SHARE SALE AGREEMENT
                                  IN RESPECT OF
                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.


                                    BETWEEN:


                               THE SHAREHOLDERS OF
                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                                     - and -

                   CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                                     - and -

                          ABRAXAS PETROLEUM CORPORATION

                                     - and -

                       CANADIAN ABRAXAS PETROLEUM LIMITED




                  DATED AS OF THE 29TH DAY OF OCTOBER, 1996





                             BENNETT JONES VERCHERE
                             4500 Bankers Hall East
                              855 - 2nd Street S.W.
                                Calgary, Alberta
                                     T2P 4K7












TABLE OF CONTENTS

PAGE

ARTICLE 1 DEFINITIONS AND PRINCIPLES OF INTERPRETATION

1.1   Definitions                                                  1
1.2   Certain Rules of Interpretation                             13
1.3   Entire Agreement                                            14
1.4   Applicable Law and Jurisdiction                             14
1.5   Accounting Terms                                            14
1.6   Knowledge                                                   15
1.7   Liabilities                                                 15
1.8   Joint Rights                                                15
1.9   Schedules                                                   16

ARTICLE 2 PURCHASE AND SALE

2.1   Action by Vendors and Purchaser                             17
2.2   Adjustments to Purchase Price                               18
2.3   Closing and Post-Closing Adjustments                        19
2.4   Place and Time of Closing                                   20
2.5   Tender                                                      20
2.6   Section 116 Certificate                                     20
2.7   Deposit                                                     20
2.8   Limitation                                                  21
2.9   Representations and Warranties;
       Material Adverse Damage                                    21
2.10  [Intentionally Deleted]                                     22

ARTICLE 3 REPRESENTATIONS AND WARRANTIES OF THE VENDORS AND THE
COMPANY

3.1   Incorporation and Registration                              22
3.2   Subsidiaries                                                22
3.3   Capital                                                     22
3.4   Absence of Conflicting Agreements                           23
3.5   Financial Statements                                        23
3.6   Absence of Unusual Transactions                             24
3.7   Absence of Guarantees                                       25
3.8   Restrictive Covenants                                       25
3.9   Tax Matters                                                 25
3.10  Equipment Contracts                                         27
3.11  Real Property and Real Property Leases                      27
3.12  Title to Assets                                             27
3.13  Quiet Enjoyment                                             27
3.14  Material Contracts                                          28
3.15  Litigation                                                  28
3.16  Compliance with Terms                                       28
3.17  Title Documents and Production Sales Contracts              28
3.18  Production and Accounts Receivable                          29
3.19  Employment Matters                                          29
3.20  Employees                                                   29






3.21  Insurance                                                   29
3.22  Copies of Agreements etc.                                   30
3.23  Bank Accounts, etc.                                         30
3.24  Corporate Records and Minute Books                          30
3.25  Environmental Matters                                       30
3.26  No Production Penalties                                     31
3.27  No Excess Gas Deliveries                                    32
3.28  Prepaid Gas Obligations                                     32
3.29  Royalty Payments                                            32
3.30  Gas Balancing Agreements                                    32
3.31  Production Sale Contracts                                   32
3.32  Partnerships                                                32
3.33  Capacity                                                    32
3.34  Capital Expenditures                                        33
3.35  Engineering Report                                          33
3.36  [Intentionally Omitted]                                     33
3.37  No Business in the United States                            33
3.38  Due Authorization                                           33
3.39  Enforceability of Obligations                               33
3.40  Consents, Approvals or Authorizations                       34
3.41  Finders' Fees                                               34
3.42  Formation of the Vendors;
            Title to the Purchased Shares                         34
3.43  Due Authorization                                           35
3.44  Enforceability of Obligations                               35
3.45  Consents, Approvals or Authorizations                       35
3.46  Finders' Fees                                               35

ARTICLE 4 REPRESENTATIONS AND WARRANTIES OF ABRAXAS AND THE
PURCHASER

4.1   Incorporation                                               37
4.2   Due Authorization                                           37
4.3   Enforceability of Obligations                               37
4.4   Absence of Conflicting Agreements                           37
4.5   Consents, Approvals or Authorizations                       38
4.6   Finders' Fees                                               38
4.7   Independent Evaluation                                      38
4.8   Eligibility                                                 38
4.9   Securities Laws                                             38

ARTICLE 5 SURVIVAL

5.1   Nature and Survival                                         39
5.2   Reliance                                                    39

ARTICLE 6 PURCHASER'S CONDITIONS PRECEDENT

6.1   Truth and Accuracy of Representations
          of Company at the Closing Time                          40
6.2   Performance of Obligations                                  40
6.3   Receipt of Closing Documentation                            40
6.4   Consents, Authorizations and Registrations                  40
6.5   [Intentionally Omitted]                                     41






6.6   Agreements Terminated                                       41
6.7   Closing Opinion                                             41
6.8   Title Opinion Update                                        41
6.9   Financing                                                   41
6.10  Officers and Directors                                      41
6.11  Escrow Agreement                                            41
6.12  Sale of Excluded Assets                                     41
6.13  Termination Agreements and Transition Agreement             42
6.14  Material Adverse Damage                                     42
6.15  No Litigation                                               42
6.16  Bank Accounts                                               42
6.17  Debentures                                                  42

ARTICLE 7 VENDORS' CONDITIONS PRECEDENT

7.1   Truth and Accuracy of Representations
          of Purchaser at Closing Time                            43
7.2   Performance of Obligations                                  43
7.3   Receipt of Closing Documentation                            43
7.4   Consents, Authorizations and Registrations                  43
7.5   Closing Opinion                                             44
7.6   Release of Directors and Officers                           44
7.7   Escrow Agreement                                            44
7.8   Representations and Warranties                              44
7.9   No Litigation                                               44
7.10  Termination Agreements and Transition Agreement             44
7.11  Material Adverse Damage                                     44

ARTICLE 8 INTERIM PERIOD

8.1   Conduct of Business Prior to Closing                        45
8.2   Access for Investigation                                    48
8.3   Actions to Satisfy Closing Conditions                       49
8.4   Waiver of Conditions in Nevis Agreement                     49
8.5   Delivery of Debentures to the Representative                49

ARTICLE 9 POST-CLOSING MATTERS

9.1   Claims                                                      49
9.2   Escrow Account                                              51
9.3   Joint Venture Audits                                        52
9.4   Stub Period Returns                                         53
9.5   Change of Name                                              53
9.6   Tax and Royalty Matters                                     53
9.7   Repayment of Debentures                                     55

ARTICLE 10 CONFIDENTIALITY

10.1  Confidential Information                                    55
10.2  Obligation                                                  56
10.3  Disclosure                                                  56
10.4  Remedies                                                    56

ARTICLE 11 GENERAL






11.1  Covenant of the Vendors                                     56
11.2  Public Notices                                              57
11.3  Expenses                                                    57
11.4  Notices                                                     57
11.5  Parties in Interest                                         60
11.6  Time                                                        60
11.7  Assignment, Successors and Assigns                          60
11.8  Further Assurances                                          60
11.9  Counterparts                                                60

ARTICLE 12 TERMINATION

12.1  Termination                                                 60
12.2  Effect of Termination                                       61

ARTICLE 13 ARBITRATION

13.1  Arbitration                                                 61
SHARE SALE AGREEMENT


THIS AGREEMENT is made as of the 29th day of October, 1996

BETWEEN:

THE SHAREHOLDERS OF CGGS CANADIAN GAS GATHERING SYSTEMS INC.
(hereinafter called the "Vendors")

- - and -

CGGS CANADIAN GAS GATHERING SYSTEMS INC., a corporation  incorporated  under the
laws of Canada (hereinafter called the "Company")

- - and -

ABRAXAS PETROLEUM CORPORATION,  a corporation incorporated under the laws of the
State of Nevada  (hereinafter  called  "Abraxas") and CANADIAN ABRAXAS PETROLEUM
LIMITED, a corporation incorporated under the laws of Canada (hereinafter called
the "Purchaser")


RECITALS:

A.    The Vendors beneficially own and control all of the
Purchased Shares and the Option.

B. The Vendors desire to sell, and the Purchaser desires to purchase, all of the
Purchased  Shares and the Parties  desire to terminate the Option,  all upon and
subject to the terms and conditions set forth in this Agreement.

      NOW THEREFORE, in consideration of premises and covenants






herein set forth, the receipt and sufficiency of which is hereby acknowledged by
the Parties, the Parties agree as follows:


ARTICLE 1
DEFINITIONS AND PRINCIPLES OF INTERPRETATION

1.1   Definitions

Whenever used in this Agreement,  unless there is something  inconsistent in the
subject matter or context, the following words and terms shall have the meanings
set out below:

"Abraxas" means Abraxas Petroleum Corporation, a corporation
incorporated under the laws of the State of Nevada;

"Accounting Firm" shall have the meaning ascribed thereto in
Section 2.3(c);

      "Act" means the Income Tax Act (Canada) as amended;

"Adjustments" has the meaning ascribed thereto in Section 2.3(a);

"AEUB  Approval"  means an order of the Alberta Energy and Utilities  Board that
section 99 of the Public  Utilities  Board Act  (Alberta)  does not apply to the
transactions contemplated herein;

"Affiliate"  has the meaning given in the Business Corporations
Act (Alberta), as amended from time to time;

"Agreement"  means this Share Sale Agreement,  including all schedules,  and all
instruments   supplementing  or  amending  or  confirming  this  Agreement,  and
references to "Article" or "Section" are to the specified  Article or Section of
this Agreement;

"Alberta Crown Royalties" has the meaning ascribed thereto in
Section 5.1(b);

"Assets"  means all of the assets of the Company  including  the  Petroleum  and
Natural Gas Rights, the Miscellaneous  Interests and the Tangibles and all other
assets  described,  referred to, or included  expressly or by implication in the
July 31 Balance
Sheet, other than the Excluded Assets;

"Assessment" has the meaning ascribed thereto in Section 9.6(a);

      "Audit Notice" has the meaning ascribed thereto in Section
9.3(a);

"Audited Balance Sheet" has the meaning ascribed thereto in
Section 2.3(b);

      "Auditors" has the meaning ascribed thereto in Section

                                       




2.3(b);

"BDP" means Burnet, Duckworth & Palmer, Barristers and
Solicitors, Calgary, Alberta, solicitors for the Purchaser;

"BJV" means Bennett Jones Verchere, Barristers and Solicitors,
Calgary, Alberta, the solicitors for the Vendors and the Company;

"Business Day" means a day, other than a Saturday,  Sunday or statutory holiday,
on which the principal commercial banks located in Calgary, Alberta are open for
business during normal banking hours;

"Claim Notice" has the meaning ascribed thereto in Section
9.1(a);

"Claims" means any claim, demand,  action, cause of action,  damage, loss, cost,
liability or expense,  including reasonable legal fees and all costs incurred in
investigating,  defending  or pursuing any of the  foregoing  or any  proceeding
relating to any of the foregoing;

"Class A Shares" means Class A shares (without nominal or par
value) in the capital of the Company;

"Class B Shares" means Class B shares (without nominal or par
value) in the capital of the Company;

"Closing" means the completion of the sale and purchase of the
Purchased Shares under and as contemplated in this Agreement;

"Closing  Date"  means the date on which  Closing  is to occur (as  provided  in
Section  2.4) which  shall be the  Business  Day on which all of the  conditions
precedent  set  forth in  Articles  6 and 7 have  been  satisfied  or  waived in
writing,  provided  however that in no event will Closing occur earlier than the
second Business Day after the Business Day on which the Section 116 Certificates
are received, or such other date as the Parties may agree as the date upon which
the Closing shall take place;

"Closing Purchase Price" has the meaning ascribed thereto in
Section 2.1;

"Closing Statement" has the meaning ascribed thereto in Section
2.3(a);

"Closing Time" means 10:00 o'clock a.m., local time at the Place of Closing,  on
the Closing Date or at such other time as the Parties may agree;

"Company" means CGGS Canadian Gas Gathering Systems Inc., a
corporation incorporated under the laws of Canada;

      "Contractual Claim" has the meaning ascribed thereto in

                                       




Section 9.1(a);

"Corporate Tax Act" has the meaning ascribed thereto in Section
3.9(h);

"Curtis Mallet" means Curtis, Mallet-Provost, Colt & Mosle,
Attorneys and Counsellors at Law, New York, New York, attorneys
for the Vendors;

"Damages" has the meaning ascribed thereto in Section 9.1(a);

"Debenture Prepayment Agreement" means an agreement between the
Company and the holders of the Old Debentures in the form of
Schedule 6.17;

"Debentures"  means  all of the  debentures  to be issued  on the  Business  Day
immediately prior to Closing in payment for the Old Debentures, for an aggregate
principal amount in Canadian dollars equal to the Canadian dollar  equivalent of
the  aggregate  principal  amount of the Old  Debentures  set forth in  Schedule
1.1(c)  plus  interest  accrued  but  unpaid  thereon,   which  Canadian  dollar
equivalent shall be calculated based upon the noon rate of exchange for Canadian
interbank  transactions  established  by the Bank of Canada for the Business Day
immediately  prior  to the  Closing  Date  (or if such  rate  is for any  reason
unavailable, at the spot rate quoted for wholesale transactions by the Company's
bank at  approximately  noon (Toronto time) on that date in accordance  with its
normal  practice),  and which debentures shall otherwise be in substantially the
form attached as Exhibit "A" to the Debenture Prepayment Agreement;

"Deposit" has the meaning ascribed thereto in Section 2.7(a);

"Encumbrance"  means a Royalty,  pledge,  lien,  restriction,  charge,  security
agreement,  lease, title retention  agreement,  mortgage,  encumbrance,  charge,
option,  imperfection  of title or other adverse claim, of any kind or character
whatsoever;

"Engineering Report" means the "Evaluation of the P. & N.G.
Reserves of CGGS Canadian Gas Gathering Systems Inc. (as of
September 1, 1996)" prepared by Sproule Associates Limited;

"Environment" means the components of the earth and includes:

(a)   air, land, water, groundwater, soil and subsurface soil;

(b)   all layers of the atmosphere;

(c)   all organic and inorganic matter and living organisms;

(d)   the environment in the workplace; and

(e) the  interacting  natural  systems  that include  components  referred to in
subparagraphsa(a), (b), (c) and (d) above.

                                      




"Environmental  Approvals"  means  applicable  permits,  licences and  approvals
required by Governmental  Authorities  pursuant to the  Environmental  Laws with
respect to the use of a property or operation of a business;

"Environmental  Laws"  means all  applicable  Canadian,  Alberta and local laws,
by-laws, rules,  regulations,  orders,  information letters, interim directives,
general  bulletins and guidelines  (collectively,  in this  definition,  "laws")
relating to the protection of the environment and employee and public health and
safety, including those laws relating to the discovery, development, production,
gathering, use, storage, transmission, transportation, treatment and disposal of
Substances,  employee and product safety,  the emission,  discharge,  release or
threatened  release  of  Substances  into the air,  water or land and  clean-up,
remediation and contaminated sites;

"Equipment  Contracts"  means  the  motor  vehicle  leases,   equipment  leases,
conditional  sales  contracts,  title  retention  agreements  and other  similar
agreements relating to equipment between the Company and third Persons;

"Escrow Account" means the account established with the Escrow
Agent in which the Escrow Amount is deposited;

      "Escrow Agent" has the meaning ascribed thereto in Section
2.1(f)(i);

"Escrow Agreement" means the Escrow Agreement between Abraxas,
the Purchaser, the Vendors, Feshbach and the Escrow Agent in
substantially the form of Schedule 7.7;

      "Escrow Amount" has the meaning ascribed thereto in Section
2.1(f)(i);

"Established Contractual Claim" has the meaning ascribed thereto
in Section 9.2(a);

"Excluded Assets" means the "Assets" as defined in the Nevis
Agreement which are to be purchased by Morrison pursuant to the
Nevis Agreement;

"Excluded  Liabilities" means the "Assumed  Liabilities" as defined in the Nevis
Agreement which are to be assumed by Morrison pursuant to the Nevis Agreement;

"Facilities Interests" means the undivided participating
interests of the Company in and to each of the Major Facilities
as set forth in Schedule 1.1(a);

"Feshbach" means Bernard Feshbach, an individual residing in Palo
Alto, California;

"Feshbach  Consulting  Agreement" means the Consulting  Agreement made as of the






9th day of March,  1990  between  the Company and  Feshbach  and any  amendments
thereto;

"Financial  Statements" means the balance sheet,  income statement and statement
of changes in financial position of the Company for and in respect of its fiscal
year ending on October 31, 1995 which form part of Schedule 3.5;

"GE Consulting  Agreement" means the Consulting Agreement made as of the 9th day
of March,  1990  between the Company  and Gas  Systems III  Corporation  and any
amendments thereto;

"GEPT" means Gas Systems I Corporation, a corporation;

"GEPT II" means Gas Systems II Corporation, a corporation;

"Governmental  Authority" means each federal,  provincial and municipal  agency,
board,  tribunal,  ministry and department having jurisdiction over the Company,
the Assets or any of them;

"Interim Period" means the period from the date of this Agreement
until the Closing Date;

"Investors' Agreements" means collectively:

            (a)   the Unit Subscription Agreement and all amendments
thereto;

(b)   the Shareholders Agreement dated March 9, 1990 between all
of the parties to the Unit Subscription Agreement and all
amendments thereto;

(c) three Class B Stock Subscription Agreements each dated March 9, 1990 between
the Company and GEPT,  Morrison and Feshbach,  respectively  and all  amendments
thereto;

"Jefferies" means Jefferies & Company Inc., a company organized
and existing under the laws of the State of Delaware;

      "Jefferies Indemnification Letter" has the meaning ascribed
thereto in Section 3.7;

"Joint Venture Audit" has the meaning ascribed thereto in Section
9.3(a);

"July 31 Balance Sheet" means the unaudited  balance sheet for the Company as at
the close of business on July 31, 1996  restated to exclude the Excluded  Assets
(determined  without regard to whether any of the Company's accounts  receivable
were or were not  collected  after July 31, 1996) and the  Excluded  Liabilities
(determined  without regard to whether any of the Company's  liabilities were or
were not settled or paid after July 31, 1996), which forms part of Schedule 3.5;


                                       




"Lands"  means  collectively  all of the lands owned by the  Company  other than
lands included in the Excluded Assets, and includes the lands referred to in the
Property Schedule and the Petroleum Substances within, upon or under such lands,
together with the right to explore for and produce such Petroleum Substances;

"Leases" means  collectively  all of the leases  (including gas storage leases),
options for  leases,  subleases,  licences  (including  exploratory  licences of
occupation) and documents of title (or any replacements,  renewals or extensions
thereof  or  leases  derived  therefrom)  covering  the  Lands  and owned by the
Company,  including those described in the Property Schedule, by virtue of which
the  holder  thereof  is  granted  certain  rights  with  respect  to  Petroleum
Substances  within,  upon or under the  Lands or by  virtue of which the  holder
thereof is deemed to be entitled to a share of Petroleum Substances removed from
the Lands or any lands with which the Lands are pooled or unitized but excluding
any included in the Excluded Assets;

"Major Facilities" means the gathering, compression and
transportation facilities described in Schedule 1.1(a);

"Management Agreements" means collectively:

(a) the  Administration  Agreement  dated March 9, 1990  between the Company and
Morrison and the  Management  Agreement  dated March 9, 1990 between the Company
and  Morrison  and  all  amendments  to  either  of  such   agreements   (herein
collectively the "Morrison Agreements"); and

(b)   the GE Consulting Agreement; and

(c)   the Feshbach Consulting Agreement.

"Material"  means,  when  used  with  reference  to any  contract,  transaction,
agreement,  change,  commitment or effect,  that the economic or monetary  value
thereof to the Company is $500,000 or more;

"Material  Adverse Effect" means any adverse change in the financial  condition,
results of operations,  assets,  liabilities, or business of the Company that is
or may reasonably be expected to be Material to the Company;

"Material Contract" means the Management  Agreements,  the Investors' Agreements
and any other contract or commitment whether oral or written, involving payment,
whether  absolute,  contingent or  otherwise,  to or by the Company in excess of
$500,000 over the term of the contract or commitment or any commitment;

"Miscellaneous  Interests"  means the entire  right,  title and  interest of the
Company in and to all property,  assets and rights (other than the Petroleum and
Natural Gas Rights or the Tangibles) pertaining to the Petroleum and Natural Gas

                                      





Rights or the Tangibles or any rights relating  thereto and to which the Company
is entitled, including such interests in:

(a) all contracts, agreements, books, records, title opinions and reports, lease
and land files,  compilations,  surveys,  regulatory filings and other documents
(including agreements for the construction, ownership and operation of the Major
Facilities)  relating  directly to the  Petroleum and Natural Gas Rights and the
Tangibles and any rights in relation thereto;

(b) all  subsisting  rights to enter  upon,  use and occupy  the  surface of the
Lands,  any lands with which the Lands have been pooled or  unitized,  any lands
upon which the  Tangibles are located or any lands which are used to gain access
to any of the foregoing;

(c) all subsisting  rights to carry out any operations  relating to the Lands or
any lands with which the Lands have been  pooled or unitized or lands upon which
the Tangibles are located  including all well licences,  rights of way, crossing
agreements and easements;

(d)   all Wells, including the well bores of the Wells;

(e)   all subsisting disposal and injection leases;

(f)   all geological, engineering, geophysical, seismic and other
reports and data;

(g) all  Petroleum  Substances  produced from the Lands (or any lands with which
the Lands have been pooled or  unitized)  which are placed into tanks or storage
after August 1, 1996;

(h)   all intangible assets of any kind associated with any of the
foregoing;

but excluding any such interests relating to the Excluded Assets;

"Morrison" means Morrison Petroleums Ltd., a corporation
continued under the laws of Alberta;

"Nevis Agreement" means the agreement attached as Schedule 6.12;

"Nevis  Proceeds"  means the net cash proceeds  received by the Company from the
sale of the Excluded Assets:

(a) plus the aggregate  amount of cash  receipts by the Company  (other than the
said net cash proceeds from the sale of the Excluded  Assets)  during the period
from August 1, 1996 until the closing of the  transactions  contemplated  by the
Nevis Agreement insofar as the said receipts relate to the "Business" as defined
in the Nevis  Agreement,  and minus the aggregate amount of cash payments by the
Company  during  the  period  from  August 1,  1996  until  the  closing  of the

                                      





transactions  contemplated by the Nevis  Agreement  insofar as the said payments
relate to the "Business" as defined in the Nevis Agreement;

(b)   minus the aggregate of:

            (i) all legal,  accounting,  finders'  and other  fees and  expenses
incurred  or paid by the  Company in  connection  with the sale of the  Excluded
Assets and the within sale of the Purchased Shares; and

            (ii) the  amount  by which  the  aggregate  fees  payable  under the
Management  Agreements in respect of the period commencing on August 1, 1996 and
ending on the day  immediately  before  the  Closing  exceed  $200,000  for each
complete calendar month (or a pro rata amount for a partial month);

"Notice" has the meaning ascribed thereto in Section 11.4;

      "Notifying Party" has the meaning ascribed thereto in
Section 9.1(a);

"Offering Memorandum" means the Offering Memorandum of Abraxas
and the Purchaser related to the issuance and sale of
approximately U.S. $200 Million of senior notes;

"Old  Debentures"  means all of the debentures  which are as of the date of this
Agreement  uncancelled and which were issued  pursuant to the Unit  Subscription
Agreement  or the  Option  Agreement,  in the  principal  amounts  set  forth in
Schedule 1.1(c);

"Option" means the rights of GEPT II, Morrison and Feshbach  pursuant to Section
1.1 of the Option  Agreement and "Option  Agreement"  means that certain  Option
Agreement  dated  March  9,  1990  between  all  of  the  parties  to  the  Unit
Subscription  Agreement  (other than the Company) and GEPT II and all amendments
thereto;

"Parties"  means the Company, the Vendors, Abraxas and the
Purchaser collectively;

"Party" means either the Company, the Vendors collectively or
Abraxas and the Purchaser collectively;

"Permitted Encumbrances" means:

(a) easements,  rights of way, servitudes,  restrictions or other similar rights
in land,  including  rights of way and  servitudes for highways and other roads,
railways,  sewers, drains, gas and oil pipelines,  gas and water mains, electric
light, power, telephone,  telegraph or cable television conduits, poles, towers,
wires and cables;

(b) the rights reserved to or vested in any grantor,  government or other public
authority by the terms of any Lease or by any statutory provision, including any

                                        





rights to terminate any Lease or to require annual or other periodic payments as
a condition of the continuance thereof;

(c) liens imposed by statute securing the payment of Taxes other than in respect
of Taxes which are now due or hereafter become due in respect of a period ending
at or prior to the Closing Date;

(d) the  Regulations  and any rights  reserved to or vested in any  Governmental
Authority  to control or  regulate  any of the Assets in any  manner,  including
legally binding  requirements  imposed by statutes or  Governmental  Authorities
concerning  rates of production from operations on any of the Lands or otherwise
affecting recoverability of Petroleum Substances from the Lands;

(e) the rights of third parties to purchase Petroleum  Substances  produced from
the  Lands or any lands  with  which the  Lands  have been  pooled or  unitized,
pursuant  to  production  sales  contracts  or other  contracts  for the sale of
Petroleum  Substances  which  are  described  in  Schedule  3.31  or  which  are
terminable on not more than 60 days' notice;

(f) rights reserved to or vested in any Governmental  Authority to levy taxes on
minerals or the income  therefrom  or to limit,  control or regulate  any of the
Assets  in  any  manner  and  all  applicable  laws,  rules  and  orders  of any
Governmental Authority;

(g)  undetermined  or  inchoate  liens  (including,   processors',   operators',
mechanics',  builders',  materialmens' and similar liens) incurred or created as
security in favour of the Person  conducting  the operation of any of the Assets
arising in the ordinary course of business for the Company's proportionate share
of the costs and expenses of such operations  except in respect of costs now due
or delinquent or which become due or delinquent and relate to a period ending at
or prior to the Closing Date;

(h)  penalties  which  have  arisen  under  operating   procedures  and  similar
agreements  as a  consequence  of elections by the Company  prior to the Closing
Date not to participate in operations on the Lands to which the penalty applies,
and which are described in the Property Schedule;

(i) liens and security interests granted in the ordinary course of business to a
public  utility,  municipality  or  Governmental  Authority in  connection  with
operations pertaining to the Assets;

(j)   all Encumbrances (including lessor's royalties) described in
the Property Schedule;

(k)   all Encumbrances, exceptions, deficiencies and
qualifications set forth in the Title Opinions; and


                                       




(l)   other Encumbrances which are not, in the aggregate,
Material;

"Person" means any individual, sole proprietorship,  partnership, unincorporated
association,  unincorporated syndicate, unincorporated organization, trust, body
corporate,  natural  person in his  capacity  as  director,  trustee,  executor,
administrator  or other legal  representative,  including any shareholder of the
Company or any affiliate or employee of an officer or manager of the Company;

"Petroleum and Natural Gas Rights" means all of the Company's working interests,
royalty  interests,  production  payments,  profit  and  net  profit  interests,
reversionary interest and other in rem and contractual interests of the Company,
whether  absolute or contingent,  legal or beneficial,  in the Leases and Lands,
including  those  described in the Property  Schedule but excluding the Excluded
Assets;

"Petroleum Substances" means petroleum, natural gas and all related hydrocarbons
(including,   without  limitation,   all  liquid  hydrocarbons)  and  all  other
substances,  whether liquids,  gaseous or solids and whether hydrocarbons or not
(except coal but including sulphur) produced in association with such petroleum,
natural gas or related hydrocarbons;

"Place of  Closing"  means the  offices  of Cahill  Gordon & Reindel  at 80 Pine
Street,  New York, New York, or such other place as may be mutually agreed to by
the Parties;

"Preferential Right" means an option or preferential right of purchase, right of
first  refusal or similar  pre-emptive  rights to purchase  the Assets or any of
them;

"Prime  Rate"  means the rate of interest  established  from time to time by the
Canadian  Imperial Bank of Commerce at its main branch in Calgary,  Alberta,  as
its prime or  reference  lending rate for Canadian  dollar  commercial  loans in
Canada;

"Property Schedule" means the schedule attached as Schedule
1.1(b);

"Purchase  Price"  means  the  cash  consideration  which  will  be  paid by the
Purchaser to the Vendors,  which shall be equal to the Unadjusted Purchase Price
net of the  Adjustments as finally  settled as  contemplated  in Section 2.3 and
minus the adjustments if any made as contemplated in Section 2.9;

"Purchased Shares" means 2,813,738 Class A Shares and
937,910.6663 Class B Shares;

"Purchaser" means Canadian Abraxas Petroleum Limited, a
corporation incorporated under the laws of Canada;


                                       




"Real Property" means the real property listed in Schedule
1.1(b);

"Real Property Leases" means the real property leases listed in
Schedule 1.1(b);

      "Receiving Party" has the meaning ascribed thereto in
Section 9.1(a);

"Refund" has the meaning ascribed thereto in Section 9.6(e);

"Regulations" means all statutes,  laws, rules, orders and regulations in effect
from time to time and made by Governmental  Authorities having jurisdiction over
the Company or the Assets;

"Representative" has the meaning ascribed thereto in Section 1.8;

"Royalties" means all royalties, burdens, profits interests, production payments
and similar interests payable to the Crown, lessors and other Persons in respect
of or relating to the production or sale of Petroleum Substances;

"Schedule" has the meaning ascribed thereto in Section 1.9;

"Section 116 Certificate" means a certificate as contemplated in
Section 116 of the Act;

"Securities" means collectively the Purchased Shares, the Option,
the Old Debentures and the Debentures;

"Substance"   means  petroleum,   natural  gas,  or  other   hydrocarbons,   any
contaminant,  pollutant, waste, hazardous waste, toxic substance, dangerous good
or  hazardous  substance  that is likely  to cause  harm or  degradation  to the
environment or risk to human health or safety;

      "Substantial" and "Substantially",  when used in Sectionsa6.1 and 7.1 with
reference  to  the  truth  and  correctness  of a  Party's  representations  and
warranties,   mean  that  the  aggregate   adverse  effect  of  the  untruth  or
incorrectness  of all of the Party's  representations  and  warranties  does not
exceed  $3  Million,   measured  by   reference  to  the  cost  of  making  such
representations and warranties true and correct;

"Tangibles" means:

(a) the interests of the Company in and to all tangible depreciable property and
assets which are situate in, on or about the Lands or lands with which the Lands
have been  pooled or unitized or used or  intended  for use in  connection  with
production of Petroleum  Substances from the Lands or lands with which the Lands
have been pooled or unitized or for the gathering, processing,  transmission, or
treatment of such Petroleum Substances including production tubing, wellheads,

                                      




pipelines, flowlines, gathering systems, batteries, plants, and
other equipment, but excluding the Major Facilities and the
Excluded Assets; and

(b)   the Facilities Interests;

"Tax Returns"  means all returns,  reports,  declarations,  elections,  filings,
information returns and statements required to be filed in respect of Taxes;

"Taxes" includes all income,  capital, goods and services,  excise, property and
other taxes,  duties,  fees, premiums,  assessments,  imposts,  levies and other
charges of any kind  whatsoever  imposed or exigible by or payable to any taxing
or other governmental authority or agency within or outside of Canada,  together
with all interest, penalties or additional amounts imposed in respect thereof;

"Termination Agreements" means collectively:

      (a)   an agreement between the Company and Morrison to
terminate the Morrison Agreements, in the form of Schedule
6.13(a);

      (b)   an agreement between the Company and Feshbach to
terminate the Feshbach Consulting Agreement, in the form of
Schedule 6.13(b);

      (c) an agreement  between the Company and Gas Systems III  Corporation  to
terminate the GE Consulting Agreement, in the form of Schedule 6.13(c); and

      (d)   an agreement between the Company and the Vendors to
terminate the Investors' Agreements and the Option Agreement, in
the form of Schedule 6.13(d);

"Title Opinions" means collectively:

      (i) the title opinion of BJV dated  September 10, 1996 and entitled "Title
Opinion" in respect of certain  Petroleum  and Natural Gas Rights  owned by CGGS
Canadian Gas Gathering Systems Inc. (herein the "BJV Title Opinion");

      (ii) the title opinions of Code Hunter,  Barristers and Solicitors,  dated
July 25,  December 16 and  December  18, 1991  addressed  to the  Company,  with
respect to certain of the Petroleum and Natural Gas Rights; and

(iii) the title opinion of Howard Mackie, Barristers and Solicitors,  dated July
25, 1991 addressed to the Company and Novalta  Resources  Inc.,  with respect to
Petroleum and Natural Gas Rights in the Sundre area;

"Transition  Agreement" means the Transitional  Services Agreement to be entered

                                       





between Morrison and the Purchaser in the form of Schedule 6.13(e);

"Unadjusted Purchase Price" has the meaning ascribed thereto in
Section 2.1;

"Unit  Subscription  Agreement" means that certain Unit  Subscription  Agreement
dated March 9, 1990 between the Company and the Vendors (other than GEPT II) and
all amendments thereto;

"Vendors" means collectively the persons listed in Schedule
1.1(c);

"Wells" means all abandoned,  producing,  shut-in,  suspended,  injection, water
source and disposal wells located on the Lands or any lands with which the Lands
have been pooled or  unitized,  including  the wells  described  in the Property
Schedule; and

"Working Capital" means the aggregate of:

(a)   the difference between:

      (i)   the amount of the Company's current assets as set forth
on the July 31 Balance Sheet;

and

      (ii)  the aggregate of:

                  (A)   the amount of the Company's current
liabilities as set forth in the July 31 Balance Sheet;  and

                  (B)   the sum of $200,000; and

(b) the  interest  income of the  Company  actually  earned on an accrual  basis
during the period  from and  including  August 1, 1996 until but  excluding  the
Closing Date.

1.2   Certain Rules of Interpretation

(a)   Unless otherwise specified, all references to money amounts
are to Canadian currency.

(b) The  descriptive  headings of Articles and Sections are inserted  solely for
convenience   of  reference  and  are  not  intended  as  complete  or  accurate
descriptions  of content and shall not be used to interpret  the  provisions  of
this Agreement.

(c) The use of words in the  singular or plural,  or with a  particular  gender,
shall not limit the scope or exclude the  application  of any  provision of this
Agreement  or a  Schedule  to such  Person or Persons  or  circumstances  as the
context otherwise permits.


                                       




(d) Whenever a provision of this Agreement or a Schedule requires an approval or
consent by a party and notification of such approval or consent is not delivered
within the applicable time limit,  then, unless otherwise  specified,  the party
whose  consent or  approval  is required  shall be  conclusively  deemed to have
withheld its consent or approval.

(e) Unless  otherwise  specified,  time periods  within or  following  which any
payment is to be made or act is to be done shall be  calculated by excluding the
day on which the period commences and including the day on which the period ends
and by extending  the period to the next  Business Day following if the last day
of the period is not a Business Day.

(f) Whenever  any payment to be made or action to be taken under this  Agreement
is required to be made or taken on a day other than a Business Day, such payment
shall be made or action taken on the next Business Day following.

(g) The words  "including"  and  "includes"  shall be deemed to mean  "including
without limitation" and "includes without limitation" respectively.

1.3   Entire Agreement

This  Agreement,  including the Schedules to this  Agreement,  together with the
agreements  and other  documents  to be  delivered  pursuant to this  Agreement,
constitute the entire  agreement  between the Parties  pertaining to the subject
matter hereof and supersede all prior agreements,  understandings,  negotiations
and discussions,  whether oral or written, of the Parties other than, subject to
Section  10.1,  the  Confidentiality  Agreement  dated May 28, 1996  between the
Purchaser and the Company (the "Confidentiality Agreement"). The Confidentiality
Agreement shall  terminate if and when Closing occurs.  There are no warranties,
representations  or other agreements  between the Parties in connection with the
subject matter hereof except as specifically  set forth in this Agreement and in
any agreement or document delivered  pursuant to this Agreement.  No supplement,
modification,  waiver,  amendment  or  termination  of this  Agreement  shall be
binding unless executed in writing by the Parties.

1.4   Applicable Law and Jurisdiction

This Agreement shall be construed in accordance with the laws of the Province of
Alberta and the laws of Canada  applicable  in the Province of Alberta  (without
giving  effect to its  conflicts  of law  rules)  and shall be  treated,  in all
respects,  as an Alberta  contract.  Subject to Article  13, each of the Parties
irrevocably attorns and submits to the non-exclusive jurisdiction of any Alberta
court sitting in Calgary in any action or  proceeding  arising out of or related
to this Agreement and irrevocably  agrees that all claims in respect of any such
action or proceeding  shall be heard and determined in such Alberta court.  Each
of the Parties irrevocably waives any "inconvenient forum" or similar defence to

                                       





the maintenance of such action or proceeding.

1.5   Accounting Terms

All accounting  terms not otherwise  defined in this Agreement have the meanings
assigned to them in  accordance  with  Canadian  generally  accepted  accounting
principles.

1.6   Knowledge

Where a representation or warranty is made in this Agreement on the basis of the
knowledge or awareness of the Company,  such knowledge or awareness  consists of
the knowledge that each and every current officer, manager and supervisor of the
Company (or of Morrison to the extent he or she has  knowledge of the affairs of
the  Company)  has or ought to have  after  diligent  inquiry  (which  shall not
include a physical  inspection of the Assets specifically for the purpose of the
transaction), but does not include the knowledge of any other Person or Persons.

1.7   Liabilities

(a) The obligations and liabilities of each Vendor  hereunder shall be separate,
and not joint,  several or joint and  several.  Except  where an  obligation  or
liability  hereunder is the  obligation  or  liability  of a  particular  Vendor
because it arises out of, results from or is in any manner  connected with (i) a
breach or incorrectness of a particular Vendor's  representations and warranties
set forth in Sections  3.42 to 3.46  inclusive,  (ii) the breach by a particular
Vendor of any of its covenants or agreements hereunder or (iii) a claim based on
the fraud of a particular  Vendor,  each Vendor shall be separately liable for a
percentage of the obligation or liability equal to the particular Vendor's share
of the Purchase Price set forth in Schedule 1.1(c).

(b) The obligations  and liabilities of Abraxas and the Purchaser  hereunder are
joint and several.  Any of the Vendors,  the  Representative and the Company may
bring separate  actions  against  either Abraxas or the Purchaser  without first
having  proceeded  against  the other,  in respect  of any such  obligations  or
liabilities,  and shall not be required to exhaust their recourse against either
Abraxas or the Purchaser before being entitled to performance from the other.

1.8   Joint Rights

(a) The Vendors hereby,  and pursuant to that certain  Representation  Agreement
dated as of the Closing Date between the Vendors and Feshbach,  appoint Feshbach
as their representative  (herein the "Representative") who shall have full power
and authority to make all decisions relating to adjustments  provided in Article
2, to exercise elections and options and take all actions necessary or permitted

                                      





to be taken pursuant to Article 9, to undertake the defence or settlement of any
claims for which the  Vendors may be required to  indemnify  the  Purchaser,  to
receive the  payments  and  prepayments  contemplated  to be made to the Vendors
pursuant to the provisions of this Agreement,  including  Sections 2.1, 2.3, 2.7
and 9.7, to waive any or all of the conditions  precedent set forth in Article 7
on behalf of the Vendors  other than Morrison and to take all such other actions
provided  herein or in the Escrow  Agreement  to be taken by the  Representative
(and any other actions reasonably related or ancillary  thereto),  including the
power to execute and deliver the Escrow  Agreement  and such other  documents as
may  be  necessary  for  the  foregoing  purposes,  provided  however  that  the
Representative  shall not in any event have any authority to waive, on behalf of
Morrison,  any or all of the  conditions  precedent  set forth in Article 7. The
Vendors  hereby  authorize the  Representative  to deliver the Debentures to the
Company  marked  paid-in-full  upon  payment of the  principal  and all interest
accrued but unpaid thereon as contemplated in Section 9.7.

      (b) All actions to be taken by the Vendors herein except as may be limited
by  Section  1.8(a)  may  be  taken  by the  Representative.  The  Vendors  also
irrevocably  authorize  the  Representative  to be the  recipient  of any Notice
required to be given or made by the  Purchaser to any of the Vendors  hereunder,
and any Notice received by the  Representative  shall be deemed for all purposes
to be received by all of the Vendors.

      (c) If the  Representative  resigns from such position,  the Vendors shall
promptly  select  another  person  from  among  the  Vendors  (or  their  heirs,
executors, administrators,  personal representatives,  successors or assigns) to
fill such vacancy.  All decisions and actions by the  Representative,  including
any  agreement  between the  Representative  and the  Purchaser  relating to any
negotiated  adjustment of the Purchase  Price,  any defence or settlement of any
claims  for which a Vendor or the  Vendors  may be  required  to  indemnify  the
Purchaser,  any  decision,  action or  agreement  to be made or taken  under the
Escrow Agreement, the Escrow Agreement or any other action provided herein to be
taken by Representative, shall be binding upon all of the Vendors, and no Vendor
shall have the right as between such Vendor and  Purchaser  to object,  dissent,
protest or otherwise contest the same.

(d) The  provisions  of this  Section 1.8 are  independent  and  severable,  are
irrevocable and are coupled with an interest  running in favour of the Purchaser
and shall be enforceable  notwithstanding any rights or remedies that any Vendor
may have in connection  with the  transactions  contemplated  by this Agreement.
Damages as the remedy for any breach of the provisions of this Section 1.8 would
be inadequate, with the result that the Purchaser shall be entitled to temporary
and permanent  injunctive relief without the necessity of proving damages if the

                                       





Purchaser brings an action to enforce the provisions of this Section 1.8.

      (e) The  provisions  of this  Section 1.8 shall be binding upon the heirs,
executors, administrators,  personal representatives,  successors and assigns of
each Vendor. All fees and expenses of or incurred by the Representative shall be
paid by the Vendors from sources other than the Escrow Amount.


                                       





1.9   Schedules

The following schedules to this Agreement (herein collectively
the "Schedules"), as listed below, are incorporated in this Agreement:


      Schedule          Description

      Schedule 1.1(a)         Major Facilities
      Schedule 1.1(b)         Property Schedule and List of Wells
      Schedule 1.1(c)         Vendors and Securities
      Schedule 3.5            Financial Statements
      Schedule 3.6            Financial Commitments and AFEs
      Schedule 3.9            Non-Restricted Resource Properties
      Schedule 3.10     Equipment Contracts
      Schedule 3.14           Material Contracts
      Schedule 3.15           Litigation
      Schedule 3.20           Employees
      Schedule 3.21           Insurance
      Schedule 3.23           Bank Accounts
      Schedule 3.25           Environmental Matters
      Schedule 3.31           Production Sale, Processing,
Transportation and Other Contracts
      Schedule 6.7(a)         BJV Opinion
      Schedule 6.7(b)         Vendors' Counsel's Opinion
      Schedule 6.8            Title Opinion Update
      Schedule 6.10           Release
      Schedule 6.12           Nevis Sale Agreement
      Schedule 6.13           Termination Agreements and Transition
Agreement
      Schedule 6.17           Debenture Prepayment Agreement
      Schedule 7.5(a)         BDP Opinion
      Schedule 7.5(b)         Cox & Smith Opinion
      Schedule 7.6            Release
      Schedule 7.7            Escrow Agreement


ARTICLE 2
PURCHASE AND SALE

2.1   Action by Vendors and Purchaser

In accordance with this  Agreement,  the Vendors shall sell,  transfer,  assign,
convey and deliver to the Purchaser,  and the Purchaser  shall purchase from the
Vendors,  the  Purchased  Shares,  and the Vendors  shall cause the Option to be
terminated,  for an aggregate  purchase  price of $115 Million (the  "Unadjusted
Purchase Price"), subject to:

(a)   increases in respect of Working Capital, the Nevis Proceeds
and interest as provided in Section 2.2;

(b) decreases in respect of the principal amount of the Debentures plus interest
accrued but unpaid thereon as at the Closing Date as provided in Section 2.2;

(c)   decreases, if any,  as provided in Section 2.9; and


                                       




(d) a decrease  equal to  $4,047,088,  being the  aggregate  amount of interest,
expressed in Canadian dollars,  paid by the Company, on the Old Debentures on or
about October 1, 1996 in respect of the period  commencing on August 1, 1996 and
ending on September 30, 1996;

(as so adjusted for Closing, the "Closing Purchase Price"). Each Vendor shall be
entitled to the  percentage of the Purchase Price set forth opposite its name in
Schedule  1.1(c).  At the  Closing  Time,  upon and  subject  to the  terms  and
conditions of this Agreement:

(e)  the  Vendors  shall  transfer  and  deliver  to  the  Purchaser  the  share
certificates representing all of the Purchased Shares duly endorsed in blank for
transfer,  or accompanied by an irrevocable  security transfer power of attorney
duly executed in blank, in either case by the holder of record thereof,  and the
parties  to  the  Option  Agreement  shall  execute  and  deliver  an  agreement
terminating the Option, and shall take such steps as shall be necessary to cause
the  Company  to enter the  Purchaser  or its  nominee(s)  upon the books of the
Company  as the  holder of the  Purchased  Shares and to issue one or more share
certificates  to the  Purchaser or its  nominee(s)  representing  the  Purchased
Shares; and

(f)   the Purchaser shall pay the Closing Purchase Price as
follows:

      (i) $5.75 Million  (herein the "Escrow  Amount") shall be paid to Montreal
Trust Company of Canada, as the escrow agent (herein the "Escrow Agent"),  to be
held and distributed pursuant to the Escrow Agreement; and

      (ii) the  remainder  of the  Closing  Purchase  Price shall be paid to the
order of the Representative by wire transfer in immediately  available funds (to
an account at a financial institution to be designated by the Representative not
later than 2 Business  Days prior to Closing) and forthwith  thereafter  paid by
the  Representative  to the order of each Vendor in the  respective  amounts set
forth in Schedule 1.1(c) by wire transfer in immediately  available funds to the
account designated by each Vendor at least 2 Business Days prior to Closing.

2.2   Adjustments to Purchase Price

(a)   The Unadjusted Purchase Price shall be increased by an
amount equal to the aggregate of:

      (i)   the Working Capital; and

      (ii)  the Nevis Proceeds.

(b) The  Unadjusted  Purchase  Price shall be  increased  by an amount  equal to
interest on the  Unadjusted  Purchase Price at the Prime Rate from and including

                                       





August 1, 1996 to but  excluding the Closing  Date,  calculated  monthly and not
compounded.

(c) The  Unadjusted  Purchase  Price shall be reduced by an amount  equal to the
principal  amount of the Debentures plus interest  accrued but unpaid thereon as
at the Closing Date.

(d)   The unadjusted Purchase Price shall be decreased as set
forth in Section 2.1(d).

2.3   Closing and Post-Closing Adjustments

(a) The Company  shall  initially  prepare and,  not later than 5 Business  Days
prior to the Closing  Date,  deliver a draft  statement  of Closing  adjustments
(herein the "Closing  Statement") as contemplated in Sections 2.1(a) and (b), to
the Purchaser for review.  The  Representative and the Purchaser shall cooperate
in settling and agreeing to the amounts to be set forth on the Closing Statement
to be used pursuant to the provisions of this Section 2.3. The Closing Statement
shall be utilized for the purpose of settling for Closing the  adjustments to be
made pursuant to Sectiona2.2 (herein the "Adjustments") and shall also set forth
the adjustments, if any, to be made pursuant to Section 2.9.

(b) Forthwith  after  Closing,  in order to settle the  Adjustments  finally and
thereby to settle the Purchase Price, the Purchaser and the Representative shall
cause the Adjustments, including the July 31 Balance Sheet insofar as it relates
to the Adjustments,  to be audited jointly by their respective  auditors (herein
the  "Auditors"),  in  accordance  with  generally  accepted  Canadian  auditing
standards.  The Representative and the Purchaser shall cooperate fully with such
audit so as to cause the  Auditors to complete  such audit  within 90 days after
the  Closing  Date.  The   Representative  and  the  Purchaser  shall  have  the
opportunity,  at their own expense, to review the work papers of the Company and
the Auditors  relating to such audit.  If the Purchaser  and the  Representative
agree with all changes  resulting from the said audit, the July 31 Balance Sheet
insofar as it relates to the  Adjustments as so audited and changed  (herein the
"Audited  Balance  Sheet") shall for the purposes of this Article 2 be deemed to
be the  July 31  Balance  Sheet as  revised  by  virtue  of such  audit  and the
Adjustments shall be recalculated to take all revisions resulting from the Audit
into account.  If either or both of the Purchaser and the  Representative do not
agree  with any of the said  changes  resulting  from the said  audit,  or their
respective  Auditors do not agree as to any matter,  either the Purchaser or the
Representative  may,  within 15 Business Days after receipt by it or them of the
Audited  Balance  Sheet and the  statement of the  recalculated  Adjustments  or
notice from one of the Auditors of any such  disagreement,  give written  notice
(an "Audit Notice") of any such disagreement,  with reasons, to the other Party.
If neither the Purchaser nor the Vendor  notifies the other of any  disagreement
within 15 Business  Days after its receipt of the Audited  Balance Sheet and the

                                       





recalculated  Adjustments  they  shall be deemed to have  accepted  the  Audited
Balance Sheet and the recalculated  Adjustments as so changed. The Purchaser and
the  Representative  shall have reasonable access to the other's records and the
records of the Company in order to resolve any disagreements.

(c) If a  disagreement  is made the subject of an Audit Notice and the Purchaser
and the  Representative  fail to resolve  such dispute  within 10 Business  Days
after the date on which the Purchaser or the Representative gave an Audit Notice
with  respect  to  the  proposed  change,  then  the  Calgary  office  of  Price
Waterhouse,  Chartered  Accountants  (herein the  "Accounting  Firm"),  shall be
engaged forthwith to resolve any remaining  disputes.  The Accounting Firm shall
be required to render its decision  within 25 Business Days after the dispute is
referred to it. The decision of the Accounting  Firm shall be final and binding.
The fees and  expenses  of the  Accounting  Firm shall be shared  equally by the
Vendor and the Purchaser.

(d)  Payment of any  amount  arising by virtue of changes in the July 31 Balance
Sheet or the  Adjustments  pursuant  to this  Section  2.3 shall be  subject  to
Sectiona116 of the Act, shall be made within 10 Business Days after the disputed
portion has been agreed upon by the Parties or determined by the Accounting Firm
pursuant to this Section  2.3, and shall  include in addition an amount equal to
interest  at the Prime  Rate  calculated  from the  Closing  Date to the date of
payment.

2.4   Place and Time of Closing

The Closing shall take place at the Place of Closing on the Closing Date.

2.5   Tender

Any tender of documents or money pursuant to this Agreement may be made upon the
Parties or their respective counsel and, subject to Section 2.1(e),  money shall
be tendered by  official  bank draft drawn upon a Schedule 1 Canadian  chartered
bank.

2.6   Section 116 Certificate

The Vendors shall,  prior to Closing,  make reasonable efforts to obtain Section
116 Certificates in respect of the Purchase Price.

2.7   Deposit

(a) The Parties  acknowledge that the Purchaser has paid a deposit of $2 million
(herein the "Deposit"),  which shall be held in an  interest-bearing  account by
the  Representative  and  disposed of in  accordance  with this Section 2.7. The
Deposit shall be invested in an instrument  selected by the  Representative,  of
which it gives  timely  written  notice  to the  Purchaser  and  which  shall be

                                      





available  for  investment  or  purchase  at the branch of a Schedule 1 Canadian
chartered bank in Calgary.

(b) If Closing occurs, the Deposit, together with interest earned thereon by the
Purchaser  while it is held in  trust,  shall be paid to the  Representative  at
Closing and applied against the Closing Purchase Price.

(c) If  Closing  does not occur,  notwithstanding  that the  Vendors  are ready,
willing and able to complete the sale of the  Purchased  Shares and to terminate
the Option as  contemplated  herein,  the  Section  116  Certificates  have been
received and all of the conditions  precedent set forth in Article 6 (other than
in Section 6.9, if it has not then been  satisfied,  complied  with or waived in
writing  by the  Purchaser)  have  been  satisfied,  complied  with or waived in
writing by the Purchaser or Abraxas,  the Deposit  together with interest earned
thereon  shall be  forfeited  to the  Vendors (in the  proportions  set forth in
Schedule  1.1(c)),  in full and  complete  satisfaction  of all claims which the
Vendors may have in connection  with  Purchaser's  failure or refusal to perform
its obligations hereunder.

(d) If Closing  does not occur for any reason other than as set forth in Section
2.7(c) or this Agreement terminates pursuant to Section 12.1(a)(ii), the Deposit
together with interest earned thereon shall be paid to the Purchaser.

2.8   Limitation

Notwithstanding  any other  provision  of this  Agreement  or any rule of law or
equity,  the  maximum  amount of  damages  and other  compensation  to which the
Purchaser  shall be  entitled  if  Closing  does not occur  solely or  partially
because of the  failure or refusal of the  Company  and the Vendors or either of
them to perform  their  obligations  hereunder is $2 million,  which shall be in
addition to the return of the Deposit plus interest  thereon as  contemplated in
Section 2.7(d).

2.9   Representations and Warranties; Material Adverse Damage

If any of the representations and warranties set forth in Article 3 are not true
and  correct  on the  Closing  Date,  or  physical  damage  occurs to any of the
Petroleum and Natural Gas Rights,  Tangibles or Miscellaneous  Interests and the
uninsured portions of the cost of repair is less than $3 Million,  (or more than
$3 Million and the Parties agree to reduce the Purchase Price by such amount) as
the case may be,  then,  subject to  Articles 6 and 7, the  Unadjusted  Purchase
Price shall be decreased  at Closing by an amount equal to the cost,  if any, of
making the  representations  and warranties true and correct on the Closing Date
and of the uninsured costs of repair,  as the case may be, and the Parties shall
in good faith attempt to agree on the said amounts. If the Parties are unable to
agree on  either  or both of the said  amount  or  amounts,  the said  amount or
amounts shall be settled by  arbitration  in accordance  with Article 13 and the

                                      





Closing Date shall be extended in order for the  arbitration  proceedings  to be
conducted and the  arbitrator's  decision to be rendered.  The Parties shall use
their best efforts to cause the arbitration  proceedings to be conducted and the
arbitrator's  decision to be rendered  within 20 Business Days. For the purposes
of a dispute as to the said amount under this  Section  2.9,  the notice  period
contemplated in Section 13.1(b) shall be 1 Business Day.

2.10  [Intentionally Deleted]


ARTICLE 3
REPRESENTATIONS AND WARRANTIES OF THE VENDORS AND THE COMPANY

The  Company  hereby  makes  the  representations  and  warranties  set forth in
Sections 3.1 to 3.41, inclusive, to the Purchaser.

3.1   Incorporation and Registration

The Company is a corporation duly incorporated,  organized, validly existing and
in good standing under the laws of Canada and has all necessary corporate power,
authority  and  capacity  to own its  properties  and assets and to carry on its
business as  presently  conducted.  Neither the nature of its  business  nor the
location or character of the properties  owned or leased by the Company requires
the  Company to be  registered,  licensed  or  otherwise  qualified  as an extra
provincial or foreign  corporation or to be in good standing in any jurisdiction
other than in the Province of Alberta. The Company is duly registered,  licensed
and otherwise  qualified and in good standing for such purpose in such province.
The Company has all governmental  licences and permits (other than Environmental
Approvals,  which are referred to in Section 3.25)  necessary or  appropriate to
own and operate (to the extent it is the  operator  thereof)  the Assets and the
Excluded Assets and the Company is in Material compliance with all such licences
and permits.

3.2   Subsidiaries

The Company has no subsidiaries.

3.3   Capital

(a) The authorized  share capital of the Company consists of an unlimited number
of Class A Shares and Class B Shares. The Purchased Shares constitute all of the
issued and  outstanding  shares in the  Company and all of such shares have been
duly and validly  issued and are  outstanding  as fully paid and non  assessable
shares of the  Company.  There  are no  options,  warrants,  calls,  rights,  or
agreements to which the Company or any Vendor is a party or by which it is bound
obligating the Company or any Vendor to issue, deliver or sell, or cause to be

                                       




issued,  delivered or sold,  shares of capital stock or other  securities of the
Company or obligating  the Company or any Vendor to grant,  extend or enter into
any such  option,  warrant,  call,  right or  agreement,  and no  securities  or
obligations  convertible  into or exchangeable for shares or other securities of
the  Company  have been  authorized  or agreed to be issued or are  outstanding,
otherwise than pursuant to the Option Agreement.

(b) The Old Debentures  constitute all of the issued and outstanding  debentures
which were issued  pursuant to the Unit  Subscription  Agreement  and the Option
Agreement.  Upon the  issuance  of the  Debentures  the Old  Debentures  will be
canceled  and the Company will have no further  obligation  or duty with respect
thereto.

(c) The share and debenture  registers will immediately prior to Closing reflect
the  ownership  of  Purchased  Shares and  Debentures  as set forth in  Schedule
1.1(c).

3.4   Absence of Conflicting Agreements

The execution and delivery of this Agreement does not, and the  consummation  of
the transactions  contemplated  hereby and compliance with the provisions hereof
will not,  conflict  with,  or result in any  violation  of, or default (with or
without  notice  or  lapse  of  time,  or  both),  or give  rise  to a right  of
termination,  cancellation or acceleration of any obligation or to the loss of a
material  benefit,  or result in the  creation  of any  lien,  pledge,  security
interest,  adverse claim, charge, or other encumbrance upon any of the Assets or
the  Excluded  Assets  (any  such  conflict,   violation,   default,   right  of
termination,  cancellation  or  acceleration,  loss or creation,  a "Violation")
pursuant to, any provision of:

      (a) the Articles of Incorporation,  as amended, or By-laws, as amended, of
the Company (a true and complete copy of each of which as of the date hereof has
been delivered to the Purchaser);

      (b)  any  contract,  agreement,  loan or  credit  agreement,  note,  bond,
debenture, mortgage, indenture, lease, employee benefit plan or other agreement,
obligation,  instrument, permit, concession, franchise, or license applicable to
the Company, the Assets or the Excluded Assets (a true and complete copy of each
of which as of the date hereof has been delivered to Purchaser); or

      (c) any judgment, injunction, order, decree, statute, law, ordinance, rule
or regulation applicable to the Company or the Assets or the Excluded Assets.

3.5   Financial Statements

Except  insofar  as the July 31  Balance  Sheet  excludes  the  Excluded  Assets
(determined  without regard to whether any of the Company's accounts  receivable

                                      





were or were not  collected  after July 31, 1996) and the  Excluded  Liabilities
(determined  without regard to whether any of the Company's  liabilities were or
were not settled or paid after July 31, 1996):

(a) the  Financial  Statements  and the July 31 Balance  Sheet and the books and
accounts of the Company have been prepared in accordance with Canadian generally
accepted  accounting  principles  applied  on a basis  consistent  with  that of
preceding periods;

(b) the Financial Statements and the July 31 Balance Sheet present fairly all of
the assets and liabilities  and the financial  position of the Company as at the
respective dates thereof;

(c)   the Financial Statements present fairly the results of
operations and statement of changes in financial position for the
periods then ended;

(d) except to the extent  reflected  or reserved  against in the July 31 Balance
Sheet or as otherwise  disclosed in Schedule 3.5, the Company has no outstanding
indebtedness, liabilities or obligations, whether contingent or absolute;

(e) the Financial Statements and the July 31 Balance Sheet have been prepared in
accordance with the books and accounts of the Company; and

(f) the  statement  of income  included  in the  Financial  Statements  does not
include any items of special  nonrecurring income or any other income not earned
in the ordinary course of business except as expressly specified therein.

3.6   Absence of Unusual Transactions

Except for the sale of the Excluded  Assets and the  assumption  of the Excluded
Liabilities as contemplated by the Nevis Agreement, or as otherwise disclosed in
Schedule 3.6 or as permitted in Section 8.1, since July 31, 1996 the Company has
not:

(a)   transferred, assigned, sold or otherwise disposed of any of
the Assets or canceled, waived or released any debts or claims;

(b)  mortgaged,  pledged,  subjected  to lien,  granted a security  interest  or
otherwise  encumbered  any  of its  assets  or  property,  whether  tangible  or
intangible, other than Permitted Encumbrances;

(c)  authorized,  incurred  or assumed  any  capital  expenditure  or  financial
commitment or other obligation or liability  (fixed or contingent)  except those
listed  in the July 31  Balance  Sheet  and  except  unsecured  obligations  and
liabilities  incurred  in the  ordinary  and usual  course of  business  and not
exceeding $500,000 in the aggregate;

                                       




(d)  suffered  an  extraordinary  loss,  waived or omitted to take any action in
respect of any rights of  substantial  value,  or entered into any commitment or
transaction not in the ordinary and usual course of business;

(e) issued or sold any shares in its capital or any warrants,  bonds, debentures
or other corporate securities of the Company or issued, granted or delivered any
right, option or other commitment for the issuance of any such securities or any
other securities;

(f)   amended or changed or taken any action to amend or change
its Articles of Incorporation or By-laws;

(g)   authorized, agreed or otherwise become committed to do any
of the foregoing; or

(h) from  August  1,  1996 to the date of this  Agreement,  breached  any of the
provisions  of Section 8.1 (which shall be read for the purposes of this Section
3.6(h) as if the  Interim  Period  commenced  on August 1, 1996 and ended on the
date of this Agreement).

3.7   Absence of Guarantees

Except  for  indemnities  set  forth  in  the  By-Laws  of the  Company,  in the
Management  Agreements and in the  indemnification  letter agreement (herein the
"Jefferies  Indemnification Letter") dated February 26, 1996 between the Company
and Jefferies described in Schedule 3.14, the Company has not given or agreed to
give, and is not a party to or bound by any guarantee or indemnity in respect of
indebtedness  or other  obligations,  of any Person or any other  commitment  by
which the Company is or may be  responsible or liable for such  indebtedness  or
other  obligations,  provided that if any claim is made by Jefferies against the
Company for  indemnification  pursuant to the said letter agreement,  the amount
claimed by  Jefferies  shall be treated as Damages as defined in Section  9.1(a)
and all of the  provisions  of  Article  9 with  respect  to  Damages  shall  be
applicable.

3.8   Restrictive Covenants

Except for the Management Agreements,  the Company is not a party to or bound or
affected by any commitment,  agreement or document containing any covenant which
limits the  freedom of the  Company  to compete in any line of  business,  or to
transfer or move any of its Assets or  operations or which affects or may affect
the business  practices,  operations or conditions or the continued operation of
the business of the Company after the Closing on substantially the same basis as
such businesses are carried on at the date of this Agreement.



                                       


3.9   Tax Matters

(a) The Company has duly and timely filed its Tax Returns  with the  appropriate
taxing or other  governmental  authority  or  agency  and its Tax  Returns  were
prepared  in  accordance  with the books and  accounts  of the  Company  and the
information  contained in such Tax Returns is true, complete and accurate in all
Material respects.

(b) The Company has duly and timely paid all Taxes,  including all  installments
on account of Taxes for the current year,  that it reasonably  believed were due
and  payable  by it and the July 31  Balance  Sheet  sets  forth,  as an  amount
payable, an amount not less than the amount of all Taxes that are or will become
due and  payable in  respect  of  periods  ending on or prior to August 1, 1996,
except amounts which may become payable after  completion of the current Revenue
Canada income tax audit for the  Company's  1993,  1994 and 1995 taxation  years
which are not individually or in the aggregate Material.

(c) The Company has not  entered  into any  agreement  or other  arrangement  or
executed any waiver except with respect to its 1991 tax year  providing for, any
extension of time within which (i) to file any Tax Return covering any Taxes for
which the  Company is or may be liable,  (ii) the  Company is required to pay or
remit any Taxes or amounts on account of Taxes or (iii) any taxing authority may
assess or collect Taxes for which the Company is or may be liable.

(d) The Canadian  federal and provincial  income and capital tax  liabilities of
the Company have been assessed by the relevant  taxing  authority and notices of
assessment have been issued to the Company by the relevant taxing  authority for
all taxation years ending on or prior to October 31, 1995, provided however that
amended returns have been filed in respect of the Company's 1991, 1992, 1993 and
1994 tax years and no  reassessments or confirmations of increases or losses has
been received in respect thereof.

(e) There are no actions, suits, proceedings,  investigations,  audits or claims
now pending or, to the knowledge of the Company, threatened, against the Company
in  respect  of any Taxes and there are no  matters  under  discussion  with any
taxing authority relating to Taxes, except as described in Section 3.9(b).

(f) The Company has duly and timely withheld from any amount paid or credited by
it  to or  for  the  account  or  benefit  of  any  Person,  including,  without
limitation,  any of its employees,  officers and directors and any  non-resident
Person, the amount of all Taxes and other deductions  required by any applicable
law,  rules or  regulations to be withheld from any such amount and has duly and
timely  remitted  the  same to the  appropriate  taxing  or  other  governmental
authority or agency.

(g)   The Company is not a section 1504(d) corporation for United
States tax purposes and has not filed consolidated United States tax returns.

                                       






(h) The Company is not an "above-limit  corporation",  "restricted corporation",
member of an "above-limit partnership" or "restricted partnership" or associated
with a  "restricted  corporation"  as those  phrases are defined and used in the
Alberta  Corporate Tax Act, as amended (herein the "Corporate Tax Act"), and the
Company is not the subject of a direction by the Provincial  Treasurer (Alberta)
pursuant to  subsection  26.1(9) or (10) of the  Corporate Tax Act, nor does the
Company nor the Vendors have any reason to believe that the provincial treasurer
is contemplating  or likely to make any such direction.  Each of the Assets is a
"restricted  resource  property" as defined in the Corporate Tax Act,  except as
described in Schedule 3.9.

(i) Immediately before Closing, the following tax pools of the Company,  will be
at least:

            (i)   Undepreciated capital cost                            $0
                  (as defined for the purposes of the Act)

            (ii)  Cumulative Canadian development expense               $1.3
million
                  (as defined in Section 66.2(5) of the Act)

            (iii)       Cumulative Canadian oil and gas property
expense     $25.5 million
                  (as defined in Section 66.4(5) of the Act)

            (iv)  Cumulative Canadian exploration expense               $0
                  (as defined in Section 66.1(6) of the Act)

            (v)   Undeducted non-capital losses             $4.2 million
                  (as defined in Section 111(8) of the Act)

3.10  Equipment Contracts

Schedule 3.10 sets forth a true and complete list of the Equipment Contracts and
the equipment and vehicles which are subject to Equipment Contracts.  All of the
Equipment  Contracts  are in full force and effect and no default  exists on the
part of the  Company or, to the  knowledge  of the  Company,  on the part of any
other party  thereto and the  Company  has not  received  notice of an intent to
terminate  or amend such  contracts by the other party  thereto.  Except for the
Excluded Assets,  equipment and vehicles subject to the Equipment Contracts, and
the vehicles and other  equipment  described in Schedule  3.10,  no Person other
than the  Company  owns any  equipment,  vehicles  or other  tangible  assets or
property used in or necessary for the operation of the business of the Company.

3.11  Real Property and Real Property Leases

The Company owns no real property or interests  therein,  and is not a party to,

                                       





or bound by,  any  leases or  subleases  of any real  property,  other  than its
interests in the Lands, the Leases and the Major Facilities.

3.12  Title to Assets

(a) The  Assets  are and  will be at the  Closing  Time  free  and  clear of all
Encumbrances  created by,  through or under the  Company,  except for  Permitted
Encumbrances.

(b) The Company has not done or failed to do any act or thing whereby any of the
Petroleum  and Natural Gas Rights or Tangibles  may become  liable or subject to
termination, surrender, forfeiture, cancellation or alienation.

3.13  Quiet Enjoyment

Except  for  interruptions  which in the  aggregate  would  not have a  Material
Adverse Effect, subject to the rents, covenants,  conditions and stipulations in
the Leases and on the lessee's or holder's part thereunder to be paid, performed
and observed and to the Permitted Encumbrances, the Company, after Closing, will
continue  to  hold  and  enjoy  the  Petroleum  and  Natural  Gas  Rights,   the
Miscellaneous  Interests and the Tangibles for the remainder of their respective
terms  and all  renewals  or  extensions  thereof  after  Closing,  without  any
interruption of or by the Vendors or any other person (other than the Purchaser)
whomsoever  claiming  or to claim the same or any part  thereof or any  interest
therein by, through or under the Company or the Vendors.

3.14  Material Contracts

(a) Schedule  3.14 is an accurate and complete  list of all Material  Contracts,
other than those described in any other Schedule.  All of the Material Contracts
are in full force and effect,  unamended,  and the Company is not in and has not
received notice of any Material default in respect of any such Material Contract
or commitment by it or any of the parties to any such Material  Contract,  which
default has not been  rectified  as of the date of this  Agreement.  None of the
other parties to any of the Material  Contracts have given notice to the Company
of their intention to terminate or amend any of the Material  Contracts,  except
as specifically contemplated herein.

(b) Except as disclosed in Schedule 3.14, the Company is not a party to any oral
or  written  (i)  confidentiality  or  standstill   agreement,   non-competition
agreement or other Material  agreement or contract which, after giving effect to
the  transactions  contemplated by this Agreement,  purports to restrict or bind
the Company or any of its affiliates or (ii)  collective  bargaining  agreement.
Except as disclosed in the Property Schedule,  the Company is not a party to any
contract or agreement granting a preferential right of purchase or similar right
to any Person with respect to any of the Assets.

                                       




3.15  Litigation

Except as  disclosed in Schedule  3.15,  there is no suit,  action,  litigation,
investigation,  claim, complaint, grievance or proceeding, including appeals and
applications  for review,  in progress  or pending or, to the  knowledge  of the
Company,  threatened,  by or against or  relating  to the  Company or any of its
assets or businesses which, if determined adversely to the Company, would have a
Material  Adverse  Effect.  Except as disclosed in Schedule  3.15,  there is not
presently outstanding against the Company any judgment, decree, injunction, rule
or order of any  court,  governmental  department,  commission,  board,  bureau,
agency or  arbitrator  which  could  reasonably  be  expected to have a Material
Adverse Effect.

3.16  Compliance with Terms

The Company has complied  with,  performed,  observed and  satisfied  all terms,
conditions,  obligations and liabilities  which have arisen prior to the Closing
Date and were the  obligations of the Company under any of the provisions of any
law, statute, order, writ, injunction or decree of any Governmental Authority or
court and in respect of which there could occur a Material Adverse Effect if not
complied with, performed, observed or satisfied.

3.17  Title Documents and Production Sales Contracts

The  Company  has  made  available  for  inspection  by  the  Purchaser  or  its
representatives:

(a)   all documents, instruments, records and books relevant to
title to the Assets and the operation thereof; and

(b) all production  sales contracts and other contracts within the possession or
control of the Company for the sale of Petroleum  Substances  produced  from the
Lands or lands with which the Lands have been pooled or unitized.

3.18  Production and Accounts Receivable

Except for those non-payments which in the aggregate will not exceed $150,000:

(a)  payments  of  production  revenue  and  deliveries  in kind in  respect  of
Petroleum Substances produced from the Lands are being paid or made, as the case
may be, to the Company  consistent with the ordinary practice in the oil and gas
industry; and

(b) the amount of all accounts receivable, unbilled invoices and other debts due
or recorded in the records and books of account of the Company as  reflected  on
the July 31 Balance Sheet are valid, enforceable and collectible and none of the
accounts  receivable  reflected in the July 31 Balance  Sheet are subject to any
counterclaim  or set-off  except to the extent  reflected in the July 31 Balance
Sheet.

                                       






3.19  Employment Matters

The Company does not have any  employees.  The Company has not  established  any
severance,  pension,  retirement or other individual or group employment benefit
plans.

3.20  Employees

Schedule 3.20 is a true and complete list of all  individuals  who are currently
employees  of  Morrison  and who are  employed  full-time  by  Morrison  so that
Morrison can perform its services under the Morrison Agreements.

3.21  Insurance

Schedule 3.21 sets forth a true and complete list and brief summary of the terms
of all of the  Company's  insurance  policies (in this Section  3.21,  the "said
documents").  The Company  maintains or causes to be maintained such policies of
insurance, issued by responsible insurers, as are appropriate to its operations,
property and assets,  in such amounts and against such risks as are  customarily
carried and insured against by owners of comparable  operations,  properties and
assets. All of the said policies are in full force and effect and the Company is
not in default,  as to the payment of premium or  otherwise,  under the terms of
any such  policy.  None of the said  policies  contains a provision  whereby the
insurer is entitled to terminate the said policy  because of the sale of control
of the Company pursuant to this Agreement.

3.22  Copies of Agreements etc.

A current and complete copy of each of the  contracts,  commitments,  mortgages,
leases,  instruments  and other  documents  identified in the Schedules (in this
Section 3.22, the "said  documents"),  including the Material  Contracts and all
amendments  thereto,  has been made  available for  inspection by the Purchaser.
There are no  negotiations  presently  occurring  with  respect to the  renewal,
repudiation  or  amendment  of any of the said  documents or any of the Material
Contracts.

3.23  Bank Accounts, etc.

Schedule 3.23 sets forth:

      (a) the name of each  bank and other  depository  with  which the  Company
maintains any bank account,  trust account or safety  deposit box, the number of
each such account and the names of all Persons authorized to draw thereon or who
have access thereto; and

      (b)   the names of all Persons, if any, holding powers of

                                       




attorney from the Company and a summary statement of the terms
thereof.

3.24  Corporate Records and Minute Books

The corporate  records and minute books of the Company have been made  available
to the  Purchaser at the offices of BJV or the Company and include  complete and
accurate  minutes of all  meetings  of the  directors  and  shareholders  of the
Company held to date and all consent  resolutions  passed by the  directors  and
shareholders,  since the date of its incorporation.  The share certificate book,
register  of  shareholders,  register of  transfers  and  register of  directors
included therein of the Company, are complete and accurate. All of the corporate
records  and  minute  books of the  Company  which  have been  furnished  to the
Purchaser for it to review  accurately  record all Material  transactions of the
Company in all respects and have been maintained consistently in accordance with
good business practices.

3.25  Environmental Matters

Except  as  disclosed  in  Schedule  3.25  or in any of the  reports  and  other
documents described in Schedule 3.25:

(a)   all Environmental Approvals in the possession of the
Company:

      (i)   which are material to the continued operation of Major
Facilities operated by the Company;

      (ii)  which relate to any abandonment, reclamation, work or
remediation obligation of the Company; or

      (iii)       which relate to any Major Facilities not operated
by the Company and which are in the possession of the Company

have been made available to the Purchaser at the Company's
Calgary office for inspection and review by the Purchaser;

(b)  the  Company  and its  operations  and its  Assets  are (1) in  substantial
compliance with all Environmental Laws, (2) are not the subject of any remedial,
preventative  or  control  action,   direction  or  order  by  any  Governmental
Authorities, or any investigation or evaluation by any Governmental Authorities,
as to whether  any  remedial or  preventative  action is needed to respond to an
existing or potential Environmental concern and (3) there is no reasonable basis
for any Person to assert that the Company is liable to any Person as a result of
the  release of any  Substance  into the  Environment  or into any  facility  or
structure;

(c) the Company has made available,  for inspection and review by the Purchaser,
all audits, reports and assessments in respect of Environmental matters relating
to the Assets operated by the Company,  and all audits,  reports and assessments
relating to other Assets, to the extent that the audits, reports and assessments

                                       
 



are within the possession or control of the Vendors or the Company; and

(d) all Environmental Approvals, if any, required to be obtained, held, or filed
by the  Company in  connection  with any aspect of the  business  of the Company
including  those  related to the  treatment,  storage,  disposal or release of a
hazardous  substance,  which  relate to any  abandonment,  reclamation,  work or
remediation  obligation of the Company,  and which are material to the continued
operation of the Assets, have been duly obtained, held or filed and remain valid
and in effect and the Company is in  substantial  compliance  with all terms and
conditions of all such Environmental Approvals;

Notwithstanding any other provision of this Agreement,  this Section 3.25 is the
sole  representation  and warranty of the Company with respect to  Environmental
matters and no other representations or warranties shall be interpreted so as to
apply to,  contemplate or deal with any matter relating to the Environment.  For
the  purposes of this  Section  3.25,  "substantial  compliance"  means that the
aggregate   direct  cost  of  compliance   with   Environmental   Laws  and  the
Environmental  Approvals  referred  to in  Section  3.25(d),  other  than  those
disclosed in Schedule 3.25, would not exceed in the aggregate $1 million.

3.26  No Production Penalties

None of the Wells has been  overproduced such that it is subject to a production
penalty  or  limitation  which  will  result  in it  being  shut in or have  its
production  curtailed,  except  for any such  penalties  which  would not in the
aggregate have a Material  Adverse Effect on the Company or which are of general
application to producing wells in Alberta and any such penalties and limitations
which have resulted from  circumstances  where good oil and gas field  practices
have been  followed  (and  penalties  and  limitations  which  result from prior
production  in excess of  allowables  shall be deemed not to have arisen in such
circumstances).

3.27  No Excess Gas Deliveries

The Company has not  received  notice from a purchaser  of natural gas  produced
from the  Petroleum  and  Natural  Gas Rights  asserting  that the  Company  has
delivered  to such  purchaser  an annual  amount of natural gas in excess of the
amount  which the Company was  entitled to deliver to the  particular  purchaser
under the applicable gas purchase contract.

3.28  Prepaid Gas Obligations

The Company is not obligated by virtue of a prepayment or similar arrangement to
deliver Petroleum  Substances without then or thereafter  receiving full payment
therefor.

                                       




3.29  Royalty Payments

All Royalties have been properly and timely paid to the Crown, lessors and other
holders of the  Royalties  with respect to all  production or sales of Petroleum
Substances  from the Petroleum and Natural Gas Rights and all filings in respect
of such  Royalties  have been properly made in  accordance  with the  applicable
legislation or agreements.

3.30  Gas Balancing Agreements

The Company is not party to any gas balancing agreements.

3.31  Production Sale Contracts

Except for those  contracts  described in Schedule 3.31 and contracts  which are
terminable on not more than 60 days'  notice,  none of the Petroleum and Natural
Gas Rights are  dedicated  or  otherwise  subject  to any  contractual  or other
arrangement for the sale,  processing or transportation of Petroleum  Substances
produced  therefrom  (or otherwise  related to the  marketing of such  Petroleum
Substances) which would bind the Company or would otherwise  restrict the rights
of the Company to take possession of and market such Petroleum Substances.

3.32  Partnerships

None of the Petroleum and Natural Gas Rights is subject to any tax or common law
partnership  (other  than  any  Permitted  Encumbrances)  except  for  any  such
partnership  created under a joint  operating or similar  agreement to which the
Company is party.

3.33  Capacity

Subject  to  contractual  and  regulatory  restrictions,  all  Wells  which  are
currently  producing  natural  gas in paying  quantities  (which for  clarity is
agreed to  exclude  Wells  which are  abandoned,  capped or shut in or which are
being  produced for test purposes  only) are connected to a gathering  system of
sufficient capacity to permit the continuing delivery of Petroleum Substances in
accordance  with  the  Company's  contractual   obligations  to  buyers  of  its
production for the reasonably foreseeable future.

3.34  Capital Expenditures

Except as  disclosed in or permitted by Schedule 3.6 and subject to Section 8.1,
the Company has not made any oral or written commitments or agreement to acquire
any  assets  (including  under  circumstances  where such  acquisition  would be
classified as a capital expenditure under Canadian generally accepted accounting
principles consistently applied) or make any capital expenditure or contribution
in any individual transaction or project

                                       




including the drilling, recompletion, reworking, plugging back or abandonment of
any Wells where the purchase price, capital expenditure or contribution required
of the Company,  directly or indirectly,  exceeds $250,000 or in transactions or
projects where the aggregate purchase price, capital expenditure or contribution
exceeds $2 million.

3.35  Engineering Report

In connection with the preparation of the  Engineering  Report,  the Company has
provided to Sproule Associates Limited ("Sproule") all information  requested by
Sproule  which was in the  possession  of the  Company  and would be of Material
relevance to the preparation of the Engineering Report. All such information was
Materially true and complete and did not omit any  information  required to make
it Materially  true and complete  (except for  information  already in Sproule's
possession or publicly available to Sproule).

3.36  [Intentionally Omitted]

3.37  No Business in the United States

All of the Assets and the Excluded  Assets are located outside the United States
and the Company  has not made  aggregate  sales in or into the United  States of
U.S. $25 million or more in the fiscal year ending October 31, 1995.

3.38  Due Authorization

The Company has all  necessary  power  (corporate or  otherwise),  authority and
capacity  to  enter  into  this  Agreement  and  to  carry  out  its  respective
obligations  under this Agreement.  The execution and delivery of this Agreement
and the  consummation  of the  transactions  contemplated in this Agreement have
been duly  authorized  by all necessary  action  (corporate or otherwise) on its
part.

3.39  Enforceability of Obligations

This  Agreement   constitutes  the  Company's   valid  and  binding   obligation
enforceable   against  the  Company  in  accordance   with  the  terms  of  this
Agreement,asubject,  however, to limitations with respect to enforcement imposed
by law in connection  with  bankruptcy or similar  proceedings and to the extent
that equitable  remedies such as specific  performance and injunction are in the
discretion of the court from which they are sought.

3.40  Consents, Approvals or Authorizations

Except for the AEUB  Approval or as otherwise  obtained,  no consent,  approval,
order or authorization of, filing or registration  with, or notification to, any
Governmental Authority or regulatory authority, or consent, approval, order or

                                      




authorization  of any  Person  (except  those  that  may  not  be  unnecessarily
withheld),  is  required  on its behalf in  connection  with the  execution  and
delivery of this Agreement by the Company or the completion of the  transactions
contemplated by this Agreement.

3.41  Finders' Fees

Except for  finders'  fees which are to be  deducted  in  calculating  the Nevis
Proceeds,  the Company has not incurred any liability,  contingent or otherwise,
for brokers' or finders' fees in respect of the transactions contemplated herein
for which the Company or the Purchaser shall have any responsibility.

Each of the Vendors,  separately  as to itself,  makes the  representations  and
warranties set forth in section 3.42 to 3.46 inclusive to the Purchaser.

3.42  Formation of the Vendors; Title to the Purchased Shares

Other  than  Feshbach  and  Lynch,  each  of  whom  is  an  individual,  it is a
corporation, partnership or trust duly incorporated or otherwise formed, validly
existing  and in  good  standing  under  the  laws  of the  jurisdiction  of its
formation.  It or he is  the  beneficial  owner,  and  will  at  Closing  be the
beneficial and  registered  owner,  of the number of Purchased  Shares set forth
opposite its name in Schedule 1.1(c) free and clear of all  Encumbrances  (other
than the rights of the Purchaser under this  Agreement).  As at the date of this
Agreement,  it or he is the beneficial  owner of the principal amount of the Old
Debentures  set forth  opposite  its name in Schedule  1.1(c).  It or he will at
Closing be the beneficial and  registered  owner of the principal  amount of the
Debentures in Canadian  dollars  equivalent to the amount set forth opposite its
or his name in Schedule  1.1(c)  plus  interest  accrued  but unpaid  thereon as
contemplated  in  the  definition  of  "Debentures",   free  and  clear  of  all
Encumbrances  (other than the rights of the Purchaser  under this Agreement) and
the Old  Debentures  held by it or him will have been  canceled  and the Company
will have no liability,  obligation or duty with respect thereto.  It or he will
deliver to the Purchaser on Closing good,  valid and marketable  title to all of
such Purchased  Shares free and clear of all  Encumbrances and has the exclusive
right to dispose of such  Purchased  Shares  provided  in this  Agreement.  Such
disposition will not violate, contravene,  breach or offend against or result in
any  default  under  any  indenture,  mortgage,  lease,  agreement,  obligation,
instrument,  charter or by-law provision,  statute, regulation, order, judgment,
decree, licence, permit or law to which it or he is party or subject or by which
it is bound or affected (other than any such violation,  contravention,  breach,
offence or default which will not have a Material Adverse Effect).




                                       


3.43  Due Authorization

It or he has  all  necessary  power  (corporate  or  otherwise),  authority  and
capacity to enter into this  Agreement  and to carry out its  obligations  under
this   Agreement.   The  execution  and  delivery  of  this  Agreement  and  the
consummation of the  transactions  contemplated in this Agreement have been duly
authorized by all necessary action (corporate or otherwise) on its or his part.

3.44  Enforceability of Obligations

This Agreement  constitutes its or his valid and binding obligation  enforceable
against it in accordance with the terms of this Agreement,asubject,  however, to
limitations  with  respect  to  enforcement  imposed by law in  connection  with
bankruptcy or similar proceedings and to the extent that equitable remedies such
as specific  performance  and injunction are in the discretion of the court from
which they are sought.

3.45  Consents, Approvals or Authorizations

Except for the AEUB  Approval or as otherwise  obtained,  no consent,  approval,
order or authorization of, filing or registration  with, or notification to, any
Governmental Authority or regulatory authority, or consent,  approval,  order or
authorization  of any  Person  (except  those  that  may  not  be  unnecessarily
withheld), is required on its or his behalf in connection with the execution and
delivery  of  this  Agreement  by it  or  the  completion  of  the  transactions
contemplated by this Agreement.

3.46  Finders' Fees

Except for  finder's  fees which are to be  deducted  in  calculating  the Nevis
Proceeds,  it has not incurred  any  liability,  contingent  or  otherwise,  for
brokers' or finders' fees in respect of the transactions contemplated herein for
which the Company or the Purchaser shall have any responsibility.

Without limiting Section 1.3:

(a)   except only to the extent of the representations and
warranties set forth in this Agreement:

      (i) the Company and the Vendors  negate and disclaim  representations  and
warranties  at any time or times  made  orally or in  writing  and  directly  or
indirectly concerning the transactions provided for in this Agreement, including
those in any  information  or advice  provided to the  Purchaser by any officer,
shareholder,  director,  employee,  agent,  consultant or  representative of the
Company or the Vendors (including Jefferies); and

(ii) the Company and the Vendors make no representation  or warranty,  and shall
have no liability,  directly or indirectly in respect of the Company's  title in

                                       





or to or Encumbrances  against any Petroleum and Natural Gas Rights or as to the
Environmental  condition of the Assets, the Environment,  Environmental matters,
the effect of any of the Assets on the Environment,  Environmental  Approvals or
Environmental Laws; and

(b)  notwithstanding  anything to the contrary in Article 3 or elsewhere in this
Agreement,  the Vendors make no representations  or warranties  whatsoever other
than those  expressly  set forth in  Sections  3.42 to 3.46  inclusive,  and the
Vendors and the Company make no  representations or warranties and shall have no
liability  directly or indirectly in respect of or which  contemplate  or relate
to:

      (i)   the quantity, quality, recoverability or deliverability
of reserves of Petroleum Substances attributable to the Petroleum
and Natural Gas Rights;

      (ii)  any geological or other interpretations or economic
evaluations of any Petroleum and Natural Gas Rights;

      (iii)       the condition, fitness or merchantability of any
of the Assets;

      (iv) the value of any  Petroleum  and  Natural Gas  Rights,  estimates  of
prices  or future  cash  flows  arising  from the sale of  Petroleum  Substances
attributable  to any  Petroleum  and  Natural  Gas  Rights,  estimates  of other
revenues   attributable   to  the  Petroleum  and  Natural  Gas  Rights  or  the
availability or continued  availability of transportation to sell such Petroleum
Substances.

The Purchaser  acknowledges  and  confirms,  without  diminishing  the force and
effect  of  the  express  representations  and  warranties  herein  and  in  the
Schedules, that:

(c) it has inspected, or has been given a reasonable and adequate opportunity to
inspect, the Assets and their physical and Environmental condition and performed
its own due  diligence  and has not relied  directly or  indirectly on any data,
information  or advice  from or on behalf of the  Company or the Vendors in that
regard in connection with the transactions provided for in this Agreement; and

(d) in agreeing to enter into and complete the transactions provided for in this
Agreement,  and in completing such  transactions,  it has relied solely upon its
own engineering and other evaluations, assessments, inspections and projections,
without any direct or indirect involvement of or on behalf of the Company or the
Vendors.

UCC  DISCLAIMER:  EXCEPT FOR THE  REPRESENTATIONS  AND  WARRANTIES  PROVIDED  IN
ARTICLE 3, THE  COMPANY AND THE  VENDORS  MAKE NO  WARRANTY  OR  REPRESENTATION,
EXPRESS,  STATUTORY  OR  IMPLIED,  AS TO  (I)  THE  ACCURACY,  COMPLETENESS,  OR
MATERIALITY OF ANY DATA,  INFORMATION  OR RECORDS  FURNISHED TO THE PURCHASER IN

                                      




CONNECTION  WITH THE  ASSETS;  (II) THE  QUANTITY,  QUALITY,  RECOVERABILITY  OR
DELIVERABILITY OF RESERVES OF PETROLEUM SUBSTANCES ATTRIBUTABLE TO THE PETROLEUM
AND NATURAL GAS RIGHTS; (III) THE ABILITY OF THE ASSETS TO PRODUCE HYDROCARBONS,
INCLUDING WITHOUT  LIMITATION  PRODUCTION RATES,  DECLINE RATES AND RECOMPLETION
OPPORTUNITIES;  (IV) GAS BALANCING  INFORMATION,  ALLOWABLES OR OTHER REGULATORY
MATTERS,  (V) THE PRESENT OR FUTURE VALUE OF THE  ANTICIPATED  INCOME,  COSTS OF
PROFITS,  IF ANY,  TO BE  DERIVED  FROM THE  ASSETS,  OR (VI) THE  ENVIRONMENTAL
CONDITION  OF THE  ASSETS.  ANY AND  ALL  DATA,  INFORMATION  OR  OTHER  RECORDS
FURNISHED  BY THE  COMPANY OR THE VENDORS ARE  PROVIDED  TO THE  PURCHASER  AS A
CONVENIENCE  AND  THE  PURCHASER'S  RELIANCE  ON OR USE OF  THE  SAME  IS AT THE
PURCHASER'S SOLE RISK.


ARTICLE 4
REPRESENTATIONS AND WARRANTIES OF ABRAXAS AND THE PURCHASER

Abraxas  and  the  Purchaser  hereby  make  the  following  representations  and
warranties to the Company and the Vendors.

4.1   Incorporation

Abraxas and the Purchaser are corporations duly incorporated, organized, validly
existing and in good standing  under the laws of the State of Nevada and Canada,
respectively.

4.2   Due Authorization

Abraxas and the Purchaser  have all  necessary  corporate  power,  authority and
capacity to enter into this Agreement and to carry out their  obligations  under
this respective Agreement.  The execution and delivery of this Agreement and the
consummation of the  transactions  contemplated in this Agreement have been duly
authorized  by all  necessary  corporate  action on the part of Abraxas  and the
Purchaser.

4.3   Enforceability of Obligations

This  Agreement  constitutes  a valid and binding  obligation of Abraxas and the
Purchaser  enforceable  against Abraxas and the Purchaser in accordance with the
terms of this  Agreement,  subject,  however,  to  limitations  with  respect to
enforcement  imposed by law in connection with bankruptcy or similar proceedings
and to the extent  that  equitable  remedies  such as specific  performance  and
injunction are in the discretion of the court from which they are sought.

4.4   Absence of Conflicting Agreements

The execution and delivery of this Agreement does not, and the  consummation  of
the transactions  contemplated  hereby and compliance with the provisions hereof
will not constitute a Violation by Abraxas or the Purchaser under or pursuant to
any provision of:

                                       






(a) the  Articles of  Incorporation,  as amended,  or  By-laws,  as amended,  of
Abraxas or the  Purchaser (a true and  complete  copy of each of which as of the
date hereof has been delivered to the Representative);

(b) any contract,  agreement,  loan or credit agreement,  note, bond, debenture,
mortgage,   indenture,   lease,   employee  benefit  plan  or  other  agreement,
obligation,  instrument, permit, concession, franchise, or license applicable to
Abraxas or the  Purchaser (a true and  complete  copy of each of which as of the
date hereof has been delivered to the Representative); or

(c) any judgment,  injunction,  order, decree, statute, law, ordinance,  rule or
regulation  applicable to Abraxas or the Purchaser or their respective  property
or assets.

4.5   Consents, Approvals or Authorizations

Except  in  connection  with  the  AEUB  Approval,   no  consent,   approval  or
authorization  of,  filing  or  registration   with,  or  notification  to,  any
governmental or regulatory  authority or consent,  approval or  authorization of
any Person, is required on behalf of Abraxas or the Purchaser in connection with
the execution and delivery of this  Agreement by it or the  consummation  of the
transactions contemplated by this Agreement.

4.6   Finders' Fees

Neither  Abraxas nor the  Purchaser  has incurred any  liability,  contingent or
otherwise,  for  brokers'  or  finders'  fees  in  respect  of the  transactions
contemplated  herein  for  which  the  Company  or the  Vendors  shall  have any
responsibility.

4.7   Independent Evaluation

Abraxas and the Purchaser are experienced and knowledgeable investors in the oil
and gas business. Abraxas and the Purchaser have been advised by and have relied
solely on their own expertise and legal,  tax,  reservoir  engineering and other
professional counsel concerning this transaction,  the Securities and the Assets
and the value  thereof,  as  determined  by their  examination  of the Company's
records and inspection of the Company,  the  Securities and the Assets,  and the
representations, warranties and covenants made by the Company and the Vendors in
this Agreement.

4.8   Eligibility

The Purchaser is eligible under the Regulations to own the Purchased Shares.


                                       




4.9   Securities Laws

The Purchaser is acquiring the Purchased Shares as principal for its own account
for the purpose of  investment  and not with a view to or for sale in connection
with any distribution thereof


ARTICLE 5
SURVIVAL

5.1   Nature and Survival

(a) Subject to the limitations set forth in Section 5.1(b), the representations,
warranties, indemnities and covenants contained in Sections 2.3, 8.1 and 8.4 and
Articles 1, 3, 4, 9, 10, 11 and 13 of this Agreement  shall survive the Closing,
the execution and delivery of any transfer  instruments  and other  documents of
title  to the  Purchased  Shares  and any  other  agreements,  certificates  and
indemnities under this Agreement and the payment of the Purchase Price.

(b) The representations and warranties concerning tax matters set out in Section
3.9, the  representation  and warranty set forth in Section 3.29,  insofar as it
concerns Royalties (herein "Alberta Crown Royalties") payable to Her Majesty the
Queen in right of the Province of Alberta,  and the  provisions  of Section 9.6,
the covenants,  agreements and indemnities related thereto and the covenants set
forth in Article 10 shall  survive for a period of 1 year from the Closing Date.
All other representations,  warranties,  indemnities and covenants shall survive
for a period of 6 months from the Closing Date. If no Contractual Claim has been
made under this Agreement in accordance with the applicable provision in Section
9.1, prior to the expiry of the applicable survival period provided for, against
a Party for any  incorrectness or breach of any  representation or warranty made
in, or breach of any covenant, agreement or indemnity in, this Agreement by such
Party,  such Party  shall  have no further  liability  under this  Agreement  or
otherwise with respect to such  representation  or warranty.  If Closing occurs,
none of the  Parties  shall  have any claim or remedy in  respect  of any of the
representations,  warranties,  covenants and indemnities set forth herein or any
agreement,  certificate or document delivered pursuant hereto except as provided
in Article 9.

(c) The  provisions of Sections 9.1, 9.2, 9.3 and 9.6 shall survive  Closing for
so long as any  Contractual  Claims  made prior to the expiry of the  applicable
survival period remain unresolved.

5.2   Reliance

No Party shall be entitled to maintain an action after Closing  against  another
Party  in  respect  of any  incorrectness  or  breach  by the  other  Party of a

                                       





representation  or warranty in  Articlea3 or 4, as the case may be, if the Party
asserting  the claim was  actually  aware of the  incorrectness  or breach at or
prior to Closing or if a Purchase Price  adjustment was made pursuant to Section
2.9 in respect of the particular  incorrectness or breach of a representation or
warranty.


ARTICLE 6
PURCHASER'S CONDITIONS PRECEDENT

The obligation of the Purchaser to consummate the  transactions  contemplated by
this Agreement shall be subject to the  satisfaction  of, or compliance with, or
waiver in writing by the Purchaser of, on or prior to the Closing Time,  each of
the following conditions precedent (each of which is acknowledged to be inserted
for the  exclusive  benefit of the Purchaser and may be waived by it in whole or
in part in writing).

6.1   Truth and Accuracy of Representations of Company at the
Closing Time

The  representations  and  warranties  of the Vendors and the Company made in or
pursuant to this  Agreement  shall be  Substantially  true and correct as of the
Closing  Time and with the same  force  and  effect  as if made at and as of the
Closing Time (except as such  representations  and warranties may be affected by
the occurrence of events or transactions expressly contemplated and permitted by
this Agreement or as consented to in writing by the Purchaser) and the Purchaser
shall  have  received  a  certificate  of the  Company  to the  effect  that its
representations  and  warranties  are true and  correct as of the  Closing  Time
except as aforesaid in this Section 6.1 and except to the extent that a Purchase
Price adjustment has been made as contemplated in Section 2.9.

6.2   Performance of Obligations

The Vendors and the Company  shall have  performed or complied with all of their
obligations,  covenants and agreements under this Agreement. The Purchaser shall
have received a  certificate  of the Company to the effect that it has performed
or complied with all of its  obligations,  covenants and  agreements  under this
Agreement.

6.3   Receipt of Closing Documentation

All  documentation  relating to the due authorization and completion of the sale
and purchase of the  Purchased  Shares and the  termination  of the Option under
this Agreement and all actions and proceedings  taken on or prior to the Closing
in  connection  with the  performance  by the  Company  and the Vendors of their
respective  obligations  under  this  Agreement  shall  be  satisfactory  to the
Purchaser  (acting  reasonably)  and the Purchaser shall have received copies of
all such  documentation or other evidence as it may reasonably  request in order

                                      





to establish the consummation of the transactions contemplated by this Agreement
and  the  taking  of  all  corporate  proceedings  in  connection  therewith  in
compliance with these  conditions,  in form (as to certification  and otherwise)
and substance satisfactory to the Purchaser acting reasonably.

6.4   Consents, Authorizations and Registrations

All material consents,  approvals,  orders,  authorizations and confirmations of
any Persons and Governmental  Authorities  including without limitation the AEUB
Approval (or  registrations,  declarations,  filings or recordings with any such
authorities) which are reasonably  required in connection with the completion of
the  transactions  contemplated  by  this  Agreement  or the  execution  of this
Agreement shall have been obtained on or before the Closing Time.

6.5   [Intentionally Omitted]


6.6   Agreements Terminated

The Option Agreement,  the Investors'  Agreements and the Management  Agreements
shall  have  been  terminated  and all sums due and owing  under the  Investors'
Agreements and the Management Agreements shall have been paid in full.

6.7   Closing Opinion

The Purchaser  shall have received an opinion from BJV and an opinion from legal
counsel for each of the Vendors who is not an individual, each dated the Closing
Date,  substantially  in  the  forms  attached  as  Schedule  6.7  (a)  and  (b)
respectively.

6.8   Title Opinion Update

The Purchaser  shall have  received  from BJV an opinion  updating the BJV Title
Opinion in the form of Schedule 6.8.

6.9   Financing

The Purchaser shall have obtained financing on terms and conditions satisfactory
to the Purchaser, in the Purchaser's sole discretion, to consummate the purchase
and sale of the Purchased  Shares and  termination of the Option as contemplated
hereby.

6.10  Officers and Directors

All of the officers and directors of the Company  shall have resigned  effective
as of the Closing Date and shall have  delivered  releases to the Company in the
form of Schedule 6.10.


                                      


6.11  Escrow Agreement

The Vendors,  the  Representative  and the Escrow Agent shall have  executed and
delivered the Escrow Agreement.

6.12  Sale of Excluded Assets

The sale of the Excluded  Assets to Morrison and the  assumption of the Excluded
Liabilities  by  Morrison  shall  have  been  completed  pursuant  to the  Nevis
Agreement.

6.13  Termination Agreements and Transition Agreement

The Termination  Agreements and all of the releases provided for therein and the
Transition Agreement shall have been executed and delivered.

6.14  Material Adverse Damage

From  August  1, 1996  until the  Closing  Date,  there  shall not have been any
physical damage to any of the Petroleum and Natural Gas Rights or the Tangibles:

(a)   the uninsured portions of the costs of repair of which will
exceed $3 Million; or

(b) which is insured and not  substantially  repaired  prior to the Closing Date
but the cost of repair of which will exceed $3 Million.

6.15  No Litigation

No action or proceeding  shall have been instituted or, to the best knowledge of
the Company, threatened before a court or other government body or by any public
authority to restrain or prohibit,  or otherwise affect, any of the transactions
contemplated  hereby,  and the Company  shall have  delivered to the Purchaser a
certificate dated as of the Closing Date to that effect.

6.16  Bank Accounts

The  Company  shall have  executed  and  delivered  to the  Purchaser  documents
evidencing  the change of signing  authorities,  in respect of the bank accounts
listed in  Schedule  3.23 to  individuals  identified  by the  Purchaser  to the
Representative not later than three Business Days prior to Closing.

6.17
Debentures

The Debentures  will have been validly issued in full and complete  satisfaction
of all of the issued and  outstanding  Old Debentures  pursuant to the Debenture
Prepayment  Agreement  and the  Debentures  shall  have  been  delivered  to the
Representative  in  accordance  with  Section  8.5.  If  any  of  the  foregoing

                                      





conditions  in this  Article,  which are for the sole benefit of the  Purchaser,
have not been  fulfilled and  performed by Closing,  the Purchaser may terminate
this Agreement by notice in writing to the Company and the Vendors. However, the
Purchaser may in writing waive  compliance  with any  condition,  in whole or in
part, if it sees fit to do so, without prejudice to its rights of termination in
the event of nonfulfillment  of any other condition,  in whole or in part, or to
its rights to recover  damages for the breach of any  representation,  warranty,
covenant or condition contained in this Agreement,  whether or not it terminates
this Agreement.



ARTICLE 7
VENDORS' CONDITIONS PRECEDENT

The obligation of the Vendors to consummate  the  transactions  contemplated  by
this Agreement shall be subject to the  satisfaction  of or compliance  with, or
waiver in writing by all of the  Vendors  of, on or prior to the  Closing  Time,
each of the following  conditions precedent (each of which is acknowledged to be
inserted for the  exclusive  benefit of the Vendors and may be waived by them in
whole or in part).

7.1   Truth and Accuracy of Representations of Purchaser at
Closing Time

The  representations  and  warranties  of Abraxas and the  Purchaser  made in or
pursuant to this  Agreement  shall be  Substantially  true and correct as of the
Closing  Time and with the same  force  and  effect  is if made at and as of the
Closing Time (except as such  representations  and warranties may be affected by
the occurrence of events or transactions expressly contemplated and permitted by
this  Agreement  or as  consented  to in writing by the Vendors) and the Vendors
shall have received a certificate of Abraxas and the Purchaser to that effect.

7.2   Performance of Obligations

Abraxas and the  Purchaser  shall have  performed or complied  with all of their
obligations,  covenants and agreements under this Agreement. The Vendors and the
Company shall have  received a certificate  of Abraxas and the Purchaser to that
effect.

7.3   Receipt of Closing Documentation

All  documentation  relating to the due authorization and completion of the sale
and purchase of the  Purchased  Shares and the  termination  of the Option under
this Agreement and all actions and proceedings  taken on or prior to the Closing
in connection  with the  performance by the Purchaser of its  obligations  under
this Agreement shall be  satisfactory to the Vendor (acting  reasonably) and the
Vendor shall have received copies of all such documentation or other evidence as

                                       





it may  reasonably  request  in  order  to  establish  the  consummation  of the
transactions  contemplated  by this  Agreement  and the taking of all  corporate
proceedings in connection therewith in compliance with these conditions, in form
(as to certification  and otherwise) and substance  satisfactory to the Vendors,
acting reasonably.

7.4   Consents, Authorizations and Registrations

All material consents,  approvals,  orders,  authorizations and confirmations of
any  Persons  and  Governmental  Authorities  including  the AEUB  Approval  (or
registrations,  declarations,  filing or recordings  with any such  authorities)
which  are  reasonably  required  in  connection  with  the  completion  of  the
transactions  contemplated by this Agreement or the execution of this Agreement,
shall have been obtained on or before the Closing Time.

7.5   Closing Opinion

The Vendors  shall have  received an opinion  from BDP and an opinion from Cox &
Smith,  Incorporated,  each dated the Closing Date,  substantially  in the forms
attached as Schedule 7.5(a) and (b) respectively.

7.6   Release of Directors and Officers

The  Purchaser  and the  Company  shall have  delivered  releases in the form of
Schedule  7.6 to and in respect of each of the  Company's  current  officers and
directors.

7.7   Escrow Agreement

The Escrow Agent and the Purchaser  shall have executed and delivered the Escrow
Agreement.

7.8   Representations and Warranties

The  representations  and  warranties  of the Vendors and the Company made in or
pursuant to this  Agreement  shall be  Substantially  true and correct as of the
Closing  Time and with the same  force and  effect as if made as of the  Closing
Time  (except as such  representations  and  warranties  may be  affected by the
occurrence of events or  transactions  expressly  contemplated  and permitted by
this Agreement or as consented to in writing by the Purchaser).

7.9   No Litigation

No action or proceeding  shall have been instituted or, to the best knowledge of
the Company, threatened before a court or other government body or by any public
authority to restrain or prohibit any of the transactions contemplated hereby.


                                       

7.10  Termination Agreements and Transition Agreement

The  Termination  Agreements  and the  releases  provided  for  therein  and the
Transition Agreement shall have been executed and delivered.

7.11  Material Adverse Damage

From  August  1, 1996  until the  Closing  Date,  there  shall not have been any
physical damage to any of the Petroleum and Natural Gas Rights or the Tangibles,
the uninsured portions of the cost of repair of which will exceed $3 Million.

If any of the  foregoing  conditions  in this  Article,  which  are for the sole
benefit of the Vendors,  have not been  fulfilled  or performed by Closing,  the
Vendors may  terminate  this  Agreement  by notice in writing to the  Purchaser.
However,  the Vendors may in writing waive  compliance  with any  condition,  in
whole or in part, if they see fit to do so,  without  prejudice to its rights of
termination in the event of nonfulfillment of any other condition in whole or in
part or to its rights to recover  damages for the breach of any  representation,
warranty,  covenant or condition contained in this Agreement,  whether or not it
terminates this Agreement.


ARTICLE 8
INTERIM PERIOD

8.1   Conduct of Business Prior to Closing

(a)   During the Interim Period, the Company shall:

      (i) except as otherwise expressly permitted by this Agreement, conduct the
Company's  businesses  in the ordinary and usual course and in  accordance  with
good industry practice, and shall not:

                  (A) without the prior written  consent of the Purchaser,  make
or commit to any single  expenditure in excess of $250,000  (except in the event
of a catastrophe or other event endangering life or property); or

                  (B) enter into any  transaction  which if effected  before the
date  of  this  Agreement  would  constitute  or  result  in  a  breach  of  the
representations, warranties or agreements contained in this Agreement;

      (ii)  continue in full force and effect all existing policies
or insurance presently maintained or caused to be maintained by
the Company; and

      (iii)       comply with all laws affecting the operation of
its business and pay all required Taxes and installments of
Taxes;


                                       




      (iv) to the extent that the nature of its interests in the Assets permits,
maintain and keep the Assets in good condition and working order, preserving the
Assets in full force and effect and  performing  all  covenants  and  conditions
imposed upon the Company  including,  but not limited to,  payment of royalties,
delay  rentals,  shut-in gas royalties and any and all other  required  payments
(except  those held in suspense  in good faith by the Company for a  justifiable
purpose);

      (v) to the extent that the nature of its interests in the Assets  permits,
operate or cause to be operated the Wells or any unit of which any of the Assets
are a part in a good and workmanlike  manner in accordance with the terms of the
respective applicable operating agreements and good industry practices;

      (vi)  timely perform all of its obligations under the
Material Contracts;

      (vii) exercise due diligence in safeguarding  and  maintaining  secure and
confidential all geological and geophysical maps,  confidential  reports and all
other confidential data in its possession relating in any way to the Assets;

      (viii)      maintain the Company's Articles of Incorporation
and By-Laws in their form on the date of this Agreement,

      (ix) maintain the compensation payable or to become payable by the Company
to any officer, employee or agent at their levels on the date of this Agreement,

      (x) except for the sale of the  Excluded  Assets,  preserve  the  business
organization of the Company,  keep available to Purchaser the Company's officers
and agents and preserve its present business relations with suppliers, customers
and others  and shall not commit any act or any way assist  others to commit any
act which will injure the Company or the business of the Company.

and except as otherwise provided or disclosed in this Agreement the Company will
not,  without  the  Purchaser's  prior  written  consent,  which  shall  not  be
unreasonably withheld or delayed:

      (xi)  surrender or abandon any of the Assets or amend any
agreement or contract relating to the Assets; or

      (xii) sell,  transfer or dispose of, or grant a security interest in or in
respect of, all or any part of or any  interest  in the  Assets,  except for the
sale (in the ordinary  course of business  pursuant to contract,  terminable  on
notice of not more  than (60 days) of  Petroleum  Substances  produced  from the
Lands.

(xiii) make any bonus,  pension,  retirement or insurance payment or arrangement
to or with any such persons except those that may have already been accrued, and
bonus and insurance  payments in the ordinary  course of business and consistent

                                       





with the past practice of the Company;

      (xiv)       issue, sell or otherwise dispose of its capital
stock or any right or option to acquire any shares of its capital
stock;

      (xv) declare or pay any dividend or make any other distribution or payment
in respect of its capital stock or redeeming,  purchasing or otherwise acquiring
or agreeing to redeem, purchase or acquire any of its capital stock;

      (xvi)       create, incur, or assume any long-term or
short-term debt whether for money borrowed or otherwise;

      (xvii)      assume, guarantee, endorse or otherwise become
liable or responsible for the obligation of any other Person;

      (xviii)  make  any  loans,   advances  or  capital  contributions  to,  or
investments  in, any other  Person,  prepay any interest  payable  under the Old
Debentures or the Debentures  (other than to the extent that the issuance of the
Debentures  constitutes a prepayment of interest  under the Old  Debentures)  or
distribute any insurance proceeds or the Nevis Proceeds to any shareholders;

      (xix)       make any change affecting any bank, safe deposit
or power of attorney arrangements of the Company;

      (xx)  waive, compromise or settle any material right or claim
of the Company;

      (xxi)       enter into any forward, future, swap or hedging
contract that burdens the Assets or production therefrom; or

      (xxii)      amend or modify any of the Material Contracts, the
Option Agreement, the Nevis Agreement, the Old Debentures, the
Debentures or the Termination Agreements;

The  Purchaser  will  respond to all written  requests  for  consent  under this
Section  8.1(a) with  reasonable  promptness,  and within such  reasonable  time
period as the Company or the Vendors may specify to enable a timely  reply to be
given to any third party. If the Purchaser does not respond within any such time
period specified by the Company or Vendors, the Company and the Vendors shall be
entitled to carry out the action described in the request, so long as the action
is consistent with proper business practices.

(b) The Purchaser  acknowledges  that an operation may be proposed pursuant to a
facilities,  unit,  unit  operating  or other  agreement  and may  proceed  if a
majority,  but not  all,  of the  owners  of the  particular  facility,  unit or
property  vote in  favour  thereof,  and  that the  owners  voting  against  the
operation will nevertheless be obliged to pay for their respective proportionate
shares of the costs of the  operation.  When the  Company  is  required  by this

                                       
 




Section to obtain the written consent of the Purchaser in respect of any capital
expenditure  which is subject to such a vote, the Company will vote in favour of
the particular  expenditure  unless the Purchaser  instructs the Company to vote
against it. If the  particular  expenditure is approved of and proceeded with in
accordance with the applicable  agreement  notwithstanding  that the Company may
have  voted  against  the   particular   expenditure,   the   Purchaser   shall,
notwithstanding  its  refusal to consent to the  expenditure,  be deemed to have
consented to it.

(c) If, having been given a written  request for consent as  contemplated in the
last paragraph of Section 8.1(a) and a reasonable  time period to respond to the
said  request  having  regard to the time period  within  which a reply is to be
given to the relevant  third party,  the  Purchaser  fails or refuses to consent
pursuant  to this  Section  8.1 to an  expenditure  necessary  to  preserve  the
existence of any of the Leases and, as a  consequence,  any of the Leases or the
interest of the Company  therein is terminated or  surrendered or deemed to have
been  terminated  or  surrendered,  the  Purchase  Price shall not be reduced on
account of the  termination or surrender nor shall the termination or surrender,
without  more,  constitute  a  breach  or  failure  of the  representations  and
warranties of the Company relating thereto or of the Company's title thereto.

(d) The Company shall give prompt  written notice to the Purchaser of any notice
or claim,  written  or oral,  of  default  or breach by the  Company,  or of any
termination or cancellation  (or threat of any of the same,  whether disputed or
denied by the Company)  received or given by the Vendors or the Company prior to
Closing  under any  instrument  or agreement  affecting  the Assets to which the
Company is a party or by which it or any of the Assets is bound.

(e) Except with  respect to the  transactions  contemplated  by this  Agreement,
during the period  from the date of this  Agreement  to the  Closing  Date,  the
Vendors shall not take, and shall cause the Company to refrain from taking,  any
action to, directly or indirectly,  encourage, initiate or engage in discussions
or  negotiations  with, or provide any  information  to, any Person,  other than
Purchaser,  concerning any purchase of the Securities,  or any part thereof,  or
any  merger,  sale of all or  substantially  all of the assets of the Company or
similar transaction involving the Company.

(f) Except  with  respect to the  transaction  contemplated  by this  Agreement,
during the period  from the date of this  Agreement  to the  Closing  Date,  the
Vendors shall not sell, transfer, dispose of, or grant a security interest in or
in respect of, all or any part of the  Purchased  Shares,  the  Option,  the Old
Debentures or the Debentures.



                                      



8.2   Access for Investigation

(a) For the purpose of  permitting  the Purchaser to  investigate  the business,
properties and assets of the Company, but subject to confidentiality obligations
of the Company or the Vendors to other  Persons,  the Company  shall  permit the
Purchaser  and  its   representatives,   during  the  Interim  Period,   without
interference  to the ordinary  conduct of the  business of the Company,  to have
reasonable  access during normal business hours and on reasonable  notice to the
premises and to all the books,  accounts,  records and other data of the Company
within the  possession  or control of the Company.  The Company shall furnish to
the  Purchaser  such  financial and operating  data and other  information  with
respect to the business,  properties  and assets of the Company as the Purchaser
shall from time to time reasonably  request.  The right of the Purchaser to have
access to the Assets shall be subject to any contractual  restrictions  thereon.
The Company  shall  cooperate  with the  Purchaser in  attempting to secure such
access from other Persons.  The Purchaser  shall repair any damage to the Assets
resulting from its inspection  thereof and shall indemnify and save harmless the
Company and the Vendors from and against any Claims arising as the result of the
Purchaser conducting such inspection.

(b) In  particular,  without  limiting the  generality  of Section  8.2(a),  the
Company shall make the Material  Contracts,  the Leases and all  agreements  and
other  documents  and   correspondence,   including  title  opinions  previously
prepared,  relating to title to the Assets, and all financial,  tax, accounting,
well, production and operating data and records of the Company, available to the
Purchaser  and its  representatives  at the  offices  of the  Company  for  such
inspection and review as the Purchaser reasonably requires.

8.3   Actions to Satisfy Closing Conditions

Each of the Parties  agrees to take all such  actions as are within its power or
control,  and to use its best efforts,  to cause other actions to be taken which
are not within its power or control, so as to ensure compliance with each of the
conditions  and  covenants  set forth in  Articles  6, 7 and 8 which are for the
benefit of any other Party.

8.4   Waiver of Conditions in Nevis Agreement

The Company  shall not waive any of the  conditions  precedent of the Company to
closing set forth in Article 7 of the Nevis Agreement.

8.5   Delivery of Debentures to the Representative

Prior  to  the  Closing,  the  Vendors  shall  deliver  the  Debentures  to  the
Representative,  to be held in trust until  payment of the principal and accrued
but unpaid  interest has been made in  accordance  with section 9.7. The Vendors
and the  Representative  shall not demand payment of the Debentures earlier than
the Business Day immediately following the Closing Date.

                                     







ARTICLE 9
POST-CLOSING MATTERS

9.1   Claims

(a) If,  at any  time,  a Party or  Parties  (herein,  whether  one or  more,  a
"Notifying  Party")  believes  that it has  incurred or suffered or that it will
incur or suffer  liabilities,  losses or costs (herein  collectively  "Damages")
because  of the  incorrectness  or breach of a  representation  or  warranty  in
Article 3 or 4 (whether  as of the date  hereof or at the  Closing  Time) or the
certificates delivered by the Company pursuant to Section 6.1 and 6.2 hereof, or
the breach of any covenant set forth in Section  2.3(d),  8.1,  8.4, 8.5, 9.3 or
9.6 or this  Section  9.1 or  Articles  10, 11 or 13, or any  amount of Taxes or
Alberta  Crown   Royalties   finally   established   by  a  Court  of  competent
jurisdiction,  or agreed by the  Representative  to be payable by the Company as
the result of an Assessment as  contemplated  in Section 9.6, or any such amount
paid in good faith by the Company or the  Purchaser  (without the consent of the
Representative) with respect to an Assessment as contemplated in Sections 9.6(b)
and (d), or any claim by Jefferies for indemnification pursuant to the Jefferies
Indemnification Letter as the case may be, or the fraud of the Company or any of
the  Vendors,  as the  result of which it has an actual or  potential  claim for
Damages or amounts or that for any other reason it has any claim hereunder (each
such claim being  referred to as a  "Contractual  Claim"),  the Notifying  Party
shall  forthwith give written  notice  (herein the "Claim  Notice") to the other
Parties (herein,  whether one or more, the "Receiving  Party") and to the Escrow
Agent of the matter giving rise to the Contractual Claim. The notification shall
specify in reasonable detail the subject matter of the Contractual Claim, to the
extent then known to the  Notifying  Party.  The  Parties  agree to deal in good
faith in the settlement or resolution of any Contractual Claim.

(b) Upon notice to the Notifying  Party within 10 Business Days after receipt of
a Claim Notice,  the Receiving Party shall have the right, in good faith, at its
own expense (not to be paid from the Escrow  Account) and  employing  counsel of
its own choice, to contest and assume the defence of any Contractual Claim which
may result  from a Claim made by a third  party.  In such event,  the  Notifying
Party shall have the right to retain its own  counsel but the fees and  expenses
of such counsel shall be at the expense of the Notifying  Party.  The failure to
give such  notice of intent to defend a  Contractual  Claim shall  constitute  a
waiver of the  Receiving  Party's right to defend such  Contractual  Claim under
this Section  9.1(b) and shall  preclude the Receiving  Party from disputing the
manner in which the  Notifying  Party may in good faith  conduct  the defence of
such Contractual Claim or the reasonableness of any amount paid in good faith by
the Notifying  Party in satisfaction of such  Contractual  Claim.  The Receiving

                                       





Party shall not compromise or settle any  Contractual  Claim without the consent
of the Notifying Party, not to be unreasonably withheld.

(c) The  failure  by a Party to give a Claim  Notice to the other  Parties  with
respect  to any  Contractual  Claim  shall  relieve  the other  Parties of their
obligations with respect to the particular Contractual Claim, but only if and to
the extent that the other Parties are prejudiced by such failure. The failure by
a Party to give the other  Parties a Claim  Notice with respect to any actual or
potential  Contractual  Claim within the period  applicable by virtue of Section
5.1(b) shall relieve the Parties against whom the particular  Contractual  Claim
is or may be made of any liability with respect to such Contractual Claim.

(d) The Parties  will  cooperate  with each other in  providing  access to their
respective  records in connection with Contractual  Claims.  The Purchaser shall
preserve  such data and other  information  as may  reasonably  be  required  in
connection  with a  Contractual  Claim  until the end of the  limitation  period
applicable by virtue of Section 5.1(b).  The Notifying Party will use reasonable
efforts to make available to the Receiving Party:

      (i) those  Persons who are then  employees of the  Notifying  Party or the
Vendors  whose  assistance,  testimony  or presence is necessary or advisable to
assist the  Receiving  Party to  evaluate  and defend  the  subject  matter of a
Contractual Claim; and

      (ii) all  documents,  records and other  materials  in the  possession  or
control of the Notifying Party and reasonably required by the Receiving Party to
evaluate and defend the subject matter of a Contractual Claim,

and,  subject  to the  other  provisions  of  this  Agreement,  shall  otherwise
cooperate in all reasonable  respects with the Receiving Party in evaluating and
defending the subject matter of Contractual Claims. The Purchaser shall preserve
all  documents,  records  and other  material as may  reasonably  be required in
connection  with the subject matter of a Contractual  Claim,  for so long as the
obligation to indemnify continues in effect.

(e) Notwithstanding  any other provision of this Agreement to the contrary,  the
representation  and  warranty  set forth in Section  3.9(i)  shall be  breached,
untrue or incorrect only if and to the extent that the aggregate of the tax pool
amounts  referred to by  category  in Section  3.9(i)(i)  to (vi)  inclusive  as
finally  determined  is less  than $31  million,  and the  Damages  incurred  or
suffered by the Purchaser shall be deemed to be equal to $0.30 for each $1.00 by
which the aggregate of the said tax pool amounts is less than $31 million.




                                      


9.2   Escrow Account

(a) Subject to Article 5, the  Purchaser  shall be entitled to recover  from the
Escrow Account the Damages to which it establishes  itself entitled  pursuant to
the terms of the Escrow  Agreement,  in respect of a  Contractual  Claim for the
incorrectness or breach of a  representation  or warranty set forth in Article 3
(whether as of the date hereof or as of the Closing Date),  or the  certificates
of the Company  delivered  pursuant to Sections  6.1 and 6.2 hereof or any other
covenant or agreement  set forth herein or any amount of Taxes or Alberta  Crown
Royalties finally established by a Court of competent jurisdiction, or agreed by
the  Representative  to be payable by the Company as the result of an Assessment
as  contemplated  in Section  9.6,  or any such amount paid in good faith by the
Company  or the  Purchaser  (without  the  consent of the  Representative)  with
respect to an  Assessment  as  contemplated  in Sections  9.6(b) and (d), or any
claim by Jefferies for indemnification pursuant to the Jefferies Indemnification
Letter,  the fraud of the Company or any of the Vendors,  or any other amount to
which it, Abraxas or the Company  establishes  itself to be entitled pursuant to
the Escrow Agreement (herein an "Established  Contractual Claim") as if all such
representations,  warranties,  covenants  and  agreements  were made jointly and
severally  by the  Vendors.  If the Closing  occurs,  the Vendors  shall have no
claims or rights of  indemnification  or  contribution  against the Company with
respect to any Established  Contractual  Claim  whatsoever  hereunder  including
amounts recovered by the Purchaser from the Escrow Account.

(b) Subject to the last sentence of this Section 9.2(b),  the Purchaser shall be
limited to recovery  from the Escrow  Account for recovery in respect of any and
all Established Contractual Claims whatsoever hereunder,  other than pursuant to
Section  2.3(d) or Article  10.  Subject to the last  sentence  of this  Section
9.2(b),  in no event will the  Purchaser  have any claim  whatsoever  under this
Agreement  against  the  Representative,  the  Vendors or the  current or former
employees,  officers or directors of the Company or any of them personally,  nor
will the  Purchaser be entitled to recover  separately or in the  aggregate,  in
respect of all  Established  Contractual  Claims and each of them,  an amount in
excess of the Escrow  Amount.  In no event will the  limitations in this Section
9.2(b) apply to:

      (i)    any Established Contractual Claim based upon:

                  (A)   the fraud of the Company or any of the
Vendors; or

                  (B) the incorrectness or breach of any of the  representations
and warranties set forth in Sections 3.42 to 3.46 inclusive or the breach of any
covenants or agreements set forth in Section 2.3(d),  8.1(f), 8.5 or Article 10;
or

      (ii) any claim,  right,  demand or cause of action  relating to or arising
out of the  incorrectness or breach of any covenant,  representation or warranty

                                      





in any  agreement  or  document  entered  into or executed by any of the Parties
pursuant to the terms hereof or as contemplated hereby;

            with respect to which the Purchaser or the Vendors,  as the case may
be, shall be entitled to  indemnification  as provided  herein directly from the
other and to such other remedies as may be available at law or in equity.

9.3   Joint Venture Audits

(a) Each  notice  or  enquiry  received  or sent by the  Company,  or  hereafter
received  or sent by the  Company  as a result of any joint  venture  or similar
audit (herein a "Joint Venture Audit")  conducted before or after August 1, 1996
as to expenses  incurred  or  revenues  received in respect of any of the Assets
prior to August 1, 1996 pursuant to an operating agreement is referred to herein
as an "Audit Notice". If an Audit Notice is received or given after Closing, the
Purchaser  shall  within 30 days of the  receipt  or giving of the Audit  Notice
forward a copy of the Audit Notice to the Representative.

(b) If any Audit  Notice is to the effect  that a payment in excess of  $100,000
should be made by or to the Company to or by another  Person,  the Vendors shall
be entitled to have reasonable access during normal business hours to review the
records of the  Company  pertaining  to the  matter,  in order to  evaluate  the
matters  disclosed in the Audit  Notice.  Neither the  Purchaser nor the Company
shall  make a payment  by way of an  adjustment  resulting  from any such  Joint
Venture  Audit,  of expenses or revenues  pertaining  to any period ending on or
prior to August 1,  1996,  without  the  consent  of the  Representative  acting
reasonably,  except  pursuant to the award of a Court or arbitrator.  Subject to
Sections  5.1,  9.1 and 9.2, if the amount of the payment to be made or received
by the  Company,  as the  case  may be,  exceeds  $100,000,  the  Vendors  shall
forthwith reimburse the Company for, or the Purchaser shall cause the Company to
pay to the  Representative  (for immediate  disbursement to the Vendors as their
interests  appear),  as the case may be,  the  amount by which the said  payment
exceeds $100,000.

(c) The Vendors shall have the right at their own expense (not to be paid out of
the Escrow  Account)  and  employing  counsel of their own choice to contest any
Audit  Notice to the effect that a payment in excess of $100,000  should be made
by the Company to another  Person.  In that event,  the Purchaser shall have the
right to retain its own counsel but the fees and expenses of such counsel  shall
be at the expense of the Purchaser.

9.4   Stub Period Returns

(a) The Company  shall cause to be prepared  and filed on a timely basis all Tax
Returns for the Company for the fiscal  period which ends  immediately  prior to
Closing.  The Representative  will have a reasonable  opportunity to review such

                                      





Tax Return prior to the filing thereof.

(b) The Parties shall cooperate fully with each other and make available to each
other in a timely  fashion such data and other  information as may reasonably be
required for the preparation of the Tax Return referred to in Section 9.4(a) and
shall  preserve  such data and other  information  until the  expiration  of any
applicable limitation period under any applicable law with respect to Taxes.

9.5   Change of Name

The Purchaser  will not use, in the name of the Company or its  successors,  the
term "CGGS" or "CGGS  Canadian  Gas  Gathering  Systems  Inc." or any other term
which is confusingly similar to such term.

9.6   Tax and Royalty Mattersa

(a)  Notwithstanding  any other  provision  set forth in this  Agreement  to the
contrary,  if, at any time, the Purchaser or the Company receives an assessment,
a reassessment,  an indication in writing that an assessment is being considered
or  proposed,  or any  other  notice  in  writing  relating  to an  amount  (the
"Assessment")  of Taxes or Alberta Crown Royalties paid or payable in respect of
any period  ending on or prior to July 31,  1996,  the  Purchaser or the Company
shall deliver to the Representative  within 30 days of receiving the Assessment,
a copy of the Assessment,  together with a statement setting out the obligations
of the Vendors  pursuant to this  Section 9.6 and the Escrow  Agreement,  on the
assumption that the Assessment is valid and binding.

(b) Upon notice given by the  Representative to the Purchaser within 15 Business
Days after receipt by the Representative  from the Purchaser or the Company of a
notice of an Assessment,  the Representative on behalf of the Vendors shall have
the right at its own  expense  (not to be paid out of the  Escrow  Account)  and
employing  counsel of its own choice to contest,  in good faith, any Assessment.
In such event,  the Purchaser shall have the right to retain its own counsel but
the fees and expenses of such counsel shall be at the expense of the  Purchaser.
The  failure  to give  such  notice of intent to  contest  an  Assessment  shall
constitute a waiver of the Vendors' right to contest such Assessment  under this
Section 9.6(b) and shall preclude the Vendors from disputing the manner in which
the  Purchaser or the Company may in good faith  contest such  Assessment or the
reasonableness  of any amount paid in good faith by the Company in  satisfaction
of such  Assessment.  The  Representative  shall not  compromise  or settle  any
Assessment without the consent of the Purchaser, which shall not be unreasonably
withheld.



                                       



(c) The Purchaser will cooperate with the  Representative,  including  providing
access to its  employees  and to financial  and other records of the Company and
the  Purchaser,  in order to  facilitate  the  filing of Tax  Returns or returns
relating to Alberta Crown  Royalties,  as the case may be, in respect of periods
of time prior to the Closing and the conduct of any disputes  relating  thereto.
The  Purchaser  shall  cause  the  Company  to  preserve  such  data  and  other
information  as may  reasonably be required in  connection  with a Tax Return or
returns relating to Alberta Crown Royalties,  as the case may be, of the Company
for any taxation year or fiscal period ending on or prior to Closing,  until the
end of any applicable limitation period under any applicable law with respect to
Taxes or Alberta Crown Royalties, as the case may be.

(d) Except with the consent of the  Representative,  which  consent shall not be
unreasonably  withheld,  the  Purchaser  shall  not,  and shall not  permit  the
Company,  to  agree  to  any  compromise  or  settlement  with  respect  to  any
Assessment;  provided,  however,  that  notwithstanding  the  foregoing,  if the
Purchaser  or the  Company  determines  in good faith  that the  failure to pay,
compromise or settle an  Assessment  could  adversely  affect the Company or its
business, the Purchaser or Company may pay, compromise or settle such Assessment
and such  action  shall not  impair  or  adversely  affect  the  Purchaser's  or
Company's  right to make such payment the subject of a claim in accordance  with
Sections 9.1, 9.2 and 9.6 hereof.

(e) If a refund of Taxes or Alberta Crown Royalties,  as the case may be (to the
extent not  reflected in the July 31 Balance  Sheet) (the  "Refund") is received
by, or credited to, the account of the Company,  in respect of any fiscal period
ending on or prior to July 31, 1996,  such recipient shall pay the amount of the
Refund to the  Representative,  after deduction of an amount equal to the amount
of Taxes,  if any,  to which the  recipient  would be subject as a result of the
receipt or crediting of such Refund.  The  Representative  shall  forthwith upon
receipt of any such Refund  distribute  same to the Vendors as their  respective
interests appear.

(f) The  Purchaser  undertakes  to inform and to cause the Company to inform the
Representative  of all written  audit  inquiries  received  with  respect to the
representations  and warranties in Section 3.9 within 30 days of receipt thereof
and to provide  the  Representative  with the right to make any  representations
prior to an Assessment.

(g)  References to the "Company" in this Section 9.6 shall include and be deemed
to include successors to such corporations by way of amalgamation, winding-up or
other reorganization of any nature whatsoever.

(h) The  failure  by the  Purchaser  to give to the  Representative  the  notice
required by Section 9.6(a) with, respect to any Claim relating to Tax or Alberta
Crown  Royalty  matters  shall  relieve  the Vendors of their  obligations  with

                                      





respect to such  Claim  only in the event the  Vendors  are  prejudiced  by such
failure.

(i) Notwithstanding any of the provisions of this Agreement, the Purchaser shall
not be entitled to recover twice for the same Damages or Claim under Section 9.2
in respect  of the breach or  incorrectness  of any of the  representations  and
warranties  set  forth in  Article  3 or in  respect  of any  amount of Taxes or
Alberta Crown Royalties.

9.7   Repayment of Debentures

On the same  Business  Day as the  Representative  makes  written  demand of the
Company, which shall not be made earlier than the Business Day immediately after
Closing,  the  Purchaser  shall cause the Company to repay in full the principal
amount of the Debentures,  plus the interest accrued but unpaid thereon,  to the
Vendors,  as  their  respective   interests  appear.  The  principal  amount  of
Debentures  to be held  by each of the  Vendors  shall  be the  Canadian  dollar
equivalent  of the U.S.  dollar  amounts set forth in the column "Old  Debenture
Principal  (US$)" in Schedule  1.1(c),  plus certain accrued but unpaid interest
thereon,  all  as  contemplated  in  Section  2.1 of  the  Debenture  Prepayment
Agreement.  At the time of such repayment,  the Representative shall deliver all
of the  Debentures  to the  Company,  free and  clear of all  Encumbrances,  for
cancellation. The repayment required under this Section 9.7 shall be made to the
Representative  for  immediate  disbursement  to the Vendors in the  proportions
appearing in column "Percentage of Old Debenture Principal" in Schedule 1.1(c).


ARTICLE 10
CONFIDENTIALITY

10.1  Confidential Information

As used herein,  "Confidential Material" means, with respect to the Company, all
information,  whether oral,  written or otherwise,  and all reports or analyses,
compilations,  studies and other materials prepared, either prior to the Closing
Date or after the Closing Date in respect of any matter  arising  hereunder,  by
the Company or any officer,  director,  employee, agent or representative of the
Company, (in whatever form maintained, whether documentary,  computer storage or
otherwise)  containing,  reflecting  or based  upon,  in  whole or in part,  any
information of the Company.  The term  "Confidential  Material" does not include
information which (i) is or becomes generally available to the public other than
as a result of a disclosure  by any of the Vendors or any  officers,  directors,
employees,  agents or  representatives  of the  Vendors  (collectively,  in this
Article  10,  "Representatives")  or anyone to whom the  Vendors or any of their
Representatives   transmit  any  Confidential  Material  in  violation  of  this
Agreement,  (ii) is or  becomes  known  or  available  to the  Vendors  or their
                                       





Representatives  on a  non-confidential  basis  from a  source  (other  than the
Company) who is not, to the  knowledge  of the Vendors or their  Representatives
after reasonable  inquiry,  prohibited from  transmitting the information to the
Vendors or their  Representatives  by a contractual,  legal,  fiduciary or other
obligation or (iii) is contained in the Offering Memorandum.


10.2  Obligation

Subject to Section 10.3 or except as required by law, the Confidential  Material
will be kept confidential by the Vendors and the  Representatives  and will not,
without the prior written consent of the Company,  the Purchaser and Abraxas, be
disclosed by the Vendors or their Representatives, in whole or in part, and will
not be used by the Vendors or their Representatives, directly or indirectly, for
any purpose other than in connection with this Agreement.

10.3  Disclosure

In the event that any of the Vendors or their  Representatives or anyone to whom
any of the Vendors or their  Representatives  supply the Confidential  Material,
are  requested or required  (by oral  questions,  interrogatories,  requests for
information or documents,  subpoena,  civil investigative demand, any government
or  governmental  agency or  authority or  otherwise  in  connection  with legal
processes)  to disclose any  Confidential  Material,  such Vendor  agrees (i) to
immediately  notify the Company,  the  Purchaser  and Abraxas of the  existence,
terms and  circumstances  surrounding  such a request  (ii) to consult  with the
Company,  the  Purchaser  and  Abraxas  on the  advisability  of taking  legally
available steps to resist or narrow such request and (iii) if disclosure of such
information  is  required,  to furnish  only that  portion  of the  Confidential
Material which, in the opinion of such Vendor's counsel,  such Vendor is legally
compelled  to disclose  and to  cooperate  with any action by the  Company,  the
Purchaser  and  Abraxas  to  obtain  an  appropriate  protective  order or other
reliable assurance that confidential treatment will be accorded the Confidential
Material (it being  agreed that the Company,  the  Purchaser  and Abraxas  shall
reimburse the Vendor for all reasonable  out-of-pocket  expenses incurred by the
Vendor in connection with such cooperation).

10.4  Remedies

The Vendors  acknowledge and agree that any breach or threatened  breach of this
Article  10 may cause  irreparable  injury to the  Company,  the  Purchaser  and
Abraxas  and that  money  damages  would in that event not  provide an  adequate
remedy to the Company, Purchaser and Abraxas and that the Company, the Purchaser
and Abraxas shall have the right,  without limiting any other remedies available
to them  hereunder,  to have the  provisions  of this  Section  10  specifically
enforced by any court having equity jurisdiction.

                                      







ARTICLE 11
GENERAL

11.1  Covenant of the Vendors

The Vendors hereby engage  Feshbach & Sons (the  "Adviser") to act as adviser to
the Vendors with respect to the transactions contemplated by the Nevis Agreement
and this Agreement. As payment for such advisory services, the Vendors shall pay
pro rata to the Adviser a success fee (the "Success  Fee") equal to 1.75% of the
aggregate amount of  consideration  received by the Vendors from the proceeds of
sale in  respect  of the  Nevis  Agreement  and this  Agreement,  including  any
escrowed  or  contingent  amounts  of such  consideration,  and  any  additional
consideration  payable pursuant to any  post-closing  adjustment under the Nevis
Agreement and this Agreement. The Adviser will reallow 3/7ths of the Success Fee
to certain  officers or  directors  of the Company or  Morrison.  The  foregoing
arrangement has been approved by representatives of the largest shareholder, Gas
Systems I  Corporation  (on behalf of the trustees of General  Electric  Pension
Trust).

11.2  Public Notices

Each of the Parties shall be entitled to  communicate  the details of the within
transaction to its shareholders and employees and to investment  analysts and to
issue press releases,  notwithstanding  the Confidentiality  Agreement.  A Party
making any such communication shall advise the other Party of the occurrence and
nature of each such disclosure and shall deliver a copy of each press release to
the other Party so that the other Party will have the  opportunity to review the
press release in advance of its dissemination. All other public notices to third
parties and all other publicity concerning the transactions contemplated by this
Agreement  shall be jointly  planned and coordinated by the Parties and no Party
shall act  unilaterally  in this regard  without the prior approval of the other
Party, such approval not to be unreasonably withheld, except:

(a)   in the case of the Vendors for communications made in
confidence to the Company's employees affected by such
transactions; or

(b) where required to do so by law or by the applicable  regulations or policies
of  any  provincial  or  Canadian  or  other  regulatory   agency  of  competent
jurisdiction  or any stock exchange in  circumstances  where prior  consultation
with the other Party is not practicable.




  



11.3  Expenses

All costs and expenses  (including the fees and  disbursements of legal counsel)
incurred in connection  with this  Agreement and the  transactions  contemplated
hereby shall be paid by the Party  incurring such expenses;  provided,  however,
the Company shall not bear any of the costs and expenses incurred in whole or in
part by the Vendors in connection  with this  Agreement and the Nevis  Agreement
and the transactions contemplated hereby and thereby.

11.4  Notices

Any  notice or other  writing  required  or  permitted  to be given  under  this
Agreement or for the purposes of this Agreement  (referred to in this Section as
a "Notice")  shall be  sufficiently  given if  delivered  or if  transmitted  by
facsimile or other form of recorded communication to such Party:

(a)   to the Representative, for and on behalf of all of the
Vendors in the case of a Notice to the Vendors at:

Bernard Feshbach
            #404, 1510 Oak Creek Drive
            Palo Alto, California
            94304-2032

            Fax:        (415) 321-5627

            with a copy to:

            Bennett Jones Verchere
            4500 Bankers Hall East
            855 - 2nd Street S.W.
            Calgary, AB  T2P 4K7

            Attention:        Donald E. Greenfield
            Fax:        (403) 265-7219

            and to:

            Curtis, Mallet-Provost, Colt & Mosle
            101 Park Avenue
            New York, New York
            10178-0061

            Attention:        Albert Francke
                        Carl Ruggiero
            Fax:        (212) 697-1559

(b)   prior to the Closing, in the case of a Notice to the Company
at:

CGGS CANADIAN GAS GATHERING SYSTEMS INC.
            #3000, 400 - 3rd Avenue S.W.
            Calgary, Alberta
            T2P 4H2

  




            Attention:        Ken Woolner
            Fax:        (415) 750-3186

            with a copy to:

            Bennett Jones Verchere
            4500 Bankers Hall East
            855 - 2nd Street S.W.
            Calgary, AB  T2P 4K7

            Attention:        Donald E. Greenfield
            Fax:        (403) 265-7219

            and to:

            Curtis, Mallet-Provost, Colt & Mosle
            101 Park Avenue
            New York, New York
            10178-0061

            Attention:        Albert Francke
                        Carl Ruggiero
            Fax:        (212) 697-1559

(c)   in the case of a notice to the Purchaser or to the Company
subsequent to Closing:

Abraxas Petroleum Corporation
            500 North Loop 1604 East, Suite 100
            San Antonio, Texas
            U.S.A.   78232

            Attention:        Robert L. G. Watson
            Fax:        (210) 490-8816

with a copy to:

Cox & Smith Incorporated
            112 E. Pecan Street, Suite 1800
            San Antonio, Texas
            U.S.A.   78205

            Attention:        Steven R. Jacobs
            Fax:        (210) 226-8395

or at such other  address as the Party to whom such  Notice is to be given shall
have last  notified  the Party giving the same,  in the manner  provided in this
Section.  Any Notice  delivered to the Party to whom it is addressed as provided
in this Section shall be deemed to have been given and received on the day it is
so delivered at such  address,  provided  that if such day is not a Business Day
then the Notice  shall be deemed to have been given and received on the Business
Day next following such day. Any Notice sent by prepaid  registered mailed shall
be deemed  to have  been  given and  received  on the  fifth  Business  Day next







following the date of its mailing.  Any notice transmitted by facsimile or other
form of recorded  communication  shall be deemed given and received on the first
Business Day after its transmission.

11.5  Parties in Interest

This  Agreement  is binding upon and is for the benefit of the Parties and their
respective  successors and permitted assigns. This Agreement is not made for the
benefit of any person not a party to this  Agreement,  and no Person  other than
the Parties or their respective  successors and permitted  assigns shall acquire
or have any right, remedy or claim under or by virtue of this Agreement.

11.6  Time

Time shall be of the essence of this Agreement.

11.7  Assignment, Successors and Assigns

Neither  any  Vendor  nor the  Purchaser  shall  assign  all or any part of this
Agreement  nor any of its  rights or  obligations  under this  Agreement  to any
Person,  without  the  prior  written  consent  of  the  other.  Subject  to the
foregoing,  this Agreement shall enure to the benefit of and be binding upon the
Parties and their  respective  successors  (including any successor by reason of
amalgamation of any Party) and permitted assigns.

11.8  Further Assurances

The Parties shall with  reasonable  diligence do all such things and provide all
such  reasonable  assurances as may be required to consummate  the  transactions
contemplated  by this  Agreement,  and each Party  shall  provide  such  further
documents  or  instruments  required  by the  other  Party as may be  reasonably
necessary or desirable to effect the purpose of this Agreement and carry out its
provisions, whether before or after the Closing.

11.9  Counterparts

This Agreement may be executed by the Parties in separate  counterparts  each of
which  when so  executed  and  delivered  shall  be an  original,  but all  such
counterparts shall together constitute one and the same instrument.



ARTICLE 12
TERMINATION

12.1  Termination

In addition to termination as provided elsewhere herein, this






Agreement may be terminated and the transactions  contemplated  hereby abandoned
at any time prior to the Closing:

(a)   automatically if:

      (i)   Closing has not occurred on or before December 31,
1996;

      (ii)  there  shall  be  any  statute,   rule,  or  regulation  that  makes
consummation  of the  transactions  contemplated  hereby  illegal  or  otherwise
prohibited or a Governmental  Authority shall have issued an order,  decree,  or
ruling  or  taken  any  other  action  permanently  restraining,  enjoining,  or
otherwise prohibiting the consummation of the transactions  contemplated hereby,
and such order,  decree,  ruling,  or other  action  shall have become final and
nonappealable;

(b)   by mutual written agreement of the Parties;

(c)   by the Vendors with notice to the Purchaser if one or more
of the conditions set forth in Article 7 are not satisfied as of
the Closing Date;

(d)   by the Purchaser with notice to the Vendors if one or more
of the conditions set forth in Article 6 are not satisfied as of
the Closing Date;

(e)   by the Vendors pursuant to Section 2.6.


12.2  Effect of Termination

In the event of the termination of this Agreement by a Party pursuant to Section
12.1 or otherwise,  written notice thereof shall forthwith be given to the other
Parties  specifying the provision  hereof pursuant to which such  termination is
made, and this Agreement  shall become void and have no effect,  and there shall
be no  liability  hereunder  on the part of any of the  Parties (or any of their
respective directors,  officers,  employees,  shareholders, or representatives),
except such  liabilities  or damages as are  provided  for in Section  2.7(c) in
respect of the  Purchaser  and in Section  2.8 in  respect of the  Vendors.  The
provisions  contained in this Section and in Section 3.41, 3.46, 4.6, 11.1, 11.2
and 11.3 and Article 13 shall survive the termination hereof.

ARTICLE 13
ARBITRATION

13.1  Arbitration

(a) Any  dispute  arising  in  connection  with the  Agreement  shall be finally
settled under the Rules of  Conciliation  and  Arbitration of the  International
Chamber of Commerce:






      (i)   by one arbitrator nominated by the Parties;

      (ii)  in Calgary, Alberta;

      (iii)       in the English language; and

      (iv)  the laws of Alberta shall govern.

(b) Subject to Section 2.9, a Party wishing to have recourse to  arbitration  by
the International  Chamber of Commerce shall, in addition to the requirements of
the Rules of  Conciliation  and  Arbitration  of the  International  Chamber  of
Commerce, advise the other Party of its intention to do so by giving at least 10
days notice as herein provided  specifying the subject of dispute,  the contract
number and date and that Party's choice of arbitrator.

(c) For purposes of this Agreement, a dispute shall include a difference between
the Parties as to the  interpretation,  application  or  administration  of this
Agreement,  any failure to agree where  agreement  between the Parties is called
for  and any  dispute  which  this  Agreement  specifically  provides  shall  be
arbitrated where the Parties are unable to resolve a dispute.

      IN WITNESS WHEREOF the Parties have hereunto duly executed this Agreement.







CANADIAN ABRAXAS PETROLEUM LIMITED


By:
      Name:
      Title:

By:
      Name:
      Title:


CGGS CANADIAN GAS GATHERING SYSTEMS INC.

By:
      Name:
      Title:

By:
      Name:
      Title:


GAS SYSTEMS I CORPORATION

By:
      Name:
      Title:

By:
      Name:
      Title:



WITNESS



WITNESS






FLEET NATIONAL BANK, as Trustee of Echlin Pension Master Trust

By:
      Name:
      Title:

By:
      Name:






      Title:


MELLON BANK, N.A., as Trustee for the Alcoa Master Trust

By:
      Name:
      Title:

By:
      Name:
      Title:


STATE STREET BANK AND TRUST COMPANY, as Trustee of the GMI/DRI
Investment Trust

By:
      Name:
      Title:

By:
      Name:
      Title:


ROYAL TRUST CORPORATION OF CANADA, in trust for the Kodak Canada
Inc. Retirement Income Plan

By:
      Name:
      Title:

By:
      Name:
      Title:


GENERAL REINSURANCE CORPORATION


By:
      Name:
      Title:

By:
      Name:
      Title:

ABRAXAS PETROLEUM CORPORATION


By:
      Name:






      Title:

By:
      Name:
      Title:


MORRISON PETROLEUMS LTD.


By:
      Name:
      Title:

By:
      Name:
      Title:


GAS SYSTEMS II CORPORATION

By:
      Name:
      Title

By:
      Name:
      Title:



BERNARD FESHBACH



DENNIS P. LYNCH






MARCUS SCHLOSS & CO., INC.


By:
      Name:
      Title:

By:
      Name:
      Title:







MORGAN GUARANTY TRUST CO. OF N.Y. as Trustee

By:
      Name:
      Title:

By:
      Name:
      Title:


BOSTON SAFE DEPOSIT AND TRUST COMPANY, as Trustee of Kodak
Retirement Income Plan

By:
      Name:
      Title:

By:
      Name:
      Title:


HOWARD HUGHES MEDICAL INSTITUTE


By:
      Name:
      Title:

By:
      Name:
      Title:


BEINECKE INVESTMENT FUND, L.P., by Ashford Capital Management,
Inc. as general partner

By:
      Name:
      Title:

By:
      Name:
      Title: