ABRAXAS PETROLEUM CORPORATION
                      CANADIAN ABRAXAS PETROLEUM LIMITED
                                 $215,000,000
                          11 1/2% Senior Notes due 2004


                              PURCHASE AGREEMENT



                                                              November 5, 1996


BT SECURITIES CORPORATION
BANKERS TRUST INTERNATIONAL PLC
JEFFERIES & COMPANY INC.
ING BARING (U.S.) SECURITIES CORPORATION
c/o BT Securities Corporation
  One Bankers Trust Plaza
  130 Liberty Street
  New York, New York  10006


Ladies and Gentlemen:

            Abraxas Petroleum Corporation, a Nevada corporation (the "Company"),
and Canadian Abraxas Petroleum  Limited, a Canada corporation and a wholly-owned
subsidiary of the Company ("Canadian Abraxas" and together with the Company, the
"Issuers"),  hereby confirm their agreement with you (the "Initial  Purchasers")
as set forth below.

            1. The  Securities.  Subject  to the  terms  and  conditions  herein
contained,  the  Issuers  propose  to issue and sell to the  Initial  Purchasers
$215,000,000  aggregate  principal amount of their 11 1/2% Senior Notes due 2004
(the "Notes"). The Notes will be guaranteed (collectively,  the "Guarantees") on
a senior  basis by each of the  Company's  future  Restricted  Subsidiaries  (as
defined in the Indenture) (collectively, the "Subsidiary Guarantors"). The Notes
and the Guarantees are collectively referred to herein as the "Securities".  The
Notes are to be issued under an indenture  (the  "Indenture")  to be dated as of
November  14,  1996 by and  among  the  Issuers  and IBJ  Schroder  Bank & Trust
Company, as Trustee (the "Trustee").

            The Securities are being offered in connection  with and conditioned
upon (i) the Issuers'  acquisition of 100% of the capital stock of CGGS Canadian
Gas Gathering Systems Inc. ("CGGS"),  (ii) the Company's  acquisition of the oil
and gas producing properties located in the Portilla and Happy Fields ("Portilla
and Happy") (the acquisitions of CGGS and Portilla and Happy being  collectively
referred to herein as the "Pending  Acquisitions" and the agreements executed or

                                     1




to be executed by the Issuers in connection  with the Pending  Acquisitions  are
collectively referred to herein as the "Acquisition Agreements"),  and (iii) the
Issuers' entering into a new $40.0 million senior revolving credit facility (the
"New Credit Facility").

            The  Securities  will be offered and sold to the Initial  Purchasers
without  being  registered  under the  Securities  Act of 1933,  as amended (the
"Act"), in reliance on exemptions therefrom.

            In  connection  with the sale of the  Securities,  the Issuers  have
prepared  a  preliminary   offering  memorandum  dated  October  21,  1996  (the
"Preliminary  Memorandum"),  and a final offering  memorandum  dated November 6,
1996  (the  "Final  Memorandum";   the  Preliminary  Memorandum  and  the  Final
Memorandum  each herein being  referred to as a  "Memorandum")  setting forth or
including  a  description  of the  terms  of the  Securities,  the  terms of the
offering of the Securities,  a description of the Pending  Acquisitions  and the
New Credit Agreement, a description of the Issuers and the Subsidiary Guarantors
and any  material  developments  relating  to the  Issuers  and  the  Subsidiary
Guarantors  occurring  after the date of the most  recent  historical  financial
statements included therein.

            The Initial Purchasers and their direct and indirect  transferees of
the  Securities  will be entitled to the  benefits  of the  Registration  Rights
Agreement  to be dated as of the Closing Date (as  defined)  (the  "Registration
Rights  Agreement"),  pursuant  to which the  Issuers  will  agree,  among other
things, to file with the Securities and Exchange  Commission (the "Commission"),
under the  circumstances set forth therein,  (i) a registration  statement under
the Act (the "Exchange Offer Registration Statement"),  relating to Senior Notes
due 2004 of the Issuers (the  "Exchange  Notes") to be offered in exchange  (the
"Exchange  Offer") for the Notes,  and (ii) as and to the extent required by the
Registration Rights Agreement,  a shelf registration  statement pursuant to Rule
415 under the Act (the "Shelf  Registration  Statement"  and,  together with the
Exchange Offer Registration Statement, the "Registration Statements"),  relating
to the resale by certain holders of the Notes,  and to use their best efforts to
cause such  Registration  Statements  to be declared  effective.  This  Purchase
Agreement (this "Agreement"),  the Notes, the Guarantees,  the Indenture and the
Registration  Rights  Agreement are hereinafter  referred to collectively as the
"Operative Documents."

            2.  Representations  and  Warranties.   The  Issuers,   jointly  and
severally,  represent  and  warrant  to and  agree  with  each  of  the  Initial
Purchasers that:

            (a) Neither the Preliminary  Memorandum as of its date nor the Final
      Memorandum nor any amendment or supplement  thereto as of the date thereof
      and at all times subsequent  thereto up to the Closing Date (as defined in
      Section 3 below)  contained or contains any untrue statement of a material
      fact or omitted or omits to state a material  fact  necessary  to make the
      statements  therein,  in the light of the  circumstances  under which they
      were made, not misleading,  except that the representations and warranties
      set forth in this  Section  2(a) do not apply to  statements  or omissions
      
                                     2




      made in reliance upon and in conformity with  information  relating to any
      of the  Initial  Purchasers  furnished  to the  Issuers  in writing by the
      Initial Purchasers  expressly for use in the Preliminary  Memorandum,  the
      Final Memorandum or any amendment or supplement thereto.

            (b) As of June 30, 1996, the Company had the authorized,  issued and
      outstanding  capitalization set forth in the Final Memorandum;  all of the
      subsidiaries  of the  Company  are listed on  Schedule  I attached  hereto
      (each, a "Subsidiary" and collectively,  the  "Subsidiaries");  all of the
      outstanding  shares of  capital  stock of the  Issuers  and of each of the
      Subsidiaries of the Company have been, and as of the Closing Date will be,
      duly authorized and validly issued,  are fully paid and  nonassessable and
      were not issued in violation of any preemptive or similar  rights;  all of
      the outstanding shares of capital stock of Canadian Abraxas and of each of
      the  Subsidiaries  (other than with respect to the shares of capital stock
      of Grey Wolf  Exploration  Ltd.,  an Alberta  corporation  ("Grey  Wolf"),
      Cascade Oil & Gas Ltd., an Alberta  corporation  ("Cascade"),  and Western
      Associated  Energy  Corporation,  a Texas  corporation  ("Western"),  such
      shares of capital  stock owned by others as of the Closing Date and as set
      forth in the Final Memorandum) will be owned by the Company free and clear
      of all  liens,  encumbrances,  equities  and  claims  or  restrictions  on
      transferability (other than those imposed by the Act and the securities or
      "Blue Sky" laws of certain  jurisdictions) or voting;  except as set forth
      in the Final  Memorandum,  as of June 30, 1996, there were no (i) options,
      warrants or other rights to purchase, (ii) agreements or other obligations
      of the  Issuers to issue or (iii) other  rights to convert any  obligation
      into,  or  exchange  any  securities  for,  shares of capital  stock of or
      ownership   interests  in  either  Issuer  or  any  of  the   Subsidiaries
      outstanding.  Except for the  Subsidiaries  and as  disclosed in the Final
      Memorandum,  none of the Issuers or any of the Subsidiaries owns, directly
      or  indirectly,  any  shares  of  capital  stock or any  other  equity  or
      long-term  debt  securities  or have  any  equity  interest  in any  firm,
      partnership, joint venture or other entity.

            (c) Each of the Issuers and the  Subsidiaries is duly  incorporated,
      validly  existing and in good  standing  under the laws of its  respective
      jurisdiction of  incorporation  and has all requisite  corporate power and
      authority to own its  properties and conduct its business as now conducted
      and as  described  in the Final  Memorandum;  each of the  Issuers and the
      Subsidiaries is duly qualified to do business as a foreign  corporation in
      good standing in all other jurisdictions where the ownership or leasing of
      its properties or the conduct of its business requires such qualification,
      except where the failure to be so qualified would not,  individually or in
      the  aggregate,  have a material  adverse  effect on the general  affairs,
      management,  business,  condition  (financial or otherwise),  prospects or
      results of operations of the Issuers and the Subsidiaries taken as a whole
      (any such event, a "Material Adverse Effect").

            (d)  Each of the  Issuers  and the  Subsidiaries  has all  requisite
      corporate  power  and  authority  to  execute,  deliver  and  perform  its
      respective  obligations  under  this  Agreement  and the  other  Operative
      Documents  to  which  it is a party  and to  consummate  the  transactions
      
                                    3




      contemplated hereby and thereby, including,  without limitation, the power
      and authority to issue, sell and deliver the Securities as contemplated by
      this Agreement.

            (e) This  Agreement has been duly and validly  authorized,  executed
      and delivered by each of the Issuers.

            (f) The  Indenture  has been  duly  and  validly  authorized  by the
      Issuers and, when duly executed and delivered in accordance with its terms
      (assuming the due execution and delivery thereof by the Trustee),  will be
      the  valid and  legally  binding  agreement  of the  Issuers,  enforceable
      against  each  of  them in  accordance  with  its  terms,  except  as such
      enforceability may be limited by bankruptcy,  insolvency,  reorganization,
      moratorium and other similar laws now or hereinafter in effect relating to
      or affecting creditors' rights generally,  by general equitable principles
      (regardless of whether such  enforceability  is considered in a proceeding
      in  equity  or at law);  and the  Indenture  meets  the  requirements  for
      qualification  under the Trust  Indenture  Act of 1939,  as  amended  (the
      "TIA").

            (g) The Notes have been duly and validly authorized for issuance and
      sale to the Initial  Purchasers by the Issuers  pursuant to this Agreement
      and, when issued and  authenticated  in  accordance  with the terms of the
      Indenture and delivered  against  payment  therefor in accordance with the
      terms  hereof,  will be the legally valid and binding  obligations  of the
      Issuers,  enforceable  against each of them in accordance with their terms
      and   entitled  to  the  benefits  of  the   Indenture,   except  as  such
      enforceability may be limited by bankruptcy,  insolvency,  reorganization,
      moratorium and other similar laws now or hereinafter in effect relating to
      or affecting creditors' rights generally,  by general equitable principles
      (regardless of whether such  enforceability  is considered in a proceeding
      in  equity or at law) or the  discretion  of the  court  before  which any
      proceeding therefor may be brought.

            (h) The  Exchange  Notes have been duly and validly  authorized  for
      issuance by the Issuers and, when issued and  authenticated  in accordance
      with the terms of the Indenture, the Registration Rights Agreement and the
      Exchange Offer,  will be the legally valid and binding  obligations of the
      Issuers,  enforceable  against each of them in accordance with their terms
      and   entitled  to  the  benefits  of  the   Indenture,   except  as  such
      enforceability may be limited by bankruptcy,  insolvency,  reorganization,
      moratorium and other similar laws now or hereinafter in effect relating to
      or affecting creditors' rights generally,  by general equitable principles
      (regardless of whether such  enforceability  is considered in a proceeding
      in  equity or at law) or the  discretion  of the  court  before  which any
      proceeding therefor may be brought.

            (i) The  Registration  Rights  Agreement has been duly authorized by
      the Issuers and, when duly executed and delivered by the Issuers (assuming
      the due execution and delivery  thereof by you), will be the legally valid
      and binding obligation of the Issuers, enforceable against each of them in
      accordance with its terms, except as such enforceability may be limited by
      
                                     4





      bankruptcy, insolvency, reorganization,  moratorium and other similar laws
      now or hereinafter in effect  relating to or affecting  creditors'  rights
      generally,  by general  equitable  principles  (regardless of whether such
      enforceability  is  considered in a proceeding in equity or at law) or the
      discretion  of the court  before  which  any  proceeding  therefor  may be
      brought  and,  as  to  rights  of  indemnification  and  contribution,  by
      principles  of  public  policy  or U.S.  or  Canadian  federal,  state  or
      provincial securities laws relating thereto.

            (j) No  consent,  waiver,  approval,  authorization  or  order of or
      filing,  registration,  qualification,  license  or  permit of or with any
      court or  governmental  agency or body, or third party is required for (i)
      the  issuance  and  sale  by the  Issuers  of  the  Notes  to the  Initial
      Purchasers  or the  consummation  by the  Issuers  of  each  of the  other
      transactions  contemplated  hereby  or  by  any  of  the  other  Operative
      Documents,  (ii) the issuance and sale by the Subsidiary Guarantors of the
      Guarantees or the  consummation by the Subsidiary  Guarantors of the other
      transactions  contemplated  hereby or by any of the  Operative  Documents,
      (iii) the consummation by the Issuers of the transactions  contemplated by
      the  Acquisition  Agreements,  to the extent each is a party thereto,  and
      (iv) the  execution  by the  Company  of the New Credit  Facility  and the
      consummation  by the Issuers of each of the  transactions  contemplated by
      the New Credit Facility, except, in each case, such as have been or, prior
      to the Closing  Date,  will be obtained and such as may be required  under
      state  securities or "Blue Sky" laws in  connection  with the purchase and
      resale of the Securities by the Initial Purchasers. None of the Issuers or
      any of the  Subsidiaries  is (A) in violation of its charter or bylaws (or
      similar  organizational  document),  (B) in  breach  or  violation  of any
      statute,  judgment, decree, order, rule or regulation applicable to any of
      them or any of their respective  properties or assets, except for any such
      breach or violation  which would not,  individually  or in the  aggregate,
      have a Material Adverse Effect,  or (C) in breach of or default under (nor
      has any event  occurred  which,  with  notice or  passage of time or both,
      would  constitute a default  under) or in violation of any of the terms or
      provisions of any  indenture,  mortgage,  deed of trust,  loan  agreement,
      note, lease, license, permit, certificate,  contract or other agreement or
      instrument  to which  any of them is a party  or to  which  any of them or
      their   respective   properties   or  assets  is  subject   (collectively,
      "Contracts"),  except for any such  breach,  default,  violation  or event
      which would not, individually or in the aggregate, have a Material Adverse
      Effect.

            (k) The execution,  delivery and  performance by the Issuers of this
      Agreement and each of the other Operative Documents (to the extent a party
      thereto) and the consummation of the transactions  contemplated hereby and
      thereby  (including,  without  limitation,  the  issuance  and sale of the
      Securities  to the Initial  Purchasers  and the  issuance of the  Exchange
      Notes in the  Exchange  Offer),  the  consummation  by the  Issuers of the
      Pending  Acquisitions,  to the  extent  each is a party  thereto,  and the
      execution,  delivery  and  performance  by the  Company  of the New Credit
      Facility  do not and will not  violate,  conflict  with or  constitute  or
      result in a breach of or a default  under (or  constitute  an event  which

                                     5





      with notice or passage of time or both would  constitute a default  under)
      or cause  an  acceleration  of any  obligation  under,  or  result  in the
      imposition  or creation of (or the  obligation to create or impose) a Lien
      (as  defined)  on  any  properties  or  assets  of  either  Issuer  or any
      Subsidiary  with respect to (A) the terms or  provisions  of any Contract,
      except for any such conflict,  breach,  violation,  default or event which
      would not,  individually  or in the  aggregate,  have a  Material  Adverse
      Effect, (B) the charter or bylaws (or similar organizational  document) of
      the Issuers or any of the Subsidiaries,  or (C) (assuming  compliance with
      all  applicable  state  securities  or "Blue  Sky" laws and  assuming  the
      accuracy of the  representations  and warranties of the Initial Purchasers
      in  Section  8 hereof)  any  statute,  judgment,  decree,  order,  rule or
      regulation  applicable to the Issuers or any of the Subsidiaries or any of
      their  respective  properties  or assets,  except  for any such  conflict,
      breach or violation  which would not,  individually  or in the  aggregate,
      have a Material Adverse Effect.

            (l) Ernst & Young  LLP,  Deloitte  & Touche  LLP and KPMG  Chartered
      Accountants who are reporting on the audited  financial  statements of the
      Issuers,  Enserch  Exploration,  Inc.'s  Wamsutter  Area package and CGGS,
      respectively,  included in the Final  Memorandum,  are independent  public
      accountants   within  the  meaning  of  the  Act.  The  audited  financial
      statements of the Issuers, CGGS and Enserch Exploration,  Inc.'s Wamsutter
      Area package and related  notes thereto  included in the Final  Memorandum
      present  fairly in all  material  respects the  financial  position of the
      Issuers, CGGS and Enserch Exploration, Inc.'s Wamsutter Area package as of
      the dates indicated and the results of their respective operations and the
      changes in the cash flow for the periods  specified,  in  accordance  with
      generally accepted  accounting  principles ("GAAP")  consistently  applied
      throughout such periods,  except as otherwise stated therein.  The summary
      and  selected  financial  and  statistical  data  included  in  the  Final
      Memorandum  present fairly in all material  respects the information shown
      therein and have been prepared and compiled on a basis consistent with the
      audited financial statements included therein, except as stated therein.

            (m) The pro forma financial statements (including the notes thereto)
      and the  other  pro  forma  financial  information  included  in the Final
      Memorandum  (i)  comply  as to  form in all  material  respects  with  the
      applicable requirements of Regulation S-X promulgated under the Securities
      Exchange Act of 1934,  as amended  (the  "Exchange  Act"),  (ii) have been
      prepared in all  material  respects in  accordance  with the  Commission's
      rules and guidelines with respect to pro forma financial  statements,  and
      (iii) have been  properly  computed on the bases  described  therein;  the
      assumptions  used in the  preparation of the pro forma  financial data and
      other pro forma financial information included in the Final Memorandum are
      reasonable and the adjustments used therein are appropriate to give effect
      to the transactions or circumstances referred to therein.

            (n)  There is not  pending  or,  to the  knowledge  of the  Issuers,
      threatened any action, suit, proceeding, inquiry or investigation to which
      either of the Issuers or any of the  Subsidiaries  is a party, or to which

                                     6





      the property or assets of either of the Issuers or any of the Subsidiaries
      is subject,  before or brought by any court,  arbitrator  or  governmental
      agency or body which, if determined  adversely to either of the Issuers or
      any of the Subsidiaries,  would,  individually or in the aggregate, have a
      Material  Adverse Effect or which seeks to restrain,  enjoin,  prevent the
      consummation  of or  otherwise  challenge  the  issuance  or  sale  of the
      Securities  to  be  sold  hereunder  or  the  consummation  of  the  other
      transactions described in the Final Memorandum.

            (o) Each of the Issuers and the Subsidiaries possesses all licenses,
      permits,    certificates,    consents,   orders,   approvals   and   other
      authorizations  from, and has made all  declarations and filings with, all
      federal,   state,   local  and   other   governmental   authorities,   all
      self-regulatory   organizations   and  all  courts  and  other  tribunals,
      presently  required or necessary to own or lease,  as the case may be, and
      to  operate  its  respective  properties  and to carry  on its  respective
      businesses  as now or proposed to be  conducted  as set forth in the Final
      Memorandum  ("Permits"),  except  where the failure to obtain such Permits
      would not,  individually  or in the  aggregate,  reasonably be expected to
      have a Material  Adverse Effect;  each of the Issuers and the Subsidiaries
      has fulfilled and  performed all of its  obligations  with respect to such
      Permits and no event has occurred  which allows,  or after notice or lapse
      of time would allow,  revocation or termination  thereof or results in any
      other material  impairment of the rights of the holder of any such Permit,
      except where the failure to perform such  obligations or the occurrence of
      such  event  would not have a  Material  Adverse  Effect;  and none of the
      Issuers  or  any  of the  Subsidiaries  has  received  any  notice  of any
      proceeding  relating to  revocation  or  modification  of any such Permit,
      except  as  described  in the  Final  Memorandum  and  except  where  such
      revocation or  modification  would not,  individually or in the aggregate,
      have a Material Adverse Effect.

            (p) Since the respective  dates as to which  information is given in
      the Final Memorandum, except as described therein, (i) none of the Issuers
      or any of the  Subsidiaries  has incurred any  liabilities or obligations,
      direct  or  contingent,  or  entered  into or  agreed  to  enter  into any
      transactions or contracts  (written or oral) not in the ordinary course of
      business,  or which  liabilities,  obligations,  transactions or contracts
      would,  individually  or in the  aggregate,  be material to the  business,
      condition (financial or otherwise),  prospects or results of operations of
      the  Issuers  and the  Subsidiaries,  taken as a whole,  (ii)  none of the
      Issuers or any of the  Subsidiaries  has purchased any of its  outstanding
      capital stock (other than  repurchases by the Company of its capital stock
      in the open  market  not  exceeding  $1  million  in the  aggregate),  nor
      declared,  paid or otherwise made any dividend or distribution of any kind
      on its capital  stock  (other than with  respect to the  Company's  Series
      1995-B  Preferred  Stock  and  other  than  with  respect  to any of  such
      Subsidiary, the purchase of, or dividend or distribution on, capital stock
      owned by the  Company)  and (iii)  there shall not have been any change in
      the  capital  stock or  long-term  indebtedness  of any of the  Issuers or
      Subsidiaries.


                                     7






            (q) Each of the Issuers and the Subsidiaries has filed all necessary
      federal, state and foreign income and franchise tax returns,  except where
      the  failure to so file such  returns  would not,  individually  or in the
      aggregate, have a Material Adverse Effect, and has paid all taxes shown as
      due  thereon  except as to taxes any of the  Issuers  or  Subsidiaries  is
      contesting in good faith; and other than tax deficiencies which any of the
      Issuers or  Subsidiaries  is  contesting  in good faith and for which such
      Issuer or such  Subsidiaries has provided  adequate reserves in accordance
      with generally accepted accounting principles,  there is no tax deficiency
      that has been asserted against any of the Issuers or the Subsidiaries that
      would have, individually or in the aggregate, a Material Adverse Effect.

            (r) The  statistical and  market-related  data included in the Final
      Memorandum are based on or derived from sources which the Issuers  believe
      to be reliable and accurate.

            (s) None of the  Issuers  or any of the  Subsidiaries  or any  agent
      acting on their  behalf has taken or will take any action that might cause
      this Agreement or the sale of the Securities to violate Regulation G, T, U
      or X of the Board of Governors of the Federal Reserve System, in each case
      as in effect,  or as the same may  hereafter be in effect,  on the Closing
      Date.

            (t) Each of the Issuers and the Subsidiaries has good and defensible
      title  to all  real  property  and good  title  to all  personal  property
      described  in the  Final  Memorandum  as  being  owned  by it and good and
      defensible title to a leasehold  estate in the real and personal  property
      described in the Final  Memorandum as being leased by it free and clear of
      all liens, charges,  encumbrances or restrictions,  except as described in
      the Final  Memorandum,  liens arising under the New Credit  Facility or to
      the extent the failure to have such title or the  existence of such liens,
      charges,  encumbrances or restrictions  would not,  individually or in the
      aggregate,  have a Material  Adverse  Effect.  All leases,  contracts  and
      agreements  to which any of the Issuers or  Subsidiaries  is a party or by
      which any of them is bound are valid and  enforceable  against such Issuer
      or such  Subsidiary,  as the  case  may be,  and to the  knowledge  of the
      Issuers and the Subsidiaries  are valid and enforceable  against the other
      party or parties  thereto  and are in full force and effect with only such
      exceptions as would not, individually or in the aggregate, have a Material
      Adverse  Effect,   except  as  such   enforceability  may  be  limited  by
      bankruptcy, insolvency, reorganization,  moratorium and other similar laws
      now or hereinafter in effect  relating to or affecting  creditors'  rights
      generally,  by general  equitable  principles  (regardless of whether such
      enforceability  is  considered in a proceeding in equity or at law) or the
      discretion  of the court  before  which  any  proceeding  therefor  may be
      brought. The Issuers and the Subsidiaries own or possess adequate licenses
      or other  rights to use all  patents,  trademarks,  service  marks,  trade
      names,  copyrights and know-how necessary to conduct the businesses now or
      proposed to be operated by them as described in the Final Memorandum,  and
      none of the Issuers or any of the  Subsidiaries has received any notice of
      infringement of or conflict with (or knows of any such  infringement of or
      conflict  with)  asserted  rights of others with  respect to any  patents,

                                     8






      trademarks,  service marks, trade names,  copyrights or know-how which, if
      such assertion of infringement  or conflict were  sustained,  would have a
      Material Adverse Effect.

            (u)  There are no legal or  governmental  proceedings  involving  or
      affecting any of the Issuers or  Subsidiaries  or any of their  respective
      properties  or  assets  which  would  be  required  to be  described  in a
      prospectus  pursuant  to the Act that are not so  described  in the  Final
      Memorandum,  nor are there any material contracts or other documents which
      would be required to be described in a prospectus pursuant to the Act that
      are not so described in the Final Memorandum.

            (v) Except as  described  in the Final  Memorandum  or as would not,
      individually  or in  the  aggregate,  reasonably  be  expected  to  have a
      Material Adverse Effect (A) each of the Issuers and the Subsidiaries is in
      compliance with and not subject to any known  liability  under  applicable
      Environmental  Laws (as  defined  below),  (B) each of the Issuers and the
      Subsidiaries  has made all filings and provided all notices required under
      any applicable  Environmental Law, and has, and is in compliance with, all
      Permits required under any applicable  Environmental Laws and each of them
      is in  full  force  and  effect,  (C)  there  is  no  civil,  criminal  or
      administrative  action, suit, demand, claim, hearing,  notice of violation
      or, to the knowledge of the Issuers and the  Subsidiaries,  investigation,
      proceeding,  notice or demand letter or request for information pending or
      threatened  against  any of the  Issuers  or the  Subsidiaries  under  any
      Environmental  Law, (D) no lien,  charge,  encumbrance or restriction  has
      been  recorded  under any  Environmental  Law with  respect to any assets,
      facility or property owned,  operated,  leased or controlled by any of the
      Issuers  or  the  Subsidiaries,  (E)  none  of the  Issuers  or any of the
      Subsidiaries  has  received  notice  that  it  has  been  identified  as a
      potentially  responsible  party  under  the  Comprehensive   Environmental
      Response,  Compensation and Liability Act of 1980, as amended  ("CERCLA"),
      or any  comparable  state law,  (F) no  property or facility of any of the
      Issuers or the  Subsidiaries  is (i) listed  or, to the  knowledge  of the
      Issuers  and  the  Subsidiaries  proposed  for  listing  on  the  National
      Priorities  List  under  CERCLA  or is (ii)  listed  in the  Comprehensive
      Environmental  Response,  Compensation,  Liability Information System List
      promulgated  pursuant to CERCLA,  or on any comparable  list maintained by
      any state or local governmental authority.

            For  purposes  of this  Agreement,  "Environmental  Laws"  means the
      common  law  and  all  applicable   federal,   state  and  local  laws  or
      regulations,  codes,  orders,  decrees,  judgments or injunctions  issued,
      promulgated,  approved or entered  thereunder,  relating to  pollution  or
      protection  of public or  employee  health and safety or the  environment,
      including, without limitation, laws relating to (i) emissions, discharges,
      releases  or  threatened   releases  of  hazardous   materials   into  the
      environment  (including,  without limitation,  ambient air, surface water,
      ground water,  land surface or subsurface  strata),  (ii) the manufacture,
      processing,  distribution, use, generation,  treatment, storage, disposal,
      transport or handling of hazardous  materials,  and (iii)  underground and
      above ground storage tanks and related piping, and emissions,  discharges,

                                     9






      releases or threatened releases therefrom.

            (w) There is no strike,  labor  dispute,  slowdown or work  stoppage
      with the  employees  of any of the  Issuers or the  Subsidiaries  which is
      pending or, to the knowledge of the Issuers, threatened.

            (x)  Each of the  Issuers  and the  Subsidiaries  carries  insurance
      including self-insurance in such amounts and covering such risks as in its
      reasonable  determination  is adequate for the conduct of its business and
      the value of its properties.

            (y) None of the Issuers or any of the  Subsidiaries has incurred any
      liability  for any  prohibited  transaction  or funding  deficiency or any
      complete or partial  withdrawal  liability  with  respect to any  pension,
      profit  sharing or other plan which is subject to the Employee  Retirement
      Income  Security Act of 1974,  as amended  ("ERISA"),  to which any of the
      Issuers or the  Subsidiaries  makes or ever has made a contribution and in
      which any  employee  of any of the Issuers or the  Subsidiaries  is or has
      ever been a  participant,  which in the  aggregate  could  have a Material
      Adverse  Effect.  With respect to such plans,  each of the Issuers and the
      Subsidiaries  is  in  compliance  in  all  respects  with  all  applicable
      provisions  of ERISA,  except  where the  failure to so comply  would not,
      individually or in the aggregate, have a Material Adverse Effect.

            (z) Each of the  Issuers  and the  Subsidiaries  (i) makes and keeps
      accurate books and records and (ii) maintains internal accounting controls
      which provide  reasonable  assurance that (A) transactions are executed in
      accordance with management's authorization,  (B) transactions are recorded
      as necessary to permit  preparation  of its  financial  statements  and to
      maintain  accountability  for its  assets,  (C)  access  to its  assets is
      permitted only in accordance with  management's  authorization and (D) the
      reported accountability for its assets is compared with existing assets at
      reasonable intervals.

            (aa)  None  of the  Issuers  or any of the  Subsidiaries  will be an
      "investment  company" or  "promoter"  or  "principal  underwriter"  for an
      "investment  company," as such terms are defined in the Investment Company
      Act of 1940, as amended, and the rules and regulations thereunder.

            (bb) The Notes,  the  Guarantees,  the Indenture,  the  Registration
      Rights  Agreement  and the New Credit  Facility  conform  in all  material
      respects to the descriptions thereof contained in the Final Memorandum.

            (cc) No holder of securities of any of the Issuers or any Subsidiary
      will be entitled to have such securities registered under the registration
      statements   required  to  be  filed  by  the  Issuers   pursuant  to  the
      Registration Rights Agreement, other than as expressly permitted thereby.


                                     10






            (dd)   Immediately   after  the  consummation  of  the  transactions
      contemplated  by  the  Acquisition  Agreements,  this  Agreement  and  the
      Indenture, the fair value and present fair saleable value of the assets of
      each of the Issuers and the Subsidiaries will exceed the sum of its stated
      liabilities and identified contingent liabilities;  none of the Issuers or
      any of the Subsidiaries (each on a consolidated basis) is, nor will any of
      the Issuers or the Subsidiaries  (each on a consolidated  basis) be, after
      giving  effect  to  the  execution,   delivery  and   performance  of  the
      Acquisition  Agreements,   this  Agreement  and  the  Indenture,  and  the
      consummation of the transactions contemplated hereby and thereby, (a) left
      with unreasonably  small capital with which to carry on its business as it
      is proposed to be conducted,  (b) unable to pay its debts  (contingent  or
      otherwise) as they mature or (c) otherwise insolvent.

            (ee) None of the Issuers or any of the  Subsidiaries or any of their
      respective Affiliates (as defined in Rule 501(b) of Regulation D under the
      Act) has  directly,  or through  any agent,  (i) sold,  offered  for sale,
      solicited  offers  to buy or  otherwise  negotiated  in  respect  of,  any
      "security"  (as defined in the Act) which is or could be  integrated  with
      the sale of the Securities in a manner that would require the registration
      under the Act of the  Securities  or (ii)  engaged  in any form of general
      solicitation or general advertising (as those terms are used in Regulation
      D under the Act) in connection  with the offering of the  Securities or in
      any manner  involving a public offering within the meaning of Section 4(2)
      of the Act.

            (ff) When the Securities are delivered  pursuant to this  Agreement,
      none of the  Securities  will be of the same class  (within the meaning of
      Rule 144A under the Act) as securities of either Issuer or any  Subsidiary
      that are listed on a national securities exchange registered under Section
      6 of the  Exchange  Act or that are  quoted in a United  States  automated
      inter-dealer quotation system.

            (gg) All legal or governmental  proceedings,  contracts or documents
      of a character  required to be  described in a  registration  statement on
      Form S-1 or to be filed as an exhibit to a registration  statement on Form
      S-1 have been so  described;  and any such  descriptions  are complete and
      accurate in all material respects.

            (hh) None of the Issuers, the Subsidiaries,  any of their respective
      Affiliates  (as defined in Rule 501(b) of  Regulation  D under the Act) or
      any  person  acting  on  any of  their  behalf  (other  than  the  Initial
      Purchasers)  has engaged in any directed  selling efforts (as that term is
      defined in  Regulation S under the Act  ("Regulation  S")) with respect to
      the Securities; the Issuers and their respective Affiliates and any person
      acting on any of their  behalf  (other than the Initial  Purchasers)  have
      complied with the offering restrictions requirement of Regulation S.

            (ii) Subsequent to the respective  dates as of which  information is
      given in the Final  Memorandum  and up to the Closing Date,  except as set
      forth in the Final  Memorandum,  neither of the Issuers has  incurred  any
      liabilities or  obligations,  direct or contingent,  which are material to
      the Issuers taken as a whole,  nor entered into any transaction not in the
      ordinary course of business and there has not been, individually or in the

                                   11






      aggregate,  any material  adverse  change,  or any  development  which may
      reasonably  be  expected  to involve a  material  adverse  change,  in the
      properties,  business,  results of  operations,  condition  (financial  or
      otherwise),  affairs or  prospects  of the Issuers  taken as a whole other
      than any such effect caused solely by decreases in crude oil,  natural gas
      liquids  and natural  gas prices  (any such  event,  a  "Material  Adverse
      Change").

            (jj) Assuming that the representations and warranties of the Initial
      Purchasers  contained  in  Section  8 are  true  and  correct,  it is  not
      necessary  in  connection  with  the  offer,  sale  and  delivery  of  the
      Securities  to the  Initial  Purchasers  or the  reoffer and resale by the
      Initial  Purchasers  in the  manner  contemplated  by  this  Agreement  to
      register  the  Securities  under the Act or to qualify  the  Indenture  in
      respect of the Notes under the TIA.

            (kk)  Western is a  subsidiary  of the Company  with no  operations,
      assets or  liabilities  other than  $2,000,000 par value  preferred  stock
      issued to a bank. Portilla Happy Corporation, a Texas corporation, will be
      dissolved  prior to the Closing Date and will not be a  Subsidiary  of the
      Company on the Closing Date.

            Any certificate signed by any officer of either Issuer and delivered
to any Initial  Purchaser or to counsel for the Initial  Purchasers or either of
the Issuers shall be deemed a joint and several  representation  and warranty by
the Issuers to each Initial Purchaser as to the matters covered thereby.

            3. Purchase,  Sale and Delivery of the  Securities.  On the basis of
the representations,  warranties,  agreements and covenants herein contained and
subject to the terms and conditions herein set forth, the Issuers agree to issue
and sell to the Initial Purchasers, and the Initial Purchasers, acting severally
and not jointly, agree to purchase the Notes (and the related Guarantees) in the
respective  amounts set forth  opposite  their  respective  names on Schedule II
attached hereto at [ ]% of their principal  amount.  One or more certificates in
definitive  form for the Notes and Guarantees  that the Initial  Purchasers have
agreed to purchase  hereunder,  and in such  denomination or  denominations  and
registered in such name or names as the Initial  Purchasers  request upon notice
to the Issuers at least 36 hours prior to the Closing  Date,  shall be delivered
by or on behalf of the Issuers to the Initial Purchasers,  against payment by or
on behalf of the  Initial  Purchasers  of the  purchase  price  therefor by wire
transfer  (same day funds) to such  account or  accounts  as the  Issuers  shall
specify prior to the Closing Date, or by such means as the parties  hereto shall
agree prior to the Closing Date. Such delivery of and payment for the Securities
shall be made at the offices of Cahill  Gordon & Reindel,  80 Pine  Street,  New
York,  New York at 10:00 A.M.,  New York time,  on November 14, 1996, or at such
other place,  time or date as the Initial  Purchasers,  on the one hand, and the
Issuers,  on the other  hand,  may agree  upon,  such time and date of  delivery
against payment being herein referred to as the "Closing Date." The Issuers will
make such certificate or certificates for the Securities  available for checking
and  packaging  by the  Initial  Purchasers  at  the  offices  of BT  Securities
Corporation  in New York,  New York,  or at such  other  place as BT  Securities
Corporation may designate, at least 24 hours prior to the Closing Date.

                                     12






            4.  Offering  by the  Initial  Purchasers.  The  Initial  Purchasers
propose to make an  offering of the  Securities  at the price and upon the terms
set forth in the Final  Memorandum,  as soon as practicable after this Agreement
is entered into and as in the judgment of the Initial Purchasers is advisable.

            5.  Covenants of the Issuers.  The Issuers,  jointly and  severally,
covenant and agree with each of the Initial Purchasers that:

            (a) The Issuers will not amend or supplement the Final Memorandum or
      any amendment or supplement  thereto of which the Initial Purchasers shall
      not  previously  have been  advised and  furnished a copy for a reasonable
      period of time prior to the  proposed  amendment or  supplement  and as to
      which the Initial  Purchasers  shall not have given their  consent,  which
      consent shall not  unreasonably  be withheld.  The Issuers will  promptly,
      upon the reasonable  request of the Initial  Purchasers or counsel for the
      Initial Purchasers,  make any amendments or supplements to the Preliminary
      Memorandum or the Final  Memorandum  that may be necessary or advisable in
      connection with the resale of the Securities by the Initial Purchasers.

            (b) The  Issuers  will  cooperate  with the  Initial  Purchasers  in
      arranging for the  qualification  of the  Securities for offering and sale
      under  the  securities  or "Blue  Sky" laws of such  jurisdictions  as the
      Initial Purchasers may designate and will continue such  qualifications in
      effect  for as long as may be  necessary  to  complete  the  resale of the
      Securities;  provided,  however, that in connection therewith,  neither of
      the Issuers  shall be required to qualify as a foreign  corporation  or to
      execute a general  consent to service  of process in any  jurisdiction  or
      subject  itself to  taxation in excess of a nominal  dollar  amount in any
      such jurisdiction where it is not then so subject.

            (c) If,  at any time  prior to the  initial  resale  by the  Initial
      Purchasers of the  Securities or the Exchange  Notes,  any event occurs or
      information  becomes  known as a result of which the Final  Memorandum  as
      then  amended or  supplemented  would  include any untrue  statement  of a
      material  fact,  or omit to state a material  fact  necessary  to make the
      statements  therein,  in the light of the  circumstances  under which they
      were made, not  misleading,  or if for any other reason it is necessary at
      any time to amend or  supplement  the  Final  Memorandum  to  comply  with
      applicable  law, the Issuers will promptly  notify the Initial  Purchasers
      thereof and will prepare,  at the expense of the Issuers,  an amendment or
      supplement  to the  Final  Memorandum  that  corrects  such  statement  or
      omission or effects such compliance.

            (d)  The  Issuers  will,  without  charge,  provide  to the  Initial
      Purchasers and to counsel for the Initial Purchasers as many copies of the
      Preliminary  Memorandum  and the  Final  Memorandum  or any  amendment  or
      supplement thereto as the Initial Purchasers may reasonably request.

            (e) The  Issuers  will apply the net  proceeds  from the sale of the
      Securities as set forth under "Use of Proceeds" in the Final Memorandum.

                                    13







            (f) For so long as any of the  Securities  remain  outstanding,  the
      Issuers will furnish to the Initial  Purchasers  copies of all reports and
      other communications  (financial or otherwise) furnished by the Issuers to
      the  Trustee or to the  holders of the Notes  and,  as soon as  available,
      copies of any reports or financial statements furnished to or filed by the
      Issuers with the Commission or any national  securities  exchange on which
      any class of securities of the Company may be listed.

            (g) Prior to the  Closing  Date,  the  Company  will  furnish to the
      Initial Purchasers,  as soon as they have been prepared, if at all, a copy
      of any available unaudited  consolidated  interim financial  statements of
      the Company and any available  unaudited  interim  consolidated  financial
      statements of CGGS for any period  subsequent to the period covered by the
      most recent  financial  statements  of the Company and CGGS  respectively,
      appearing in the Final Memorandum.

            (h) None of the Issuers or any of their  Affiliates will sell, offer
      for sale or solicit offers to buy or otherwise negotiate in respect of any
      "security" (as defined in the Act) which could be integrated with the sale
      of the Securities in a manner which would require the  registration  under
      the Act of the Securities.

            (i)  The  Issuers   will  not,  and  will  not  permit  any  of  the
      Subsidiaries  to,  engage in any form of general  solicitation  or general
      advertising  (as those  terms are used in  Regulation  D under the Act) in
      connection with the offering of the Securities or in any manner  involving
      a public offering within the meaning of Section 4(2) of the Act.

            (j) For so long as any of the  Securities  remain  outstanding,  the
      Company will make available at its expense, upon request, to any holder of
      such Securities and any prospective  purchasers  thereof,  the information
      specified  in Rule  144A(d)(4)  under the Act,  unless the Company is then
      subject to Section 13 or 15(d) of the Exchange Act.

            (k) The  Issuers  will use their  best  efforts  to (i)  permit  the
      Securities to be designated for trading in the Private Offerings,  Resales
      and Trading through Automated Linkages market (the "PORTAL Market") of the
      NASD and (ii) permit the  Securities  to be  eligible  for  clearance  and
      settlement through The Depository Trust Company.

            (l) In connection with  Securities  offered and sold in an off-shore
      transaction (as defined in Regulation S) the Issuers will not register any
      transfer  of such  Notes not made in  accordance  with the  provisions  of
      Regulation S and will not,  except in  accordance  with the  provisions of
      Regulation  S,  if  applicable,  issue  any  such  Notes  in the  form  of
      definitive securities.

            6. Expenses.  The Issuers agree,  jointly and severally,  to pay all
      costs  and  expenses  incident  to the  performance  of  their  respective

                                     14






      obligations  under  this  Agreement,   whether  or  not  the  transactions
      contemplated  herein  are  consummated  or this  Agreement  is  terminated
      pursuant to Section 10 hereof,  including all costs and expenses  incident
      to (i) the printing, word processing or other production of documents with
      respect to the transactions  contemplated  hereby,  including any costs of
      printing  the  Preliminary  Memorandum  and the Final  Memorandum  and any
      amendment or supplement  thereto,  and any "Blue Sky" memoranda,  (ii) all
      arrangements  relating to the delivery to the Initial Purchasers of copies
      of the  foregoing  documents,  (iii)  the  fees and  disbursements  of the
      counsel, the accountants and any other experts or advisors retained by the
      Issuers, (iv) preparation  (including printing),  issuance and delivery to
      the Initial  Purchasers of the Securities,  (v) the  qualification  of the
      Securities  under state  securities and "Blue Sky" laws,  including filing
      fees and  reasonable  fees and  disbursements  of counsel  for the Initial
      Purchasers relating thereto, (vi) expenses in connection with any meetings
      with prospective  investors in the Securities,  (vii) fees and expenses of
      the Trustee including reasonable fees and expenses of its counsel,  (viii)
      all expenses and listing fees incurred in connection  with the application
      for  quotation  of the  Securities  on the  PORTAL  Market,  (ix) any fees
      charged by investment rating agencies for the rating of the Securities and
      (x)  all  reasonable  out-of-pocket  expenses  of the  Initial  Purchasers
      (including fees and expenses of Cahill Gordon & Reindel, as counsel to the
      Initial Purchasers).  If the sale of the Securities provided for herein is
      not  consummated  because any condition to the  obligations of the Initial
      Purchasers  set forth in Section 7 hereof is not  satisfied,  because this
      Agreement is terminated or because of any failure, refusal or inability on
      the part of the  Issuers  to  perform  all  obligations  and  satisfy  all
      conditions  on their part to be performed or  satisfied  hereunder  (other
      than  solely by reason of a default  by the  Initial  Purchasers  of their
      obligations  hereunder after all conditions  hereunder have been satisfied
      in accordance  herewith),  the Issuers agree,  jointly and  severally,  to
      promptly   reimburse   the   Initial   Purchasers   upon  demand  for  all
      out-of-pocket  expenses  (including  reasonable  fees,  disbursements  and
      charges of Cahill  Gordon & Reindel,  counsel for the Initial  Purchasers)
      that shall have been incurred by the Initial Purchasers in connection with
      the proposed purchase and sale of the Securities.

            7. Conditions of the Initial Purchasers' Obligations. The obligation
      of the Initial Purchasers to purchase and pay for the Securities shall, in
      their sole  discretion,  be subject to the  satisfaction  or waiver of the
      following conditions on or prior to the Closing Date:

            (a) On the Closing Date, the Initial  Purchasers shall have received
      the  opinion,  dated as of the Closing  Date and  addressed to the Initial
      Purchasers,  of Cox & Smith  Incorporated,  United States  counsel for the
      Issuers,  in form and  substance  satisfactory  to counsel for the Initial
      Purchasers, to the effect that:

                  (i) The Company is duly incorporated,  validly existing and in
            good standing under the laws of its  jurisdiction  of  incorporation
            and has all  requisite  corporate  power  and  authority  to own its
            properties  and to conduct its  business as  described  in the Final
            Memorandum.  The  Company  is duly  qualified  to do  business  as a

                                     15





            foreign  corporation in good standing in each jurisdiction where the
            ownership  or  leasing  of  its  properties  or the  conduct  of its
            business requires such qualification, except where the failure to be
            so qualified  would not,  individually  or in the aggregate,  have a
            Material Adverse Effect.

                  (ii) As of June 30,  1996,  the  Company  had the  authorized,
            issued  and  outstanding  capitalization  set  forth  in  the  Final
            Memorandum;  all of the  outstanding  shares of capital stock of the
            Issuers and each of the  Subsidiaries  have been duly authorized and
            validly issued,  are fully paid and nonassessable  and, with respect
            to the  Company and  Western,  were not issued in  violation  of any
            preemptive  or  similar  rights;  all of the  outstanding  shares of
            capital  stock  of  Canadian  Abraxas  and  Western  will be  owned,
            directly  or  indirectly,  by the  Company,  free  and  clear of all
            perfected  security interests and, to the knowledge of such counsel,
            free and clear of all other liens, encumbrances, equities and claims
            or restrictions on transferability  (other than those imposed by the
            Act and the securities or "Blue Sky" laws of certain  jurisdictions)
            or voting.

                 (iii) To the knowledge of such counsel,  except as set forth in
            the Final  Memorandum  (A) no options,  warrants or other  rights to
            purchase  from either  Issuer or any of the  Subsidiaries  shares of
            capital stock or ownership  interests in either Issuer or any of the
            Subsidiaries  were  outstanding as of June 30, 1996 other than stock
            options  granted  to  employees,  officers  and  directors,  (B)  no
            agreements  or  other  obligations  to  issue,  or other  rights  to
            convert, any obligation into, or exchange any securities for, shares
            of capital  stock or ownership  interests in either Issuer or any of
            the  Subsidiaries  were  outstanding  as of June 30, 1996 other than
            stock options  granted to employees,  officers and directors and (C)
            no holder of securities of either Issuer or any of the  Subsidiaries
            is entitled to have such securities  registered under a registration
            statement filed pursuant to the Registration Rights Agreement.

                  (iv)  The  Company  has  the  requisite  corporate  power  and
            authority to execute, deliver and perform its obligations under this
            Agreement  and  each  of  the  other  Operative   Documents  and  to
            consummate  the  transactions   contemplated   hereby  and  thereby,
            including,  without limitation, the corporate power and authority to
            issue,  sell and  deliver the  Securities  as  contemplated  by this
            Agreement.  The  Company  has  the  requisite  corporate  power  and
            authority to execute, deliver and perform its obligations under each
            Operative  Document and to consummate the transactions  contemplated
            hereby and thereby.

                   (v) This  Agreement  has been  duly and  validly  authorized,
            executed  and  delivered  by the  Company  and the  Company  has the
            requisite  corporate  power and  authority  to execute,  deliver and
            perform its  obligations  under this Agreement and to consummate the
            transactions contemplated hereby.

                                     16






                  (vi) The Indenture has been duly and validly authorized by the
            Company and, when duly executed and delivered in accordance with its
            terms  (assuming the due  execution and delivery  thereof by each of
            the parties  thereto other than the Company),  will be the valid and
            legally binding  agreement of the Company,  enforceable  against the
            Company in accordance with its terms,  except as such enforceability
            may be limited by bankruptcy, insolvency, reorganization, moratorium
            and other similar laws now or hereinafter  in effect  relating to or
            affecting   creditors'  rights   generally,   by  general  equitable
            principles  (regardless of whether such enforceability is considered
            in a proceeding in equity or at law) or the  discretion of the court
            before  which  any  proceeding  therefor  may be  brought;  and  the
            Indenture meets the requirements for qualification under the TIA.

                 (vii) The  Notes  have been  duly and  validly  authorized  for
            issuance and sale to the Initial  Purchasers by the Company pursuant
            to this Agreement and, when issued and  authenticated  in accordance
            with the  terms  of the  Indenture  and  delivered  against  payment
            therefor in accordance  with the terms  hereof,  will be the legally
            valid and binding  obligations of the Company,  enforceable  against
            the  Company in  accordance  with their  terms and  entitled  to the
            benefits  of the  Indenture,  except as such  enforceability  may be
            limited by bankruptcy,  insolvency,  reorganization,  moratorium and
            other  similar  laws now or  hereinafter  in effect  relating  to or
            affecting   creditors'  rights   generally,   by  general  equitable
            principles  (regardless of whether such enforceability is considered
            in a proceeding in equity or at law) or the  discretion of the court
            before which any proceeding therefor may be brought.

                (viii) The Exchange Notes have been duly and validly  authorized
            for issuance by the Company and,  when issued and  authenticated  in
            accordance with the terms of the Indenture,  the Registration Rights
            Agreement  and the  Exchange  Offer,  will be the legally  valid and
            binding obligations of the Company,  enforceable against the Company
            in  accordance  with their terms and entitled to the benefits of the
            Indenture,   except  as  such   enforceability  may  be  limited  by
            bankruptcy, insolvency, reorganization, moratorium and other similar
            laws  now  or  hereinafter  in  effect   relating  to  or  affecting
            creditors'  rights  generally,   by  general  equitable   principles
            (regardless  of  whether  such  enforceability  is  considered  in a
            proceeding  in  equity  or at law) or the  discretion  of the  court
            before which any proceeding therefor may be brought.

                  (ix)  The   Registration   Rights   Agreement  has  been  duly
            authorized  by the Company and,  when duly executed and delivered by
            the Company (assuming the due execution and delivery thereof by each
            of the parties thereto other than the Company),  will be the legally
            valid and binding obligation of the Company, enforceable against the
            Company in accordance with its terms,  except as such enforceability
            may be limited by bankruptcy, insolvency, reorganization, moratorium
            and other similar laws now or hereinafter  in effect  relating to or
            affecting   creditors'  rights   generally,   by  general  equitable

                                    17






            principles  (regardless of whether such enforceability is considered
            in a proceeding in equity or at law) or the  discretion of the court
            before  which any  proceeding  therefor  may be brought  and,  as to
            rights of indemnification and contribution,  by principles of public
            policy or federal or state securities laws relating thereto.

                   (x) The  statements set forth in the Final  Memorandum  under
            the captions  "Business-Regulatory  Matters," "Certain United States
            and Canadian Income Tax Considerations"  and "Certain  Anti-takeover
            Defenses,"  insofar as they address matters of United States,  Texas
            or Nevada law or legal conclusions based on United States,  Texas or
            Nevada law and subject to the limitations set forth therein, insofar
            as such statements  constitute a summary of the matters  referred to
            therein,  fairly and accurately  present the  information  disclosed
            therein in all material respects.

                  (xi)  The   Indenture,   the  Notes,   the   Guarantees,   the
            Registration Rights Agreement and the New Credit Facility conform in
            all material  respects to the descriptions  thereof contained in the
            Final Memorandum.

                 (xii) To such  counsel's  knowledge,  no legal or  governmental
            proceedings are pending or threatened to which either of the Issuers
            or any  Subsidiary  is a party or to which the property or assets of
            either  of the  Issuers  or any  Subsidiary  is  subject,  before or
            brought by any court, arbitrator or government agency or body which,
            if determined  adversely to either of the Issuers or any Subsidiary,
            would  result,  individually  or in  the  aggregate,  in a  Material
            Adverse  Effect,  or which seeks to  restrain,  enjoin,  prevent the
            consummation  of or otherwise  challenge the issuance or sale of the
            Securities  to be sold  hereunder or the  consummation  of the other
            transactions described in the Final Memorandum.

                (xiii) To such counsel's  knowledge,  none of the Issuers or any
            of the Subsidiaries is (A) in violation of its charter or bylaws (or
            similar organizational  document), (B) in breach or violation of any
            statute,  judgment,  decree, order, rule or regulation applicable to
            any of them or any of their respective  properties or assets, except
            for any such breach or violation which would not, individually or in
            the aggregate,  have a Material Adverse Effect,  or (C) in breach of
            or default under (nor has any event occurred  which,  with notice or
            passage of time or both,  would  constitute  a default  under) or in
            violation of any of the terms or provisions of any Contract,  except
            for any such  breach,  default,  violation or event which would not,
            individually or in the aggregate, have a Material Adverse Effect.

                  (xiv) The execution,  delivery and  performance by the Issuers
            of the Purchase Agreement and each of the other Operative  Documents
            (to  the  extent  a  party  thereto)  and  the  consummation  of the
            transactions  contemplated  hereby and thereby  (including,  without
            limitation,  the issuance and sale of the  Securities to the Initial

                                     18






            Purchasers  and the issuance of the  Exchange  Notes in the Exchange
            Offer), the consummation by the Issuers of the Pending  Acquisitions
            and the  execution,  delivery and  performance by the Company of the
            New Credit  Facility do not conflict with or constitute or result in
            a breach  or a  default  under  (or an event  which  with  notice or
            passage  of  time or both  would  constitute  a  default  under)  or
            violation of or cause an  acceleration  of any obligation  under, or
            result in the imposition or creation of (or the obligation to create
            or impose) a Lien on any  properties or assets of the Company or any
            Subsidiary  with  respect  to (i) the  terms  or  provisions  of any
            Contract  known to such  counsel  to which the  Company  is a party,
            except for any such conflict,  breach,  violation,  default or event
            which would not,  individually or in the aggregate,  have a Material
            Adverse Effect,  (ii) the certificate of incorporation or bylaws (or
            similar organizational  document) of the Company, or (iii) (assuming
            compliance with all applicable  state  securities or "Blue Sky" laws
            and assuming the accuracy of the  representations  and warranties of
            the Initial  Purchasers in Section 8 hereof) any statute,  judgment,
            decree,  order,  rule or  regulation  known  to such  counsel  to be
            applicable to the Company or any of its properties or assets, except
            for  any  such  conflict,  breach  or  violation  which  would  not,
            individually or in the aggregate, have a Material Adverse Effect.

                  (xv) To the  knowledge of such  counsel,  no consent,  waiver,
            approval,   authorization  or  order  of  or  filing,  registration,
            qualification,   license   or   permit  of  or  with  any  court  or
            governmental  agency or body, or third party is required for (i) the
            issuance  and  sale  by the  Issuers  of the  Notes  to the  Initial
            Purchasers  or  the   consummation  by  the  Issuers  of  the  other
            transactions  contemplated  hereby and (ii) the  consummation by the
            Issuers  of  the   transactions   contemplated  by  the  Acquisition
            Agreements,  to the  extent  each is a party  thereto  and (iii) the
            execution  by the  Company  of  the  New  Credit  Facility  and  the
            consummation by the Issuers of each of the transactions contemplated
            by the New Credit  Facility,  except such as may be  required  under
            Blue Sky laws, as to which such counsel need express no opinion, and
            those which have previously been obtained.

                 (xvi) To the knowledge of such  counsel,  there are no legal or
            governmental proceedings involving or affecting either Issuer or the
            Subsidiaries or any of their  respective  properties or assets which
            would be required to be described  in a  prospectus  pursuant to the
            Act that are not so described in the Final Memorandum, nor are there
            any material contracts or other documents which would be required to
            be  described  in a  prospectus  pursuant to the Act that are not so
            described in the Final Memorandum.

                  (xvii) None of the Issuers or any of the  Subsidiaries  is, or
            immediately  after the sale of the  Securities to be sold  hereunder
            and the  application of the proceeds from such sale (as described in
            the Final  Memorandum  under the caption "Use of Proceeds") will be,
            an  "investment  company" as such term is defined in the  Investment

                                     19






            Company Act of 1940, as amended.

               (xviii)  No  registration  under  the  Act of the  Securities  is
            required  in  connection  with  the  sale of the  Securities  to the
            Initial  Purchasers as  contemplated by this Agreement and the Final
            Memorandum  or  in  connection   with  the  initial  resale  of  the
            Securities by the Initial Purchasers in accordance with Section 8 of
            this Agreement,  and prior to the commencement of the Exchange Offer
            or  the  effectiveness  of the  Shelf  Registration  Statement,  the
            Indenture  is not  required to be  qualified  under the TIA, in each
            case assuming (i) that the purchasers who buy such Securities in the
            initial resale thereof are qualified institutional buyers as defined
            in Rule  144A  promulgated  under  the Act  ("QIBs")  or  accredited
            investors as defined in Rule 501(a) (1), (2), (3) or (7) promulgated
            under the Act  ("Accredited  Investors"),  (ii) the  accuracy of the
            Initial  Purchasers'  representations  in Section 8 and those of the
            Issuers  contained  in this  Agreement  regarding  the  absence of a
            general  solicitation in connection with the sale of such Securities
            to the Initial  Purchasers  and the initial resale thereof and (iii)
            the due performance by the Initial  Purchasers of the agreements set
            forth in Section 8 hereof.

                 (xix) Neither the consummation of the transactions contemplated
            by this Agreement nor the sale,  issuance,  execution or delivery of
            the Securities will violate  Regulation G, T, U or X of the Board of
            Governors of the Federal Reserve System.

            At the  time  the  foregoing  opinion  is  delivered,  Cox &  Smith,
Incorporated  shall  additionally  state that it has participated in conferences
with officers and other  representatives of the Issuers,  representatives of the
independent  public  accountants  for the Issuers,  representatives  of Canadian
counsel for the Issuers,  representatives  of the Initial Purchasers and counsel
for the  Initial  Purchasers,  at which  conferences  the  contents of the Final
Memorandum  and  related  matters  were  discussed,  and,  although  it has  not
independently verified and is not passing upon and assumes no responsibility for
the accuracy,  completeness or fairness of the statements contained in the Final
Memorandum  (except to the extent  specified in subsections (x) and (xi) of this
Section 7(a)), no facts have come to its attention which lead it to believe that
the Final Memorandum,  on the date thereof or at the Closing Date,  contained an
untrue statement of a material fact or omitted to state a material fact required
to be stated therein or necessary to make the statements  contained therein,  in
light of the circumstances  under which they were made, not misleading (it being
understood  that such firm need express no opinion with respect to the financial
statements  and  related  notes  thereto and the other  financial,  engineering,
statistical and accounting data included in the Final Memorandum).

            In rendering the foregoing  opinions,  Cox & Smith  Incorporated may
(i) rely, to the extent such counsel deems proper,  upon the representations and
certifications  of officers of the Issuers or of public  officials and (ii) rely
as to matters  involving the application of laws of any jurisdiction  other than
the  federal  laws of the United  States of America and the laws of the State of

                                     20






Texas and the corporation law of the State of Nevada, to the extent such counsel
deems proper and  specifies in such  opinion,  upon the opinion of other counsel
who are reasonably satisfactory to counsel for the Initial Purchasers; provided,
however, that Cox & Smith Incorporated shall state that it believes that it, the
Initial  Purchasers  and counsel for the Initial  Purchasers  are  justified  in
relying on such opinion.

            References  to the Final  Memorandum  in this  subsection  (a) shall
      include any amendment or supplement  thereto  prepared in accordance  with
      the provisions of this Agreement at the Closing Date.

            (b) On the Closing Date, the Initial  Purchasers shall have received
      the  opinion,  dated as of the Closing  Date and  addressed to the Initial
      Purchasers,  of Burnet,  Duckworth & Palmer,  Barristers  and  Solicitors,
      Canadian  Counsel for the Issuers,  in form and substance  satisfactory to
      counsel for the Initial Purchasers, to the effect that:

                   (i) Each of Canadian  Abraxas,  Cascade and Grey Wolf is duly
            incorporated,  validly  existing and in good standing under the laws
            of  its  respective   jurisdiction  of  incorporation  and  has  all
            requisite corporate power and authority to own its properties and to
            conduct its business as described in the Final  Memorandum.  Each of
            Canadian  Abraxas,  Cascade and Grey Wolf is duly qualified to carry
            on business  in the  Province  of  Alberta,  Canada,  being the only
            jurisdiction in which such entities do business.

            (ii) All of the  outstanding  shares of  capital  stock of  Canadian
            Abraxas,  Grey Wolf and Cascade  have been duly and validly  issued,
            are  fully  paid  and  non-assessable  and in  respect  of  Canadian
            Abraxas,  to the knowledge of counsel,  were not issued in violation
            of any preemptive or similar  rights.  The Company is the registered
            owner of all of the outstanding  shares of capital stock of Canadian
            Abraxas and the Company is the registered  owner of that  percentage
            of  outstanding  shares of the capital  stock of Grey Wolf as is set
            forth in the Final  Memorandum and Grey Wolf is the registered owner
            of the  capital  stock  of  Cascade  as is  reflected  in the  Final
            Memorandum in the indirect  ownership of the Company in Cascade;  in
            each such case, free and clear of all perfected  security  interests
            registered in the Province of Alberta against the Company, Grey Wolf
            and Cascade.  To the knowledge of such counsel,  except as set forth
            in the Final Memorandum (A) no options,  warrants or other rights to
            purchase  from  Canadian  Abraxas,  Grey Wolf or  Cascade  shares of
            capital stock or ownership interests in Canadian Abraxas,  Grey Wolf
            or Cascade are outstanding, other than as are disclosed in the Final
            Memorandum  and  other  than  stock  options  issued  to  employees,
            officers and  directors,  (B) no agreements or other  obligations to
            issue, or other rights to convert,  any obligation into, or exchange
            any securities for,  shares of capital stock or ownership  interests
            in Canadian Abraxas Grey Wolf or Cascade are outstanding  other than
            stock options issued to employees, officers and directors and (C) no
            holder of  securities of Canadian  Abraxas,  Grey Wolf or Cascade is

                                    21






            entitled to have such  securities  registered  under a  registration
            statement filed pursuant to the Registration Rights Agreement.

                 (iii) Each of Canadian  Abraxas,  Grey Wolf and Cascade has all
            requisite  corporate  power and  authority  to execute,  deliver and
            perform its  respective  obligations  under this  Agreement  and the
            other  Operative  Documents to which it is a party and to consummate
            the transactions contemplated hereby and thereby, including, without
            limitation,  in respect of Canadian  Abraxas the corporate power and
            authority to issue,  sell and deliver the Securities as contemplated
            by this Agreement.

                  (iv)  This  Agreement  has been duly and  validly  authorized,
            executed and delivered by Canadian Abraxas.

                   (v) The  Indenture  has been duly and validly  authorized  by
            Canadian Abraxas and, when duly executed and delivered in accordance
            with its terms  (assuming the due execution and delivery  thereof by
            the other parties  thereto),  will be the valid and legally  binding
            agreement of Canadian Abraxas,  enforceable against it in accordance
            with its  terms,  except as such  enforceability  may be  limited by
            bankruptcy, insolvency, reorganization, moratorium and other similar
            laws  now  or  hereinafter  in  effect   relating  to  or  affecting
            creditors'  rights  generally,   by  general  equitable   principles
            (regardless  of  whether  such  enforceability  is  considered  in a
            proceeding in equity or at law).

                  (vi) The  Notes  have  been duly and  validly  authorized  for
            issuance  and sale to the Initial  Purchasers  by  Canadian  Abraxas
            pursuant to this  Agreement  and, when issued and  authenticated  in
            accordance  with the terms of the Indenture  and  delivered  against
            payment  therefor in accordance  with the terms hereof,  will be the
            legally  valid  and  binding   obligations   of  Canadian   Abraxas,
            enforceable  against Canadian Abraxas in accordance with their terms
            and  entitled  to the  benefits  of the  Indenture,  except  as such
            enforceability   may   be   limited   by   bankruptcy,   insolvency,
            reorganization, moratorium and other similar laws now or hereinafter
            in effect relating to or affecting  creditors' rights generally,  by
            general   equitable   principles   (regardless   of   whether   such
            enforceability is considered in a proceeding in equity or at law).

                  (vii) The Exchange Notes have been duly and validly authorized
            for issuance by Canadian Abraxas and, when issued and  authenticated
            in  accordance  with the terms of the  Indenture,  the  Registration
            Rights  Agreement and the Exchange Offer,  will be the legally valid
            and binding  obligations of Canadian  Abraxas,  enforceable  against
            Canadian  Abraxas in accordance with their terms and entitled to the
            benefits  of the  Indenture,  except as such  enforceability  may be
            limited by bankruptcy,  insolvency,  reorganization,  moratorium and

                                     22






            other  similar  laws now or  hereinafter  in effect  relating  to or
            affecting   creditors'  rights   generally,   by  general  equitable
            principles  (regardless of whether such enforceability is considered
            in a proceeding in equity or at law).

                (viii)  The   Registration   Rights   Agreement  has  been  duly
            authorized by Canadian Abraxas and, when duly executed and delivered
            by Canadian Abraxas (assuming the due execution and delivery thereof
            by the other parties thereto), will be the legally valid and binding
            obligation of Canadian Abraxas, enforceable against it in accordance
            with its  terms,  except as such  enforceability  may be  limited by
            bankruptcy, insolvency, reorganization, moratorium and other similar
            laws  now  or  hereinafter  in  effect   relating  to  or  affecting
            creditors'  rights  generally,   by  general  equitable   principles
            (regardless  of  whether  such  enforceability  is  considered  in a
            proceeding   in   equity   or  at  law)   and,   as  to   rights  of
            indemnification,  contribution  and waiver,  by principles of public
            policy or federal or provincial securities laws relating thereto.

                  (ix) To such  counsel's  knowledge,  no legal or  governmental
            proceedings  are pending or threatened to which Canadian  Abraxas or
            Grey Wolf or Cascade is a party or to which the  property  or assets
            of Canadian  Abraxas or Grey Wolf or Cascade is  subject,  before or
            brought by any court, arbitrator or government agency or body which,
            if determined  adversely to Canadian Abraxas,  Grey Wolf or Cascade,
            would  result,  individually  or in  the  aggregate,  in a  Material
            Adverse  Effect,  or which seeks to  restrain,  enjoin,  prevent the
            consummation  of or otherwise  challenge the issuance or sale of the
            Securities  to be sold  hereunder or the  consummation  of the other
            transactions described in the Final Memorandum.

                   (x) To such counsel's knowledge,  none of Canadian Abraxas or
            Grey Wolf or Cascade is (A) in  violation  of its  charter or bylaws
            (or similar organizational  document), (B) in breach or violation of
            any statute,  judgment, decree, order, rule or regulation applicable
            to any of them or any of  their  respective  properties  or  assets,
            except  for  any  such   breach  or   violation   which  would  not,
            individually or in the aggregate, have a Material Adverse Effect, or
            (C) in breach of or default under (nor has any event occurred which,
            with notice or passage of time or both,  would  constitute a default
            under)  or in  violation  of any of the terms or  provisions  of any
            Contract known to such counsel, except for any such breach, default,
            violation  or  event  which  would  not,   individually  or  in  the
            aggregate, have a Material Adverse Effect.

                  (xi) The  execution,  delivery  and  performance  by  Canadian
            Abraxas of the Purchase  Agreement  and each of the other  Operative
            Documents (to the extent a party  thereto) and the  consummation  of
            the transactions contemplated hereby and thereby (including, without
            limitation,  the issuance and sale of the  Securities to the Initial
            Purchasers  and the issuance of the  Exchange  Notes in the Exchange

                                     23





            Offer),   the  consummation  by  Canadian  Abraxas  of  the  Pending
            Acquisitions  to which  it is a party  do not and will not  conflict
            with or  constitute  or result in a breach or a default under (or an
            event which with notice or passage of time or both would  constitute
            a default  under) or  violation of or cause an  acceleration  of any
            obligation under, or result in the imposition or creation of (or the
            obligation  to create or impose) a Lien on any  properties or assets
            of Canadian  Abraxas,  Grey Wolf or Cascade  with respect to (i) the
            terms or  provisions of any Contract  known to such counsel,  except
            for any such  conflict,  breach,  violation,  default or event which
            would not, individually or in the aggregate, have a Material Adverse
            Effect,  (ii) the certificate of incorporation or bylaws (or similar
            organizational  document) of Canadian Abraxas, Grey Wolf or Cascade,
            or  (iii)  (assuming  the  accuracy  of  the   representations   and
            warranties  of the  Initial  Purchasers  in  Section 8  hereof)  any
            statute,  judgment,  decree, order, rule or regulation known to such
            counsel to be applicable to Canadian Abraxas or Grey Wolf or Cascade
            or any of their respective properties or assets, except for any such
            conflict,  breach or violation  which would not,  individually or in
            the aggregate, have a Material Adverse Effect.

                 (xii) To the  knowledge  of such  counsel no  consent,  waiver,
            approval,   authorization  or  order  of  or  filing,  registration,
            qualification,   license   or   permit  of  or  with  any  court  or
            governmental  agency or body, or third party is required for (i) the
            issuance  and sale by  Canadian  Abraxas of the Notes to the Initial
            Purchasers  or the  consummation  by  Canadian  Abraxas of the other
            transactions  contemplated  hereby  and  (ii)  the  consummation  by
            Canadian Abraxas of the transactions contemplated by the Acquisition
            Agreements  under  the  laws of  Alberta  except  those  which  have
            previously been obtained or made.

                (xiii) The  statements set forth in the final  Memorandum  under
            the  captions  "Business-Regulatory  Matters"  and  "Certain  United
            States  and  Canadian  Income Tax  Considerations,"  insofar as they
            address  matters  of  Alberta  law or the laws of Canada  applicable
            therein and subject to the limitations set forth therein, insofar as
            such  statements  constitute  a summary of the  matters  referred to
            therein,  fairly and accurately  present the  information  disclosed
            therein in all material respects.

                 (xiv) The laws of the  Province of Alberta,  Canada,  permit an
            action to be brought  in a court of  competent  jurisdiction  on any
            final and conclusive  judgment in persona for a sum certain in money
            of a court of the State of New York in favor of persons of a foreign
            jurisdiction, which is not impeachable as void or voidable under the
            internal  laws  of such  foreign  jurisdiction,  for a sum  certain,
            without  reexamination  or relitigation  of the matters  adjudicated
            upon if:

                        a) the Court  rendering such judgment had  jurisdiction,
                  in  accordance  with Alberta  conflict of law rules,  over the

                                    24





                  judgment  debtor (and  submission  by Canadian  Abraxas to the
                  jurisdiction  of the New York Court  pursuant to the Operative
                  Documents will suffice for this purpose).

                        b) such  judgment  was not  obtained  by  fraud  or in a
                  manner contrary to natural justice and the enforcement thereof
                  would  not be  contrary  to  public  policy,  as such  term is
                  understood  under the laws of Alberta and the federal  laws of
                  Canada applicable therein;

                        c) the enforcement of such judgment does not constitute,
                  directly or indirectly,  the enforcement of foreign  revenues,
                  expropriation, penal or public laws;

                        d) no new admissible  evidence relevant to the action is
                  discovered  prior to the  rendering of judgment by the Alberta
                  Court; and

                        e) the  action to enforce  such  judgment  is  commenced
                  within 10 years after the date of such judgment.

                  (xv) In the  event  that any of the  Operative  Documents  are
            sought to be enforced in any action or proceeding in the Province of
            Alberta,  Canada,  in  accordance  with the laws of the State of New
            York, the courts of the Province of Alberta, Canada, would recognize
            the choice of laws and would apply the laws of the State of New York
            in any such action or proceeding,  upon  appropriate  evidence as to
            such laws being  adduced,  provided  that none of the  provisions of
            such agreements or  instruments,  as the case may be, or of the laws
            of the State of New York are contrary to public policy, as such term
            is understood under the law of the Province of Alberta,  Canada and,
            an  Alberta  court  will not apply  those  laws of New York which it
            characterizes as being of a revenue, expropriatory,  penal or public
            law nature and in matters of procedure,  the laws of Alberta will be
            applied.

            At the time the foregoing opinion is delivered,  Burnet, Duckworth &
      Palmer,  Barristers and Solicitors shall  additionally state that although
      it has not  independently  verified and is not passing upon and assumes no
      responsibility   for  the  accuracy,   completeness  or  fairness  of  the
      statements  contained  in the  Final  Memorandum  (except  to  the  extent
      specified in subsection  (xiv),  no facts have come to its attention which
      lead it to believe  that the Final  Memorandum,  on the date thereof or at
      the Closing  Date,  contained an untrue  statement  of a material  fact or
      omitted  to  state a  material  fact  required  to be  stated  therein  or
      necessary  to make  the  statements  contained  therein,  in  light of the
      circumstances  under  which  they  were  made,  not  misleading  (it being
      understood  that such firm need  express  no opinion  with  respect to the
      financial  statements  and related notes thereto and the other  financial,
      statistical and accounting data included in the Final Memorandum).

                                     25






            In rendering the  foregoing  opinions,  Burnet,  Duckworth & Palmer,
      Barristers  and  Solicitors  may rely,  to the extent such  counsel  deems
      proper,  upon the  representations  and  certifications of officers of the
      Issuers or of public  officials  and shall not be required to opine on the
      effect of any  statutes or laws of the United  States and may restrict its
      opinion  to the laws of the  Province  of  Alberta  and the laws of Canada
      applicable therein.

            References  to the Final  Memorandum  in this  subsection  (a) shall
      include any amendment or supplement  thereto  prepared in accordance  with
      the provisions of this Agreement at the Closing Date.

            (c) On the Closing Date, the Initial  Purchasers shall have received
      the opinion, in form and substance satisfactory to the Initial Purchasers,
      dated as of the Closing Date and addressed to the Initial  Purchasers,  of
      Cahill Gordon & Reindel, counsel for the Initial Purchasers,  with respect
      to certain legal matters relating to this Agreement and such other related
      matters as the Initial  Purchasers  may reasonably  require.  In rendering
      such  opinion,  Cahill  Gordon & Reindel  shall have received and may rely
      upon such  certificates  and other  documents  and  information  as it may
      reasonably request to pass upon such matters.

            (d) The Initial  Purchasers shall have received from each of Ernst &
      Young LLP, Deloitte & Touche LLP and KPMG Chartered  Accountants a comfort
      letter or letters  dated the date hereof and the Closing Date, in form and
      substance satisfactory to counsel for the Initial Purchasers.

            (e) The  representations  and warranties of the Issuers contained in
      this Agreement  shall be true and correct in all material  respects on and
      as of the date hereof and on and as of the Closing  Date as if made on and
      as of the Closing  Date;  the  statements  of the Issuers'  officers  made
      pursuant to any  certificate  delivered in accordance  with the provisions
      hereof shall be true and correct in all material respects on and as of the
      date  made and on and as of the  Closing  Date;  the  Issuers  shall  have
      performed  all covenants and  agreements  and satisfied all  conditions on
      their  part to be  performed  or  satisfied  hereunder  at or prior to the
      Closing Date; and, except as described in the Final Memorandum  (exclusive
      of any amendment or supplement thereto after the date hereof),  subsequent
      to the  date  of the  most  recent  financial  statements  in  such  Final
      Memorandum,  there  shall  have  been  no  event  or  development,  and no
      information  shall  have  become  known,  that,  individually  or  in  the
      aggregate,  has or would be reasonably  likely to have a Material  Adverse
      Effect.

            (f) The  sale of the  Securities  hereunder  shall  not be  enjoined
      (temporarily or permanently) on the Closing Date.

            (g) Subsequent to the date of the most recent  financial  statements
      in the Final Memorandum  (exclusive of any amendment or supplement thereto
      after the date  hereof),  none of the  Issuers or any of the  Subsidiaries
      shall have sustained any loss or interference with respect to its business
      or properties  from fire,  flood,  hurricane,  accident or other calamity,

                                     26





      whether or not covered by insurance,  or from any strike,  labor  dispute,
      slow down or work stoppage or from any legal or  governmental  proceeding,
      order  or  decree,  which  loss or  interference,  individually  or in the
      aggregate,  has or would be reasonably  likely to have a Material  Adverse
      Effect.

            (h) The Initial  Purchasers shall have received a certificate of the
      Company,  dated the Closing  Date,  signed on behalf of the Company by its
      Chairman  of the Board,  President  or any Senior Vice  President  and the
      Chief Financial Officer, to the effect that:

                   (i)  The   representations  and  warranties  of  the  Issuers
            contained  in this  Agreement  are true and correct on and as of the
            date hereof and on and as of the Closing Date,  and the Issuers have
            performed all covenants and  agreements and satisfied all conditions
            on their part to be performed or satisfied  hereunder at or prior to
            the Closing Date;

                  (ii) At the Closing  Date,  since the date hereof or since the
            date of the most recent financial statements in the Final Memorandum
            (exclusive  of any  amendment or  supplement  thereto after the date
            hereof),  no event or development  has occurred,  and no information
            has become known,  that,  individually  or in the aggregate,  has or
            would be reasonably likely to have a Material Adverse Effect; and

                  (iii)  The  sale of the  Securities  hereunder  has  not  been
            enjoined (temporarily or permanently).

            (i) On the Closing Date, the Initial  Purchasers shall have received
      the Registration Rights Agreement executed by each of the Issuers and such
      agreement  shall be in full  force and  effect at all times from and after
      the Closing Date.

            (j) The Company  shall have  delivered  to the Initial  Purchasers a
      true,  correct and complete copy of the New Credit  Facility;  the Company
      and the other  parties  thereto  shall have executed and delivered the New
      Credit  Facility and satisfied all  conditions  precedent to any borrowing
      thereunder; and the New Credit Facility shall be in full force and effect.

            (k) The Issuers  shall have  delivered  to the Initial  Purchasers a
      true, correct and complete copy of each of the Acquisition Agreements; the
      Issuers  (to the extent  each is a party  thereto)  and the other  parties
      thereto shall have executed and delivered the Acquisition Agreements;  all
      conditions precedent to the Pending Acquisitions shall have been satisfied
      or waived;  and each of the Acquisition  Agreements shall be in full force
      and effect.

            (l) On or prior to the Closing  Date,  the sale by CGGS of the Nevis
      Plant (as defined in the Memorandum) shall have been consummated.

                                     27






            (m) The  closing  in  respect  of the New  Credit  Facility  and the
      Pending Acquisitions,  including the merger of CGGS with and into Canadian
      Abraxas,  shall  occur  simultaneously  with the closing in respect of the
      purchase and sale of the Securities hereunder.

            (n) On or before  the  Closing  Date,  the  Initial  Purchasers  and
      counsel  for the  Initial  Purchasers  shall have  received  such  further
      documents,  opinions,  certificates,  letters and schedules or instruments
      relating to the business,  corporate,  legal and financial  affairs of the
      Issuers as they shall have heretofore reasonably requested.

            (o) On the Closing Date, the Initial  Purchasers shall have received
      letters,  dated  as of the  Closing  Date  and  addressed  to the  Initial
      Purchasers  of,  DeGolyer & MacNaughton  and Sproule  Associates  Limited,
      independent petroleum engineers for the Company and CGGS, respectively, in
      form and substance satisfactory to counsel for the Initial Purchasers.

            All such documents,  opinions,  certificates,  letters, schedules or
instruments delivered pursuant to this Agreement will comply with the provisions
hereof only if they are reasonably  satisfactory in all material respects to the
Initial  Purchasers  and counsel for the Initial  Purchasers.  The Issuers shall
furnish to the  Initial  Purchasers  such  conformed  copies of such  documents,
opinions, certificates, letters, schedules and instruments in such quantities as
the Initial Purchasers shall reasonably request.

            8. Offering of Securities;  Restrictions on Transfer. (a)Each of the
Initial Purchasers represents and warrants (as to itself only) that it is a QIB.
Each of the Initial  Purchasers agrees with the Issuers (as to itself only) that
(i) it has not and will not solicit offers for, or offer or sell, the Securities
by any form of general  solicitation or general  advertising (as those terms are
used in Regulation D under the Act) or in any manner involving a public offering
within the meaning of Section  4(2) of the Act; and (ii) it has and will solicit
offers for the Securities  only from, and will offer the Securities  only to (A)
in the case of offers  inside the United  States,  (x) persons  whom the Initial
Purchasers  reasonably  believe to be QIBs or, if any such  person is buying for
one or more institutional  accounts for which such person is acting as fiduciary
or agent,  only when such person has represented to the Initial  Purchasers that
each such  account  is a QIB,  to whom  notice  has been given that such sale or
delivery  is  being  made in  reliance  on Rule  144A,  and,  in each  case,  in
transactions  under  Rule  144A or (y) a limited  number of other  institutional
investors  reasonably  believed  by  the  Initial  Purchasers  to be  Accredited
Investors  that,  prior to their  purchase  of the  Securities,  deliver  to the
Initial  Purchasers a letter containing the  representations  and agreements set
forth in Annex A to the Final  Memorandum  and (B) in the case of offers outside
the United States,  to persons other than U.S.  persons  ("foreign  purchasers,"
which term shall include dealers or other professional fiduciaries in the United
States acting on a discretionary basis for foreign beneficial owners (other than
an estate or trust));  provided,  however, that, in the case of this clause (B),
in purchasing such  Securities  such persons are deemed to have  represented and
agreed as provided under the caption  "Transfer  Restrictions"  contained in the
Final Memorandum (or, if the Final  Memorandum is not in existence,  in the most

                                     28






recent Memorandum).

            (b) Each of the Initial  Purchasers  represents  and warrants (as to
itself only) with respect to offers and sales outside the United States that (i)
it has and  will  comply  with  all  applicable  laws  and  regulations  in each
jurisdiction in which it acquires,  offers,  sells or delivers Securities or has
in its possession or distributes any Memorandum or any such other  material,  in
all cases at its own expense including,  without limitation, that the Securities
have not been and will not be offered or sold to  residents  of the  Province of
Alberta,  Canada;  (ii) the Securities  have not been and will not be offered or
sold  within the United  States or to, or for the  account or benefit  of,  U.S.
persons except in accordance  with  Regulation S under the Act or pursuant to an
exemption from the  registration  requirements  of the Act; (iii) it has offered
the  Securities  and  will  offer  and sell  the  Securities  (A) as part of its
distribution  at any time and (B) otherwise until 40 days after the later of the
commencement  of the offering and the Closing Date, only in accordance with Rule
903 of Regulation S and,  accordingly,  neither it nor any persons acting on its
behalf have engaged or will engage in any directed  selling  efforts (within the
meaning of  Regulation S) with respect to the  Securities,  and any such persons
have  complied and will comply with the  offering  restrictions  requirement  of
Regulation S; and (iv) it agrees that, at or prior to  confirmation  of sales of
the  Securities,  it will  have  sent  to each  distributor,  dealer  or  person
receiving  a  selling  concession,  fee or  other  remuneration  that  purchases
Securities  from it during the  restricted  period a  confirmation  or notice to
substantially the following effect:

      "The Securities  covered hereby have not been registered  under the United
      States  Securities  Act of  1933  (the  "Securities  Act")  and may not be
      offered  and sold  within the United  States or to, or for the  account or
      benefit of, U.S. persons (i) as part of the distribution of the Securities
      at any  time or (ii)  otherwise  until  40 days  after  the  later  of the
      commencement of the offering and the closing date of the offering,  except
      in either case in accordance with Regulation S (or Rule 144A if available)
      under the Securities  Act. Terms used above have the meaning given to them
      in Regulation S."

Terms  used in this  Section  8(b) and not  defined in this  Agreement  have the
meanings given to them in Regulation S.

            (c) Each of the Initial  Purchasers  represents  and warrants (as to
itself only) that the source of funds being used by it to acquire the Securities
does not include the assets of any  "employee  benefit plan" (within the meaning
of Section 3 of ERISA) or any "plan"  (within the meaning of Section 4975 of the
Code).

            9.   Indemnification  and  Contribution.   (a)The  Issuers  and  any
Subsidiary  Guarantors  agree,  jointly and  severally,  to  indemnify  and hold
harmless the Initial  Purchasers,  their affiliates and each person, if any, who
controls  any Initial  Purchaser  within the meaning of Section 15 of the Act or
Section  20 of  the  Exchange  Act,  against  any  losses,  claims,  damages  or
liabilities to which any Initial Purchaser or such controlling person may become
subject  under the Act,  the  Exchange  Act or  otherwise,  insofar  as any such
losses, claims, damages or liabilities (or actions in respect thereof) arise out
of or are based upon:

                                     29







             (i)  any  untrue  statement  or  alleged  untrue  statement  of any
      material fact  contained in any  Memorandum or any amendment or supplement
      thereto  or  any  application  or  other  document,  or any  amendment  or
      supplement   thereto,   executed  by  an  Issuer  or  based  upon  written
      information  furnished  by  or  on  behalf  of  an  Issuer  filed  in  any
      jurisdiction  in order to qualify the  Securities  under the securities or
      "Blue  Sky" laws  thereof  or filed  with any  securities  association  or
      securities exchange (each an "Application"); or

            (ii) the omission or alleged omission to state, in any Memorandum or
      any amendment or supplement  thereto or any  Application,  a material fact
      required to be stated therein or necessary to make the statements therein,
      in the  light  of the  circumstances  under  which  they  were  made,  not
      misleading,

and will reimburse, as incurred, the Initial Purchasers, each such affiliate and
each  such  controlling  person  for any  reasonable  legal or other  reasonable
expenses incurred by the Initial Purchasers,  such affiliate or such controlling
person in connection  with  investigating,  defending  against or appearing as a
third-party witness in connection with any such loss, claim,  damage,  liability
or action;  provided,  however,  that the Issuers and the Subsidiary  Guarantors
will not be liable (i) in any such case to the extent that any such loss, claim,
damage,  or  liability  arises out of or is based upon any untrue  statement  or
alleged untrue  statement or omission or alleged omission made in any Memorandum
or any amendment or supplement  thereto or any  Application in reliance upon and
in  conformity  with  written  information  concerning  the  Initial  Purchasers
furnished to an Issuer by the Initial Purchasers specifically for use therein or
(ii) with  respect to the  Preliminary  Memorandum,  to the extent that any such
loss,  claim,  damage or liability  arises solely from the fact that the Initial
Purchasers  sold  Securities to a person to whom there was not sent or given, on
or  prior  to the  written  confirmation  of  such  sale,  a copy  of the  Final
Memorandum,  as amended and  supplemented,  if the Issuers shall have previously
furnished  copies  thereof to the Initial  Purchasers  in  accordance  with this
Agreement  and the Final  Memorandum,  as amended and  supplemented,  would have
corrected any such untrue statement or omission.  This indemnity  agreement will
be in addition to any liability that the Issuers and the  Subsidiary  Guarantors
may otherwise have to the  indemnified  parties.  The Issuers and the Subsidiary
Guarantors  shall not be liable under this Section 9 for any  settlement  of any
claim or action effected without their prior written consent, which shall not be
unreasonably withheld.

            The Initial  Purchasers shall not, without the prior written consent
of the Issuers, effect any settlement or compromise of any pending or threatened
proceeding  in respect  of which any  Issuer is or could  have been a party,  or
indemnity could have been sought hereunder by any Issuer, unless such settlement
(A)  included  an  unconditional  written  release of the  Issuers,  in form and
substance reasonably  satisfactory to the Issuers,  from all liability on claims
that are the  subject  matter of such  proceeding  and (B) does not  include any
statement as to an admission  of fault,  culpability  or failure to act by or on
behalf of any Issuer.

                                     30






            (b) The Initial  Purchasers  agree,  severally  and not jointly,  to
indemnify and hold  harmless the Issuers and the  Subsidiary  Guarantors,  their
respective  directors and their respective officers and each person, if any, who
controls an Issuer  within the meaning of Section 15 of the Act or Section 20 of
the Exchange Act against any losses,  claims, damages or liabilities to which an
Issuer or any of the  Subsidiary  Guarantors  or any such  director,  officer or
controlling  person  may  become  subject  under the Act,  the  Exchange  Act or
otherwise, insofar as such losses, claims, damages or liabilities (or actions in
respect  thereof)  arise out of or are based  upon (i) any untrue  statement  or
alleged untrue statement of any material fact contained in any Memorandum or any
amendment or supplement thereto or any Application,  or (ii) the omission or the
alleged  omission to state  therein a material fact required to be stated in any
Memorandum  or any  amendment  or  supplement  thereto  or any  Application,  or
necessary  to make the  statements  therein,  in the light of the  circumstances
under which they were made, not misleading, in each case to the extent, but only
to the  extent,  that such  untrue  statement  or alleged  untrue  statement  or
omission or alleged  omission was made in reliance upon and in  conformity  with
written information concerning such Initial Purchaser, furnished to an Issuer by
such  Initial  Purchaser  specifically  for  use  therein;  and  subject  to the
limitation set forth  immediately  preceding  this clause,  will  reimburse,  as
incurred, any reasonable legal or other expenses incurred by an Issuer or any of
the Subsidiary Guarantors or any such director, officer or controlling person in
connection with investigating or defending against or appearing as a third party
witness in connection with any such loss, claim, damage,  liability or action in
respect thereof.  This indemnity  agreement will be in addition to any liability
that the Initial Purchasers may otherwise have to the indemnified  parties.  The
Initial  Purchasers  shall not be liable under this Section 9 for any settlement
of any  claim or action  effected  without  their  consent,  which  shall not be
unreasonably withheld.

            The  Issuers  shall not,  without the prior  written  consent of the
Initial  Purchasers,  effect any  settlement  or  compromise  of any  pending or
threatened proceeding in respect of which any Initial Purchaser is or could have
been a party,  or  indemnity  could have been  sought  hereunder  by any Initial
Purchaser,  unless such settlement (A) includes an unconditional written release
of the Initial Purchasers,  in form and substance reasonably satisfactory to the
Initial Purchasers,  from all liability on claims that are the subject matter of
such  proceeding  and (B) does not include any  statement  as to an admission of
fault, culpability or failure to act by or on behalf of any Initial Purchaser.

            (c)  Promptly  after  receipt  by an  indemnified  party  under this
Section 9 of notice of the commencement of any action for which such indemnified
party is  entitled to  indemnification  under this  Section 9, such  indemnified
party will, if a claim in respect thereof is to be made against the indemnifying
party under this Section 9, notify the  indemnifying  party of the  commencement
thereof in writing;  but the  omission to so notify the  indemnifying  party (i)
will not relieve the  indemnifying  party from any liability under paragraph (a)
or (b) above unless and to the extent such failure  results in the forfeiture by
the indemnifying  party of substantial rights and defenses and (ii) will not, in
any  event,   relieve  the  indemnifying  party  from  any  obligations  to  any
indemnified  party  other  than  the  indemnification   obligation  provided  in
paragraphs  (a) and (b) above.  In case any such  action is brought  against any
indemnified  party, and it notifies the  indemnifying  party of the commencement

                                     31





thereof,  the indemnifying party will be entitled to participate therein and, to
the extent that it may wish, jointly with any other indemnifying party similarly
notified, to assume the defense thereof, with counsel reasonably satisfactory to
such indemnified party; provided, however, that if (i) the use of counsel chosen
by the indemnifying  party to represent the indemnified party would present such
counsel  with a conflict of  interest,  (ii) the  defendants  in any such action
include  both  the  indemnified  party  and  the  indemnifying   party  and  the
indemnified  party shall have been  advised by counsel  that there may be one or
more legal defenses  available to it and/or other  indemnified  parties that are
different from or additional to those  available to the  indemnifying  party, or
(iii)  the  indemnifying  party  shall  not  have  employed  counsel  reasonably
satisfactory to the indemnified  party to represent the indemnified party within
a  reasonable  time  after  receipt by the  indemnifying  party of notice of the
institution  of such action,  then, in each such case,  the  indemnifying  party
shall not have the right to direct the  defense of such action on behalf of such
indemnified  party or parties and such  indemnified  party or parties shall have
the right to select  separate  counsel to defend  such  action on behalf of such
indemnified party or parties.  After notice from the indemnifying  party to such
indemnified  party of its election so to assume the defense thereof and approval
by such  indemnified  party of counsel  appointed  to defend  such  action,  the
indemnifying  party  will not be liable to such  indemnified  party  under  this
Section  9 for any  legal or other  expenses,  other  than  reasonable  costs of
investigation,  subsequently  incurred by such  indemnified  party in connection
with the defense thereof,  unless (i) the indemnified  party shall have employed
separate  counsel in accordance  with the proviso to the  immediately  preceding
sentence (it being understood,  however, that in connection with such action the
indemnifying  party  shall  not be  liable  for the  expenses  of more  than one
separate  counsel (in  addition to local  counsel) in any one action or separate
but substantially  similar actions in the same  jurisdiction  arising out of the
same general allegations or circumstances,  designated by the Initial Purchasers
in the case of  paragraph  (a) of this  Section 9 or the  Issuers in the case of
paragraph (b) of this Section 9, representing the indemnified parties under such
paragraph  (a) or  paragraph  (b),  as the case may be, who are  parties to such
action or actions) or (ii) the indemnifying  party has authorized in writing the
employment  of  counsel  for  the  indemnified  party  at  the  expense  of  the
indemnifying  party.  After  such  notice  from the  indemnifying  party to such
indemnified  party, the indemnifying  party will not be liable for the costs and
expenses of any  settlement of such action  effected by such  indemnified  party
without the prior written consent of the indemnifying party (which consent shall
not be unreasonably  withheld),  unless such indemnified party waived in writing
its rights under this Section 9, in which case the indemnified  party may effect
such a settlement without such consent.

            (d) In circumstances in which the indemnity  agreement  provided for
in the preceding paragraphs of this Section 9 is unavailable to, or insufficient
to hold harmless, an indemnified party in respect of any losses, claims, damages
or liabilities  (or actions in respect  thereof),  each  indemnifying  party, in
order to provide for just and equitable  contribution,  shall  contribute to the
amount  paid or payable by such  indemnified  party as a result of such  losses,
claims,  damages  or  liabilities  (or  actions  in  respect  thereof)  in  such
proportion as is  appropriate to reflect (i) the relative  benefits  received by
the indemnifying  party or parties on the one hand and the indemnified  party on
the other from the offering of the Securities or (ii) if the allocation provided

                                     32






by the foregoing  clause (i) is not  permitted by applicable  law, not only such
relative  benefits  but also the  relative  fault of the  indemnifying  party or
parties  on the one hand and the  indemnified  party on the other in  connection
with the  statements  or  omissions  or alleged  statements  or  omissions  that
resulted in such losses,  claims,  damages or liabilities (or actions in respect
thereof).  The relative benefits received by the Issuers on the one hand and any
Initial  Purchaser on the other shall be deemed to be in the same  proportion as
the total proceeds from the offering (before deducting expenses) received by the
Issuers bear to the total  discounts  and  commissions  received by such Initial
Purchaser.  The relative  fault of the parties  shall be determined by reference
to,  among other  things,  whether the untrue or alleged  untrue  statement of a
material  fact or the  omission  or alleged  omission  to state a material  fact
relates to information  supplied by the Issuers on the one hand, or such Initial
Purchaser  on the other,  the parties'  relative  intent,  knowledge,  access to
information  and opportunity to correct or prevent such statement or omission or
alleged   statement  or  omission,   and  any  other  equitable   considerations
appropriate in the  circumstances.  The Issuers and the Initial Purchasers agree
that  it  would  not be  equitable  if the  amount  of  such  contribution  were
determined  by pro rata or per  capita  allocation  or by any  other  method  of
allocation that does not take into account the equitable considerations referred
to in the  first  sentence  of this  paragraph  (d).  Notwithstanding  any other
provision of this paragraph (d), no Initial Purchaser shall be obligated to make
contributions  hereunder  that in the  aggregate  exceed  the  total  discounts,
commissions and other compensation received by such Initial Purchaser under this
Agreement,  less the aggregate amount of any damages that such Initial Purchaser
has  otherwise  been  required to pay by reason of the untrue or alleged  untrue
statements or the omissions or alleged  omissions to state a material  fact, and
no person guilty of fraudulent  misrepresentation (within the meaning of Section
11(f) of the Act) shall be entitled to contribution  from any person who was not
guilty of such fraudulent misrepresentation. For purposes of this paragraph (d),
each  affiliate of an Initial  Purchaser,  each person,  if any, who controls an
Initial  Purchaser  within the meaning of Section 15 of the Act or Section 20 of
the  Exchange  Act shall have the same  rights to  contribution  as the  Initial
Purchasers,  and each director of an Issuer,  each officer of an Issuer and each
person,  if any, who controls an Issuer  within the meaning of Section 15 of the
Act  or  Section  20 of  the  Exchange  Act,  shall  have  the  same  rights  to
contribution as the Issuers.

            10. Survival  Clause.  The respective  representations,  warranties,
agreements,  covenants,  indemnities and other statements of the Issuers,  their
respective  officers and the Initial  Purchasers  set forth in this Agreement or
made by or on behalf of them  pursuant to this  Agreement  shall  remain in full
force and effect,  regardless of (i) any  investigation  made by or on behalf of
the  Issuers,  any of  their  respective  officers  or  directors,  the  Initial
Purchasers or any  controlling  person  referred to in Section 9 hereof and (ii)
delivery  of  and  payment  for  the  Securities.   The  respective  agreements,
covenants,  indemnities  and other  statements set forth in Sections 6, 9 and 15
hereof shall remain in full force and effect,  regardless of any  termination or
cancellation of this Agreement.

            11.  Termination.  (a)This  Agreement  may be terminated in the sole
discretion of the Initial Purchasers by notice to the Issuers given prior to the
Closing Date in the event that either of the Issuers shall have failed,  refused
or been unable to perform all obligations and satisfy all conditions on its part

                                    33





to be performed or satisfied hereunder at or prior thereto or, if at or prior to
the Closing Date:

             (i)  either  of the  Issuers  shall  have  sustained  any  loss  or
      interference  with  respect to its  businesses  or  properties  from fire,
      flood,  hurricane,  accident or other calamity,  whether or not covered by
      insurance,  or from any strike, labor dispute,  slow down or work stoppage
      or any legal or governmental  proceeding,  which loss or interference,  in
      the sole  judgment  of the Initial  Purchasers,  has had or has a Material
      Adverse  Effect,  or there  shall have been,  in the sole  judgment of the
      Initial Purchasers,  any event or development that, individually or in the
      aggregate,  has or could be reasonably  likely to have a Material  Adverse
      Effect  (including  without  limitation  a change in control of any of the
      Issuers  or the  Subsidiaries),  except in each case as  described  in the
      Final Memorandum (exclusive of any amendment or supplement thereto);

            (ii) trading in securities generally on the New York Stock Exchange,
      American  Stock  Exchange or the NASDAQ  National  Market  shall have been
      suspended or minimum or maximum prices shall have been  established on any
      such exchange or market;

           (iii)  a  banking moratorium shall have been declared by New York or
      United States authorities;

            (iv)  there  shall  have  been  (A) an  outbreak  or  escalation  of
      hostilities  between the United  States and any foreign  power,  or (B) an
      outbreak  or  escalation  of any  other  insurrection  or  armed  conflict
      involving  the  United  States  or any  other  national  or  international
      calamity or emergency, or (C) any material change in the financial markets
      of the United  States  which,  in the case of (A), (B) or (C) above and in
      the sole judgment of the Initial  Purchasers,  makes it  impracticable  or
      inadvisable to proceed with the offering or the delivery of the Securities
      as contemplated by the Final Memorandum; or

             (v) any  securities  of the Issuers  shall have been  downgraded or
      placed on any "watch  list" for  possible  downgrading  by any  nationally
      recognized statistical rating organization.

            (b) Termination of this Agreement  pursuant to this Section 11 shall
be without  liability  of any party to any other  party  except as  provided  in
Section 10 hereof.

            12. Information  Supplied by the Initial Purchasers.  The statements
set  forth  in the last  paragraph  on the  front  cover  page and in the  third
paragraph  and the first,  third and seventh  sentences  of the fifth  paragraph
under the heading  "Private  Placement" in the Final  Memorandum  (to the extent
such  statements  relate  to  the  Initial   Purchasers)   constitute  the  only
information  furnished by the Initial Purchasers to the Issuers for the purposes
of  Sections  2(a) and 9 hereof and the  Initial  Purchasers  confirm  that such
statements are correct as of the date hereof and as of the Closing Date.

                                     34






            13. Notices.  All communications  hereunder shall be in writing and,
if sent to the Initial Purchasers, shall be mailed or delivered to BT Securities
Corporation, 130 Liberty Street, New York, New York 10006, Attention:  Corporate
Finance Department,  with a copy to Cahill Gordon & Reindel, 80 Pine Street, New
York, New York 10005,  Attention:  Daniel J. Zubkoff;  if sent to the Issuers or
the Subsidiary  Guarantors,  if any, shall be mailed or delivered to the Issuers
at 500 North Loop 1604 East,  Suite 100,  San Antonio,  Texas 78232,  Attention:
Robert L.G.  Watson,  with a copy to Cox & Smith  Incorporated,  112 East Pecan,
Suite 1800, San Antonio, Texas 78205, Attention: Steven Jacobs.

            All such  notices  and  communications  shall be deemed to have been
duly given: when delivered by hand, if personally delivered;  five business days
after being deposited in the mail, postage prepaid,  if mailed; and one business
day after being timely delivered to a next-day air courier.

            14. Successors.  This Agreement shall inure to the benefit of and be
binding upon the Initial Purchasers,  the Issuers and the Subsidiary Guarantors,
if any, and their respective successors and legal  representatives,  and nothing
expressed or  mentioned  in this  Agreement is intended or shall be construed to
give any other person any legal or equitable right,  remedy or claim under or in
respect of this Agreement,  or any provisions herein  contained;  this Agreement
and all conditions and provisions  hereof being intended to be and being for the
sole and  exclusive  benefit  of such  persons  and for the  benefit of no other
person  except  that  (i) the  indemnities  of the  Issuers  and the  Subsidiary
Guarantors,  if any,  contained in Section 9 of this Agreement shall also be for
the benefit of any person or persons who control an Initial Purchaser within the
meaning of Section 15 of the Act or Section 20 of the  Exchange Act and (ii) the
indemnities of the Initial  Purchasers  contained in Section 9 of this Agreement
shall also be for the benefit of the directors of the Issuers and the Subsidiary
Guarantors,  if any,  their  respective  officers  and any person or persons who
control an Issuer  within the  meaning of Section 15 of the Act or Section 20 of
the Exchange Act. No purchaser of Securities from the Initial Purchasers will be
deemed a successor because of such purchase.

            15.  APPLICABLE  LAW.  THE  VALIDITY  AND   INTERPRETATION  OF  THIS
AGREEMENT,  AND THE TERMS AND  CONDITIONS  SET FORTH HEREIN SHALL BE GOVERNED BY
AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK APPLICABLE TO
CONTRACTS MADE AND TO BE PERFORMED WHOLLY THEREIN,  WITHOUT GIVING EFFECT TO ANY
PROVISIONS THEREOF RELATING TO CONFLICTS OF LAW.

            16.  Counterparts.  This  Agreement  may be  executed in two or more
counterparts,  each of  which  shall be  deemed  an  original,  but all of which
together shall constitute one and the same instrument.

            17.  Miscellaneous.  If, on the  Closing  Date,  any of the  Initial
Purchasers  shall fail or refuse to  purchase  Securities  that it has agreed to
purchase  hereunder on such date, and the aggregate  amount of Securities  which
such defaulting  Initial  Purchaser agreed but failed and refused to purchase is
not more than ten percent of the aggregate  amount of Securities to be purchased

                                     35





on such date,  the other Initial  Purchasers  shall be obligated to purchase the
Securities which such defaulting  Initial Purchaser agreed but failed or refused
to purchase on such date. If, on the Closing Date, any Initial  Purchaser  shall
fail or refuse to purchase  Securities which it agreed to purchase  hereunder on
such date and the  aggregate  amount of  Securities  with  respect to which such
default occurs is more than ten percent of the aggregate amount of Securities to
be purchased on such date and  arrangements  satisfactory  to the  nondefaulting
Initial  Purchasers and the Company for the purchase of such  Securities are not
made within 36 hours after such default,  this Agreement shall terminate without
liability on the part of any nondefaulting Initial Purchasers or of the Company,
except as  provided  in Section  10. In any such case  either the  nondefaulting
Initial  Purchaser  or the Company  shall have the right to postpone the Closing
Date,  but in no event for longer  than seven days,  in order that the  required
changes,  if  any,  in  the  Final  Memorandum  or in  any  other  documents  or
arrangements  may be effected.  Any action taken under this paragraph  shall not
relieve  any  defaulting  Initial  Purchaser  from  liability  in respect to any
default of such Initial Purchaser under this Agreement.

            18.  Agent  for  Service;  Submission  to  Jurisdiction;  Waiver  of
Immunities.  By the execution and delivery of this Agreement,  Canadian  Abraxas
(i)  acknowledges  that it has, by separate written  instrument,  designated and
appointed CT Corporation  System,  1633 Broadway,  New York, New York 10019 (and
any successor entity),  as its authorized agent upon which process may be served
in any suit or  proceeding  arising out of or relating  to this  Agreement,  the
Registration Rights Agreement,  the Securities,  the Exchange Notes, the Private
Exchange  Notes,  if any, or the Indenture that may be instituted in any Federal
or state  court in the State of New York,  The City of New York,  the Borough of
Manhattan,  or brought under Federal or state  securities laws, and acknowledges
that CT Corporation  System has accepted such  designation,  (ii) submits to the
non-exclusive  jurisdiction of any such court in any such suit or proceeding and
(iii)  agrees that  service of process  upon CT  Corporation  System and written
notice of said service to Canadian  Abraxas in accordance  with Section 13 shall
be deemed in every respect effective service of process upon Canadian Abraxas in
any such suit or proceeding. Canadian Abraxas further agrees to take any and all
action,  including the  execution  and filing of any and all such  documents and
instruments, as may be necessary to continue such designation and appointment of
CT Corporation System in full force and effect so long as any of the Securities,
the Exchange  Notes,  the Private  Exchange Notes, if any, shall be outstanding;
provided that Canadian Abraxas may, by written notice to the Initial Purchasers,
designate such additional or alternative agent for service of process under this
Section 18 that (i) maintains an office located in the Borough of Manhattan, The
City of New York in the  State of New  York;  (ii) is  either  (x)  counsel  for
Canadian  Abraxas or (y) a  corporate  service  company  which acts as agent for
service of process for other persons in the ordinary  course of its business and
(iii)  agrees to act as agent for  service of process  in  accordance  with this
Section  18.  Such  written  notice  shall  identify  the name of such agent for
service of process  and the  address of the office of such agent for  service of
process in the Borough of Manhattan, The City of New York, State of New York.

            19. Subsidiary  Guarantor a Party.  Immediately upon the designation

                                    36





of any Subsidiary of either Issuer as a Restricted Subsidiary (as defined in the
Indenture),  the Issuers shall cause such Subsidiary to become a party hereto as
a Subsidiary  Guarantor by executing and delivering to the Initial  Purchasers a
counterpart hereof.

            If the  foregoing  correctly  sets forth our  understanding,  please
indicate your  acceptance  thereof in the space provided below for that purpose,
whereupon this letter shall constitute a binding  agreement  between the Issuers
and the Initial Purchasers.

                                    Very truly yours,

                          ABRAXAS PETROLEUM CORPORATION


                                    By:
                                          Name:
                                          Title:


                                    CANADIAN ABRAXAS PETROLEUM LIMITED


                                    By:
                                          Name:
                                          Title:

The  foregoing  Agreement is hereby  confirmed and accepted as of the date first
above written.

BT SECURITIES CORPORATION


By:   __________________________
      Name:
      Title:


JEFFERIES & COMPANY INC.


By:   __________________________
      Name:
      Title:



                                     37






ING BARINGS (U.S.) SECURITIES CORPORATION


By:   __________________________
      Name:
      Title:


BANKERS TRUST INTERNATIONAL PLC


By:   __________________________
      Name:
      Title:


            Each of the  undersigned by its execution  hereof agrees to become a
party to this  Agreement  as a  Subsidiary  Guarantor as of the date first above
written:


                                    By:
                                          Name:
                                          Title:


                                     38






                                   SCHEDULE I



                 Subsidiaries of Abraxas Petroleum Corporation


Grey Wolf Exploration Ltd.
Cascade Oil & Gas Ltd.
Western Associated Energy Corporation








                                   SCHEDULE II



                                                                  Principal
                                                                  Amount of
Initial Purchaser                                                    Notes

BT Securities Corporation...................................   $ 85,250,000

Bankers Trust International PLC.............................   $ 11,500,000

Jefferies & Company Inc.....................................   $ 96,750,000

ING Barings (U.S.) Securities
  Corporation ..............................................   $ 21,500,000
                                                               ------------

     Total..................................................   $215,000,000