's  interest in the  Portilla  and Happy  Fields and the  Pension  Fund's
interest in the Portilla Field  (together,  the Portilla and Happy  Properties),
the Limited  Partner  obtained a loan (Bank Loan) secured by the  Properties and
contributed the Properties to Portilla-1996,  L.P., a Texas limited  partnership
(Partnership).   A  subsidiary  of  the  Company,   Portilla-Happy   Corporation
(Portilla-Happy),  was the general  partner of the  Partnership.  The  aggregate
purchase price received by the Company was $17,600,000,  of which $2,000,000 was
used to purchase a minority interest in the Partnership.

      On November 14,  1996,  the Company  closed an agreement  with the Limited
Partner and certain  noteholders  (Noteholders) of the Partnership,  pursuant to
which the Company obtained the Limited Partner's interest in the Partnership and
the Noteholders' notes in the aggregate  principal amount of $5,920,000 (Notes),
resulting in the Company's  owning,  on a consolidated  basis, all of the equity
interests in the Partnership.  The aggregate  consideration  paid to the Limited
Partner and the Noteholders  was $6,961,000.  The Company also paid off the Bank
Loan which had an outstanding  principal  balance of approximately  $20,051,000,
and assumed a crude oil and natural gas price swap agreement (see Note 15).

      As  a  result  of  obtaining  the  Limited   Partner's   interest  in  the
Partnership,  the Company  reacquired  those interests in the Portilla and Happy
Fields which it previously  owned, as well as the interest in the Portilla Field
previously  owned by the Pension  Fund.  The Company has included in its balance
sheet the amount  previously  removed from oil and gas  properties in connection
with the sale of its  interest  in the  Portilla  and Happy  Fields  during  the
quarter ended March 31, 1996,  as well as the amount of the purchase  price paid
for the Pension  Fund's  interest in the  Portilla  Field,  and all  development
drilling  expenditures  incurred  on the  properties,  less the  amount  of DD&A
related to the  properties  from the  formation of the  Partnership  through the
closing  of the  transaction.  The  purchase  was  financed  by a portion of the
proceeds  from the  offering  of the Notes  referred  to in Note 4. The  Company
recorded  its  share  of the net  loss of the  Partnership  from  March  1996 to
November 1996 of $513,000.  The Company also assumed and wrote off the remaining
deferred  financing  fees  and  organization  costs  of the  Partnership.  Gross
revenues and expenses from both the Company's  original interest in the Portilla
and Happy Fields as well as the interest in the Portilla Field  previously owned
by the Pension Fund have been included in the consolidated  financial statements
since November 14, 1996.

East White Point and Stedman Island Fields Acquisition

      In November  1996,  the Company  obtained a release of the 50%  overriding
royalty interest in the East White Point Field in San Patricia County, Texas and
the Stedman  Island  Field in Nueces  County,  Texas from the  Pension  Fund for
$9,271,000  before  adjustment  for  accrual  of net  revenue  to  closing.  The
acquisition was accounted for as a purchase and the purchase price was allocated


                                      F-15
<PAGE>

to  crude  oil and  natural  gas  properties  based on the  fair  values  of the
properties  acquired.  The transaction was financed through proceeds of the sale
of the Notes referred to in Note 4. Revenues and expenses from these  properties
have been included in the  consolidated  financial  statements since November 1,
1996. The Company recorded the net purchase price of approximately $9,271,000 to
its oil and gas properties.

Miscellaneous Working Interests

      During 1996,  the Company also acquired  additional  working  interests in
certain  producing crude oil and natural gas properties in which the Company had
existing  working  interest  ownership.  The  net  purchase  price  amounted  to
approximately  $1,221,000.  Revenues  and  expenses  have been  included  in the
consolidated financial statement from the date of purchase.

Texas Gulf Coast Properties Acquisition

      In October 1995,  the Company  acquired  additional  working  interests in
certain  producing crude oil and natural gas properties in which the Company had
an  existing  working  interest  ownership.  The net  purchase  price to Abraxas
amounted to approximately $635,000.  Revenues and expenses have been included in
the consolidated financial statements since October 1, 1995.

      The condensed pro forma financial  information  for the periods  presented
below  summarize  on an  unaudited  pro forma basis  approximate  results of the
Company's consolidated operations for the years ended December 31, 1995 and 1996
assuming  the  acquisitions  of the Wyoming  Properties,  CGGS,  Grey Wolf,  the
Portilla  and Happy  Properties,  and the East White  Point and  Stedman  Island
Fields  occurred  at  January  1,  1995.  The pro  forma  information  does  not
necessarily  represent what the actual consolidated  results would have been for
these periods and is not intended to be indicative of future results.

                                                       December 31
                                                 -------------------------
                                                    1995        1996
                                                 ------------------------
                                                  (In thousands except
                                                     per share data)
                                                       (Unaudited)

   Revenues ...............................        $ 46,132   $60,077
                                                   =========  =========

   Income (loss) before extraordinary item         $(16,430)  $(6,665)
                                                   =========  =========

   Net income (loss) ......................        $(16,430)  $(7,092)
                                                   =========  =========     

   Income (loss) per common share:
     Before extraordinary item ............        $ (3.54)   $  (.98)
     Net income (loss) ....................        $ (3.54)   $ (1.04)

Divestiture

      In July  1995,  the  Company  sold its C.S.  Dean  Unit for  approximately
$2,550,000.  In January 1997, the Company sold its interest in its crude oil and
natural gas processing  properties in the Hoole area in Alberta,  Canada for net
proceeds of  approximately  $8,700,000  which was credited to the Canadian  full
cost pool.


                                      F-16
<PAGE>


3.  Property and Equipment

      The major components of property and equipment, at cost, are as follows:

                                      Estimated
                                      Useful         1996        1997
                                         Life
                                      ----------- ----------- -----------
                                        Years         (In thousands)

   Land, buildings, and improvements      15       $    269    $    291
   Crude oil and natural gas               
     properties ....................       -        268,358     344,199
   Natural gas processing plants ...      18         40,100      39,113
   Equipment and other .............       7          1,316       1,839
                                                  ----------  -----------
                                                   $310,043   $385,442
                                                  ==========  ===========

4.  Long-Term Debt

      Long-term debt consists of the following:

                                                       December 31
                                                     1996        1997
                                                  ----------- -----------
                                 (In thousands)


   11.5% Senior Notes due 2004, Series B (see       
     below). ...............................       $215,000    $215,000
   Credit facility due to Bankers Trust
     Company, ING                                      
     Capital and Union Bank of California (see
     below). ...............................              -      31,500
   Credit facility due to a Canadian bank,
     providing for borrowings to
     approximately $2,800,000 at the                   
     bank's prime rate plus .25%, 5.5% at
     December 31, 1997.....................               -       2,096
   Other ...................................             32          21
                                                  ----------- -----------
                                                    215,032     248,617
   Less current maturities .................              -           -
                                                  ----------- -----------
                                                   $215,032    $248,617
                                                  =========== ===========

      On November 14, 1996, the Company and Canadian Abraxas  completed the sale
of $215,000,000  aggregate principal amount of Senior Notes due November 1, 2004
(Notes).  In January 1997,  the Notes were  exchanged for Series B Notes,  which
have been registered under the Securities Act of 1933 (Series B Notes). The form
and terms of the Series B Notes are the same as the Notes issued on November 14,
1996.  Interest  at 11.5%  is  payable  semi-annually  in  arrears  on May 1 and
November  1 of each  year,  commencing  on May 1,  1997.  The Series B Notes are
general unsecured  obligations of the Company and Canadian Abraxas and rank pari
passu in right of payment to all future subordinated indebtedness of the Company
and Canadian Abraxas. The Series B Notes are, however,  effectively subordinated
in right of  payment to all  existing  and future  secured  indebtedness  to the
extent of the value of the assets  securing such  indebtedness.  The Company and
Canadian  Abraxas  are joint and  several  obligors  on the Series B Notes.  The
Series B Notes are redeemable, in whole or in part, at the option of the Company
and Canadian  Abraxas on or after November 1, 2000, at the  redemption  price of
105.75% through  October 31, 2001,  102.87% through October 31, 2002 and 100.00%
thereafter plus accrued interest. In addition,  any time on or prior to November
1, 1999, the Company and Canadian  Abraxas may redeem up to 35% of the aggregate
principal amount of the Series B Notes originally  issued with the cash proceeds
of one or more equity offerings at a redemption price of 111.5% of the aggregate
principal  amount of the Series B Notes to be redeemed  plus  accrued  interest,
provided,  however,  that  after  giving  effect  to such  redemption,  at least
$139,750,000  aggregate principal amount of Series B Notes remains  outstanding.
The Series B Notes were issued  under the terms of an Indenture  dated  November
14, 1996 that contains,  among others,  certain  covenants which generally limit
the ability of the Company to incur additional  indebtedness other than specific


                                      F-17
<PAGE>

indebtedness  permitted  under the  Indenture,  including  the  Credit  Facility
discussed below,  provided  however,  if no event of default is continuing,  the
Company  may  incur  indebtedness  if  after  giving  pro  forma  effect  to the
incurrence  of  such  debt  both  the  Company's  consolidated  earnings  before
interest,  taxes,  depletion and amortization  (EBITDA)  coverage ratio would be
greater than 2.25 to 1.0 if prior to November 1, 1997, and at least equal to 2.5
to 1.0 thereafter,  and the Company's adjusted consolidated net tangible assets,
as defined, are greater than 150% of the aggregate consolidated  indebtedness of
the Company or the  Company's  adjusted  consolidated  net  tangible  assets are
greater than 200% of the aggregate consolidated indebtedness of the Company. The
Indenture also contains other covenants  affecting the Company's  ability to pay
dividends on its common stock, sell assets and incur liens.

      On September  30, 1996,  the Company  entered into a credit  facility with
Bankers Trust Company (BTCo) and ING Capital (together the Lenders), providing a
bridge  facility in the total amount of  $90,000,000  and  borrowed  $85,000,000
which was used to repay all amounts due under its previous credit  agreement and
to finance the purchase of the Wyoming Properties.

      On November 14, 1996, the Company repaid all amounts outstanding under the
bridge  facility  with  proceeds  from the  offering  of  $215,000,000  of Notes
described  above and  entered  into an amended  and  restated  credit  agreement
(Credit Facility) with the Lenders and Union Bank of California.  On October 14,
1997, the Company amended the Credit Facility to provide for a revolving line of
credit  with  an  availability  of  $40,000,000,  subject  to a  borrowing  base
condition.  At December 31, 1996 and 1997, $-0- and $31,500,000 were outstanding
under the Credit Facility.

      Commitments  available  under the Credit Facility are subject to borrowing
base  redeterminations to be performed  semi-annually and, at the option of each
of the Company and the Lenders,  one additional time per year. Amounts due under
the Credit  Facility will be secured by the Company's oil and gas properties and
plants.  Any outstanding  principal balance in excess of the borrowing base will
be due and  payable in three  equal  monthly  payments  after a  borrowing  base
redetermination.  The  borrowing  base will be  determined  in the agent's  sole
discretion,  subject to the approval of the  Lenders,  based on the value of the
Company's  reserves  as  set  forth  in the  reserve  report  of  the  Company's
independent  petroleum  engineers,  with consideration given to other assets and
liabilities.

      The  Credit  Facility  has an  initial  revolving  term of two years and a
reducing period of three years from the end of the initial two-year period.  The
commitment under the Credit Facility will be reduced during such reducing period
by eleven equal quarterly  reductions.  Quarterly reductions will equal 8.2% per
quarter with the remainder due at the end of the three-year reducing period.

      The  applicable  interest rate charged on the  outstanding  balance of the
Credit  Facility is based on a facility usage grid. If the borrowings  under the
Credit Facility represent an amount less than or equal to 33.3% of the available
borrowing  base,  then the applicable  interest rate charged on the  outstanding
balance  will be either (a) an adjusted  rate of the London  Inter-Bank  Offered
Rate  ("LIBOR") plus 1.25% or (b) the prime rate of the agent (which is based on
the agent's published prime rate) plus 0.50%. If the borrowings under the Credit
Facility  represent an amount greater than or equal to 33.3% but less than 66.7%
of the  available  borrowing  base,  then the  applicable  interest  rate on the
outstanding  principal will be either (a) LIBOR plus 1.75% or (b) the prime rate
of the agent plus 0.50%. If the borrowings  under the Credit Facility  represent
an amount greater than or equal to 66.7% of the available  borrowing  base, then
the  applicable  interest rate on the  outstanding  principal will be either (a)
LIBOR plus 2.00% or (b) the prime rate of the agent plus 0.50%.  LIBOR elections
can be made for  periods  of one,  three or six  months.  The  interest  rate at
December 31, 1997 was 7.80%.

      The Credit  Facility  contains a number of  covenants  that,  among  other
things, restrict the ability of the Company to (i) incur certain indebtedness or
guarantee obligations, (ii) prepay other indebtedness including the Notes, (iii)
make investments, loans or advances, (iv) create certain liens, (v) make certain
payments, dividends and distributions, (vi) merge with or sell assets to another
person or  liquidate,  (vii)  sell or  discount  receivables,  (viii)  engage in
certain intercompany transactions and transactions with affiliates,  (ix) change
its business, (x) experience a change of control and (xi) make amendments to its
charter,  by-laws  and other debt  instruments.  In  addition,  under the Credit


                                      F-18
<PAGE>

Facility the Company is required to comply with specified  financial  ratios and
tests,  including  minimum debt service coverage ratios,  maximum funded debt to
EBITDA tests,  minimum net worth tests and minimum  working  capital tests.  The
Company is obligated to pay the Lenders on a quarterly basis a commitment fee of
0.50% per annum on the average  unused  portion of the commitment in effect from
time to  time.  The  Credit  Facility  contains  customary  events  of  default,
including  nonpayment  of principal,  interest or fees,  violation of covenants,
inaccuracy  of  representations  or warranties  in any material  respect,  cross
default  and cross  acceleration  to  certain  other  indebtedness,  bankruptcy,
material  judgments and  liabilities  and change of control.  As of December 31,
1997,  the Company was not in  compliance  with the working  capital and capital
expenditures  requirements under the Credit Facility. The Company has received a
waiver of these requirements through March 31, 1998. Under the provisions of the
Credit Facility, the Company is required to maintain working capital (as defined
in the  agreement)  of at least 1.00 to 1.00. At December 31, 1997 the Company's
working  capital  was less than the  required  amount,  however,  subsequent  to
December 31, 1997 the Company  repaid all  outstanding  amounts under the Credit
Facility except  $100,000,  which  management  believes will restore its working
capital ratio to the required  amount.  Accordingly,  amounts  payable under the
Credit Facility are classified as long-term in the  accompanying  balance sheet.
Should  crude oil  prices  continue  to  decline,  a further  write-down  of the
Company's  oil and gas  properties  may be  required  (see Note  16).  If such a
write-down  were  large  enough,  it could  result in a default in the net worth
requirement under the Credit Facility.

      As part of the bridge facility,  the Company entered into an interest rate
swap  agreement (the Swap) covering the period from September 18, 1996 to August
18, 1998.  The Swap  effectively  changes the interest  rate on  $25,000,000  of
floating rate debt to a fixed rate of 6.15% per annum for that time period.  Net
payments  due under this  agreement  are  included  as  adjustments  to interest
expense.  At December 31, 1997,  the fair value of this Swap,  as  determined by
BTCo was  approximately  $64,000 and has been  recorded  as interest  expense at
December  31,  1997.  The  Company  is  exposed  to credit  loss in the event of
nonperformance by the counterparty. The amount of such exposure is generally the
unrealized gains in such agreement.

      In January 1998,  the Company and Canadian  Abraxas  completed the sale of
$60,000,000  aggregate principal amount of 11.5% Senior Notes due 2004, Series C
(Series C Notes).  The Series C Notes are general  unsecured  obligations of the
Company and  Canadian  Abraxas and rank pari passu in right to all  existing and
future  indebtedness of the Company and Canadian  Abraxas and on parity with the
Series B Notes  and  senior  in  right of  payment  to all  future  subordinated
indebtedness  of the Company and  Canadian  Abraxas.  The Series C Senior  Notes
carry similar redemption provisions to the Series B Notes and are subject to the
terms of the Indenture dated January 27, 1998 which is substantially  similar to
the  Indenture  governing the Series B Notes.  The Company and Canadian  Abraxas
sold the Series C Notes at a premium of $4,050,000  which will be amortized over
the life of the Series C Notes  resulting  in an  effective  rate of interest of
10.5%.  The  net  proceeds,  after  deducting  estimated  offering  costs,  were
$62,750,000,  $33,400,000  of which was used to repay  outstanding  indebtedness
under the Credit Facility,  except for $100,000 which remained  outstanding with
the remainder used for general corporate purposes.

      The Company's  principal  source of funds to meet debt service and capital
requirements  is net  cash  flow  provided  by  operating  activities,  which is
sensitive to the prices the Company  receives for its crude oil and natural gas.
The Company  periodically enters into hedge agreements to reduce its exposure to
price risk in the spot market for natural gas. However, a substantial portion of
the Company's  production will remain subject to such price risk.  Additionally,
significant capital expenditures are required for drilling and development,  and
other equipment additions.  The Company believes that cash provided by operating
activities and other financing  sources,  including,  if necessary,  the sale of
certain assets and additional  long-term debt, will provide  adequate  liquidity
for the Company's operations, including its capital expenditure program, for the
next twelve months. No assurance,  however, can be given that the Company's cash
flow from  operating  activities  will be  sufficient  to meet  planned  capital
expenditures  and debt  service in the  future.  Should the Company be unable to
generate sufficient cash flow from operating  activities to meet its obligations
and make planned  capital  expenditures,  the Company  could be forced to reduce
such  expenditures,  sell assets or be required to refinance all or a portion of
its existing debt or to obtain additional  financing.  There can be no assurance
that such refinancing  would be possible or that any additional  financing could
be obtained.

                                      F-19
<PAGE>

      During 1996 and 1997,  the Company  capitalized  $465,000  and $966,000 of
interest expense, respectively.

      The fair value of the Notes was approximately  $236,500,000 as of December
31, 1997. The fair values of the credit  facilities  approximate  their carrying
values as of December  31, 1997.  The Company has  approximately  $1,800,000  of
standby  letters of credit and a $30,000  performance  bond open at December 31,
1997.  Approximately  $40,000  of cash is  restricted  and in escrow  related to
certain of the letters of credit and bond.

5.  Stockholders' Equity

Common Stock

      Holders of common  stock are  entitled  to one vote for each share and are
not entitled to preemptive  rights to subscribe to  additional  shares of common
stock issued by the Company. Holders are entitled to receive dividends as may be
declared  by the  Board of  Directors,  subject  to the  rights  of  holders  of
preferred stock and the terms of the Company's credit agreement,  which restrict
the payment of dividends.

      In 1994, the Board of Directors  adopted a  Stockholders'  Rights Plan and
declared a dividend of one Common Stock  Purchase  Right (Rights) for each share
of common stock. The Rights are not initially exercisable.  Subject to the Board
of Directors'  option to extend the period,  the Rights will become  exercisable
and will  detach  from the  common  stock ten days after any person has become a
beneficial owner of 20% or more of the common stock of the Company or has made a
tender offer or exchange offer (other than certain qualifying offers) for 20% or
more of the common stock of the Company.

      Once the Rights become exercisable,  each Right entitles the holder, other
than the acquiring  person,  to purchase for $20 one-half of one share of common
stock of the  Company  having a value of four  times  the  purchase  price.  The
Company  may  redeem  the  Rights  at any time for  $.01  per  Right  prior to a
specified  period of time after a tender or  exchange  offer.  The  Rights  will
expire in November 2004, unless earlier exchanged or redeemed.

      In November 1995, the Company issued 1,330,000  units,  each consisting of
one share of common  stock  and one  Contingent  Value  Right  (CVR),  through a
private placement, resulting in net proceeds of $10,063,000. Each CVR allows the
holder the right to acquire  additional  shares of common  stock  under  certain
circumstances.  See further discussion of CVRs below. Loss per share, calculated
on a supplemental  basis as if the foregoing event had occurred at the beginning
of 1995,  would have been  $(.19)  for the year ended  December  31,  1995.  The
supplemental  earnings per share assumes that  interest  expense would have been
reduced by $456,000 from the prepayment of $5,300,000 of long-term debt from the
proceeds of the issuance of the units for the year ended December 31, 1995.

Contingent Value Rights

      The CVRs were issued  under the CVR  Agreement  between the  Company,  the
purchasers,  and a rights agent.  The CVR Agreement  provides  that,  subject to
adjustment  as  described  below,  the  Company  shall issue for each CVR on the
Extended  Maturity Date (November 17, 1997), a number of shares of common stock,
if any,  equal to (a) the Target Price  ($12.50 on the Extended  Maturity  Date)
minus  the  current  market  value  divided  by (b) the  current  market  value,
provided,  however,  that in no event shall more than 1.5 shares of common stock
be  issued  in  exchange  for  each  CVR at the  Extended  Maturity  Date.  Such
determination  by the Company  shall be final and binding on the Company and the
holders of CVRs.

      If the  median of the  average  prices of the  common  stock for the three
20-trading day periods immediately  preceding the Extended Maturity Date, equals
or exceeds  $12.50 on the Extended  Maturity Date, no shares of the common stock
will be issuable with respect to the CVRs. In addition,  the CVRs will terminate
if the per share  market value equals or exceeds the Target Price for any period
of 30  consecutive  trading  days during the period from and after  November 17,
1996 to and including November 17, 1997.

                                      F-20
<PAGE>

      On June 20, 1997,  the CVRs expired with no issuance of additional  shares
under the CVR Agreement.

Convertible Preferred Stock

      In June 1994,  in  connection  with an  acquisition,  45,741 shares of the
Company's Series B 8%, nonvoting cumulative  convertible  preferred stock with a
par value of $100 were issued. The preferred shares are convertible into 508,183
shares of the Company's  common stock.  Preferred stock dividends during each of
1995 and 1996  amounted to $366,000  and,  during  1997,  amounted to  $183,000.
During  1995,  the  Company  exchanged  the  Series B 8%,  nonvoting  cumulative
convertible  preferred  stock for an equal  number  of  shares of Series  1995-B
cumulative  convertible preferred stock which have a par value of $.01 per share
and a stated value of $100 per share. Effective July 1, 1997, the holders of the
Company's  preferred  stock  converted all of such shares into 508,183 shares of
the Company's  common stock. The Board of Directors of the Company is authorized
to approve the  issuance  of one or more  classes or series of  preferred  stock
without further authorization of the Company's stockholders.

Treasury Stock

      In March 1996, the Board of Directors  authorized the purchase in the open
market of up to 500,000 shares of the Company's  outstanding  common stock,  the
aggregate purchase price not to exceed $3,500,000.

      During the year ended  December 31,  1996,  the Company  purchased  74,640
shares  of its  common  stock at a cost of  $405,000,  which  were  recorded  as
treasury stock. No shares were purchased during 1997.

6.  Stock Option Plans and Warrants

Stock Options

      The Company grants options to its officers,  directors,  and key employees
under its 1984 Incentive Stock Option Plan, Non-Qualified Stock Option Plan, Key
Contributor  Stock Option Plan,  Long-Term  Incentive  Plan,  and Director Stock
Option Plan.

      The Company has elected to follow Accounting  Principles Board Opinion No.
25,   "Accounting   for  Stock  Issued  to  Employees"   (APB  25)  and  related
Interpretations  in  accounting  for its  employee  stock  options  because,  as
discussed below,  the alternative fair value accounting  provided for under FASB
Statement No. 123,  "Accounting for Stock-Based  Compensation,"  requires use of
option  valuation  models that were not  developed  for use in valuing  employee
stock  options.  Under  APB 25,  because  the  exercise  price of the  Company's
employee stock options  equals the market price of the  underlying  stock on the
date of grant, no compensation expense is recognized.

      The  Company's  various  stock option plans have  authorized  the grant of
options to management and directors personnel for up to approximately  1,395,000
shares of the Company's  common stock.  All options  granted have ten year terms
and vest and become fully  exercisable  over four years of continued  service at
25% on each  anniversary  date.  At December  31,  1997,  approximately  467,000
options remain available for grant.

      Pro forma  information  regarding  net  income and  earnings  per share is
required  by  Statement  123,  which  also  requires  that  the  information  be
determined  as if the Company  has  accounted  for its  employee  stock  options
granted  subsequent  to December  31,  1994 under the fair value  method of that
Statement.  The fair value for these  options was estimated at the date of grant
using a Black-Scholes  option pricing model with the following  weighted-average
assumptions for 1995, 1996, and 1997, respectively:  risk-free interest rates of
6.25%,  dividend yields of -0-%; volatility factors of the expected market price
of the  Company's  common  stock of .383,  .383 and  .529,  respectively;  and a
weighted-average expected life of the option of six years.


                                      F-21
<PAGE>

      The  Black-Scholes  option  valuation  model  was  developed  for  use  in
estimating the fair value of traded  options which have no vesting  restrictions
and are fully  transferable.  In addition,  option  valuation models require the
input of highly  subjective  assumptions  including  the  expected  stock  price
volatility.  Because the Company's  employee stock options have  characteristics
significantly different from those of traded options, and because changes in the
subjective input assumptions can materially  affect the fair value estimate,  in
management's  opinion, the existing models do not necessarily provide a reliable
single measure of the fair value of its employee stock options.

      For purposes of pro forma  disclosures,  the  estimated  fair value of the
options is amortized to expense over the options' vesting period.  The Company's
pro forma  information  follows  (in  thousands  except for  earnings  per share
information):

                                            1995       1996      1997
                                         --------------------------------
                                                 (In thousands)

   Pro forma net income (loss) .........   $(1,286)   $ 1,250   $(7,325)
   Pro forma net income (loss) per         
     common share ......................   $ (.36)    $   .15   $ (1.25)
   Pro forma net income (loss) per
     common share - assuming dilution ..   $ (.36)    $   .13   $ (1.25)

      A summary of the Company's stock option activity,  and related information
for the years ended December 31, follows:

                          1995                 1996                 1997
                  --------------------- -------------------- -------------------
                           Weighted             Weighted             Weighted
                            Average             Average              Average 
                  Options  Exercise    Options  Exercise    Options  Exercise
                  (000s)    Price      (000s)   Price(1)    (000s)    Price
                  ------- ------------- -------------------- -------------------

Outstanding-beginning
  of year ........  103        $ 7.93      219     $ 6.71 (1)   551     $ 6.63
Granted ..........  158          9.50      358       6.58       285      11.26
Exercised ........    -            -        (2)      6.75        (2)      5.50
Forfeited ........  (42)         9.86      (24)      9.21         -         -
                  -------               -------              -------

Outstanding-end    
  of year ........  219        $ 8.69      551     $ 6.63       834     $ 8.27
                  =======               =======              =======

Exercisable at       
  end of year ....   53        $ 8.06       93     $ 6.65       222     $ 6.66
                  =======               =======              =======

Weighted-average
  fair value of
  options granted             
  during the year              $ 2.85              $ 3.46               $ 8.00

      Exercise  prices for options  outstanding  as of December  31, 1997 ranged
from $5.00 to $13.62. The weighted-average  remaining  contractual life of those
options is 8.4 years.

      (1) In March 1996,  the Company  amended the  exercise  price to $6.75 per
   share on all  previously  issued  options with an exercise price greater than
   $6.75 per share.

Stock Awards

      In addition to stock options granted under the plans described  above, the
Long-Term Incentive Plan also provides for the right to receive  compensation in
cash, awards of common stock, or a combination thereof. In 1995, 1996, and 1997,
the Company made direct awards of common stock of 4,800 shares, 1,000 shares and
14,748 shares, respectively, at weighted average fair values of $9.40, $5.00 and
$10.75 per share, respectively.

                                      F-22
<PAGE>

      The Company also has adopted the Restricted Share Plan for Directors which
provides for awards of common stock to nonemployee  directors of the Company who
did  not,  within  the  year  immediately  preceding  the  determination  of the
director's  eligibility,  receive any award under any other plan of the Company.
In 1995, 1996, and 1997, the Company made direct awards of common stock of 3,072
shares,  4,050 shares and 7,235 shares,  respectively,  at weighted average fair
values of $9.40, $6.25 and $9.87 per share, respectively.

      During 1996,  the Company's  stockholders  approved the Abraxas  Petroleum
Corporation  Director  Stock Option Plan (Plan),  which  authorizes the grant of
nonstatutory  options to acquire an aggregate of 104,000  common shares to those
persons who are directors and not officers of the Company.  During 1996, each of
the seven  eligible  directors  was granted an option to purchase  8,000  common
shares at $6.75.  These options are included in the above table. No options were
granted during 1997.

Stock Warrants

      In connection  with an amendment to one of the Company's  previous  credit
agreements,  the Company granted stock warrants to the lender  covering  424,000
shares of its common  stock at an average  price of $9.79 a share.  The warrants
are   exercisable   in  whole  or  in  part  through   December   1999  and  are
nontransferable  without the consent of the  Company.  During  1997,  the lender
exercised  212,000 of its  warrants  on a cashless  basis and was issued  97,810
shares of the Company's common stock.

      Additionally,  warrants to purchase 13,500 shares of the Company's  common
stock at $7.00 per share remain outstanding from previous grants.

      At December  31,  1997,  the Company has  approximately  4,700,000  shares
reserved for future  issuance for  conversion  of its stock  options,  warrants,
Rights, and incentive plans for the Company's directors and employees.

7.  Income Taxes

      Deferred income taxes reflect the net tax effects of temporary differences
between the carrying  amounts of assets and liabilities for financial  reporting
purposes and the amounts used for income tax purposes. Significant components of
the Company's deferred tax liabilities and assets are as follows:

                                                          December 31
                                                      --------------------
                                                        1996      1997
                                                      --------------------
                                 (In thousands)
   Deferred tax liabilities:
     Full cost pool, including intangible
      drilling costs ................................. $34,298   $31,128
     State taxes .....................................     187        67
     Other ...........................................      61       103
                                                      --------------------
   Total deferred tax liabilities ....................  34,546    31,298
   Deferred tax assets:
     Depletion .......................................     431       930
     Net operating losses ............................   6,831     8,520
     Other ...........................................      12        12
                                                      --------------------
   Total deferred tax assets .........................   7,274     9,462
   Valuation allowance for deferred tax assets .......  (5,656)   (5,915)
                                                      --------------------
   Net deferred tax assets ...........................   1,618     3,547
                                                      --------------------
   Net deferred tax liabilities ...................... $32,928   $27,751
                                                      ====================


                                      F-23
<PAGE>



      Significant  components of the provision (benefit) for income taxes are as
follows:

                                                        1996      1997
                                                      -------------------

   Current:
     Federal ......................................     $  -    $   -
     State ........................................        -        -
     Foreign ......................................      176        244
                                                      -------------------
                                                        $176    $   244
                                                      ===================

   Deferred:
     Federal ......................................     $  -    $   -
     State ........................................        -        -
     Foreign ......................................        -     (4,135)
                                                      -------------------
                                                        $  -    $(4,135)
                                                      ===================

      At  December  31,  1997,  the  Company  had,  subject  to the  limitations
discussed below,  $25,059,000 of net operating loss  carryforwards  for U.S. tax
purposes,  of which it is  estimated  a maximum of  $22,353,000  may be utilized
before it expires.  These loss  carryforwards will expire from 2002 through 2010
if not utilized. At December 31, 1997, the Company had approximately  $2,943,000
of net operating loss  carryforwards for Canadian tax purposes of which $830,000
will expire in 2003 and $2,113,000 will expire in 2004.

      As a result of the acquisition of certain partnership  interests and crude
oil and natural gas  properties  in 1990 and 1991,  an  ownership  change  under
Section 382 of the Internal  Revenue  Code of 1986,  as amended  (Section  382),
occurred in December 1991. Accordingly,  it is expected that the use of the U.S.
net  operating  loss  carryforwards  generated  prior to  December  31,  1991 of
$4,909,000 will be limited to approximately $235,000 per year.

      During 1992, the Company acquired 100% of the common stock of an unrelated
corporation.  The use of net operating loss carryforwards of $1,121,000 acquired
in the acquisition are limited to approximately $115,000 per year.

      As a result of the  issuance  of  additional  shares  of common  stock for
acquisitions  and sales of common stock,  an additional  ownership  change under
Section 382 occurred in October 1993.  Accordingly,  it is expected that the use
of all U.S. net operating  loss  carryforwards  generated  through  October 1993
(including those subject to the 1991 and 1992 ownership changes discussed above)
of $8,224,000 will be limited to approximately  $1,034,000 per year,  subject to
the lower  limitations  described  above.  Of the  $8,224,000 net operating loss
carryforwards  existing at October 1993, it is anticipated  that the maximum net
operating  loss that may be  utilized  before it expires is  $5,692,000.  Future
changes in ownership may further limit the use of the Company's carryforwards.

      In addition to the Section 382 limitations,  uncertainties exist as to the
future  utilization of the operating loss  carryforwards  under the criteria set
forth under FASB  Statement No. 109.  Therefore,  the Company has  established a
valuation  allowance of  $5,656,000  and  $5,915,000  for deferred tax assets at
December 31, 1996 and 1997, respectively.


                                      F-24
<PAGE>








      The  reconciliation  of income tax  attributable to continuing  operations
computed at the U.S. federal statutory tax rates to income tax expense is:

                                             December 31
                             --------------------------------------------
                                 1995           1996           1997
                             -------------- -------------- --------------
                                           (In thousands)

   Tax (expense) benefit
     at U.S. statutory          
     rates (34%) ..........     $     411      $    (743)     $   3,414
   (Increase) decrease in
     deferred tax asset             
     valuation allowance ..          (174)            (1)          (259)
   Higher effective rate
     of foreign operations              -            (49)          (244)
   Percentage depletion ...             -            189            499
   Other ..................          (237)           428            481
                             -------------- -------------- --------------

                                $       -      $    (176)     $   3,891
                             ============== ============== ==============

8.  Related Party Transactions

      Accounts receivable from affiliates,  officers, and stockholders represent
amounts  receivable  relating to joint interest billings on properties which the
Company operates and advances made to officers.

      In connection  with a note payable to the Company's  President,  principal
and interest  payments amounted to $355,000 in the year ended December 31, 1995.
The note was fully paid in 1995.

      Wind River Resources  Corporation ("Wind River"), all of the capital stock
of which is owned by the Company's President,  owns a twin-engine airplane.  The
airplane is available  for business use by employees of the Company from time to
time at $385 per hour. The Company paid Wind River a total of $81,000,  $101,000
and $330,000 for use of the plane during 1995, 1996 and 1997, respectively.

      The Company's President and certain directors of the Company were founders
of Grey Wolf and in April 1995 purchased  900,000 shares of the capital stock of
Grey  Wolf  (initially  representing  39%  of  the  outstanding  shares)  for an
aggregate of CDN$90,000  (or CDN$0.10 per share) in cash.  In January 1996,  the
Company  purchased   20,325,096  shares  of  the  capital  stock  of  Grey  Wolf
(representing  78% of the  outstanding  shares) for an aggregate  of  $3,000,000
(approximately CDN$4.1 million or CDN$.20 per share) in cash.

      In  January  1996,  Grey Wolf  purchased  newly  issued  shares of Cascade
representing 66 2/3% of Cascade's capital stock. As described in Note 2, in 1997
Grey  Wolf  merged  with  Cascade.  At  December  31,  1997,  the  Company  owns
approximately  46% of  Cascade.  The  Company's  President  as well  as  certain
directors  directly own approximately 5% of Cascade.  Additionally the Company's
President owns options to purchase up to 800,000 shares of Cascade capital stock
at an  exercise  price of  CDN$.20  per  share,  and  certain  of the  Company's
directors  own options to purchase in the  aggregate up to  1,000,000  shares of
Cascade  capital  stock at an  exercise  price of  CDN$.20  per  share.  Cascade
currently has 76,981,000  shares,  including special warrants,  of capital stock
outstanding.

      Cascade owns a 10% interest in the Canadian Abraxas oil and gas properties
and the Canadian Abraxas gas processing plants and an 8% interest in the Pacalta
Properties  and  manages  the  operations  of  Canadian  Abraxas,  pursuant to a
management agreement between Canadian Abraxas and Cascade.  Under the management
agreement,  Canadian Abraxas reimburses Cascade for reasonable costs or expenses
attributable to Canadian Abraxas and for administrative  expenses based upon the
percentage that Canadian Abraxas' gross revenue bears to the total gross revenue
of Canadian Abraxas and Cascade.

                                      F-25
<PAGE>


9.  Commitments and Contingencies

Operating Leases

      During the years ended  December 31,  1995,  1996,  and 1997,  the Company
incurred  rent  expense  of  approximately  $103,000,   $179,000  and  $228,000,
respectively.  Future  minimum  rental  payments  are as follows at December 31,
1997:

   1998 ....................................................   $289,000
   1999 .....................................................   290,000
   2000 .....................................................   306,000
   2001 .....................................................   354,000
   2002 .....................................................   247,000
   Thereafter ...............................................   854,000

Contingencies

      In May 1995,  certain  plaintiffs  filed a  lawsuit  against  the  Company
alleging negligence and gross negligence,  tortious  interference with contract,
conversion  and waste.  In March 1998,  a jury found  against the Company in the
amount of $1,332,000 plus attorneys' fees and pre-judgment interest.

      As of March 1998,  no judgment had been  entered.  The Company  intends to
file   various   post-judgment   motions   including   a  motion  for   judgment
notwithstanding  the verdict  and a motion for new trial,  as well as an appeal.
Management believes,  based on the advice of legal counsel, that the plaintiffs'
claims are without merit and that damages should not be  recoverable  under this
action;  however,  the ultimate effect on the Company's  financial  position and
results of operations  cannot be  determined  at this time.  The Company has not
established a reserve for this matter at December 31, 1997.

      Additionally,  from time to time,  the Company is  involved in  litigation
relating  to  claims  arising  out of its  operations  in the  normal  course of
business.  At  December  31,  1997,  the  Company  was not  engaged in any legal
proceedings  that are  expected,  individually  or in the  aggregate,  to have a
material adverse effect on the Company.


                                      F-26
<PAGE>

10.  Earnings per Share

      The  following  table  sets  forth the  computation  of basic and  diluted
earnings per share:

                                         1995        1996        1997
                                      ----------- ----------- -----------

Numerator:
  Net income (loss)                  $(1,208,000) $1,513,000  $(6,485,000)
  Preferred stock dividends              366,000     366,000      183,000
                                      ----------- ----------- -----------
  Numerator for basic earnings per
    share - income (loss) available   
    to common stockholders            (1,574,000)  1,147,000   (6,668,000)
 
  Effect of dilutive securities:
    Preferred stock dividends                  -          -            -
                                      ----------- ----------- -----------

  Numerator for diluted earnings per
    share - income available to
    common stockholders after assumed 
    conversions                       (1,574,000)  1,147,000   (6,668,000)

Denominator:
  Denominator for basic earnings per
    share - weighted-average shares    4,635,412   5,757,105    6,025,294

  Effect of dilutive securities:
    Stock options and warrants                 -      24,277           -
   Convertible preferred stock                 -          -            -
   Assumed issuance under the CVR              -   1,013,060           -
     Agreement
                                      ----------- ----------- -----------
                                               -   1,037,337           -
                                      ----------- ----------- -----------

  Dilutive potential common shares
    Denominator for diluted earnings
    per share - adjusted
    weighted-average shares and       
    assumed conversions                 4,635,412  6,794,442    6,025,294

  Basic earnings (loss) per share:
    Income (loss) before              
    extraordinary item                 $     (.34)  $    .27    $   (1.11)   
    Extraordinary item                        -         (.07)          -
                                      =========== =========== ===========
                                       $     (.34)  $    .20    $   (1.11)
                                      =========== =========== ===========

  Diluted earnings (loss) per share:
    Income (loss) before                
    extraordinary item                 $     (.34)  $    .23    $   (1.11)
    Extraordinary item                         -        (.06)          -
                                      =========== =========== ===========
                                       $     (.34)  $    .17    $   (1.11)
                                      =========== =========== ===========

      For additional  disclosures  regarding the preferred stock, CVRs, employee
stock options, and warrants, see Notes 5 and 6.

      For the  years  ended  December  31,  1995 and  1997,  none of the  shares
issuable in connection  with stock  options,  warrants,  conversion of preferred
stock or the CVR  Agreement are included in diluted  shares.  Inclusion of these
shares would be antidilutive due to losses incurred in those years. In addition,
for the year ended  December  31, 1996 shares  issuable in  connection  with the
conversion of the preferred  stock were not included in diluted  shares  because
the effect was antidilutive.

                                      F-27
<PAGE>



      Stock  options and warrants to purchase  approximately  875,000  shares of
common  stock at a weighted  average per share  price of $8.36 were  outstanding
during 1996 but were not included in the  computations  of diluted  earnings per
share  because the options' and  warrants'  exercise  price was greater than the
average  market price of the common shares and,  therefore,  the effect would be
antidilutive.

11.  Quarterly Results of Operations (Unaudited)

      Selected  results of operations for each of the fiscal quarters during the
years ended December 31, 1996 and 1997 are as follows:
<TABLE>
<CAPTION>

                                                          1st          2nd      3rd         4th
                                                        Quarter      Quarter   Quarter     Quarter
                                                       ----------- ---------- ---------- -----------
                                                           (In thousands, except per share data)
<S>                                                     <C>        <C>         <C>         <C>     
Year Ended December 31, 1996
  Net revenue .......................................   $  4,477   $  3,305    $  3,616    $ 15,255
  Operating income ..................................      1,486        365         744       6,231
  Income (loss) before
   extraordinary item ...............................        599       (240)       (236)      1,817
  Net income (loss) .................................        599       (240)       (605)      1,759
  Earnings (loss) per
   common share:
     Income (loss) before
      extraordinary item ............................        .09       (.04)       (.04)        .30
     Net income (loss)
      per common share ..............................        .09       (.04)       (.10)        .29

  Earnings (loss) per common share assuming dilution:
     Income (loss) before
      extraordinary item ............................        .08       (.04)       (.04)        .25
     Net income (loss)
      per common share - ............................        .08       (.04)       (.10)        .24
      assuming dilution .............................

Year Ended December 31, 1997
  Net revenue .......................................   $ 19,216   $ 15,772    $ 15,703    $ 20,240
  Operating income (loss)............................      7,791      4,090       3,902        (633)
  Net income (loss) .................................      1,454     (2,010)     (2,042)     (3,887)
  Earnings (loss) per
   common share .....................................        .24       (.37)       (.33)       (.61)
  Earnings (loss) per
   common share - assuming dilution .................        .22       (.37)       (.33)       (.61)
   

</TABLE>

      During  the  fourth  quarter  of  1996,  the  Company   completed  several
acquisitions  as described in Note 2 which  affected net revenues,  gross profit
and net income.

      During the fourth  quarter of 1997,  the Company  recorded a write-down of
its  Canadian  proved  crude oil and natural  gas  properties  of  approximately
$4,600,000, $3,000,000, net of taxes, under the ceiling limitation.

      Certain previously reported financial information has been reclassified to
conform with the current presentation.


                                      F-28
<PAGE>



12.  Benefit Plans

      The Company has a defined contribution plan (401(k)) covering all eligible
employees of the Company. No contributions were made by the Company during 1995.
During  1996  and  1997,  the  Company   contributed  2,500  and  7,440  shares,
respectively,  of its common stock held in the treasury to the Plan and recorded
the fair value of $12,500 and $41,850,  respectively,  as compensation  expense.
The employee contribution limitations are determined by formulas which limit the
upper one-third of the plan members from  contributing  amounts that would cause
the plan to be top-heavy.  The overall  contribution is limited to the lesser of
20% of the employee's annual compensation or $9,240.

      In January 1995,  the Company  created the Technical  Employees  Incentive
Bonus Plan,  whereby  technical  employees have an incentive to find and develop
crude oil and  natural  gas  reserves on an  economic  basis  beneficial  to the
Company  and  its  shareholders.   Participants  are  any  technical   employees
(geologist, geophysicist, engineer) not covered by another incentive bonus plan.
A participant may earn a monetary bonus of up to 65% of the  participant's  base
salary each year.  The bonuses are  determined in the first quarter of each year
and are based upon the amount of new proved developed  producing reserves booked
each  year  on  approved  exploration  and  exploitation  projects  taking  into
consideration the cost per equivalent barrel of developing the new reserves.
During 1995, 1996, and 1997, the Company incurred no bonus expense.

13. Summary Financial Information of Canadian Abraxas Petroleum Ltd.

      The following is summary  financial  information  of Canadian  Abraxas,  a
wholly  owned  subsidiary  of the  Company.  Canadian  Abraxas  is  jointly  and
severally liable for the entire balance of the Series B Notes ($215,000,000), of
which  $84,612,000  was  utilized by  Canadian  Abraxas in  connection  with the
acquisition of CGGS. The Company has not presented separate financial statements
and  other  disclosures  concerning  Canadian  Abraxas  because  management  has
determined that such information is not material to the holders of the Notes.


                                                           December 31,
                                                         1996         1997
                                                      -----------  -----------
                                                          (In thousands)
   BALANCE SHEET
   Assets
   Total current assets ............................   $  6,174     $  4,738
   Oil and gas and processing properties ...........    115,671      109,968
   Other assets ....................................      3,302        3,761
                                                      ===========  ===========
                                                       $125,147     $118,467
                                                      ===========  ===========

   Liabilities and Stockholder's Equity
   Total current liabilities .......................   $  3,624     $  3,625
   11.5% Senior Notes due 2004 .....................     84,612       74,682
   Notes payable to Abraxas Petroleum Corporation ..          -       18,844
   Other liabilities ...............................     34,797       30,295
   Stockholder's equity (deficit) ..................      2,114       (8,979)
                                                      -----------  -----------
                                                       $125,147     $118,467
                                                      ===========  ===========



                                      F-29
<PAGE>



                                            November 14,
                                           1996, Date of
                                            Acquisition,    Year Ended
                                                 to        December 31,
                                            December 31,       1997
                                                1996
                                           --------------- --------------
                                                  (In thousands)
   STATEMENTS OF OPERATIONS
   Revenues ...............................   $ 3,972          $19,264
   Operating costs and expenses ...........    (2,292)         (16,617)
   Proved property impairment .............         -           (4,600)
   Interest expense .......................    (1,331)          (9,952)
   Other income ...........................        23              202
   Income tax (expense) benefit ...........      (175)           3,815
                                           --------------- --------------
     Net income (loss) ....................   $   197          $(7,888)
                                           =============== ==============

14.  Business Segments

      The Company  conducts its operations  through two industry  segments,  the
exploration for and the acquisition, development and production of crude oil and
natural  gas (E&P) and the  processing  of  natural  gas  (Processing).  The E&P
segment  acquires and explores  for,  develops,  produces and markets crude oil,
condensate,  natural  gas  liquids  and  natural  gas.  The  Processing  segment
processes  natural gas owned by third  parties.  The Company's  significant  E&P
operations  are  located in the Texas Gulf Coast,  the Permian  Basin of western
Texas,  Canada and Wyoming.  The Processing segment engages in the processing of
natural gas.  Natural gas processing  involves the custom  processing of natural
gas for third parties. Segment income excludes interest income, interest expense
and unallocated general corporate expenses. Identifiable assets are those assets
used in the operations of the segment.  Corporate  assets  consist  primarily of
deferred financing fees and other property and equipment. The Company's revenues
are  derived  primarily  from the sale of crude  oil,  condensate,  natural  gas
liquids and natural gas to marketers and refiners and from  processing fees from
the custom  processing  of natural gas. As a general  policy,  collateral is not
required for  receivables;  however,  the credit of the  Company's  customers is
regularly  assessed.  The  Company is not aware of any  significant  credit risk
relating to its  customers  and has not  experienced  significant  credit losses
associated with such receivables.

      In 1997 three customers accounted for approximately 42% of oil and natural
gas production revenues and two customers accounted for approximately 51% of gas
processing  revenues.  In 1996 four customers accounted for approximately 63% of
oil and  natural gas  production  revenues  and three  customers  accounted  for
approximately 54% of gas processing revenues. In 1995 one customer accounted for
approximately 20% of oil and natural gas production.



                                      F-30
<PAGE>

      Business  segment  information  about the Company's 1996  operations is as
follows:

                                         E&P      Processing    Total
                                      ----------- ----------- -----------
                                                (In thousands)

Revenues .......................        $26,053     $   600     $10,681
                                      =========== =========== ===========

Operating profit ...............        $10,660     $    21     $10,681
                                      =========== ===========
General corporate ..............                                 (2,044)
Interest expense and
  amortization of deferred                                       
  financing fees ...............                                 (6,521)
                                                              -----------
  Income from before income                                    
   taxes .......................                                $ 2,116
                                                              ===========

Identifiable assets ............        $253,707    $40,700     $294,407
                                      =========== ===========
Corporate assets ...............                                 10,435
                                                              -----------
  Total assets .................                                $304,842
                                                              ===========

      Depreciation  and  depletion  for E&P  and  Processing  was  approximately
$9,143,000  and  $291,000,  respectively.   Capital  expenditures  for  E&P  and
Processing were $145,600,000 and $27,300,000, respectively.

      Business  segment  information  about the Company's 1997  operations is as
follows:

                                         E&P      Processing    Total
                                      ----------- ----------- -----------
                                                (In thousands)

Revenues .......................        $67,363     $ 3,568     $70,931
                                      =========== =========== ===========

Operating profit ...............        $18,039     $  (226)    $17,813
                                      =========== ===========
General corporate ..............                                 (2,309)
Interest expense and
  amortization of deferred                                      
  financing fees ...............                                (25,880)
                                                              -----------
  Loss before income taxes .....                               $(10,376)
                                                              ===========

Identifiable assets ............        $292,087    $37,159     $329,246
                                      =========== ===========
Corporate assets ...............                                   9,282
                                                              -----------
  Total assets .................                                $338,528
                                                              ===========

      Depreciation  and  depletion  for E&P  and  Processing  was  approximately
$27,813,000  and  $2,310,000,  respectively.  Capital  expenditures  for E&P and
Processing were approximately $84,300,000 and $1,500,000, respectively.

      During 1995 the Company's operations were entirely in the E&P segment.

                                      F-31
<PAGE>
      Business  segment  information  about the  Company's  1996  operations  in
different geographic areas is as follows:

                                     U.S.         Canada        Total
                                 ------------- ------------- -------------
                                               (In thousands)

Revenues .....................     $  21,999     $   4,654     $  26,653
                                 ============= ============= =============

Operating profit .............     $   8,987     $   1,694     $  10,681
                                 ============= =============
General corporate ............                                    (2,044)
Interest expense and
  amortization of deferred                                        
  financing fees .............                                    (6,521)
                                                             =============
  Income before income taxes .                                 $   2,116
                                                             =============
Identifiable assets at             
  December 31, 1997 ..........    $ 168,141      $ 126,266     $ 294,407
                                 ============= =============
Corporate assets .............                                    10,435
                                                             -------------
  Total assets ...............                                 $ 304,842
                                                             =============

      Business  segment  information  about the  Company's  1997  operations  in
different geographic areas is as follows:

                                     U.S.         Canada        Total
                                 ------------- ------------- -------------
                                               (In thousands)

Revenues .....................     $  50,172     $  20,759     $  70,931
                                 ============= ============= =============

Operating profit (loss).......     $  19,938     $  (2,125)    $  17,813
                                 ============= =============
General corporate ............                                    (2,309)
Interest expense and
  amortization of deferred                                       
  financing fees .............                                   (25,880)
                                                             =============
  Loss before income taxes ...                                 $ (10,376)
                                                             =============
Identifiable assets at             
  December 31, 1997 ..........    $ 198,277     $ 130,969      $ 329,246
                                 ============= =============
Corporate assets .............                                     9,282
                                                             -------------
  Total assets ...............                                 $ 338,528
                                                             =============

      During 1995 the Company's operations were entirely in the United States.

15.  Commodity Swap Agreements

      In order to manage its  exposure  to price risks in the  marketing  of its
crude oil and natural  gas, the Company from time to time has entered into fixed
price delivery contracts,  financial swaps and crude oil and natural gas futures
contracts as hedging devices. To ensure a fixed price for future production, the
Company may sell a futures  contract  and  thereafter  either (i) make  physical
delivery of crude oil or natural gas to comply with such  contract or (ii) buy a
matching futures contract to unwind its futures position and sell its production
to a customer.  Such  contracts  may expose the Company to the risk of financial
loss in certain circumstances, including instances where production is less than
expected,  the Company's  customers  fail to purchase or deliver the  contracted
quantities of crude oil or natural gas, or a sudden, unexpected event materially
impacts  crude oil or natural gas prices.  Such  contracts may also restrict the
ability of the Company to benefit  from  unexpected  increases  in crude oil and
natural gas prices.

       Pursuant  to  certain  hedge  agreements,   either  the  Company  or  the
counterparty thereto is required to make payment to the other at the end of each


                                      F-32
<PAGE>

month.  During the period from March 1996 through  November 1996,  payments were
exchanged  equal to the  product of 5,000  MMBtu of natural  gas per day and the
difference  between a specified fixed price and a variable price for natural gas
based on the arithmetic average of the last three trading days' settlement price
quoted for natural gas contracts on the New York  Mercantile  Exchange  (NYMEX).
This  hedge  agreement  provided  for  the  Company  to  make  payments  to  the
counterparty  to the extent  that the market  price  exceeds  the fixed price of
$1.747 per MMBtu and for the counterparty to make payments to the Company to the
extent the market  price was less than $1.747 per MMBtu.  A loss of $511,000 was
incurred during the period of hedged production.

      In November 1996, the Company assumed Hedge Agreements  extending  through
October 2001 with a counterparty involving the following notional quantities and
fixed prices:

                            Crude Oil                 Natural Gas
                    ------------------------------------------------------
                      Notional                   Notional
                      Quantity       Fixed       Quantity       Fixed
                     per Month       Price      per Month       Price
                     (barrels)      (barrel)     (MMBtu)       (MMBtu)
                    ------------- -------------------------- -------------

   1997                15,810        $ 17.20      53,712        $  1.797
   1998                13,175        $ 17.20      36,601        $  1.793
   1999                11,050        $ 17.47      24,489        $  1.820
   2000                 9,180        $ 17.78      18,794        $  1.872
   2001                 8,160        $ 18.08      14,850        $  1.902

      These hedge  agreements  provide  for the Company to make  payments to the
counterparty to the extent the market prices  determined  based on the price for
west Texas intermediate light sweet crude oil on the NYMEX for crude oil and the
Inside FERC,  Tennessee Gas Pipeline  Co.;  Texas (Zone O) price for natural gas
exceeds the above fixed prices and for the  counterparty to make payments to the
Company to the extent the market  prices are less than the above  fixed  prices.
The Company accounts for the related gains or losses (a loss of $453,000 in 1996
and a loss of  $952,000  in 1997) in crude oil and  natural  gas  revenue in the
period of the hedged production.  The average notional quantity of crude oil and
natural  gas  under  the  hedge  agreements  each  month  for  1998 is  equal to
approximately  15% and 1.5%,  respectively,  of the Company's  expected  monthly
production for 1998 based on the Company's  January 1, 1998 reserve reports.  At
December 31, 1997, the estimated fair market value of the hedge  agreements is a
loss of approximately $700,000.

16.  Proved Property Impairment

      In 1997 the  Company  recorded a  write-down  of its proved  crude oil and
natural gas  properties of  approximately  $4,600,000,  $3,000,000  after taxes,
under the ceiling  limitation  prescribed for companies  following the full cost
method of accounting for its oil and gas properties.  The write-down was related
to the  Company's  Canadian  cost center and was due  primarily to a decrease in
spot market prices for its crude oil and natural gas. Under full cost accounting
rules,  the  net  capitalized  costs  of oil and gas  properties,  less  related
deferred taxes, are limited by country,  to the lower of unamortized cost or the
cost  ceiling as discussed in Note 1. The risk that the Company will be required
to  write-down  the carrying  value of its crude oil and natural gas  properties
increases  when crude oil and  natural  gas prices are  depressed  or  volatile.
Should prices continue to decline,  a further  write-down of the Company's crude
oil and natural gas properties may be required.  If such a write-down were large
enough,  it could  result in the  occurrence  of an event of  default  under the
Credit  Facility that could require the sale of some of the Company's  producing
properties under  unfavorable  market  conditions or require the Company to seek
additional equity capital.

17.  Subsequent Event

      In November 1997, the Company entered into an agreement and plan of merger
(agreement) to purchase all of the outstanding  capital stock of Vessels Energy,


                                      F-33
<PAGE>

Inc. (Vessels) in exchange for common stock of the Company,  which agreement was
subject  to  stockholder  approval  of both  companies.  In  February  1998  the
agreement was not approved by the Vessels  stockholders  and was terminated.  In
accordance  with the termination  provisions of the agreement,  Vessels paid the
Company  a fee  of  $1,500,000.  The  Company  incurred  approximately  $519,000
($274,000  through  December  31,  1997  which is  included  in  other  accounts
receivable)  of expenses in connection  with the  negotiation  of the agreement.
Such cost will be offset  against  the fee  received  from  Vessels,  which will
result  in a gain of  approximately  $981,000  in  1998.  Additionally,  through
December  31,  1997,  the  Company  incurred  approximately  $133,000,  which is
included in other  accounts  receivable,  in drilling  costs in connection  with
farm-out  agreements  with  Vessels  which is to be  reimbursed  to the  Company
subsequent to December 31, 1997.

18.  Supplemental Oil and Gas Disclosures (Unaudited)

      The accompanying table presents information concerning the Company's crude
oil and natural gas  producing  activities  as required by Financial  Accounting
Standards 69, "Disclosures about Oil and Gas Producing Activities."  Capitalized
costs relating to oil and gas producing activities are as follows:

                                                    December 31
                                            -----------------------------
                                                1996           1997
                                            -------------- --------------
                                                   (In thousands)

   Proved crude oil and natural gas            $231,090       $332,680
     properties .........................
   Unproved properties ..................        37,268         11,519
                                            -------------- --------------
     Total ...............................      268,358        344,199
   Accumulated depreciation, depletion,
     and amortization, and impairment ...       (38,368)       (70,717)
                                            -------------- --------------
      Net capitalized costs .............      $229,990       $273,482
                                            ============== ==============



                                      F-34
<PAGE>

      Costs  incurred  in oil and gas  property  acquisitions,  exploration  and
development activities are as follows:
<TABLE>
<CAPTION>

                                                             Years Ended December 31
                          ----------------------------------------------------------------------------------------------
                                       1995                            1996                           1997
                          ------------------------------- --------------------------------------------------------------
                            Total     U.S.      Canada      Total     U.S.      Canada     Total      U.S.     Canada
                          -------------------- ---------- -------------------- -------------------- --------------------
                                                                 (In thousands)
<S>                         <C>       <C>        <C>        <C>       <C>        <C>       <C>        <C>       <C>   
  Property acquisition
   costs:
   Proved ..............    $  719   $   719     $    -     $87,005   $37,609    $49,396   $13,800    $    -    $13,800
   Unproved ............         -         -          -      37,268     8,230     29,038     8,958          -     8,958
                          -------------------- ---------- -------------------- -------------------- --------------------

                            $  719   $   719     $    -    $124,273   $45,839    $78,434   $22,758    $    -    $22,758
                          ==================== ========== ==================== ==================== ====================

  Property development
   and exploration costs    $11,398  $11,398     $    -    $ 18,133   $18,115    $    18   $61,414    $53,363   $ 8,051
                          ==================== ========== ==================== ==================== ====================
</TABLE>
<TABLE>
<CAPTION>

      The results of  operations  for oil and gas  producing  activities  are as
follows:

                                                             Years Ended December 31
                          ----------------------------------------------------------------------------------------------
                                       1995                            1996                           1997
                          ------------------------------- --------------------------------------------------------------
                            Total     U.S.      Canada      Total     U.S.      Canada     Total      U.S.     Canada
                          -------------------- ---------- -------------------- -------------------- --------------------
                                                                 (In thousands)

<S>                         <C>       <C>        <C>        <C>       <C>        <C>       <C>        <C>       <C>    
  Revenues ..........       $13,660   $13,660    $    -     $25,749   $21,758    $3,991    $65,826    $49,031   $16,795
  Production costs ..        (4,333)   (4,333)        -      (5,858)   (5,193)     (665)   (14,881)   (10,749)   (4,132)
  Depreciation,
   depletion, and
   amortization .....        (5,313)   (5,313)        -      (9,103)   (7,695)   (1,408)   (27,803)   (18,992)   (8,811)
   amortization .....
  Proved property              
   impairment .......             -         -         -           -         -          -    (4,600)         -    (4,600)
  General and                 
   administrative ...          (261)     (261)        -        (483)     (401)      (82)    (1,042)      (721)     (321)
  Income taxes
   (expense) benefit.            -         -          -        (148)        -      (148)       427          -       427
                          ---------- ---------- ---------- --------- ----------- -------- ----------  --------- --------

  Results of operations
   from oil and gas
   producing activities
   (excluding corporate     
   overhead and
   interest costs) .....    $3,753    $ 3,753    $    -     $10,157   $ 8,469    $1,688    $17,927    $18,569   $  (642)
                         ========== ========== ========== ========= ========== =========  =========  =========  ========  
  Depletion rate per
   barrel of oil           
   equivalent .......       $ 4.67    $  4.67    $    -     $  5.12   $ 5.10     $ 5.29    $  5.62    $ 5.05    $ 6.98
                         ========== ========== ========== ========= ========== =========  =========  =========  ======== 
</TABLE>



                                      F-35


<PAGE>


Estimated Quantities of Proved Oil and Gas Reserves

      The  following  table  presents the  Company's  estimate of its net proved
crude oil and natural gas reserves as of December 31, 1995,  1996, and 1997. The
Company's management  emphasizes that reserve estimates are inherently imprecise
and that estimates of new discoveries are more imprecise than those of producing
oil and gas  properties.  Accordingly,  the  estimates are expected to change as
future  information  becomes  available.  The  estimates  have been  prepared by
independent petroleum reserve engineers.
<TABLE>
<CAPTION>

                                                    Total               United States                Canada
                                            ----------------------- ----------------------- --------------------------
                                               Liquid     Natural      Liquid      Natural     Liquid       Natural
                                            Hydrocarbons    Gas     Hydrocarbons     Gas    Hydrocarbons      Gas
                                            ----------------------- ------------- ------------------------ -----------
                                             (Barrels)     (Mcf)     (Barrels)      (Mcf)     (Barrels)      (Mcf)
                                                                         (In Thousands)

   Proved developed and undeveloped reserves:
<S>                                              <C>      <C>            <C>       <C>            <C>        <C>         
     Balance at December 31, 1994 .....           9,156    67,579         9,156     67,579            -           -
      Revisions of previous estimates .          (1,328)  (18,941)       (1,328)   (18,941)           -           -
      Extensions and discoveries ......           1,335     6,819         1,335      6,819            -           -
      Purchase of minerals in place ...             214     2,889           214      2,889            -           -
      Production ......................            (544)   (3,553)         (544)    (3,553)           -           -
      Sale of minerals in place .......            (566)     (224)         (566)      (224)           -           -
                                            ----------------------- ------------- ------------------------ -----------
     Balance at December 31, 1995 .....           8,267    54,569         8,267     54,569            -           -
      Revisions of previous estimates .             680    (2,561)          680     (2,561)           -           -
      Extensions and discoveries ......           1,752    10,194         1,746     10,060            6         134
      Purchase of minerals in place ...           8,062   121,408         6,694     65,135        1,368      56,273
      Production ......................            (724)   (6,350)         (670)    (5,042)         (54)     (1,308)
      Sale of minerals in place .......              (2)        -            (2)         -            -           -
                                            ----------------------- ------------- ------------------------ -----------
     Balance at December 31, 1996 .....          18,035   177,260        16,715    122,161        1,320(1)   55,099
      Revisions of previous estimates .          (1,083)   (4,554)       (1,096)   (10,343)          13       5,789
      Extensions and discoveries ......           2,262    48,405         2,190     40,877           72       7,528
      Purchase of minerals in place ...             585    27,575           197        150          388      27,425
      Production ......................          (1,929)  (21,050)       (1,736)   (12,508)        (193)     (8,542)
      Sale of minerals in place .......             (93)   (6,322)           (9)       (42)         (84)     (6,280)
                                            ----------------------- ------------- ------------------------ -----------

     Balance at December 31, 1997 .....          17,777   221,314        16,261    140,295        1,516(1)   81,019(2)
                                            ======================= ============= ======================== ===========
</TABLE>

(1) Includes 120,400 and 260,200 barrels of liquid hydrocarbon reserves owned by
Cascade of which approximately  57,600 and 140,200 barrels are applicable to the
minority  interest's  share of these  reserves  at  December  31, 1996 and 1997,
respectively.

(2) Includes  7,446 MMcf of natural gas reserves owned by Cascade of which 4,012
MMcf are  applicable  to the  minority  interest's  share of these  reserves  at
December 31, 1997.


                                      F-36
<PAGE>

<TABLE>
<CAPTION>


Estimated Quantities of Proved Oil and Gas Reserves (continued)

                                                    Total               United States               Canada
                                            ----------------------- ----------------------- -----------------------
                                               Liquid     Natural      Liquid      Natural     Liquid      Natural
                                            Hydrocarbons    Gas     Hydrocarbons     Gas    Hydrocarbons     Gas
                                            ----------------------- ------------- ----------------------- ----------
                                             (Barrels)     (Mcf)     (Barrels)      (Mcf)    (Barrels)      (Mcf)
                                                                        (In Thousands)

   Proved developed reserves:
<S>                                                <C>     <C>            <C>       <C>           <C>       <C>         
     December 31, 1995 ................            6,000   44,026         6,000     44,026            -          -
                                            ======================= ============= ======================= ==========

     December 31, 1996 ................           14,961  157,660        13,641    103,639        1,320     54,021
                                            ======================= ============= ======================= ==========

     December 31, 1997 ................           14,254  186,490        12,750    109,456        1,504     77,034
                                            ======================= ============= ======================= ==========
</TABLE>

      The significant  downward revision in 1995 of previous liquid hydrocarbons
and  natural gas was due  principally  to  decreased  estimates  of  recoverable
reserves in existing wells related to disappointing drilling results principally
in  the  East  White  Point  Field,  resulting  in  reclassification  of  proved
undeveloped reserves to probable reserves.


                                      F-37
<PAGE>



Standardized  Measure of Discounted Future Net Cash Flows Relating to Proved Oil
and Gas Reserves

      The following  disclosures  concerning the standardized  measure of future
cash flows from proved  crude oil and  natural gas  reserves  are  presented  in
accordance  with  Statement  of  Financial  Accounting  Standards  No.  69.  The
standardized  measure does not purport to represent the fair market value of the
Company's proved crude oil and natural gas reserves.  An estimate of fair market
value  would also take into  account,  among  other  factors,  the  recovery  of
reserves not  classified  as proved,  anticipated  future  changes in prices and
costs, and a discount factor more  representative of the time value of money and
the risks inherent in reserve estimates.

      Under the  standardized  measure,  future cash inflows  were  estimated by
applying  period-end  prices  at  December  31,  1997,  adjusted  for  fixed and
determinable escalations,  to the estimated future production of year-end proved
reserves.  Future cash inflows were reduced by estimated  future  production and
development  costs based on year-end  costs to determine  pre-tax cash  inflows.
Future  income  taxes were  computed by applying the  statutory  tax rate to the
excess of pre-tax cash inflows over the tax basis of the  properties.  Operating
loss  carryforwards,  tax  credits,  and  permanent  differences  to the  extent
estimated  to be  available  in the future  were also  considered  in the future
income tax calculations, thereby reducing the expected tax expense.

      Future net cash inflows  after income  taxes were  discounted  using a 10%
annual discount rate to arrive at the Standardized Measure.


                                      F-38
<PAGE>



      Set forth below is the Standardized Measure relating to proved oil and gas
reserves for:
<TABLE>
<CAPTION>

                                                            Years Ended December 31
                        -------------------------------------------------------------- ----------------------------------
                                    1995                            1996                             1997
                        -------------------------------------------------------------- ----------------------------------
                         Total       U.S.     Canada     Total      U.S.     Canada       Total       U.S.      Canada
                        ---------- ------------------------------ -------------------- ----------------------- ----------
                                                                (In thousands)

<S>                      <C>        <C>        <C>       <C>        <C>       <C>        <C>         <C>         <C>     
  Future cash inflows .  $243,969   $243,969   $    -  $1,009,420   $824,776  $184,644    $714,048    $530,627   $183,421
  Future production
    and development
    costs..............   (79,910)   (79,910)       -    (251,749)  (201,498)  (50,251)   (249,604)   (186,445)   (63,159)
  Future income tax
    expense ...........   (28,015)   (28,015)       -    (207,834)  (157,508)  (50,326)    (82,998)    (48,736)   (34,262)
                         ---------- --------- --------- ------------ --------  --------   ---------   ---------  ---------
  Future net cash
    flows .............   136,044    136,044        -     549,837    465,770    84,067     381,446     295,446     86,000
  Discount ............   (48,884)   (48,884)       -    (220,016)  (193,221)  (26,795)   (129,367)   (107,259)   (22,108)
                         ---------- --------- --------- ------------ --------  --------   ---------   ---------  ---------  
  Standardized Measure
    of discounted
    future net cash      
    relating to proved
    reserves ..........  $ 87,160   $ 87,160   $    -  $  329,821   $272,549  $ 57,272    $252,079    $188,187    $63,892
                         ========== ========= ========= ==========  ========  ========   =========   =========   ========  


</TABLE>


                                      F-39
<PAGE>




Changes in Standardized  Measure of Discounted Future Net Cash Flows Relating to
Proved Oil and Gas Reserves

      The following is an analysis of the changes in the Standardized Measure:



                                         Year Ended December 31
                                 ----------------------------------------
                                     1995          1996         1997
                                 ------------- --------------------------
                                             (In thousands)

  Standardized Measure,
    beginning of year.........     $  77,693     $  87,160    $ 329,821
    Sales and transfers of oil
    and gas produced, net of          
    production costs .........        (9,351)      (19,887)     (50,945)
  Net changes in prices and
    development and production        
    costs from prior year ....        22,560        65,917     (190,174)
  Extensions, discoveries, and
    improved recovery, less           
    related costs ............        13,475        30,699       49,471
  Purchases of minerals in             
    place ....................         3,867       244,930       27,586
  Sales of minerals in place .        (3,355)          (24)      (5,720)
  Revision of previous quantity      
    estimates ................       (24,937)        2,257       (8,150)
  Change in future income tax            
    expense ..................           382       (87,393)      70,858
  Other ......................          (943)       (2,554)     (12,389)
  Accretion of discount ......         7,769         8,716       41,721
                                 ------------- ------------  ------------
   Standardized Measure, end of
     year ....................     $  87,160     $ 329,821    $ 252,079
                                 ============= ============  ============


                                      F-40
<PAGE> 



                        AUDITORS' REPORT TO THE DIRECTORS



To the Board of Directors of
Canadian Abraxas Petroleum Ltd.

        We have  audited  the  statements  of  earnings  (loss)  and  changes in
financial  position  for the  years  ended  October  31,  1995  and 1996 of CGGS
Canadian  Gas  Gathering  Systems  Inc.  These  financial   statements  are  the
responsibility of the Company's management.  Our responsibility is to express an
opinion on these financial statements based on our audits.

        We conducted our audits in accordance with generally  accepted  auditing
standards.  Those standards  require that we plan and perform an audit to obtain
reasonable  assurance  whether  the  financial  statements  are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management, as well as evaluating the overall financial statement presentation.

        In our  opinion,  these  financial  statements  present  fairly,  in all
material  respects,  the results of operations of the Company and the changes in
its  financial  position  for the  years  ended  October  31,  1995  and 1996 in
accordance with generally accepted accounting principles.



KPMG
Chartered Accountants

Calgary, Canada
December 16,1997


                                      F-42
<PAGE>
<TABLE>
<CAPTION>



                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                          STATEMENTS OF EARNINGS (LOSS)

                              (In Canadian Dollars)



                                                    Year Ended October 31
                                               --------------------------------
                                                    1995            1996
                                               --------------- ----------------
<S>                                              <C>             <C>  
Revenues:
  Processing ................................    $33,100,000     $36,954,000
  Production ................................     22,408,000      26,791,000
  Royalties, net ............................     (3,366,000)     (3,975,000)
  Other income ..............................        996,000         690,000
                                               --------------- ----------------
                                                  53,138,000      60,460,000

Expenses:
  Processing ................................     14,763,000      19,207,000
  Production ................................      5,689,000       5,308,000
  Administration (note 4) ...................      4,507,000       4,117,000
  Interest on long-term shareholders' debt ..     16,227,000      16,172,000
  Depletion and depreciation ................     13,754,000      14,092,000
  Amortization of deferred financing costs ..        146,000         146,000
  Foreign exchange loss .....................        795,000       1,134,000
                                               --------------- ----------------
                                                  55,881,000      60,176,000
                                               --------------- ----------------
Earnings (loss) before taxes ................     (2,743,000)        284,000

Large corporation tax .......................        308,000         332,000
                                               --------------- ----------------
Net loss ....................................    $(3,051,000)    $   (48,000)
                                               =============== ================

</TABLE>






                 See accompanying notes to financial statements.

                                      F-43
<PAGE>

<TABLE>
<CAPTION>
                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                   STATEMENTS OF CHANGES IN FINANCIAL POSITION

                              (In Canadian Dollars)



                                                    Year Ended October 31
                                               --------------------------------

                                                    1995            1996
                                               -------------- -----------------
<S>                                              <C>             <C>       
Operating Activities:
  Net loss ..................................    $(3,051,000)    $   (48,000)
  Depletion and depreciation ................     13,754,000      14,092,000
  Amortization of deferred financing costs ..        146,000         146,000
  Foreign exchange loss .....................        795,000       1,134,000
  Decrease (increase) in non-cash working         (7,004,000)      2,176,000
    capital items
                                               --------------- ----------------
                                                   4,640,000      17,500,000


Investing Activities:
  Expenditures on capital assets ............    (11,638,000)     (8,722,000)
  Increase in non-cash working capital ....          (54,000)         (2,000)
                                               --------------- ----------------
                                                 (11,692,000)     (8,724,000)

Increase (decrease) in cash and short-term        (7,052,000)      8,776,000
  deposits ..................................

Cash and Short-Term Deposits:
  Beginning of year .......................        8,326,000       1,274,000
                                               --------------- ----------------
  End of year .............................      $ 1,274,000     $10,050,000
                                               =============== ================
</TABLE>



                 See accompanying notes to financial statements.


                                      F-44
<PAGE>


                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                          NOTES TO FINANCIAL STATEMENTS


        The Company was  incorporated on March 9, 1990 under the Canada Business
Corporations Act. The Company was formed to invest in gas plants,  gas gathering
systems  and  related  gas  reserves  in Canada.  Morrison  Petroleums  Ltd.,  a
shareholder, manages the Company.

1.  Summary of Significant Accounting Policies

        The  financial  statements  are prepared in  accordance  with  generally
accepted accounting principles in Canada.

Foreign Currency Translation

        Monetary assets and monetary  liabilities are translated at the exchange
rate in effect at the balance sheet date.  Gains and losses on  translation  are
recorded in the  statement of earnings,  except that gains or losses on monetary
liabilities with a fixed or  ascertainable  life are deferred and amortized over
the repayment period.

Joint Ventures

        The Company's  exploration and production  activities related to oil and
gas  are  substantially  conducted  in  joint  participation  with  others  and,
accordingly,  the accounts reflect only the Company's  proportionate interest in
such activities.

Capital Assets

        The Company  follows the full cost method of accounting for  exploration
and  development  expenditures  wherein all costs related to the exploration for
and the development of oil and gas reserves are capitalized. These costs include
leasehold acquisition costs, carrying charges of non-producing properties, costs
of drilling and completing wells, and oil and gas production equipment. Proceeds
received  from  the  disposal  of  properties  are  normally   credited  against
accumulated  costs  unless  this  would  result in a  significant  change in the
depletion  rate,  in which case, a gain or loss is computed and reflected in the
earnings statement.

        The  Company  carries  its  oil  and  gas  properties  at the  lower  of
capitalized cost and net recoverable  value. Net recoverable value is future net
revenues from proven reserves plus unproven  properties at cost less impairment,
if any, net of the  provision for future site  restoration.  Future net revenues
are determined  using unit prices and production costs in effect at year-end and
include an allowance for future  overhead  costs,  site  restoration,  financing
charges and income taxes that will be incurred in earning these revenues.

        Petroleum  and  natural  gas   properties   are  depleted  and  tangible
production  equipment is depreciated using the  unit-of-production  method based
upon the estimated  proven oil and gas reserves  after  royalties.  Reserves are
converted to common units based on the approximate  equivalent energy content of
each unit of reserves, which results in a conversion ratio of six thousand cubic
feet of gas to one barrel of oil equivalent.

        Processing  facilities are depreciated on a straight-line basis over the
estimated useful life of each facility.

                                      F-45
<PAGE>


                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)






Provision for Future Site Restoration

        Provision is made for future site restoration  costs.  This provision is
charged to earnings over the  estimated  life of the proven oil and gas reserves
and processing  facilities  using the unit of production  and the  straight-line
methods respectively, and is included with depletion and depreciation.

Royalties

        Crown,  freehold and  overriding  royalties and mineral taxes are net of
Alberta Royalty Tax Credits.

Deferred Financing Costs

        The  deferred   financing   costs  are  associated  with  obtaining  the
subscriptions  for units (see Note 2).  These costs were  amortized  evenly over
fifteen years.

2.  Formation and Unit Subscriptions

        Under the Unit Subscription Agreement, the investors have subscribed for
units at U.S.  $100,000 per unit  consisting of U.S.  $75,000 of debentures  and
U.S.  $25,000 of Class A shares (2,500 Class A shares at a price of U.S. $10 per
share)  in  a  3-to-1  ratio.   The  Company   received   commitments  for  unit
subscriptions  totaling U.S.  $114,700,000  (U.S.  $86,025,000 of debentures and
2,867,500  Class A shares at U.S.  $10 per share).  At October 31, 1996 and 1995
98.12% of the subscriptions were paid for and debentures and shares issued.

        On September 14, 1994,  the Board of Directors  approved a resolution to
end any further  acquisitions  by the  investors  and to close out the  investor
obligations.

        At October 31, 1996, U.S. $84,411,829 of debentures and U.S. $28,137,367
Class A shares were issued and outstanding.

        Under Amendment No. 4 to the Unit  Subscription  Agreement dated May 15,
1995,  in 1995  the  Company  is  permitted  to  expend  all of its  funds  from
operations  after debt  servicing and all  applicable  corporate tax, on capital
enhancements,  repairs and maintenance. In 1996 and subsequent years, subject to
approval by eighty  percent of all  shareholders,  the Company is  permitted  to
expend  two-thirds  of its funds from  operations  after debt  servicing and all
applicable corporate tax on capital enhancements, repairs and maintenance.

3.      Future Site Restoration

        A provision for future site  restoration of $1,132,347 (1995 - $779,000)
was expensed during 1996.

                                      F-46
<PAGE>



                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)






4.  Administration

        Pursuant to the administration and management agreements,  the following
expenses have been recorded:

                                            Year Ended October 31
                                      ----------------------------------
                                            1995             1996
                                      ----------------- ----------------

Management fees ............            $ 2,613,000       $2,531,000
Administration fees ...........           1,628,000        1,632,000
                                      ----------------- ----------------
                                          4,241,000        4,163,000

Directors' fees and expenses ..             311,000          113,000
General corporate expenses ....             400,000          299,000
                                      ----------------- ----------------
                                          4,952,000        4,575,000

Recoveries ....................            (445,000)        (458,000)
                                      ----------------- ----------------
                                        $ 4,507,000       $4,117,000
                                      ================= ================

        General  corporate  expenses  include  third-party   professional  fees,
insurance and other items of a general corporate nature.

5.  Income Taxes

        At October 31, 1996, the Company has estimated deductions for income tax
purposes  which  exceed the  related  book value by  $3,400,000,  the  potential
benefit of which has not been  recognized  in these  financial  statements.  For
income tax purposes,  the Company has reported non-capital loss carryforwards of
$50,350,000 at October 31, 1996, which expire as follows: 1997 - $415,000;  1998
- - $1,658,000; 1999 - $12,543,000;  2000 - $11,991,000; 2001 - $9,061,000; 2002 -
$11,247,000; 2003 - $3,435,000.

6.  Related Party Transactions

        At times, the Company enters into agreements and transactions related to
gas plants and gas  reserves  with  Morrison  Petroleums  Ltd.  and Canadian Gas
Gathering Systems II, Inc. These transactions are carried out in accordance with
industry standard terms.

        During  1995,  a  consulting  fee of $158,000  was paid to a founder and
director.

7.  Commitments

        The Company has a Management  Agreement with Morrison Petroleums Ltd. to
provide  services  with  respect to  evaluation,  acquisition,  development  and
construction of projects and Consulting Agreements with two other founders.  The
Agreements  are for ten years and provide for annual  management  and consulting


                                      F-47
<PAGE>

fees to be paid to the three  parties  totaling 1.5% of the original cost of all
projects, subject to certain adjustments as provided in the Agreements.

        The Company has an  Administration  Agreement  with Morrison  Petroleums
Ltd. to provide  administrative  functions to the Company. This Agreement is for
ten  years  and  provides  for an  annual  administration  fee of 5% of the  net
operating income as defined in the agreement.

        Under these agreements, fees were incurred and accrue to the founders as
follows:

                                       Morrison          
                                      Petroleums         Gas        B. Feshbach 
                                         Ltd.        Systems III      & Sons
                                    --------------- -------------- -------------
    Year ended October 31, 1995 ...    $3,485,000      $485,000       $271,000
    Year ended October 31, 1996 ...     3,363,000       513,000        287,000

        In  addition,  under  the  Administration   Agreement,   where  Morrison
Petroleums Ltd. is the operator of a gas system,  capital and operating overhead
is recovered from the Company by Morrison  Petroleums Ltd. following  guidelines
prescribed by the Petroleum Accountants Society of Canada,  Accounting Procedure
at negotiated rates.

8.      Subsequent Events

        Subsequent  to  October  31,  1996 the  Company  became  a wholly  owned
subsidiary of Abraxas Petroleum  Corporation.  Prior to the change in ownership,
the Company sold its interest in the Nevis gas plant and related  facilities for
a consideration of $120,000,000,  converted its U.S. dollar  denominated debt to
Canadian dollars and repaid the debt.

9.      Differences Between Canadian and United States Generally Accepted
Accounting Principles

        These  financial  statements  have  been  prepared  in  accordance  with
Canadian generally accepted  accounting  principles  ("Canadian GAAP") which, in
the  case  of the  Company,  conforms  with  United  States  generally  accepted
accounting principles ("US GAAP") in all material respects except as follows:

        (a)In accordance  with U.S.  GAAP,  exchange gains and losses arising on
           translation of long-term monetary liabilities, unless designated as a
           hedge, are included in income currently instead of being deferred and
           amortized over the lives of such long-term liabilities.

        (b)The Company has applied Statement of Financial  Accounting  Standards
           Number 109  "Accounting  for Income  Taxes"  ("SFAS  109")  effective
           November 1, 1992. SFAS 109 requires the Company to account for income
           taxes using the liability  method for US GAAP purposes.  There was no
           cumulative  effect or effect on current  results as a consequence  of
           adopting SFAS 109.

                                      F-48
<PAGE>


                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)






        The impact of these changes on the Company's financial  statements is as
follows:
<TABLE>
<CAPTION>

Statement of Earnings

                                             Year Ended October 31
                                       ----------------------------------
                                            1995              1996
                                       ----------------  ----------------

<S>                                      <C>               <C>         
Net loss as reported ..............      $(3,051,000)      $   (48,000)
Foreign currency translation ......        1,893,000         1,024,000
                                       ================  ================
Net earnings (loss) in accordance with
  U.S. GAAP .......................      $(1,158,000)      $   976,000
                                       ================  ================

</TABLE>
<TABLE>
<CAPTION>
                                                            Increase
                                         As Reported       (Decrease)        U.S. GAAP
                                       ---------------- ----------------- ----------------


        October 31, 1995
        <S>                               <C>             <C>               <C>                           
        Deferred foreign exchange loss    $7,882,000      $(7,882,000)                 -
        Deficit .......................   (4,394,000)       7,883,000       $(12,277,000)

        October 31, 1996
        Deferred foreign exchange loss     6,858,000       (6,858,000)                 -
        Deficit .......................   (4,442,000)       6,859,000       $(11,301,000)
</TABLE>

10.  Changes in Non-cash Working Capital Components

                                             Year Ended October 31
                                       ----------------------------------
                                            1995              1996
                                       ----------------  ----------------

Decrease (increase) in non-cash
  working capital
Operating:
  Accounts receivable                    $(1,231,000)      $  (690,000)
  Accounts payable                        (5,773,000)        2,866,000
                                       ----------------  ----------------
                                         $(7,004,000)      $ 2,176,000
                                       ================  ================

  Investing:
    Debenture interest payable to       
    shareholders                         $   (54,000)      $    (2,000)
                                       ================  ================  


                                      F-49
<PAGE>



===============================================================================

No person is  authorized  in  connection
with any offer  made  hereby to give any
information     or    to    make     any
representation  not  contained  in  this
Prospectus   in   connection   with  the
offering  made  hereby  and, if given or
made, such information or representation
must not be relied  upon as having  been
authorized   by   the   Issuers.    This
Prospectus  does not constitute an offer
to sell, or a  solicitation  of an offer
to  purchase,   any  securities  in  any
jurisdiction  in which, or to any person
to whom,  it is  unlawful  to make  such
offer  or   solicitation.   Neither  the
delivery  of  this   Prospectus  or  the                 ABRAXAS PETROLEUM
accompanying  Letter of  Transmittal  or                    CORPORATION
both   together   nor  any  exchange  of
securities made hereunder  shall,  under                  CANADIAN ABRAXAS
any circumstances,  create any inference                 PETROLEUM LIMITED
that  there  has not been any  change in
the  affairs  of the  Issuers  since the
date hereof.
 -------------------------


            TABLE OF CONTENTS
                                 Page
Summary..........................  5
Risk Factors..................... 11
Purpose of the Exchange Offer.... 19
Resale of the Exchange Notes..... 20        
Plan of Distribution............. 20                 Offer to Exchange
The Exchange Offer............... 21     11 1/2% Senior Notes Due 2004, Series D
Exchange Agent................... 28            for any and all Outstanding
Use of Proceeds.................. 29     11 1/2% Senior Notes due 2004, Series B
Capitalization................... 29                      and
Selected Consolidated Financial          11 1/2% Senior Notes due 2004, Series C
 Information....................  30
Management's Discussion and
 Analysis of Financial Condition
 and Results of Operations....... 32
Description of Existing
 Indebtedness.................... 37
Business......................... 39
Management....................... 52
Certain Transactions............. 59
Securities Holdings of Principal
 Stockholders, Directors and 
 Officers........................ 60
Description of the Exchange
 Notes........................... 63
Certain United States and
 Canadian Income Tax 
  Considerations................. 91
Book-Entry; Delivery and Form.... 96
Available Information............ 98
Enforceability of Civil
 Liabilities Against Foreign
 Persons......................... 99                    Prospectus
Legal Matters.................... 99
Experts.......................... 99                            , 1998
Glossary of Terms................100
Index to Consolidated Financial
 Statements......................F-1

Until  __________,  1998 (90 days  after
the date of this Prospectus) all dealers
effecting transactions in the registered
securities, whether or not participating
in this distribution, may be required to
deliver   a   Prospectus.   This  is  in
addition to the obligation of dealers to
deliver  a  prospectus  when  acting  as
underwriters  and with  respect to their
unsold allotments or subscriptions.


 <PAGE>
                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS


Item 20.        Indemnification of Directors and Officers

        Abraxas'  Articles of Incorporation  contain a provision that eliminates
the personal  monetary  liability  of directors  and officers to Abraxas and its
stockholders for a breach of fiduciary  duties to the extent  currently  allowed
under the Nevada General  Corporation Law (the "Nevada Statute").  In respect of
Canadian Abraxas,  the Alberta Business Corporation Act ("ABCA") does not permit
any such  limitations  of a  director's  liability.  If a director or officer of
Abraxas  were  to  breach  his  fiduciary   duties,   neither  Abraxas  nor  its
stockholders  could  recover  monetary  damages,  and the only  course of action
available  to Abraxas'  stockholders  would be  equitable  remedies,  such as an
action to enjoin or rescind a transaction  involving a breach of fiduciary duty.
To the extent  certain  claims  against  directors  or  officers  are limited to
equitable  remedies,  this provision of Abraxas'  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 the  stockholders
and the  Company  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 Statute 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.  The  Bylaws  of  Abraxas   provide
indemnification to the same extent allowed pursuant to the foregoing  provisions
of the Nevada Statute.

        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.  CBCA
corporations  are permitted to obtain such insurance also,  accept for liability
relating  to the  failure to act  honestly  and in good faith with a view to the
best  interests of the  corporation.  Abraxas  currently  has a  directors'  and
officers'  liability  insurance  policy  in effect  providing  $3.0  million  in
coverage  and an  additional  $1.0  million in coverage  for certain  employment
related claims.

        Abraxas has entered into indemnity agreements with each of its directors
and  officers.  These  agreements  provide  for  indemnification  to the  extent
permitted by the Nevada Statute.

        Under the  ABCA,  except  in  respect  of an action by or on behalf of a
corporation  or a  body  corporate  to  procure  a  judgment  in  its  favor,  a
corporation may indemnify a director or officer, a former director or officer or
a person who acts or acted at the corporation's request as a director or officer
of a  body  corporate  of  which  the  corporation  is or was a  shareholder  or
creditor,  and his or her  heirs and legal  representatives  (an  "Indemnifiable
Person"),  against all costs, charges and expenses,  including an amount paid to
settle an action or satisfy a  judgment,  reasonably  incurred  by him or her in
respect of any civil,  criminal or administrative  action or proceeding to which
he or she is made a party by  reason  of  being or  having  been a  director  or


                                      II-1
<PAGE>

officer  of such  corporation  or such body  corporate,  if: (a) he or she acted
honestly  and  in  good  faith  with  a  view  to the  best  interests  of  such
corporation;  and (b) in the case of a  criminal  or  administrative  action  or
proceeding  that is enforced  by a monetary  penalty,  he or she had  reasonable
grounds  for  believing  that  his  or  her  conduct  was  lawful.  Further,  an
Indemnifiable Person is entitled to indemnity from the corporation in respect of
all costs,  charges and expenses  reasonably incurred in the defense of any such
civil,  criminal  or  administrative  action  or  proceeding  if he or  she  was
substantially  successful  on the merits in his or her  defense of the action or
proceeding, fulfilled the conditions set out in (a) and (b), above and is fairly
and reasonably entitled to indemnity.  A corporation may, with the approval of a
court,  also indemnify an Indemnifiable  Person in respect of an action by or on
behalf of the  corporation or body corporate to procure a judgment in its favor,
to which  such  person  is made a party by  reason  of  being or  having  been a
director  or an  officer  of the  corporation  or body  corporate,  if he or she
fulfills the  conditions  set out in (a) and (b),  above.  The Canadian  Abraxas
Bylaws  provide for  indemnification  of  directors  and officers to the fullest
extent authorized by the ABCA.

Item 21.        Exhibits and Financial Statement Schedules.

**3.1  Articles  of  Incorporation  of  Abraxas.  (Filed as  Exhibit  3.1 to the
Company's   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 the Company's  Registration  Statement on
Form S-3, No. 333-398 (the "S-3 Registration Statement")).

**3.5 Amended and Restated  Bylaws of Abraxas.  (Filed as Exhibit 3.5 to the S-3
Registration Statement).

**3.6 Articles of Incorporation of Canadian Abraxas (filed as Exhibit 3.7 to the
Issuer's Registration  Statement on Form S-4, No. 33-18673,  the "Exchange Offer
Registration Statement").

**3.7 By-Laws of Canadian  Abraxas  (Filed as Exhibit 3.8 to the Exchange  Offer
Registration Statement).

**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
the Company's Annual Report on Form 10-K filed on March 31, 1995).

**4.3 Rights  Agreement  dated as of December 6, 1994 between  Abraxas and First
Union  National Bank of North  Carolina  ("FUNB").  (Filed as Exhibit 4.1 to the
Company's Registration Statement on Form 8-A filed on December 6, 1994).

**4.4  Amendment  to Rights  Agreement  dated as of July 14, 1997 by and between
Abraxas and American  Stock  Transfer and Trust  Company  (Filed as Exhibit 1 to
Amendment  No. 1 to the  Company's  Registration  Statement on Form 8-A filed on
August 20, 1997).

**4.5  Indenture  dated  November  14, 1996 by and among the  Company,  Canadian
Abraxas and IBJ Schroder  Bank and Trust  Company.  (Filed as Exhibit 4.1 to the
Company's Current Report on Form 8-K dated November 27, 1996).
<PAGE>

**4.6  Indenture  dated  January  27,  1998 by and among the  Company,  Canadian
Abraxas  and IBJ  Schroder  Bank & Trust  Company  (filed as Exhibit  4.1 to the
Company's Current Report on Form 8-K dated February 5, 1998).

**4.7 Form of Series B Note. (Filed as Exhibit 4.7 to the Company's and Canadian
Abraxas' Registration  Statement on Form S-4, No. 333-18673 (the "Exchange Offer
Registration Statement")).

**4.8 Form of Series C Note (Filed as Exhibit A to Exhibit 4.6)

**4.9 Form of Exchange Note (Filed as Exhibit B to Exhibit 4.6)

*4.10 Form of Letter of Transmittal.

**4.11 Specimen Common Stock  Certificate of Canadian  Abraxas (Filed as Exhibit
4.9 to the Exchange Offer Registration Statement)

*5.1 Opinion of Cox & Smith Incorporated.

*5.2 Opinion of Osler, Hoskin & Harcourt.

+**10.1 Abraxas Petroleum  Corporation 1984 Non-Qualified  Stock Option Plan, as
amended and restated.  (Filed as Exhibit 10.7 to the Company's  Annual Report on
Form 10-K filed April 14, 1993).

+**10.2  Abraxas  Petroleum  Corporation  1984  Incentive  Stock Option Plan, as
amended and restated.  (Filed as Exhibit 10.8 to the Company's  Annual Report on
Form 10-K filed April 14, 1993).

+**10.3 Abraxas  Petroleum  Corporation 1993 Key Contributor  Stock Option Plan.
(Filed as Exhibit 10.9 to the  Company's  Annual Report on Form 10-K filed April
14, 1993

+**10.4  Abraxas  Petroleum  Corporation  401(k) Profit Sharing Plan.  (Filed as
Exhibit 10.4 to the Exchange Offer Registration Statement).

+**10.5  Abraxas  Petroleum  Corporation  Director Stock Option Plan.  (Filed as
Exhibit 10.5 to the Exchange Offer Registration Statement).

+**10.6  Abraxas  Petroleum  Corporation  Restricted  Share Plan for  Directors.
(Filed as Exhibit  10.20 to the  Company's  Annual  Report on Form 10-K filed on
April 12, 1994).

+**10.7 Abraxas  Petroleum  Corporation 1994 Long Term Incentive Plan. (Filed as
Exhibit  10.21 to the  Company's  Annual  Report on Form 10-K filed on April 12,
1994).

+**10.8 Abraxas Petroleum  Corporation  Incentive Performance Bonus Plan. (Filed
as Exhibit 10.24 to the Company's  Annual Report on Form 10-K filed on April 12,
1994).

**10.9 Registration  Rights and Stock Registration  Agreement dated as of August
11, 1993 by and among  Abraxas,  EEP and Endowment  Energy  Partners II, Limited
Partnership  ("EEP II").  (Filed as Exhibit 10.33 to the Company's  Registration
Statement  on  Form  S-1,  Registration  No.  33-66446  (the  "S-1  Registration
Statement")).

**10.10 First Amendment to Registration Rights and Stock Registration  Agreement
dated June 30, 1994 by and among Abraxas, EEP and EEP II. (Filed as Exhibit 10.3
to the Registrant's Current Report on Form 8-K filed on July 14, 1994).
<PAGE>

**10.11 Second Amendment to Registration Rights and Stock Registration Agreement
dated September 2, 1994 by and among Abraxas,  EEP and EEP II. (Filed as Exhibit
10.3 to the Company's Annual Report on Form 10-K filed March 31, 1995)

**10.12 Third Amendment to Registration Rights and Stock Registration  Agreement
dated November 17, 1995 by and among Abraxas,  EEP and EEP II. (Filed as Exhibit
10.17 to the Company's Annual Report on Form 10-K filed March 31, 1995)

**10.13  Common  Stock  Purchase  Warrant  dated as of December 18, 1991 between
Abraxas and EEP. (Filed as Exhibit 12.3 to the Company's  Current Report on Form
8-K filed January 9, 1992).

**10.14 Common Stock Purchase Warrant dated as of August 1, 1993 between Abraxas
and EEP. (Filed as Exhibit 10.35 to the S-1 Registration Statement).

**10.15 Common Stock Purchase  Warrant dated August 11, 1993 between Abraxas and
EEP II. (Filed as Exhibit 10.36 to the S-1 Registration Statement).

**10.16 Common Stock Purchase  Warrant dated August 11, 1993 between Abraxas and
Associated Energy Managers, Inc. (Filed as Exhibit 10.37 to the S-1 Registration
Statement).

**10.17 Letter dated September 2, 1994 from Abraxas to EEP and EEP II. (Filed as
Exhibit 10.13 to the Company's Annual Report on Form 10-K filed March 31, 1995)

**10.18  Amended and  Restated  Credit  Agreement  dated as of November 14, 1996
among Abraxas,  Bankers Trust Company,  Inc. (U.S.) Capital  Corporation and the
Lenders named therein. (Filed as Exhibit 10.5 to the Company's Current Report on
Form 8-K filed November 27, 1996).

**10.19  Warrant  Agreement  dated as of July 27, 1994 between Abraxas and FUNB.
(Filed as Exhibit 10.3 to the Company's  Current Report on Form 8-K filed August
5, 1994).

**10.20  Warrant  Agreement  dated as of December 16, 1994,  between Abraxas and
FUNB.  (Filed as Exhibit 10.23 to the Company's Annual Report on Form 10-K filed
March 31, 1995).

**10.21 First Amendment to Warrant Agreement dated as of August 31, 1995 between
Abraxas and FUNB. (Filed as Exhibit 10.21 to the S-3 Registration Statement).

**10.22 Form of Indemnity  Agreement  between  Abraxas and each of its directors
and officers. (Filed as Exhibit 10.30 to the S-1 Registration Statement).

+*10.23 Employment Agreement between Abraxas and Robert L. G. Watson.

+*10.24 Employment Agreement between Abraxas and Chris E. Williford.

+*10.25 Employment Agreement between Abraxas and Robert Patterson.

+*10.26 Employment Agreement between Abraxas and Stephen T. Wendel.

+*10.27 Employment Agreement between Abraxas and Lowell Lischer.

+*10.28 Employment Agreement between Abraxas and Jack M. Roney.

**10.29  Management  Agreement  dated November 14, 1996 by and between  Canadian
Abraxas and Cascade Oil & Gas Ltd. (Filed as Exhibit 10.36 to the Exchange Offer
Registration Statement).
<PAGE>

**10.30 First  Amendment to Amended and Restated  Credit  Agreement  dated as of
October  14,  1997 by and  among  Bankers  Trust  Company,  ING  (U.S.)  Capital
Corporation  and the  Lenders  named  therein  (Filed  as  Exhibit  10.29 to the
Company's Registration Statement on Form S-4, No. 333-43949).

**10.31  Amendment No. 2 to Amended and Restated Credit  Agreement dated January
27,  1998 by and among  Abraxas,  Bankers  Trust  Company,  ING  (U.S.)  Capital
Corporation  and  the  Lenders  named  therein  (filed  as  Exhibit  10.3 to the
Company's Current Report on Form 8-K dated February 5, 1998).

**10.32  Registration  Rights  Agreement  dated  January  27,  1998 by and among
Abraxas,  Canadian  Abraxas and Jefferson & Co., Inc.  (Filed as Exhibit 10.2 to
the Company's Current Report on Form 8-K dated February 5, 1998).

*12.1   Statement Regarding Computation of Earnings to Fixed Charges

**21.1  Subsidiaries  of  Abraxas.  (Filed  as  Exhibit  21.1  to the  Company's
Registration Statement on Form S-4, No. 333-43949).

*23.1 Consent of Ernst & Young LLP.

*23.2 Consent of DeGolyer & MacNaughton.

*23.3 Consent of McDaniel & Associates Consultants, Ltd.

*23.4 Consent of Cox & Smith Incorporated (included in Exhibit 5.1).

*23.5 Consent of KPMG.

*23.6 Consent of Osler, Hoskin & Harcourt (included in Exhibit 5.2).

*24.1 Power of Attorney of Franklin Burke.

*24.2 Power of Attorney of Harold D. Carter.

*24.3 Power of Attorney of Robert D. Gershen.

*24.4 Power of Attorney of Richard M. Kleberg, III.

*24.5 Power of Attorney of James C. Phelps.

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

*24.7 Power of Attorney of Richard M. Riggs

*24.8 Power of Attorney of Donald A. Engle

*24.9 Power of Attorney of Roger L. Bruton

*25.1 Form T-1 Statement of Eligibility and Qualification of IBJ Schroder Bank &
Trust Company, as Trustee.

*27.1 Financial Data Schedule.

*     Filed herewith.
**    Incorporated by reference to the filing indicated.
+     Management Compensatory Plan or Agreement.


<PAGE>


Item 22.        Undertakings

        A. Each of the undersigned  registrants  hereby undertakes to respond to
requests for  information  that is incorporated by reference into the prospectus
pursuant to Items 4, 10(b),  11, or 13 of this Form,  within one business day of
receipt of such request,  and to send the incorporated  documents by first class
mail or other equally  prompt  means.  This  includes  information  contained in
documents filed subsequent to the effective date of the  Registration  Statement
through the date of responding to the request.

        B. Each of the  undersigned  registrants  hereby  undertakes  that,  for
purposes of determining  any liability  under the  Securities Act of 1933,  each
filing of the  registrant's  annual report  pursuant to Section 13(a) or 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.

        C.  Insofar  as  indemnification   for  liabilities  arising  under  the
Securities Act of 1933 may be permitted to directors,  officers and  controlling
persons of each of the  registrants  pursuant to the  foregoing  provisions,  or
otherwise,  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 in the successful defense of any action, suit or proceedings)
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
either of them is  against  public  policy as  expressed  in the Act and will be
governed by the final adjudication of such issue.

        D. Each of the undersigned  registrants  hereby  undertakes to supply by
means of a  post-effective  amendment all information  concerning a transaction,
and the company being acquired involved therein, that was not the subject of and
included in the Registration Statement when it became effective.



<PAGE>


                                   SIGNATURES

        Pursuant to the  requirements  of the  Securities  Act, the  undersigned
registrant  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 9, 1998.



                                 ABRAXAS PETROLEUM CORPORATION

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



<PAGE>


        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     Chairman of the Board,                April 9, 1998
- --------------------------  President, Chief Executive Officer
Robert L.G. Watson          (Principal Executive Officer) and 
                            Director of the Company

/s/ Chris E. Williford      Executive Vice President,             April 9, 1998
- --------------------------  Treasurer, Chief Financial
Chris E. Williford          Officer and Director (Principal
                            Financial and Accounting Officer)
                            of the Company

 *                          Director of the Company               April 9, 1998
- ---------------------------
Franklin Burke

*                           Director of the Company               April 9, 1998
- ---------------------------
Harold D. Carter

*                           Director of the Company               April 9, 1998
- ---------------------------
Robert D. Gershen

*                           Director of the Company               April 9, 1998
- ---------------------------
Richard M. Kleberg, III

 *                          Director of the Company               April 9, 1998
- ---------------------------
James C. Phelps

 *                          Director of the Company               April 9, 1998
- ---------------------------
Paul A. Powell, Jr.

*                           Director of the Company               April 9, 1998
- ---------------------------
Richard M. Riggs

By: /s/ Chris E. Williford
Chris E. Williford
Attorney-in-fact


                                      II-8
<PAGE>

<PAGE>


                                   SIGNATURES

        Pursuant to the  requirements  of the  Securities  Act, the  undersigned
registrant  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 9, 1998.



                                     CANADIAN ABRAXAS PETROLEUM LIMITED



                                     By:    /s/ Robert L. G. Watson
                                        __________________________________
                                            Robert L. G. Watson, President


                                      II-9
<PAGE>


        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             Chairman of the Board,         April 9, 1998
- -----------------------------       President, and Director of
Robert L.G. Watson                  Canadian Abraxas
                                    (Principal Executive Officer)

/s/Chris E. Williford               Vice President and Assistant   April 9, 1998
- -----------------------------       Secretary of Canadian Abraxas
Chris E. Williford                  (Principal Accounting Officer)

*                                   Secretary and Director of      April 9, 1998
- -----------------------------       Canadian Abraxas
Donald A. Engle                             

*----------------------------       Executive Vice President       April 9, 1998
Roger L. Bruton                     and Director of Canadian Abraxas


By:/s/ Chris E. Williford_________
Chris E. Williford
Attorney-in-fact



<PAGE>


                                                                         
                                  EXHIBIT INDEX

Exhibit Number:     Exhibit                                        Page Number

4.10                Form of Letter of Transmittal.                      __

5.1                 Opinion of Cox & Smith Incorporated

5.2                 Opinion of Osler, Hoskin & Harcourt

10.23               Employment Agreement between Abraxas and
                    Robert L.G. Watson

10.24               Employment Agreement between Abraxas and
                    Chris E. Williford

10.25               Employment Agreement between Abraxas and
                    Robert Patterson

10.26               Employment Agreement between Abraxas and
                    Stephen T. Wendel

10.27               Employment Agreement between Abraxas and
                    Lowell Lischer

10.28               Employment Agreement between Abraxas and
                    Jack M. Roney

12.1                Statement Regarding Computation of Earnings
                    to Fixed Charges  

23.1                Consent of Ernst & Young LLP.                            

23.2                Consent of DeGoyler & MacNaughton

23.3                Consnet of McDaniel & Associates Consultants Ltd.

23.4                Consent of Cox & Smith Incorporated (included
                    in Exhibit 5.1)

23.5                Consent of KPMG

23.6                Consent of Osler, Hoskin & Harcourt (included
                    in Exhibit 5.2)

24.1                Power of Attorney of Franklin Burke

24.2                Power of Attorney of Harold D. Carter

24.3                Power of Attorney of Robert D. Gershen

24.4                Power of Attorney of Richard M. Kleberg, III

24.5                Power of Attorney of James C. Phelps

24.6                Power of Attorney of Paul A. Powell, Jr.

24.7                Power of Attorney of Richard M. Riggs

                                       1
<PAGE>



24.8                Power of Attorney of Donald A. Engle

24.9                Power of Attorney of Roger L. Bruton

25.1                Form T-1 Statement of Eligibility and Qualification of
                    IBJ Schroder Bank & Trust Company, as Trustee

27.1                Financial Data Schedule


                                       2
<PAGE>
                                                                  EXHIBIT 4.10


                  THE EXCHANGE OFFER WILL EXPIRE AT 5:00 P.M.,
            NEW YORK CITY TIME, ON__________ , 1998 UNLESS EXTENDED.



                          FORM OF LETTER OF TRANSMITTAL


                   TO ACCOMPANY 11 1/2% SENIOR NOTES DUE 2004,
                        SERIES B (CUSIP NO. ____________)

                   AND 11 1/2% SENIOR NOTE DUE 2004, SERIES C
                           (CUSIP NO. ______________)

                                       OF

                          ABRAXAS PETROLEUM CORPORATION
                             (a Nevada corporation)
                                       AND
                       CANADIAN ABRAXAS PETROLEUM LIMITED
                             (a Canada corporation)

                       TENDERED PURSUANT TO THE PROSPECTUS
                            DATED ____________, 1997


                                       3
<PAGE>


(PLEASE READ THE INSTRUCTIONS CAREFULLY)

IMPORTANT:  THIS LETTER OF  TRANSMITTAL  (OR A  FACSIMILE  HEREOF) AND ALL OTHER
DOCUMENTS  AND  INSTRUMENTS  REQUIRED  HEREBY SHOULD BE SENT OR DELIVERED TO THE
EXCHANGE  AGENT AT THE ADDRESS SET FORTH BELOW.  TENDERS MUST BE RECEIVED BY THE
EXCHANGE  AGENT PRIOR TO 5:00 P.M.,  NEW YORK CITY TIME,  ON , 1998,  UNLESS THE
EXCHANGE OFFER IS EXTENDED (THE "EXPIRATION DATE").

                               The Exchange Agent

                        IBJ SCHRODER BANK & TRUST COMPANY

Facsimile Transmission Telephone Number:       Address for Mailing:
        (212) 858-2611                               One State Street
                                                     New York, N.Y.  10004
                                               Attn: Reorganization Operations
                                                     Department

Confirm by Telephone:                          Address for Couriers and
                                               Hand Deliveries:
        (212) 858-2103                               One State Street
                                                     New York, N.Y.  10004
                                               Attn: Securities Processing
                                                     Window,
                                                     Subcellar One (SC-1)


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

DELIVERY TO ANY ADDRESS OTHER THAN AS SET FORTH HEREIN WILL NOT CONSTITUTE VALID
DELIVERY.

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

THE  INSTRUCTIONS  ACCOMPANYING  THIS  LETTER  OF  TRANSMITTAL  SHOULD  BE  READ
CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL IS COMPLETED.

        This Letter of  Transmittal  is to be  completed  by holders of Series B
Notes  and  Series C Notes  (as  defined  below)  only (a) if Series B Notes and
Series C Notes are to be forwarded  herewith or (b) if delivery of such Series B
Notes and Series C Notes is to be made by  book-entry  transfer  to the  account
maintained by the Exchange Agent at The Depository  Trust Company (DTC) pursuant
to the  procedures  set forth under the caption  "The  Exchange  Offer -- How to
Tender" in the Prospectus (as defined below).  DELIVERY OF DOCUMENTS TO DTC DOES
NOT CONSTITUTE DELIVERY TO THE EXCHANGE AGENT.

Holders of Series B Notes and Series C Notes who cannot  deliver  their Series B
Notes or Series CNotes or deliver  confirmation  of the  book-entry  transfer of
their Series B Notes and Series C Notes into the Exchange Agent's account at DTC
and all other documents required hereby to the Exchange Agent on or prior to the
Expiration  Date must tender their Series B Notes and Series C Notes pursuant to
the  guaranteed  delivery  procedure  set forth under the caption "The  Exchange
Offer -- How to Tender" in the Prospectus. See Instruction 2 herein.

                                       4
<PAGE>


            (BOXES BELOW TO BE CHECKED BY ELIGIBLE INSTITUTIONS ONLY)

/  /    CHECK HERE IF TENDERED  SERIES B OR SERIES C NOTES ARE BEING DELIVERED
        BY BOOK-ENTRY  TRANSFER  MADE TO THE ACCOUNT  MAINTAINED BY THE EXCHANGE
        AGENT WITH DTC AND COMPLETE THE FOLLOWING:

Name of Tendering Institution_________________________________________________
DTC Account Number ___________________________________________________________
Transaction Code Number ______________________________________________________

/  /    CHECK  HERE AND  ENCLOSE  A  PHOTOCOPY  OF THE  NOTICE  OF  GUARANTEED
        DELIVERY  IF  TENDERED  SERIES B OR SERIES C NOTES  ARE BEING  DELIVERED
        PURSUANT  TO A NOTICE  OF  GUARANTEED  DELIVERY  PREVIOUSLY  SENT TO THE
        EXCHANGE AGENT AND COMPLETE THE FOLLOWING:

Name of Registered Owner(s) __________________________________________________
Date of Execution of Notice of Guaranteed Delivery ___________________________
Name of Institution which Guaranteed delivery ________________________________

If Delivered By Book-Entry Transfer:

Name of Tendering Institution ________________________________________________
DTC Account Number ___________________________________________________________
Transaction Code Number ______________________________________________________

/  /    CHECK HERE IF  TENDERING  BY  BOOK-ENTRY  TRANSFER  AND  NON-EXCHANGED
        SERIES B OR  SERIES C NOTES  ARE TO BE  RETURNED  BY  CREDITING  THE DTC
        ACCOUNT NUMBER SET FORTH ABOVE.



                                       5
<PAGE>


               DESCRIPTION OF SERIES B OR SERIES C NOTES TENDERED

SERIES B OR SERIES C NOTES TENDERED_________________________________________

IF BLANK, PRINT NAME AND ADDRESS OF REGISTERED HOLDER.
- ----------------------------------------------------------------------------

(ATTACH ADDITIONAL LIST IF NECESSARY)
- --------------------------------------------------------------------------------
                                    AGGREGATE PRINCIPAL    PRINCIPAL AMOUNT OF
            SERIES B OR SERIES C   AMOUNT OF SERIES B OR   SERIES B OR SERIES C
              NOTES NUMBER(S)*        SERIES C NOTES         NOTES TENDERED**
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
- ---------- ---------------------- ------------------------ ---------------------
TOTALS:
- ---------- ---------------------- ------------------------ ---------------------

* Need not be completed by Book-Entry Holders.
** The aggregate  principal  amount of all Series B Notes or Series C Notes held
shall be deemed tendered unless a lesser  principal  amount is specified in this
column. See Instruction 4.


                                       6
<PAGE>


                     NOTE: SIGNATURES MUST BE PROVIDED BELOW
               PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY

Ladies and Gentlemen:

        Pursuant  to the terms and  subject to the  conditions  of the  Exchange
Offer  (as  described  below)  of  Abraxas  Petroleum   Corporation,   a  Nevada
corporation  ("Abraxas"),  and  Canadian  Abraxas  Petroleum  Limited,  a Canada
corporation  ("Canadian Abraxas" and, together with Abraxas, the "Issuers"),  to
holders of the Issuers' 11 1/2% Senior  Notes due 2004,  Series B (the "Series B
Notes") and 11 1/2% Senior Notes due 2004,  Series C (the "Series C Notes"),  as
set forth in the Prospectus dated ___________,  1998 (the "Prospectus") and this
Letter of  Transmittal  (which,  together with the  Prospectus,  constitute  the
Exchange Offer),  the signer of this Letter of Transmittal (the "Holder") hereby
accepts the Exchange Offer and tenders the Series B Notes and the Series C Notes
listed on this Letter of Transmittal in exchange for a like principal  amount of
11 1/2% Senior Notes due 2004,  Series D (the  "Exchange  Notes").  The Exchange
Notes are  substantially  identical to the Series B Notes and the Series C Notes
except  that  the  resale  of the  Exchange  Notes  will not be  subject  to the
restrictions  of Rule 144A under the  Securities  Act of 1933,  as amended  (the
"Securities  Act"),  and the  Exchange  Notes  will not be  subject  to  certain
interest rate increase provisions which were applicable to the Series C Notes in
certain circumstances relating to the timing of the Exchange Offer. The Exchange
Notes  evidence  the same debt as the Series B Notes and  Series C Notes  (which
they  replace).  The  Holder  hereby  acknowledges  receipt  of the  Prospectus.
Capitalized terms used but not defined herein have the respective meanings given
such terms in the Prospectus.

        Accordingly,  subject to, and effective upon, acceptance for exchange of
the Series B Notes and the Series C Notes tendered  herewith in accordance  with
the terms and conditions of the Exchange Offer, the Holder hereby sells, assigns
and transfers to the Issuers all right,  title and interest in and to all of the
Series B Notes and the  Series C Notes  that are  being  tendered  for  exchange
hereby, and hereby  irrevocably  constitutes and appoints the Exchange Agent the
true and lawful  agent and  attorney-in-fact  of the Holder with respect to such
securities, with full power of substitution (such power of attorney being deemed
to be an  irrevocable  power coupled with an interest),  to (i) deliver Series B
Notes  and  Series  C  Notes  tendered  hereby  or  transfer  ownership  of such
securities on the account books maintained by DTC together, in either such case,
with the accompanying  evidences of transfer and authority,  to the Issuers upon
the receipt by the Exchange Agent,  as the Holder's agent, of the  consideration
therefor  pursuant to the  Exchange  Offer,  and (ii)  receive all  benefits and
otherwise exercise all rights of beneficial ownership of such Series B Notes and
Series C Notes.

        THE HOLDER HEREBY REPRESENTS AND WARRANTS THAT THE HOLDER HAS FULL POWER
AND AUTHORITY TO TENDER,  EXCHANGE, SELL, ASSIGN AND TRANSFER THE SERIES B NOTES
AND SERIES C NOTES  TENDERED  HEREBY AND TO ACQUIRE THE EXCHANGE  NOTES ISSUABLE
UPON THE EXCHANGE OF SUCH TENDERED SECURITIES, THAT THE EXCHANGE AGENT, AS AGENT
OF THE ISSUERS, WILL ACQUIRE GOOD AND UNENCUMBERED TITLE TO SUCH TENDERED SERIES
B NOTES AND SERIES C NOTES, FREE AND CLEAR OF ALL LIENS,  RESTRICTIONS,  CHARGES
AND ENCUMBRANCES,  AND THE SERIES B NOTES AND SERIES C NOTES TENDERED HEREBY ARE
NOT SUBJECT TO ANY ADVERSE  CLAIM OR  ENCUMBRANCE  WHEN THE SAME ARE ACCEPTED BY
THE ISSUERS.  THE HOLDER WILL, UPON REQUEST,  EXECUTE AND DELIVER ANY ADDITIONAL
DOCUMENTS  DEEMED  BY THE  ISSUERS  OR THE  EXCHANGE  AGENT TO BE  NECESSARY  OR
DESIRABLE TO COMPLETE THE EXCHANGE,  SALE, ASSIGNMENT AND TRANSFER OF THE SERIES
B NOTES AND SERIES C NOTES TENDERED HEREBY.

        All authority  herein conferred or agreed to be conferred in this Letter
of  Transmittal  shall survive the death or  incapacity  of the Holder,  and any
obligation  of the Holder  hereunder  shall be binding upon the heirs,  personal
representatives,  successors and assigns of the Holder.  Except as stated in the
Prospectus, this tender is irrevocable.

                                       7
<PAGE>

        A tender of Series B Notes and Series C Notes pursuant to the procedures
described in the Prospectus and in the  instructions  hereto will constitute the
Holder's  acceptance  of the terms and  conditions  of the Exchange  Offer and a
binding  agreement  between the tendering  Holder of Series B Notes and Series C
Notes and the  Issuers  upon the  terms and  subject  to the  conditions  of the
Exchange Offer.  The Holder  recognizes that,  under certain  circumstances  set
forth in the  Prospectus,  the  Issuers may not be required to accept any of the
Series B Notes and the Series C Notes tendered for exchange  hereby.  The Holder
hereby  directs that the  Exchange  Notes and/or any Series B Notes and Series C
Notes  representing  any principal  amount of such  securities  not exchanged be
issued in the name of the Holder. The Holder understands that Holders who tender
Series B Notes and Series C Notes by book-entry transfer ("Book-Entry  Holders")
will receive their Exchange Notes and any principal amount of Series B Notes and
Series C Notes not  exchanged  will be  returned  to such  Book-Entry  Holder by
crediting in the name of such Book-Entry  Holder the account  maintained by DTC.
The Holder recognizes that the Issuers have no obligation to transfer any Series
B Notes and Series C Notes from the name(s) of the registered holder(s) thereof.

        BY TENDERING SERIES B NOTES AND SERIES C NOTES AND EXECUTING THIS LETTER
OF  TRANSMITTAL,  THE  HOLDER IS DEEMED  TO  REPRESENT  AND  AGREE,  AND  HEREBY
REPRESENTS  AND AGREES,  THAT (I) IT IS ACQUIRING THE EXCHANGE NOTES ISSUABLE IN
EXCHANGE  THEREFOR IN THE ORDINARY  COURSE OF ITS BUSINESS,  (II) UNLESS IT IS A
BROKER-DEALER  REFERRED TO IN THE NEXT SENTENCE, IT IS NOT ENGAGING AND DOES NOT
INTEND TO ENGAGE IN THE DISTRIBUTION OF THE EXCHANGE NOTES, (III) AT THE TIME OF
CONSUMMATION  OF THE  EXCHANGE  OFFER THE  HOLDER  WILL HAVE NO  ARRANGEMENT  OR
UNDERSTANDING WITH ANY PERSON TO PARTICIPATE IN THE DISTRIBUTION OF THE EXCHANGE
NOTES IN VIOLATION OF THE PROVISIONS OF THE  SECURITIES  ACT, (IV) THE HOLDER IS
NOT AN AFFILIATE OF ANY OF THE ISSUERS  WITHIN THE MEANING OF RULE 405 UNDER THE
SECURITIES ACT AND (V) IF IT  PARTICIPATES IN THE EXCHANGE OFFER FOR THE PURPOSE
OF  DISTRIBUTING  THE EXCHANGE  NOTES IT MUST COMPLY WITH THE  REGISTRATION  AND
PROSPECTUS  DELIVERY  REQUIREMENTS  OF THE SECURITIES ACT IN CONNECTION WITH ANY
RESALE OF THE EXCHANGE NOTES.  EACH HOLDER WHO IS A PARTICIPATING  BROKER-DEALER
(AS  DEFINED  IN THE  PROSPECTUS)  HOLDING  SERIES  B NOTES  AND  SERIES C NOTES
ACQUIRED  FOR ITS OWN  ACCOUNT  AS A RESULT OF  MARKET-MAKING  OR OTHER  TRADING
ACTIVITIES THAT WILL RECEIVE  EXCHANGE NOTES IN EXCHANGE FOR SUCH SERIES B NOTES
AND SERIES C NOTES PURSUANT TO THE EXCHANGE OFFER FURTHER  REPRESENTS AND AGREES
THAT IT WILL DELIVER A PROSPECTUS  (WHICH MAY BE THE  PROSPECTUS)  IN CONNECTION
WITH ANY  RESALE OF SUCH  EXCHANGE  NOTES  DURING  THE  PERIOD  REQUIRED  BY THE
SECURITIES  ACT.  BY  ACKNOWLEDGING  THAT IT WILL  DELIVER AND BY  DELIVERING  A
PROSPECTUS, A PARTICIPATING BROKER-DEALER WILL NOT BE DEEMED TO ADMIT THAT IT IS
AN "UNDERWRITER" WITHIN THE MEANING OF THE SECURITIES ACT.

                                       8
<PAGE>


HOLDER SIGN HERE

X______________________________________________________________

X______________________________________________________________
                   (Signature(s) of Owner(s))

Dated_________________________________________________   , 1998

Holder's Telephone Number


(Must be signed by the  registered  holder(s)  exactly as name(s)  appear(s)  on
Series B Notes or Series C Notes.  If  signature  is by an  attorney,  executor,
administrator,  trustee,  guardian  or others  acting in a  fiduciary  capacity,
please set forth full title and see Instruction 5.)

Signature(s)
Guaranteed
(See Instruction 1)

- -------------------------------------------------------------------------------
(Firm -- Please Print)

- -------------------------------------------------------------------------------
(Authorized Signature)

- -------------------------------------------------------------------------------
(Date)

                          SPECIAL DELIVERY INSTRUCTIONS
                        (See Instructions 1, 4, 5 and 6)

        To be completed ONLY by registered holders and ONLY if Exchange Notes or
Series B Notes or  Series C Notes  representing  any  principal  amount  of such
securities  not  exchanged are to be sent to the Holder at an address other than
that shown above.

Mail Exchange Notes (or Series B Notes or Series C Notes) to:

(Name -- Please Print) _______________________________________________________

(Address) (Include Zip Code)__________________________________________________
- ------------------------------------------------------------------------------
FOR PARTICIPATING BROKER-DEALERS ONLY
(See Instruction 11)

Please  send______________  copies  of the  Prospectus  and any  supplements or
amendments thereto to the following address:

_______________________________________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________

                                       9
<PAGE>

                                  INSTRUCTIONS

FORMING PART OF THE TERMS AND CONDITIONS OF THE EXCHANGE OFFER

1.      GUARANTEE OF SIGNATURES.  Signatures on Letters of Transmittal  need not
        be guaranteed,  except as provided in this Instruction 1. In cases where
        Series  B Notes  or  Series  C Notes  are  tendered  for  exchange  by a
        registered  holder of Series B Notes or Series C Notes who has completed
        the box  entitled  "Special  Delivery  Instructions"  on the  Letter  of
        Transmittal,   signatures  on  Letters  of  Transmittal  (or  facsimiles
        thereof) must be guaranteed by a commercial bank or trust company having
        an office or  correspondent  in the  United  States or a firm which is a
        member of a registered  national  securities exchange or a member of the
        National   Association  of  Securities   Dealers,   Inc.  (an  "Eligible
        Institution").

2.      DELIVERY  OF  LETTER  OF  TRANSMITTAL  AND  CERTIFICATES.  In  order  to
        participate in the Exchange Offer and receive  Exchange  Notes, a holder
        must properly  complete and duly execute (with signatures  guaranteed if
        required by  Instruction  1) the Letter of  Transmittal  (or a facsimile
        thereof)  and mail or deliver it,  together  with the Series B Notes and
        the Series C Notes to be tendered for  exchange  (or the Exchange  Agent
        must  receive a timely  confirmation  of a  book-entry  transfer of such
        Series B Notes and Series C Notes into the Exchange  Agent's  account at
        DTC as described in the Prospectus) and any other required documents, to
        the  Exchange  Agent.  The  Exchange  Agent must  receive the  foregoing
        documents and instruments on or prior to the Expiration  Date.  DELIVERY
        OF DOCUMENTS TO DTC DOES NOT CONSTITUTE DELIVERY TO THE EXCHANGE AGENT.

        If a holder  desires to tender Series B Notes or Series C Notes pursuant
        to the Exchange Offer and such holder's Series B Notes or Series C Notes
        are  not  immediately  available,  or if the  procedure  for  book-entry
        transfer  cannot be completed on a timely  basis,  or such holder cannot
        deliver  the  Series B Notes or Series C Notes  and all  other  required
        documents  to the  Exchange  Agent prior to the  Expiration  Date,  such
        Series  B  Notes  and  Series  C  Notes  may be  tendered  if all of the
        following  guaranteed  delivery  procedures  are complied with: (i) such
        tenders are made by or through an Eligible Institution;  (ii) a properly
        completed  and  duly  executed   Notice  of  Guaranteed   Delivery,   in
        substantially  the form  provided  by the  Issuers,  is  received by the
        Exchange Agent on or prior to the Expiration  Date; and (iii) the Series
        B Notes  and the  Series C  Notes,  in  proper  form  for  transfer  (or
        confirmation of book-entry  transfer of such Series B Notes and Series C
        Notes  into the  Exchange  Agent's  account at DTC as  described  in the
        Prospectus), together with a properly completed and duly executed Letter
        of  Transmittal  and all  other  documents  required  by this  Letter of
        Transmittal,  are received by the  Exchange  Agent within three New York
        Stock  Exchange,  Inc.  trading days after the date of execution of such
        Notice of Guaranteed  Delivery,  all as provided  under the caption "The
        Exchange Offer -- How to Tender" in the Prospectus.

        All questions as to the validity,  form,  eligibility (including time of
        receipt) and acceptability of Series B Notes and Series C Notes tendered
        will be  determined  by the Issuers in their sole  discretion,  and such
        determinations will be final and binding.  The Issuers reserve the right
        to reject any and all  tenders  determined  by their not to be in proper
        form or otherwise not valid or the acceptance for exchange of which may,
        in the  opinion of the  Issuers'  counsel,  be  unlawful or to waive any
        irregularities or conditions.  The Issuers'  interpretation of the terms
        and  conditions  of  the  Exchange   Offer   (including  the  Letter  of
        Transmittal  and  Instructions  thereto) will also be final and binding.
        The  Issuers  and the  Exchange  Agent  are not  under  any duty to give
        notification  of any  irregularities  or defects and shall not incur any
        liability for failure to give any such notification. Tenders will not be
        deemed to have been made until such  irregularities or defects have been
        cured or waived.  Any tender  (including the Letter of  Transmittal  and
        Series B Notes and Series C Notes) that is not  properly  completed  and
        executed,  and as to which  irregularities  or defects  are not cured or
        waived,  will be returned by the Exchange Agent to the tendering  holder
        promptly after the Expiration Date without cost to the tendering  holder


                                       10
<PAGE>

        (or,  in the case of  Series B Notes  and  Series C Notes  delivered  by
        book-entry transfer within DTC, the tendered Series B Notes and Series C
        Notes  will be  credited  to the  account  maintained  within DTC by the
        participant).

        THE METHOD OF DELIVERY OF THIS LETTER OF TRANSMITTAL, THE SERIES B NOTES
        AND SERIES C NOTES AND ALL OTHER REQUIRED DOCUMENTS,  INCLUDING DELIVERY
        THROUGH DTC, IS AT THE ELECTION  AND RISK OF THE  TENDERING  HOLDER AND,
        EXCEPT AS OTHERWISE PROVIDED IN THIS INSTRUCTION 2, THE DELIVERY WILL BE
        DEEMED  MADE ONLY WHEN  ACTUALLY  RECEIVED  BY THE  EXCHANGE  AGENT.  IF
        DELIVERY IS BY MAIL,  REGISTERED  MAIL,  WITH RETURN RECEIPT  REQUESTED,
        PROPERLY INSURED, IS RECOMMENDED.

        No alternative,  conditional or contingent tenders will be accepted. All
        tendering  holders,  by  execution  of this  Letter  of  Transmittal  or
        facsimile  hereof,  waive  any  rights  to  receive  any  notice  of the
        acceptance of their tender.

3.      INADEQUATE SPACE. If the space provided herein is inadequate, the Series
        B and Series C Note numbers and the  principal  amount of Series B Notes
        and  Series C Notes  should  be  listed on a  separate  signed  schedule
        attached hereto.

4.      PARTIAL TENDERS. If less than all of the principal amount represented by
        any  Series B Note or Series C Note  submitted  is to be  tendered,  the
        principal amount of the Series B Notes or Series C Notes which are to be
        tendered  should  be  stated in the box  entitled  "Principal  Amount of
        Series B Notes or Series C Notes Tendered." New Series B Notes or Series
        C Notes for the remaining  principal  amount of the old Series B Note(s)
        or Series C Note(s) will either be sent to the registered  holder of the
        Series B Note(s)  or Series C Note(s)  tendered  as soon as  practicable
        after the tender has been  accepted or credited to the holder's  account
        in accordance  with  appropriate  book-entry  procedures.  The aggregate
        principal  amount of all  Series B Notes and  Series C Notes  listed are
        deemed to have been tendered unless otherwise indicated. Partial tenders
        of all  Series B Notes  and  Series C Notes  may be made only if (i) the
        principal  amount  tendered is equal to $1,000 or an  integral  multiple
        thereof;  and (ii) the remaining untendered portion of such Series B and
        Series C Note is in a  principal  amount of  $250,000,  or any  integral
        multiple of $1,000 in excess of such amount.

5.      SIGNATURES ON LETTER OF TRANSMITTAL.  This Letter of Transmittal must be
        signed  by the  registered  holder of the  Series B Note(s)  or Series C
        Note(s)  tendered hereby and if the Series B Note(s) or Series C Note(s)
        are registered the signature  must  correspond  exactly with the name as
        written on the face of the Series B Note(s) or Series C Note(s)  without
        alteration, enlargement or any change whatsoever.

        If the  Series B Notes or Series C Notes  tendered  hereby  are owned of
        record  by two or more  joint  owners,  all such  owners  must sign this
        Letter of Transmittal.

        If  this  Letter  of  Transmittal  is  signed  by  trustees,  executors,
        administrators,  guardians, attorneys-in-fact,  officers of corporations
        or others acting in a fiduciary or representative capacity, such persons
        should so indicate when signing, and proper evidence satisfactory to the
        Issuers of their authority to so act must be submitted.

6.      DELIVERY OF  EXCHANGE  NOTES.  Delivery  of Exchange  Notes will be made
        promptly  after the  Expiration  Date for all Series B Notes or Series C
        Notes  properly  tendered and accepted for exchange by the Issuers.  The
        Exchange  Notes of registered  holders will be issued in the name of the
        registered  holder(s)  of the  Series B Notes or Series C Notes and will
        either be mailed to such holder(s) or credited to such holder's  account
        in accordance with  appropriate  book-entry  procedures.  In the case of


                                       11
<PAGE>

        tenders by Notice of  Guaranteed  Delivery,  Exchange  Notes will not be
        delivered until the Letter of Transmittal,  the Series B Notes or Series
        C Notes  relating to such  Notice of  Guaranteed  Delivery  (or a timely
        confirmation of a book-entry transfer of such Series B Notes or Series C
        Notes into the Exchange  Agent's  account of DTC) and all other required
        documents have been received by the Exchange Agent.

7.      SECURITY  TRANSFER  TAXES.  The Issuers will pay all  security  transfer
        taxes, if any,  applicable to the exchange of Series B Notes or Series C
        Notes tendered and accepted pursuant to the Exchange Offer.

8.      BACKUP FEDERAL INCOME TAX  WITHHOLDING AND SUBSTITUTE FORM W9. Under the
        federal  income tax laws,  payments  that may be made by the  Issuers on
        account of Exchange  Notes issued  pursuant to the Exchange Offer may be
        subject to backup withholding at the rate of 31%. In order to avoid such
        backup  withholding,  each tendering holder should complete and sign the
        Substitute  Form W-9 included in this Letter of  Transmittal  and either
        (a) provide  the  correct  taxpayer  identification  number  ("TIN") and
        certify,  under  penalties of perjury,  that the TIN provided is correct
        and that (i) the holder has not been  notified by the  Internal  Revenue
        Service (the "IRS") that the holder is subject to backup  withholding as
        a result of failure to report all  interest or dividends or (ii) the IRS
        has notified  the holder that the holder is no longer  subject to backup
        withholding;  or (b) provide an  adequate  basis for  exemption.  If the
        tendering  holder has not been  issued a TIN and has applied for one, or
        intends to apply for one in the near  future,  such holder  should write
        "Applied  For"  in the  space  provided  for  the  TIN in  Part I of the
        Substitute  Form W-9, sign and date the Substitute Form W-9 and sign the
        Certificate  of  Payee  Awaiting  Taxpayer   Identification  Number.  If
        "Applied  For" is written in Part I, the  Issuers  (or the Paying  Agent
        under the Indenture  governing  the Exchange  Notes) shall retain 31% of
        payments  made to the  tendering  holder  during  the sixty  day  period
        following the date of the Substitute  Form W-9. If the holder  furnishes
        the  Exchange  Agent or the Issuers with its TIN within sixty days after
        the date of the  Substitute  Form W-9, the Issuers (or the Paying Agent)
        shall  remit such  amounts  retained  during the sixty day period to the
        holder  and no  further  amounts  shall be  retained  or  withheld  from
        payments made to the holder thereafter.  If, however, the holder has not
        provided  the  Exchange  Agent or the  Issuers  with its TIN within such
        sixty day period,  the Issuers  (or the Paying  Agent)  shall remit such
        previously  retained  amounts  to the  IRS  as  backup  withholding.  In
        general,  if a holder is an individual,  the TIN is the Social  Security
        number of such individual.  If the Exchange Agent or the Issuers are not
        provided  with the  correct  TIN,  the  holder  may be  subject to a $50
        penalty imposed by the IRS.  Certain holders  (including,  among others,
        all  corporations  and certain foreign  individuals)  are not subject to
        these backup  withholding  and  reporting  requirements.  In order for a
        foreign  individual to qualify as an exempt recipient,  such holder must
        submit a statement (generally,  IRS Form W-8), signed under penalties of
        perjury,  attesting to that individual's  exempt status. Such statements
        can be obtained from the Exchange Agent.

        Failure to complete the Substitute  Form W-9 will not, by itself,  cause
        Notes to be deemed invalidly  tendered,  but may require the Issuers (or
        the Paying  Agent) to withhold  31% of the amount of any payment made on
        account of the Exchange Notes.  Backup  withholding is not an additional
        federal income tax. Rather, the federal income tax liability of a person
        subject  to backup  withholding  will be  reduced  by the  amount of tax
        withheld.  If  withholding  results in an overpayment of taxes, a refund
        may be obtained from the IRS.

9.      WAIVER  OF  CONDITIONS.   Subject  to  limitations   set  forth  in  the
        Prospectus,  the  conditions of the Exchange  Offer may be waived by the
        Issuers,  in whole or in part,  at any time or from time to time, in the
        Issuers' sole  discretion in the case of any Series B Notes and Series C
        Notes tendered.

10.     LOST,  DESTROYED OR STOLEN NOTES.  If any Series B Note or Series C Note
        has been  lost,  stolen,  mutilated  or  destroyed,  the  holder  should


                                       12
<PAGE>

        promptly notify the Trustee,  IBJ Schroder Bank & Trust Company, of such
        fact in  writing,  or call  (212)  858-2103.  The  holder  will  then be
        directed  as to the  steps  that must be taken in order to  replace  the
        Series B Note or Series C Note.  The Letter of  Transmittal  and related
        documents  cannot be processed  until the procedures for replacing lost,
        stolen,  mutilated  or  destroyed  Series B Notes or Series C Notes have
        been followed.

11.     REQUEST FOR  ADDITIONAL  COPIES.  Questions and requests for  additional
        copies of the Prospectus and this Letter of Transmittal  may be obtained
        from the Exchange Agent at the address and telephone number set forth in
        the Prospectus.

12.     PARTICIPATING  BROKER-DEALERS.  Each  Holder  which  is a  Participating
        Broker-Dealer  must advise the Exchange Agent as to the number of copies
        of the Prospectus (including supplements and amendments thereto) it will
        require in order to satisfy the  prospectus  delivery  requirements  for
        resales of  Exchange  Notes which are  exchanged  for Series B Notes and
        Series  C Notes  acquired  by it for  its own  account  as a  result  of
        market-making or other trading activities.

(DO NOT WRITE IN SPACE BELOW)

- --------------------------- -------------------------- -------------------------
   CERTIFICATE SURRENDERED    EXISTING NOTES TENDERED    EXISTING NOTES ACCEPTED
- --------------------------- -------------------------- -------------------------
- --------------------------- -------------------------- -------------------------
- --------------------------- -------------------------- -------------------------
- --------------------------- -------------------------- -------------------------
- --------------------------- -------------------------- -------------------------
- --------------------------- -------------------------- -------------------------
- --------------------------- -------------------------- -------------------------
- --------------------------- -------------------------- -------------------------
- --------------------------- -------------------------- -------------------------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
- --------------------------- ----------------------------------------------------
Dated Received
- --------------------------- ----------------------------------------------------
- --------------------------- ----------------------------------------------------
Accepted by
- --------------------------- ----------------------------------------------------
- --------------------------- ----------------------------------------------------
Checked by
- --------------------------- ----------------------------------------------------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
- --------------------------- ----------------------------------------------------
Delivery Prepared by
- --------------------------- ----------------------------------------------------
- --------------------------- ----------------------------------------------------
Checked by
- --------------------------- ----------------------------------------------------
- --------------------------- ----------------------------------------------------
Date
- --------------------------- ----------------------------------------------------

IMPORTANT TAX INFORMATION

        Under federal income tax laws, a holder whose tendered Series B Notes or
Series C Notes are  accepted  for payment is  required  to provide the  Exchange
Agent (as payor) with such holder's  correct TIN on Substitute Form W-9 below or
otherwise  establish  a basis for  exemption  from backup  withholding.  If such
holder is an individual,  the TIN is his social security number. If the Exchange
Agent is not provided  with the correct TIN, a $50 penalty may be imposed by the
Internal Revenue Service.

        Certain holders  (including,  among others, all corporations and certain
foreign  persons)  are not subject to these  backup  withholding  and  reporting
requirements.  Exempt holders should  indicate their exempt status on Substitute
Form W-9. A foreign  person may qualify as an exempt  recipient by submitting to
the  Exchange  Agent a properly  completed  Internal  Revenue  Service Form W-8,
signed under penalties of perjury,  attesting to that holder's exempt status.  A
Form W-8 can be obtained from the Exchange Agent.

        If  backup  withholding  applies,  the  Exchange  Agent is  required  to
withhold  20% of any  payments  made  to  the  holder  or  other  payee.  Backup
withholding is not an additional  federal income tax. Rather, the federal income
tax liability of persons  subject to backup  withholding  will be reduced by the
amount of tax withheld.  If  withholding  results in an  overpayment of taxes, a
refund may be obtained from the Internal Revenue Service.

                                       13
<PAGE>

PURPOSE OF SUBSTITUTE FORM W-9

        To prevent  backup  withholding  on  payments  made with  respect to the
Exchange  Offer,  the holder is  required  to provide  the  Exchange  Agent with
either:  (i) the holder's  correct TIN by completing the form below,  certifying
that the TIN provided on Substitute  Form W-9 is correct (or that such holder is
awaiting  a TIN) and that (A) the  holder  has  been  notified  by the  Internal
Revenue Service that the holder is subject to backup  withholding as a result of
failure to report all interest or dividends or (B) the Internal  Revenue Service
has  notified  the  holder  that the  holder  is no  longer  subject  to  backup
withholding, or (ii) an adequate basis for exemption.

        PAYER'S NAME:  IBJ SCHRODER BANK & TRUST COMPANY


- ------------------- ------------------------------------------- ----------------
SUBSTITUTE          Part 1 -  PLEASE  PROVIDE  YOUR TIN IN THE  Social Security
                    BOX AT THE RIGHT AND  CERTIFY  BY  SIGNING       Number
Form   W - 9        AND DATING BELOW.                             or Employer
                                                                 Identification
                                                                     Number


                    ------------------------------------------ -----------------
                    Part 2 -  Certification - Under penalties of perjury,
                           I certify that:

                    (1)The  number  shown  on  this  form  is my  correct
                       Taxpayer  Identification  Number  (or I am waiting
                       for a number to be issued to me) and

Department of the   (2)I am not subject to backup withholding  because: (a)
Treasury               I am exempt  from backup  withholding,  or (b) I have not
Internal Revenue       been  notified  by  the  Internal  Revenue  Service  (the
Service                "IRS") that I am subject to backup  withholding as
                       a result of a failure  to report all  interest  or
                       dividends,  or (c) the IRS has  notified me that I
                       am no longer subject to backup withholding.

Payer's  Request for   Certification  Instructions - You must cross out Item (2)
Taxpayer               above if you have been notified by the IRS that you are
Identification         currently subject to backup withholding because of
Number ("TIN")         under-reporting  interest  or  dividends  on your tax
                       return.  However,  if after being notified by the IRS
                       that you  were  subject  to  backup  withholding  you
                       received another  notification  from the IRS that you
                       are no longer subject to backup  withholding,  do not
                       cross out such Item (2).
                     -----------------------------------------------------------
        SIGN HERE      SIGNATURE.  . . . . . . . . . . . . .     Part 3 ---
                       . . . . . . . . . . . . . . . ..  . .
                       . . . . .
                       DATE.  .  . . . . . . . . . . . . . .   Awaiting TIN [ ]
                       .  .  . . . . . . . . . . . . . . . .
- --------------------------------------------------------------------------------

    NOTE:     FAILURE  TO  COMPLETE  AND  RETURN  THIS FORM MAY RESULT IN BACKUP
              WITHHOLDING  OF 31% OF ANY  PAYMENTS  MADE TO YOU  PURSUANT TO THE
              OFFER.  PLEASE REVIEW THE ENCLOSED GUIDELINES FOR CERTIFICATION OF
              TAXPAYER   IDENTIFICATION   NUMBER  ON  SUBSTITUTE  FORM  W-9  FOR
              ADDITIONAL DETAILS.

              YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE BOX
              IN PART 3 OF SUBSTITUTE FORM W-9.


                                       14
<PAGE>



- --------------------------------------------------------------------------------
             CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER

I certify under penalties of perjury that a taxpayer  identification  number has
not been issued to me, and either (1) I have mailed or delivered an  application
to receive a taxpayer  identification number to the appropriate Internal Revenue
Service Center or Social Security Administration Office, or (2) I intend to mail
or deliver an  application  in the near future.  I  understand  that if I do not
provide a  taxpayer  identification  number by the time of  payment,  31% of all
reportable  payments made to me will be withheld,  but that such amounts will be
refunded to me if I then provide a Taxpayer  Identification  Number within sixty
(60) days.

Signature.  . . . . . . . . . . . . . . . .  Date.  . . . . . . . . ., 19 . . .
- --------------------------------------------------------------------------------

                                       15
<PAGE>



                                                                   EXHIBIT 5.1
                                  April 8, 1998


Abraxas Petroleum Corporation
500 North Loop 1604 East
Suite 100
San Antonio, Texas  78232


                          Re:   Registration Statement No. 333-____on Form S-4
                                filed by Abraxas Petroleum Corporation

Dear Sirs:

        We have  acted as counsel to  Abraxas  Petroleum  Corporation,  a Nevada
corporation  (the  "Company"),  in connection  with the  registration  under the
Securities  Act of 1933,  as amended,  pursuant to  Registration  Statement  No.
333-______  on Form S-4  (the  "Registration  Statement"),  of an  aggregate  of
$275,000,000  principal  amount of the  Company's 11 1/2% Senior Notes Due 2004,
Series D (the "Exchange Notes").

        We  have  examined  and are  familiar  with  originals  or  copies,  the
authenticity  of which have been  established to our  satisfaction,  of all such
documents, corporate records, certificates of officers of the Company and public
officials,  and other  instruments  as we have deemed  necessary  to express the
opinion  hereinafter  set  forth.  In  expressing  our  opinion  as to the valid
issuance of shares of the Exchange Notes, we express no opinion as to compliance
with federal and state securities laws.

        Based upon the foregoing, it is our opinion that:

        (1) the  Exchange  Notes  to be  issued  and  sold as  described  in the
Registration  Statement have been duly and validly authorized for such issue and
sale and, when so issued, sold and delivered, will be validly issued, fully paid
and nonassessable; and

        (2) the Exchange Notes, when issued, sold and delivered, will be binding
obligations of the Company except to the extent that the  enforceability  of the
Exchange   Notes  may  be  limited  by   bankruptcy,   insolvency,   moratorium,
reorganization,  fraudulent conveyance or other laws or decisions relating to or
affecting  the  enforcement  of  creditors'  rights  generally  and  by  general
principles of equity (regardless of whether such enforceability is considered in
a proceeding in equity or at law).

        The  opinion  expressed  herein is  limited  to the laws of the State of
Texas,  the corporation  laws of the State of Nevada and the federal laws of the
United States.



<PAGE>


        We hereby consent to the use of our name in the  Registration  Statement
as counsel who has expressed an opinion upon certain legal matters in connection
with the  issue  and sale of the  Exchange  Notes  (including  specifically  the
reference  contained  under the caption "Legal  Matters") and to the use of this
opinion as an exhibit to the Registration Statement.

                                            Yours very truly,

                                            COX & SMITH INCORPORATED


                                            By:    /s/Steven R. Jacobs
                                                 Steven R. Jacobs,
                                                 For the Firm


<PAGE>
                                                                    EXHIBIT 5.2

[Opinion of Osler, Hoskin & Harcourt]



                                April 8, 1998


Canadian Abraxas Petroleum Limited
300 - 5th Avenue, 12th Floor
Calgary, Alberta

        Re:    Registration Statement on Form S-4 filed by Canadian
               Abraxas Petroleum Limited

Dear Sirs:

         We have acted as counsel to  Canadian  Abraxas  Petroleum  Limited,  an
Alberta  corporation (the "Company"),  in connection with the registration under
the Securities Act of 1933, as amended,  pursuant to  Registration  Statement on
Form  S-4  (the  "Registration  Statement"),  of an  aggregate  of  $275,000,000
principal  amount of the Company's 11 1/2% Senior Notes Due 2004,  Series D (the
"Exchange Notes").

         We have  examined  and are  familiar  with  originals  or  copies,  the
authenticity  of which have been  established to our  satisfaction,  of all such
documents, corporate records, certificates of officers of the Company and public
officials,  and other  instruments  as we have deemed  necessary  to express the
opinion  hereinafter  set  forth.  In  expressing  our  opinion  as to the valid
issuance of shares of the Exchange Notes, we express no opinion as to compliance
with federal and state securities laws.

         Based on the foregoing, it is our opinion that:

         1.  the  Exchange  Notes to be  issued  and  sold as  described  in the
Registration  Statement have been duly and validly authorized for such issue and
sale and, when so issued, sold and delivered, will be validly issued, fully paid
and non-assessable; and

         2. the Exchange Notes to be issued, sold and delivered, will be binding
obligations of the Company.

         Our opinion is subject to the following qualifications:

         1. the  enforceability  of the  Exchange  Notes is subject to or may be
limited  by  applicable  bankruptcy,  insolvency,  reorganization,  arrangement,
moratorium  or other  similar  laws  relating  to or  affecting  the  rights  of
creditors generally;

         2. the  enforceability  of the  Exchange  Notes is  subject  to general
principles  of  equity,  including  the fact that  equitable  remedies,  such as
specific  performance and injunctions,  may only be awarded in the discretion of
the court;

         3. an Alberta  court will only render a judgment in lawful  currency of
Canada;

         4.  each  of the  Exchange  Notes  are  stated  to be  governed  by and
construed in accordance  with the laws of the State of New York. With respect to
any opinions  relating to  enforceability of the Exchange Notes, we have assumed
that the laws of the State of New York are not  materially  different from those
of the Province of Alberta and the laws of Canada applicable therein.

                                       3
<PAGE>

         The opinion  expressed herein is limited to the laws of the Province of
Alberta and the federal laws of Canada applicable therein.

         This  opinion is intended  solely for the use of the persons to whom it
is addressed in connection with the transactions  provided for in the Agreements
and may not be relied  upon by any other  person or for any other  purpose,  nor
quoted  from or  referred to in any other  document,  without our prior  written
consent.

         We hereby consent to the use of our name in the Registration  Statement
as counsel who has expressed an opinion upon certain legal matters in connection
with the  issue  and sale of the  Exchange  Notes  (including  specifically  the
references  contained under the captions  "Enforceability  of Civil  Liabilities
Against Foreign  Persons" and "Legal Matters") and to the use of this opinion as
an exhibit to the Registration Statement.


                                                Yours very truly,


                                                /s/ Osler, Hoskin & Harcourt



                                       4
<PAGE>


                                                                   EXHIBIT 23.1

                         CONSENT OF INDEPENDENT AUDITORS


We consent to the  reference to our firm under the caption  "Experts" and to the
use of our reports dated March 17, 1998 in the Registration Statement (Form S-4)
and related  Prospectus of Abraxas  Petroleum  Corporation and Canadian  Abraxas
Petroleum  Limited for the  Registration of $275,000,000 of 11 1/2% Senior Notes
due 2004.



                                            /s/ Ernst & Young LLP


San Antonio, Texas
April 8, 1998

                                       5
<PAGE>
                                                                  EXHIBIT 12.1

     STATEMENT REGARDING COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

                                       Years Ended December 31,
                               ----------------------------------------------- 
                                         (dollars in thousands)
                                 1993      1994      1995      1996     1997
                               --------   -------   -------   -------  -------

Consolidated pre tax income
  (loss) from continuing
  operations                   $(1,393)   $  113    $(1,208)  $2,116   $(10,376)
      
Interest                         2,531     2,359      3,911    6,706     25,586
Net amortization of debt
   issuance expense                649       400        214      280      1,260
                               --------   -------   -------   -------  --------
  Earnings (loss)                1,787     2,872      2,917    9,102     16,470 
                               ========   =======   =======   =======  ========
Interest                         2,531     2,359      3,911    6,706     25,586
Net amortization of debt
   issuance expense                649       400        214      280      1,260
                               --------   -------   -------   -------  --------
  Fixed Charges                  3,180     2,759      4,125    6,986     26,876 
                               ========   =======   =======   =======  ========
Ratio or (deficiency of 
  Earnings to Fixed
  Charges                      $(1,393)  1.04 to 1  $(1,208) 1.30 to 1 $(10,376)


<PAGE>


                                                                  EXHIBIT 23.2


                                April 7, 1998



Abraxas Petroleum Corporation
500 North Loop 1604 East, Suite 100
San Antonio, Texas 78232

Gentlemen:

     We hereby consent to the  incorporation in your  Registration  Statement on
Form  S-4 of  the  references  to  DeGolyer  and  MacNaughton  in the  "Reserves
Information" section on page 44 and in the "Experts" section on page 101, and to
the use by reference of  information  contained in our  "Appraisal  Report as of
December 31, 1997 on Certain Interests owned by Abraxas  Petroleum  Corporation,
provided,  however,  that since the crude oil, condensate,  natural gas liquids,
and natural gas reserves  estimates  set forth in this Report have been combined
with  reserves  estimates of other  petroleum  consultants,  we are  necessarily
unable  to  verify  the  accuracy  of  the  reserves  values  contained  in  the
aforementioned Registration Statement.


                                                Very truly yours,



                                               /s/ DeGOLYER and MacNAUGHTON






<PAGE>
                                                                EXHIBIT 23.3



                   CONSENT OF INDEPENDENT PETROLEUM ENGINEERS


         We hereby  consent  to the  reference  to our firm  under  the  caption
"Business - Reserves Information" and "Experts" in the Registration Statement on
Form S-4 (the  "Registration  Statement") of Abraxas  Petroleum  Corporation and
Canadian Abraxas Petroleum Limited.



                                /s/ McDaniel & Associates Consultants, Ltd.





Calgary, Alberta
April 8, 1998


<PAGE>


                                                                 EXHIBIT 23.5



                  CONSENT OF INDEPENDENT CHARTERED ACCOUNTANTS


To the Board of Directors of
Canadian Abraxas Petroleum Limited


We consent to the use of our report  included herein and to the reference to our
firm  under  the  heading  "Experts"  in the  Prospectus  and  the  Registration
Statement.


/s/ KPMG

Calgary, Canada
April 8, 1998




<PAGE>

                                                                  EXHIBIT 24.1

                                POWER OF ATTORNEY


        KNOW ALL MEN BY THESE PRESENTS,  that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Abraxas   Petroleum   Corporation   and   any  or  all   amendments   (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


        Dated:  April 8, 1998.



                                            /s/ Franklin Burke
                                            Franklin Burke



<PAGE>
                                                                  EXHIBIT 24.2

                                POWER OF ATTORNEY


        KNOW ALL MEN BY THESE PRESENTS,  that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Abraxas   Petroleum   Corporation   and   any  or  all   amendments   (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


        Dated:  April 8, 1998.



                                            /s/ Harold D. Carter
                                            Harold D. Carter



<PAGE>
                                                              EXHIBIT 24.3

                                POWER OF ATTORNEY


        KNOW ALL MEN BY THESE PRESENTS,  that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Abraxas   Petroleum   Corporation   and   any  or  all   amendments   (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


        Dated:  April 8, 1998.



                                            /s/ Robert D. Gershen
                                            Robert D. Gershen



<PAGE>
                                                                  EXHIBIT 24.4

                                POWER OF ATTORNEY


        KNOW ALL MEN BY THESE PRESENTS,  that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Abraxas   Petroleum   Corporation   and   any  or  all   amendments   (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


        Dated:  April 8, 1998.



                                            /s/ Richard M. Kleberg, III
                                            Richard M. Kleberg, III



<PAGE>
                                                                  EXHIBIT 24.5

                                POWER OF ATTORNEY


        KNOW ALL MEN BY THESE PRESENTS,  that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Abraxas   Petroleum   Corporation   and   any  or  all   amendments   (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


        Dated:  April 8, 1998.



                                            /s/ James C. Phelps
                                            James C. Phelps




<PAGE>

                                                                  EXHIBIT 24.6

                                POWER OF ATTORNEY


        KNOW ALL MEN BY THESE PRESENTS,  that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Abraxas   Petroleum   Corporation   and   any  or  all   amendments   (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


        Dated:  April 8, 1998.



                                            /s/ Paul A. Powell, Jr.
                                            Paul A. Powell, Jr.



<PAGE>

                                                                  SECTION 24.7

                                POWER OF ATTORNEY


        KNOW ALL MEN BY THESE PRESENTS,  that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Abraxas   Petroleum   Corporation   and   any  or  all   amendments   (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


        Dated:  April 8, 1998.



                                            /s/ Richard M. Riggs
                                            Richard M. Riggs




<PAGE>


                                                                  EXHIBIT 24.8

                                POWER OF ATTORNEY


        KNOW ALL MEN BY THESE PRESENTS,  that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Canadian  Abraxas  Petroleum  Limited  and  any  or  all  amendments  (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


        Dated:  April 8, 1998.



                                            /s/ Donald A. Engle
                                            Donald A. Engle



<PAGE>
                                                                  EXHIBIT 24.9

                                POWER OF ATTORNEY


        KNOW ALL MEN BY THESE PRESENTS,  that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Canadian  Abraxas  Petroleum  Limited  and  any  or  all  amendments  (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


        Dated:  April 8, 1998.



                                            /s/ Roger L. Bruton
                                            Roger L. Bruton




<PAGE>
                                                                 EXHIBIT 25.1


                         -------------------------------
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D. C. 20549
                                 ---------------
                                    FORM T-1

                            STATEMENT OF ELIGIBILITY
                   UNDER THE TRUST INDENTURE ACT OF 1939 OF A
                    CORPORATION DESIGNATED TO ACT AS TRUSTEE

                      CHECK IF AN APPLICATION TO DETERMINE
                      ELIGIBILITY OF A TRUSTEE PURSUANT TO
                                SECTION 305(b)(2)
                                 ---------------

                        IBJ SCHRODER BANK & TRUST COMPANY
               (Exact name of trustee as specified in its charter)

          New York                                         13-5375195
(Jurisdiction of incorporation                        (I.R.S. employer
or organization if not a U.S. national bank)           identification No.)

One State Street, New York, New York                         10004
(Address of principal executive offices)                   (Zip code)

                        IBJ SCHRODER BANK & TRUST COMPANY
                                One State Street
                            New York, New York 10004
                                 (212) 858-2000
            (Name, address and telephone number of agent for service)

                          ABRAXAS PETROLEUM CORPORATION
                       CANADIAN ABRAXAS PETROLEUM LIMITED
              (Exact names of obligors as specified in its charter)

            Nevada                                          74-2584033
            Canada                                              N/A
(State or other jurisdiction of                          (I.R.S. employer
incorporation or organization)                            identification No.)

500 North Loop 1604 East, Suite 100
      San Antonio, Texas                                         78232
(Address of principal executive offices)                      (Zip code)

                     11 1/2% Senior Notes due 2004, Series D
                              --------------------
                         (Title of indenture securities)

                                       1
<PAGE>


Item 1.               General information

                      Furnish the following information as to the trustee:

(a)                   Name  and  address  of  each   examining  or   supervising
                      authority to which it is subject.

                         New York State Banking Department,
                         Two Rector Street, New York, New York

                         Federal Deposit Insurance Corporation, Washington, D.C.

                         Federal Reserve Bank of New York Second District,
                         33 Liberty Street, New York, New York

        (b) Whether it is authorized to exercise corporate trust powers.

                             Yes

Item 2.        Affiliations with the Obligors.

                      If the obligors are an affiliate of the trustee,  describe
                      each such affiliation.

                      The obligors are not an affiliate of the trustee.


Item 13.              Defaults by the Obligors.


               (a)    State  whether there is or has been a default with respect
                      to the securities under this indenture. Explain the nature
                      of any such default.

                             None

               (b)    If the trustee is a trustee under another  indenture under
                      which any other securities, or certificates of interest or
                      participation in any other securities, of the obligors are
                      outstanding,  or is trustee for more than one  outstanding
                      series of securities  under the  indenture,  state whether
                      there  has been a  default  under  any such  indenture  or
                      series,  identify the  indenture or series  affected,  and
                      explain the nature of any such default.

                             None

                      List of exhibits.

                      List below all exhibits filed as part of this statement of
                      eligibility.

        *1.           A copy of the Charter of IBJ Schroder Bank & Trust Company
                      as  amended  to  date.   (See  Exhibit  1A  to  Form  T-1,
                      Securities and Exchange Commission File No. 22-18460).

        *2.           A copy of the  Certificate  of Authority of the trustee to
                      Commence Business (Included in Exhibit 1 above).

        *3.           A copy of the  Authorization  of the  trustee to  exercise
                      corporate trust powers,  as amended to date (See Exhibit 4
                      to Form T-1,  Securities and Exchange  Commission File No.
                      22-19146).
                                       2
<PAGE>

        *4.           A copy of the existing By-Laws of the trustee,  as amended
                      to  date  (See  Exhibit  4 to  Form  T-1,  Securities  and
                      Exchange Commission File No. 22-19146).

         5.           Not Applicable

         6.           The  consent  of  United  States   institutional   trustee
                      required by Section 321(b) of the Act.

         7.           A copy of the latest  report of  condition  of the trustee
                      published  pursuant  to  law or  the  requirements  of its
                      supervising or examining authority.

*       The Exhibits thus  designated  are  incorporated  herein by reference as
        exhibits  hereto.  Following  the  description  of  such  Exhibits  is a
        reference  to  the  copy  of  the  Exhibit  heretofore  filed  with  the
        Securities  and  Exchange  Commission,  to  which  there  have  been  no
        amendments or changes.

                                      NOTE

        In answering any item in this Statement of Eligibility  which relates to
        matters  peculiarly  within  the  knowledge  of  the  obligors  and  its
        directors or officers, the trustee has relied upon information furnished
        to it by the obligors.

        Inasmuch  as this Form T-1 is filed  prior to the  ascertainment  by the
        trustee of all facts on which to base responsive  answers to Item 2, the
        answer to said Item is based on incomplete information.

        Item 2, may,  however,  be  considered as correct  unless  amended by an
        amendment to this Form T-1.

        Pursuant to General Instruction B, the trustee has responded to Items 1,
        2 and 16 of this form  since to the best  knowledge  of the  trustee  as
        indicated  in Item  13,  the  obligors  are  not in  default  under  any
        indenture under which the applicant is trustee.


                                       3
<PAGE>






                                    SIGNATURE

                      Pursuant to the requirements of the Trust Indenture Act of
        1939,  the trustee,  IBJ Schroder  Bank & Trust  Company,  a corporation
        organized and existing under the laws of the State of New York, has duly
        caused this  statement of  eligibility to be signed on its behalf by the
        undersigned, thereunto duly authorized, all in the City of New York, and
        State of New York, on the 2nd day of April, 1998.

                                    IBJ SCHRODER BANK & TRUST COMPANY



                                    By:     /s/ Stephen J. Giurlando
                                         Stephen J. Giurlando
                                         Assistant Vice President








                                       4
<PAGE>






                                    Exhibit 6

                               CONSENT OF TRUSTEE



        Pursuant to the  requirements  of Section 321(b) of the Trust  Indenture
Act of 1939,  as  amended,  in  connection  with the issue by Abraxas  Petroleum
Corporation and Canadian Abraxas Petroleum Limited,  of its 11 1/2% Senior Notes
due 2004,  Series D, we hereby consent that reports of  examinations by Federal,
State, Territorial, or District authorities may be furnished by such authorities
to the Securities and Exchange Commission upon request therefor.


                                    IBJ SCHRODER BANK & TRUST COMPANY



                                    By:  /s/ Stephen J. Giurlando
                                          Stephen J. Giurlando
                                          Assistant Vice President





Dated: April 2, 1998

                                       5
<PAGE>


                                    EXHIBIT 7

<TABLE>
<CAPTION>

                       CONSOLIDATED REPORT OF CONDITION OF
                        IBJ SCHRODER BANK & TRUST COMPANY
                              of New York, New York
                      And Foreign and Domestic Subsidiaries


                         Report as of December 31, 1997



                                                                               Dollar Amounts
                                                                                in Thousands


                                     ASSETS
<S>                                                                             <C>   
1. Cash and balance due from depository institutions:
    a.  Noninterest-bearing balances and currency and coin......................$   45,276
    b.  Interest-bearing balances...............................................$  121,534

2.  Securities:
    a.  Held-to-maturity securities.............................................$  184,821
    b.  Available-for-sale securities...........................................$   74,043

3.  Federal funds sold and securities  purchased  under  agreements to resell in
    domestic offices of the bank and of its Edge and Agreement  subsidiaries and
    in IBFs:

    Federal Funds sold and Securities purchased under agreements to resell......$  202,104

4. Loans and lease financing receivables:
    a.  Loans and leases, net of unearned income................................$1,797,414
    b.  LESS: Allowance for loan and lease losses...............................$   61,962
    c.  LESS: Allocated transfer risk reserve...................................$       -0-
    d.  Loans and leases, net of unearned income, allowance, and reserve........$1,735,452

5.  Trading assets held in trading accounts.....................................$      479

6.  Premises and fixed assets (including capitalized leases)....................$    2,952

7.  Other real estate owned.....................................................$       -0-

8.  Investments in unconsolidated subsidiaries and associated companies.........$       -0-

9.  Customers' liability to this bank on acceptances outstanding................$    1,447

10. Intangible assets...........................................................$       -0-

11. Other assets................................................................$   67,256

12. TOTAL ASSETS................................................................$2,435,364
</TABLE>
                                       6
<PAGE>

<TABLE>
<CAPTION>

                                   LIABILITIES

<S>                                                                             <C>
13. Deposits:
    a.  In domestic offices.....................................................$  791,520

    (1) Noninterest-bearing ....................................................$  247,397
    (2) Interest-bearing........................................................$  544,123

    b.  In foreign offices, Edge and Agreement subsidiaries, and IBFs...........$1,229,810

    (1) Noninterest-bearing.....................................................$   14,607
    (2) Interest-bearing........................................................$1,215,203

14. Federal funds purchased and securities  sold under  agreements to repurchase
    in domestic offices of the bank and of its Edge and Agreement  subsidiaries,
    and in IBFs:

    Federal Funds purchased and Securities sold under agreements to repurchase..$   10,000

15. a.  Demand notes issued to the U.S. Treasury................................$    5,000

    b.  Trading Liabilities.....................................................$      108

16. Other borrowed money:
    a.  With a remaining maturity of one year or less...........................$   83,453
    b.  With a remaining maturity of more than one year.........................$    1,763
    c.  With a remaining maturity of more than three years......................$    2,242

17. Not applicable.

18. Bank's liability on acceptances executed and outstanding....................$    1,447

19. Subordinated notes and debentures...........................................$       -0-

20. Other liabilities...........................................................$   70,284

21. TOTAL LIABILITIES...........................................................$2,195,627

22. Limited-life preferred stock and related surplus............................$       -0-

                                 EQUITY CAPITAL


23. Perpetual preferred stock and related surplus...............................$       -0-

24. Common stock................................................................$   29,649

25. Surplus (exclude all surplus related to preferred stock)....................$  217,008

26. a.  Undivided profits and capital reserves..................................$   (7,130)

    b.  Net unrealized gains (losses) on available-for-sale securities..........$      210

27. Cumulative foreign currency translation adjustments.........................$       -0-

28. TOTAL EQUITY CAPITAL........................................................$  239,737

29. TOTAL LIABILITIES AND EQUITY CAPITAL........................................$2,435,364

</TABLE>
                                       7

<PAGE>


<TABLE> <S> <C>

<ARTICLE>                     5
<MULTIPLIER>                                   1000
       
<S>                             <C>
<PERIOD-TYPE>                   Year
<FISCAL-YEAR-END>                              DEC-31-1997
<PERIOD-START>                                 JAN-1-1997
<PERIOD-END>                                   Dec-30-1997
<CASH>                                          2836
<SECURITIES>                                       0
<RECEIVABLES>                                  14638
<ALLOWANCES>                                     (36)
<INVENTORY>                                      367
<CURRENT-ASSETS>                               18313
<PP&E>                                        385442
<DEPRECIATION>                                (74597)
<TOTAL-ASSETS>                                338528
<CURRENT-LIABILITIES>                          27457
<BONDS>                                       248617
                              0
                                        0
<COMMON>                                          63
<OTHER-SE>                                     26750
<TOTAL-LIABILITY-AND-EQUITY>                  338528
<SALES>                                        70931
<TOTAL-REVENUES>                               70931
<CGS>                                              0
<TOTAL-COSTS>                                  55781
<OTHER-EXPENSES>                                 571
<LOSS-PROVISION>                                   0
<INTEREST-EXPENSE>                             24620
<INCOME-PRETAX>                               (10041)
<INCOME-TAX>                                   (3891)
<INCOME-CONTINUING>                            (6485)
<DISCONTINUED>                                     0
<EXTRAORDINARY>                                    0
<CHANGES>                                          0
<NET-INCOME>                                   (6668)
<EPS-PRIMARY>                                  (1.11)
<EPS-DILUTED>                                  (1.11)
        

</TABLE>


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