ABRAXAS PETROLEUM CORP
S-4, 1998-01-09
CRUDE PETROLEUM & NATURAL GAS
Previous: SAFECO COMMON STOCK TRUST, SC 13G, 1998-01-09
Next: ASM INDEX 30 FUND INC, N-30D, 1998-01-09



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

                                            Registration No. 333-___________

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

                          ABRAXAS PETROLEUM CORPORATION
             (Exact name of registrant as specified in its charter)

     Nevada                   1331                           74-2584033
(State or other      (Primary Standard Industrial       (I.R.S. Employer 
 jurisdiction of     Classification Code Number)     Identification Number)   
incorporation or                   
 organization)                             

                                                 Robert L. G. Watson
500 North Loop 1604 East                         500 North Loop 1604 East
Suite 100                                        Suite 100
San Antonio, Texas  78232                        San Antonio, Texas  78232
(210) 490-4788                                   (210) 490-4788
(Address, including zip code,                    (Name, Address, including zip
and telephone number, including                  code, and telephone  number,
executive offices)                               including area, of agent 
offices)                                         for service)

Copies to:

Steven R. Jacobs                                  Christine B. LaFollette
Cox & Smith Incorporated                          King & Spalding
112 E. Pecan Street, Suite 1800                   1100 Louisiana, Suite 3300
San Antonio, Texas  78205                         Houston, Texas  77002-5219
(210) 554-5500                                    (713) 751-3200

         APPROXIMATE  DATE OF  COMMENCEMENT  OF PROPOSED SALE TO THE PUBLIC:  As
soon as practicable after this Registration  Statement becomes effective and all
other conditions to the Merger of a wholly-owned subsidiary of Abraxas Petroleum
Corporation  ("Abraxas") with and into Vessels Energy, Inc. ("Vessels") pursuant
to the  Agreement  and Plan of Merger  filed as Exhibit 2.1 hereto (the  "Merger
Agreement") have been satisfied or waived.

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

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

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


<PAGE>



                         CALCULATION OF REGISTRATION FEE
 
                                                                       
Title of each class               Proposed Maximum Proposed Maximum  Amount of
of Securities to be  Amount to be  Offering Price     Aggregate    Registration 
     Registered      Registered      Per Share      Offering Price     Fee    
- ------------------- -------------- -------------    --------------- -----------
Common  Stock, par    1,900,000        $14.19 (2)    $26,961,000(3) $7,954 (4)
value $.01 per share   shares (1)        
                       

(1) The number of shares of common stock,  par value $.01 per share,  of Abraxas
("Abraxas  Common  Stock") to be  registered  has been  determined  based on the
estimated  maximum  number  of shares of  Abraxas  Common  Stock to be issued in
exchange  for  shares of common  stock,  par value  $.10 per  share,  of Vessels
("Vessels Common Stock"), in the merger of a wholly-owned  subsidiary of Abraxas
with and into Vessels (the  "Merger") and upon  exercise of certain  warrants of
Vessels following the Merger, all as contemplated by the Merger Agreement.

(2)  Estimated  pursuant to Rule 457(f)  under the  Securities  Act of 1933 (the
"Securities  Act"), based on the market value of $14.19 for Abraxas Common Stock
(which is the  average of the bid and asked  prices of shares of Abraxas  Common
Stock on the Nasdaq National Market on January 7, 1998).

(3)  Estimated  pursuant to Rule 457(f)  under the  Securities  Act based on the
product of the  estimated  maximum  offering  price per share and the  estimated
number of shares of Abraxas  Common  Stock to be issued in  connection  with the
Merger.

(4) The Registrant  previously  paid $5,600 in connection with the filing of the
preliminary Proxy Statement-Prospectus contained in this Registration Statement.
The amount of $2,354,  the difference  between the  Registration  Fee referenced
above  and  $5,600,   is  being  paid  concurrently  with  the  filing  of  this
Registration Statement.

         THE REGISTRANT HEREBY AMENDS THIS  REGISTRATION  STATEMENT ON SUCH DATE
OR DATES AS MAY BE NECESSARY TO DELAY ITS  EFFECTIVE  DATE UNTIL THE  REGISTRANT
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY  STATES THAT THIS REGISTRATION
STATEMENT WILL  THEREAFTER  BECOME  EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES  ACT OF 1933 OR UNTIL THIS  REGISTRATION  STATEMENT  SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE  COMMISSION  ACTING  PURSUANT TO SAID SECTION 8(A)
MAY DETERMINE.

                                       ii
<PAGE>


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

       REGISTRATION STATEMENT ITEM OF FROM S-4       CAPTION OR LOCATION

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

2.    Inside Front and Outside Back Cove Pages  Outside Front Cover Page;  
      of Prospectus                             Outside Back Cover Page;       
                                                Available Information; 
                                                Table of Contents 
 
3.    Risk  Factors, Ratio of Earnings to       Summary; Risk Factors; Selected
      Fixed  Charges and Other Information      Consolidated Financial        
                                                Information; Unaudited Pro
                                                Forma Financial Information

4.    Terms of the Transaction                  Outside Front Cover Page; 
                                                Summary; The Merger; Description
                                                of  Abraxas  Capital  Stock; 
                                                Certain Federal Income Tax 
                                                Consequences; Comparison of    
                                                Rights of Stockholders of the  
                                                Company and Stockholders of 
                                                Vessels; Certain Differences
                                                Between Nevada and Delaware
                                                Corporate Laws

5.    Pro Forma Financial Information           Unaudited Pro Forma Financial 
                                                Information

6.    Material Contacts with the Company        Summary; The Merger
      Being Acquired    

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

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

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

10.   Information with Respect to S-3           Inapplicable
      Registrants          

11.   Incorporation of Certain Information      Incorporation of Certain 
      by Reference                              Documents by Reference

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

13.   Incorporation of Certain Information      Inapplicable
      by Reference    

14.   Information with Respect to Registrants   Summary; Business of Abraxas;
      Other than S-3 or S-2 Registrants         Consolidated Financial
                                                Statements   of   Abraxas;
                                                Selected Historical Financial
                                                Data of Abraxas; Unaudited
                                                Pro Forma Financial Information;
                                                Abraxas Management's Discussion
                                                and Analysis of Financial
                                                Condition and Results of
                                                Operation; Financial Statements
                                      iii
<PAGE>


15.   Information with Respect to S-3           Inapplicable
      Companies            

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

17.   Information  with Respect to Companies    Summary; Business of Vessels;  
      Other than S-2 or S-3 Companies           Selected Historical Financial
                                                Data of Vessels; Unaudited Pro
                                                Forma Financial Information;
                                                Vessels Management's Discussion
                                                and Analysis of Financial
                                                Condition and Results of
                                                Operation; Financial Statements

18.   Information if Proxies, Consents or       Front Cover Page; Summary;  The 
      Authorizations are to be Solicited        Special Meeting; Appraisal
                                                Rights; Interests of Certain
                                                Persons in the Merger; Security 
                                                Ownership of Certain Beneficial
                                                Owners and Management; 
                                                Management of Abraxas After the
                                                Merger; Certain Transactions

19.   Information if Proxies, Consents or       Inapplicable
      Authorizations are not to be Solicited
      or in an Exchange Offer


                                       iv
<PAGE>




                          ABRAXAS PETROLEUM CORPORATION
                       500 North Loop 1604 East, Suite 100
                            San Antonio, Texas 78232

                                 January 9, 1998

Dear Stockholders:

         You are  invited  to attend the  Special  Meeting  of  Stockholders  of
Abraxas  Petroleum  Corporation  ("Abraxas") to be held on Friday,  February 13,
1998, at 9:00 a.m., Central Time, at Abraxas' offices, 500 North Loop 1604 East,
Suite 100, San Antonio,  Texas 78232  (including any postponement or adjournment
thereof, the "Special Meeting").

         At the Special  Meeting,  you will be asked to consider and vote upon a
proposal to approve the merger (the  "Merger") of a  wholly-owned  subsidiary of
Abraxas with and into Vessels  Energy,  Inc.  ("Vessels")  and the issuance (the
"Share Issuance") of a total of 1,900,000 shares of Common Stock, par value $.01
per share, of Abraxas ("Abraxas Common Stock") in connection with the Merger.

         The Merger is provided for in an Agreement  and Plan of Merger dated as
of  November  12,  1997  (the  "Merger  Agreement")  by  and  among  Abraxas,  a
wholly-owned  subsidiary of Abraxas and Vessels. As a result of the Merger, each
outstanding  share of  Common  Stock,  par  value  $.10 per  share,  of  Vessels
("Vessels Common Stock") will be converted into the right to receive a number of
shares of Abraxas Common Stock equal to the sum of approximately  22.8 shares of
Abraxas Common Stock plus approximately  29.98 additional shares to be issued by
Abraxas pursuant to a formula set forth in the Merger Agreement and described in
the accompanying Proxy Statement-Prospectus.

         Abraxas' Board of Directors has determined  that the Merger is fair and
in the best  interests  of  Abraxas  and its  stockholders  and has  unanimously
approved the Merger and the Share Issuance.

         THE BOARD OF DIRECTORS UNANIMOUSLY  RECOMMENDS THAT THE STOCKHOLDERS OF
ABRAXAS VOTE "FOR" THE APPROVAL OF THE MERGER AND THE SHARE ISSUANCE.

         Please read  carefully the  accompanying  Notice of Special  Meeting of
Stockholders and Proxy Statement-Prospectus for additional information regarding
the Merger and the Share Issuance. Whether or not you plan to attend the Special
Meeting,  please complete,  sign, and date the enclosed proxy card and return it
promptly in the enclosed  postage  prepaid  envelope.  If you attend the Special
Meeting,  you may vote in person if you wish,  even  though you have  previously
returned your proxy card.



                                                     Sincerely,



                                                     Robert L. G. Watson
                                                     Chairman of the Board,
                                                     Chief Executive Officer
                                                     and President



<PAGE>




                          ABRAXAS PETROLEUM CORPORATION
                       500 North Loop 1604 East, Suite 100
                            San Antonio, Texas 78232




                    NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
                         TO BE HELD ON FEBRUARY 13, 1998



To the Stockholders:

         Notice is  hereby  given  that a Special  Meeting  of  Stockholders  of
Abraxas Petroleum Corporation  ("Abraxas") is to be held on Friday, February 13,
1998, at 9:00 a.m., Central Time, at Abraxas' offices, 500 North Loop 1604 East,
Suite 100, San Antonio,  Texas  78232(including  any postponement or adjournment
thereof, the "Special Meeting") for the following purpose:

         To consider and vote upon the merger (the  "Merger") of a subsidiary of
Abraxas  ("Sub") with and into Vessels  Energy,  Inc.("Vessels")  pursuant to an
Agreement  and Plan of  Merger  dated  as of  November  12,  1997  (the  "Merger
Agreement") by and among Abraxas, Sub and Vessels and the issuance of a total of
1,900,000  shares of Common  Stock,  par value  $0.01 per  share,  of Abraxas in
connection with the Merger.

         Please read the accompanying Proxy Statement-Prospectus  carefully. The
Proxy Statement-Prospectus and the Annexes thereto form a part of this Notice.

         Only stockholders of record at the close of business on January 6, 1998
are entitled to notice of and to vote at the Special Meeting.


                                            By Order of the Board of Directors



                                            Stephen T. Wendel,
                                            Secretary


San Antonio, Texas
January 9, 1998




<PAGE>

                                 PROXY STATEMENT
                                       OF
                          ABRAXAS PETROLEUM CORPORATION


                   PROSPECTUS OF ABRAXAS PETROLEUM CORPORATION

         This Proxy  Statement-Prospectus  is  furnished to holders of shares of
common stock,  par value $0.01 per share ("Abraxas  Common  Stock"),  of Abraxas
Petroleum  Corporation,  a Nevada corporation  ("Abraxas" or the "Company"),  in
connection  with the  solicitation by and on behalf of the Board of Directors of
Abraxas  (the  "Abraxas  Board")  of  proxies  for use at a Special  Meeting  of
Stockholders of Abraxas (the "Special  Meeting") to be held at Abraxas' offices,
500 North Loop 1604 East,  Suite 100,  San Antonio,  Texas,  78232 at 9:00 a.m.,
Central Time, on February 13, 1998. This Proxy Statement-Prospectus,  the Notice
of Special Meeting of Stockholders,  and the  accompanying  proxy card are first
being sent to holders of Abraxas Common Stock on or about January 13, 1998.

         At the Special Meeting, holders of record of Abraxas Common Stock as of
the close of business on January 6, 1998 (the "Record  Date") will  consider and
vote upon a proposal  to approve  the merger (the  "Merger")  of a  wholly-owned
subsidiary of Abraxas ("Sub") with and into Vessels Energy, Inc. ("Vessels") and
the issuance (the "Share  Issuance")  of a total of 1,900,000  shares of Abraxas
Common Stock in  connection  with the Merger.  The Merger will result in Vessels
becoming a wholly-owned subsidiary of Abraxas.

         This Proxy  Statement-Prospectus  also  constitutes  the  Prospectus of
Abraxas  included in a  Registration  Statement on Form S-4  (together  with any
amendments thereto, the "Registration  Statement") filed with the Securities and
Exchange  Commission  (the  "Commission")  under the  Securities Act of 1933, as
amended (the "Securities  Act"), with respect to the issuance of up to 1,900,000
shares of Abraxas Common Stock in connection  with the Merger.  All  information
concerning  Abraxas  contained  in  this  Proxy  Statement-Prospectus  has  been
furnished by Abraxas and all information  concerning  Vessels  contained in this
Proxy Statement-Prospectus has been furnished by Vessels.

         At the effective time of the Merger (the "Effective  Time"),  each then
outstanding  share of  Common  Stock,  par  value  $.10 per  share,  of  Vessels
("Vessels Common Stock") (other than shares held by stockholders of Vessels,  if
any, who properly  exercised their appraisal  rights under Delaware law) will be
converted into the right to receive  approximately 30.3 shares of Abraxas Common
Stock,  of which  approximately  7.5 shares of Abraxas  Common  Stock will be in
consideration of the Projected  Provisional  Payment (as defined herein). Of the
aggregate  of  approximately  1,023,543  shares of Abraxas  Common  Stock issued
pursuant  to  the  Projected  Provisional  Payment,  25%,  or  an  aggregate  of
approximately  255,886  shares of Abraxas  Common  Stock,  will be issued at the
Effective  Time and the remainder  will be issued and  deposited  into an escrow
account (the "Provisional Payment Escrow").  On April 30, 1999 (the "Provisional
Payment  Date"),  Abraxas will  release that number of shares of Abraxas  Common
Stock  from  the  Provisional  Payment  Escrow  as  are  necessary  to  pay  the
Provisional  Payment  (as  defined  herein)  in  full.  In the  event  that  the
Provisional Payment is greater than the Projected  Provisional Payment,  Abraxas
will release all of the shares deposited into the Provisional Payment Escrow and
will issue any additional  shares necessary to pay the Provisional  Payment.  In
the event that the  Provisional  Payment is less than the Projected  Provisional
Payment,  an  appropriate  number of  shares of  Abraxas  Common  Stock  will be
released from the Provisional  Payment Escrow to the Vessels  stockholders  with
the  remainder  being  returned to Abraxas.  Pursuant to the terms of the Merger
Agreement, if the amount of the Provisional Payment is the same as the amount of
the  Projected  Provisional  Payment,  Abraxas is  required  to issue a total of
approximately 1,801,949 shares of Abraxas Common Stock in the Merger. Abraxas is
seeking the approval of its stockholders to issue a total of 1,900,000 shares of
Abraxas  Common  Stock in the  Merger  in order to cover any  additional  shares
Abraxas  would be required to issue if the  Provisional  Payment is greater than
the Projected Provisional Payment as well as to reserve a total of 12,190 shares
of  Abraxas  Common  Stock for  issuance  pursuant  to the  exercise  of certain
warrants to purchase  Vessels  Common  Stock  which,  upon  consummation  of the
Merger,  will become warrants to purchase Abraxas Common Stock. See "Description
of Abraxas Common Stock - Warrants."
<PAGE>

         For example, pursuant to the terms of the Merger Agreement,  Abraxas is
required to issue to the Vessels stockholders a total of approximately 1,023,543
shares of Abraxas  Common Stock in  consideration  of the Projected  Provisional
Payment,  of which a total of  approximately  255,886  will be  delivered at the
Effective  Time  directly  to the  Vessels  stockholders  and  767,657  will  be
deposited  into the  Provisional  Payment  Escrow.  If the  Provisional  Payment
entitled the Vessels stockholders to an aggregate of 1,000,000 shares of Abraxas
Common Stock,  744,114  shares of Abraxas  Common Stock which had been deposited
into  the   Provisional   Payment  Escrow  would  be  released  to  the  Vessels
stockholders and 23,543 shares would be returned to Abraxas.



         SEE "RISK  FACTORS"  BEGINNING  ON PAGE 23 HEREOF FOR A  DISCUSSION  OF
CERTAIN  RISKS  THAT YOU SHOULD  CONSIDER  IN  DETERMINING  HOW TO VOTE UPON THE
MATTERS DESCRIBED ABOVE.


         THE  SHARES  OF  ABRAXAS  COMMON  STOCK  OFFERED  HEREBY  HAVE NOT BEEN
APPROVED OR DISAPPROVED  BY THE SECURITIES AND EXCHANGE  COMMISSION OR ANY STATE
SECURITIES  COMMISSION  NOR HAS THE  SECURITIES  AND EXCHANGE  COMMISSION OR ANY
STATE SECURITIES  COMMISSION  PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROXY
STATEMENT-PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.



         The date of this Proxy Statement-Prospectus is January 9, 1998.

                                       2
<PAGE>



         NO PERSONS HAVE BEEN  AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS PROXY STATEMENT-PROSPECTUS IN
CONNECTION  WITH THE  SOLICITATION OF PROXIES OR THE OFFERING OF SECURITIES MADE
HEREBY AND, IF GIVEN OR MADE, SUCH  INFORMATION OR  REPRESENTATIONS  MUST NOT BE
RELIED UPON AS HAVING BEEN AUTHORIZED BY ABRAXAS,  VESSELS, OR ANY OTHER PERSON.
THIS  PROXY  STATEMENT-PROSPECTUS  DOES NOT  CONSTITUTE  AN OFFER TO SELL,  OR A
SOLICITATION OF AN OFFER TO BUY, ANY SECURITIES, OR THE SOLICITATION OF A PROXY,
IN ANY  JURISDICTION TO OR FROM ANY PERSON TO WHOM IT IS NOT LAWFUL TO MAKE SUCH
OFFER OR SOLICITATION IN SUCH  JURISDICTION.  NEITHER THE DELIVERY OF THIS PROXY
STATEMENT-PROSPECTUS  NOR ANY  DISTRIBUTION OF SECURITIES MADE HEREUNDER  SHALL,
UNDER ANY CIRCUMSTANCES,  CREATE AN IMPLICATION THAT THERE HAS BEEN NO CHANGE IN
THE AFFAIRS OF ABRAXAS OR VESSELS SINCE THE DATE HEREOF OR THAT THE  INFORMATION
HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO THE DATE HEREOF.

                              AVAILABLE INFORMATION

         Abraxas is subject to the information and reporting requirements of the
Securities  Exchange  Act of 1934,  as  amended  (the  "Exchange  Act"),  and in
accordance  therewith  files  periodic  reports,  proxy  statements,  and  other
information  with the  Commission.  Such reports,  proxy  statements,  and other
information  may be  inspected  and  copied at the public  reference  facilities
maintained by the Commission at 450 Fifth Street,  N.W., Room 1024,  Washington,
D.C.  20549; 7 World Trade Center,  Suite 1300,  New York,  New York 10048;  and
Citicorp Center, 500 West Madison Street,  Suite 1400, Chicago,  Illinois 60661.
The Commission  also maintains a Website,  located at  http://www.sec.gov,  that
contains reports, proxy statements,  and other information regarding registrants
that file  electronically  with the  Commission.  Copies of such reports,  proxy
statements,  and other  information also can be obtained by mail from the Public
Reference Section of the Commission, 450 Fifth Street, N.W., Washington, D.C.
20549, at prescribed rates.

         Abraxas has filed with the  Commission a Registration  Statement  under
the Securities Act on Form S-4 with respect to the secutities offered hereby. As
permitted   under  the   Securities   Act  and  the  Exchange  Act,  this  Proxy
Statement-Prospectus  does not  contain  all the  information  set  forth in the
Registration Statement.  Such additional information can be inspected and copied
or  obtained  from the  Commission  in the manner  described  above.  Statements
contained  in this Proxy  Statement-Prospectus  as to the  contents of any other
document  referred  to  herein  are not  necessarily  complete,  and  each  such
statement  is  qualified  in all respects by reference to the copy of such other
document filed as an exhibit to the Registration Statement.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

         The  following   documents   previously   filed  with  the   Commission
(Commission  file number  0-19118) by Abraxas  pursuant to the  Exchange Act are
incorporated by reference in this Proxy Statement - Prospectus:

         1. Abraxas'  Annual Report on Form 10-K for the year ended December 31,
1996 (which  incorporates by reference  certain  information from Abraxas' Proxy
Statement relating to the 1997 Annual Meeting of Stockholders);

         2. Abraxas' Quarterly Reports on Form 10-Q for the quarters ended March
31, 1997, June 30, 1997 and September 30, 1997.

         3. Abraxas' Current Report on Form 8-K dated June 27, 1997; and

         4.  The   description   of  Abraxas  Common  Stock  set  forth  in  the
registration  statements  filed  pursuant  to  Section  12 of the  Exchange  Act
including  any  amendment  or report  filed for  purposes of  updating  any such
description.

                                       3
<PAGE>

         All documents filed by Abraxas pursuant to Section 13(a),  13(c), 14 or
15(d) of the  Exchange  Act after the date of this Proxy  Statement - Prospectus
and prior to the date of the Special  Meeting shall be deemed to be incorporated
by reference in this Proxy  Statement - Prospectus  and to be a part hereof from
the dates of filing such documents or reports. Any statement contained herein or
in a document  incorporated  or deemed to be  incorporated  herein by  reference
shall be  deemed  to be  modified  or  superseded  for  purposes  of this  Proxy
Statement - Prospectus to the extent that a statement contained herein or in any
other  subsequently  filed document which is also  incorporated  or deemed to be
incorporated herein modifies or supersedes such statement. Any such statement so
modified or superseded shall not be deemed, except as so modified or superseded,
to constitute a part of this Proxy Statement - Prospectus.


         THIS PROXY  STATEMENT-PROSPECTUS  INCORPORATES  DOCUMENTS  BY REFERENCE
WITH RESPECT TO ABRAXAS  THAT ARE NOT  PRESENTED  HEREIN OR DELIVERED  HEREWITH.
ABRAXAS HEREBY  UNDERTAKES TO PROVIDE  WITHOUT CHARGE TO EACH PERSON,  INCLUDING
ANY BENEFICIAL OWNER, TO WHOM A COPY OF THIS PROXY STATEMENT-PROSPECTUS HAS BEEN
DELIVERED,  ON WRITTEN OR ORAL REQUEST OF ANY SUCH PERSON, A COPY OF ANY AND ALL
OF THE DOCUMENTS  REFERRED TO ABOVE THAT HAVE BEEN OR MAY BE  INCORPORATED  INTO
THIS  PROXY  STATEMENT-PROSPECTUS  BY  REFERENCE,  OTHER THAN  EXHIBITS  TO SUCH
DOCUMENTS (UNLESS SUCH EXHIBITS ARE SPECIFICALLY  INCORPORATED BY REFERENCE INTO
SUCH DOCUMENTS).  DOCUMENTS  RELATING TO ABRAXAS ARE AVAILABLE UPON REQUEST FROM
ABRAXAS PETROLEUM CORPORATION, 500 NORTH LOOP 1604 EAST, SUITE 100, SAN ANTONIO,
TEXAS 78232,  ATTENTION:  EXECUTIVE VICE PRESIDENT AND CHIEF FINANCIAL  OFFICER,
TELEPHONE  NUMBER  (210)  490-4788.  IN ORDER TO ENSURE  TIMELY  DELIVERY OF THE
DOCUMENTS, ANY REQUEST SHOULD BE RECEIVED BY FEBRUARY 1, 1998.

                   NOTE REGARDING FORWARD-LOOKING INFORMATION

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


                                       4
<PAGE>
                                TABLE OF CONTENTS

SUMMARY OF PROXY STATEMENT-PROSPECTUS........................................9
         Introduction........................................................9
         The Parties.........................................................9
         Background of and Reasons for the Merger...........................10
         The Special Meeting................................................11
         The Merger.........................................................12
         Risk Factors.......................................................15
         Market Price Data..................................................15
         Summary Historical Financial Information of Vessels................17
         Summary Historical Financial Information of Abraxas................18
         Summary Historical and Pro Forma Reserve
                and Operating Data..........................................20
         Selected Per Share Financial Information...........................21
RISK FACTORS................................................................23
         Merger Considerations..............................................23
         Integration of Operations; Foreign Operations......................23
         High Degree of Leverage............................................23
         Net Losses.........................................................24
         Industry Conditions; Impact on Company's Profitability.............24
         Restrictions Imposed by Terms of the Company's Indebtedness........25
         Substantial Capital Requirements...................................25
         Future Availability of Natural Gas Supply..........................26
         Operating Hazards; Uninsured Risks.................................26
         Competition........................................................26
         Reliance on Estimates of Proved Reserves and Future Net Revenue....27
         Certain Business Risks.............................................27
         Depletion of Reserves..............................................28
         Government Regulation..............................................28
         Dependence on Key Personnel........................................28
         Limitations on the Availability of the Company's
              Net Operating Loss Carryforwards..............................28
THE SPECIAL MEETING.........................................................30
         General............................................................30
         Voting at the Special Meeting......................................30
         Proxies; Revocation................................................30
THE MERGER    32
         Background of the Merger...........................................32
         Abraxas' Reasons for the Merger....................................32
         The Merger Agreement...............................................33
         Restrictions on Resales by Affiliates..............................38
         Escrow of Shares...................................................39
         Board Representation and Voting Agreement..........................39
         Accounting Treatment...............................................40
CERTAIN FEDERAL INCOME TAX CONSEQUENCES.....................................40
INTERESTS OF CERTAIN PERSONS IN THE MERGER..................................43
APPRAISAL RIGHTS............................................................43
CAPITALIZATION..............................................................44
UNAUDITED PRO FORMA FINANCIAL INFORMATION...................................45
UNAUDITED PRO FORMA STATEMENT OF OPERATIONS
         YEAR ENDED DECEMBER 31, 1996.......................................47
UNAUDITED PRO FORMA STATEMENTS OF OPERATIONS
         FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1997.......................48

                                       5
<PAGE>

UNAUDITED PRO FORMA CONDENSED BALANCE SHEET.................................49
NOTES TO UNAUDITED PRO FORMA FINANCIAL INFORMATION..........................50
SELECTED HISTORICAL FINANCIAL DATA OF VESSELS...............................52
VESSELS MANAGEMENT'S DISCUSSION AND ANALYSIS OF
         FINANCIAL CONDITION AND RESULTS OF OPERATIONS......................53
         Results of Operations..............................................53
         Comparison of Nine Months Ended September 30, 1997 to
              Nine Months Ended September 30, 1996..........................53
         Comparison of Year Ended December 31, 1996 to Year
              Ended December 31, 1995.......................................54
         Comparison of Year Ended December 31, 1995 to Year
              Ended December 31, 1994.......................................55
         Liquidity and Capital Resources....................................56
SELECTED HISTORICAL FINANCIAL DATA OF ABRAXAS...............................59
ABRAXAS MANAGEMENT'S DISCUSSION AND ANALYSIS OF
         FINANCIAL CONDITION AND RESULTS OF OPERATIONS......................61
         Results of Operations..............................................61
         Comparison of Nine Months Ended September 30, 1997 to
              Nine Months Ended September 30, 1996..........................61
         Comparison of Year Ended December 31, 1996 to Year
              Ended December 31, 1995.......................................61
         Comparison of Year Ended December 31, 1995 to Year
              Ended December 31, 1994.......................................63
         Liquidity and Capital Resources....................................64
BUSINESS OF ABRAXAS.........................................................70
         General............................................................70
         Recent Developments................................................70
         Primary Operating Areas............................................70
         Texas..............................................................70
         Southwestern Wyoming...............................................72
         Western Canada.....................................................72
         Exploration Opportunities..........................................74
         Exploratory and Developmental Acreage..............................75
         Productive Wells...................................................76
         Reserves Information...............................................76
         Crude Oil, NGLs and Natural Gas Production and Sales Prices........78
         Drilling Activities................................................78
         Markets and Customers..............................................78
         Competition........................................................79
         Regulatory Matters.................................................80
         Title to Properties................................................85
         Employees..........................................................85
         Office Facilities..................................................85
         Other Properties...................................................85
         Litigation.........................................................86
BUSINESS OF VESSELS.........................................................87
         General............................................................87
         Primary Operating Areas............................................87
         Western Colorado...................................................87
         Southwestern Wyoming...............................................87
         Exploration Opportunities..........................................87
         Exploratory and Development Acreage................................88
         Productive Wells...................................................88
         Reserves Information...............................................88

                                       6
<PAGE>

         Drilling Activities................................................90
         Markets and Customers..............................................90
         Competition........................................................91
         Regulatory Matters.................................................91
         Title to Properties................................................91
         Employees..........................................................92
         Office Facilities..................................................92
         Litigation.........................................................92
MANAGEMENT OF ABRAXAS AFTER THE MERGER......................................93
         Directors and Executive Officers...................................93
         Executive Compensation.............................................95
CERTAIN TRANSACTIONS.......................................................100
         Abraxas...........................................................101
         Vessels...........................................................101
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.............104
         Abraxas...........................................................106
         Vessels...........................................................106
DESCRIPTION OF ABRAXAS CAPITAL STOCK.......................................106
         Common Stock......................................................106
         Preferred Stock...................................................106
         Warrants..........................................................106
         Registration Rights...............................................107
         Anti-takeover Effects of Certain Provisions of the Articles
            of Incorporation and Bylaws....................................108
         Stockholder Rights Plan...........................................108
         Anti-takeover Statutes............................................109
         Restrictions on Certain Combinations Between Nevada Resident
              Corporations and Interested Stockholders.....................109
         Nevada Control Share Act..........................................109
COMPARISON OF RIGHTS OF STOCKHOLDERS OF THE COMPANY
         AND STOCKHOLDERS OF VESSELS.......................................110
         Number of Directors...............................................110
         Monetary Liability of Directors...................................111
         Removal of Directors..............................................111
         Amendment of Articles/Certificate of Incorporation................111
CERTAIN DIFFERENCES BETWEEN NEVADA AND
         DELAWARE CORPORATE LAWS...........................................112
         Amendment of Articles/Certificate of Incorporation................112
         Cumulative Voting.................................................112
         Preemptive Rights.................................................112
         Classified Board..................................................112
         Indemnification of Directors and Officers; Insurance..............113
         Limitation on Director Liability..................................113
         Removal of Directors..............................................113
         Inspection of Books and Records...................................114
         Right to Call Special Meetings of Stockholders....................114
         Action Without a Meeting..........................................114
         Mergers, Sales of Assets and Other Transactions...................114
         Provisions Affecting Business Combinations........................115
         Appraisal Rights..................................................116
         Dividends and Stock Repurchase and Redemption.....................117
         Dissolution.......................................................117
LEGAL MATTERS..............................................................118
EXPERTS....................................................................118

                                       7
<PAGE>

STOCKHOLDERS' PROPOSALS....................................................118
GLOSSARY OF TERMS..........................................................119

ANNEX I  AGREEMENT AND PLAN OF MERGER
ANNEX II SECTION 262 OF THE DELAWARE GENERAL CORPORATION LAW


                                       8
<PAGE>



                      SUMMARY OF PROXY STATEMENT-PROSPECTUS

         The following Summary is qualified in its entirety by the more detailed
information  contained in this Proxy  Statement-Prospectus,  its Annexes and the
other  documents  incorporated  by reference  or  otherwise  referred to herein.
Certain  capitalized  terms used in this  summary are defined  elsewhere in this
Proxy Statement-Prospectus. See "Glossary of Terms." Unless otherwise indicated,
all calculations of Abraxas Common Stock upon completion of the Merger set forth
in this  Proxy  Statement-Prospectus  assume  that  no  stockholder  of  Vessels
exercises  appraisal rights and that an aggregate of 1,801,949 shares of Abraxas
Common Stock are issued to Vessels  stockholders.  Except as otherwise indicated
herein,  each  reference  herein to " on a pro forma  basis" shall mean that the
results for the stated period or other information have been adjusted to reflect
the  Merger  and the sale by  Vessels  of the DJ Basin  Properties  (as  defined
herein).

Introduction

         At the Special  Meeting,  the  stockholders of Abraxas will be asked to
consider and vote upon the Merger and the Share Issuance.  Each share of Vessels
Common Stock outstanding immediately prior to the Merger (other than shares held
by stockholders of Vessels, if any, who properly exercise their appraisal rights
under  Delaware law) will be converted  into the right to receive  approximately
30.3 shares of Abraxas Common Stock, of which 7.5 shares of Abraxas Common Stock
will be in consideration  of the Projected  Provisional  Payment.  A copy of the
Agreement and Plan of Merger dated November 12, 1997 (the "Merger Agreement") by
and  among  Abraxas,  Sub and  Vessels  is  attached  as Annex I  hereto  and is
incorporated herein by reference. See "The Merger."

The Parties

         Abraxas  and Sub.  Abraxas is an  independent  energy  company  engaged
primarily in the acquisition,  exploration,  development and production of crude
oil and natural gas.  Since January 1, 1991,  the Company's  principal  means of
growth  has  been  through  the  acquisition  and  subsequent   development  and
exploitation of producing  properties and related assets. The Company utilizes a
disciplined  acquisition strategy,  focusing its efforts on producing properties
and related assets possessing the following characteristics:  a concentration of
operations;  significant,  quantifiable development potential;  historically low
operating  expenses;  and the  potential  to reduce G&A  expenses  per BOE.  The
Company  seeks to  complement  its  acquisition  and  development  activities by
selectively  participating  in exploration  projects with  experienced  industry
partners.  After giving effect to the Merger,  the Company's  principal areas of
operation will be Texas, western Canada,  northwestern Colorado and southwestern
Wyoming and the Company will own interests in 1,041,676 gross acres (547,942 net
acres) and 754 gross wells  (432.7 net wells),  544 of which will be operated by
the  Company.  The  Company  will also own varying  interests  in 20 natural gas
processing plants or compression  facilities.  On a pro forma basis, at December
31,  1996,  the Company had total  proved  reserves of 52,739 MBOE (66%  natural
gas), of which 85.68% was proved developed with a PV-10 of $463.0 million.

         The Company's  acquisition,  development,  exploitation and exploration
activities  have  substantially  increased  the Company's  proved  reserve base,
average daily  production  and natural gas  processing  plant  throughput  while
decreasing its total  operating and G&A expenses per BOE. After  consummation of
the  Merger,  the Company  will have  completed  18  acquisitions  of  producing
properties totaling 56,309 MBOE of proved reserves at an average net acquisition
cost of $4.20 per BOE since  January  1,  1991.  From  January  1,  1991,  on an
historical  basis,  to September 30, 1997,  on a pro forma basis,  the Company's
total proved  reserves  increased from 889 MBOE to 52,739 MBOE;  aggregate PV-10
increased from $11.9 million,  on an historical  basis, to $463.0 million,  on a
pro forma basis; and average net daily production  increased from 0.141 MBOE per
day, on an historical  basis,  to 16.4 MBOE per day, on a pro forma basis. As of
September 30, 1997, the Company had net natural gas  processing  capacity of 128
MMcf per day. From the year ended December 31, 1991, on an historical  basis, to
the nine months ended  September 30, 1997,  on a pro forma basis,  the Company's
direct operating  expenses per BOE decreased from $6.30 per BOE to $2.71 per BOE
and G&A expenses per BOE decreased from $5.39 per BOE to $0.80 per BOE.

                                       9
<PAGE>

         The Company was founded in 1977 by Robert L.G.  Watson,  the  Company's
Chairman of the Board,  President  and Chief  Executive  Officer.  The Company's
principal  offices  are  located  at 500 North Loop 1604  East,  Suite 100,  San
Antonio, Texas 78232 and its telephone number is (210) 490-4788.

         Sub is a wholly-owned  subsidiary of Abraxas  incorporated  in November
1997 in the State of Delaware solely for the purpose of effecting the Merger.

         Vessels.  Vessels  is an  independent  energy  company  engaged  in the
acquisition,  exploration,  development, production and gathering of natural gas
and crude oil. From its  predecessor's  inception in the 1970's until the spring
of  1997,  Vessels'  core  operations  were  in the  Denver-Julesburg  Basin  in
northeast Colorado (the "DJ Basin").  Beginning in 1993, Vessels began to slowly
diversify its production base outside the DJ Basin by the selective  acquisition
of mineral  leases and  producing  properties  in other Rocky  Mountain  basins.
Because of the growth  potential of its other  properties  and a more  favorable
acquisition market outside the DJ Basin,  Vessels elected, in late 1996, to sell
its DJ Basin  properties  (the "DJ Basin  Properties")  and focus its efforts on
higher  potential  growth  opportunities   elsewhere.  In  April  1997,  Vessels
completed the sale for cash of its DJ Basin producing, gathering, processing and
marketing business.  Sales proceeds were used to extinguish Vessels' debt to its
lenders at such time and fund an  aggressive  1997 capital  expenditure  program
primarily focused on drilling in western Colorado.

         Vessels owns interests in 73 producing wells and 159,600 gross (139,100
net)  acres of mineral  leases.  Vessels  operates  all wells in which it has an
interest, as well as 100 miles of gas gathering pipelines.

         Vessels employs 27 persons full-time. Its principal offices are located
in  Suite  2000,  1050  Seventeenth  Street,  Denver,  Colorado  80265,  and its
telephone number is (303) 825-3500

Background of and Reasons for the Merger

         Vessels,  in 1996,  coincident  with the pending  divestiture of the DJ
Basin Properties,  began to review strategic  alternatives that would expose its
stockholders to growth potential in the hydrocarbon extraction sector. To assist
in reviewing strategic  alternatives,  Vessels engaged Weisser Johnson & Co., an
investment banking firm located in New York and Houston ("Weisser Johnson"),  in
April 1997.  After an extensive  review of Vessels and  industry  opportunities,
Vessels  determined that a stock for stock,  tax-free exchange would be the most
practical manner to enhance stockholder value.

         Since  January 1,  1991,  Abraxas'  principal  means of growth has been
through the acquisition and subsequent development and exploitation of producing
properties  and  related  assets.  Abraxas  utilizes a  disciplined  acquisition
strategy  focusing  its  efforts on  producing  properties  and  related  assets
possessing  the  following  characteristics:   a  concentration  of  operations;
significant,  quantifiable  development  potential;  historically  low operating
expenses; and the potential to reduce G&A expenses per BOE.

         Between April 1997 and May 1997, Weisser Johnson worked with Vessels to
pursue a stock merger and contacted several potential merger candidates.  One of
these  candidates  was Abraxas,  which  learned of Vessels'  interest in a stock
merger through discussions with Weisser Johnson in April 1997.

         On May 30, 1997, Robert L. G. Watson, President of Abraxas, met with W.
M.  Neumann,  President  and CEO of  Vessels,  and Scott  Johnson,  a partner of
Weisser  Johnson,  to discuss the nature of Abraxas' and  Vessels'  business and
explore the strategic value of a merger.

         Shortly  thereafter,  Mr. Watson  advised Mr. Johnson that based on the
earlier  discussions,  Abraxas would  appreciate  further and more in-depth data
about Vessels and expressed a willingness  to convey similar  information  about
Abraxas.

         After  execution of a  confidentiality  agreement,  representatives  of
Vessels and Abraxas met in San Antonio on June 18, 1997 for the further exchange
of information.

                                       10
<PAGE>

Following  the meeting on June 18, 1997,  Frank  Weisser,  a partner in
Weisser  Johnson,  advised  Mr.  Watson  of  Vessels'  interests  in  furthering
conversations regarding a merger. As a result, on July 3, 1997 Abraxas forwarded
a  proposal  for a  transaction  structure.  After  further  discussion  of  the
transaction structure, Abraxas forwarded a proposed letter of intent regarding a
merger and after further  negotiation,  on August 19, 1997, the parties  entered
into a letter  of intent  providing  for the  conducting  of due  diligence  and
negotiation of a definitive merger agreement.

         Abraxas'  review of  Vessels'  business  indicated  that  ownership  of
Vessels'  properties would be consistent with Abraxas'  disciplined  acquisition
strategy.

         Vessels'  review of Abraxas'  business and of the proposed merger steps
indicated that Vessels' objectives of diversifying  project risk while retaining
some  exposure  to  its  properties'   growth  potential  would  be  efficiently
accomplished through the merger.

         On November 12, 1997, the Merger Agreement was executed by the parties.

The Special Meeting

         Date, Time and Place.  The Special Meeting will be held on February 13,
1998 at 9:00 a.m.,  local time, at Abraxas'  offices,  500 North Loop 1604 East,
Suite 100, San Antonio, Texas 78232.

         Purpose.   The  purpose  of  the  Special   Meeting  is  for   Abraxas'
stockholders  to consider and vote upon a proposal to approve the Merger and the
Share Issuance. See "The Special Meeting."

         Abraxas'  stockholders  must  approve  the Share  Issuance  in order to
comply with the  requirements  of the Nasdaq National  Market.  Under the Nasdaq
National Market's stockholder approval policy, stockholder approval generally is
required  prior to the issuance of  securities  when common stock or  securities
convertible  into common stock are to be issued in any  transaction or series of
related  transactions  if (i) upon  issuance  the common  stock will have voting
power equal to or in excess of 20% of the voting  power  outstanding  before the
issuance of such stock or convertible securities or (ii) the number of shares of
common  stock to be issued will be equal to or in excess of 20% of the number of
shares of common stock outstanding before such issuance.

         Record Date; Stockholders Entitled to Vote. Holders of record of shares
of Abraxas Common Stock at the close of business on January 6, 1998 (the "Record
Date") will be entitled to notice of and to vote at the Special Meeting.  At the
close of business on the Record Date,  6,422,540  shares of Abraxas Common Stock
were issued and outstanding. See "The Special Meeting."

         Required Vote. The affirmative vote of the holders of a majority of the
outstanding shares of Abraxas Common Stock is required to approve the Merger and
the Share  Issuance.  Each share of Abraxas Common Stock is entitled to one vote
in connection with the approval of the Merger and the Share Issuance.  As of the
Record Date,  Abraxas'  directors and executive officers exercised voting power,
directly and indirectly,  over an aggregate of  approximately  646,586 shares of
Abraxas  Common  Stock or  approximately  10.07%  of the  outstanding  shares of
Abraxas Common Stock.  Abraxas'  directors and executive officers have agreed to
vote their  shares of Abraxas  Common Stock in favor of the Merger and the Share
Issuance.  See "The  Special  Meeting - Voting at the Special  Meeting" and "The
Merger - Board Representation and Voting Agreement."

         The  affirmative  vote of the  holders  of  approximately  71.0% of the
outstanding  shares of Vessels  Common  Stock is required to approve the Merger.
Each share of Vessels  Common Stock is entitled to one vote in  connection  with
the  approval of the Merger.  The record  date to  determine  holders of Vessels
Common  Stock  entitled to vote on the Merger is January 6, 1998.  On that date,
34,136.24  shares  of  Vessels  Common  Stock  were  outstanding,  and  Vessels'
directors,  executive  officers and their  affiliates  exercised  voting  power,
directly or  indirectly,  over an aggregate of  approximately  29,979  shares of
Vessels Common Stock or approximately  88% of the outstanding  shares of Vessels
Common Stock.  Vessels' directors and executive officers have not agreed to vote

                                       11
<PAGE>

their  shares of Vessels  Common  Stock in favor of the Merger.  See "The Merger
Conditions to the Merger."

         Revocation of Proxies.  Any proxy given  pursuant to this  solicitation
may be revoked by the person  giving it at any time before the proxy is voted at
the  Special  Meeting.  A proxy may be revoked by filing with the  Secretary  of
Abraxas  prior to the voting of the proxy either a written  instrument  revoking
the proxy or an executed  proxy  bearing a later date, or by voting in person at
the Special  Meeting.  Attendance  at the Special  Meeting  will not, in itself,
constitute  the  revocation  of a proxy.  See "The  Special  Meeting -  Proxies;
Revocation."

The Merger

         General.  On the terms and subject to the  conditions  set forth in the
Merger Agreement,  Sub will be merged with and into Vessels,  with Vessels being
the  surviving  corporation  in the Merger.  At the  Effective  Time,  each then
outstanding  share of common  stock of Sub will be  converted  into one share of
Vessels, which will thereby become a wholly-owned subsidiary of Abraxas.

         Conversion of Vessels Shares. At the Effective Time of the Merger, each
then  outstanding  share of Vessels  Common  Stock  (other  than  shares held by
stockholders of Vessels,  if any, who properly  exercised their appraisal rights
under  Delaware law) will be converted  into the right to receive  approximately
22.8 shares of Abraxas  Common  Stock plus a number of shares of Abraxas  Common
Stock  equal to a fraction,  the  numerator  of which is  Vessels'  Non-PDP/PDNP
EBITDX (as defined herein),  which is equal to $4,364,415,  times .80 times 5.33
minus the amount  payable by Vessels to Weisser  Johnson on April 30, 1999,  and
the denominator of which is $18.00 (the "Projected  Provisional  Payment").  The
Projected  Provisional Payment entitles the Vessels stockholders to an aggregate
of approximately 1,023,543 shares of Abraxas Common Stock or approximately 29.98
shares of Abraxas  Common Stock for each share of Vessels  Common Stock.  Of the
shares of Abraxas  Common Stock  issued  pursuant to the  Projected  Provisional
Payment,  25%, or an aggregate of approximately 255,886 shares of Abraxas Common
Stock (or  approximately  7.5 shares of Abraxas  Common  Stock for each share of
Vessels  Common  Stock),  will be issued at the Effective Time and the remainder
will be  issued  and  deposited  into the  Provisional  Payment  Escrow.  On the
Provisional  Payment Date, Abraxas will release that number of shares of Abraxas
Common Stock from the  Provisional  Payment  Escrow as are  necessary to pay the
Provisional  Payment  in full.  In the event  that the  Provisional  Payment  is
greater than the Projected Provisional Payment,  Abraxas will release all of the
shares  deposited  into  the  Provisional  Payment  Escrow  and will  issue  any
additional shares necessary to make the Provisional  Payment.  In the event that
the  Provisional  Payment is less than the  Projected  Provisional  Payment,  an
appropriate  number of shares of Abraxas  Common  Stock will be  released to the
Vessels  stockholders  from the  Provisional  Payment  Escrow with the remainder
being returned to Abraxas. Pursuant to the terms of the Merger Agreement, if the
amount of the  Provisional  Payment is the same as the  amount of the  Projected
Provisional  Payment,  Abraxas  is  required  to issue a total of  approximately
1,801,949  shares of Abraxas Common Stock in the Merger.  Abraxas is seeking the
approval of its  stockholders  to issue a total of  1,900,000  shares of Abraxas
Common Stock in the Merger in order to cover any additional shares Abraxas would
be required to issue if the  Provisional  Payment is greater than the  Projected
Provisional  Payment as well as to  reserve a total of 12,190  shares of Abraxas
Common  Stock for  issuance  pursuant  to the  exercise  of certain  warrants to
purchase  Vessels  Common Stock which,  upon  consummation  of the Merger,  will
become warrants to purchase  Abraxas Common Stock.  See  "Description of Abraxas
Common Stock - Warrants."

         For example, pursuant to the terms of the Merger Agreement,  Abraxas is
required to issue to the Vessels stockholders a total of approximately 1,023,543
shares of Abraxas  Common Stock in  consideration  of the Projected  Provisional
Payment,  of which a total of  approximately  255,886  will be  delivered at the
Effective  Time  directly  to the  Vessels  stockholders  and  767,657  will  be
deposited  into the  Provisional  Payment  Escrow.  If the  Provisional  Payment
entitled the Vessels stockholders to an aggregate of 1,000,000 shares of Abraxas
Common Stock,  744,114  shares of Abraxas  Common Stock which had been deposited
into  the   Provisional   Payment  Escrow  would  be  released  to  the  Vessels
stockholders and 23,543 shares would be returned to Abraxas.

         Under the Merger Agreement,  the Vessels'  Non-PDP/PDNP  EBITDX for the
Projected  Provisional  Payment  was  determined  based upon the  average of the
earnings  before  interest,  taxes,  depreciation,  depletion  and  amortization
("EBITDX")  estimated in the reserve  reports  prepared by Vessels'  independent

                                       12
<PAGE>

petroleum engineers, Netherland, Sewell & Associates ("NSA"), and an engineering
firm jointly engaged by Abraxas and Vessels with respect to Vessels'  properties
("Non-PDP/PDNP  Properties")  other than proved developed  producing ("PDP") and
proved developed non-producing ("PDNP") properties. The Provisional Payment will
be based upon Vessels'  Non-PDP/PDNP EBITDX for the period from February 1, 1998
to January  31,  1999.  Under the terms of the Merger  Agreement,  "Non-PDP/PDNP
EBITDX" is defined as the EBITDX (or projected EBITDX for the wells deemed to be
productive  as total  undrilled  locations at a rate equal to the average of the
first  month's  EBITDX for the wells in the proved  undeveloped  reserves in the
reserve  report of Vessels  prepared by NSA) plus any allocated  fixed  facility
operating  expenses  utilized in  determining  EBITDX and plus any allocated G&A
expenses utilized in determining  EBITDX for the period from February 1, 1998 to
January  31,  1999,   produced  or  deemed  to  be  produced  from  the  Vessels
Non-PDP/PDNP  Properties  which are drilled pursuant to the Development Plan (as
defined below) or constituted total undrilled locations in the Development Plan.
Under the  Development  Plan (the  "Development  Plan") agreed to by Vessels and
Abraxas in connection with the Merger  Agreement,  Abraxas is obligated to drill
and, if commercially  feasible,  complete and initiate  production from wells on
the Non-PDP/PDNP  Properties in accordance with a specified  schedule from which
Vessels' Non-PDP/PDNP EBITDX will be determined.

         Escrow of Shares.  At the Closing,  Abraxas and a representative of the
stockholders  of  Vessels  (the  "Representative")  will  enter  into an  escrow
agreement  (the  "Escrow  Agreement")  pursuant to which an aggregate of 472,222
shares of Abraxas  Common  Stock  (the  "Escrow  Shares")  will be issued to the
Vessels  stockholders  and deposited  into a separate  escrow  account to secure
certain  reimbursement  obligations  of the  stockholders  of Vessels to Abraxas
relating to the breach of certain  representations  and  warranties set forth in
the Merger Agreement and certain  liabilities of Vessels arising under a natural
gas supply contract between Vessels and a third party (the "Supply Contract").

         The Escrow Shares include 388,889 shares of Abraxas Common Stock issued
to the Vessels  stockholders  which will be collateral for claims related to the
Supply Contract (the "Supply Contract Escrow Shares").  These shares will not be
deposited  into the escrow  account if the Supply  Contract  is  Terminated  (as
defined in the Escrow Agreement) prior to Closing. If the Supply Contract is not
Terminated  prior to Closing,  however,  the Supply  Contract Escrow Shares will
remain in escrow and be subject to certain claims by Abraxas for damages related
to the Supply Contract.  The Supply Contract Escrow Shares,  and any Escrow Cash
Payment (as defined  herein),  will be released to the Vessels  stockholders  15
days after the Termination of the Supply Contract,  provided a sufficient number
of shares will  remain in escrow as  collateral  for any  pending or  unresolved
claims related to the Supply  Contract until such claims are resolved.  See "The
Merger -- Escrow of Shares."

         Board  Representation  and  Voting  Agreement.  Pursuant  to  a  voting
agreement  between  Vessels and each of the executive  officers and directors of
Abraxas (the "Voting  Agreement"),  each of the executive officers and directors
of Abraxas has agreed to vote any shares of Abraxas Common Stock owned by him in
favor of the Merger and the Share  Issuance at the  Special  Meeting and to vote
for Robert F.  Semmens as a director  of Abraxas at the 1998  Annual  Meeting of
Stockholders for a three-year term.

         Pursuant to an agreement  (the "Letter  Agreement")  to be executed and
delivered  at the  Closing (as  defined  herein),  Abraxas has agreed to appoint
Robert F.  Semmens to the Board of  Directors at the Closing and to nominate Mr.
Semmens as a director of Abraxas at the 1998 Annual Meeting of Stockholders  for
a three-year  term and each  subsequent  annual meeting of the  stockholders  of
Abraxas  beginning  with the 2001  Annual  Meeting  until  the  later of (i) the
release  of  all  of  the  Escrow  Shares,  (ii)  the  receipt  by  the  Vessels
stockholders of the Provisional  Payment or (iii) the date upon which The Beacon
Group Energy  Investment  Fund, L.P.  ("Beacon") or its affiliates no longer own
15% or more of the  aggregate  number of votes  which may be cast by  holders of
those  securities  outstanding  of Abraxas which entitle the holders  thereof to
vote generally on all matters submitted to Abraxas' securityholders for a vote.

         Conditions  to the Merger.  The  obligations  of the Company,  Sub, and
Vessels  to  consummate  the  Merger  are  subject  to a number  of  conditions,
including  approval  and  adoption  of  the  Merger  Agreement  by  the  Vessels
stockholders  and the  approval  of the  Merger  and the Share  Issuance  by the
Abraxas  stockholders.  No assurance can be given that such  conditions  will be
satisfied.  If the Closing has not occurred prior to February 28, 1998,  each of
Vessels and Abraxas has the right to terminate the Merger  Agreement.  There are

                                       13
<PAGE>

no federal,  state or other regulatory  requirements that remain to be satisfied
in order to consummate the Merger,  other than the filing of the  Certificate of
Merger by Sub and Vessels, respectively. See "The Merger -- The Merger Agreement
- -- Conditions to the Merger."

         Effective  Time.  Immediately  after  the  Merger  Agreement  has  been
approved  and the  satisfaction  or waiver of all the  conditions  precedent  to
effectuate the Merger Agreement has occurred (the  "Closing"),  a Certificate of
Merger shall be filed in accordance  with the Delaware  General  Corporation Law
(the  "Delaware  Statute" or the "DGCL") and at the Effective  Time,  the Merger
shall become effective.

         Conduct of  Business  of Vessels  and  Abraxas.  Pursuant to the Merger
Agreement,  Vessels and Abraxas  have each  agreed to conduct  their  respective
businesses  prior to the  Closing  only in the  ordinary  and usual  course and,
subject to certain  exceptions,  not to make certain changes in their respective
operations  or  corporate   structure,   including   amending  their  respective
organizational  documents  or  entering  into  any  contract  other  than in the
ordinary course of business.  See "The Merger Agreement - Conduct of Business of
Vessels and Abraxas."

         Amendment and Termination of Merger Agreement. The Merger Agreement may
be terminated at any time prior to the Closing by (i) the mutual  consent of the
Boards of  Directors  of Vessels  and  Abraxas,  (ii)  Abraxas or Vessels if the
Closing has not occurred on or before February 28, 1998; provided, however, that
this right to terminate  shall not be  available  to any party whose  failure to
fulfill any obligation,  covenant or condition was the cause of, or resulted in,
the  failure of the Closing to occur on or before  such date;  (iii)  Abraxas or
Vessels if a court of competent  jurisdiction or other  governmental  body shall
have  issued an  order,  decree or  ruling  or taken  any  action  enjoining  or
prohibiting  the Merger and such order,  decree,  ruling or other  action  shall
become  final and  non-appealable;  (iv)  Abraxas,  Sub or Vessels if any of its
conditions to Closing could not be satisfied prior to February 28, 1998,  unless
the failure to satisfy such  condition  resulted from such  parties'  failure to
perform in any  material  respect a material  covenant or agreement or from such
party's breach of a material  representation  or warranty;  (v) Abraxas,  Sub or
Vessels if the  stockholders  of either  Vessels or Abraxas do not  approve  the
Merger;  or (vi)  Vessels if the  executive  officers  and  directors of Abraxas
breach the Voting  Agreement.  The Merger  Agreement  may be amended only by the
written agreement of Abraxas, Sub and Vessels. In certain circumstances,  either
Vessels or Abraxas  will be required to pay the other a fee of $1.5 million upon
the  termination  of  the  Merger  Agreement.   See  "The  Merger  Agreement  --
Termination", "--Effect of Termination" and " -- Amendment and Modification."

         Appraisal Rights. Under the DGCL, appraisal rights will be available to
holders of Vessels Common Stock in connection  with the Merger.  Any such holder
desiring to exercise  appraisal  rights must  follow  precisely  the  procedures
prescribed  by the DGCL.  The holders of Abraxas  Common Stock will not have any
appraisal  rights in  connection  with the  Merger or the  Share  Issuance.  See
"Appraisal Rights" and Annex II.

         Recommendation  of  Abraxas.  The Board of  Directors  of  Abraxas  has
unanimously approved the Merger Agreement and believes that the Merger is in the
best  interests  of  Abraxas  and its  stockholders.  Accordingly,  the Board of
Directors of Abraxas  recommends that  stockholders of Abraxas vote FOR approval
of the Merger and the Share  Issuance.  For a discussion of the various  factors
the Abraxas' Board considered in determining its recommendation, see "The Merger
- - Abraxas' Reasons for the Merger."

         Interest of Certain Persons in the Merger.  If approved by the Abraxas'
stockholders,  Robert F.  Semmens  will  become a  director  of  Abraxas  at the
Closing.  Mr.  Semmens is  currently  a director of Vessels and a partner of the
entities that control VOG Holdings,  LLC,  Vessels'  majority  stockholder.  See
"Management of Abraxas After the Merger."

         In  addition,  the Merger  Agreement  provides  for  certain  officers,
directors  and other  employees of Vessels to continue to receive or be eligible
for certain benefits and other matters following the Closing.  See "Interests of
Certain Persons in the Merger."

         Accounting Treatment. The Merger will be accounted for as a purchase of
Vessels by Abraxas in accordance with the "Accounting  Principles  Board Opinion
No. 16-Business Combinations."

                                       14
<PAGE>

         Certain Federal Income Tax Consequences. The Merger is intended to be a
tax-free  transaction for federal income tax purposes to Abraxas,  Sub,  Vessels
and the Vessels stockholders; however, no rulings have been or will be requested
from the Internal  Revenue Service (the "IRS")  regarding the Merger.  Under the
Merger  Agreement,  Abraxas and Vessels have each agreed to use its best efforts
to  qualify  the  Merger as a  tax-free  reorganization.  An  opinion of counsel
concerning  certain  federal  income tax  consequences  of the Merger  discussed
herein will be delivered in  connection  with the Merger.  See "Certain  Federal
Income Tax Consequences of the Merger."

         Each holder of Vessels  Common Stock should  consult his or her own tax
advisor  regarding the tax  consequences of the Merger in light of such holder's
own situation,  including the application and the effect of any state,  local or
foreign income and other tax laws.

Risk Factors

         For  information  regarding  certain  factors that should be considered
carefully in determining  whether to vote for approval of the Merger  Agreement,
see "Risk Factors."

Market Price Data

         Abraxas  Common  Stock is traded in the  Nasdaq  National  Market.  The
following table sets forth, for the periods indicated, the range of the high and
low bid  quotations  for  Abraxas  Common  Stock.  Information  with  respect to
over-the-counter  bid quotations  represents  prices between  dealers,  does not
include retail  mark-ups,  mark-downs or  commissions,  and does not necessarily
represent actual transactions.

Period                                                  High               Low

1994

     First Quarter                                      $13.50            $9.00
     Second Quarter                                      13.50             9.75
     Third Quarter                                       13.13             9.00
     Fourth Quarter                                      11.50             9.25

1995
     First Quarter                                      $10.25            $8.50
     Second Quarter                                       9.63             8.00
     Third Quarter                                        8.88             7.94
     Fourth Quarter                                       8.88             6.13

1996
     First Quarter                                     $  7.75            $4.13
     Second Quarter                                       7.25             5.00
     Third Quarter                                        7.13             4.75
     Fourth Quarter                                      10.50             5.75

1997
     First Quarter                                      $14.00            $8.88
     Second Quarter                                      14.13            10.00
     Third Quarter                                       15.75            12.50
     Fourth Quarter                                      19.50            13.88

1998
     First Quarter (through January 8, 1998)            $14.50           $13.75

                                       15
<PAGE>

         As of November 11, 1997, the date before the public announcement of the
Merger,  the high and low sales  prices of Abraxas  Common Stock were $18.00 and
$17.75 per share, respectively. As of January 8, 1998, the closing sale price on
the Nasdaq  National  Market for the  Abraxas  Common  Stock was  $13.75.  As of
January 6, 1998, there were approximately 1,874 holders of record of the Abraxas
Common  Stock.  Abraxas has never  declared or paid any  dividends to holders of
Abraxas  Common  Stock and has no present  intention  to pay cash  dividends  to
holders of Abraxas Common Stock in the future.  Under the terms of the Indenture
(as defined herein) and the Credit Agreement (as defined herein), the payment of
dividends is prohibited.

         There is no  established  trading  market for the Vessels Common Stock.
There were 18 holders of record of Vessels  Common  Stock as of January 6, 1998.
Vessels has not paid its stockholders any cash dividends and does not anticipate
paying any dividends in the foreseeable future.



                                       16
<PAGE>

               Summary Historical Financial Information of Vessels

         The following table presents summary historical  consolidated financial
data of Vessels  for the five years ended  December  31,  1996,  which have been
derived from the audited consolidated financial statements of Vessels, and as of
and for the nine  months  ended  September  30,  1996 and 1997,  which have been
derived from Vessels' unaudited  consolidated  historical financial  statements.
The  historical  consolidated  financial  data of Vessels as of and for the nine
months ended September 30, 1996 and 1997 have been derived from Vessels' interim
consolidated  financial  statements  which,  in the  opinion  of  management  of
Vessels,  have  been  prepared  on the same  basis as the  audited  consolidated
financial  statements  and include all  adjustments  (consisting  of only normal
recurring  adjustments)  necessary for a fair presentation of the financial data
for such periods.  The  statement of  operations  data for the nine months ended
September 30, 1997 is not necessarily indicative of results for a full year. The
information  in  this  table  should  be  read  in  conjunction  with  "Vessels'
Management's  Discussion  and  Analysis of  Financial  Condition  and Results of
Operations,"   "Selected   Historical   Financial   Data  of  Vessels"  and  the
Consolidated  Financial  Statements  of Vessels and the notes  thereto  included
elsewhere in this Proxy Statement-Prospectus.
<TABLE>
<CAPTION>

                                                                                                
                                                                                                 Nine Months Ended
                                                    Year Ended December 31,                        September 30,
                                    -------------------------------------------------------  -------------------------
                                        1992       1993      1994       1995       1996         1996        1997
                                    -------------------------------------------------------- -------------------------
                                                        (dollars in thousands, except for ratios)
<S>                                    <C>         <C>       <C>        <C>        <C>          <C>         <C>    
Consolidated Statement of
   Operations Data:
     Total operating revenue (1)       $47,928     $45,654   $46,429    $53,659    $53,421      $35,660     $22,555
     Operating expense (2)              39,834      35,495    35,671     38,590     38,178       25,164      15,130
     DD&A expense                        3,343       3,503     6,146     11,358      9,754        6,733       5,737
     Exploration expense                     -           -       223        272      1,713          300         914
     G&A expense                         2,189       3,410     3,095      3,399      3,238        2,413       2,223
     Interest expense                    1,617       2,580     5,321      2,388      3,473        2,387       1,503
     Amortization     of    deferred       387         468        13        183        917          147          92
       financing fee
     Income       (loss)      before       221          16    (2,503)    (2,296)    (3,030)        (794)     (3,106)
       extraordinary items
     Net income (loss)                     221          16    (4,006)    (2,296)    (3,030)        (794)     (3,106)
</TABLE>
<TABLE>
<CAPTION>

                                                                                                        September 30,
                                                                                                            1997
                                                                                                        --------------
                                                                                                         (dollars in
                                                                                                          thousands)

<S>                                                                                                         <C>    
Consolidated Balance Sheet Data:
Cash and cash equivalents                                                                                   $   991
Total assets                                                                                                 48,085
Total debt (3)                                                                                                  337
Shareholders' equity                                                                                         34,993
</TABLE>

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

(1)  Consists of crude oil and  natural gas  production  sales,  gas  gathering,
     processing and marketing revenues, and other miscellaneous revenue.
(2) Consists of lease operating and production taxes, gas gathering, processing,
and marketing expenses. (3) Consists of current and long-term portion of capital
lease obligations.

                                       17
<PAGE>


               Summary Historical Financial Information of Abraxas

         The following table presents summary historical  consolidated financial
data of the Company for the five years ended December 31, 1996 and as of and for
the nine months ended September 30, 1996 and 1997,  which have been derived from
the Company's consolidated financial statements and unaudited historical and pro
forma  financial  data. The unaudited Pro Forma  Statement of Operations for the
year ended December 31, 1996 reflects the acquisition of the Wyoming  Properties
(as defined  herein),  acquired on September 30, 1996;  the  acquisition of CGGS
Canadian Gas Gathering Systems Inc. ("CGGS"), acquired on November 14, 1996; the
acquisition of the Portilla Field  ("Portilla")  and the Happy Field  ("Happy"),
acquired on November 14, 1996; the  acquisition  of the 50%  overriding  royalty
interests  in the East White Point Field  ("East  White  Point") and the Stedman
Island Field ("Stedman Island"),  acquired in November 1996; the sale by Vessels
of the DJ  Basin  Properties;  and the  Merger,  as if all were  consummated  on
January 1, 1996.  The unaudited Pro Forma  Statement of Operations  for the nine
months ended  September  30, 1997 reflects  such  adjustments  as if the sale by
Vessels of the DJ Basin  Properties  and the Merger had  occurred  on January 1,
1997. The unaudited Pro Forma Condensed  Balance Sheet reflects such adjustments
as if the Merger had occurred at September 30, 1997. The historical consolidated
financial data of the Company as of and for the nine months ended  September 30,
1996  and  1997  have  been  derived  from the  Company's  interim  consolidated
financial  statements  which, in the opinion of management of the Company,  have
been prepared on the same basis as the audited consolidated financial statements
and include all adjustments  (consisting of only normal  recurring  adjustments)
necessary for a fair  presentation  of the financial data for such periods.  The
statement of operations data for the nine months ended September 30, 1997 is not
necessarily indicative of results for a full year. The information in this table
should be read in conjunction with "Abraxas Management's Discussion and Analysis
of  Financial  Condition  and  Results  of  Operations,"   "Selected  Historical
Financial Data of Abraxas," the Consolidated Financial Statements of the Company
and the notes thereto and the Unaudited Pro Forma Financial  Information and the
notes thereto included elsewhere in this Proxy Statement-Prospectus.
<TABLE>
<CAPTION>

                                                                                         
                                                                                           Nine Months Ended     
                                           Year Ended December 31,                           September 30,
                            ------------------------------------------------------  ---------------------------------
                                                                        Pro Forma                       Pro Forma
                              1992     1993    1994     1995     1996     1996(1)      1996       1997    1997(2)
                            ------------------------------------------------------  ---------------------------------
                                  (dollars in thousands, except for ratios)
<S>                           <C>     <C>     <C>      <C>      <C>       <C>       <C>        <C>        <C>    
Consolidated Statement of
   Operations Data:
     Total operating
       revenue (3)            $2,691  $7,494  $11,349  $13,817  $26,653   $68,972   $11,909    $50,691    $60,187
     Operating expense (4)     1,075    2,964   3,826    4,458    6,289    19,264      3,408    12,009     17,339
     DD&A expense                957    2,373   3,790    5,434    9,605    25,520      4,145    19,780     22,420
     G&A expense                 770      510     810    1,042    1,933     3,755      1,250     3,119      3,596
     Interest expense            906    2,531   2,359    3,911    6,241    23,331      2,142    18,757     18,750
     Amortization of
     deferred financing fee        -      649     400      214      280     1,249        192       933      1,025
     Income (loss) from
       continuing
       operations before 
       extraordinary items    (1,072)  (1,580)    113   (1,208)   8,826    (1,863)       122    (2,598)    (1,696)
     Preferred stock 
       dividends                (249)    (186)   (183)    (366)    (366)     (366)      (274)     (183)      (183)
     Net  income(loss)
      applicable to  common
      stockholders            (4,204)  (2,619) (2,577)  (1,574)   1,147    (2,229)      (520)   (2,781)    (1,879)
     
</TABLE>


                                       18
<PAGE>

<TABLE>
<CAPTION>


                                                                                         September 30, 1997
                                                                                   Historical    Pro Forma (5)
                                                                                   --------------------------------
                                                                                       (dollars in thousands)
<S>                                                                                   <C>            <C> 
Consolidated Balance Sheet
   Data:
     Cash and cash equivalents                                                        $ 7,559        $ 8,550
     Total assets                                                                     317,182        345,339
     Total debt (6)                                                                   217,573        217,845
     Shareholders' equity                                                              32,126  (7)    42,243  (8)

</TABLE>
- -------------------

(1)  Reflects the acquisitions of the Wyoming  Properties,  CGGS,  Portilla,
     Happy, the 50% overriding  royalty interest in East White Point and Stedman
     Island, the sale by Vessels of the DJ Basin Properties and the Merger as if
     they occurred on January 1, 1996.
(2)  Reflects the sale by Vessels of the DJ Basin  Properties  and the Merger as
     if they occurred on January 1, 1997.
(3)  Consists of crude oil and natural gas  production  sales,  revenue from rig
     operations and processing facilities, and other miscellaneous revenue.
(4)  Consists of lease operating and production  taxes, rig operating  expenses,
     and  processing  expenses.
(5)  Reflects the Merger as if it occurred at September  30, 1997.
(6)  Consists of long-term debt, including capital lease obligations.
(7)  Consists of 6,324,730  shares of Abraxas'  Common Stock of which 53,023 are
     treasury shares.
(8)  Consists of 6,886,797  shares of Abraxas'  Common Stock of which 53,023 are
     treasury shares.

                                       19
<PAGE>


           Summary Historical and Pro Forma Reserve and Operating Data

         The following table sets forth summary  information with respect to the
Company's  estimated proved crude oil, NGLs and natural gas reserves and certain
summary  information  with respect to the Company's  operations  for the periods
indicated.  See  "Abraxas  Management's  Discussion  and  Analysis of  Financial
Condition  and Results of  Operations,"  the  Company's  Consolidated  Financial
Statements  and  the  notes  thereto  and  the  Unaudited  Pro  Forma  Financial
Information   and  the  notes   thereto   included   elsewhere   in  this  Proxy
Statement-Prospectus.  The pro forma  reserve  data at  December  31, 1996 gives
effect to the sale by  Vessels of the DJ Basin  Properties  and the Merger as if
they had occurred on December 31, 1996.  The pro forma  operations  data for the
year ended  December  31, 1996 gives effect to the  acquisitions  of the Wyoming
Properties,  CGGS, Portilla,  Happy, the 50% overriding royalty interest in East
White  Point  and  Stedman  Island  and the  sale  by  Vessels  of the DJ  Basin
Properties  and the  Merger as if they  occurred  on January 1, 1996 and the pro
forma  operations  data for the nine months ended September 30, 1997 give effect
to the sale by Vessels of the DJ Basin  Properties and the Merger as if they had
occurred on January 1, 1997.

                                        Historical              
                                 --------------------------    Pro Forma
                                   1994     1995     1996       1996 (1)
                                 ---------------------------------------
Estimated Proved Reserves
   (period-end):
   Crude oil and NGLs (MBbls)      9,156    8,267    18,036      18,967  (1)(2)
   Natural gas (MMcf)             67,579   54,569   177,260     202,633  (1)(2)
   Crude oil equivalents (MBOE)   20,420   17,362    47,579      52,739  (1)(2)
     % Proved developed            67.9%    76.8%     86.7%      85.68%

   Estimated future net revenue
     before income taxes (in                        
     thousands)                 $153,476 $164,058  $756,352 (3) $836,810 (2)(3)
   PV-10 (in thousands)           78,868   89,992   415,908 (3)  462,574 (2)(3)
     % Proved developed            76.7%    78.4%     87.5%        86.9%
<TABLE>
<CAPTION>
                                                                                                Nine Months Ended
                                                                                               September 30, 1997
                                                                                       ------------------------------------
                                                                                             Historical        Pro Forma
                                                                                           1996       1997        1997
                                                                                       ------------------------------------
<S>                                      <C>        <C>       <C>          <C>    <C>      <C>        <C>         <C>   <C>
Average Net Daily Production:
   Crude oil and NGLs (Bbls)             1,285      1,493     1,985        4,408  (4)      1,358      5,359       5,689 (5)
   Natural gas (Mcf)                     6,556      9,733    17,397       60,755  (4)      9,582     54,900      64,055 (5)

Average Sales Price:
   Crude oil (per Bbl)                 $ 15.47     $ 17.16   $ 20.85       $20.08 (4)     $ 19.94    $ 18.79    $ 18.69 (5)
   NGLs (per Bbl)                        10.54       10.83     14.55        12.04 (4)       12.73      10.63      10.63 (5)
   Natural gas (per Mcf)                  1.85        1.47      1.97         1.61 (4)        1.95       1.71       1.66 (5)

Natural Gas Processing Plants:
   Net plant capacity (MMcfpd)
     (period-end)                          25          25       128        128                25       130        130
</TABLE>
- -------------------

(1)  Reflects the sale by Vessels of the DJ Basin  Properties  and the Merger as
     if they occurred on December 31, 1996.
(2)  Includes  only that portion of Vessels  Proved  Undeveloped  reserves as of
     December 31, 1996 related to the 25%  Projected  Provisional  Payment to be
     issued at the Effective Time.
(3)  Does not include the present value of future net cash flow from  processing
     natural gas of third  parties at the  Canadian  Abraxas  Plants (as defined
     herein).
(4)  Reflects the acquisitions of the Wyoming Properties, CGGS, Portilla, Happy,
     the 50%  overriding  royalty  interest  in the East White Point and Stedman
     Island,  the sale by Vessels of the DJ Basin Properties and the Merger,  as
     if they occurred on January 1, 1996.
(5)  Reflects the sale by Vessels of the DJ Basin  Properties  and the Merger as
     if they occurred at January 1, 1997.

                                       20
<PAGE>


                    Selected Per Share Financial Information

         The following table sets forth selected  historical per share financial
information  for each of Abraxas and Vessels and  unaudited  pro forma per share
financial information for Abraxas giving effect to the Merger, as if it had been
consummated as of September 30, 1997, in the case of book value information, and
January 1, 1996 in the case of earnings  information.  The information presented
below is derived from (i) the consolidated  historical  financial  statements of
Abraxas and Vessels, including the related notes thereto, contained elsewhere in
this  Proxy  Statement-Prospectus  and (ii) the  Unaudited  Pro Forma  Financial
Information,  including  the notes  thereto,  contained  elsewhere in this Proxy
Statement-Prospectus,   and  should  be  read  in  conjunction  therewith.   See
"Unaudited Pro Forma Financial Information," "Selected Historical Financial Data
of Vessels," "Selected  Historical  Financial Data of Abraxas," the Consolidated
Financial  Statements of the Company and the notes thereto and the  Consolidated
Financial  Statements of Vessels and the notes thereto.  The pro forma per share
information  set forth herein assumes the initial  issuance of 562,070 shares of
Abraxas Common Stock in connection with the Merger (computed based on an assumed
determination  price of $18.00,  an assumed  exchange  ratio of 16.47  shares of
Abraxas  Common  Stock for each share of Vessels  Common Stock and is net of the
472,222  shares of Abraxas Common Stock issued to the Vessels  stockholders  and
deposited pursuant to the Escrow Agreement and the 767,657 shares deposited into
the Provisional  Payment Escrow).  The pro forma  information set forth below is
not necessarily indicative of what Abraxas' actual financial position or results
of operations  would have been had the Merger been  consummated  as of the above
referenced dates or of the financial  position or results of operations that may
be reported by Abraxas in the future.

                                            Year Ended        Nine Months Ended
                                         December 31, 1996   September 30, 1997
                                         -----------------   ------------------
Abraxas - Historical:
Earnings (loss) per common share from
 continuing operations                         $0.23               $(0.47)
Book value per common share (2)                 6.22                 5.12
Dividends per common share (1)                   --                    --

Abraxas - Pro Forma:
Earnings  (loss) per common share from
  continuing  operations (3)                  $(0.35)              $(0.29)
Book value per common share (4)                 7.27                 6.18
Dividends per common share (1)                   --                    --

Vessels - Historical:
Earnings (loss) per common share from 
 continuing operations                       $(63.54)             $(97.70)
Book value per common share (2)             1,116.09             1,025.11
Dividends per common share (1)                   --                    --

Vessels - Pro Forma Equivalents: (5)
Earnings (loss) per common share from
 continuing operations                        $(5.76)              $(4.78)
Book value per common share                   119.79               101.78
Dividends per common share                       --                    --

(1)  Abraxas'  ability  to pay  dividends  on it's  Common  Stock is  restricted
     pursuant to the terms of the Indenture  (as defined  herein) and the Credit
     Facility (as defined herein).
(2)  Historical  book value per share of Abraxas  and  Vessels  is  computed  by
     dividing  each  entities  stockholders'  equity at  December  31,  1996 and
     September 30, 1997 by the number of common shares outstanding at the end of
     the  respective  periods  excluding any shares held in the treasury and the
     dilutive effect of options, warrants and convertible preferred stock.
(3)  Pro forma  earnings  per share from  continuing  operations  is computed by
     dividing  income  from  continuing  operations,  less any  preferred  stock
     dividends,  by the historical  weighted average shares  outstanding for the
     respective  periods plus the 562,070 shares of Abraxas Common Stock assumed
     to be  initially  issued in the Merger.  If the  472,222  shares of Abraxas
     Common  Stock  deposited  under the Escrow  Agreement  to secure the Supply
     Contract and certain other  liabilities  had been issued the pro forma loss
     per share would be $(0.33) and  $(0.27) for the periods  December  31, 1996

                                       21
<PAGE>

     and September  30, 1997,  respectively.  The shares  issuable in the future
     pursuant to the  Projected  Provisional  Payment are not  considered  to be
     outstanding in this computation.
(4)  Pro forma book value per share of Abraxas is computed by dividing pro forma
     stockholders  equity at September  30, 1997 by the number of common  shares
     outstanding  at the end of the period plus 562,070 shares of Abraxas Common
     Stock assumed to be initially  issued in the Merger.  If the 472,222 shares
     of Abraxas Common Stock  escrowed under the Escrow  Agreement to secure the
     Supply Contract and certain other liabilities had been issued the pro forma
     book value per share would be $8.01 and $6.95 as of  December  31, 1996 and
     September 30, 1997, respectively.
(5)  Pro forma equivalent data of Vessels is computed by multiplying the Abraxas
     pro forma data by the  exchange  ratio of 16.47.  If the 472,222  shares of
     Abraxas  Common  Stock  escrowed  under the Escrow  Agreement to secure the
     Supply  Contract and certain  other  liabilities  had been issued,  the pro
     forma   equivalent   earnings  (loss)  per  common  share  from  continuing
     operations would have been $(10.61) and $(8.79) for the year ended December
     31, 1996 and the nine months ended  September 30, 1997,  respectively,  and
     the book value per common  share  would have been  $242.57  and  $187.25 at
     December 31, 1996 and September 30, 1997, respectively.


                                       22
<PAGE>



                                  RISK FACTORS

         Prior to voting on the proposal described herein,  Abraxas stockholders
should carefully consider the risk factors discussed below as well as all of the
information  contained elsewhere in this Proxy  Statement-Prospectus,  including
the Annexes hereto. See also "Note Regarding  Forward-Looking  Information." Any
or all of the risk factors  discussed below could have a material adverse effect
on the business,  financial condition,  results of operations,  and prospects of
Abraxas and its  subsidiaries,  including,  from and after the  Effective  Time,
Vessels, and/or on the price at which shares of Abraxas Common Stock may trade.

Merger Considerations

         In  determining  whether to approve  the  transactions  pursuant to the
Merger  Agreement,  stockholders  should  consider that the price of the Abraxas
Common Stock at the  Effective  Time,  as well as the prices at the date of this
Proxy Statement-Prospectus and at the date of the Special Meeting, may vary as a
result of changes in the business,  operations  or prospects of Abraxas,  market
assessments of the likelihood that the Merger will be consummated and the timing
thereof,  general market and economic conditions and other factors.  Because the
Effective  Time may occur at a later date than the date of the Special  Meeting,
there can be no assurance  that the trading price of Abraxas Common Stock on the
date of the Special  Meeting will be  indicative  of the price at which  Abraxas
Common Stock trades at or after the Effective Time. Vessels  stockholders should
also  consider  that the rights of holders of  Abraxas  Common  Stock  differ in
certain  respects  from the  rights of  holders of  Vessels  Common  Stock.  See
"Comparison  of  Rights of  Stockholders  of the  Company  and  Stockholders  of
Vessels" and "Certain  Differences  Between Nevada and Delaware Corporate Laws."
The  Effective  Time will occur as soon as  practicable  following  the  Special
Meeting and the  satisfaction or waiver of the other conditions set forth in the
Merger  Agreement.  See "The Merger -- The Merger Agreement -- Conditions to the
Merger."

Integration of Operations; Foreign Operations

         The Company's future operations and earnings will depend, in part, upon
the Company's  ability to integrate  the  operations of Vessels into the current
operations  of the Company.  There can be no assurance  that the Company will be
able to successfully  integrate such operations with those of the Company, and a
failure to do so would have a material adverse effect on the Company's financial
position,  results of  operations  and cash flows.  Additionally,  although  the
Company does not  currently  have any specific  acquisition  plans other than to
consummate the Merger, the need to focus  management's  attention on integration
of the new operations, as well as other factors, may limit the Company's ability
to  successfully  pursue  acquisitions  or other  opportunities  related  to its
business for the foreseeable future. Also, successful  integration of operations
will be subject to numerous contingencies, some of which are beyond management's
control.  These contingencies  include general and regional economic conditions,
prices  for  crude  oil and  natural  gas,  uncertainty  of  reserve  estimates,
competition,  drilling and  operating  risks,  operating  hazards and changes in
regulations.  Among other risks, the Company's operations will be subject to the
risks of restrictions on transfers of funds, export duties and quotas,  domestic
and international  customs and tariffs, and changing taxation policies,  foreign
exchange  restrictions,  political conditions and governmental  regulations.  In
addition,  the Company receives a substantial portion of its revenue in Canadian
dollars. As a result,  fluctuations in the exchange rates of the Canadian dollar
with  respect to the U.S.  dollar  could have a material  adverse  effect on the
Company's financial position,  results of operations and cash flows. The Company
may from  time to time  engage  in  hedging  programs  intended  to  reduce  the
Company's exposure to currency fluctuations.

High Degree of Leverage

         The Company's total debt and  stockholders'  equity were  approximately
$217.5  million and $32.1  million,  respectively,  at September  30, 1997.  See
"Capitalization."  In addition,  the Company has borrowing capacity of up to $40
million  under the Credit  Facility.  The  Company  intends to incur  additional
indebtedness  in  the  future  in  connection  with  acquiring,  developing  and
exploiting  producing  properties,  although  the  Company's  ability  to  incur
additional  indebtedness  may be limited by the terms of the  Indenture  and the
Credit Facility. See "Abraxas Management's  Discussion and Analysis of Financial
Condition and Results of Operations - Liquidity and Capital  Resources"  and the

                                       23
<PAGE>

Company's  Consolidated  Financial  Statements  and the  notes  thereto  and the
Unaudited  Pro  Forma  Financial  Information  and the  notes  thereto  included
elsewhere in this Proxy Statement-Prospectus.

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

         The  Company's  ability  to meet its debt  service  obligations  and to
reduce  its total  indebtedness  will be  dependent  upon the  Company's  future
performance,  which  will be  subject  to  general  economic  conditions  and to
financial,  business and other factors  affecting the operations of the Company,
many of which are beyond its control. Based upon the current level of operations
and the  historical  production of the producing  properties  and related assets
currently  owned by the Company,  the Company  believes  that its cash flow from
operations  as well as  borrowing  capabilities  will be  adequate  to meet  its
anticipated  requirements for working capital,  capital  expenditures,  interest
payments,  scheduled  principal payments and general corporate or other purposes
for the foreseeable  future.  See the Unaudited Pro Forma Financial  Information
and the notes thereto included elsewhere in this Proxy Statement-Prospectus, the
Company's  Consolidated  Financial  Statements  and the notes  thereto  included
elsewhere  in  this  Proxy   Statement-Prospectus   and  "Abraxas   Management's
Discussion  and  Analysis  of  Financial  Condition  and  Results of  Operations
Liquidity and Capital Resources." No assurance can be given,  however,  that the
Company's  business will  continue to generate  cash flow from  operations at or
above  current  levels  or  that  the  historical  production  of the  producing
properties and related assets currently owned by the Company can be sustained in
the future.  If the Company is unable to generate  cash flow from  operations in
the future to service its debt, it may be required to refinance all or a portion
of  its  existing  debt  or to  obtain  additional  financing.  There  can be no
assurance  that  such  refinancing  would be  possible  or that  any  additional
financing could be obtained.  In addition,  the Company's 11.5% Senior Notes due
2004 (the  "Notes")  are  subject  to certain  limitations  on  redemption.  See
"Abraxas Management's Discussion and Analysis of Financial Condition and Results
of Operations - Liquidity and Capital Resources."

Net Losses

         The  Company  has  experienced  recurring  losses.  For the years ended
December 31, 1992,  1993, 1994 and 1995, and the nine months ended September 30,
1997,  the Company  recorded  net losses of $4.0  million,  $2.4  million,  $2.4
million, $1.2 million and $2.6 million,  respectively. See "Abraxas Management's
Discussion and Analysis of Financial  Condition and Results of  Operations"  and
the Company's  Consolidated  Financial Statements and the notes thereto included
elsewhere in this Proxy Statement-Prospectus.

Industry Conditions; Impact on Company's Profitability

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

                                       24
<PAGE>

factors were to change  dramatically,  the  financial  impact on the Company and
Vessels could be substantial.  The availability of markets and the volatility of
product  prices are  beyond the  control of the  Company  and  Vessels  and thus
represent a significant risk.

         In addition,  declines in crude oil and natural gas prices might, under
certain  circumstances,  require a write-down of the book value of the Company's
and Vessels' crude oil and natural gas properties.  If such declines were severe
enough,  they could result in the  occurrence  of an event of default  under the
Notes  or the  Credit  Facility  that  could  require  the  sale  of some of the
Company's  producing  properties under unfavorable  market conditions or require
the Company to seek additional  equity capital.  In addition,  the Indenture and
the Credit Facility  contain certain  restrictions on certain sales of assets by
the Company.  See  "Abraxas  Management's  Discussion  and Analysis of Financial
Condition  and Results of  Operations  - Liquidity  and Capital  Resources"  and
"Vessels Management's Discussion and Analysis of Financial Condition and Results
of Operations - Liquidity and Capital Resources."

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

Restrictions Imposed by Terms of the Company's Indebtedness

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

Substantial Capital Requirements

         The  Company  makes,  and will  continue to make,  substantial  capital
expenditures for the  acquisition,  exploitation,  development,  exploration and
production of crude oil and natural gas reserves.  Historically, the Company has
financed  these  expenditures  primarily  with cash flow from  operations,  bank
borrowings and the offering of its equity securities.  The Company believes that
it will have  sufficient  capital to finance planned  capital  expenditures.  If

                                       25
<PAGE>

revenue or the Company's borrowing base under the Credit Facility decreases as a
result of lower  crude oil and natural gas  prices,  operating  difficulties  or
declines in reserves,  the Company may have limited  ability to finance  planned
capital  expenditures  in the future.  There can be no assurance that additional
debt or equity  financing or cash  generated by operations  will be available to
meet these requirements.  See "Abraxas  Management's  Discussion and Analysis of
Financial   Condition  and  Results  of  Operations  --  Liquidity  and  Capital
Resources."

Future Availability of Natural Gas Supply

         To obtain  volumes of  committed  natural  gas  reserves  to supply the
Company's  natural  gas  processing  plants in  Canada  (the  "Canadian  Abraxas
Plants"),  the Company's  wholly-owned  subsidiary,  Canadian Abraxas  Petroleum
Limited  ("Canadian  Abraxas")  contracts  to process  natural gas with  various
producers.  Future natural gas supplies available for processing at the Canadian
Abraxas  Plants will be affected by a number of factors  that are not within the
Company's  control,  including  the  depletion  rate  of  natural  gas  reserves
currently connected to the Canadian Abraxas Plants and the extent of exploration
for,  production and  development of, and demand for natural gas in the areas in
which  Canadian  Abraxas  will  operate.  Long-term  contracts  will not protect
Canadian Abraxas from shut-ins or supply  curtailments by natural gas suppliers.
Although  Canadian Abraxas and its predecessors have been successful in the past
in contracting  for new natural gas supplies and in renewing  natural gas supply
contracts as they expired,  there is no assurance that Canadian  Abraxas will be
able to do so on a similar basis in the future.

Operating Hazards; Uninsured Risks

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

Competition

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

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

                                       26
<PAGE>

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

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

Reliance on Estimates of Proved Reserves and Future Net Revenue

         There are numerous  uncertainties  inherent in estimating quantities of
proved  reserves and in projecting  future rates of production and the timing of
development  expenditures,  including  many  factors  beyond the  control of the
Company   and   Vessels.    The   reserve   data    included   in   this   Proxy
Statement-Prospectus  represent only  estimates.  In addition,  the estimates of
future net revenue from proved  reserves and the present value thereof are based
upon certain assumptions about future production levels,  prices, and costs that
may not prove to be correct over time. In particular, estimates of crude oil and
natural gas  reserves,  future net revenue  from proved  reserves  and the PV-10
thereof  for the crude oil and natural gas  properties  described  in this Proxy
Statement-Prospectus  are  based on the  assumption  that  future  crude oil and
natural  gas  prices  remain  the same as crude oil and  natural  gas  prices at
December 31, 1996.  The average  sales prices as of such dates used for purposes
of such estimates of Abraxas were $23.19 per Bbl of crude oil, $16.31 per Bbl of
NGLs and $2.96 per Mcf of natural  gas and the  average  sales  prices  used for
purposes of such  estimate of Vessels were $24.80 per Bbl of crude oil and $3.32
per Mcf of natural gas. Also assumed is the Company's and Vessels' making future
capital expenditures of approximately $35.1 million in the aggregate,  necessary
to  develop  and  realize  the value of  proved  undeveloped  reserves  on these
properties.  Any  significant  variance in these  assumptions  could  materially
affect the  estimated  quantity  and value of  reserves  set forth  herein.  See
"Abraxas Management's Discussion and Analysis of Financial Condition and Results
of Operations -- Liquidity  and Capital  Resources"  and "Business of Abraxas --
Reserves  Information"  and  "Vessels  Management's  Discussion  and Analysis of
Financial   Condition  and  Results  of  Operations  --  Liquidity  and  Capital
Resources" and "Business of Vessels-- Reserves Information."

Certain Business Risks

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

         In addition,  a high degree of risk of loss of invested  capital exists
in almost all  exploration  and  development  activities  which the  Company and
Vessels undertake.  No assurance can be given that crude oil or natural gas will
be discovered to replace reserves currently being developed,  produced and sold,

                                       27
<PAGE>

or that if crude  oil or  natural  gas  reserves  are  found,  they will be of a
sufficient  quantity to enable the Company or Vessels to recover the substantial
sums of money incurred in their acquisition, discovery and development. Drilling
activities  are  subject  to  numerous   risks,   including  the  risk  that  no
commercially productive crude oil or natural gas reservoirs will be encountered.
Such  activities  will  likewise  impact the  Provisional  Payment.  The cost of
drilling,  completing and operating wells is often  uncertain.  The Company's or
Vessels'  operations  may be  curtailed,  delayed  or  canceled  as a result  of
numerous factors including title problems,  weather conditions,  compliance with
governmental  requirements and shortages or delays in the delivery of equipment.
The  availability  of a ready market for the  Company's or Vessels'  natural gas
production depends on a number of factors,  including,  without limitation,  the
demand for and supply of natural gas,  the  proximity of natural gas reserves to
pipelines, the capacity of such pipelines and government regulations.

Depletion of Reserves

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

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

Government Regulation

         The Company's and Vessels'  businesses are subject to certain  federal,
state, provincial and local laws and regulations relating to the exploration for
and development,  production and marketing of crude oil and natural gas, as well
as  environmental  and safety matters.  Such laws and regulations have generally
become more  stringent in recent years,  often imposing  greater  liability on a
larger  number of  potentially  responsible  parties.  Because the  requirements
imposed by such laws and regulations are frequently changed, neither the Company
nor  Vessels  is able to  predict  the  ultimate  cost of  compliance  with such
requirements. There can be no assurance that laws and regulations enacted in the
future will not adversely affect the Company's or Vessels'  financial  condition
and results of operations.  See "Business of Abraxas -- Regulatory  Matters" and
"Business of Vessels -- Regulatory Matters."

Dependence on Key Personnel

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

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

         At December  31,  1996,  the Company  had,  subject to the  limitations
discussed below,  $20.1 million of net operating loss carryforwards for U.S. tax
purposes,  of which  approximately  $17.5 million are available for  utilization
without limitation.  These loss carryforwards will expire from 2002 through 2010
if not utilized. At December 31, 1996, the Company had approximately $830,000 of
net operating loss carryforwards for Canadian tax purposes which expire in 2003.
As a result of the  acquisition of certain  partnership  interests and crude oil

                                       28
<PAGE>

and natural gas  properties in 1990 and 1991, an ownership  change under Section
382  ("Section  382") of the  Internal  Revenue  Code of 1986,  as amended  (the
"Code"), occurred with respect to the Company in December 1991. Accordingly,  it
is expected that the use of net operating loss carryforwards  generated prior to
December 31, 1991 of $4.9 million will be limited to approximately  $235,000 per
year.  As a result of the  issuance  of  additional  shares of Common  Stock for
acquisitions  and sales of stock, an additional  ownership  change under Section
382 occurred in October  1993.  Accordingly,  it is expected that the use of all
U.S. net operating loss  carryforwards  generated through 1993, or $8.2 million,
will be limited to approximately $1 million per year subject to the lower limits
described  above.  Of the $8.2 million net operating loss  carryforwards,  it is
anticipated  that the maximum net operation loss that may be utilized  before it
expires is $5.7 million.  Further changes in ownership,  including  changes as a
result of the Merger, may further limit the use of the Company's  carryforwards.
In addition to the Section 382 limitations, uncertainties exist as to the future
utilization  of the operating  loss  carryforwards  under the criteria set forth
under FASB Statement No. 109. Therefore, the Company has established a valuation
allowance  of $5.7  million and $5.7 million for deferred tax assets at December
31, 1996 and 1995 respectively.


                                       29
<PAGE>


                               THE SPECIAL MEETING

General

         This Proxy  Statement-Prospectus  is being  furnished by Abraxas to its
stockholders in connection with the solicitation of proxies, by and on behalf of
the Abraxas Board, for use at the Special  Meeting.  The Special Meeting will be
held on Friday,  February  13,  1998 at 9:00 a.m.,  Central  Time,  at  Abraxas'
offices,  500 North Loop 1604 East,  Suite 100,  San Antonio,  Texas 78232.  The
purpose of the Special Meeting is for Abraxas  stockholders to consider and vote
upon a proposal to approve the Merger and the Share Issuance.

         THE ABRAXAS BOARD  BELIEVES THAT THE MERGER AND THE SHARE  ISSUANCE ARE
IN THE BEST INTERESTS OF ABRAXAS AND ITS STOCKHOLDERS AND UNANIMOUSLY RECOMMENDS
THAT STOCKHOLDERS VOTE "FOR" THE APPROVAL OF THE MERGER AND THE SHARE ISSUANCE.

Voting at the Special Meeting

         The holders of record of shares of Abraxas Common Stock as of the close
of business on January 6, 1998,  the Record Date,  are entitled to notice of and
to vote at the Special  Meeting.  As of the Record  Date,  there were  6,422,540
shares of Abraxas Common Stock outstanding,  and there were approximately  1,874
holders of record of Abraxas  Common Stock.  Each  outstanding  share of Abraxas
Common Stock is entitled to one vote at the Special  Meeting.  Shares of Abraxas
Common Stock held in the treasury of Abraxas or by any of its  subsidiaries  are
not considered to be outstanding.

         The holders of shares  representing a majority of the shares of Abraxas
Common Stock  outstanding as of the Record Date will constitute a quorum for the
transaction  of  business  at the Special  Meeting.  If the  persons  present or
represented  by  proxy at the  Special  Meeting  constitute  holders  of  shares
representing  less  than a  majority  of the  shares  of  Abraxas  Common  Stock
outstanding  as of the Record  Date,  the Special  Meeting may be adjourned to a
subsequent date for the purpose of obtaining a quorum.

         Pursuant to the Merger  Agreement,  the  consummation  of the Merger is
conditioned  upon, among other things,  the approval of the Merger and the Share
Issuance by the  affirmative  vote of the holders of a majority of the shares of
Abraxas  Common  Stock  present at the  Special  Meeting  and  entitled  to vote
thereon.  Abstentions  (i.e.,  properly  executed proxies marked  "ABSTAIN") and
shares represented by broker non-votes (i.e., shares held by brokers or nominees
which are  represented  at a meeting  but with  respect  to which the  broker or
nominee  is not  empowered  to vote on this  proposal  for the  Merger)  will be
included  in  determining  the  number  of shares  held by  persons  present  or
represented by proxy at the Special Meeting for purposes of determining  whether
a quorum exists.  Consequently,  an abstention or a broker non-vote has the same
effect as a vote  against the  proposal as each  abstention  or broker  non-vote
would be one less vote in favor of the proposal.

         As of the Record Date,  directors and executive officers of Abraxas and
their affiliates owned beneficially,  in the aggregate,  approximately 10.07% of
the outstanding shares of Abraxas Common Stock. Abraxas' directors and executive
officers  have agreed to vote their  shares of Abraxas  Common Stock in favor of
the Merger and the Share  Issuance.  See "The  Merger-Board  Representation  and
Voting Agreement."

Proxies; Revocation

         All shares of Abraxas Common Stock  represented at the Special  Meeting
by properly executed proxies received prior to or at the Special Meeting, unless
such proxies  shall have been revoked,  will be voted at the Special  Meeting in
accordance  with  the  instructions  on  the  proxies.  If no  instructions  are
indicated,  such  proxies  will be voted for the  approval of the Merger and the
Share Issuance.


                                       30
<PAGE>


         A proxy  given  pursuant  to this  solicitation  may be  revoked by the
person giving it at any time before the proxy is voted at the Special Meeting. A
proxy may be revoked by filing with the Secretary of Abraxas prior to the voting
of the proxy either a written instrument revoking the proxy or an executed proxy
bearing a later date, or by voting in person at the Special Meeting.  Attendance
at the Special  Meeting  will not, in itself,  constitute  the  revocation  of a
proxy.

         Abraxas  will  bear  the  cost  of  the   preparation   of  this  Proxy
Statement-Prospectus  and the  solicitation of proxies for voting at the Special
Meeting.


                                       31
<PAGE>


                                   THE MERGER

Background of the Merger

         Vessels,  in 1996,  coincident  with the pending  divestiture of the DJ
Basin Properties,  began to review strategic  alternatives that would expose its
stockholders to growth potential in the hydrocarbon extraction sector. To assist
in reviewing  strategic  alternatives,  Vessels engaged Weisser Johnson in April
1997. After an extensive review of Vessels and industry  opportunities,  Vessels
determined that a stock for stock, tax-free exchange would be the most practical
manner to enhance stockholder value.

         Since  January 1,  1991,  Abraxas'  principal  means of growth has been
through the acquisition and subsequent development and exploitation of producing
properties  and  related  assets.  Abraxas  utilizes a  disciplined  acquisition
strategy  focusing  its  efforts on  producing  properties  and  related  assets
possessing  the  following  characteristics:   a  concentration  of  operations;
significant,  quantifiable  development  potential;  historically  low operating
expenses; and the potential to reduce G&A expenses per BOE.

         Between April 1997 and May 1997, Weisser Johnson worked with Vessels to
pursue a stock merger and contacted several potential merger candidates.  One of
these  candidates  was Abraxas,  which  learned of Vessels'  interest in a stock
merger through discussions with Weisser Johnson in April 1997.

         On May 30, 1997, Robert L. G. Watson, President of Abraxas, met with W.
M.  Neumann,  President  and CEO of  Vessels,  and Scott  Johnson,  a partner of
Weisser  Johnson,  to discuss the nature of Abraxas' and  Vessels'  business and
explore the strategic value of a merger.

         Shortly  thereafter,  Mr. Watson  advised Mr. Johnson that based on the
earlier  discussions,  Abraxas would  appreciate  further and more in-depth data
about Vessels and expressed a willingness  to convey similar  information  about
Abraxas.

         After  execution of a  confidentiality  agreement,  representatives  of
Vessels and Abraxas met in San Antonio on June 18, 1997 for the further exchange
of information.

         Following  the meeting on June 18, 1997,  Frank  Weisser,  a partner in
Weisser  Johnson,  advised  Mr.  Watson  of  Vessels'  interests  in  furthering
conversations  regarding  a  merger.  As a  result,  on  July 3,  1997,  Abraxas
forwarded a proposal for a transaction  structure.  After further  discussion of
the  transaction  structure,  Abraxas  forwarded  a  proposed  letter  of intent
regarding  a merger  and after  further  negotiation,  on August 19,  1997,  the
parties  entered into a letter of intent  providing  for the  conducting  of due
diligence and negotiation of a definitive merger agreement.

         Abraxas'  review of  Vessels'  business  indicated  that  ownership  of
Vessels'  properties would be consistent with Abraxas'  disciplined  acquisition
strategy.

         Vessels'  review of Abraxas'  business and of the proposed merger steps
indicated that Vessels' objectives of diversifying  project risk while retaining
some  exposure  to  its  properties'   growth  potential  would  be  efficiently
accomplished through the merger.

         On November 12, 1997, the Merger Agreement was executed by the parties.

Abraxas' Reasons for the Merger

         The Abraxas Board has determined that the Merger and the Share Issuance
are in the best  interests  of Abraxas and its  stockholders.  ACCORDINGLY,  THE
ABRAXAS  BOARD HAS  UNANIMOUSLY  APPROVED THE MERGER AND THE SHARE  ISSUANCE AND
RECOMMENDS THAT THE ABRAXAS  STOCKHOLDERS  VOTE "FOR" THE APPROVAL OF THE MERGER
AND THE SHARE ISSUANCE.

                                       32
<PAGE>

         Since  January 1,  1991,  Abraxas'  principal  means of growth has been
through the acquisition and subsequent development and exploitation of producing
properties  and  related  assets.  Abraxas  utilizes a  disciplined  acquisition
strategy  focusing  its  efforts on  producing  properties  and  related  assets
possessing  the  following  characteristics:   a  concentration  of  operations;
significant,  quantifiable  development  potential;  historically  low operating
expenses; and the potential to reduce G&A expenses per BOE.

         The Merger with Vessels satisfies the Company's  acquisition  criteria.
The Vessels' operating assets are geographically concentrated in close proximity
to existing Abraxas oil and gas properties.  Abraxas'  management  believes that
efficiencies  in  operations  to be  gained  due to  this  concentration  should
translate to lower field operating  costs.  The Vessels assets include  numerous
development and exploratory prospects that, Abraxas management believes, possess
significant  upside  potential.  The historical field operating costs of Vessels
assets  compare  favorably to the existing  Abraxas cost  structure in the area.
Abraxas   expects  that  the   elimination   of  virtually  the  entire  Vessels
administrative  staff,  with those functions being absorbed by existing  Abraxas
staff,  will result in Abraxas' G&A expense,  on a per BOE basis,  being reduced
following the Merger.

         In reaching its recommendation with respect to the Merger and the Share
Issuance,  the Abraxas Board considered a number of factors  including,  without
limitation,  the reasons for the Merger described above. In view of the numerous
factors  taken  into  consideration,  the  Abraxas  Board  did not  consider  it
practical  to, and did not attempt to,  quantify or  otherwise  assign  relative
weights to the factors considered by it in reaching its decision.

The Merger Agreement

         The  following  is a  summary  of the  material  terms  of  the  Merger
Agreement.  This  summary  is  not a  complete  description  of  the  terms  and
conditions of the Merger Agreement and is qualified in its entirety by reference
to the full text of the Merger  Agreement and Section 262 of the DGCL, which are
incorporated  by reference and copies of which are attached as Annexes I and II,
respectively,   to  this  Proxy  Statement-Prospectus.   Capitalized  terms  not
otherwise defined herein or in the following summary shall have the meanings set
forth in the Merger Agreement.

         The Merger.  On the terms and subject to the  conditions  of the Merger
Agreement,  at the  Effective  Time Sub will be merged with and into  Vessels in
accordance  with the  applicable  provisions  of the DGCL with Vessels being the
surviving corporation and a subsidiary of Abraxas.

         As soon as  practicable  following  the date on  which  the last of the
conditions  set forth in the Merger  Agreement is  satisfied or waived,  Sub and
Vessels  will cause a  certificate  of merger to be filed with the  Secretary of
State of the State of Delaware as provided in the DGCL.  Upon completion of such
filing, the Merger will become effective in accordance with the DGCL.

         Conversion of Vessels Shares. At the Effective Time of the Merger, each
then  outstanding  share of Vessels  Common  Stock  (other  than  shares held by
stockholders of Vessels,  if any, who properly  exercised their appraisal rights
under  Delaware law) will be converted  into the right to receive  approximately
22.8 shares of Abraxas  Common  Stock plus a number of shares of Abraxas  Common
Stock  equal to a fraction,  the  numerator  of which is  Vessels'  Non-PDP/PDNP
EBITDX,  which is equal to  $4,364,415,  times .80 times  5.33  minus the amount
payable by Vessels to Weisser  Johnson on April 30, 1999, and the denominator of
which is $18.00 (the "Projected Provisional Payment"). The Projected Provisional
Payment  entitles the Vessels  stockholders  to an  aggregate  of  approximately
1,023,543  shares of  Abraxas  Common  Stock or  approximately  29.98  shares of
Abraxas  Common Stock for each share of Vessels  Common Stock.  Of the shares of
Abraxas Common Stock issued pursuant to the Projected  Provisional Payment, 25%,
or an  aggregate of  approximately  255,886  shares of Abraxas  Common Stock (or
approximately  7.5  shares of  Abraxas  Common  Stock for each  share of Vessels
Common  Stock),  will be issued at the Effective  Time and the remainder will be
issued and deposited into the  Provisional  Payment  Escrow.  On the Provisional
Payment Date, Abraxas will release that number of shares of Abraxas Common Stock
from the  Provisional  Payment  Escrow as are  necessary to pay the  Provisional
Payment in full. In the event that the  Provisional  Payment is greater than the
Projected Provisional Payment,  Abraxas will release all of the shares deposited
into the  Provisional  Payment  Escrow  and will  issue  any  additional  shares
necessary to make the  Provisional  Payment.  In the event that the  Provisional

                                       33
<PAGE>

Payment is less than the Projected Provisional Payment, an appropriate number of
shares of Abraxas Common Stock will be released to the Vessels stockholders from
the  Provisional  Payment  Escrow with the remainder  being returned to Abraxas.
Pursuant to the terms of the Merger Agreement,  if the amount of the Provisional
Payment is the same as the amount of the Projected Provisional Payment,  Abraxas
is required to issue a total of approximately 1,801,949 shares of Abraxas Common
Stock in the Merger.  Abraxas is seeking the  approval  of its  stockholders  to
issue a total of 1,900,000 shares of Abraxas Common Stock in the Merger in order
to  cover  any  additional  shares  Abraxas  would be  required  to issue if the
Provisional Payment is greater than the Projected Provisional Payment as well as
to  reserve  a total of 12,190  shares  of  Abraxas  Common  Stock for  issuance
pursuant to the exercise of certain  warrants to purchase  Vessels  Common Stock
which, upon consummation of the Merger, will become warrants to purchase Abraxas
Common Stock. See "Description of Abraxas Common Stock - Warrants."

         For example, pursuant to the terms of the Merger Agreement,  Abraxas is
required to issue to the Vessels stockholders a total of approximately 1,023,543
shares of Abraxas  Common Stock in  consideration  of the Projected  Provisional
Payment,  of which a total of  approximately  255,886  will be  delivered at the
Effective  Time  directly  to the  Vessels  stockholders  and  767,657  will  be
deposited  into the  Provisional  Payment  Escrow.  If the  Provisional  Payment
entitled the Vessels stockholders to an aggregate of 1,000,000 shares of Abraxas
Common Stock,  744,114  shares of Abraxas  Common Stock which had been deposited
into  the   Provisional   Payment  Escrow  would  be  released  to  the  Vessels
stockholders and 23,543 shares would be returned to Abraxas.

         Under the Merger  Agreement,  the  Projected  Provisional  Payment  was
determined based upon the average of the EBITDX estimated in the reserve reports
prepared by Vessels' independent  petroleum  engineers,  NSA, and an engineering
firm   jointly   engaged  by  Abraxas  and  Vessels  with  respect  to  Vessels'
Non-PDP/PDNP  Properties.  The Provisional Payment will be based upon the actual
EBITDX from  Vessels'  Non-PDP/PDNP  Properties  for the period from February 1,
1998 to January 31, 1999.  Under the Development  Plan,  Abraxas is obligated to
drill and, if commercially feasible, complete and initiate production from wells
on Vessels' Non-PDP/PDNP Properties in accordance with a specified schedule from
which Vessels' Non-PDP/PDNP EBITDX will be determined.

         Appraisal  Rights. In the event that the Merger is effected and Vessels
stockholders  are  entitled to receive the  applicable  consideration  described
above,  shares of Vessels Common Stock issued and outstanding  immediately prior
to the Effective Time held by a holder (if any) who has the right to demand, and
who has properly demanded an appraisal of such shares of Vessels Common Stock in
accordance with Section 262 of the DGCL (or any successor provision) ("Appraisal
Shares")  will  not be  converted  into  the  right to  receive  the  applicable
consideration,  unless  such  holder  fails to perfect or  otherwise  loses such
holder's right to such  appraisal,  if any. If, after the Effective  Time,  such
holder  fails to perfect or loses any such right to  appraisal,  each  Appraisal
Share of such holders  shall be treated as a share of Vessels  Common Stock that
has been  converted  as of the  Effective  Time  into the right to  receive  the
applicable consideration,  in accordance with the terms of the Merger Agreement.
The  holders  of Abraxas  Common  Stock  will not have any  appraisal  rights in
connection with the Merger or the Share Issuance. See Annex II.

         Fractional Shares. No fractional shares of Abraxas Common Stock will be
issued pursuant to the Merger.  In lieu of any such fractional  shares,  Abraxas
will  issue to each  holder of  Vessels  Common  Stock who  would  otherwise  be
entitled  to receive a fraction of a share of Abraxas  Common  Stock equal to or
exceeding .50 of Abraxas Common Stock promptly after the Effective Time, one (1)
share of Abraxas Common Stock. Fractional shares equal to less than .50 will not
be converted into any shares of Abraxas Common Stock.

         Conduct of Business of Abraxas, Sub and Vessels. Pursuant to the Merger
Agreement,  the Company,  Sub and Vessels  have agreed that,  subject to certain
limited  exceptions,  prior to the  Effective  Time,  each will (i)  conduct its
respective  operations according to their ordinary and usual courses of business
consistent with past practice;  and (ii) use its best efforts to preserve intact
its  business  organization,  keep  available  the  services of its officers and
employees as a group and maintain  satisfactory  relationships  with  licensors,
suppliers,   distributors,   lessees,   clients  and  others   having   business
relationships  with it. In addition,  each of Vessels,  Abraxas and Sub will (i)
cause its corporate charter and by-laws to be maintained in their form as of the
date of the Merger  Agreement;  (ii)  refrain  from  making any bonus,  pension,

                                       34
<PAGE>

retirement  or  insurance  payment or  arrangement  to or with any such  persons
except those that may already have been  accrued;  (iii)  refrain from  entering
into any contract or  commitment  except  contracts  in the  ordinary  course of
business;  (iv) refrain from making any change  affecting any bank, safe deposit
or power of attorney arrangements; and (v) refrain from declaring setting aside,
paying or distributing any dividends or distribution with respect to its capital
stock or engage in any similar  recapitalization.  Vessels, Abraxas and Sub have
agreed to confer on a regular and frequent basis to report material  operational
matters and the general status of ongoing operations.  Vessels,  Abraxas and Sub
are required to notify each other of any unexpected emergency or other change in
the normal  course of their  respective  businesses or in the operation of their
respective  properties and of any  governmental  complaints,  investigations  or
hearings, adjudicatory proceedings, budget meetings or submissions involving any
material  property  and to keep each other  fully  informed  of such  events and
permit each  other's  respective  representatives  prompt  access to all related
materials.

         Additional  Agreements.  In the Merger  Agreement,  Abraxas and Vessels
have  promised  that they each will (i) afford to one another  full and complete
access during normal business hours to its properties,  books and records;  (ii)
make  all  regulatory  filings  required  to be made as a result  of the  Merger
Agreement  and use all  reasonable  efforts to obtain all  necessary  regulatory
approvals; (iii) subject to the fiduciary duties of the directors of Abraxas and
Vessels,  use their best efforts to effectuate the transactions  contemplated by
the Merger  Agreement,  including  filings with and  approvals  of  governmental
agencies  and  consents  and  waivers  required  under any  material  contracts,
agreements, leases, licenses or other documents to which Abraxas or Vessels is a
party; (iv) hold in strict confidence,  unless compelled to disclose by judicial
or administrative  process, all non-public documents and information  concerning
the other  furnished to them in connection  with the Merger  Agreement;  and (v)
consult  with each  other  before  issuing  any press  release  or other  public
announcement  about the Merger,  and not issue any such  release or other public
announcement  about the Merger,  and not issue any such release or  announcement
without  the  consent  of the other  unless  required  by law or by  obligations
pursuant to any listing agreement with any national securities exchange. Each of
Vessels  and  Abraxas  has also  agreed to use its best  efforts to qualify  the
Merger as a tax-free  reorganization within the meaning of Section 368(a) of the
Code.  In addition,  Vessels has agreed that,  from  November 12, 1997 until the
Effective  Time,  Vessels will not take any action to  encourage,  initiate,  or
engage in discussions or  negotiations  with, or provide any information to, any
individual or entity (other than Abraxas) concerning any purchase of the Vessels
Common Stock, or any merger or sale of all or substantially all of the assets of
Vessels and its subsidiaries or similar transactions involving Vessels.

         Representations  and Warranties.  The Merger Agreement contains certain
customary representations and warranties of Vessels relating to organization and
qualification,    capitalization,    corporate   authority,   subsidiaries   and
investments,  financial statements, books and records, title to properties, real
property,  reserve  reports,  title to oil and gas  interests,  compliance  with
leases  and  applicable   laws,  sale  of  production,   status  of  wells,  tax
partnerships,  equipment, material contracts, restrictive documents, litigation,
taxes,  insurance,  intellectual  properties,  accounts  receivable,  employment
relations,  employee benefit plans, interests in clients,  suppliers, etc., bank
accounts and powers of attorney,  no changes prior to closing date,  broker's or
finder's  fees,   copies  of  documents,   environmental   protection  and  full
disclosure.

         The Merger Agreement also sets forth certain customary  representations
and warranties of Abraxas and Sub relating to organization and  qualification of
Abraxas,  Sub and Canadian Abraxas,  corporate  authority,  broker's or finder's
fees, capital stock, books and records,  litigation,  taxes,  reports filed with
the  Commission,  restrictive  documents,  title to properties,  reserve report,
title to oil and gas interests and full disclosure.

         Except for certain representations and warranties the survival of which
is provided for in the Escrow  Agreement,  the  representations  and  warranties
generally expire at Closing.

         Conditions  to the Merger.  The  obligations  of Abraxas and Vessels to
effectuate the Merger Agreement are subject to the satisfaction of the following
conditions:  (a) the  Merger  Agreement  shall  have been duly  approved  by the
Vessels  stockholders  and  the  Abraxas  stockholders;   (b)  the  Registration
Statement  on Form S-4 shall  have  become  effective  and  neither a stop order
suspending its effectiveness shall be in effect nor proceedings for such purpose
shall be pending or threatened before the Commission; (c) no governmental action
or  proceeding  shall have been  commenced  or  threatened  seeking to prohibit,
restrain,  invalidate or set aside the  effectuation  of the Merger;  and (d) no
court or governmental order, statute, rule,  regulation,  executive order, stay,

                                       35
<PAGE>

decree,  judgment or  injunction  shall have been  effected  which  prohibits or
restricts the effectuation of the Merger.  Vessels and Abraxas,  as the case may
be, may waive compliance of any of the foregoing conditions.

         The obligations of Vessels to consummate the Merger  Agreement are also
subject to the  satisfaction or waiver of the following  additional  conditions:
(a) the  representations  and  warranties  of  Abraxas  contained  in the Merger
Agreement  shall have been  materially true and correct on and as of the Closing
Date;  (b) Vessels shall have  received  certain  legal  opinions,  including an
opinion  that the Merger will be treated as a tax-free  transaction  for federal
income tax purposes,  and closing  certificates;  (c) Abraxas shall have entered
into the  Registration  Rights  Agreement,  the Letter  Agreement and the Escrow
Agreements;  (d) the receipt by Abraxas of any  necessary  waivers and  consents
under the Credit Agreement;  (e) the shares of Abraxas Common Stock to be issued
in the  Merger  shall have been  accepted  for  trading  on the Nasdaq  National
Market;  (f) there shall have been no material  adverse  change in the assets or
liabilities,  the business or condition,  financial or otherwise, the results of
operations,  or prospects of Abraxas on a consolidated basis that would or would
be reasonably likely to have a Material Adverse Effect (as defined in the Merger
Agreement)   other  than  a  change  that  affects  Abraxas  and  Vessels  in  a
substantially similar manner; (g) Abraxas shall have performed and complied with
the agreements and obligations contained in the Merger Agreement to be performed
and  complied  with by it prior to the  Effective  Time;  (h) the  directors  of
Abraxas  and Sub  shall  have  recommended  and voted in favor of  adoption  and
approval  of the  Merger  Agreement;  and (i)  Vessels  shall  have  received  a
favorable opinion of King & Spalding  concerning the qualification of the Merger
as a reorganization under Section 368(a) of the Code.

         The  obligations  of Abraxas are also  subject to the  satisfaction  or
waiver of the following additional conditions:  (a) Vessels shall have performed
and  complied  with the  agreements  and  obligations  contained  in the  Merger
Agreement  that are required to be performed and complied with by it at or prior
to the  Effective  Date;  (b) the  representations  and  warranties  of  Vessels
contained in the Merger Agreement shall have been materially true and correct on
and as of the  Closing;  (c) all  consents  of third  parties  shall  have  been
obtained or effected; (d) Abraxas shall have received certain legal opinions and
closing certificates;  (e) the Representative shall have entered into the Escrow
Agreements;  (e) Abraxas  shall have obtained from each person who may be deemed
to be an  "affiliate"  (as such term is defined under Rule 145 of the Securities
Act) of  Vessels,  a written  agreement  with  respect  to the shares of Abraxas
Common  Stock to be received  by such  person in the  Merger;  (f) the number of
Vessels  Appraisal  Shares  shall not exceed 5% of the shares of Vessels  Common
Stock  outstanding as of the date of the Merger  Agreement;  (g) all options and
certain  warrants to  purchase  shares of Vessels  Common  Stock shall have been
terminated;  (h) there shall have been no material  adverse change in the assets
or liabilities,  the business or condition,  financial or otherwise, the results
of  operations,  or prospects of Vessels on a  consolidated  basis that would or
would be reasonably likely to have a Material Adverse Effect other than a change
that affects  Abraxas and Vessels in a  substantially  similar  manner;  (i) all
indebtedness  of the  directors,  officers  and  employees  of  Vessels  and its
subsidiaries to Vessels and its subsidiaries shall have been repaid in full; (j)
the Vessels Oil and Gas Company  Amended  and  Restated  Stockholders  Agreement
shall have been  terminated;  and (k)  Vessels'  credit  agreement  with Bank of
Montreal  shall have been  terminated  with funds  provided  by Abraxas  and all
liens,  encumbrances and security  interests on the assets of Vessels shall have
been released.

         Termination.  The Merger  Agreement may be terminated  and abandoned at
any time  prior to the  Closing,  whether  before or after the  approval  of the
Merger  Agreement  by the  stockholders  of Abraxas,  by (i) the mutual  written
consent of the Boards of  Directors  of Abraxas and of Vessels;  (ii) Abraxas or
Vessels if the Effective  Time has not occurred on or before  February 28, 1998;
provided,  however,  that this right to terminate  shall not be available to any
party whose  failure to fulfill any  obligation,  covenant or condition  was the
cause of, or resulted  in, the failure of the Closing to occur on or before such
date;  (iii)  Abraxas or Vessels if any court of competent  jurisdiction  in the
United  States or other  United  States  governmental  body shall have issued an
order,  decree or ruling or taken any other  action  restraining,  enjoining  or
otherwise  prohibiting the Merger and such order, decree, ruling or other action
shall become final and nonappealable; (iv) Abraxas, Sub or Vessels if any of its
conditions to Closing could not be satisfied prior to February 28, 1998;  unless
the failure to satisfy such  condition  resulted from such  parties'  failure to
perform in any  material  respect a material  covenant or agreement or from such
party's breach of a material  representation  or warranty;  (v) Abraxas,  Sub or
Vessels if the  stockholders  of either  Abraxas or Vessels do not  approve  the
Merger;  or (vi)  Vessels if the  executive  officers  and  directors of Abraxas
breach the Voting Agreement.

                                       36
<PAGE>

         Effect of  Termination.  In the event of the  termination of the Merger
Agreement:  (i) each party will redeliver or destroy all documents,  work papers
or other materials of the other party relating to the transactions  contemplated
by the Merger Agreement,  whenever  obtained,  to the party furnishing the same;
and (ii) all  nonpublic  information  obtained by any party with  respect to the
business of the other party cannot be used for the advantage of, or disclosed to
third  parties  by, such party to the  detriment  of the party  furnishing  such
information.

         The Merger Agreement  obligates Vessels to pay to Abraxas a fee of $1.5
million if the Merger Agreement is terminated by Abraxas or Sub by reason of the
failure of any of Abraxas' and Sub's  conditions to Closing not being  satisfied
prior to  February  28,  1998;  provided,  however,  that  Vessels  shall not be
obligated to pay such fee if Abraxas and Sub terminate  the Merger  Agreement on
account of the  conditions  relating  to the  delivery  of the opinion of King &
Spalding  (but only to the extent the opinion  cannot  substantively  legally be
given),  the  effectiveness  of the S-4  Registration  Statement or  dissenters'
rights not having  been  satisfied  or if Abraxas and Sub  terminate  the Merger
Agreement on account of the failure to receive necessary  consents and approvals
for  which  Abraxas  has  responsibility,  approvals  typically  received  after
consummation of a transaction  similar to the Merger or approvals the failure of
which to be obtained would not have a Material Adverse Effect; provided, further
that Vessels shall not be obligated to pay such fee if (i) Abraxas and Sub shall
not  have  satisfied  all of  Vessels'  conditions  to  closing  other  than the
conditions to closing relating to the opinion of Cox & Smith  Incorporated  (but
only to the extent the opinion  cannot  substantively  legally be given) and the
approval  of the  stockholders  of Abraxas  of the  Merger,  (ii) the  executive
officers and directors of Abraxas  shall not have  satisfied  their  obligations
under the  Voting  Agreements  or (iii)  Abraxas  shall  have  taken any  action
intended or reasonably calculated to prevent the Closing.

         The Merger Agreement  obligates Abraxas to pay to Vessels a fee of $1.5
million  if the  Merger  Agreement  is  terminated  by  Vessels by reason of the
failure of any of Vessels'  conditions to Closing not being  satisfied  prior to
February 28, 1998; or if the  executive  officers and directors of Abraxas shall
have breached the Voting Agreements;  provided,  however, that Abraxas shall not
be  obligated  to pay such fee if Vessels  terminates  the Merger  Agreement  on
account of the conditions relating to the delivery of the opinion of Cox & Smith
Incorporated (but only to the extent the opinion cannot substantively legally be
given) or the receipt of Abraxas  stockholder  approval of the Merger not having
been  satisfied  or Vessels  terminates  the Merger  Agreement on account of the
failure to receive  necessary  consents  and  approvals  for which  Vessels  has
responsibility, approvals typically received after consummation of a transaction
similar to the Merger or approvals the failure of which to be obtained would not
have a Material  Adverse  Effect;  provided,  further that Abraxas  shall not be
obligated  to pay such  fee if (i)  Vessels  shall  not  have  satisfied  all of
Abraxas'  conditions to closing other than the conditions to closing relating to
the  opinion of King &  Spalding  (but only to the  extent  the  opinion  cannot
substantively  legally  be given),  the  effectiveness  of the S-4  Registration
Statement  or  dissenters'  rights or (ii)  Vessels  shall have taken any action
intended or reasonably calculated to prevent the Closing.

         Amendment  and  Modification.  The  Merger  Agreement  may,  subject to
applicable  law, be amended,  modified or  supplemented at any time prior to the
Closing only by written agreement of the parties to the Merger Agreement.

         Indemnification.  The Merger Agreement provides that the certificate of
incorporation and by-laws of Vessels will contain the provisions with respect to
indemnification  set forth in the Vessels  Certificate and the Vessels Bylaws on
the  date  of the  Merger  Agreement,  which  provisions  will  not be  amended,
repealed,  or otherwise  modified  after the  Effective  Time in any manner that
would  adversely  affect the rights  thereunder of  individuals  who at any time
prior to the Effective  Time were directors or officers of Vessels in respect of
actions or omissions  occurring  at or prior to the  Effective  Time  (including
without  limitation  the  transactions  contemplated  by the Merger  Agreement),
unless  such  modification  is  required by law.  The Merger  Agreement  further
provides that Vessels will, and from and after the Effective Time, Abraxas will,
or will cause Vessels to, indemnify,  defend,  and hold harmless each person who
is now, or has previously been at any time or who becomes prior to the Effective
Time, an officer or director of Vessels (the "Indemnified  Parties") against all
losses, claims,  damages,  costs, expenses (including reasonable attorneys' fees
and expenses), liabilities, or judgments or amounts that are paid in settlement,
with  the  approval  of the  indemnifying  party  (which  approval  is not to be

                                       37
<PAGE>

unreasonably withheld), of or in connection with any threatened or actual claim,
action,  suit,  proceeding,  or  investigation  based  in whole or in part on or
arising  in  whole  or in part  out of the fact  that  such  person  is or was a
director  or officer of Vessels  whether  pertaining  to any matter  existing or
occurring  at or prior to the  Effective  Time and  whether  asserted or claimed
prior  to, or at or  after,  the  Effective  Time  ("Indemnified  Liabilities"),
including all Indemnified  Liabilities  based in whole or in part on, or arising
in  whole  or in part out of,  or  pertaining  to the  Merger  Agreement  or the
transactions   contemplated  thereby,  in  each  case,  to  the  full  extent  a
corporation  is  permitted  under the DGCL to  indemnify  its own  directors  or
officers as the case may be (and Abraxas and  Vessels,  as the case may be, will
pay  expenses  in  advance  of the  final  disposition  of any  such  action  or
proceeding  to each  Indemnified  Party to the full  extent  permitted  by law).
Vessels,  Abraxas,  and Sub have  agreed  that all  rights  to  indemnification,
including provisions relating to advances of expenses incurred in defense of any
action or suit,  existing in favor of the  Indemnified  Parties  with respect to
matters  occurring  through the Effective Time, will survive the Merger and will
continue  in full  force and effect for a period of not less than six years from
the Effective Time.

         The Merger  Agreement  further  provides that for a period of six years
after the  Effective  Time,  Abraxas will cause to be  maintained  in effect the
current policies of directors' and officers' liability  insurance  maintained by
Vessels  (except that Abraxas may substitute  therefor  policies of at least the
same  coverage  and amounts  containing  terms and  conditions  that are no less
advantageous in any material respect to the Indemnified  Parties),  with respect
to matters  arising before the Effective  Time,  except that Abraxas will not be
required to pay an annual  premium for such  insurance  in excess of 150% of the
last annual  premium paid by Vessels prior to the date of the Merger  Agreement,
but in such case will  purchase as much  coverage as it maintains  for directors
and officers of Abraxas.

         Employee Benefit Matters.  Abraxas, Sub, and Vessels have agreed in the
Merger Agreement to certain matters with respect to the compensation and benefit
programs of Vessels and its  subsidiaries.  The Merger  Agreement  provides that
Abraxas will,  and will cause its  subsidiaries  following  the  Effective  Time
(including Vessels) to: (i) honor and provide for payment of all obligations and
benefits  under all Vessels Plans in accordance  with their terms;  (ii) provide
employee  benefits  which are  substantially  comparable in the aggregate to the
level of employee  benefits  provided by Vessels and its subsidiaries  under the
Vessels  ERISA Plans in effect as of the Closing for the benefit of employees or
former  employees  who  are or  had  been  employees  of  Vessels  or any of its
subsidiaries  on or before the Closing  ("Covered  Employees"),  until the sixth
month anniversary of the Closing; (iii) honor and provide for the payment of all
obligations  and benefits under all employment or severance  agreements  between
Vessels  and any Covered  Employee  in  accordance  with their  terms;  and (iv)
maintain the Vessels Oil and Gas Company  Employee  Savings Plan in effect until
the six month anniversary of the Closing.

         The Merger Agreement  further  provides that, if Covered  Employees are
included  in any  benefit  plan  (including  without  limitation  provision  for
vacation) of Abraxas or its subsidiaries,  Covered Employees will receive credit
as employees of Vessels and its subsidiaries to the same extent such service was
counted  under similar  plans of Vessels for purposes of  eligibility,  vesting,
eligibility  for  retirement,  and,  with respect to vacation,  disability,  and
severance, benefit accrual.

         In the Merger Agreement,  the parties thereto acknowledged that nothing
therein will be deemed to be a  commitment  on the part of Abraxas or Vessels to
provide employment to any person for any period of time.

         Fees and  Expenses.  The  Merger  Agreement  provides  that,  except as
described above,  all costs and expenses  incurred in connection with the Merger
Agreement and the transactions contemplated by the Merger Agreement will be paid
by the  party  incurring  the  expenses,  except  that  the  costs  incurred  in
connection  with  printing and mailing proxy  materials to Abraxas  stockholders
will be paid by Abraxas.

Restrictions on Resales by Affiliates

         The  shares  of  Abraxas   Common  Stock  to  be  received  by  Vessels
stockholders  in  connection  with the  Merger  have been  registered  under the
Securities Act and, except as set forth in this paragraph, may be traded without
restriction.  The shares of Abraxas Common Stock to be issued in connection with
the Merger and  received by persons who are deemed to be  "affiliates"  (as that
term is defined in Rule 144 under the  Securities  Act) of Vessels  prior to the

                                       38
<PAGE>

Merger  may be resold  by them  only in  transactions  permitted  by the  resale
provisions  of Rule 145 under the  Securities  Act (or,  in case any such person
should become an affiliate of Abraxas,  Rule 144 under the Securities Act) or as
otherwise permitted under the Securities Act. Accordingly,  the Merger Agreement
provides that Vessels will use all reasonable efforts to cause its affiliates to
execute an  agreement  (an  "Affiliates'  Agreement")  to the  effect  that such
persons will not sell,  transfer or otherwise dispose of Abraxas Common Stock at
any  time in  violation  of the  Securities  Act or the  rules  and  regulations
promulgated thereunder,  including Rule 145. Abraxas has agreed to grant certain
registration  rights to  former  Vessels  stockholders  in  connection  with the
Merger. See "Description of Abraxas Capital Stock -- Registration Rights."

Escrow of Shares

         At the Closing,  Abraxas and a  representative  of the  stockholders of
Vessels will enter into the Escrow  Agreement  pursuant to which an aggregate of
472,222   shares  of  Abraxas  Common  Stock  will  be  issued  to  the  Vessels
stockholders   and  deposited   into  an  escrow   account  to  secure   certain
reimbursement  obligations of the stockholders of Vessels to Abraxas relating to
the breach of certain  representations  and  warranties  set forth in the Merger
Agreement and liabilities, if any, arising under the Supply Contract.

         The Escrow Shares include the Supply  Contract Escrow Shares which will
be collateral for claims related to the Supply  Contract.  These shares will not
be deposited into the escrow account if the Supply Contract is Terminated  prior
to the Closing.  Generally,  a Termination means (i) a termination of the Supply
Contract  pursuant to its terms,  (ii) an assignment of the Supply Contract with
no  liabilities or  obligations  retained by Vessels or (iii) Vessels'  entering
into other  substantially  similar  natural gas supply  contracts  and commodity
price  swaps  sufficient  to  cause  the  floating  price in such  other  supply
contracts to be exchanged for the fixed price of the Supply Contract without any
residual  gain or  loss.  If the  Supply  Contract  is not  Terminated  prior to
Closing, however, the Supply Contract Escrow Shares will remain in escrow and be
subject to certain claims by Abraxas for damages related to the Supply Contract.
Generally,  such  damages  will  include  any  damages  required  to be paid for
Vessels'  breach  of  the  Supply  Contract  and  any  damages  related  to  the
Termination of the Supply Contract. Such damages shall be adjusted for (i) gains
or losses from the  settlement  of put options and call options  entered into by
Vessels to hedge the Supply  Contract  sales prices,  (ii) net realized gains or
losses from sales of gas pursuant to the Supply Contract from August 31, 1997 to
the date of Termination and (iii) net revenues from the purchase and sale of gas
through certain of Vessels' transportation agreements. To the extent the offsets
and  adjustments  exceed the  damages,  Abraxas will deposit cash funds into the
escrow  account  (the "Escrow Cash  Payment") to be  distributed  to the Vessels
stockholders.  The Supply Contract  Escrow Shares,  and any Escrow Cash Payment,
will be released to the Vessels  stockholders  15 days after the  Termination of
the Supply  Contract,  provided a  sufficient  number of shares  will  remain in
escrow as collateral for any pending or unresolved  claims related to the Supply
Contract until such claims are resolved.

         In  addition,  at the  Closing,  Abraxas  and a  representative  of the
stockholders  of  Vessels  will  enter  into  the  Provisional   Payment  Escrow
Agreement,  pursuant to which 75% of the shares of Abraxas  Common  Stock issued
pursuant  to the  Projected  Provisional  Payment,  or 767,657  shares,  will be
deposited into the Provisional Payment Escrow, to be released on the Provisional
Payment Date as necessary to pay the Provisional Payment.

Board Representation and Voting Agreement

         Pursuant to the Voting  Agreement,  each of the executive  officers and
directors of Abraxas has agreed to vote any shares of Abraxas Common Stock owned
by him in favor of the Merger and the Share Issuance at the Special  Meeting and
to vote for  Robert F.  Semmens as a  director  of  Abraxas  at the 1998  Annual
Meeting of Stockholders for a three-year term.


                                       39
<PAGE>


         Pursuant to the Letter  Agreement to be executed  and  delivered at the
Closing,  Abraxas  has  agreed  to  appoint  Robert F.  Semmens  to the Board of
Directors at the Closing and to nominate Mr. Semmens as a director of Abraxas at
the  1998  Annual  Meeting  of  Stockholders  for a  three-year  term  and  each
subsequent annual meeting of the stockholders of Abraxas beginning with the 2001
Annual  Meeting until the later of (i) the release of all of the Escrow  Shares,
(ii) the receipt by the Vessels stockholders of the Provisional Payment or (iii)
the date upon which  Beacon or its  affiliates  no longer own 15% or more of the
aggregate  number of votes  which  may be cast by  holders  of those  securities
outstanding  of Abraxas which entitle the holders  thereof to vote  generally on
all matters submitted to Abraxas' securityholders for a vote.

Accounting Treatment

         The  Merger  will  be  accounted  for  under  the  purchase  method  of
accounting,  in accordance with generally accepted accounting principles.  Under
the  purchase  method of  accounting,  the  purchase  price paid by Abraxas  for
Vessels  (including  direct  costs  of the  Merger)  will  be  allocated  to the
identifiable  assets  of  Vessels  based  upon  estimates  of the fair  value of
Vessels' identifiable assets and liabilities as of the Effective Time. After the
Merger,  the  financial  condition  and results of operations of Vessels will be
included in the  consolidated  financial  condition and results of operations of
Abraxas.

                           CERTAIN FEDERAL INCOME TAX
                           CONSEQUENCES OF THE MERGER

Abraxas

      Set forth  below is a summary  discussion  of certain  federal  income tax
consequences of the Merger to Abraxas. The discussion is based upon the Internal
Revenue  Code of 1986,  as amended,  reports  and  statements  of  Congressional
Committees,  Treasury Regulations (the "Regulations"),  published rulings of the
IRS and court decisions as in effect on the date of this Registration Statement.
Future legislation,  administrative changes or court decisions may significantly
modify the statements made herein; furthermore,  any such changes may or may not
apply retroactively.  Accordingly,  no assurance can be given that the foregoing
legal precedents will remain in full force and effect.

      The  discussion  does not address  any  foreign,  state,  local or federal
alternative  minimum tax consequences.  The discussion also does not address any
aspects of federal income  taxation that may be relevant to the  shareholders of
Vessels.  The  discussion  below  is only a  summary  and not  intended  to be a
complete analysis or a substitute for careful tax planning.

      The federal income tax  consequences of the Merger to Abraxas are expected
to be as follows:

      (a) No gain or loss will be recognized by Abraxas, Abraxas shareholders or
Sub in connection with the Merger;

      (b) The basis of the Vessels assets will remain unchanged; and

      (c) As a  result  of  the  Merger,  any  of  Vessels  net  operating  loss
carryovers,  credit  carryovers or any net  unrealized  built-in  losses will be
subject to an annual use limitation under Sections 382 and 383 of the Code.

Vessels

         The   following  is  a  discussion  of  certain   federal   income  tax
consequences  of the  Merger  to  Vessels  and the  Vessels  stockholders.  This
discussion is based on provisions of the Code,  the  Regulations  thereunder and
rulings and court  decisions as of the date hereof,  all of which are subject to
change,  possibly   retroactively.   The  discussion  is  included  for  general
information purposes only.

                                       40
<PAGE>

         The Merger. At or prior to the Effective Date,  Vessels will receive an
opinion (the "Tax  Opinion"),  unless waived by the Vessels  stockholders,  from
King &  Spalding  that,  based  upon its  review of the  Merger  Agreement,  the
Registration  Statement  of which  this  Proxy  Statement-Prospectus  is a part,
certain other facts and documents which it has considered relevant,  and certain
representations made to it by Vessels, Abraxas and Sub, the Merger will have the
federal income tax consequences set forth below:

         (1) the Merger will constitute a "reorganization" within the meaning of
Section 368(a) of the Code;

         (2) no gain or loss will be recognized by the Vessels stockholders upon
the  exchange in the Merger of their  Vessels  Common  Stock for Abraxas  Common
Stock;

         (3) the aggregate tax basis of the Abraxas Common Stock received in the
Merger by each Vessels  stockholder  will be the same as the aggregate tax basis
of the Vessels Common Stock exchanged for such Abraxas Common Stock; and

         (4) the holding  period of the  Abraxas  Common  Stock  received in the
Merger by each  Vessels  stockholder  will  include the  holding  period of such
stockholder in the Vessels Common Stock exchanged for such Abraxas Common Stock,
provided  that  the  Vessels  Common  Stock  is held as a  capital  asset on the
Effective Date.

         In rendering  the Tax Opinion,  counsel will rely upon certain  written
representations  as to  factual  matters by  appropriate  officers  of  Vessels,
Abraxas and Sub. Such  representations  are customary for opinions of this type;
the Tax Opinion cannot be relied upon,  however,  if any such representation is,
or later  becomes,  inaccurate.  No ruling from the IRS with  respect to the tax
consequences of the Merger has been, or will be, requested,  and the Tax Opinion
will not be binding  upon the IRS or the courts.  If the Merger is  consummated,
and it is later determined that the Merger did not qualify as a "reorganization"
under the Code, then each Vessels  stockholder  would recognize  taxable gain or
loss equal to the difference between the fair market value of the Abraxas Common
Stock  received  by him or her in the  Merger  and his or her tax  basis  in the
Vessels Common Stock exchanged therefor.

         The  foregoing  discussion  does not  consider  the tax  effects of the
Escrow Arrangement, the Escrow Cash Payment, or the Provisional Payment
Arrangement, each of which are discussed below.

         The  Escrow  Arrangement.  Pursuant  to  Section  1.09  of  the  Merger
Agreement,  at or prior to the Effective Time, Abraxas will deposit certificates
representing  472,222 shares of Abraxas Common Stock into an escrow account (the
"Escrow"). The conditions of the Escrow (the "Escrow Arrangement") are set forth
in the Escrow Agreement.

         For federal income tax purposes, shares of Abraxas Common Stock held in
the  Escrow  should be  treated  as owned by the  former  Vessels  stockholders,
notwithstanding  the fact that such shares may be forfeited at a later date.  If
shares of Abraxas  Common Stock held in the Escrow are delivered back to Abraxas
in satisfaction of Claims pursuant to Section 4(c) of the Escrow Agreement, each
former Vessels  stockholder should be treated as having sold his or her pro rata
portion of those  shares for their value as  determined  under  Section 4(c) and
should be entitled to increase the tax basis of his or her  remaining  shares of
Abraxas Common Stock by the value of the shares so delivered.

         The Escrow  Cash  Payment.  Pursuant  to Section  1.04(a) of the Merger
Agreement and Section 1(e) of the Escrow  Agreement,  Abraxas may be required to
deposit into the Escrow the Escrow Cash Payment,  depending on the occurrence or
non-occurrence  of certain  events by a defined  date (15 days after the date of
the Termination of the Supply Contract);  the Escrow Cash Payment,  if any, will
then be immediately distributed to the Vessels stockholders.

         The Escrow Cash  Payment,  if any, is part of the  consideration  to be
received by the Vessels stockholders in exchange for their Vessels Common Stock.
Generally,  the receipt by a Vessels  stockholder of property other than Abraxas
Common Stock in the Merger will be taxable if the total  consideration  received
exceeds  the  stockholder's  tax basis in his or her  shares of  Vessels  Common
Stock.

                                       41
<PAGE>

         Vessels  believes  that,  because it cannot be  determined  whether the
Escrow Cash Payment will ever be paid, the Escrow Cash Payment will not have any
ascertainable  value at the Effective Time of the Merger.  Accordingly,  Vessels
believes that the Vessels stockholders should not be required to take the Escrow
Cash  Payment into account as  additional  consideration  received in the Merger
unless and until the Escrow Cash  Payment is actually  paid.  If the Escrow Cash
Payment eventually is paid to the former Vessels stockholders, a portion of that
payment may be treated as imputed  interest under Section 1274 of the Code which
will be taxable as ordinary income. The remainder of the payment will be taxable
as  capital  gain to the extent  that the total  consideration  received  in the
Merger  (including the portion of the Escrow Cash Payment not treated as imputed
interest) by a Vessels  stockholder  exceeds such stockholder's tax basis in his
or her shares of Vessels Common Stock.

         The Provisional  Payment  Arrangement.  Pursuant to Section 1.04 of the
Merger Agreement,  the Vessels stockholders will receive in the Merger the right
to receive on April 30, 1999, shares of Abraxas Common Stock equal to 75% of the
Provisional  Payment.  The Merger  Agreement  provides  that an  estimate of the
Provisional  Payment (the  Projected  Provisional  Payment)  will be made at the
Effective Time. In the Merger, Abraxas will issue shares of Abraxas Common Stock
equal to the Projected Provisional Payment, 25% of which will be issued directly
to the Vessels  stockholders  and 75% of which (the "Deposited  Shares") will be
issued to the Vessels  stockholders  and deposited into the Provisional  Payment
Escrow.

         Under the terms and conditions of this  arrangement  (the  "Provisional
Payment Arrangement"), if it turns out that the Provisional Payment is less than
the Projected  Provisional Payment, then shares of Abraxas Common Stock equal to
the  difference  will be returned to Abraxas and the balance  distributed to the
former Vessels stockholders on the Provisional Payment Date. Conversely,  if the
Provisional  Payment  exceeds the Projected  Provisional  Payment,  then all the
Deposited  Shares will be distributed to the former Vessels  stockholders  along
with  additional  shares  of  Abraxas  Common  Stock  equal to the  excess  (the
"Additional Provisional Payment Shares").

         For federal income tax purposes, the Deposited Shares should be treated
as owned by the former Vessels stockholders,  notwithstanding the fact that such
shares may be  forfeited  at a later date.  If any of the  Deposited  Shares are
returned  to  Abraxas   pursuant  to  the  terms  of  the  Provisional   Payment
Arrangement,  the former Vessels  stockholders will recognize no gain or loss on
the return and each Vessels  stockholder  should be entitled to increase the tax
basis of his or her remaining shares of Abraxas Common Stock by the tax basis of
the shares so delivered.

         Although  the  matter is not free from  doubt,  Vessels  believes  that
neither the potential right to receive Additional Provisional Payment Shares nor
the actual  receipt of such shares (if any)  should  trigger any gain or loss to
the  Vessels  stockholders;  however,  if and  when the  Additional  Provisional
Payment Shares are issued to the former Vessels stockholders,  a portion of such
shares will be treated as imputed  interest  under Section 483 of the Code which
will be taxable as ordinary income.

         THIS  DISCUSSION  IS LIMITED TO THE UNITED  STATES  FEDERAL  INCOME TAX
MATTERS  SPECIFICALLY  COVERED  THEREBY,  AND DOES NOT  ADDRESS  ANY  OTHER  TAX
CONSEQUENCES THAT MAY RESULT FROM THE MERGER OR ANY OTHER TRANSACTION (INCLUDING
ANY  TRANSACTION  UNDERTAKEN IN  CONNECTION  WITH THE MERGER).  THIS  DISCUSSION
ASSUMES THE VESSELS  STOCKHOLDERS  HOLD THEIR  VESSELS  COMMON  STOCK AS CAPITAL
ASSETS, AND MAY NOT APPLY TO VESSELS STOCKHOLDERS WHO ARE SUBJECT TO SPECIAL TAX
RULES,  SUCH AS  STOCKHOLDERS,  IF ANY, WHO RECEIVED  THEIR VESSELS COMMON STOCK
UPON THE EXERCISE OF EMPLOYEE  STOCK OPTIONS OR OTHERWISE AS  COMPENSATION,  AND
STOCKHOLDERS  THAT  ARE  INSURANCE  COMPANIES,   SECURITIES  DEALERS,  FINANCIAL
INSTITUTIONS OR FOREIGN PERSONS.  BECAUSE CERTAIN TAX CONSEQUENCES OF THE MERGER
MAY VARY DEPENDING ON THE PARTICULAR  CIRCUMSTANCES  OF EACH  STOCKHOLDER,  EACH
STOCKHOLDER  IS URGED TO CONSULT  HIS OR HER OWN TAX  ADVISOR TO  DETERMINE  THE

                                       42
<PAGE>

PARTICULAR TAX  CONSEQUENCES  TO SUCH  STOCKHOLDER OF THE MERGER  (INCLUDING THE
APPLICATION AND EFFECT OF STATE, LOCAL AND FOREIGN TAX LAWS).

                   INTERESTS OF CERTAIN PERSONS IN THE MERGER

         Certain  members of Vessels'  management  and the Vessels  Board may be
deemed to have  certain  interests  in the Merger  that are in addition to their
interests as stockholders of Vessels generally.  Such interests relate to, among
other things,  provisions in the Merger Agreement  regarding the performance and
provision of obligations  and benefits under existing  severance  agreements and
compensation  and benefit  plans,  and the  indemnification  of and provision of
insurance coverage for the directors and officers of Vessels. Vessels' employees
generally will receive,  upon  termination of  employment,  a severance  payment
equal to six months' salary and a bonus payment equal to three months' salary if
the Merger is consummated and such employees are employed by Vessels at the time
of Closing.  Under the Merger  Agreement,  Abraxas has agreed to provide  former
employees of Vessels with continued  employee  benefits after the Effective Time
as required  by COBRA and to maintain  health  benefit  and other  welfare  plan
coverage for former  Vessels'  employees for six months after the Effective Time
under the plans maintained by Vessels  immediately before the Effective Time. W.
Michael  Neumann,  Jr.,  Vessels'  President and CEO, will receive  either (i) a
bonus equal to one year's salary upon  termination of his employment and, if the
Merger is consummated  and he is employed by Vessels at the time of Closing,  12
monthly payments equal to his current monthly salary or (ii) 24 monthly payments
equal to his current monthly salary. Thomas J. Vessels, Chairman of the Board of
Vessels, will receive a severance payment of $600,000 over three years, $200,000
paid each year, and will be eligible to participate in employee benefit plans in
accordance  with the terms of his  employment  contract.  The Vessels  Board was
aware of these interests and considered them, among other matters,  in approving
the Merger Agreement and the transactions  contemplated thereby. See "The Merger
- -- The Merger Agreement -- Indemnification."

         If the Merger is approved  by Abraxas  stockholders,  at the  Effective
Time,  Robert F. Semmens will be appointed to the Abraxas Board of Directors and
will be  nominated  as a  director  of  Abraxas  at the 1998  Annual  Meeting of
Stockholders to serve a three-year  term. Mr. Semmens is currently a director of
Vessels and a partner of the entities that control VOG Holdings,  LLC,  Vessels'
majority stockholder.

                                APPRAISAL RIGHTS

         Under the DGCL,  appraisal  rights  will be  available  to  holders  of
Vessels Common Stock in connection with the Merger.  Any such holder desiring to
exercise appraisal rights must follow precisely the procedures prescribed by the
DGCL. The holders of Abraxas Common Stock will not have any appraisal  rights in
connection with the Merger or the Share Issuance.  See "The Merger -- The Merger
Agreement --Appraisal Rights" and Annex II.


                                       43
<PAGE>


                                 CAPITALIZATION

         The  following  table  sets  forth  (i)  the  historical   consolidated
capitalization of Abraxas and Vessels at September 30, 1997,  respectively,  and
(ii)  Abraxas'  pro forma  consolidated  capitalization  as of such date (giving
effect to the Merger as of  September  30,  1997).  This table should be read in
conjunction with the financial  statements and related notes appearing elsewhere
in this Proxy Statement-Prospectus.
<TABLE>
<CAPTION>

                                                                                             (Unaudited)
                                                                                     Pro Forma        Pro Forma
                                                   Abraxas          Vessels         Adjustments      Combined as
                                                 Historical        Historical       for Merger         Adjusted
                                               ---------------- ----------------- ---------------- -----------------
                                                                      (dollars in thousands)
<S>                                                <C>              <C>               <C>              <C>      
Debt (including current portion): 
  Credit Agreement                                $      -         $       -         $       -        $       -
   Long-term debt and capital lease
     obligations                                    217,573               272                 -          217,845
                                               ---------------- ----------------- ---------------- -----------------
Total Long-Term Debt                                217,573               272                 -          217,845

Equity:
   Common Stock                                          63                 3                 3               69
   Additional paid-in capital                        51,119            43,501           (33,390)          61,230
   Accumulated deficit                              (15,298)           (8,511)            8,511          (15,298)
   Treasury stock                                      (281)                -                 -             (281)
   Foreign currency translation                      (3,477)                -                 -           (3,477)
                                               ---------------- ----------------- ---------------- -----------------

Total Stockholder's Equity                           32,126            34,993           (24,876)          42,243
                                               ---------------- ----------------- ---------------- -----------------

Total capitalization                               $249,699         $  35,265         $ (24,876)       $ 260,088
                                               ================ ================= ================ =================

</TABLE>

                                       44
<PAGE>


                    UNAUDITED PRO FORMA FINANCIAL INFORMATION


         The following unaudited pro forma financial information is derived from
the  historical  financial  statements  of the  Company  and  Vessels  set forth
elsewhere  in this Proxy  Statement-Prospectus  and is  adjusted  to reflect the
following:

         The  Unaudited Pro Forma  Condensed  Balance Sheet of the Company as of
September  30, 1997 has been  prepared  assuming the Merger was  consummated  on
September  30, 1997.  The  Unaudited  Pro Forma  Statement of  Operations of the
Company for the year ended December 31, 1996 has been prepared assuming the sale
of the DJ Basin Properties by Vessels and the Merger were consummated on January
1, 1996 and have also been  prepared  assuming  the  acquisition  of the Wyoming
Properties, acquired on September 30, 1996, the acquisition of CGGS, acquired on
November 14, 1996, the  acquisition of Portilla and Happy,  acquired on November
14, 1996 and the  acquisition  of the East White  Point and  Stedman  Island 50%
overriding royalty interests, acquired in November 1996, were all consummated on
January 1, 1996. The Unaudited Pro Forma  Statement of Operations of the Company
for the nine months ended September 30, 1997 has been prepared assuming the sale
of the DJ Basin Properties by Vessels and the Merger were consummated on January
1, 1997.  The  historical  revenues and expenses of Vessels,  CGGS,  the Wyoming
Properties,  Portilla,  Happy,  East White  Point and Stedman  Island  represent
amounts  recorded by or with respect to such  businesses or  properties  for the
periods indicated.

         The historical  financial  statements of CGGS were prepared in Canadian
dollars in accordance with Canadian  generally accepted  accounting  principles.
This  information  has  been  adjusted  to  present  the  historical   financial
statements  in  accordance  with United  States  generally  accepted  accounting
principles.  The statements of operations have been translated into U.S. dollars
at the average  exchange  rate of $0.7437 to one Canadian  dollar for the fiscal
year ended  December 31, 1996.  The monetary  amounts on the balance sheet as of
October 31, 1996 have been translated at the period-end exchange rate of $0.7458
to  one  Canadian  dollar.  Non-monetary  amounts  have  been  translated  at  a
historical  November 1, 1994 rate with  changes in the  amounts  since that date
translated at the average rate over the twenty-five month period.  See "Business
of Abraxas- Primary Operating Areas - Western Canada."

         The Company  previously  owned a 50% working interest in Portilla and a
12% working  interest in Happy.  In March 1996, the Company sold it interests in
Portilla and Happy to Acco, LLC ("Acco") for net  consideration of $15.6 million
(the "Acco Sale").  Acco  separately  obtained the release of the 50% overriding
royalty interest in Portilla  previously owned by a third party and subsequently
contributed  its  interests in Portilla and Happy to Portilla - 1996,  L.P. (the
"Partnership"). At the time of the sale of its working interests in Portilla and
Happy, the Company received a 25% interest in the Partnership. In November 1996,
the Company  acquired the  remaining 75% interest in the  Partnership  for $27.5
million and obtained the release of a third party's  overriding royalty interest
in East  White  Point  and  Stedman  Island  for  $9.3  million.  The pro  forma
adjustments  assume that the Company  obtained the release of the third  party's
interest in Portilla, East White Point and Stedman Island at January 1, 1996 and
that the Company owned  Portilla and Happy during the period from March 21, 1996
to November 14, 1996.

         The  Unaudited  Pro  Forma   Condensed   Balance  Sheet   reflects  the
preliminary  allocation  of the purchase  price for the Merger to the assets and
liabilities of the Company.  The final allocation of the purchase price, and the
resulting  effect  on DD&A  expense  in the  accompanying  Unaudited  Pro  Forma
Statement of Operations,  will differ from the preliminary estimates because the
final  allocation  will be based on the purchase  price  allocated to assets and
liabilities  on the  basis of the fair  values  of the  assets  and  liabilities
determined  at  the  end of the  allocation  period  as  allowed  by  Accounting
Principles Board Opinion No. 38.

         The  Unaudited  Pro  Forma  Financial  Information  should  be  read in
conjunction with the notes thereto, the Consolidated Financial Statements of the
Company and the notes thereto and the  historical  financial  statements and the
notes  thereto  relating  to  Vessels,  CGGS,  the  Wyoming  Properties  and the
Overriding  Royalty  Interests in the Portilla Field included  elsewhere in this
Proxy Statement-Prospectus.


                                       45
<PAGE>


         The Unaudited Pro Forma Financial  Information is not indicative of the
financial  position or results of operations of the Company which would actually
have  occurred  if the  acquisitions  and the Merger had  occurred  at the dates
presented or which may be obtained in the future.  In addition,  future  results
may vary  significantly  from the results  reflected in the  Unaudited Pro Forma
Financial  Information  due to  normal  crude  oil and  natural  gas  production
declines,  reductions  in  prices  paid for crude oil and  natural  gas,  future
acquisitions and other factors.

                                       46
<PAGE>
<TABLE>
<CAPTION>


                   UNAUDITED PRO FORMA STATEMENT OF OPERATIONS
                          YEAR ENDED DECEMBER 31, 1996

                                                             COMPLETED ACQUISITIONS                          
                                     -----------------------------------------------------------------------
                                                 CGGS                                                 
                                     -------------------------------                                  
                           Abraxas                                                                     
                          Petroleum              Adjustments                                      East White 
                         Corporation     CGGS     to Reflect   CGGS       Wyoming     Portilla/    Point/    
                          12/31/96    Historical   Sale of     (Net)      Properties    Happy      Stedman/  
                                                  Nevis (a)                             (h)                  
                        -------------------------------------------------------------------------------------
                                                                         (dollars in thousands)
<S>                        <C>         <C>         <C>         <C>         <C>        <C>         <C>     
Operating revenue:
   Oil and gas
     production.........   $ 25,749    $ 14,343    $   --      $ 14,343    $  7,280   $  5,313    $  2,728
   Processing ..........        600      24,269     (20,679)      3,590        --         --          --   
   Rig revenue .........        139        --          --          --          --         --          --   
   Other ...............        165         168        --           168        --         --          --   
                           ---------   ---------   ---------   ---------   ---------  --------    ---------    
Total operating revenue      26,653      38,780     (20,679)     18,101       7,280      5,313       2,728

Operating cost and expenses:
   LOE .................      5,858       3,473          10       3,483       1,844      1,378         465
   Processing ..........        262      13,188     (11,194)      1,994        --         --          --   
   Exploration expense .       --          --          --          --          --         --          --   
   DD&A ................      9,605       8,762      (1,352)      7,410        --        2,090        --   
   Rig operating .......        169        --          --          --          --         --          --   
   G&A .................      1,933       2,625        (583)      2,042        --         --          --   
                           ---------   ---------   ---------   ---------   ---------  --------    ---------
Total operating expense      17,827      28,048     (13,119)     14,929       1,844      3,468         465
                           ---------   ---------   ---------   ---------   ---------  --------    ---------
Operating income (loss)       8,826      10,732      (7,560)      3,172       5,436      1,845       2,263

Other (income) expense:
   Interest income .....       (254)       (236)       --          (236)       --           (2)       --   
   Amortization
     deferred  financing        280       1,776      (1,407)        369        --         --          --   
     fees
   Interest expense ....      6,241      10,271      (5,037)      5,234        --        1,524        --   
   Other ...............        443     (27,735)     27,686         (49)       --           73        --   
                           ---------   ---------   ---------   ---------   ---------  --------    ---------
                              6,710     (15,924)     21,242       5,318        --        1,595        --   
                           ---------   ---------   ---------   ---------   ---------  --------    ---------
Income (loss) before tax      2,116      26,656     (28,802)     (2,146)      5,436        250       2,263
Income tax (expense)
   benefit:
     Current ...........       (176)        219          (7)       (212)       --         --          --   
     Deferred ..........       --         9,020      (9,020)       --          --         --          --   
                           ---------   ---------   ---------   ---------   ---------  --------    ---------
Income (loss)from
   continuing operations      1,940      17,417     (19,775)     (2,358)      5,436        250       2,263
Less dividend
   requirement on
   cumulative  preferred
   stock ...............       (366)       --          --          --          --         --          --   
                           ---------   ---------   ---------   ---------   ---------  --------    ---------
Income (loss) applicable
 to common stockholders     $ 1,574(1) $ 17,417    $(19,775)   $ (2,358)   $  5,436   $    250    $  2,263
                           =========   =========   =========   =========   =========  ========    =========
Earnings (loss) per share
  from continuing 
    operations..........    $  0.03
                           =========
</TABLE>

(1) Excludes loss incurred in connection with extinguishment of debt recorded as
an extraordinary item. 47
<PAGE>
<TABLE>
<CAPTION>
  
                  UNAUDITED PRO FORMA STATEMENT OF OPERATIONS (continued)
                          YEAR ENDED DECEMBER 31, 1996


                                         MERGER
                        -------------------------------------
                                         VESSELS
                        -------------------------------------
                                      Adjustment
                                      to reflect        
                                       Sale of         
                           Vessels     DJ Basin    Vessels        
                           Energy     Properties    Energy        Merger        Pro
                         (Historical)     (b)        (net)      Adjustments    Forma
                        ----------------------------------------------------------------
                                           (dollars in thousands)

<S>                        <C>         <C>         <C>         <C>            <C>     
Operating revenue:
   Oil and gas .........   $ 14,811    $ (7,780)   $  7,031    $   --         $ 62,444
     production
   Processing ..........     38,439     (36,573)      1,866        --            6,056
   Rig revenue .........       --          --          --          --              139
   Other ...............        171        (171)       --          --              333
                          ----------   ---------   ---------   ---------     ----------
Total operating revenue      53,421     (44,524)      8,897        --           68,972

Operating cost and expenses:
   LOE .................      4,813      (3,337)      1,476        --           14,504
   Processing ..........     33,365     (31,030)      2,335        --            4,591
   Exploration expense .      1,713        (775)        938        (938)(c)       --
   DD&A ................      9,754      (5,499)      4,255       2,160(d)      25,520
   Rig operating .......       --          --          --          --              169
   G&A .................      3,238         117       3,355      (3,575)(e)      3,755
                          ----------   ---------   ---------   ---------     ----------
Total operating expense      52,883     (40,524)     12,359      (2,353)        48,539
                          ----------   ---------   ---------   ---------     ----------
Operating income (loss)         538      (4,000)     (3,462)      2,353         20,433

Other (income) expense:
   Interest income .....       --          --          --          --             (492)
   Amortization of
     deferred  financing
     fees..............        --          --          --           600(f)       1,249
   Interest expense ....      4,390      (4,354)         36      10,296(g)      23,331
   Other ...............       --          --          --          --              467
                          ----------   ---------   ---------   ---------     ----------
                              4,390      (4,354)         36      10,896         24,555
                          ----------   ---------   ---------   ---------     ----------
Income (loss) before tax     (3,852)        354      (3,498)     (8,543)        (4,122)
Income tax (expense)
   benefit:
     Current ...........       --          (388)
     Deferred ..........        822          75         747       1,900(i)       2,647
                          ----------   ---------   ---------   ---------     ----------
 Income (loss)from
   continuing operations     (3,030)        279      (2,751)     (6,643)        (1,863)
Less dividend
   requirement on
   cumulative  preferred
   stock ...............       --          --          --          --             (366)
                          ----------   ---------   ---------   ---------     ----------
Income (loss) applicable
 to common stockholders    $ (3,030)   $    279    $ (2,751)   $ (6,643)      $ (2,229)
                          ==========   =========   =========   =========     ==========

                                                                                                                                
Earnings (loss) per
   share from continuing
   operations ..........                                                      $  (0.35)                                            
                                                                             ==========

</TABLE>

                                      47a
<PAGE>

<TABLE>
<CAPTION>

            UNAUDITED PRO FORMA STATEMENT OF OPERATIONS For the Nine
                         Months Ended September 30, 1997


                                   Historical                      Merger
                               ------------------- ---------------------------------------
                                                                  Vessels
                                                   ---------------------------------------
                                                                          Adjustments
                                    Abraxas                               to Reflect
                                   Petroleum                                Sale of              Merger
                                  Corporation         Historical           DJ Basin            Adjustments         Pro Forma
                                                                        Properties (b)
                               ------------------- -----------------  --------------------  ------------------ ------------------
                                                                    (dollars in thousands)
<S>                               <C>                 <C>                <C>                   <C>                 <C>          
Operating revenue:
   Oil and gas production         $      46,920       $       7,060      $      (1,907)        $           -       $      52,073
   Gas gathering,
     processing and                       2,793              14,722            (10,379)                    -               7,136
     marketing
   Rig revenue                              250                   -                  -                     -                 250
   Other                                    728                 773               (773)                    -                 728
                               ------------------- -----------------  --------------------  ------------------  -----------------
Total operating revenue                  50,691              22,555            (13,059)                    -              60,187

Operating costs and
   expenses:
   LOE                                   10,604               2,201               (703)                    -              12,102
   Gas gathering,
     processing and                       1,191              12,929             (9,097)                                    5,023
     marketing
   DD&A                                  19,780               5,737             (1,177)               (1,920)(d)          22,420
   Exploration expense                        -                 914                (28)                 (886)(c)               -
   Rig operations                           214                   -                  -                     -                 214
   G&A                                    3,119               2,223               (315)               (1,431)(e)           3,596
                               ------------------- -----------------  --------------------  ------------------  -----------------
Total operating expenses                 34,908              24,004            (11,320)               (4,237)             43,355
                               ------------------- -----------------  --------------------  ------------------  -----------------
Operating income (loss)                  15,783              (1,449)            (1,739)                4,237              16,832

Other (income) expense:
   Interest income                         (438)                  -                  -                     -                (438)
   Amortization of deferred                 933                  92                  -                     -               1,025
     financing fee
   Interest expense                      18,757               1,503             (1,510)                    -              18,750
   Minority interest                         85                   -                  -                     -                  85
   Other                                    115                   -                  -                     -                 115
                               ------------------- -----------------  --------------------  ------------------  ----------------- 
Income (loss) before tax                 (3,669)             (3,044)              (229)                4,237              (2,705)
Income tax (expense)
benefit:
   Current                                 (156)                  -                  -                     -                (156)
   Deferred                               1,227                 (62)                --                     -               1,165
                               ------------------- -----------------  --------------------  ------------------  -----------------
Net income (loss)                        (2,598)             (3,106)              (229)                4,237              (1,696)

Less dividend requirement
   on cumulative preferred                 (183)                  -                  -                     -                (183)
   stock
                               ------------------- -----------------  --------------------  ------------------  -----------------
Income (loss) applicable to
   common stockholders            $      (2,781)      $      (3,106)     $        (229)        $       4,237       $      (1,879)
                               =================== =================  ====================  ==================  =================

Earnings (loss) per share:        $        (.47)                                                                   $        (.29)
                               ===================                                                              =================


</TABLE>

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

See notes to unaudited pro forma financial information.

                                       48
<PAGE>
<TABLE>
<CAPTION>


                   UNAUDITED PRO FORMA CONDENSED BALANCE SHEET
                            As of September 30, 1997


                                   Historical            Merger
                               ------------------- -------------------
                                    Abraxas
                                   Petroleum            Vessels             Merger
                                  Corporation          Historical         Adjustments             Pro Forma
                               ------------------- ------------------- ------------------      ----------------
                                                           (dollars in thousands)
<S>                                 <C>               <C>                 <C>                     <C>        
Assets:
   Cash                             $   7,559         $         991       $           -           $     8,550
   Accounts Receivable                 10,980                 3,412                   -                14,392
   Other                                  635                 1,111                   -                 1,746
                               ------------------- ------------------- ------------------      ----------------
     Total current assets              19,174                 5,514                   -                24,688

   Property and equipment:
     Oil and gas properties           346,459                56,997             (34,710)(c)           368,746
     Less accumulated DD&A             58,250                15,207             (15,207)(c)            58,250
                               ------------------- ------------------- ------------------      ----------------
   Net property and equipment         288,209                41,790             (19,503)              310,496
   Deferred financing fees              8,432                   425                (425)(c)             8,432
   Other assets                         1,367                   356                   -                 1,723
                               =================== =================== ==================      ================
     Total assets                   $ 317,182         $      48,085       $     (19,928)          $   345,339
                               =================== =================== ==================      ================

Liabilities and stockholders'
   equity:
Total current liabilities           $  28,831         $       6,755       $       2,077 (c)       $    37,663
Long-term debt:
   Senior notes                       215,000                     -                   -               215,000
   Other                                2,330                     -                   -                 2,330
Other liabilities                       2,491                 6,337               2,871 (c)            11,699
Deferred income taxes                  32,024                     -                   -                32,024
Minority interest                       4,380                     -                   -                 4,380
Shareholders' equity:
   Common stock                            63                     3                  (3)(b)
                                                                                      6 (a)                69
   Additional paid-in-capital          51,119                43,501             (43,501)(b)
                                                                                 10,111 (a)            61,230
   Accumulated deficit                (15,298)               (8,511)              8,511 (b)           (15,298)
   Foreign currency                    (3,477)                    -                   -                (3,477)
     translation adjustment
   Treasury stock                        (281)                    -                   -                  (281)
                               ------------------- ------------------- ------------------      ----------------
Total stockholders' equity             32,126                34,993             (24,876)               42,243
                               ------------------- ------------------- ------------------      ----------------
Total liabilities and               
   stockholders' equity             $ 317,182         $      48,085       $     (19,928)          $   345,339
                               =================== =================== ==================      ================
</TABLE>

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

See notes to unaudited pro forma financial information.

                                       49
<PAGE>

               NOTES TO UNAUDITED PRO FORMA FINANCIAL INFORMATION

Note 1. The  Unaudited  Pro Forma  Statement  of  Operations  for the year ended
December 31, 1996 reflects the acquisition of the Wyoming  Properties,  acquired
on September  30,  1996;  the  acquisition  of CGGS net of the sale of the Nevis
Plant (as defined  below)  prior to the  acquisition,  acquired on November  14,
1996; the acquisition of Portilla and Happy,  acquired on November 14, 1996; and
the  acquisition of East White Point and Stedman  Island 50% overriding  royalty
interests,  acquired in November 1996;  (see Note 2 to the Notes to Consolidated
Financial  Statements  of the  Company)  as  well as the  sale  of the DJ  Basin
Properties by Vessels and the Merger,  as if all were  consummated on January 1,
1996. The unaudited pro forma  Statement of Operations for the nine months ended
September 30, 1997  reflects the sale of the DJ Basin  Properties by Vessels and
the Merger as if they were consummated on January 1, 1997.

a. To adjust the results of  operation  of CGGS for the sale of CGGS's Nevis Gas
Processing  Plant and related  assets (the "Nevis  Plant")  which were sold to a
third party just prior to the  acquisition  of CGGS by Abraxas on  November  14,
1996.

b. To adjust the results of operations of Vessels for the sale of certain assets
comprising Vessels' interest in the DJ Basin Properties which were sold in April
1997.

c. To adjust for the capitalization of exploration  activity under the full cost
method of accounting  utilized by Abraxas as compared to the successful  efforts
method of accounting utilized by Vessels.

d. To adjust DD&A  expense for the year ended  December  31, 1996 to reflect the
acquisitions of CGGS, the Wyoming Properties,  the reacquisition of Portilla and
Happy,  the  acquisition  of the 50%  overriding  royalty  interest  in Portilla
previously owned by a third party,  the 50% overriding  royalty interest in East
White Point and Stedman Island,  the sale by Vessels of the DJ Basin  Properties
and the Merger;  and to adjust DD&A expense for the nine months ended  September
30,  1997 to reflect  the sale of the DJ Basin  Properties  by  Vessels  and the
Merger for the nine months ended  September 30, 1997.  DD&A expense of crude oil
and natural gas  properties is computed  using the units of  production  method.
Depreciation of natural gas processing facilities is computed using the straight
line method over the estimated useful life of 18 years.

e. To adjust G&A expense to reflect (1) the reversal of  contractual  management
and  administrative  fees  charged to CGGS on a  percentage  basis and to record
estimated  actual  costs to be  incurred  and (2) to reflect  the  reduction  of
Vessels  expenses  for  the  closing  of  the  corporate  office  including  the
elimination of the administrative personnel.

f. To adjust the  amortization  of the deferred  financing fee for the Company's
credit  facility with First Union  National  Bank of North  Carolina (the "First
Union Credit Facility") and the repayment of certain  debentures of CGGS and the
fees and expenses related to the issuance of the Notes.

g. To adjust  interest  expense  using a rate of 11.5% for the  issuance  of the
Notes and to reflect the  repayment of a revolving  credit and loan facility and
the retirement of the CGGS debentures.

h. Reflects the results of operations of the 50% overriding  royalty interest in
Portilla  previously  owned by a third party for the period from January 1, 1996
to November 14, 1996 and the results from Portilla and Happy previously owned by
the Company for the period March 21, 1996 to November 14, 1996.

i. To reflect the deferred tax benefit relating to the CGGS operating losses.

Note 2. The  Unaudited  Pro Forma  Condensed  Balance  Sheet as of September 30,
1997,  reflects the acquisition of Vessels as if it had occurred as of September
30, 1997 as follows:

     On November 12, 1997, the Company and Vessels executed the Merger Agreement
for  Abraxas'  purchase of 100% of the capital  stock of Vessels in exchange for
Abraxas Common Stock. Under the terms of the Merger Agreement,  the Company will
initially issue approximately 562,070 shares of Abraxas Common Stock in exchange

                                       50
<PAGE>

for all of the capital  stock of Vessels and is  obligated  to issue  additional
shares of Abraxas Common Stock under an agreed to Projected Provisional Payment.
The Projected  Provisional Payment is based upon the Vessels Non-PDP/PDNP EBITDX
for the  period  from  February  1,  1998  to  January  31,  1999.  The  Company
anticipates  issuing to the Vessels  stockholders  and depositing  approximately
767,657 shares of Abraxas Common Stock in the Provisional Payment Escrow account
which will entitle the Vessels stockholders to voting rights and other rights of
ownership  including receipt of any dividends.  Upon the final  determination of
the  Provisional  Payment,  the  number  of shares of  Abraxas  Common  Stock as
determined by the Projected  Provisional  Payment  formula will be released from
the Provisional  Payment Escrow and will be recorded at the current value at the
time the Provisional Payment is determined and such additional shares of Abraxas
Common Stock are released. To the extent the Projected Provisional Payment would
require the issuance of shares in excess of those escrowed,  such shares will be
issued by the Company.

     Additionally,  at the  Closing  the  Company  and a  representative  of the
stockholders of Vessels will enter into the Escrow  Agreement  pursuant to which
an  aggregate of 472,222  shares of Abraxas'  Common Stock will be issued to the
Vessels  stockholders  and deposited  into a separate  escrow  account to secure
certain reimbursement  obligations of the stockholders of Vessels to the Company
relating to the breach of certain  representations  and  warranties set forth in
the Merger Agreement and liabilities, if any, arising under the Supply Contract.

     The Escrow  Shares  include  388,889  shares which will be  collateral  for
claims related to the Supply  Contract (the "Supply  Contract  Escrow  Shares").
These  shares  will not be  deposited  into the  escrow  account  if the  Supply
Contract is Terminated (as defined in the Escrow Agreement) prior to Closing. If
the Supply  Contract is not  Terminated  prior to Closing,  however,  the Supply
Contract Escrow Shares will remain in escrow and be subject to any claims by the
Company for damages related to the Supply  Contract.  The Supply Contract Escrow
Shares,  and  any  Escrow  Cash  Payment,   will  be  released  to  the  Vessels
stockholders  15 days after the Termination of the Supply  Contract,  provided a
sufficient  number of shares will remain in escrow as collateral for any pending
or  unresolved  claims  related to the  Supply  Contract  until such  claims are
resolved. The Supply Contract obligates Vessels to supply a third party with gas
volumes   sufficient  to  cover  the  annual   contract   quantity   obligations
(approximately  1,537,000  Mmbtus).  Ninety-five  percent of the annual contract
quantity  will be  delivered to the third party at prices of $1.70 and $1.65 per
Mmbtu in 1998 and 1999,  respectively,  and at escalated prices, as defined,  in
years  2000 -  2008.  Five  percent  of the  annual  contract  quantity  will be
delivered  to the third party at prices of $2.16 per Mmbtu in 1998 - 1999 and at
escalated prices, as defined, for years 2000 - 2008.

     Under the Escrow Agreement,  the escrow shares ultimately  issuable will be
reduced by any damages  incurred by the Company in payment of such  liabilities.
In connection with the Unaudited Pro Forma Condensed  Balance Sheet at September
30, 1997,  liabilities  have been recorded in the amount of $8.5 million related
to the Escrow Agreement.  To the extent no liabilities are incurred,  the shares
of Abraxas Common Stock issued and deposited in escrow will be released with the
liability  reduced and equity  increased.  The  purchase  price of  $22,643,000,
includes  the number of the 562,070  shares of Abraxas  Common  Stock  initially
issued  ($10,117,000),  the liability related to the Escrow Shares  ($8,500,000)
plus the remaining net liabilities of Vessels being assumed ($4,026,000).

       a.  To record issuance of new common shares:
              Common Stock                                 $          6
              Additional paid-in capital                         10,111

       b. To eliminate Vessels' equity:
              Common Stock                                           (3)
              Additional paid-in capital                        (43,501)
              Accumulated deficit                                 8,511

       c. Allocation of change in basis:
              Decrease in oil and gas properties                 34,710
              Decrease accumulated DD&A                         (15,207)
              Decrease in deferred financing fees                   425
              Increase in current liabilities                     2,077
              Increase in other liabilities                       2,871

                                       51
<PAGE>


                  SELECTED HISTORICAL FINANCIAL DATA OF VESSELS

         The following table sets forth certain consolidated  financial data for
Vessels as of and for each of the periods indicated. The financial data for each
year in the five years ended  December  31,  1996 are  derived  from the audited
financial  statements of Vessels.  The financial  data for the nine months ended
September  30,  1997 and 1996 are  derived  from  Vessels'  unaudited  financial
statements which, in the opinion of management of Vessels, have been prepared on
the same basis as the annual consolidated  financial  statements and include all
adjustments  (consisting of only normal recurring  adjustments)  necessary for a
fair  presentation  of the financial  data for such periods.  The following data
should be read in conjunction with "Vessels Management's Discussion and Analysis
of Financial  Condition and Results of Operations,"  which includes a discussion
of factors materially affecting the comparability of the information  presented,
and Vessels  Consolidated  Financial  Statements and the notes thereto  included
elsewhere in this Proxy  Statement--Prospectus.  The results for the nine months
ended September 30, 1997 are not  necessarily  indicative of results that may be
expected  for the full  year.  Historical  financial  data  are not  necessarily
predictive of Vessels' future results of operations and financial condition.
<TABLE>
<CAPTION>

                                                                                                    Nine Months Ended
                                                     Year Ended December 31,                          September 30,
                                  -------------------------------------------------------------- -------------------------
                                     1992        1993       1994          1995          1996        1996         1997
                                  ----------- ----------------------    ----------   ----------- ----------- -------------
<S>                                 <C>         <C>           <C>         <C>          <C>         <C>         <C>      
Consolidated Statement of                                        (dollars in thousands)
  Operations
Operating revenue:
  Oil and gas production revenues   $ 6,122     $ 5,705       $ 8,463     $13,804      $14,811     $9,951      $   7,060
  Gas gathering, processing and      
   marketing                         41,562      39,155        37,706      39,355       38,439     25,680         14,722 
  Other                                 244         794           260         500          171         29            773
                                  ----------- ------------- ----------- ----------   ----------- ----------- -------------
Total operating revenue              47,928      45,654        46,429      53,659       53,421     35,660         22,555
                                  ----------- ------------- ----------- ----------   ----------- ----------- -------------
Operating costs and expenses:
  Lease operating and production  
   taxes                              3,777       3,040         4,051       4,556        4,813      3,456          2,201
  Gas gathering, processing and
   marketing                         36,057      32,455        31,620      34,034       33,365     21,708         12,929
  Depreciation, depletion and
   amortization                       3,343       3,503         6,146      11,358        9,754      6,733          5,737
  Exploration expense                     -           -           223         272        1,713        300            914
  General and administrative
   expenses                           2,189       3,410         3,095       3,399        3,238      2,413          2,223
                                  ----------- ------------- ----------- ----------   ----------- ----------- -------------
Total operating expenses             45,366      42,408        45,135      53,619       52,883     34,610         24,004
                                  ----------- ------------- ----------- ----------   ----------- ----------- -------------
Operating income (loss)               2,562       3,246         1,294          40          538      1,050         (1,449)
Interest expense                      1,617       2,580         5,321       2,388        3,473      2,387          1,503
Amortization of deferred  
  financing fees                        387         468            13         183          917        147             92
Other (income) expense                    -           -             -       1,344(1)         -          -              -
                                  ----------- ------------- ----------- ----------   ----------- ----------- -------------
Income (loss) before tax and
  extraordinary items                   558         198        (4,040)     (3,875)      (3,852)    (1,484)        (3,044)
Deferred income tax (expense)
  benefit                               343        (148)        1,537       1,579          822        690            (62)
                                  ----------- ------------- ----------- ----------   ----------- ----------- -------------  
Income (loss) before
  extraordinary items                   901          50        (2,503)     (2,296)      (3,030)      (794)        (3,106)
Minority interest                      (680)        (34)            -           -            -          -              -
Extraordinary items (2)                   -           -        (1,503)          -            -          -              -
                                  =========== ============= =========== ==========   =========== =========== =============
Net income (loss)                   $   221     $    16       $(4,006)    $(2,296)     $(3,030)    $ (794)     $  (3,106)
                                  =========== ============= =========== ==========   =========== =========== =============




Consolidated Balance Sheet Data:
Working capital                     $(5,153)    $(3,744)      $ 4,180     $(3,283)     $(12,700)   $(4,626)    $  (1,241)
Total assets                         43,556      67,902        79,901      89,605      120,995    110,557         48,085
Long-term debt and capital lease
  obligations (3)                    13,707      30,443        23,482      32,334       56,282     56,150            272
Stockholders' equity                  9,562      12,362        43,257      40,976       38,099     40,260         34,993
</TABLE>

(1) Consists of recapitalization expense.
(2) Consists of loss incurred in connection  with  extinguishment  of debt.
(3) Includes current maturities of long-term debt and capital lease obligations.

                                       52
<PAGE>


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

             The  following is a discussion of Vessels'  consolidated  financial
condition,  results  of  operations,   liquidity  and  capital  resources.  This
discussion  should  be read  in  conjunction  with  the  Consolidated  Financial
Statements of Vessels and the Notes thereto.

Results of Operations

             The factors which most  significantly  affect  Vessels'  results of
operations  are (i) the sales  prices of crude  oil,  natural  gas  liquids  and
natural  gas,  (ii) the level of total sales  volumes of crude oil,  natural gas
liquids and natural gas, (iii) costs to operate  Vessels' oil and gas properties
and gas processing  facilities,  (iv) cost of third party volumes  purchased for
resale, (v) the level of and interest rates on borrowings and (vi) the level and
success of exploration and development activity.

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

                                                                                             Nine Months Ended
                                                       Year Ended December 31                  September 30
                                               ---------------------------------------- ----------------------------
                                                   1994         1995         1996           1996          1997
                                                   ----         ----         ----           ----          ----

<S>                                               <C>          <C>          <C>            <C>          <C>     
Operating revenue (in thousands):  
     Natural gas sales ..................       $  5,304     $  8,737     $  9,495       $  5,946     $  4,932
       Crude oil and condensate sales .....          3,159        5,067        5,316          4,005        2,128
       Gas gathering, processing and marketing
         revenue ..........................         37,706       39,355       38,439         25,680       14,722
       Other ..............................            260          500          171             29          773
                                               ======================================== ============================
       Total operating revenue                    $ 46,429     $ 53,659     $ 53,421       $ 35,660     $ 22,555
                                               ======================================== ============================

       Operating income (in thousands) ....       $  1,294     $     40     $    538       $  1,050     $ (1,449)
       Natural gas production (Mmcf) ......          4,162        5,664        5,922          4,203        3,265
       Crude oil production (Mbbls) .......            203          279          299            222          117
       Average natural gas sales price ($/Mcf)    $   1.27     $   1.54     $   1.60       $   1.41     $   1.51
       Average crude oil sales price ($/Bbl)      $  15.56     $  18.16     $  17.78       $  18.04     $  18.19
</TABLE>

Comparison  of Nine  Months  Ended  September  30,  1997 to  Nine  Months  Ended
September 30, 1996

             Operating Revenue. During the nine months ended September 30, 1997,
operating  revenue  from  natural  gas and  crude oil and  condensate  sales and
natural gas gathering, processing and marketing decreased significantly to $21.8
million  from  $35.6  million  in the year  earlier  period.  The  decrease  was
primarily  attributable to the effects of the sale of the DJ Basin Properties in
April 1997. As more fully described below under Liquidity and Capital Resources,
Vessels  consummated a  transaction  in April 1997 in which all of its assets in
the DJ Basin  Properties  were sold.  As of  December  31,  1996,  these  assets
represented  approximately  62% of Vessels' net production and 65% of its proved
oil and gas reserves. In conjunction with this transaction, Vessels recognized a
$593,000 gain.

             Lease  Operating   Expenses.   Lease  operating   expenses  ("LOE")
decreased by 36.3% to $2.2 million for the nine months ended  September 30, 1997
from $3.5 million for the same period of 1996.  This  decrease was due primarily
to the effect of the sale of Vessels' DJ Basin assets. Vessels' LOE on a per BOE
basis for the nine months ended September 30, 1997 was $3.33 per BOE as compared
to $3.75 per BOE for the same  period in 1996.  These  lower  costs per BOE were
caused  primarily by the increased  portion of Vessels'  total active wells that
are gas wells, with typically lower unit operating costs,  following the sale of
Vessels' DJ Basin Properties.

                                       53
<PAGE>

             Gas  Gathering,  Processing  and Marketing  Costs.  Gas  gathering,
processing and marketing  costs decreased by 40.4% to $12.9 million for the nine
months ended  September 30, 1997 from $21.7 million for the same period of 1996,
due  primarily to the sale of Vessels' DJ Basin assets which  included  Vessels'
Wattenburg processing plant.

             General and  Administrative.  General and  administrative  expenses
decreased 7.9% to $2.2 million for the nine months ended September 30, 1997 from
$2.4  million for the same period in 1996,  as a result of greater  cost control
and  improvements in business  process and the departure of staff in conjunction
with the sale of Vessels' DJ Basin assets.

             DD&A Expenses.  Depreciation,  depletion and  amortization  expense
decreased  14.8% to $5.7  million for the nine months ended  September  30, 1997
from $6.7  million  for the same period in 1996 due  primarily  to a decrease in
production volume as a result of the sale of Vessels' DJ Basin assets.  Vessels'
depletion  on a per BOE basis for the nine months ended  September  30, 1997 was
$7.43  per BOE as  compared  to $5.96 per BOE in the same  period of 1996.  This
increase  in  depletion  per BOE was due  primarily  to the sale of the DJ Basin
Properties and higher finding costs for the remaining properties.

             Exploration  Expense.  Exploration expense increased by 204% to $.9
million for the nine months  ended  September  30, 1997 from $.3 million for the
same period of 1996.  The increase was due primarily to a dry hole being drilled
in the period ending September 30, 1997.

             Interest Expense.  Interest expense decreased 37.0% to $1.5 million
for the nine months  ended  September  30,  1997 from $2.4  million for the same
period of 1996.  This  decrease is due to lower debt  balances  during 1997 as a
result of a pay down of debt with  proceeds  from the sale of  Vessels' DJ Basin
assets.

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

             Operating  Revenue.  During  the  year  ended  December  31,  1996,
operating  revenue  from  natural  gas and  crude oil and  condensate  sales and
natural gas gathering,  processing and marketing  increased  slightly from $53.2
million in 1995 to $53.3 million in 1996.  The increase in revenues from natural
gas sales  from  $8.7  million  in 1995 to $9.5  million  in 1996 was  primarily
attributable  to a 4.6%  increase in natural gas sales  volumes  resulting  from
Vessels' 1996 drilling program and a 3.8% increase in the average price received
for Vessels' natural gas. The increase in revenues from crude oil and condensate
sales  from  $5.1  million  in 1995  to  $5.3  million  in  1996  was  primarily
attributable  to a 7.2%  increase  in crude  oil and  condensate  sales  volumes
resulting  from  Vessels'  1996  drilling  program  offset  partially  by a 2.1%
decrease in the average price received for Vessels' crude oil and condensate. In
connection with the 1996 drilling program, Vessels successfully completed 19 net
gas wells and 13 net oil wells  during  1996.  The  decrease  in gas  gathering,
processing and marketing  revenue from $39.4 million in 1995 to $38.4 million in
1996 is due to a decrease  in  marketing  revenues  resulting  primarily  from a
reduction in gas user marketing volumes sold to end users offset partially by an
increase in processing  revenues  resulting  from the  acquisition  of the Third
Creek processing plant in August 1996.

             Lease Operating  Expenses.  LOE increased by 5.6% from $4.6 million
for the year ended  December  31,  1995 to $4.8  million  for the same period of
1996.  This  increase  was due  primarily  to the  number of net wells  added by
Vessels in 1996,  certain one time  environmental  compliance  costs incurred in
1996 and  higher  severance  taxes in 1996 due to higher  revenues,  which  were
offset  partially by a reduction  in  operating  expenses in 1996 as a result of
sales of non-strategic properties in December of 1995. Vessels' LOE on a per BOE
basis for 1996 was $3.74 per BOE as compared to $3.73 per BOE in 1995.

             Gas  Gathering,  Processing  and Marketing  Costs.  Gas  gathering,
processing and marketing  costs  decreased by 2.0% from $34.0 million in 1995 to
$33.4 million in 1996, due to a decrease in marketing costs resulting  primarily
from a reduction  in gas  marketing  volumes sold to end users which were offset
partially by an increase in processing  costs  resulting from the acquisition of
the Third Creek processing plant in August 1996.

                                       54
<PAGE>

             G&A Expenses.  General and  administrative  expenses decreased 4.7%
from $3.4 million for the year ended  December 31, 1995, to $3.2 million for the
year  ended  December  31,  1996,  as a  result  of  greater  cost  control  and
improvements in business processes, the departure of staff who were not replaced
and the elimination of recruiting  costs incurred in 1995.  Vessels' G&A expense
on a per BOE basis was $2.52 per BOE in 1996 compared to $2.78 per BOE for 1995.

             DD&A Expenses.  Depreciation,  depletion and  amortization  expense
decreased  14.1% from $11.4 million for the year ended December 31, 1995 to $9.8
million for the year ended  December 31, 1996,  due  primarily to a $2.6 million
impairment of certain oil and gas properties in 1995. Excluding  impairments (in
both years), depreciation, depletion and amortization expense increased 7.5% due
primarily  to costs  associated  with wells  drilled in 1996 and an  increase in
sales volume.  Vessels' depletion on a per BOE basis (excluding impairments) for
1996 was $5.89 per BOE as compared to $6.00 per BOE in 1995.

             Exploration Expense.  Exploration expense increased by 530% to $1.7
million for the twelve  months ended  December 31, 1996 from $.3 million for the
same  period of 1995.  The  increase  was due  primarily  to two dry holes being
drilled and a three  dimensional  seismic  program being completed in the period
ending December 31, 1996.

             Interest  Expense.  Interest  expense  increased  45.4%  from  $2.4
million to $3.5 million for the year end December 31, 1996, compared to the 1995
period.  This  increase is  attributable  to increased  borrowings by Vessels to
finance  its 1996  drilling  program  and  acquisition  of the Third Creek plant
offset by slight improvements in borrowing rates.  Long-term debt increased from
$30.8 million at December 31, 1995 to $55.1 million at December 31, 1996.

Comparison of Year Ended December 31, 1995 to Year Ended December 31, 1994

             Operating  Revenue.  During  the  year  ended  December  31,  1995,
operating  revenue from natural gas, crude oil and condensate  sales and natural
gas gathering,  processing and marketing  increased  15.1% from $46.2 million in
1994 to $53.2  million in 1995.  The increase in revenues from natural gas sales
from $5.3 million in 1994 to $8.7 million in 1995 was primarily  attributable to
a 36.1%  increase in natural gas sales  volumes  resulting  from  Vessels'  1995
drilling program and a 21.3% increase in the average price received for Vessels'
natural gas. The increase in revenues from crude oil and  condensate  sales from
$3.2 million in 1994 to $5.1  million in 1995 was  primarily  attributable  to a
37.4% increase in crude oil and condensate sales volumes resulting from Vessels'
1995 drilling  program and a 16.7%  increase in the average  price  received for
Vessels' crude oil and condensate. During 1995 Vessels successfully completed 28
net gas wells and 5 net oil wells. The increase in gas gathering, processing and
marketing  revenue  from $37.7  million in 1994 to $39.4  million in 1995 is due
primarily to an increase in equity and third party gas available for  processing
as a result of Vessels' 1995 drilling program along with additional spot volumes
processed in 1995.

         Lease Operating Expense.  LOE increased 12.5% from $4.1 million for the
year ended  December 31, 1994 to $4.6 million for the same period of 1995.  This
increase was due  primarily  to the number of net wells added by Vessels  during
the year ended December 31, 1995 and an increase in severance  taxes in 1995 due
to higher revenues.  Vessels' LOE on a per BOE basis for the year ended December
31,  1994 was $4.52  per BOE as  compared  to $3.73  per BOE for the year  ended
December 31, 1995.  The decrease from 1994 to 1995 in LOE per BOE was the result
of a  proportionately  greater increase in volumes compared to costs as a result
of Vessels' 1995 drilling program.

         Gas  Gathering,   Processing  and  Marketing   Costs.   Gas  gathering,
processing and marketing  costs  increased by 7.6% from $31.6 million in 1994 to
$34.0  million in 1995,  due  primarily to an increase in equity and third party
gas available for processing as a result of Vessels' 1995 drilling program along
with additional spot volumes processed in 1995.

         G&A Expenses.  G&A expense  increased by 9.8% from $3.1 million to $3.4
million,  from the year ended  December 31, 1994 to the year ended  December 31,
1995 as a result of hiring cost and ongoing salaries  associated with additional

                                       55

<PAGE>

staff hired to develop and manage Vessels' new strategic business plan. Vessels'
G&A expenses on a per BOE basis for the year ended  December 31, 1994 were $3.45
per BOE as compared to $2.78 per BOE for the year ended  December 31, 1995.  The
decrease  from 1994 to 1995 in G&A per BOE was the  result of a  proportionately
greater  increase  in  volumes as a result of  Vessels'  1995  drilling  program
compared to costs.

         DD&A  Expenses.   Depreciation,   depletion  and  amortization  expense
increased  84.8% from $6.1 million for the year ended December 31, 1994 to $11.4
million  for  the  year  ended   December  31,  1995.   Excluding   impairments,
depreciation,  depletion and amortization  expense increased 42.5% due primarily
to costs  associated with wells drilled in 1995 and an increase in sales volume.
Vessels' depletion  expenses on a per BOE basis (excluding  impairments) for the
year ended  December  31, 1994 was $4.31 per BOE compared to $6.00 per BOE at in
1995.  The increase  from 1994 to 1995 in depletion per BOE was due primarily to
downward reserve revisions at yearend 1995.

         Interest  Expenses.  Interest expense decreased 55.1% from $5.3 million
to $2.4 million from the year ended December 31, 1994 to the year ended December
31, 1995 period.  This  decrease was  attributable  to repayment of a portion of
Vessels' debt with proceeds from a private equity  placement and refinancing the
balance of  Vessels'  debt at yearend  1994 to debt with a  significantly  lower
interest rate.

Liquidity and Capital Resources

         At September  30, 1997  Vessels had current  assets of $5.5 million and
current  liabilities of $6.8 million  resulting in a working  capital deficit of
$1.3 million.  At December 31, 1996, Vessels had current assets of $11.7 million
and current  liabilities of $24.4 million resulting in a working capital deficit
of $12.7 million.  This compares to a working capital deficit of $3.3 million at
December 31, 1995.

         Vessels presently has no major capital expenditure commitments pending.
Its capital  expenditures  are generally  discretionary  and activity levels are
determined by a number of factors, including oil and gas prices, interest rates,
availability of funds,  quantity and character of identified investment projects
and competition.  Most capital  expenditures  during the past several years have
been for the acquisition and development of properties with  established  proved
and  probable oil and gas reserves  and  acquisition  of natural gas  processing
plants. Vessels' capital expenditures have typically exceeded its cash flow from
operating activities, with the excess funded primarily with bank borrowings.

              In July 1996,  Vessels entered into a $75 million revolving credit
facility with a commercial  bank  syndicate,  which replaced its previous credit
facility.  Borrowings  available under the revolving credit facility are limited
to semiannual  borrowing base determination  amounts.  The borrowing base on the
revolving  credit  facility as of December 31, 1996 was $64 million  compared to
$55  million as of  December  31,  1995.  Borrowings  under the  agreement  bear
interest,  at Vessels'  option,  either at prime or at LIBOR plus 1.25% - 1.65%,
based on the total amount of debt  outstanding  under the facility.  On December
31,  1996,  the  weighted  average  interest  rate was 7.27%.  Interest  is paid
quarterly. The revolving credit facility is secured by virtually all of Vessels'
assets and contains typical  covenants that restrict  distributions,  additional
borrowings  and  exploration  expenditures  and that require the  maintenance of
certain financial ratios. At December 31, 1996, Vessels' current ratio was below
the minimum required by the revolving credit facility. Vessels received a waiver
for this covenant violation from the holder of the note.

         In order to improve its liquidity, Vessels determined in 1996 to pursue
a  transaction  to monetize a portion of its  developed oil and gas reserves and
its natural gas  processing  facilities.  This  objective was satisfied in April
1997 through the sale of Vessels' DJ Basin assets for approximately $80 million.
Following  this  transaction,  Vessels'  revolving  credit  facility  was repaid
completely at such time. In an effort to reduce bank costs,  Vessels  elected to
reduce the borrowing base under the revolving  credit  facility to $6.0 million.
Vessels can elect to increase  the  borrowing  base under the  revolving  credit
facility  in the  future  based  on then  existing  reserves.  This  transaction
significantly  improved Vessels' liquidity and financial  flexibility,  but also
greatly  reduced  Vessels'  oil and gas  property  base and related  cash flows.
Another  consequence of this asset sale was a significant  reduction in Vessels'
inventory of development projects, resulting in an increased portion of Vessels'

                                       56
<PAGE>

capital budget being targeted toward remaining proved  properties and new proved
property  acquisitions  and  exploration.   Vessels'  credit  facility  will  be
terminated at the Effective Time.

         The following is a summary of selected operating data related to the DJ
Basin Properties sold and other oil and gas properties owned by Vessels:

                                       DJ Basin
                                    Properties Sold     Other
                                       April 1997       Assets         Total
                                   --------------------------------------------

     Proved reserves 
     (December 31, 1996)                            
       Oil (Mbbl)                            3,187      1,596            4,783
       Gas (MMcf)                           52,158     44,296           96,454
       MBOE                                 11,880      8,979           20,859

     Proved developed reserves
     (December 31, 1996)
       Oil (Mbbl)                            1,070        954            2,024
       Gas (MMcf)                           35,153     19,069           54,222
       MBOE                                  6,929      4,132           11,061

     1996 net production
       Oil (Mbbl)                              174        125              299
       Gas (MMcf)                            3,749      2,173            5,922
       MBOE                                    799        487            1,286

         Vessels'  revenues,  cash  flow,  and  the  value  of its  oil  and gas
properties  have been,  and will continue to be,  affected by changes in oil and
natural gas prices.  Vessels' ability to maintain current borrowing capacity and
to obtain additional capital on attractive terms is also substantially dependent
on oil and  natural  gas  prices.  As such,  changes  in oil and gas  prices can
significantly  affect  the  amount of  Vessels'  capital  expenditures.  Oil and
natural gas prices are subject to  significant  seasonal and other  fluctuations
that are beyond Vessels' ability to control or predict.

         Vessels periodically enters into futures contracts,  swap agreements or
option  agreements in order to hedge its exposure to price  fluctuations  on the
purchase  or sale of crude oil,  natural gas or natural  gas  liquids.  Gains or
losses  attributable to such contracts and agreements that hedge specific future
deliveries  or  purchases  are  deferred  and  recognized  in  income  when  the
corresponding physical sale or purchase is recorded.

         Vessels is a party to the Supply  Contract,  which is a long term fixed
price  gas sale  contract  that  expires  in 2008 and  provides  for the sale of
approximately  1.5 Bcf of gas per year. To supply the sale,  Vessels  transports
its gas production  from other points to the point of sale, or when  financially
advantageous,  sells its gas production nearer to the point of production, while
buying  gas from  other  parties  at or near the  point  of sale.  When  Vessels
transports its gas production it utilizes firm transportation capacity for which
it  has  contracted  with  interstate  pipelines  for  terms  approximating  and
quantities  greater  than  those  of the  Supply  Contract  for  "forward  haul"
transportation,  and short-term  interruptible  transportation for "back hauls."
Certain  claims  related  to the  Supply  Contract  are  subject  to the  Escrow
Agreement. See "The Merger - Escrow of Shares."


                                       57
<PAGE>


         Under the swap  agreements,  Vessels  receives  or makes  payments to a
counterparty based on the differential between a fixed and floating price. Under
option  agreements,  Vessels will receive  payments from the counterparty if the
floating  price  is less  than a floor  price  and  will  make  payments  to the
counterparty  if the  floating  price is  greater  than the  ceiling  price.  At
December 31, 1996,  Vessels had open swap and option  agreements to hedge future
deliveries as follows:
                                 
                                     Crude Oil (MBbls)   Natural Gas
                                                           (Mmbtus)
                                     ------------------------------------

     Year Ending December 31,
       1997 .....................               214            2,390
       1998 .....................               156            2,280
                                     ====================================
                                                370            4,670
                                     ====================================

              Cash flows from hedging  activities  are  classified  as operating
activities in the Statements of Cash Flows.  Vessels  realized a gain of $88,000
and losses of $264,000 and  $3,257,000 on its hedging  activities in 1994,  1995
and 1996, respectively.

              Vessels is exposed to credit  loss in the event of  nonperformance
by  counterparties  on these swap or option  agreements  but does not anticipate
nonperformance by such counterparties.  The amount of such exposure is generally
equal to the amount of Vessels' unrealized gains, if any, in such swap or collar
agreements.


                                       58
<PAGE>
                  SELECTED HISTORICAL FINANCIAL DATA OF ABRAXAS

         The  following  historical  selected  consolidated  financial  data are
derived  from,  and  qualified  by  reference  to,  the  Company's  Consolidated
Financial Statements and the notes thereto. The statement of operations data for
the nine months  ended  September  30,  1997 is not  necessarily  indicative  of
results for a full year. The consolidated  financial information for each of the
nine month  periods  ended  September  30,  1996 and 1997 are  derived  from the
unaudited  financial  statements and, in the opinion of management,  include all
adjustments  that are of a normal and recurring  nature and necessary for a fair
presentation.  The selected historical consolidated financial information should
be read in conjunction with the Consolidated Financial Statements of the Company
and the notes thereto included elsewhere in this Proxy  Statement-Prospectus and
"Abraxas Management's Discussion and Analysis of Financial Condition and Results
of Operations."
<TABLE>
<CAPTION>
                                                                                                            Nine Months Ended
                                                          Year Ended December 31,                             September 30,
                                      ----------------------------------------------------------------- --------------------------
                                         1992          1993         1994         1995          1996        1996          1997
                                      ------------  ------------ ------------ ------------ ------------ ------------  ------------
                                                                 (in thousands except per share data)
<S>                                     <C>           <C>          <C>          <C>          <C>          <C>           <C>  
Consolidated Statements of Operations
Operating revenue:
  Oil and gas production revenues       $ 2,666       $ 7,275      $11,114      $13,660      $25,749      $11,275       $46,920
  Gas processing revenues                     -             -            -            -          600            -         2,793
  Other revenue                              25           219          235          157          304          123           978
                                      ------------  ------------ ------------ ------------ ------------ ------------  ------------
Total operating revenue                   2,691         7,494       11,349       13,817       26,653       11,398        50,691
                                      ------------  ------------ ------------ ------------ ------------ ------------  ------------
Operating costs and expenses:
  Lease operating and production taxes    1,075         2,896        3,693        4,333        5,858        3,295        10,604
  Gas processing costs                        -             -            -            -          262            -         1,191
  Depreciation, depletion and
   amortization                             957         2,373        3,790        5,434        9,605        4,145        19,780
  General and administrative expenses       770           510          810        1,042        1,933        1,250         3,119
  Other                                     (29)          103          133          125          169          113           214
                                      ------------  ------------ ------------ ------------ ------------ ------------  ------------
Total operating expenses                  2,773         5,882        8,426       10,934       17,827        8,803        34,908
                                      ------------  ------------ ------------ ------------ ------------ ------------  ------------
Operating income (loss)                     (82)        1,612        2,923        2,883        8,826        2,595        15,783
Net interest expense                        892         2,492        2,343        3,877        5,987        1,987        18,319
Amortization of deferred financing
  fees (1)                                    -           649          400          214          280          192           933
Other (income) expense                       98          (136)          67            -          443          293           200
                                      ------------  ------------ ------------ ------------ ------------ ------------  ------------
Income (loss) from continuing
  operations before tax and
  extraordinary items                    (1,072)       (1,393)         113       (1,208)       2,116          123        (3,669)
                                      ------------  ------------ ------------ ------------ ------------ ------------  ------------
Deferred income tax (expense) benefit         -          (187)           -            -          176            -         1,071
Loss from discontinued operations (2)    (2,883)         (280)      (1,335)           -            -            -             -
                                      ------------  ------------ ------------ ------------ ------------ ------------  ------------
Income (loss) before extraordinary 
  items                                  (3,955)       (1,860)      (1,222)      (1,208)       1,940          123        (2,598)
Extraordinary items (3)                       -          (573)      (1,172)           -         (427)        (369)            -
                                      ------------  ------------ ------------ ------------ ------------ ------------  ------------
Net income (loss)                        (3,955)       (2,433)      (2,394)      (1,208)       1,513         (246)       (2,598)
Preferred dividends requirement            (249)         (186)        (183)        (366)        (366)        (274)         (183)
                                      ------------  ------------ ------------ ------------ ------------ ------------  ------------
Net income (loss) applicable to
  common stockholders                   $(4,204)      $(2,619)     $(2,577)     $(1,574)     $ 1,147      $  (520)      $(2,781)
                                      ============  ============ ============ ============ ============ ============  ============
Earnings per share:
  Income (loss) from continuing 
   operations                           $ (1.23)      $ (0.91)     $ (0.02)     $ (0.34)     $  0.23      $ (0.03)      $ (0.47)
  Discontinued operations                 (2.69)        (0.14)       (0.31)           -            -           -               -
  Extraordinary items                         -         (0.29)       (0.27)           -         (.06)       (0.06)             -
                                      ------------  ------------ ------------ ------------ ------------ ------------  ------------
Net income (loss) per common share      $ (3.92)      $ (1.34)     $ (0.60)     $ (0.34)     $  0.17      $ (0.09)      $ (0.47)
                                      ============  ============ ============ ============ ============ ============  ============
Cash dividends per common shares        $   --        $   --       $  --        $   --       $  --        $   --        $   --
                                      ============  ============ ============ ============ ============ ============  ============
Weighted average shares outstanding       1,074         1,947        4,310        4,635        6,794        5,804          5,920
                                      ============  ============ ============ ============ ============ ============  ============
</TABLE>
                                       59
<PAGE>

<TABLE>
<CAPTION>


                                                              At December 31,                              At September 30,
                                       ---------------------------------------------------------------- --------------------------
                                          1992         1993         1994         1995         1996         1996          1997
                                       ------------ ------------ ------------ ------------ ------------ ------------  ------------
                                                                         (dollars in thousands)



<S>                                      <C>          <C>          <C>          <C>          <C>          <C>           <C>     
Consolidated Balance Sheet Data
Working capital (deficit) (4)            $(7,184)     $(1,368)     $(1,605)     $2,633       $6,433       $7,682        $(9,657)
Total assets                              18,017      43,396       75,361       85,067      304,842      130,440       317,182
Long-term debt (5)                         6,602      12,484       41,235       41,557      215,000       85,000       217,330
 Stockholders' equity                      2,233      25,143       28,502       37,063       35,656       36,421        32,126
</TABLE>

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

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

                                       60
<PAGE>


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

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

Results of Operations

         The  Company's  revenue,  profitability  and future  rate of growth are
substantially dependent upon prevailing prices for crude oil and natural gas and
the volumes of crude oil,  natural  gas and NGLs  produced  by the  Company.  In
addition,  the  Company's  proved  reserves  will decline as crude oil, NGLs and
natural gas are produced unless the Company is successful in acquiring producing
properties or conducts successful exploration and development activities.

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

                                                                                   Nine Months Ended
                                                 Years Ended December 31,           September 30,
                                            ---------------------------------   ------------------------
                                                            (dollars in thousands, except per unit data)

                                              1994        1995        1996         1996        1997
                                            -----------  ----------  --------   ----------   ----------
<S>                                         <C>          <C>          <C>       <C>          <C>       
Operating revenue:
   Crude oil sales ......................   $    5,501   $    6,889   $ 8,864   $    5,306   $   13,383
   NGLs sales ...........................        1,193        1,553     4,359        1,350        7,980
   Natural gas sales ....................        4,420        5,218    12,526        4,619       25,557
   Other ................................          235          157       904          123        3,771
                                            ----------   ----------   -------   ----------   ----------
Total operating revenue .................   $   11,349   $   13,817   $26,653   $   11,398   $   50,691
                                            ==========   ==========   =======   ==========   ==========

Operating income ........................   $    2,923   $    2,883   $ 8,826   $    2,595   $   15,783

Crude oil production (MBbls) ............        355.7        401.4     425.2        266.0        712.2
NGLs production (MBbls) .................        113.2        143.4     299.5        106.1        750.9
Natural gas production (MMcf) ...........      2,392.9      3,552.7   6,350.0      2,625.4     14,984.9

Average crude oil sales prices (per Bbl)    $    15.47   $    17.16  $  20.85   $    19.94   $    18.79
Average NGLs sales price (per Bbl) ......   $    10.54   $    10.83  $  14.55   $    12.73   $    10.63
Average natural gas sales price (per Mcf)   $     1.85   $     1.47  $   1.97   $     1.95   $     1.71

</TABLE>

                                       61
<PAGE>


Comparison  of Nine  Months  Ended  September  30,  1997 to  Nine  Months  Ended
September 30, 1996

         Operating  Revenue.  During the nine months  ended  September  30, 1997
operating  revenue  from crude oil,  natural gas and  natural  gas liquid  sales
increased to $46.9  million  compared to $11.3  million in the nine months ended
September  30,  1996.  The $35.6  million  increase  in  revenue  was  primarily
attributable to increased volumes which was partially offset by a decline in the
average  sales price per BOE.  Volume  increases  from 809,670 BOE to 3,961 MBOE
contributed  $43.8  million  which  was  offset  by $(8.2)  million  from  lower
commodity  prices.  Volume increases were due primarily to increased  production
from  acquisitions  of producing  properties  acquired in the fourth  quarter of
1996, as well as increased  production  attributable  to the  Company's  ongoing
development  program on existing  and acquired  properties.  Oil and natural gas
liquids  volumes  increased  by 293% to 1,493  Mbbls from 372 Mbbls for the same
period of 1996.  Acquisitions and subsequent  development of acquired properties
contributed  777  Mbbls  while  ongoing   development  of  existing   properties
contributed 314 Mbbls of the increase.  Natural gas volumes increased from 2,625
MMcf to 14,985 MMcf for the nine months ended  September 30, 1997.  Acquisitions
and subsequent  development of acquired properties  contributed 9,287 MMcf while
existing properties contributed 3,073 MMcf. Average sales prices were $18.79 per
Bbl of crude oil, $1.71 per Mcf of natural gas and $10.63 per Bbl of natural gas
liquids for the nine months ended  September 30, 1997,  compared with $19.94 per
Bbl of crude oil, $1.95 per Mcf of natural gas and $12.73 per Bbl of natural gas
liquids in the same period of 1996.

         Lease Operating Expenses.  LOE and natural gas processing expenses were
$11.8  million for the nine months ended  September  30, 1997,  compared to $3.3
million for the same period of 1996.  The increase of $8.5 million was due to an
increase  in the number of wells the Company  owned as of  September  30,  1997,
compared  to the same  period  of the  prior  year.  LOE on a per  barrel  basis
decreased to $2.68 per BOE for the nine months ended  September  30, 1997,  from
$4.07 for the same period of 1996.

         G&A  Expenses.  G&A expenses  increased  from $1.2 million for the nine
months ended  September  30, 1996,  to $3.1 million for the same period of 1997.
The  increase  is  primarily  attributable  to the hiring of  additional  staff,
including an increase in the personnel at the Company's Canadian  administrative
office to manage and develop properties  acquired in the fourth quarter of 1996.
G&A  expense  on a per BOE basis  decreased  to $.79 per BOE from $1.54 for same
period of 1996.

         DD&A  Expenses.  Due to the increase in sales  volumes of crude oil and
natural gas, DD&A  expenses  increased by $15.6 million to $19.8 million for the
nine months ended  September 30, 1997,  from $4.2 million for the same period of
1996.  DD&A  expense  on a per BOE basis  was $5.00 per BOE for the nine  months
ended  September  30, 1997,  compared to $5.27 per BOE for the nine months ended
September 30, 1996.

         Interest  Expense  and  Preferred   Dividends.   Interest  expense  and
preferred  dividends  increased  to  $18.9  million  for the nine  months  ended
September  30, 1997 from $2.4  million for the six months  ended  September  30,
1996.  The increase was due to increased  levels of borrowings by the Company to
finance  acquisitions  consummated  in 1996.  Long-term  debt increased from $85
million as of September  30,  1996,  to $217.3  million at  September  30, 1997.
Preferred  dividends were  eliminated July 1, 1997 as a result of the conversion
of all outstanding preferred stock into Abraxas Common Stock.

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

         Operating Revenue.  During the year ended December 31, 1996,  operating
revenue from crude oil,  natural gas and natural gas liquids sales,  and natural
gas processing revenues increased 92% from 13.7 million in 1995 to $26.3million.
This increase was primarily  attributable to increased crude oil and natural gas
liquids  sales volumes of 33.0% and natural gas sales volumes of 78.7% which was
attributable  to increased  production  from the producing  properties  that the
Company  owned for the  entire  year as well as  producing  properties  acquired
during the year.  This increase  more than offset the loss of operating  revenue
from  Portilla and Happy during the portion of the year that the Company did not
own the properties.  During 1995, Portilla and Happy contributed $4.6 million in
operating  revenue  compared to $2.0  million in 1996.  Crude oil and NGLs sales
volumes increased from 545 MBbls to 725 MBbls, from 1995 to 1996 and natural gas
sales volumes  increased  from 3.6 Bcf to 6.4 Bcf, from 1995 to 1996 as a result
of  increased  production  volumes  from the  Company's  properties  other  than

                                       62

<PAGE>

Portilla  and  Happy in 1996 as  compared  to 1995 and the  acquisitions  of the
Wyoming Properties, CGGS and the Company's ongoing development drilling program.
Portilla  and Happy  contributed  226.0  MBbls of crude  oil and NGLs  (41.5% of
Company  total) and 492.6 MMcf of natural  gas (13.9% of Company  total)  during
1995 as compared  to 91.7 MBbls of crude oil and NGLs  (12.7% of Company  total)
and 215.6 MMcf of natural gas (3.4% of Company  total) for 1996.  Average  sales
prices were  $20.85 per Bbl of crude oil,  $14.55 per Bbl of natural gas liquids
and $1.97 per Mcf of natural gas for the year ended  December 31, 1996  compared
with $17.16 per Bbl of crude oil, $10.83 per Bbl of natural gas liquid and $1.47
per  MMcf of  natural  gas for the year  ended  December  31,  1995.  A  general
strengthening  of crude oil and natural gas prices at the  wellhead  during 1996
resulted in a higher  average  sales prices  received by the Company  during the
year ended December 31, 1996 compared to the same period in 1995.

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

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

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

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

Comparison of Year Ended December 31, 1995 to Year Ended December 31, 1994

         Operating  Revenue.  Operating revenue from crude oil, NGLs and natural
gas sales increased by 22.9%, from $11.1 million to $13.7 million, from the year
ended December 31, 1994 to the year ended  December 31, 1995.  This increase was
primarily  attributable  to an increase  in crude oil and NGLs sales  volumes of
16.2%,  from 468.9  MBbls to 544.8  MBbls,  and an increase in natural gas sales
volumes of 48.5%,  from  2,392.9  MMcf to 3,552.7  MMcf.  The  increase in sales
volumes were primarily  attributable to the acquisition of 80% of the overriding
royalty interest previously granted to a lender (the "ORRI") and the acquisition
of certain properties located in west Texas (the "West Texas Properties") by the
Company in June 1994 and July 1994,  respectively.  The Company's  average sales
prices for its crude oil,  NGLs and natural gas were $15.47 per Bbl,  $10.54 per
Bbl and $1.85 per Mcf,  respectively,  for the year ended  December  31, 1994 as
compared to $17.16 per Bbl, $10.83 per Bbl and $1.47 per Mcf, respectively,  for
the year ended  December 31, 1995. A general  weakening of natural gas prices at
the wellhead  during the first nine months of 1995  resulted in a lower  average
natural gas sales price  received by the Company  during the year ended December
31, 1995 as compared to the year ended  December  31,  1994.  This  decrease was
partially  offset by an  increase  in average  crude oil prices  received by the
Company  during the year ended  December  31, 1995 as compared to the year ended
December 31, 1994.

         Lease Operating Expenses.  LOE increased by 17.3%, from $3.7 million to
$4.3 million,  from the year ended  December 31, 1994 to the year ended December
31, 1995, primarily due to the Company's owning a greater number of wells during
the year ended  December 31, 1995 than it did during the year ended December 31,
1994.  The Company's LOE on a per BOE basis for the year ended December 31, 1994
was $4.26 per BOE as compared to $3.81 per BOE for the year ended  December  31,
1995.

                                       63


<PAGE>

         G&A Expenses.  G&A expenses  increased by 28.6%,  from $810,000 to $1.0
million,  from the year ended  December 31, 1994 to the year ended  December 31,
1995 as a result of hiring additional staff to manage and develop the West Texas
Properties.  The  Company's  G&A  expenses on a per BOE basis for the year ended
December  31,  1994 were $0.93 per BOE as compared to $0.92 per BOE for the year
ended December 31, 1995.

         DD&A  Expenses.  DD&A  increased  by 43.4%,  from $3.8  million to $5.4
million,  from the year ended  December 31, 1994 to the year ended  December 31,
1995  primarily  as a result of the  increase in sales  volumes of crude oil and
natural gas. The  Company's  DD&A expenses on a per BOE basis for the year ended
December  31,  1994 were $4.37 per BOE as compared to $4.78 per BOE for the year
ended December 31, 1995.

         Interest  Expense  and  Preferred   Dividends.   Interest  expense  and
preferred  dividends increased 68.3%, from $2.5 million to $4.3 million from the
year ended December 31, 1994 to the year ended December 31, 1995, primarily as a
result of the Company's  borrowing  $28.0  million  under the  Company's  credit
facility to acquire the West Texas Properties in July 1994.

Liquidity and Capital Resources

         Capital  expenditures  for the years ended December 31, 1994,  1995 and
1996 were $40.9 million, $12.3 million and $172.9 million, respectively. For the
nine months ended September 30, 1996,  capital  expenditures  were $58.0 million
compared to $44.6 million  during the same period in 1997.  The table below sets
forth the components of these capital expenditures on a historical basis for the
three years ended  December  31,  1994,  1995 and 1996 and the nine months ended
September 30, 1996 and 1997.
<TABLE>
<CAPTION>

                                                                                          Nine Months Ended
                                                  Year Ended December 31                    September 30,
                                          ----------------------------------------   ----------------------------
                                                                  (dollars in thousands)

                                             1994          1995          1996            1996           1997
                                             ----          ----          ----            ----           ----
Expenditure category:
<S>                                        <C>           <C>           <C>            <C>             <C>      
      Property acquisitions (1)            $  33,597     $     719     $ 154,242      $  47,655 (1)   $   2,067
      Development                              7,151        11,398        18,465         10,016          41,980
      Facilities and other                       158           139           206            369             557
                                           ---------     ---------     ---------      ---------       ---------

      Total                                $  40,906     $  12,256     $ 172,913      $  58,040       $  44,604
                                           =========     =========     =========      =========       =========
</TABLE>

(1)  Acquisition  costs include 45,741 shares of Preferred  Stock valued at $4.6
     million in 1994 and $1.1 million of oil and gas  properties  acquired  from
     Cascade Oil & Gas,  Ltd., a subsidiary  of the Company,  in the nine months
     ended September 30, 1996.

         Acquisitions  of  crude  oil  and  natural  gas  producing   properties
beginning during 1994 and continuing through the nine months ended September 30,
1997  account for the majority of the capital  expenditures  made by the Company
since  January  1, 1994.  These  expenditures  were  funded  through  internally
generated cash flow, borrowings from the Company's previous and current lenders,
the issuance of shares of the Company's  Common and Preferred  Stock to property
sellers and the issuance of the Notes.

         At September 30, 1997,  the Company had current assets of $19.2 million
and current  liabilities of $28.8 million resulting in a working capital deficit
of $9.6 million.  This  compares to working  capital of $6.4 million at December
31, 1996 and $7.6 million at September 30, 1996. The material  components of the
Company's  current  liabilities  at September  30, 1997 include  trade  accounts
payable of $14.2 million, revenues due third parties of $2.4 million and accrued
interest of $10.4 million.  Shareholders' equity decreased from $35.7 million at
December 31, 1996 to $32.1 million at September 30, 1997  primarily due to a net
loss incurred during the first nine months of 1997.

                                       64


<PAGE>

         The  Company's  current  budget  for  capital  expenditures  other than
acquisition  expenditures is $80.0 million for 1998. Such  expenditures  will be
made primarily for the development of existing  properties.  Additional  capital
expenditures  may be  made  for  acquisition  of  producing  properties  if such
opportunities  arise, but the Company currently has no agreements,  arrangements
or undertakings regarding any material acquisitions. The Company has no material
long-term capital commitments, other than an estimated $11.0 million pursuant to
the  Development  Plan  related  to the  Vessels  producing  properties,  and is
consequently  able to adjust  the  level of its  expenditures  as  circumstances
dictate. Additionally, the level of capital expenditures will vary during future
periods depending on market conditions and other related economic factors.

         On November 14,  1996,  Abraxas and Canadian  Abraxas  consummated  the
offering of $215 million of the Notes.  Interest on the Notes accrues from their
date of original  issuance  (the "Issue Date") and is payable  semi-annually  in
arrears on May 1 and November 1 of each year,  commencing on May 1, 1997, at the
rate of 11.5% per annum.  The Notes are redeemable,  in whole or in part, at the
option of Abraxas and Canadian  Abraxas,  on or after  November 1, 2000,  at the
redemption  prices set forth below, plus accrued and unpaid interest to the date
of redemption,  if redeemed during the 12-month period  commencing on November 1
of the years set forth below:

                Year                      Percentage
                2000                          105.75%
                2001                          102.875
                2002 and thereafter           100%

         In addition,  at any time on or prior to November 1, 1999,  Abraxas and
Canadian  Abraxas  may,  at  their  option,  redeem  up to 35% of the  aggregate
principal  amount of the Notes  originally  issued with the net cash proceeds of
one or more  equity  offerings,  at a  redemption  price  equal to 111.5% of the
aggregate principal amount of the Notes to be redeemed,  plus accrued and unpaid
interest to the date of redemption;  provided, however, that after giving effect
to any such redemption,  at least $139.75 million aggregate  principal amount of
the Notes remains outstanding.

         The Notes are joint and several  obligations  of Abraxas  and  Canadian
Abraxas,  and rank pari  passu in right of payment  to all  existing  and future
unsubordinated  indebtedness  of Abraxas and  Canadian  Abraxas.  The Notes rank
senior in right of payment to all future  subordinated  indebtedness  of Abraxas
and  Canadian  Abraxas.  The Notes are,  however,  effectively  subordinated  to
secured  indebtedness of Abraxas and Canadian Abraxas to the extent of the value
of the assets securing such indebtedness.

         The Notes are  unconditionally  guaranteed,  jointly and severally,  by
certain of Abraxas' and Canadian  Abraxas' future  subsidiaries (the "Subsidiary
Guarantors"). The guarantees are general unsecured obligations of the Subsidiary
Guarantors  and  rank  pari  passu in right  of  payment  to all  unsubordinated
indebtedness of the Subsidiary  Guarantors and senior in right of payment to all
subordinated  indebtedness  of the  Subsidiary  Guarantors.  The  Guarantees are
effectively subordinated to secured indebtedness of the Subsidiary Guarantors to
the  extent  of the  value  of the  assets  securing  such  indebtedness.  As of
September 30, 1997, Abraxas,  Canadian Abraxas and the Subsidiary Guarantors had
no secured indebtedness outstanding.

         Upon a Change of Control (as  defined in the  Indenture  governing  the
Notes),  each  holder of the Notes  will have the right to require  Abraxas  and
Canadian  Abraxas to  repurchase  all or a portion of such  holder's  Notes at a
redemption price equal to 101% of the principal amount thereof, plus accrued and
unpaid  interest to the date of  repurchase.  In addition,  Abraxas and Canadian
Abraxas  will be  obligated  to offer  to  repurchase  the  Notes at 100% of the
principal  amount  thereof  plus  accrued  and  unpaid  interest  to the date of
repurchase in the event of certain asset sales.

         The net proceeds to Abraxas and  Canadian  Abraxas from the offering of
the  Notes  were  approximately  $207.0  million  after  deducting  underwriting
discounts  and  estimated  offering  expenses  payable by Abraxas  and  Canadian
Abraxas.  Abraxas and  Canadian  Abraxas  used the net proceeds to (i) repay all
amounts  outstanding  under the Company's then existing  credit  facility in the
amount of $85.0 million,  (ii) acquire the outstanding capital stock of CGGS for
$94.7 million,  (iii) acquire Portilla and Happy and repay certain  indebtedness
for $27.5  million  and (iv)  provide  working  capital  for  general  corporate

                                       65


<PAGE>

purposes including future acquisitions and development of producing properties.

         After  consummation of the offering of the Notes and application of the
net proceeds  therefrom,  the Company  increased its total  outstanding  debt to
approximately  $215.1  million.  In addition,  on November 14, 1996, the Company
entered into a credit  facility  (the  "Credit  Facility")  with  Bankers  Trust
Company  ("BT") and other  lenders  concurrently  with the  consummation  of the
offering of the Notes.  The Credit  Facility  provides  for a revolving  line of
credit  with an  availability  of $40  million,  subject  to  certain  customary
conditions including a borrowing base condition.

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

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

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

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

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

                                       66


<PAGE>

         The Indenture also provides that the Company may not, and may not cause
or permit certain of its subsidiaries,  including Canadian Abraxas, to, directly
or indirectly,  create or otherwise cause to permit to exist or become effective
any  encumbrance  or  restriction  on the  ability  of  such  subsidiary  to pay
dividends  or make  distributions  on or in respect of its capital  stock,  make
loans or advances or pay debts owed to Abraxas,  guarantee any  indebtedness  of
Abraxas or transfer any of its assets to Abraxas except for such encumbrances or
restrictions  existing  under or by reason  of:  (i)  applicable  law;  (ii) the
Indenture;  (iii) the Credit Facility; (iv) customary non-assignment  provisions
of any contract or any lease governing leasehold interests of such subsidiaries;
(v)  any  instrument  governing  indebtedness  assumed  by  the  Company  in  an
acquisition,  which  encumbrance  or  restriction  is  not  applicable  to  such
subsidiaries  or the  properties or assets of such  subsidiaries  other than the
entity or the  properties  or assets of the entity so acquired;  (vi)  customary
restrictions  with  respect  to  subsidiaries  of  the  Company  pursuant  to an
agreement  that has been  entered in to for the sale or  disposition  of capital
stock or assets of such  subsidiaries  to be consummated in accordance  with the
terms of the  Indenture  solely in respect of the assets or capital  stock to be
sold or disposed of; (vii) any instrument  governing  certain liens permitted by
the Indenture,  to the extent and only to the extent such  instrument  restricts
the transfer or other  disposition  of assets subject to such lien; or (viii) an
agreement governing  indebtedness incurred to refinance the indebtedness issued,
assumed or incurred  pursuant to an agreement  referred to in clause (ii), (iii)
or  (v)  above;  provided,   however,  that  the  provisions  relating  to  such
encumbrance or restriction contained in any such refinancing indebtedness are no
less favorable to the holders of the Notes in any material respect as determined
by the Board of  Directors  of the  Company in their  reasonable  and good faith
judgment  than  the  provisions  relating  to such  encumbrance  or  restriction
contained in the applicable  agreement referred to in such clause (ii), (iii) or
(v).

         In August 1995,  the Company  entered into a rate swap agreement with a
previous  lender  relating to $25.0 million of principal  amount of  outstanding
indebtedness.  This  agreement  was  assumed by the Banks in  connection  with a
bridge facility that was subsequently paid off. Under the agreement, the Company
pays a fixed  rate of 6.15%  while the Banks pay a  floating  rate  equal to the
USD-LIBOR-BBA  rate for one month  maturities,  quoted on the  eighteenth day of
each  month,  to  the  Company.  Settlements  are  due  monthly.  The  agreement
terminates in August 1998.  At September 30, 1997,  the fair value of this swap,
as determined by BT was approximately $78,000.

         In  connection  with the  re-acquisition  of  Portilla  and Happy,  the
Company  assumed a commodity  price  hedge on variable  volumes of crude oil and
natural gas. Monthly  settlements with amounts either due to or from Christiania
Bank og  Kreditkasse  ("Christiania")  are based on the  differential  between a
fixed and a variable  price for crude oil and  natural  gas.  During  1997,  the
approximate  monthly  volume of crude oil sales  subject  to this  agreement  is
15,800  barrels  at  a  fixed  price  of  $17.20.   This  agreement  reduces  to
approximately  13,200  barrels  per month in 1998,  11,000  barrels per month in
1999,  9,100 barrels per month in 2000 and 8,200 barrels per month in 2001 until
November  1. The fixed  price  paid to the  Company  over this five year  period
averages  $17.55 per barrel.  The natural gas component of this agreement  calls
for  approximately  54,000 MMBTU per month at a fixed price of $1.80 during 1997
with  volumes  decreasing  to 37,000  MMBTU per month in 1998,  24,000 MMBTU per
month in 1999, 19,000 MMBTU per month in 2000 and 15,000 MMBTU per month in 2001
through October.  The fixed price paid to the Company over this five year period
averages $1.84 per MMBTU.

         The Company has also entered into a fixed price  agreement  relating to
approximately  7,500 net Mcf per day of natural gas. This  agreement  expires on
March 31,  1998 and calls for a fixed price of $2.07 per MMBTU being paid to the
Company.

         Operating  activities  during the nine months ended  September 30, 1997
provided $32.6 million cash to the Company  compared to $4.8 million in the same
period in 1996. Net operating income plus non-cash expense items during 1997 and
net changes in  operating  assets and  liabilities  accounted  for most of these
funds.  Investing  activities used $36.1 million during the first nine months of
1997 primarily for development of oil and gas properties. This compares to $41.1
million provided during the same period of 1996.  Financing  activities provided
$2.3  million for the first nine  months of 1997  compared  to  requiring  $41.9
million for the same period of 1996.

                                       67


<PAGE>

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

         For the year ended  December 31, 1995,  operating  activities  provided
$4.5 million of cash.  Investing activities required $10.1 million primarily for
the  development  of existing  properties.  Total cash provided  from  financing
activities  for 1995 was $9.8  million  as the  result of the sale of  1,330,000
shares of Common Stock and  contingent  value rights during  November 1995 which
resulted in net proceeds of $10.1 million.

         During  1994,  operating  activities  provided  $4.4  million  of cash.
Investing  activities  during 1994 utilized  $36.0 million of cash primarily for
the acquisition of the ORRI and the West Texas  Properties for $29.0 million and
the development of producing  properties of $7.2 million.  The Company  borrowed
$40.9 million during 1994,  repaid $12.7 million of long term debt,  sold Common
Stock for  proceeds of $1.5  million and paid  financing  fees and  dividends on
preferred stock resulting in a net  contribution of $29.2 million from financing
activities.

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

         At December  31,  1996,  the Company  had,  subject to the  limitations
discussed below,  $20.1 million of net operating loss carryforwards for U.S. tax
purposes,  of which  approximately  $17.5 million are available for  utilization
without limitation.  These loss carryforwards will expire from 2002 through 2010
if not utilized. At December 31, 1996, the Company had approximately $830,000 of
net operating loss carryforwards for Canadian tax purposes which expire in 2003.
As a result of the  acquisition of certain  partnership  interests and crude oil
and natural gas  properties in 1990 and 1991, an ownership  change under Section
382 of the  Code,  occurred  with  respect  to the  Company  in  December  1991.
Accordingly,  it is expected  that the use of net operating  loss  carryforwards
generated  prior  to  December  31,  1991 of $4.9  million  will be  limited  to
approximately  $235,  000 per year.  As a result of the  issuance of  additional
shares  of Common  Stock for  acquisitions  and  sales of stock,  an  additional
ownership change under Section 382 occurred in October 1993. Accordingly,  it is
expected that the use of all U.S. net  operating  loss  carryforwards  generated
through  October  1993,  or $8.2 million,  will be limited to  approximately  $1
million per year subject to the lower  limitations  described above. Of the $8.2
million net operating loss carryforwards, it is anticipated that the maximum net
operating  loss that may be utilized  before it expires is $5.7 million.  Future
changes in ownership,  including changes as a result of the Merger,  may further
limit the use of the  Company's  carryforwards.  In  addition to the Section 382
limitations,  uncertainties  exist as to the future utilization of the operating
loss  carryforwards  under the criteria set forth under FASB  Statement No. 109.
Therefore, the Company has established a valuation allowance of $5.7 million and
$5.7   million  for   deferred  tax  assets  at  December  31,  1996  and  1995,
respectively.

         As a result of the consummation of the Merger, Abraxas will operate the
existing businesses of Abraxas and Vessels on a combined basis. See "Business of
Abraxas,"  "Business  of Vessels,"  "Capitalization"  and  "Unaudited  Pro Forma
Financial  Information."  The  financial  condition and results of operations of
Abraxas  after  the  Effective  Time  will  not be  directly  comparable  to the
historical financial conditions or results of operations of Abraxas and Vessels,
either individually or on a combined basis. See "Vessels Management's Discussion
and  Analysis of  Financial  Condition  and Results of  Operation  and  "Abraxas
Management's  Discussion  and  Analysis of  Financial  Condition  and Results of
Operations" contained elsewhere in this Proxy Statement-Prospectus.

         Abraxas  will have  three  principal  sources of  liquidity  during the
period  immediately  following  the  Effective  Time:  (i)  cash on  hand,  (ii)
borrowing  capacity  under the  Credit  Facility  and (iii)  cash  generated  by
operations.   See  "Unaudited  Pro  Forma  Financial  Information."  Immediately
following the Effective Time, Abraxas expects to have at least $5.0 million of
borrowing capacity under the Credit Facility.

                                       68


<PAGE>

         While the  availability of capital  resources  cannot be predicted with
certainty and is dependent upon a number of factors including factors outside of
management's   control,   management  believes  that  Abraxas'  cash  flow  from
operations plus availability  under the Credit Facility will be adequate to fund
operations and planned  capital  expenditures.  Abraxas may also sell additional
equity  or debt  securities  in order to fund  operations  and  planned  capital
expenditures as well as to finance future acquisitions.



                                       69
<PAGE>


                               BUSINESS OF ABRAXAS

General

         Abraxas is an  independent  energy  company  engaged  primarily  in the
acquisition,  exploration,  development  and production of crude oil and natural
gas.  Since January 1, 1991,  the Company's  principal  means of growth has been
through the acquisition and subsequent development and exploitation of producing
properties and related assets.  The Company  utilizes a disciplined  acquisition
strategy,  focusing  its efforts on  producing  properties  and  related  assets
possessing  the  following  characteristics:   a  concentration  of  operations;
significant,  quantifiable  development  potential;  historically  low operating
expenses; and the potential to reduce G&A expenses per BOE. The Company seeks to
complement   its   acquisition   and   development   activities  by  selectively
participating in exploration projects with experienced industry partners.  After
giving effect to the Merger , the Company's principal areas of operation will be
Texas, western Canada,  northwestern  Colorado and southwestern Wyoming and will
own  interests in 1,041,676  gross acres  547,942 net acres) and 754 gross wells
(432.7 net wells),  544 of which will be operated  by the  Company.  The Company
will  also  own  varying  interests  in 20  natural  gas  processing  plants  or
compression facilities.  On a pro forma basis, at December 31, 1996, the Company
had total proved  reserves of 52,739 MBOE (66% natural gas), of which 85.68% was
proved developed with a PV-10 of $463.0 million.

         The Company's  acquisition,  development,  exploitation and exploration
activities  have  substantially  increased  the Company's  proved  reserve base,
average daily  production  and natural gas  processing  plant  throughput  while
decreasing its total  operating and G&A expenses per BOE. After  consummation of
the  Merger,  the Company  will have  completed  18  acquisitions  of  producing
properties totaling 56,309 MBOE of proved reserves at an average net acquisition
cost of $4.20 per BOE since  January  1,  1991.  From  January  1,  1991,  on an
historical  basis,  to September 30, 1997,  on a pro forma basis,  the Company's
total proved  reserves  increased from 889 MBOE to 52,739 MBOE;  aggregate PV-10
increased from $11.9 million to $463.0 million; and average net daily production
increased from 0.141 MBOE per day, on a historical  basis, to 16.4 MBOE per day,
on a pro forma basis.  As of September 30, 1997, the Company had net natural gas
processing  capacity of 130 MMcf per day. From the year ended December 31, 1991,
on an historical  basis,  to the nine months ended  September 30, 1997, on a pro
forma basis,  the Company's  direct  operating  expenses per BOE decreased  from
$6.30 per BOE to $2.71 per BOE and G&A expenses per BOE decreased from $5.39 per
BOE to $.80 per BOE.

         The Company was founded in 1977 by Robert L.G.  Watson,  the  Company's
Chairman of the Board,  President  and Chief  Executive  Officer.  The Company's
principal  offices  are  located  at 500 North Loop 1604  East,  Suite 100,  San
Antonio, Texas 78232 and its telephone number is (210) 490-4788.

Recent Developments

         On October 15,  1997,  Canadian  Abraxas and Cascade Oil and Gas LTD, a
subsidiary of Abraxas  ("Cascade"),  completed the  acquisition  of the Canadian
assets of Pacalta  Resources  LTD for C$21.75  million in cash and four  million
Cascade Special Warrants. The initial ownership of the assets acquired is 92% by
Canadian  Abraxas and 8% by Cascade.  Cascade has the opportunity to acquire the
Canadian  Abraxas  ownership upon arranging  satisfactory  financing in 1998. At
closing, the Pacalta properties were producing 115net barrels of oil per day and
8,000net  Mcf of gas per day.  The  assets  acquired  are  expected  to  provide
significant  development  and exploratory  opportunities  for the Company in the
future.

Primary Operating Areas

Texas

         Abraxas Cherry Canyon Field, Ward County, Texas. In connection with the
acquisition of the West Texas  Properties in July 1994, the Company  acquired an
interest in approximately  7,360 gross acres (4,500 net acres) in this field and
currently operates 20 of the wells in its acreage. The Company drilled its first
shallow pool exploratory test well in this field in March 1995. Since that time,

                                       70

<PAGE>

this field has become the principal focus of the Company's development activity.
To date,  40  wells  have  been  drilled  and  completed  in one or more  sands,
including the Bell Canyon,  Cherry  Canyon and Brushy  Canyon Sands.  Four other
sands have been production tested with additional sands remaining behind pipe to
be tested in the future.  The Company is currently  attempting to delineate this
field by  drilling  wells in several  different  areas.  The Company has not yet
drilled any dry holes in this field. Two wells have been drilled by Chevron USA,
Inc. and Southwest  Royalties,  Inc.  offsetting the Company's acreage.  Both of
these  wells are  currently  being  completed  and, if  successful,  could prove
additional  locations on the Company's acreage. At December 31, 1996, this field
had estimated  net proved  reserves of 4,767 MBOE (38% natural gas) with a PV-10
of $53.5 million,  87% of which was attributable to proved  developed  reserves.
For the nine months ended  September 30, 1997, this field produced an average of
approximately  1,175 net Bbls of crude oil and NGLs and approximately  4,815 net
Mcf of natural gas per day from 29.4 net wells.

         Delaware Area (Howe,  ROC, Block 16,  Taurus,  Gomez and Nine Mile Draw
Fields),  Ward,  Reeves,  and Pecos  Counties,  Texas.  In  connection  with the
acquisition  of the West Texas  Properties  in July 1994,  the Company  acquired
working interests ranging from 18% to 100% in 35 wells, 29 of which are operated
by the Company.  These fields produce from Devonian,  Wolfcamp,  Ellenburger and
Cherry Canyon  formations  at depths  ranging from 6,500 feet to 17,600 feet. At
December 31, 1996, these fields had estimated total net proved reserves of 3,135
MBOE  (85%  natural  gas)  with a PV-10 of  $26.3  million,  100% of  which  was
attributable to proved developed  reserves.  For the nine months ended September
30, 1997,  these  fields  produced an average of  approximately  145 net Bbls of
crude oil and NGLs and 4,121 net Mcf of natural gas per day from 23.5 net wells.

         Portilla Field,  San Patricio  County,  Texas.  The Company  originally
acquired a 50% working  interest in the  Portilla  Field  ("Portilla")  in April
1993. In March 1996, the Company sold its interest in Portilla to a third party,
which subsequently  contributed it to a limited partnership of which the Company
owned  a 25%  interest  (the  "Partnership").  In  November  1996,  the  Company
reacquired Portilla, including a 50% interest previously owned by a pension fund
(the "Pension  Fund").  This field was  discovered in the 1950's by Superior Oil
Company and produces  from  numerous  Miocene,  Frio and  Vicksburg age sands at
depths  ranging from 4,000 feet to 9,000 feet. At December 31, 1996,  this field
had estimated  net proved  reserves of 4,146 MBOE (20% natural gas) with a PV-10
of $36.1 million,  100% of which was attributable to proved developed  reserves.
For the nine months ended  September 30, 1997,  the field produced an average of
approximately 616 net Bbls of crude oil and NGLs and approximately 1,339 net Mcf
of natural gas per day from 51 net wells.  The Company owns a 100% interest in a
natural gas processing plant located at Portilla which had aggregate capacity of
approximately 20.0 MMcf of natural gas per day at September 30, 1997. During the
nine months ended September 30, 1997, the Portilla plant processed an average of
approximately  14.1 MMcf of  natural  gas per day and  extracted  an  average of
approximately 213 Bbls of NGLs per day. The Company is currently the operator of
the Portilla plant and all of the wells in the Portilla Field.

         East White  Point  Field,  San  Patricio  County,  Texas.  The  Company
originally  acquired an approximate 30% working  interest in this field in April
1993. In November 1996,  the Company  obtained the release of the Pension Fund's
50% overriding  royalty interest in this field. The field produces crude oil and
natural gas from numerous  sands in the Lower Frio  formation at depths  ranging
from 9,000 feet to 13,000 feet.  At December 31, 1996,  this field had estimated
net proved reserves of 8,171 MBOE (61% natural gas) with a PV-10 of $60 million,
84% of which was attributable to proved developed reserves. The Company operates
11 wells in this  field,  and  Marathon  Oil  Company  ("Marathon")  operates 10
additional wells in which the Company has an interest. For the nine months ended
September 30, 1997, this field produced an average of approximately 347 Net Bbls
of crude  oil and NGLs and 3,100  net Mcf of  natural  gas per day from 11.9 net
wells.  The Company  also owns an  approximate  38%  interest in and  operates a
natural gas  processing  plant in this field.  The East White Point  natural gas
processing  plant, a modern  cryogenic plant with capacity of  approximately  25
MMcf of natural gas per day,  processed an average of approximately  8.6 MMcf of
natural gas per day and extracted approximately 500 Bbls of NGLs per day for the
nine months ended September 30, 1997.

         Stedman Island Field,  Nueces  County,  Texas.  The Company  originally
acquired a 25% working  interest  in this field in April 1993 and an  additional
25% in October 1995. In November 1996,  the Company  obtained the release of the
Pension  Fund's  50%  overriding  royalty  interest  in this  field.  This field
produces  crude oil and natural gas from Frio sands at depths ranging from 8,500
feet to 10,000 feet.  At December 31, 1996,  this field had estimated net proved
reserves of 2,208 MBOE (76% natural gas) with a PV-10 of $16.5  million,  43% of

                                       71


<PAGE>

which was attributable to proved developed  reserves.  For the nine months ended
September 30, 1997, this field produced an average of approximately 215 net Bbls
of crude oil and NGLs and 3,181 net Mcf of natural gas per day from 5 net wells.
production in the field.

         Spraberry  Trend Field,  Midland,  Martin and Reagan  Counties,  Texas.
Since  January 1, 1991,  the Company has acquired  interests in or drilled eight
new wells in this field.  This field  produces at depths ranging from 8,000 feet
to 9,100 feet in multiple sands.  The Company owns interests in 30 wells in this
field,  15 of which  are  operated  by the  Company.  Following  the  successful
completion  of two wells  during the second  quarter of 1996,  eight  additional
proved  undeveloped  locations  were  identified  by the  Company's  independent
petroleum  engineers.  At December 31, 1996, this field had estimated net proved
reserves of 1,689 MBOE (30%  natural  gas) with a PV-10 of $12  million,  64% of
which was attributable to proved developed  reserves.  For the nine months ended
September 30, 1997, the field produced an average of approximately  121 net Bbls
of crude oil and NGLs and  approximately 276 net Mcf natural gas per day from 31
net wells.

Southwestern Wyoming

         The Company  acquired  properties in the Wamsutter area of southwestern
Wyoming (the "Wyoming  Properties")  in September  1996. The Wyoming  Properties
produce  natural gas from  numerous  sands at depths  ranging from 8,500 feet to
12,000 feet. At December 31, 1996, the Wyoming  Properties  had estimated  total
net proved  reserves  of 10,570  MBOE (69%  natural  gas) with a PV-10 of $108.2
million,  87% of which was  attributable to proved developed  reserves.  For the
nine months ended September 30, 1997, the Wyoming Properties produced an average
of  approximately  1,784  net Bbls of crude oil and NGLs and  15,605  net Mcf of
natural gas per day from 42 net wells.

Western Canada

         Producing  Properties.  In January  1996,  the  Company  invested  $3.0
million in Grey Wolf  Exploration  Ltd. ("Grey Wolf"), a privately held Canadian
corporation,  which, in turn,  invested these proceeds in newly-issued shares of
Cascade Oil & Gas Ltd.  ("Cascade"),  an Alberta-based  corporation whose common
shares are  traded on The  Alberta  Stock  Exchange  under the symbol  "COL." In
November 1997, Grey Wolf merged with Cascade. The Company owns approximately 46%
of the outstanding capital stock of Cascade. Cascade owns 30.0 gross (4.3 net to
Cascade)  producing  crude oil and  natural  gas wells and  12,000  net acres of
undeveloped leases in southwestern  Saskatchewan.  These wells produce crude oil
from  multiple  sands at depths  ranging from 4,200 feet to 4,600 feet. A report
prepared by Cascade's  independent  petroleum  engineers  showed  estimated  net
proved  reserves  of 120 MBbls of crude oil with a PV-10 of C$1.24  million,  or
approximately  U.S.$.92  million,  at January 1, 1996. None of these reserves or
values  are  included  in the  report  of the  Company's  independent  petroleum
engineers.  See  " --  Reserves  Information."  During  the  nine  months  ended
September  30,  1997,  Cascade  drilled one dry  exploratory  well and Grey Wolf
drilled six successful development wells.

         In November 1996,  Canadian  Abraxas  acquired CGGS. As of December 31,
1996,  the  producing  properties  acquired by Canadian  Abraxas  from CGGS (the
"Canadian Abraxas Properties") had estimated total net proved reserves of 10,382
MBOE  (88%  natural  gas)  with a PV-10 of  $85.4  million,  88.6% of which  was
attributable to proved developed  reserves.  For the nine months ended September
30, 1997, the Canadian Abraxas  Properties  produced an average of approximately
512 net Bbls of crude oil and NGLs and  22,152  net Mcf of  natural  gas per day
from 101 net wells.


                                       72
<PAGE>


         The  following  table sets forth a summary of certain  information,  by
field, of the Canadian Abraxas Properties:
<TABLE>
<CAPTION>

                                                                         Average Daily Production
                                                                           for Nine Months Ended
                                                                            September 30, 1997
                                                                        ----------------------------
                                                       Reserves at     Crude Oil &
                                                    December 31, 1996      NGLs        Natural Gas
Name of Field         Working        Net Wells           (MBOE)           (Bbls)          (Mcf)
- -------------         --------       -----------         ------           ------          -----
                      Interest
                      --------
<S>                      <C>            <C>             <C>                  <C>            <C>  
Quirk Creek              (1)             3.5             1,692               125             2,530
Sundre                   (2)            10.2             2,475               216             4,412
Bellis                   (3)            17.8               897                 -             2,337
Chinchaga                (4)             2.6               389                 8             2,879
Pouce Coupe              (5)             2.0.              752                 -             2,555
Valhalla                 (6)             6.5               136                 4             2,137
Other (8)                (7)            33.2             4,049               159             5,303
                                   ---------------- --------------------------------- ---------------
Total                                   75.8            10,382               512            22,152

</TABLE>

(1) Canadian  Abraxas owns working interest ranging from 21% to 48% in 13 wells.
(2) Canadian Abraxas owns working  interests ranging from 1% to 70% in 26 wells.
(3) Canadian  Abraxas owns working  interest from 7.5% to 100% in 40 wells.
(4) Canadian Abraxas owns working interests ranging from 70% to 100% in 4 wells.
(5) Canadian Abraxas owns interest of 100% in 2 wells.
(6) Canadian  Abraxas owns working interest ranging from 50% to 100% in 8 wells.
(7) Canadian Abraxas owns working interest ranging from 21% to 100% in 94 wells.
(8) Consist of Big Bend, Kbnopcik, Eaglesham, Giroux Lake and minor properties.

         Natural  Gas  Processing.  Canadian  Abraxas'  natural  gas  processing
business includes natural gas gathering and processing  operations.  Natural gas
gathering  operations  involve locating and contracting for natural gas supplies
produced from crude oil and natural gas fields and the operation and maintenance
of a gathering  system of pipelines that connect such natural gas supply sources
to natural gas processing  plants.  Natural gas processing  involves  subjecting
natural  gas to high  pressure  and low  temperature  treatments  that cause the
natural  gas to  separate  into  various  products,  including a mixture of NGLs
(commonly referred to as raw product), residual natural gas and by-products such
as helium,  condensate and sulfur.  The combined  value of the residual  natural
gas, raw product and  by-products  is generally  higher than that of unprocessed
natural  gas.  Certain of Canadian  Abraxas'  processing  plants are equipped to
fractionate  the raw product  into its  component  products of ethane,  propane,
butanes and natural gasoline for sale to local markets.

         The Company  believes  that the  Canadian  Abraxas  Plants will provide
substantial  revenue-enhancing  opportunities  to the  Company.  Several  of the
plants are located in areas with little or no competition from other natural gas
processing plants. The Company intends to utilize the plants' excess capacity by
seeking to process  additional  natural gas volumes from third  parties and from
increased production from the Canadian Abraxas Properties.  The Company believes
that its ownership of the Canadian  Abraxas  Properties and the Canadian Abraxas
Plants will afford it a competitive  advantage  relative to other area operators
due to the Company's  preferential access to the natural gas processing capacity
at these facilities.


                                       73
<PAGE>


         The following table sets forth certain  information with respect to the
Canadian Abraxas Plants for the nine months ended September 30, 1997.

                                              Gross                Net
                                             Plant              Plant
                              Working       Capacity            Capacity
Plant Location               Interest        (MMcfpd)           (MMcfpd)
- --------------               --------        --------           --------
Quirk Creek                      21%             80                16.8
Knopcik (1)                      10%             56                 5.6
Valhalla                        100%             30                30.0
Sundre                           23%             20                 4.6
Bellis (2)                       49%             44                21.7
Big Bend                         77%              8                 6.2
Pouce Coupe                     100%              8                 8.0
Eaglesham                        25%              5                 1.3
                                         ===========        ============
     Total                                      251                94.2
                                         ===========        ============

(1)  Consists of three plants.
(2)  Consists of eight plants.

Exploration Opportunities

         The Company  allocates a portion of its capital  budget to the drilling
of exploratory  wells which have high reserve  potential.  The Company  believes
that by devoting a relatively small amount of capital to high impact,  high risk
projects while  reserving the majority of its available  capital for development
projects,  it can  reduce  its risk  profile  while  still  benefiting  from the
potential for  significant  reserve  additions.  Some of the  Company's  current
exploration opportunities include the following:

South Texas

         Muy Bueno Prospect Area, Goliad County, Texas. The W.W. Pettus Heirs #1
in Goliad  County,  Texas was drilled to a total depth of 10,150 feet and logged
at 110 feet of net pay from ten zones  between 8,500 feet and 10,100 feet in the
Wilcox  formation.  The well was  completed in one zone between  depths of 9,788
feet and 9,808 feet and following  perforation  initially  flowed to sales at an
average of 4.1 million  cubic feet of gas per day and 120 barrels of  condensate
per day. The Company is planning to dually  complete the well in another zone in
the near future.

         Abraxas is currently  completing a second  exploratory well, the Ramsey
#1, on its South Big Oak prospect  which  adjoins the  discovery  acreage to the
southwest.  Together  with a  third  prospective  area,  the  Southwest  Big Oak
prospect,  Abraxas  operates with a 90% working interest in all three prospects,
covering 2,890 acres.

         During 1998,  the Company plans also to drill several  shallow wells to
develop  existing  Miocene  gas  sands  and to drill a deeper  test to the Lower
Wilcox.

         Live Bee  Prospect,  Live Oak  County,  Texas . The Schultz #2H well in
Live Oak County initially flowed at an average rate of 4.1 million cubic feet of
gas per day.  Production from the  horizontally  drilled well is from dual 1,500
feet lateral sections, completed open hole, in the Edwards Reef Trend, which was
encountered at a true vertical depth of  approximately  13,120 feet. The Company
plans to drill four additional wells on the prospect during 1998. Abraxas is the
operator and owns a 100% working interest in the 3,400 acre prospect.


                                       74
<PAGE>


Canada

         Ten Mile Island Prospect, NWT, Canada In May 1997, the Company, and its
consolidated  Canadian  subsidiaries,  acquired 116,000 exploratory acres in the
Northwest  Territories  of Canada for a work  commitment  of $2.2  million  This
acreage  adjoins the Norman Wells Field,  currently  the largest  producing  oil
field in Canada, with average daily production of 30,000 barrels of oil per day.
A seismic survey is expected to begin this winter with first  drilling  expected
in the winter of 1998-1999.

         Cranberry/Chinchaga  Area, Alberta, Canada. A total of 53 sections have
been leased to date in the  Cranberry  area of  northern  Alberta  Canada  where
Abraxas and Fina Canada have a 50/50  exploratory  venture  with an AMI covering
150 townships (5,400 square miles).  Five initial prospects have been identified
and seismic  activity  is  expected  to begin this  winter  with first  drilling
expected in the winter of 1998-1999.  Producing  Slave Point Reef Fields in that
area have  estimated  reserves as high as 400  billion  cubic feet of gas and 15
million barrels of oil.

Exploratory and Developmental Acreage

         Abraxas'  principal  crude oil and  natural gas  properties  consist of
non-producing and producing crude oil and natural gas leases, including reserves
of crude oil and natural gas in place.  The following table  indicates  Abraxas'
interest in developed and undeveloped acreage as of December 1, 1997:
<TABLE>
<CAPTION>

                                                                  Developed and Undeveloped Acreage
                                                                        As of December 1, 1997

                                        Developed Acreage                   Undeveloped Acreage
                                 ---------------------------------   -----------------------------------
                                  Gross Acres        Net Acres       Gross Acres          Net Acres
                                 ---------------   ---------------  ---------------   ------------------
<S>                                     <C>                <C>             <C>               <C>    
  Canada                                201,951            84,486          600,155           274,352
  Texas                                  41,074`           24,456           15,693            11,353
  N. Dakota                               1,864             1,021               --                --
  Montana                                   320                10               --                --
  Kansas                                    640               142               --                --
  Wyoming                                 5,239             3,620           14,020             9,476
  Alabama                                   720                23               --                --
                                 ---------------   ---------------  ---------------   ------------------
           Total                        251,808           113,758          629,868           295,181

</TABLE>
                                       75
<PAGE>


Productive Wells

         The following table sets forth the total gross and net productive wells
of Abraxas,  expressed  separately for crude oil and natural gas, as of December
1, 1997:
<TABLE>
<CAPTION>

                                                                           Productive Wells
                                                                        As of December 1, 1997

           State/Country                       Crude Oil                          Natural Gas
                                    --------------------------------   ----------------------------------
                                        Gross             Net              Gross              Net
           ---------------------    ---------------   --------------   ---------------   ----------------
<S>                                       <C>               <C>              <C>               <C> 
           Canada                          44.0              11.5            143.0              64.3
           Texas                          331.0             188.0            104.0              66.4
           N. Dakota                        4.0               1.7               -                 -
           Montana                          1.0               0.1               -                 -
           New Mexico                        -                 -               1.0               0.1
           Wyoming                          3.0               0.2             43.0              30.0
           Alabama                          2.0               0.1              1.0               0.1
           Kansas                           4.0               0.9               -                 -
                                    ===============   ==============   ===============   ================
                    Total                 389.0             202.5            292.0             160.9
                                    ===============   ==============   ===============   ================
</TABLE>

         Substantially  all of the  Company's  U.S.  crude oil and  natural  gas
properties  on a pro  forma  basis  will be  pledged  to  secure  the  Company's
indebtedness under the New Credit Facility. See "Abraxas Management's Discussion
of  Financial  Condition  and Results of  Operations  --  Liquidity  and Capital
Resources."

Reserves Information

         The crude oil and natural gas reserves of Abraxas  have been  estimated
as of December 31, 1994,  December 31, 1995 and December 31, 1996, by DeGolyer &
MacNaughton,  Dallas,  Texas.  Crude  oil  and  natural  gas  reserves,  and the
estimates of the present value of future net revenue therefrom,  were determined
based on then  current  prices  and costs.  Reserve  calculations  involved  the
estimate of future net recoverable reserves of crude oil and natural gas and the
timing and amount of future net revenue to be received therefrom. Such estimates
are not  precise  and are based on  assumptions  regarding a variety of factors,
many of which are variable and uncertain.


                                       76
<PAGE>


         The following table sets forth certain information  regarding estimates
of the  Company's  crude oil,  NGLs and natural gas  reserves as of December 31,
1994, December 31, 1995 and December 31, 1996, on a historical basis:

                                            Estimated Proved Reserves
                                   ---------------------------------------
                                     Proved        Proved           Total
                                    Developed    Undeveloped       Proved
                                   ----------    -----------    ----------

     As of December 31, 1994
       Crude oil (MBbls)              3,617          3,033         6,649
       NGLs (MBbls)                   2,089            418         2,507
       Natural gas (MMcf)            48,973         18,606        67,579

     As of December 31, 1995
       Crude oil (MBbls)              3,992          1,516         5,508
       NGLs (MBbls)                   2,007            752         2,759
       Natural gas (MMcf)            44,026         10,543        54,569

     As of December 31, 1996
       Crude oil (MBbls)              7,871          1,930         9,801(1)
       NGLs (MBbls)                   7,090          1,144         8,234
       Natural gas (MMcf)           157,660         19,600       177,260


(1) Includes  120,400  barrels of crude oil  reserves  owned by Cascade of which
57,600 barrels are applicable to the minority interest's share of the reserves.

         There are numerous  uncertainties  inherent in estimating quantities of
proved  reserves and in projecting  future rates of production and the timing of
development  expenditures,  including  many  factors  beyond the  control of the
Company. The reserve data included in this Proxy Statement-Prospectus  represent
only  estimates.  In addition,  the  estimates of future net revenue from proved
reserves of the Company and the  present  value  thereof are based upon  certain
assumptions about future production levels, prices, and costs that may not prove
to be correct over time. In  particular,  estimates of crude oil and natural gas
reserves,  future net revenue from proved reserves and the PV-10 thereof for the
Company's  crude  oil  and  natural  gas  properties   included  in  this  Proxy
Statement-Prospectus  are based on the assumption that future oil and gas prices
remain the same as crude oil and natural gas prices at December 31,  1996,  with
respect to the Company's then existing  properties.  The average sales prices as
of such dates used for purposes of such  estimates  were $23.19 per Bbl of crude
oil,  $16.31 per Bbl of NGLs and $2.96 per Mcf of natural  gas.  Also assumed is
the Company's making future capital  expenditures of approximately $23.1 million
in the aggregate,  necessary to develop and realize the value of its undeveloped
reserves.  Any significant variance in these assumptions could materially affect
the  estimated  quantity  and  value of  reserves  set forth  herein.  See "Risk
Factors"  and  "Abraxas  Management's   Discussion  and  Analysis  of  Financial
Condition and Results of Operations."

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

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


                                       77
<PAGE>


Crude Oil, NGLs and Natural Gas Production and Sales Prices

         The  following  table  presents  the net  crude  oil,  net NGLs and net
natural gas production for the Company, the average sales price per Bbl of crude
oil and NGLs and per Mcf of natural gas  produced and the average LOE per BOE of
production  sold,  for each of the three years ended  December  31, 1996 and the
nine months ended September 30, 1997:

                                                                      September
                                                                         30,
                                 1994         1995        1996          1997
                              ------------ ----------- -----------   ----------

     Production
       Crude oil (MBbls)           355.7        401.4       425.2         712.2
       NGLs (MBbls)                113.2        143.4       299.5         750.9
       Natural gas (MMcf)        2,392.9      3,552.7     6,350.1      14,984.9

     Average sales price
       Crude oil (per Bbl)      $  15.47     $  17.16    $  20.85      $  18.79
       NGLs (per Bbl)           $  10.54     $  10.83    $  14.55      $  10.63
       Natural gas (per Mcf)    $   1.85     $   1.47    $   1.97      $   1.71

     LOE (per BOE) (1)          $   4.26     $   3.81    $   3.28      $   2.68

(1) Crude oil and natural gas were combined by converting  natural gas to BOE on
the basis of 6 Mcf natural gas -- 1 Bbl of crude oil.

Drilling Activities

         The  following  table sets forth the  Company's  gross and net  working
interests in exploratory, development, and service wells drilled during the year
ended December 31, 1996, and the nine months ended September 30, 1997:

                                     1996         1997 (through September 30)
                            --------------------  ---------------------------
                                 Gross    Net       Gross           Net
                            --------------------  ----------- ---------------
     Exploratory
       Productive
         Crude oil                 2.0     1.2        -             -
         Natural gas               2.0     1.2        4.0           3.2
       Dry holes                   4.0     1.4        2.0           1.8
                            ----------- --------  ----------- ---------------
           Total                   8.0     3.8        6.0           5.0
                            =========== ========  =========== ===============
     Development
       Productive
         Crude oil                20.0    15.8       25.0          22.4
         Natural gas              10.0     3.7       14.0          10.6
       Service                     -       1.0
       Dry holes                   1.0     -          1.0           1.0
                            ----------- --------  ----------- ---------------
           Total                  31.0    20.5       40.0          34.0
                            =========== ========  =========== ===============

Markets and Customers

         The revenue generated by the Company's  operations are highly dependent
upon the prices of, and demand for crude oil and natural gas. Historically,  the
markets  for crude oil and  natural  gas have been  volatile  and are  likely to
continue to be volatile  in the future.  The prices  received by the Company for
its crude oil and natural gas  production  and the level of such  production are
subject to wide fluctuations and depend on numerous factors beyond the Company's
control  including  seasonality,  the  condition  of the United  States  economy
(particularly the manufacturing sector),  foreign imports,  political conditions
in other oil-producing and natural gas-producing  countries,  the actions of the
Organization  of  Petroleum   Exporting   Countries  and  domestic   regulation,

                                       78

<PAGE>

legislation  and policies.  Decreases in the prices of crude oil and natural gas
have had, and could have in the future,  an adverse effect on the carrying value
of the Company's proved reserves and the Company's  revenue,  profitability  and
cash flow from operations.

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

         In connection  with the Acco Sale,  Acco entered into a commodity price
hedge with  Christiania  which was assumed by the Company in connection with the
consummation of the  acquisition of Portilla and Happy.  Under the terms of this
commodity  price  hedge,  the Company is required to receive or make  payment to
Christiania based on a differential between a fixed and variable price for crude
oil and natural gas through the last  business  day of November  2001 on volumes
ranging from 8,160 barrels of crude oil to 20,000 barrels of crude oil per month
and 14,850 MMBTU of natural gas to 87,406 MMBTU of natural gas per month.  Under
this agreement, the Company receives fixed prices ranging from $17.20 per barrel
of crude oil to $18.55  per  barrel of crude oil and $1.793 per MMBTU of natural
gas to $1.925 per MMBTU of natural gas and makes payments based on the price for
west Texas intermediate light sweet crude oil on the NYMEX for crude oil and the
Inside FERC, Tennessee Gas Pipeline Co: Texas (Zone 0) price for natural gas.

         Substantially all of the Company's crude oil and natural gas is sold at
current  market  prices  under  short term  contracts,  as is  customary  in the
industry.  During the year ended December 31, 1996, six purchasers accounted for
approximately  61% of the Company's crude oil and natural gas sales. The Company
believes  that there are  numerous  other  companies  available  to purchase the
Company's  crude  oil and  natural  gas and that the loss of any or all of these
purchasers would not materially  affect the Company's  ability to sell crude oil
and natural gas.

         The Company believes that expected  improvements in the  transportation
infrastructure in, and increased demand for natural gas from,  southwest Wyoming
and Alberta,  Canada will help to reduce the existence of basis differentials in
the pricing of natural gas produced in these areas. With basis  differentials at
relatively  high  historical  levels,  the Company  believes  that the  Canadian
Abraxas  Properties and the Wyoming Properties have the potential for increasing
revenue and asset value as these differentials  decrease without any increase in
LOE and G&A expenses.

Competition

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

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

                                       79

<PAGE>

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

Regulatory Matters

         The  Company's  operations  are  affected  from time to time in varying
degrees by political developments and federal,  state, provincial and local laws
and regulations.  In particular, oil and gas production operations and economics
are, or in the past have been, affected by price controls, taxes,  conservation,
safety,  environmental,  and other laws relating to the petroleum  industry,  by
changes in such laws and by constantly changing administrative regulations.

         Price Regulations

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

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

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

         The North American Free Trade Agreement

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

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


                                       80
<PAGE>


         Natural Gas Regulation

         Historically,   interstate   pipeline  companies   generally  acted  as
wholesale  merchants by purchasing  natural gas from producers and reselling the
gas to local  distribution  companies  and large end users.  Commencing  in late
1985, the Federal Energy  Regulatory  Commission (the "FERC") issued a series of
orders  that  have  had a  major  impact  on  interstate  natural  gas  pipeline
operations,  services,  and  rates,  and thus  have  significantly  altered  the
marketing and price of natural gas. The FERC's key rule making action, order No.
636 ("Order 636"),  issued in April 1992,  required each interstate pipeline to,
among other things, "unbundle" its traditional bundled sales services and create
and make available on an open and  nondiscriminatory  basis numerous constituent
services (such as gathering services,  storage services,  firm and interruptible
transportation  services, and standby sales and gas balancing services),  and to
adopt a new  ratemaking  methodology  to determine  appropriate  rates for those
services.  To the  extent the  pipeline  company  or its sales  affiliate  makes
natural gas sales as a merchant,  it does so  pursuant to private  contracts  in
direct  competition  with  all of the  sellers,  such as the  Company;  however,
pipeline  companies and their affiliates were not required to remain "merchants"
of natural  gas,  and most of the  interstate  pipeline  companies  have  become
"transporters  only." In subsequent  orders, the FERC largely affirmed the major
features of Order 636 and denied a stay of the  implementation  of the new rules
pending  judicial  review.  By the end of 1994, the FERC had concluded the Order
636  restructuring   proceedings,   and,  in  general,   accepted  rate  filings
implementing Order 636 on every major interstate pipeline. However, even through
the  implementation  of  Order  636  on  individual   interstate   pipelines  is
essentially complete, many of the individual pipeline restructuring  proceedings
are  subject to pending  appellate  review  and could  possibly  be changed as a
result of future court orders.  The Company  cannot  predict  whether the FERC's
orders will be affirmed on appeal or what the effects will be on its business.

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

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

                                       81

<PAGE>

facilities,  but also to seek authority  under Section 4 of the NGA to terminate
service from both certificated and  uncertificated  facilities.  On December 31,
1994, an appeal was filed with the U.S. Court of Appeals for the D.C. Circuit to
overturn  three of the FERC's  November 30,  1994,  orders.  The Company  cannot
predict what the ultimate  effect of the FERC's  orders  pertaining to gathering
will have on its production and marketing,  or whether the Appellate  Court will
affirm the FERC's orders on these matters.

         State and Other Regulation

         All of the  jurisdictions in which the Company owns producing crude oil
and natural gas properties have statutory provisions  regulating the exploration
for and production of crude oil and natural gas, including  provisions requiring
permits for the drilling of wells and maintaining bonding  requirements in order
to drill or operate wells and provisions  relating to the location of wells, the
method of  drilling  and  casing  wells,  the  surface  use and  restoration  of
properties  upon which wells are  drilled and the  plugging  and  abandoning  of
wells. The Company's  operations are also subject to various  conservation  laws
and  regulations.  These  include the  regulation  of the size of  drilling  and
spacing  units or proration  units and the density of wells which may be drilled
and the unitization or pooling of crude oil and natural gas properties.  In this
regard,  some  states  allow the  forced  pooling  or  integration  of tracts to
facilitate exploration while other states rely on voluntary pooling of lands and
leases.  In  addition,  state  conservation  laws  establish  maximum  rates  of
production from crude oil and natural gas wells,  generally prohibit the venting
or  flaring  of  natural  gas and  impose  certain  requirements  regarding  the
ratability of  production.  Some states,  such as Texas and  Oklahoma,  have, in
recent years, reviewed and substantially revised methods previously used to make
monthly  determinations  of  allowable  rates  of  production  from  fields  and
individual  wells.  The effect of these  regulations  is to limit the amounts of
crude oil and natural gas the Company can produce  from its wells,  and to limit
the number of wells or the location at which the Company can drill.

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

         Royalty Matters

         United States

         By a letter  dated May 3, 1993,  directed  to  thousands  of  producers
holding  interests  in federal  leases,  the  United  States  Department  of the
Interior (the "DOI") announced its  interpretation of existing federal leases to
require the payment of royalties on past natural gas contract  settlements which
were  entered  into in the 1980s  and  1990s to  resolve,  among  other  things,
take-or-pay  and minimum take claims by producers  against  pipelines  and other
buyers.  The DOI's letter sets forth various theories of liability,  all founded
on the DOI's  interpretation  of the term  "gross  proceeds"  as used in federal
leases and pertinent federal  regulations.  In an effort to ascertain the amount
of such  potential  royalties,  the DOI sent a letter to  producers  on June 18,
1993,  requiring  producers  to provide  all data on all  natural  gas  contract
settlements, regardless of whether natural gas produced from federal leases were
involved  in the  settlement.  The Company  received a copy of this  information
demand letter. In response to the DOI's action,  in July 1993,  various industry
associations  and others filed suit in the United States  District Court for the
Northern  District  of West  Virginia  seeking  an  injunction  to  prevent  the
collection  of royalties on natural gas contract  settlement  amounts  under the
DOI's  theories.  The lawsuit,  styled  "Independent  Petroleum  Association  v.
Babbitt," was  transferred  to the United States  District  Court in Washington,
D.C.  On June 4,  1995,  the Court  issued a ruling in this  case  holding  that
royalties  are payable to the United  States on natural gas contract  settlement
proceeds in  accordance  with the  Minerals  Management  Service's  May 3, 1993,
letter to  producers.  This ruling was  appealed  and is now pending in the D.C.
Circuit Court of Appeals.  The DOI's claim in a bankruptcy  proceeding against a
producer based upon an interstate  pipeline's  earlier buy-out of the producer's
natural  gas sale  contract  was  rejected by the  Federal  Bankruptcy  Court in
Lexington,  Kentucky, in a proceeding styled "Century Offshore Management Corp."
While  the  facts  of the  Court's  decision  do not  involve  all of the  DOI's
theories, the Court found on those at issue that the DOI's theories were without
legal merit, and the Court's reasoning  suggests that the DOI's other claims are
similarly  deficient.  This decision was upheld in the District Court and is now
on appeal in the Sixth Circuit Court of Appeals.  Because both the  "Independent
Petroleum  Association  v.  Babbitt" and  "Century  Offshore  Management  Corp."
decisions  have  been  appealed,  and  because  of  the  complex  nature  of the
calculations necessary to determine potential additional royalty liability under

                                       82
<PAGE>

the DOI's  theories,  it is impossible  to predict  what, if any,  additional or
different  royalty  obligation  the DOI may assert or  ultimately be entitled to
recover  with  respect  to any of  the  Company's  prior  natural  gas  contract
settlements.

         Canada

         In  addition  to  Canadian  federal   regulation,   each  province  has
legislation  and  regulations  that govern land  tenure,  royalties,  production
rates,  environmental  protection  and other  matters.  The royalty  regime is a
significant factor in the profitability of crude oil and natural gas production.
Royalties payable on production from lands other than Crown lands are determined
by  negotiations  between the mineral owner and the lessee.  Crown royalties are
determined  by  governmental  regulation  and  are  generally  calculated  as  a
percentage  of the  value of the  gross  production,  and the rate of  royalties
payable  generally  depends  in  part  on  prescribed  preference  prices,  well
productivity,  geographical  location,  field  discovery  date  and the type and
quality of the petroleum product produced.

         From time to time the governments of Canada,  Alberta and  Saskatchewan
have established incentive programs which have included royalty rate reductions,
royalty  holidays and tax credits for the purpose of  encouraging  crude oil and
natural gas exploration or enhanced planning projects.

         Regulations  made  pursuant  to the Mines and  Minerals  Act  (Alberta)
provide  various  incentives for exploring and developing  crude oil reserves in
Alberta.  Crude oil produced from qualifying development wells that were spudded
on or after  November 1, 1991, and prior to August 1, 1993 (or spudded in August
but licensed prior thereto) are eligible for a 12-month royalty  exemption up to
a maximum of C$400,000.  Exploration  wells spudded on or after November 1, 1991
and prior to April 1, 1992,  or if drilled in northern  Alberta or the Foothills
area of Alberta prior to April 1, 1993, are entitled to a 24-month  exemption to
a maximum of C$1.0  million.  A 24-month  royalty  reduction (up to December 31,
1996) is available for crude oil produced from qualifying  horizontal extensions
commenced  prior  to  January  1,  1995.  Crude  oil  produced  from  horizontal
extensions  commenced at least five years after the well was originally  spudded
may also qualify for a royalty  reduction.  Wells  drilled prior to September 1,
1990, and reactivated  between November 1, 1991 and October 1, 1992,  having had
no production  between September 1, 1990 and November 1, 1991, are entitled to a
five year royalty  exemption to a maximum of 4,000 cubic metres.  An 8,000 cubic
metres  exemption is available to  production  from a well that has not produced
for a 12-month period, if resuming  production in October,  November or December
of 1992 or January  of 1993,  or for a 24-month  period if  resuming  production
after  January 31, 1993.  In addition,  crude oil  production  from eligible new
field and new pool wildcat  wells and deeper pool test wells spudded or deepened
after  September  30, 1992,  is entitled to a 12-month  royalty  exemption (to a
maximum of $1 million). Crude oil produced from low productivity wells, enhanced
recovery  schemes (such as injection  wells) and  experimental  projects is also
subject to royalty reductions.

         The Alberta  government  also  introduced the Third Tier Royalty with a
base rate of 10% and a rate cap of 25% from oil pools discovered after September
30, 1992. The new oil royalty reserved to the Crown has a base rate of 10% and a
rate cap of 30% and for old oil a base rate of 10% and a rate cap of 35%.

         Effective  January 1, 1994, the  calculation and payment of natural gas
royalties  became subject to a simplified  process.  The royalty reserved to the
Crown, subject to various incentives,  is between 15% or 30%, in the case of new
natural gas, and between 15% and 35%, in the case of old natural gas,  depending
upon a prescribed or corporate  average  reference  price.  Natural gas produced
from qualifying exploratory gas wells spudded or deepened after July 1, 1985 and
before June 1, 1988  continues  to be  eligible  for a royalty  exemption  for a
period of 12 months,  or such later time that the value of the exempted  royalty
quantity  equals  a  prescribed  maximum  amount.   Natural  gas  produced  from
qualifying  intervals  in eligible  natural  gas wells  spudded or deepened to a
depth below 2,500 meters is also subject to a royalty  exemption,  the amount of
which depends on the depth of the well.

         In  Alberta,  a producer  of crude oil or natural  gas is  entitled  to
credit  against  the  royalties  payable  to the Crown by virtue of the  Alberta
Royalty  Tax  Credit  ("ARTC")   program.   The  ARTC  program  is  based  on  a
price-sensitive  formula,  and the ARTC rate  currently  varies  between 75% for
prices  for crude oil at or below  CDN $100 per cubic  metre and 35% for  prices

                                       83
<PAGE>

above CDN $210 per cubic metre. The ARTC rate is currently  applied to a maximum
of CDN $2.0  million of Alberta  Crown  royalties  payable for each  producer or
associated  group of producers.  Crown  royalties on production  from  producing
properties acquired from corporations  claiming maximum entitlement to ARTC will
generally not be eligible for ARTC. The rate is established  quarterly  based on
average "par price",  as determined by the Alberta  Department of Energy for the
previous quarterly period.

         Crude oil and natural gas royalty  holidays and reductions for specific
wells reduce the amount of Crown  royalties paid to the provincial  governments.
The ARTC  program  provides  a rebate  on Crown  royalties  paid in  respect  of
eligible producing properties.

         The  Government of  Saskatchewan  revised its fiscal regime for the oil
and gas industry  effective January 1, 1994. Some royalties on wells existing as
of that date will remain  unchanged and therefore  subject to various periods of
royalty/tax  reduction.  While a number of incentives were eliminated or reduced
(such as incentives for vertical infill wells and lower cost horizontal  wells),
new  incentive  programs were  initiated to encourage  greater  exploration  and
development  activity  in the  province.  The  new  fiscal  regime  provides  an
incentive to encourage  the drilling of new vertical oil wells through a revised
royalty/tax structure for new vertical oil wells and incremental production from
new or expanded  water flood  projects.  This "third tier" Crown royalty rate is
price  sensitive  and varies  between heavy and non-heavy oil (from a minimum of
10% for heavy oil at a base  price to a maximum  of 35% for  non-heavy  oil at a
price above the base price). Previous time-based royalty/tax holidays applicable
to vertically drilled oil wells have been replaced with volume-based royalty/tax
reduction  incentives  in which a maximum  royalty  of 5% will  apply to various
volumes depending on the depth and nature of the well (up to 25,000 cubic metres
of oil in the case of deep exploratory wells). The maximum royalty applicable to
the  first  12,000  cubic  metres of oil has been  increased  from 5% to 10% for
production from certain horizontal wells. In addition,  royalty/tax holidays for
deep  horizontal  oil wells have been replaced with a 25,000 cubic metres volume
incentive (5% maximum royalty).  Oil production from qualifying  reactivated oil
wells are subject to a maximum  new royalty  rate of 5% for the first five years
following  re-activation in the case of wells reactivated after 1993 and shut-in
or suspended  prior to January 1, 1993.  With respect to qualifying  exploratory
natural gas wells,  the first 25 million  cubic  metres of natural gas  produced
will be subject to an incentive maximum royalty rate of 5%.

         Environmental Matters

         The Company's  operations are subject to numerous  federal,  state, and
local laws and  regulations  controlling  the  discharge of  materials  into the
environment  or  otherwise  relating  to  the  protection  of  the  environment,
including the Comprehensive  Environment Response,  Compensation,  and Liability
Act  ("CERCLA"),  also  known as the  "Federal  Superfund  Law."  Such  laws and
regulations, among other things, impose absolute liability upon the lessee under
a lease  for  the  cost of  clean  up of  pollution  resulting  from a  lessee's
operations,  subject the lessee to liability for pollution damages,  may require
suspension or cessation of operations in affected areas, and impose restrictions
on the  injection  of liquids  into  subsurface  aquifers  that may  contaminate
groundwater.   The  Company  maintains   insurance  against  costs  of  clean-up
operations,  but it's not  fully  insured  against  all such  risks.  A  serious
incident  of  pollution  may,  as it has in the  past,  also  result  in the DOI
requiring  lessees  under  federal  leases to suspend or cease  operation in the
affected  area.  In  addition,  the recent trend  toward  stricter  standards in
environmental legislation and regulation may continue. For instance, legislation
has been  proposed in Congress from time to time that would  reclassify  certain
crude oil and natural gas  production  wastes as "hazardous  wastes" which would
make the  reclassified  exploration  and production  wastes subject to much more
stringent  handling,  disposal,  and clean up requirements.  If such legislation
were  to be  enacted,  it  could  have a  significant  impact  on the  Company's
operating  costs,  as well as the crude oil and natural gas industry in general.
State  initiatives to further regulate the disposal of crude oil and natural gas
wastes are also pending in certain states,  and these various matters could have
a similar impact on the Company.

         The Company's  Canadian  operations  are also subject to  environmental
regulation  pursuant  to local,  provincial  and federal  legislation.  Canadian
environmental legislation provides for restrictions and prohibitions on releases
or emissions of various  substances  produced in association  with certain crude
oil and natural gas industry operations and can affect the location of wells and
facilities and the extent to which exploration and development is permitted.  In
addition,  legislation  requires that well and facilities sites be abandoned and

                                       84
<PAGE>

reclaimed  to the  satisfaction  of  provincial  authorities.  A breach  of such
legislation  may  result in the  imposition  of fines or  issuance  of  clean-up
orders.  Environmental legislation in Alberta has undergone a major revision and
has been  consolidated in the  Environmental  and Enhancement Act. Under the new
Act, environmental standards and compliance for releases, clean-up and reporting
are stricter.  Also, the range of enforcement actions available and the severity
of  penalties  have  been  significantly  increased.  These  changes  will  have
incremental effect on the cost of conducting operations in Alberta.

         The Company is not currently involved in any administrative or judicial
proceedings  arising  under  domestic  or  foreign  federal,   state,  or  local
environmental  protection  laws and  regulations  which  would  have a  material
adverse effect on the Company's financial position or results of operations.

Title to Properties

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

Employees

         As of January 1, 1998,  Abraxas had 55 full-time  employees,  including
two executive officers,  four non-executive  officers, five petroleum engineers,
one landman,  four managers,  thirteen secretarial and clerical personnel and 26
field   personnel.   Additionally,   Abraxas  retains   contract  pumpers  on  a
month-to-month  basis. The Company retains independent  geologic and engineering
consultants  from time to time on a limited  basis and expects to continue to do
so in the future.

         The  Company's  Canadian  subsidiary,  as of November 30, 1997,  had 18
full-time  employees,  including three  executive  officers,  one  non-executive
officer, one manager, one petroleum engineer,  one geologist,  seven secretarial
and clerical personnel and four field personnel.

Office Facilities

         The Company's  executive and administrative  offices are located at 500
North Loop 1604 East,  Suite 100, San Antonio,  Texas 78232.  The Company owns a
16%  limited  partnership  interest  in the  partnership  which owns this office
building.  The Company  also has an office in  Midland,  Texas.  These  offices,
consisting  of  approximately  12,650  square feet in San Antonio and 960 square
feet in Midland, are leased until March 2005 at an aggregate rate of $14,194 per
month.

Other Properties

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


                                       85
<PAGE>


Litigation

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

                                       86
<PAGE>


                               BUSINESS OF VESSELS

General

         Vessels is an independent  energy company  engaged in the  acquisition,
exploration, development, production and gathering of natural gas and crude oil.
From its  predecessor's  inception  in the  1970's  until  the  spring  of 1997,
Vessels' core operations were in the DJ Basin in northeast  Colorado.  Beginning
in 1993,  Vessels began to slowly  diversify its production  base outside the DJ
Basin by the selective acquisition of mineral leases and producing properties in
other  Rocky  Mountain  basins.  Because  of the growth  potential  of its other
properties and a more favorable acquisition market outside the DJ Basin, Vessels
elected,  in late 1996, to sell its DJ Basin Properties and focus its efforts on
higher  potential  growth  opportunities   elsewhere.  In  April  1997,  Vessels
completed the sale for cash of its DJ Basin producing, gathering, processing and
marketing business.  Sales proceeds were used to extinguish Vessels' debt to its
lenders at such time and fund an  aggressive  1997 capital  expenditure  program
primarily focused on drilling in western Colorado.

         Vessels owns interest in 73 producing  wells and 159,600 gross (139,000
net)  acres of mineral  leases.  Vessels  operates  all wells in which it has an
interest, as well as 100 miles of gas gathering pipelines.

         Vessels employs 27 persons full-time. Its principal offices are located
in  Suite  2000,  1050  Seventeenth  Street,  Denver,  Colorado  80265,  and its
telephone number is (303) 825-3500.

Primary Operating Areas

Western Colorado

         In 1994,  Vessels  acquired  an 80%  interest  in  20,000  acres on the
eastern flank of the Piceance  Basin,  including 5 producing  wells. In 1994 and
1995,  Vessels drilled 2 and 3 wells,  respectively,  on this acreage.  Based on
drilling results and plans to accelerate  drilling,  Vessels began acquiring the
balance of outstanding  interests,  as well as leasing additional mineral rights
in the area. In 1996 and 1997, Vessels drilled 10 and 16 wells, respectively, in
this area.

         There are now 33 wells on Vessels'  acreage in which Vessels owns a 99%
working  interest.  Net production in October 1997 averaged 8,638 Mcf of gas per
day and 61 BOPD of condensate.

Southwestern Wyoming

         In 1993,  Vessels  acquired  an  interest in 6,500 acres on the eastern
flank of the Washakie/Green River Basin,  including 12 producing wells. In 1996,
Vessels  initiated the  acquisition  of 17 square miles of 3-D seismic data on a
part of this  acreage.  Based on  drilling  results  targeted in part by the 3-D
seismic  interpretations  and  plans  to  accelerate  drilling,   Vessels  began
acquiring other producing interests as well as leasing additional mineral rights
in the area. In 1997, Vessels drilled 3 wells in this area.

         There are now 40 wells on  Vessels'  acreage  in which  Vessels  owns a
96.8% working interest. Net production in October 1997 averaged 1,757 Mcf of gas
per day and 323 BOPD of condensate.

Exploration Opportunities

         Vessels  utilizes  its  geologic   expertise  to  acquire   substantial
interests in developing exploration prospects with significant reserve potential
with the intent to recover its initial  investment in these prospects by selling
a portion of such  interests  before  outlaying  substantial  risked capital for
drilling and development.  Depending upon the drilling  outcome,  Vessels either
sells its remaining interest, continues to participate in the development of the
prospect,  or, as was done in Western Colorado and Southwestern Wyoming,  begins
to acquire those  interests  not held by Vessels in the prospect or  surrounding
acreage and fields. Currently, Vessels is involved in the following prospects:

                                       87

<PAGE>

         Schuster Flats  Prospect,  Big Horn Basin,  Washakie  County,  Wyoming.
Vessels  controls  long-term  mineral  leases over  approximately  47,000 nearly
contiguous  acres and  certain  geophysical  data over this  area.  Vessels  has
entered into an agreement with another independent oil operator in which Vessels
will  convey 60% of its  interest  in the  acreage  in return  for the  operator
acquiring further geophysical data and drilling two wells in 1998.

         Montana Overthrust  Prospect,  Montana Overthrust Belt, Lewis and Clark
County,  Montana.  Vessels controls  long-term mineral leases over approximately
12,000 acres and certain  geophysical  data over this area.  Other operators are
conducting exploration activities along this trend which is geologically similar
to the highly productive  Foothills trend in Alberta and British  Columbia.  The
Company is in the process of reviewing  geophysical data acquired from others to
determine if further  seismic data  acquisition is appropriate  before  drilling
operations are commenced.  At this time,  Vessels  controls 100% of this acreage
block which appears to overlie more than one drilling prospect.

Exploratory and Development Acreage

         Vessels'  principal  crude oil and  natural gas  properties  consist of
non-producing and producing crude oil and natural gas leases, including reserves
of crude oil and natural gas in place.  The following table  indicates  Vessels'
interest in developed and undeveloped acreage as of December 1, 1997:
<TABLE>
<CAPTION>


                                                                  Developed and Undeveloped Acreage
                                                                        As of December 1, 1997

                                        Developed Acreage                   Undeveloped Acreage
                                 ---------------------------------   -----------------------------------
                                  Gross Acres        Net Acres       Gross Acres          Net Acres
                                 ---------------   ---------------  ---------------   ------------------
<S>                                      <C>               <C>             <C>               <C>   
  Wyoming                                23,695            16,420          103,305            96,580
  Montana                                    --`               --           12,600            11,600
  Colorado                               14,750            14,750            5,250             2,360
                                 ---------------   ---------------  ---------------   ------------------
           Total                         38,445            31,170          121,155           110,540
</TABLE>

Productive Wells

         The following table sets forth the total gross and net productive wells
of Vessels,  expressed  separately for crude oil and natural gas, as of December
1, 1997:

                              Productive Wells (1)
                             As of December 1, 1997

                                         Crude Oil             Natural Gas
                                    ---------------------  --------------------
            State/Country             Gross      Net        Gross       Net
           ---------------------    ---------- ----------  --------------------
           Colorado                     --        --         33.0       32.9
           Wyoming                      18.0      17.4       22.0       19.0
                                    ========== ==========  ====================
                    Total               18.0      17.4       55.0       51.9
                                    ========== ==========  ====================


Reserves Information

         The crude oil and natural gas reserves of Vessels  have been  estimated
as of  January 1,  1995,  1996 and 1997,  by  Netherland,  Sewell &  Associates,
Dallas,  Texas.  These estimates  included the DJ Basin Properties sold in April
1997. The reserves in the DJ Basin comprised in excess of 65% of the reserves in
each of the aforementioned  years.  Crude oil and natural gas reserves,  and the

                                       88
<PAGE>

estimates of the present value of future net revenue therefrom,  were determined
based on then  current  prices  and costs.  Reserve  calculations  involved  the
estimate of future net recoverable reserves of crude oil and natural gas and the
timing and amount of future net revenue to be received therefrom. Such estimates
are not  precise  and are based on  assumptions  regarding a variety of factors,
many of which are variable and uncertain.

         The following table sets forth certain information  regarding estimates
of Vessels crude oil, and natural gas reserves as of January 1, 1995, January 1,
1996 and January 1, 1997, on a historical basis:

                                      Estimated Proved Reserves (1)
                                   -------------------------------------
                                    Proved        Proved       Total
                                   Developed    Undeveloped    Proved
                                   ----------- -------------- ----------

     As of January 1, 1995
       Crude oil (MBbls)             1,933          2,808       4,741
       Natural gas (MMcf)           37,890         26,226      64,116

     As of January 1, 1996
       Crude oil (MBbls)             1,726          1,642       3,368
       Natural gas (MMcf)           40,458         17,323      59,271

     As of January 1, 1997
       Crude oil (MBbls)             2,024          2,759       4,783
       Natural gas (MMcf)           54,222         42,232      96,454


(1)      Includes reserves related to the DJ Basin Properties.

         There are numerous  uncertainties  inherent in estimating quantities of
proved  reserves and in projecting  future rates of production and the timing of
development expenditures,  including many factors beyond the control of Vessels.
The reserve  data  included in this  Prospectus  represent  only  estimates.  In
addition,  the  estimates of future net revenue from proved  reserves of Vessels
and the present  value thereof are based upon certain  assumptions  about future
production levels, prices, and costs that may not prove to be correct over time.
In  particular,  estimates  of crude oil and  natural gas  reserves,  future net
revenue from proved  reserves and the PV-10  thereof for Vessels'  crude oil and
natural gas properties included in this Proxy  Statement-Prospectus are based on
the  assumption  that future oil and gas prices remain the same as crude oil and
natural gas prices at January 1, 1997,  with respect to Vessels'  then  existing
properties.  The average sales prices as of such dates used for purposes of such
estimates  were  $24.80 per Bbl of crude oil and $3.32 per Mcf of  natural  gas.
Also assumed is Vessels'  making future capital  expenditures  of  approximately
$12.0  million in the  aggregate,  necessary to develop and realize the value of
its undeveloped  reserves.  Any significant  variance in these assumptions could
materially affect the estimated quantity and value of reserves set forth herein.
See  "Risk  Factors"  and  "Vessels  Management's  Discussion  and  Analysis  of
Financial Condition and Results of Operations."

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


                                       89
<PAGE>



Drilling Activities

         The following table sets forth Vessels' gross and net working  interest
in  exploratory,  development  and service  wells  drilled  outside the DJ Basin
during the year ended December 31, 1996 and the nine months ended  September 30,
1997.

                                       1996        1997 (through September 30)
                          ---------------------- ------------------------------
                               Gross      Net        Gross            Net
                          ------------ --------- --------------- --------------
     Exploratory
       Productive
         Crude oil              --        --            --            --
         Natural gas            --        --            --            --
       Dry holes                 2.0       2.0           1.0           1.0
                          ------------ --------- --------------- --------------
           Total                 2.0       2.0           1.0           1.0
                          ============ ========= =============== ==============
     Development
       Productive
         Crude oil               3.0       3.0           1.0           1.0
         Natural gas            15.0      14.6          16.0          15.9
       Dry holes                 5.0       5.0           1.0           1.0
                          ------------ --------- --------------- --------------
           Total                23.0      22.6          18.0          17.9
                          ============ ========= =============== ==============

Markets and Customers

         In order to manage its exposure of price risks in the  marketing of its
crude oil and natural gas, Vessels  continually  reviews  opportunities to enter
into fixed price delivery  contracts,  financial swaps and crude oil and natural
gas  futures  contracts  as hedging  devises  that lock in the value of Vessels'
current assets and the return on Vessels' near-term capital expenditure program.

         Vessels is a party to the Supply  Contract,  which is a long term fixed
price  gas sale  contract  that  expires  in 2008 and  provides  for the sale of
approximately  1.5 Bcf of gas per year. To supply the sale,  Vessels  transports
its gas production  from other points to the point of sale, or when  financially
advantageous,  sells its gas production nearer to the point of production, while
buying  gas from  other  parties  at or near the  point  of sale.  When  Vessels
transports its gas production it utilizes firm transportation capacity for which
it  has  contracted  with  interstate  pipelines  for  terms  approximating  and
quantities  greater  than  those  of the  Supply  Contract  for  "forward  haul"
transportation,  and short-term  interruptible  transportation for "back hauls."
Certain  claims  related  to the  Supply  Contract  are  subject  to the  Escrow
Agreement. See "The Merger - Escrow of Shares."

         The  balance  of  Vessels'  oil and gas  production  is sold at current
market prices under short-term contracts customary in the industry.

         During the nine months ended September 30, 1997, 9 purchasers accounted
for approximately 80% of Vessels' oil and gas sales revenues.


                                       90
<PAGE>


         In addition,  Vessels is a party to financial swaps and collars through
1999,  as  outlined  below,  with either  Chase Bank or Enron  Capital and Trade
Resources.

                                            1998                  1999
                                      --------------          -----------

Annual volume of Oil                     119,000                  _

Range of Settlement Prices, $/BBL     $15.45-$19.00              N/A

Annual Volume of Gas                   2,480,000                840,000

Range of Settlement Prices, $/MMBTU   $1.355-$1.95               $1.83


Competition

         Vessels is subject to  substantially  the same  competitive  factors as
Abraxas. See "Business of Abraxas-- Competition."

Regulatory Matters

         Vessels is  subject to  substantially  the same  regulatory  factors as
Abraxas. See "Business of Abraxas--Regulatory Matters."

         In addition to the regulations to which Abraxas is subject,  Vessels is
subject,  and after the  consummation of the Merger Abraxas will be subject,  to
regulation by the State of Colorado. Colorado amended its statute concerning oil
and  natural  gas  development  in  1994  to  provide  the  state's  Oil and Gas
Conservation  Commission (the "Colorado OGC Commission") with enhanced authority
to regulate oil and gas activities to protect public health, safety and welfare,
including  the  environment.  Several rule makings  pursuant to these  statutory
changes  have  been  undertaken  by  the  Colorado  OGC  Commission   concerning
groundwater  protection,  soil  conservation and site  reclamation,  setbacks in
urban areas and other safety  concerns,  and  financial  assurance  for industry
obligations  in these areas.  To date,  these rule  changes  have not  adversely
affected  operations of Vessels,  as the Colorado OGC  Commission is required to
enact cost-effective and technically feasible regulations. However, there can be
no assurance  that, in the aggregate,  these and other  regulatory  developments
will not increase the cost of conducting operations in the future.

         In Colorado,  a number of city and county  governments have enacted oil
and natural gas regulations.  These ordinances increase the involvement of local
governments  in the  permitting of oil and natural gas  operations,  and require
additional  restrictions  or  conditions  on the conduct of  operations so as to
reduce  their  impact on the  surrounding  community.  Accordingly,  these local
ordinances  have the potential to delay,  and increase the cost of, drilling and
recompletion operations.

Title to Properties

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

                                       91
<PAGE>

industry.  Vessels  does not believe that any of these  encumbrances  or burdens
will materially affect Vessels' ownership or use of its properties.

Employees

         As  of  November  30,  1997,   Vessels  had  27  full-time   employees.
Additionally,  Vessels retains contract  pumpers on a month-to-month  basis. The
Company retains  independent  geologic and engineering  consultants from time to
time on a limited basis and expects to continue to do so in the future.

Office Facilities

         Vessels leases approximately 20,000 square feet of office space at 1050
Seventeenth  Street,  Suite  2000,  Denver,  Colorado  90285  for its  executive
offices. The primary lease term is set to expire in the third quarter of 1998.

Litigation

         Vessels is currently not a defendant in any ongoing litigation.

         The Environmental Protection Agency has issued administrative orders to
certain parties who were former  customers of Weld County Waste  Disposal,  Inc.
("WCWDI")  related  to their  disposal  of waste  at  facilities  owned by WCWDI
(matter of Weld County  Waste  Disposal,  Inc.,  EPA  Dockets No. RCRA  7003VIII
95-02,  95-04).  Those parties have threatened to assert claims against Vessels,
who was also a customer of WCWDI, under a right of contribution  theory but have
not filed a  complaint.  Vessels  is unable to assess  (i)  whether  any  claims
regarding  this matter will be asserted,  (ii) whether any claims,  if asserted,
would be  successful,  or (iii) if any claims  are  successfully  asserted,  the
magnitude and amount of the claims.

         From time to time, Vessels is also involved in various other claims and
administrative  proceedings  arising in the normal  course of  business.  In the
opinion of management,  any  liabilities  that may result from these claims will
not,  individually  or in the  aggregate,  have a  material  adverse  effect  on
Vessels' financial position or results of operations.

         Vessels is presently engaged in voluntary  settlement  discussions with
the owner, operator and two other companies regarding Vessels'  participation in
the  cleanup of the WCWDI Oil Field Waste  Disposal  Facility  near Ft.  Lupton,
Colorado,  in lieu of litigation  over the potential  claims between Vessels and
such other  companies.  Vessels has  recorded an accrual of $300,000  related to
this issue and Vessels' management believes its financial statements  adequately
reflect the impact of a potential settlement.


                                       92
<PAGE>


                     MANAGEMENT OF ABRAXAS AFTER THE MERGER

Directors and Executive Officers

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

Name                         Age       Office                                                             Class

<S>                          <C>       <C>                                                               <C>  
Robert L. G. Watson          47        Chairman of the Board,  President and Chief Executive  Officer of
                                       Abraxas;  Chairman of the Board and director of Cascade; Chairman
                                       of the Board, President and director of Canadian Abraxas
                                                                                                          III
Chris E. Williford           46        Executive Vice President,  Chief Financial Officer, Treasurer and
                                       director of Abraxas;  Vice  President and Assistant  Secretary of
                                       Canadian Abraxas                                                   III
Robert Patterson             40        Vice President/Operations of Abraxas                               -
Stephen T. Wendel            48        Vice President/Land and Marketing of Abraxas                       -
Franklin A. Burke            63        Director of Abraxas                                                I
Harold D. Carter             58        Director of Abraxas                                                I
Robert D. Gershen            44        Director of Abraxas                                                I
Richard M. Kleberg, III      55        Director of Abraxas                                                II
James C. Phelps              75        Director of Abraxas                                                III
Paul A. Powell, Jr.          52        Director of Abraxas                                                II
Richard M. Riggs             77        Director of Abraxas                                                II
Robert F. Semmens*           40        Director of Abraxas
Roger L. Bruton              65        Executive Vice President and director of Cascade;  Executive Vice
                                       President and director of Canadian Abraxas                         -
Donald A. Engle              54        President  and  director of Cascade;  Secretary  and  director of
                                       Canadian Abraxas                                                   -
</TABLE>

*  To be appointed upon consummation of the Merger

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

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

         Robert  Patterson  has served as Vice  President/Operations  of Abraxas
since December 1995. From 1986 to 1995, Mr. Patterson was employed by Parker and
Parsley Petroleum USA most recently as a Gulf Coast Division  Manager.  Prior to

                                       93
<PAGE>

that, Mr.  Patterson was District  Manager for HCW Exploration from 1983 to 1986
and Drilling  Engineer  with  Hilliard  Oil and Gas from 1980 to 1983.  Prior to
that,  he was a Drilling  Engineer  with Texas  Pacific Oil Company from 1979 to
1980. Mr. Patterson is a registered  Professional Engineer in the state of Texas
and graduated  with a Bachelor of Science degree in petroleum  engineering  from
the University of Texas in 1979.

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

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

         Harold D. Carter, a director of Abraxas since May 1996, has served as a
member  of  the   management   committee   of  Brigham  Oil  &  Gas,   L.P.,   a
three-dimensional  seismic exploration  company,  since May 1992. Mr. Carter has
also served as a consultant to Associated  Energy Managers,  Inc., an investment
manager  specializing  in structuring  and managing  private  investments in the
energy  industry,  since  October  1994.  From 1991 to 1992,  Mr.  Carter  was a
consultant  to various  companies  and  investors  involved in the crude oil and
natural  gas  industry.  Prior to 1991,  Mr.  Carter  was  employed  by  Pacific
Enterprises  Oil  Company,  where  he  was an  Executive  Vice  President  until
September 1990 and a consultant  from  September 1990 until December 1990.  From
1986 to 1989,  Mr.  Carter served as President  and Chief  Operating  Officer of
Sabine Corporation.

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

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

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

                                       94
<PAGE>

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

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

         Robert F. Semmens will be appointed,  and has consented to serve,  as a
director of Abraxas,  upon consummation of the Merger.  Mr. Semmens is a partner
of The Beacon Group,  an entity that  controls VOG  Holdings,  LLC, the majority
stockholder of Vessels.  Prior to the formation of The Beacon Group, Mr. Semmens
was a Vice  President of Goldman,  Sachs & Co.  During his ten years at Goldman,
Sachs,  Mr. Semmens worked in the Pipeline & Utilities  Group,  the Energy Group
and at J. Aron & Co.  While  working  in the Energy  Group and at J.  Aron,  Mr.
Semmens  was  responsible  for a  number  of  the  firm's  principal  investment
activities, including reviewing and making investments in the oilfield services,
oil and gas, and  refining  businesses.  Mr.  Semmens is a graduate of the J. L.
Kellogg  Graduate  School of Management,  Northwestern  University  (M.M.),  the
Northwestern  University  School of Law  (J.D.)  and the  University  of Arizona
(B.A.).

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

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

Executive Compensation

         Compensation  Summary.  The  following  table  sets  forth a summary of
compensation for the fiscal years ended December 31, 1994, 1995 and 1996 paid by
the Company to Robert L.G.  Watson,  the  Chairman of the Board,  President  and
Chief Executive Officer of the Company,  Chris E. Williford,  the Executive Vice
President,  Chief Financial Officer and Treasurer of the Company, and Stephen T.
Wendel,  the  Company's  Vice  President-Land  and  Marketing  and to  Robert E.
Patterson,  the Company's Vice President of Operations for the fiscal year ended
December  31,  1996.  Abraxas  did not have any  executive  officers  other than
Messrs.  Watson and  Williford  whose  total  annual  salary and bonus  exceeded
$100,000 for the years ended  December 31,  1994,  and 1995 and Messrs.  Watson,
Williford, Patterson and Wendel for the year ended December 31, 1996.

                                       95
<PAGE>
<TABLE>
<CAPTION>


                           SUMMARY COMPENSATION TABLE

                                                                          Long Term
                                                                        Compensation
                                                                      ------------------
                                       Annual Compensation                 Awards
   ------------------------- -------- ---------------- -------------- ------------------

                                                                           Options
   Name and Principal                                                       /SARs
   Position                   Year      Salary ($)       Bonus ($)           (#)
   ------------------------- -------- ---------------- -------------- ------------------

<S>                          <C>      <C>              <C>                <C>            
   Robert L. G. Watson,      1994     $157,763(1)(2)       ----             ----
   Chairman  of  the  Board  1995     $108,281(1)(3)       ----             60,000
   and President             1996     $133,187         $135,550 (4)        140,000

   Chris E. Williford,       1994     $101,028             ----             ----
   Executive Vice            1995     $115,795(5)          ----            20,000
   President,                1996     $121,315          $72,000 (6)        40,000
   Chief Financial Officer
   and Treasurer

   Robert E. Patterson,      1996     $124,615          $35,000 (7)        60,000
   Vice President of
   Operations

   Stephen T. Wendel,        1994     $58,628              ----             ----
   Vice President - Land     1995     $63,210              ----            20,000
   and Marketing             1996     $76,577           $40,000 (8)        18,660
   ------------------------- -------- ---------------- -------------- ----------------
</TABLE>


(1)      Mr. Watson received repayments of loans to Abraxas of $287,940 during
         1994 and $354,677 during 1995.
(2)      Includes $50,000 of stock awards and $105,000 of salary.
(3)      Includes $1,093 of stock awards and $107,188 of salary.
(4)      Includes $95,000 in cash and $40,550 of stock awards.
(5)      Includes $8,607 of stock awards and $107,188 of salary.
(6)      Includes $36,000 in cash and $36,000 in stock awards.
(7)      Includes $17,500 in cash and $17,500 in stock awards.
(8)      Includes $20,000 in cash and $20,000 in stock awards.

         Grants of Stock Options and Stock Appreciation Rights During the Fiscal
Year Ended December 31, 1996. Pursuant to the Abraxas Petroleum Corporation 1984
Incentive Stock Option Plan (the "ISO Plan"), the Abraxas Petroleum  Corporation
1993 Key  Contributor  Stock  Option  Plan (the  "1993  Plan")  and the  Abraxas
Petroleum  Corporation  1994 Long Term Incentive Plan (the "LTIP"),  the Company
grants to  employees  and  officers of the Company  (including  directors of the
Company who are also employees)  incentive stock options and non-qualified stock
options.  The ISO  Plan,  the 1993  Plan and the  LTIP are  administered  by the
Compensation  Committee  which,  based  upon  the  recommendation  of the  Chief
Executive Officer, determines the number of shares subject to each option.


                                       96
<PAGE>


         The table below contains certain  information  concerning stock options
granted to Messrs. Watson, Williford, Patterson and Wendel during 1996:
<TABLE>
<CAPTION>

                                    OPTION GRANTS IN FISCAL YEAR
- ------------------------------------------------------------------------------------------------------
                               % of Total                                 Potential Realizable Value
                                 Options       Exercise                   at Assumed Annual Rates of
                  Options      Granted to      Price Per     Expiration    Stock Price Appreciation
     Name         Granted       Employees        Share          Date            for Option Term

=============== ============= ============== ============== ============= ============== =============
                                                                               5%            10%
<S>              <C>              <C>            <C>          <C>            <C>          <C>     
Robert   L. G.   40,000(1)        13.25          $5.00        03/07/06         $325,779      $518,748
Watson           100,000(1)       33.14          $7.50        11/20/06       $1,221,671    $1,945,307


Chris E.         20,000(1)        6.63           $5.00        03/07/06         $162,890      $259,374
Williford        20,000(1)        6.63           $7.50        11/20/06         $244,344      $389,061

Robert      E.   40,000(1)        13.25          $6.75        01/02/06         $439,802      $700,310
Patterson        10,000(1)        3.32           $5.00        03/07/06          $81,445      $129,687
                 10,000(1)        3.32           $7.50        11/20/06         $122,172      $194,531

Stephen     T.   10,660 (1)       3.54           $5.00        03/07/06          $86,722      $138,260
Wendel           8,000 (1)        2.66           $7.50        11/20/06          $97,760      $155,600

</TABLE>

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

         The table below contains certain  information  concerning  exercises of
stock options during the fiscal year ended December 31, 1996 by Messrs.  Watson,
Williford,  Patterson  and Wendel and the fiscal  year end value of  unexercised
options held by Messrs. Watson, Williford, Patterson and Wendel.
<TABLE>
<CAPTION>

                        Aggregated Option Exercises in Fiscal 1996 and Fiscal Year End Option Values
                                                                 Number of Unexercised       Value of Unexercised
                                                                Options on December 31,    in-the-Money Options on
                                 Shares Acquired                 1996 (#) Exercisable/      December 31, 1996 ($)
                                 By Exercise (#)     Value           Unexercisable               Exercisable/
              Name                                Realized ($)                                  Unexercisable
- ----------------------------------------------------------------------------------------------------------------------

<S>                                           <C>        <C>            <C>                      <C>          
Robert L. G. Watson                           -            -            15,000/85,000            $46,875/$573,125

Chris E. Williford                            -            -            20,000/60,000            $62,500/$207,500

Robert E. Patterson                           -            -                 0/60,000                 $0/$197,500

Stephen T. Wendel                             -            -            16,840/36/160            $56,375/$125,655

</TABLE>

         Long Term  Incentive  Plan Awards During the Fiscal Year Ended December
31,  1996.  The  Company  did not  make any  awards  to any of  Messrs.  Watson,
Williford,  Patterson  and Wendel  under a long term  incentive  plan during the
fiscal year ended December 31, 1996.

         Employment   Agreements.   The  Company  has  entered  into  Employment
Agreements (the "Employment Agreements") with each of Messrs. Watson, Williford,
Patterson  and  Wendel,  pursuant  to which each of Messrs.  Watson,  Williford,
Patterson and Wendel will receive  compensation  as determined from time to time

                                       97
<PAGE>

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

         Compensation of Directors.

         Non-Qualified  Stock Option Plan.  Each director of the Company,  other
than Messrs. Watson, Williford,  Carter and Gershen, has previously been granted
options to  purchase  8,900  shares of Common  Stock  under the  Company's  1984
Non-Qualified Stock Option Plan (the "Non-Qualified  Plan"). There are currently
outstanding  options  to  purchase  8,900  shares  of  Common  Stock  under  the
Non-Qualified Plan. Mr. Burke holds an option to purchase 8,900 shares of Common
Stock at an exercise price of $6.75 per share.

         Restricted  Share Plan for  Directors.  Pursuant to the Director  Share
Plan, each director of the Company, other than Messrs. Watson and Williford,  is
entitled to receive a grant of shares of Common Stock or cash for  attendance at
regular and special meetings of the Board of Directors.  Each eligible  director
of the Company was issued 400 shares of Common  Stock  during 1994 as an initial
grant under the Director Share Plan and  thereafter  receives a number of shares
of Common  Stock equal to the product of 1,000 times the  Capitalization  Factor
(as defined in the Director  Share Plan)  divided by the Average Stock Price (as
defined in the  Director  Share  Plan) as of the date of a meeting of the Board.
For 1996,  each of the  directors  received the number of shares of Common Stock
set forth opposite his name under the Director Share Plan:

                                                              Number of
Name                                                            Shares

Franklin M. Burke                                                   695
Harold D. Carter                                                    493
Robert D. Gershen                                                   695
Richard M. Kleberg                                                  958
James C. Phelps                                                   1,698
Paul A. Powell                                                      796
Richard M. Riggs                                                  1,698

                                       98
<PAGE>

         Abraxas Petroleum  Corporation  Director Stock Option Plan. Pursuant to
the Director Stock Option Plan, each member of the Company's Board of Directors,
other than Messrs. Watson and Williford,  was granted an option to acquire 8,000
shares  at a price of $6.75 per share on June 1,  1996.  Directors  who join the
Board for the first  time after June 1, 1996,  including  Mr.  Semmens,  will be
granted  an  option to  acquire  8,000  shares of Common  Stock on the date they
become Directors.  Options vest evenly over a four year period commencing on the
first  anniversary  date of the  grant  and each  option  expires  on the  tenth
anniversary of the date of the grant.

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


                                       99
<PAGE>


                              CERTAIN TRANSACTIONS

Abraxas

         Messrs.  Watson,  Phelps  and Riggs were  founders  of Grey Wolf and in
April 1995 purchased 900,000 shares of the capital stock of Grey Wolf (initially
representing  39% of the  outstanding  shares) for an  aggregate of C$90,000 (or
C$0.10 per share) in cash. In January  1996,  the Company  purchased  20,325,096
shares of the capital stock of Grey Wolf  (representing  78% of the  outstanding
shares) for an aggregate of approximately  C$4.1 million (or C$.20 per share) in
cash. In November 1997, Grey Wolf merged with Cascade. Messrs. Phelps, Riggs and
Watson  currently  own  4.8% of the  issued  and  outstanding  capital  stock of
Cascade.

         Messrs. Phelps and Riggs own options to purchase in the aggregate up to
1,000,000  shares of capital stock of Cascade at an exercise  price of C$.20 per
share, and Mr. Watson owns options to purchase up to 800,000 shares of Cascade's
capital  stock at an exercise  price of C$.34 per share.  Cascade  currently has
76,980,913 shares of capital stock outstanding.

         Wind River Resources  Corporation  ("Wind  River"),  all of the capital
stock of which is owned by Mr. Watson, owns a twin-engine airplane. The airplane
is  available  for business use by employees of the Company from time to time at
Wind  River's  cost.  The Company paid Wind River a total of $101,421 for use of
the plane during 1996.

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

Vessels

         Mr. Semmens received no compensation as director of Vessels, except for
reimbursement of travel expenses to attend board meetings.



                                       100
<PAGE>


                          SECURITY OWNERSHIP OF CERTAIN
                        BENEFICIAL OWNERS AND MANAGEMENT

Abraxas

         Based upon information received from the persons concerned, each person
known to the Company to be the beneficial owner of more than five percent of the
outstanding  shares of Common Stock of the Company,  each executive  officer and
director,  and all  directors  and  officers  of the  Company as a group,  owned
beneficially  as of January 1, 1998 the number  and  percentage  of  outstanding
shares of Common Stock of the Company indicated in the following table:


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

Robert L. G. Watson              284,505 (2)                          4.43
Endowment Advisors, Inc.         863,790 (3)                         13.45
      450 Post Road East
      Westport, CT  06881
Wellington Management            569,000 (4)                          8.86
      Company
      75 State Street
      19th Floor
      Boston, MA 02109
Westcliff Capital                471,300 (5)                          7.34
Management, LLC
      200 7th Avenue, # 105
      Santa Cruz, CA 95062
Dimensional Fund Advisors,       332,700 (6)                          5.18
Inc.
      1299 Ocean Avenue
      11th Floor
      Santa Monica, CA
90401
Franklin A. Burke                116,642 (7)                          1.82
Paul A. Powell, Jr.               34,291 (8)                             *
James C. Phelps                   35,807 (9)                             *
Richard M. Kleberg, III           33,714 (10)                            *
Robert D. Gershen                 25,689 (11)                            *
Chris E. Williford                40,908 (12)                            *
Richard M. Riggs                  16,013 (13)                            *
Harold D. Carter                   7,493 (14)                            *
Robert E. Patterson               22,223 (15)                            *
Stephen T. Wendel                 29,301 (16)                            *
All Officers and Directors       646,586 (2)(7)(8)                   10.07
as a                                    (9)(10)(11)(12)
      Group (11 persons)                (13)(14)
                                        (15)(16)

                                      101
<PAGE>


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

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

(2)      Includes  20,316 shares owned by Wind River  Resources  Corporation,  a
         corporation owned by Mr. Watson, as to which Mr. Watson has sole voting
         and investment  power,  13,545 shares issuable upon exercise of options
         granted pursuant to Abraxas Petroleum  Corporation 1993 Key Contributor
         Stock Option Plan and 51,645  shares  issuable upon exercise of options
         granted  pursuant to the Abraxas  Petroleum  Corporation 1994 Long Term
         Incentive  Plan. Does not include a total of 75,880 shares owned by the
         Robert L. G.  Watson,  Jr.  Trust and the Carey B.  Watson  Trust,  the
         trustees of which are Mr. Watson's  brothers and the  beneficiaries  of
         which  are Mr.  Watson's  children.  Mr.  Watson  disclaims  beneficial
         ownership of the shares owned by these trusts.

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

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

(5)      Westcliff Capital  Management,  LLC is an investment  manager which has
         the power to make investment decisions for unrelated clients.

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

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

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

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

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

                                      102
<PAGE>

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

(12)     Includes  1,786  shares  issuable  upon  exercise  of  options  granted
         pursuant to the Abraxas  Petroleum  Corporation  1984  Incentive  Stock
         Option Plan,  14,777 shares  issuable upon exercise of options  granted
         pursuant  to the Abraxas  Petroleum  Corporation  1993 Key  Contributor
         Stock Option Plan and 20,000  shares  issuable upon exercise of options
         granted  pursuant to the Abraxas  Petroleum  Corporation 1994 Long Term
         Incentive Plan.

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

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

(15)     Includes  20,000  shares  issuable  upon  exercise  of options  granted
         pursuant to the Abraxas Petroleum  Corporation 1994 Long Term Incentive
         Plan.

(16)     Includes  4,340  shares  issuable  upon  exercise  of  options  granted
         pursuant to the Abraxas  Petroleum  Corporation  1984  Incentive  Stock
         Option Plan,  7,500 shares  issuable upon  exercise of options  granted
         pursuant to the Abraxas  Petroleum  Corporation Key  Contributor  Stock
         Option Plan and 14,665 shares issuable upon exercise of options granted
         pursuant to the Abraxas Petroleum  Corporation 1994 Long Term Incentive
         Plan.


                                      103
<PAGE>


Vessels

         Based  upon  information  received  from  the  persons  concerned,  the
following  table  sets  forth  certain  information   regarding  the  beneficial
ownership  of Vessels  Common  Stock as of  January  1, 1998 and the  beneficial
ownership of Abraxas Common Stock such shares will represent after the Merger by
each  person  known to  Vessels  to be the  beneficial  owner of more  than five
percent  of the  outstanding  shares of Vessels  Common  Stock,  each  executive
officer and director of Vessels,  and all directors and officers of Vessels as a
group:

      Name and Address of              Number of
        Beneficial Owner               Shares (1)           Percentage
VOG Holdings, LLC                        24,656.88(2)              68.92%
     399 Park Avenue
     New York, NY 10022
Thomas J. Vessels                         4,112.38(3)               11.49
     180 Marion Street
     Denver, CO 80218
Mary W. Vessels                           3,157.92(4)                8.83
     #3 Cheesman Gardens
     1510 E. 10th Avenue
     Denver, CO  80218
Annette V. Lagunes                        1,602.53(5)                4.48
Stephen T. Vessels                          708.94(6)                1.98
W. Michael Neumann, Jr.                     173.18(7)                   *
Robert F. Semmens                        24,656.88(8)               68.92
Harold W. Pote                           24,656.88(8)               68.92
Richard A. Aube                                    --                  --
William F. Wallace                                 --                  --
All Officers and Directors as a             31,253.91               87.36
     Group (8 persons)
- -----------------------
     *   Less than 1%

(1)  Unless otherwise  indicated,  all shares are held directly with sole voting
     and investment power.
(2)  Includes  1,004.88 shares subject to currently  exercisable  warrants which
     will be terminated upon closing of the Merger.
(3)  Includes 133.38 shares subject to currently exercisable warrants which will
     be terminated upon closing of the Merger.
(4)  Includes an option to purchase 347 shares from Stephen T. Vessels. Includes
     150.41  shares  subject to  currently  exercisable  warrants  which will be
     terminated upon closing of the Merger.
(5)  Includes 43 shares owned by the Minor's  Trust for Paul F. Lagunes of which
     Ms.  Lagunes is the Trustee.  Includes  62.33  shares  subject to currently
     exercisable  warrants  held by Ms.  Lagunes  and  0.70  shares  subject  to
     currently  exercisable  warrants  held by the  Minor's  Trust  for  Paul F.
     Lagunes,  all of which  warrants  will be  terminated  upon  closing of the
     Merger.
(6)  Includes 27.44 shares subject to currently  exercisable warrants which will
     be terminated upon closing of the Merger.
(7)  Includes 3.18 shares subject to currently exercisable options which will be
     terminated upon closing of the Merger.

                                      104
<PAGE>


(8)  Consists of 23,652 shares held by VOG  Holdings,  LLC with respect to which
     Mr. Semmens and Mr. Pote exercise  voting power and 1,004.88 shares subject
     to currently  exercisable warrants held by VOG Holdings,  LLC which will be
     terminated upon closing of the Merger.


                                      105
<PAGE>


                      DESCRIPTION OF ABRAXAS CAPITAL STOCK

Common Stock

         Abraxas is authorized to issue  50,000,000  shares of Common Stock, par
value $.01 per share.  AtJanuary 6, 1998, there were 6,422,540 shares of Abraxas
Common Stock  issued and  outstanding.  Holders of the Abraxas  Common Stock are
entitled to cast one vote for each share held of record on all matters submitted
to a vote of  stockholders  and are  not  entitled  to  cumulate  votes  for the
election of directors.  Holders of Abraxas  Common Stock do not have  preemptive
rights to  subscribe  for  additional  shares of Abraxas  Common Stock issued by
Abraxas.

         Holders of the Abraxas  Common Stock are entitled to receive  dividends
as may be  declared by the Board of  Directors  out of funds  legally  available
therefor. Under the terms of the Credit Facility,  Abraxas may not pay dividends
on shares of the Abraxas Common Stock. In the event of  liquidation,  holders of
the Common Stock are entitled to share pro rata in any  distribution of Abraxas'
assets  remaining after payment of  liabilities,  subject to the preferences and
rights of the holders of any outstanding  shares of Preferred  Stock. All of the
outstanding shares of the Abraxas Common Stock are fully paid and nonassessable.

         References  herein to Abraxas'  Common  Stock  include the common share
purchase rights  distributed by Abraxas to its stockholders on November 17, 1994
as long as they trade with the Abraxas Common Stock. See "-- Stockholder  Rights
Plan".

Preferred Stock

         Abraxas'  Articles of  Incorporation  authorize  the  issuance of up to
1,000,000  shares of Preferred  Stock,  par value $.01 per share, in one or more
series. The Board of Directors is authorized,  without any further action by the
stockholders,  to  determine  the dividend  rights,  dividend  rate,  conversion
rights, voting rights, rights and terms of redemption,  liquidation preferences,
sinking fund terms and other rights, preferences, privileges and restrictions of
any  series of  Preferred  Stock,  the  number of shares  constituting  any such
series, and the designation  thereof.  The rights of the holders of Common Stock
will be subject to, and may be  adversely  affected by, the rights of holders of
any  Preferred  Stock that may be issued in the  future.  There are no shares of
Preferred Stock outstanding.

Warrants

         Abraxas has warrants ("Warrants")  outstanding to purchase an aggregate
of 225,500  shares of Abraxas Common Stock.  Associated  Energy  Managers,  Inc.
("AEM"),  has Warrants to purchase  13,500 shares at an exercise  price of $7.00
per share.  First Union  National  Bank of North  Carolina  ("First  Union") has
Warrants to purchase 212,000 shares of Abraxas Common Stock at an exercise price
of $9.79 per share. These Warrants were issued to First Union in connection with
Abraxas' credit agreement.  First Union and AEM have certain registration rights
with respect to shares of the Common  Stock  issued  pursuant to the exercise of
such Warrants. See " -- Registration Rights."

         Vessels has Warrants outstanding to purchase an aggregate of 230 shares
of Vessels Common Stock. After consummation of the Merger, based upon the amount
of the Projected Provisional Payment,  Chase Securities Inc. ("Chase") will have
Warrants to purchase  6,890 shares of Abraxas  Common Stock at an exercise price
of $56.60  per share and AEM will have  Warrants  to  purchase  2,650  shares of
Abraxas  Common  Stock at an exercise  price of $56.60 per share and Warrants to
purchase an additional 2,650 shares of Abraxas Common Stock at an exercise price
of $25.47 per share. AEM and Chase have certain registration rights with respect
to shares of Abraxas Common Stock issued pursuant to the exercise of Warrants.
See "--Registration Rights."

         All outstanding Warrants contain provisions that protect AEM, Chase and
First Union  against  dilution by adjusting  the price at which the Warrants are
exercisable  and the number of shares of the Abraxas  Common Stock issuable upon
exercise  thereof upon the occurrence of certain  events,  including  payment of
stock   dividends   and   distributions,    stock   splits,   recapitalizations,
reclassifications,  mergers,  consolidations  or the  issuance or sale of Common

                                      106
<PAGE>

Stock or options,  rights or  securities  convertible  into shares of the Common
Stock,  in the case of AEM and Chase,  at less than the current market price or,
in the case of First  Union,  at a price less than the  greater  of the  current
market  price or the  exercise  price.  A holder of Warrants  has no rights as a
stockholder  of Abraxas  until the  Warrants  are  exercised.  All  Warrants are
currently exercisable, although none have been exercised as of the date hereof.

Registration Rights

         The shares of the Abraxas Common Stock to be received by AEM, Chase and
First Union upon  exercise of Warrants  and any shares of the Common Stock owned
by Endowment  Energy  Partners,  L.P.  ("EEP") and Endowment Energy Partners II,
Limited  Partnership  ("EEP II") are entitled to certain  rights with respect to
the registration of such shares under the Securities Act.

         Under the terms of the  Registration  Rights Agreement with EEP and EEP
II, in the event that  Abraxas  proposes to  register  any shares of the Abraxas
Common  Stock or  securities  convertible  into  Abraxas  Common Stock under the
Securities Act for its own account, except in certain circumstances, EEP and EEP
II are entitled to include shares of Abraxas  Common Stock in such  registration
("Piggyback Registration"), subject to the right of the underwriters of any such
offering to limit the number of shares  included in such  registration.  Abraxas
has agreed to pay all  expenses  in  connection  with a  Piggyback  Registration
except for underwriting  discounts and selling  commissions which shall be borne
by EEP and/or EEP II with respect to shares of the Abraxas Common Stock owned by
EEP and EEP II other than the 211,500 shares of Abraxas Common Stock acquired by
EEP and EEP II through the  exercise of the Warrants  formerly  owned by EEP and
EEP II ("Warrant  Shares").  EEP and EEP II have the additional right to require
("Demand  Registration") Abraxas to effect one Demand Registration of all shares
of the Abraxas Common Stock (other than Warrant  Shares) in the aggregate at any
time and Abraxas is required  to effect  such  registration,  subject to certain

conditions and limitations. Abraxas is required to bear the expenses of a Demand
Registration  except for underwriting  discounts and selling  commissions  which
shall be borne by EEP  and/or EEP II with  respect  to shares of Abraxas  Common
Stock owned by EEP and EEP II other than Warrant  Shares.  Abraxas has agreed to
customary  indemnities  including an agreement to indemnify,  subject to certain
limited exceptions,  EEP and EEP II in connection with a Demand Registration and
a Piggyback Registration.

         Under  the  terms  of its  Warrants,  AEM has the  right  to  unlimited
Piggyback  Registrations and, with respect to its Vessels Warrants, the right to
one  Demand  Registration.  EEP  and  EEP  II  have  the  right  to  one  Demand
Registration  in the aggregate at any time after December 20, 1995 and unlimited
Piggyback  Registrations  with respect to Warrant Shares.  Abraxas has agreed to
pay all expenses in connection  with Piggyback  Registrations  by AEM and by EEP
and EEP II with respect to Warrant Shares and to share expenses equally with EEP
and EEP II with respect to Warrant Shares  registered in a Demand  Registration;
provided,  however, all underwriting  discounts and selling commissions shall be
borne by EEP, EEP II or AEM, as the case may be. AEM's Vessels  Warrants require
Abraxas to pay all expenses  incurred in connection  with any such  registration
other than underwriting  discounts and selling  commissions which shall be borne
by AEM. Abraxas has also agreed to customary indemnities, including an agreement
to indemnify,  subject to certain  limitations,  AEM in connection with a Demand
Registration and a Piggyback Registration.

         Under  the  terms of its  Warrants,  First  Union  has the right to two
Demand  Registrations  and,  subject to the rights to Piggyback  Registration of
EEP, EEP II and AEM,  unlimited  Piggyback  Registrations.  Abraxas will pay all
expenses  incurred  in  connection  with  any  such   registration   other  than
underwriting  discounts  and selling  commissions  which shall be borne by First
Union. Abraxas has also agreed to customary indemnities,  including an agreement
to indemnify,  subject to certain limitations,  First Union in connection with a
Demand Registration and a Piggyback Registration.

         Under the terms of its Warrants,  Chase has the right to two (2) Demand
Registrations  and  unlimited  Piggyback  Registrations.  Abraxas  will  pay all
expenses  incurred  in  connection  with  any  such   registration   other  than
underwriting  discounts and selling  commissions  which shall be borne by Chase.
Abraxas has also agreed to  customary  indemnities,  including  an  agreement to

                                      107
<PAGE>

indemnify,  subject to certain  limitations,  Chase in connection  with a Demand
Registration and a Piggyback Registration.

         At the Closing, Abraxas will enter into a Registration Rights Agreement
with VOG  Holdings,  LLC  ("VOG")  and a similar  agreement  with the  remaining
Vessels  stockholders  (the  "Stockholders").  Each of VOG and the  Stockholders
shall have the right to unlimited Piggyback Registrations,  subject to the right
of the  underwriters of any such offering to limit the number of shares included
in such  registration.  Each of VOG and the Stockholders,  as a group, also have
the right to require Abraxas to effect one (1) Demand Registration.  Abraxas has
agreed to pay all expenses in connection with any registrations on behalf of VOG
and the Stockholders except for underwriters' discounts and commissions and fees
and disbursements of VOG's and the Stockholders' counsel.  Abraxas has agreed to
customary  indemnities  including an agreement to indemnify,  subject to certain
limited  exceptions,  VOG and  the  Stockholders  in  connection  with a  Demand
Registration and a Piggyback Registration.

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

         Abraxas'  Articles of Incorporation and Bylaws provide for the Board of
Directors  to be divided  into  three  classes of  directors  serving  staggered
three-year terms. As a result, approximately one-third of the Board of Directors
will be elected each year. The Articles of Incorporation and Bylaws provide that
the Board of Directors  will consist of not less than three nor more than twelve
members,  with  the  exact  number  to be  determined  from  time to time by the
affirmative  vote of a  majority  of  directors  then in  office.  The  Board of
Directors,  and not the stockholders,  has the authority to determine the number
of  directors,  and  could  prevent  any  stockholder  from  obtaining  majority
representation  on  Abraxas'  Board  of  Directors  by  enlarging  the  Board of
Directors  and by  filling  the new  directorships  with the  stockholder's  own
nominees.  In addition,  directors may be removed by the  stockholders  only for
cause.

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

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

Stockholder Rights Plan

         On November  17,  1994,  the Board of  Directors  of Abraxas  adopted a
stockholder rights plan (the "Rights Plan"). Under the terms of the Rights Plan,
the Board of  Directors  of  Abraxas  declared a  dividend  of one common  share
purchase right  ("Right") on each share of the Abraxas Common Stock  outstanding
on November 17, 1994.  Each Right entitles the holder thereof to buy one-half of
one share of Abraxas Common Stock at an exercise price of $40 per share ($20 per
half share), subject to adjustment.

         The  Rights  are not  exercisable  until the  occurrence  of  specified
events.  Upon the occurrence of such an event (which events are generally  those
which would signify the commencement of a hostile bid to acquire  Abraxas),  the
Rights then become exercisable (unless redeemed by the Board of Directors) for a
number of shares of Abraxas Common Stock having a market value of four times the
exercise price of the Right. If the acquiror were to conclude the acquisition of
Abraxas,   the  Rights  would  then  become   exercisable   for  shares  of  the
controlling/surviving  corporation  having a value of four  times  the  exercise

                                      108
<PAGE>

price of the  Rights.  If the Rights  were  exercised  at any time,  significant
dilution would result, thus making the acquisition  prohibitively  expensive for
the  acquiror.  In order to  encourage a bidder to  negotiate  with the Board of
Directors,  the Rights  Plan  provides  that the Rights  may be  redeemed  under
prescribed circumstances by the Board of Directors.

         The Rights are not  intended  to prevent a takeover of Abraxas and will
not  interfere  with any tender  offer or business  combination  approved by the
Board of Directors.  The Rights Plan is intended to protect the  stockholders in
the event of (a) an unsolicited offer to acquire Abraxas,  including offers that
do not treat all stockholders equally, (b) the acquisition in the open market of
shares  constituting  control  of  Abraxas  without  offering  fair value to all
stockholders  and (c) other  coercive  takeover  tactics  which could impair the
Board's ability to fully represent the interests of the stockholders.

Anti-takeover Statutes

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

         Restrictions   on  Certain   Combinations   Between   Nevada   Resident
Corporations and Interested Stockholders

         The  Nevada  GCL  includes   certain   provisions   (the   "Combination
Provisions")  prohibiting certain  "combinations"  (generally defined to include
certain  mergers,  disposition  of assets  transactions,  and share  issuance or
transfer   transactions)   between  a  resident  domestic   corporation  and  an
"interested stockholder" (generally defined to be the beneficial owner of 10% or
more of the voting power of the outstanding  shares of the corporation),  except
those  combinations  which are  approved  by the board of  directors  before the
interested stockholder first obtained a 10% interest in the corporation's stock.
There are additional exceptions to the prohibition,  which apply to combinations
if they occur more than three years after the interested  stockholder's  date of
acquiring shares. The Combination Provisions apply unless the corporation elects
against  their  application  in its  original  articles of  incorporation  or an
amendment  thereto,  or in its bylaws.  Abraxas'  Articles of Incorporation  and
Bylaws do not currently contain a provision rendering the Combination Provisions
inapplicable. The Merger is not subject to the Combination Provisions.

Nevada Control Share Act

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

         Under the Control Share Act, an "issuing  corporation" is a corporation
organized in Nevada which has 200 or more stockholders, at least 100 of whom are
stockholders  of  record  (which  for  this  purpose  includes   registered  and
beneficial  owners) and  residents of Nevada,  and which does business in Nevada
directly or through an affiliated company.  The status of Abraxas at the time of
the occurrence of a transaction governed by the Control Share Act (assuming that
Abraxas'  Articles of  Incorporation or Bylaws have not theretofore been amended
to include an opting out provision)  would  determine  whether the Control Share
Act is applicable.

         The Control  Share Act  requires an  Acquiring  Person to take  certain
procedural steps before he or it can obtain the full voting power of the control
shares. "Control shares" are the shares of a corporation (1) acquired or offered
to be acquired  which will  enable the  Acquiring  Person to own a  "controlling
interest," and (2) acquired  within 90 days  immediately  preceding that date. A
"controlling  interest" is defined as the ownership of shares which would enable

                                      109
<PAGE>

the Acquiring  Person to exercise  certain  graduated  amounts  (beginning  with
one-fifth) of all voting power of the corporation.  The Acquiring Person may not
vote any control shares without first obtaining  approval from the  stockholders
not characterized as "interested stockholders" (as defined below).

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

         "Interested  Stockholder"  is  defined  as a person  who,  directly  or
indirectly,  exercises the voting power of an issuing corporation and who is (1)
an acquiring  person,  (2) an officer of the  corporation or (3) an employee and
director of the corporation. At the special or annual meeting at which the issue
of voting rights of control shares will be addressed,  "interested stockholders"
may  not  vote  on the  question  of  granting  voting  rights  to  control  the
corporation  or its parent unless the articles of  incorporation  of the issuing
corporation  provide  otherwise.  Abraxas'  Articles  of  Incorporation  do  not
currently contain a provision allowing for such voting power.

         If  full  voting  power  is  granted  to the  Acquiring  Person  by the
disinterested stockholders, and the Acquiring Person has acquired control shares
with a majority or more of the voting power, then (unless otherwise  provided in
the articles of incorporation or bylaws in effect on the tenth day following the
acquisition of a controlling  interest) all  stockholders of record,  other than
the Acquiring Person,  who have not voted in favor of authorizing  voting rights
for the control  shares,  must be sent a notice advising them of the fact and of
their  right to receive  "fair  value" for their  shares.  Abraxas'  Articles of
Incorporation and Bylaws do not provide otherwise. Within 20 days of the mailing
of the notice,  any such  stockholder may demand to receive from the corporation
the "fair  value" for all or part of his shares.  "Fair value" is defined in the
Control  Share  Act as "not less than the  highest  price per share  paid by the
Acquiring Person in an acquisition."

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

                      COMPARISON OF RIGHTS OF STOCKHOLDERS
                   OF THE COMPANY AND STOCKHOLDERS OF VESSELS

         Upon  consummation  of the Merger,  the  stockholders  of Vessels  will
become stockholders of the Company whose rights will (i) be defined and governed
by the Nevada  Statute and cease to be defined and governed by the DGCL and (ii)
cease to be defined and governed by the Certificate of Incorporation and By-laws
of  Vessels  and will be defined  and  governed  by the  Company's  Articles  of
Incorporation, as amended (the "Company Articles"), and the Amended and Restated
By-laws of the  Company  (the  "Company  By-laws").  Certain  provisions  of the
Company Articles and the Company By-laws alter the rights which  stockholders of
Vessels  presently  have and also  alter  certain  powers of  management.  These
provisions  are summarized  below.  This summary is qualified in its entirety by
reference to the Company  Articles,  the Certificate of Incorporation of Vessels
(the "Vessels Certificate"),  the By-laws of Vessels (the "Vessels By-laws") and
applicable law. In addition,  the Company could implement  certain other changes
by amending the Company  Articles or the Company  By-laws.  For a discussion  of
such changes,  see "Certain  Differences  Between Nevada and Delaware  Corporate
Laws."

Number of Directors

         The Company.  The Company  By-laws  provide  that its initial  Board of
Directors  shall consist of seven (7)  directors,  until changed by amendment of
the Company By-laws. The current number of directors of the Company is nine (9).

                                      110
<PAGE>

The Company's current Board of Directors is divided into three classes, with the
term of  three  (3)  directors  to  expire  in  each of  1998,  1999  and  2000,
respectively. See "Management of Abraxas After the Merger."

         Vessels.  The Vessels By-laws provide that its Board of Directors shall
consist of not less than three (3) directors,  until changed by amendment of the
Vessels  By-laws.  The current  number of directors of Vessels is seven (7). The
Vessels  Board of Directors is not divided  into classes and all  directors  are
elected at each annual meeting.

Monetary Liability of Directors

         The  Company.  The  Company  Articles  provide for the  elimination  of
personal  monetary  liability  of directors  and officers to the fullest  extent
permissible under the Nevada Statute.

         Vessels.  The  Vessels  Certificate  provides  for the  elimination  of
personal monetary liability of directors to the fullest extent permissible under
the DGCL.  This provision  incorporates  future  amendments to Delaware law with
respect to the elimination of such liability.

Removal of Directors

         The Company.  The Company  By-laws  provide that any  director,  or the
entire Board of Directors,  may be removed from office at any time, but only for
cause and only by the  affirmative  vote of the  holders  of at least 80% of the
voting power of the then outstanding shares of the Abraxas Common Stock entitled
to vote  generally in the  election of  directors,  voting  together as a single
class.

         Vessels.  The Vessels By-laws  provide that,  except as provided by the
DGCL,  the  stockholders  of Vessels  may remove one or more  directors  with or
without  cause at a meeting of  stockholders  duly  called for such  purposes or
otherwise in the manner provided in the DGCL.

Amendment of Articles/Certificate of Incorporation

         The Company.  The Company Articles reserve for the Company the right to
amend any provision contained in the Company Articles.

         Vessels.  The Vessels  Certificate  is silent with  respect to the vote
required to amend the Vessels Certificate and, therefore,  the DGCL governs. See
"Certain  Differences  Between Nevada and Delaware Corporate Laws --Amendment of
Articles/Certificate of Incorporation."


                                      111
<PAGE>


                       CERTAIN DIFFERENCES BETWEEN NEVADA
                           AND DELAWARE CORPORATE LAWS

         The Nevada Statute  governs the rights of  stockholders  of the Company
and will govern the rights of Vessels  stockholders  who become  stockholders of
the Company. The Nevada Statute and the DGCL differ in many respects. Certain of
the significant differences between the provisions of the Nevada Statute and the
DGCL that  could  materially  affect  the  rights of  Vessels  stockholders  are
discussed below.

Amendment of Articles/Certificate of Incorporation

         Under the Nevada Statute, a corporation's articles of incorporation may
be amended by the  affirmative  vote of the  holders of a majority of the voting
power, or such greater  proportion of the voting power as may be required in the
case of a vote by classes or series.  No such  different  amount is specified in
the Company Articles.

         Under  the  DGCL,   amendments  to  a   corporation's   certificate  of
incorporation  require the approval of a majority of the Board of Directors  and
stockholders  holding a majority of the  outstanding  shares entitled to vote on
such amendment and, in certain  circumstances,  the holders of a majority of the
outstanding  stock of each class  entitled to vote on such amendment as a class,
unless a greater  proportion is specified in the certificate of incorporation or
by other  provisions of the DGCL. No such  different  amount is specified in the
Vessels Certificate.

Cumulative Voting

         Under  the  Nevada  Statute  and the  DGCL,  cumulative  voting  is not
available unless so provided in a corporation's  articles of incorporation.  The
Company Articles expressly prohibit  cumulative voting. The Vessels  Certificate
does not provide for cumulative voting.

Preemptive Rights

         Under the Nevada  Statute,  for  corporations  formed before October 1,
1991,  except to the extent limited or denied by the articles of  incorporation,
stockholders  of a  corporation  have a  preemptive  right to  acquire  unissued
shares,  treasury shares or securities convertible into such shares. The Company
Articles expressly deny preemptive rights to the Company's stockholders.

         Under the DGCL, stockholders have no preemptive rights to subscribe for
additional  issues  of stock or to any  security  convertible  into  such  stock
unless, and except to the extent that, such rights are expressly provided in the
certificate  of  incorporation.  The  Vessels  Certificate  contains  no express
provision providing preemptive rights to its stockholders.

Classified Board

         The  Nevada  Statute  permits  the  adoption  of a board  of  directors
classified as to the duration of their respective terms of office or as to their
election  by one or more  authorized  classes  or series of  shares.  The Nevada
Statute  requires  that at least  one-fourth in number of the directors of every
corporation be elected  annually.  The Company has adopted a classified board of
directors.

         The DGCL permits the division of directors of a  corporation  into one,
two or three  classes,  with the term of one class of directors  expiring at the
next annual  meeting,  the second class one year  thereafter and the third class
two years thereafter;  and at each annual meeting held after such classification
and election,  directors shall be chosen for a full term, as the case may be, to
succeed those whose terms expire.  Vessels has not adopted a classified board of
directors.

                                      112
<PAGE>


Indemnification of Directors and Officers; Insurance

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

         The  Nevada  Statute  and the  DGCL  also  authorize  the  purchase  of
insurance to protect officers and directors from certain liabilities,  including
liabilities  against which the  corporation  cannot  indemnify its directors and
officers.  The Company and Vessels  each  currently  maintain a  directors'  and
officers' liability insurance policy.

Limitation on Director Liability

         The Nevada  Statute  provides  that a  corporation  may  include in its
articles of  incorporation  a provision  eliminating  or limiting  the  personal
liability  of its  directors or officers for damages for any breach of fiduciary
duty as a director or officer,  except for (i) acts or omissions  which  involve
intentional misconduct, fraud or a knowing violation of law, or (ii) the payment
of improper dividends. The Company Articles contain a provision which eliminates
director and officer liability to the extent allowed by the Nevada Statute.

         The DGCL  permits  a  corporation  to  include  in its  certificate  of
incorporation a provision  eliminating or limiting a director's liability to the
corporation or its  stockholders  for monetary damages for breaches of fiduciary
duty. The DGCL expressly provides,  however,  that the liability for breaches of
the  duty  of  loyalty,  acts  or  omissions  not in  good  faith  or  involving
intentional misconduct or knowing violation of the law, the unlawful purchase or
redemption of stock or payment of unlawful  dividends or the receipt of improper
personal benefits cannot be eliminated in this manner. The DGCL further provides
that no such provision  shall eliminate or limit the liability of a director for
any act or  omission  occurring  prior to the date when such  provision  becomes
effective.  The Vessels Certificate  contains a provision  eliminating  director
liability to the extent permitted by the DGCL.

Removal of Directors

         Under the Nevada Statute a director or the entire board of directors of
a  corporation  without a classified  board of directors  can be removed with or
without cause by the holders of not less than two-thirds of shares then entitled
to vote in an  election of  directors.  The  Company's  By-laws  provide  that a
director or the entire board of directors may be removed only for cause and only
upon the affirmative  vote of the holders of at least 80% of the voting power of
the then outstanding shares of the Company Common Stock.

         Under  the  DGCL,   unless   otherwise   provided  in  a  corporation's
certificate  of  incorporation  or by-laws,  any director or the entire board of
directors may be removed, with or without cause, by the holders of a majority of
the shares then  entitled to vote an  election of  directors,  except (i) in the
case of a corporation  having a classified  board, and unless the certificate of
incorporation provides otherwise,  stockholders may effect such removal only for
cause, and (ii) in the case of a corporation  having cumulative  voting, if less
than the entire board is to be removed, no director may be removed without cause
if the votes cast against his removal  would be  sufficient to elect him if they
were  cumulatively  voted at an election of the entire board of  directors.  The
Vessels By-laws provide that the  stockholders of Vessels may remove one or more
directors  with or without  cause at a meeting of  stockholders  duly called for
such purpose and otherwise in the manner  provided in the  applicable law of the
State of Delaware.


                                      113
<PAGE>


Inspection of Books and Records

         The Nevada Statute permits any person who shall have been a stockholder
for at least six months  immediately  preceding his demand, or who is the holder
of at least 5% of the  outstanding  stock of the  corporation,  to  examine  the
stockholder  ledger and to make  abstracts  therefrom,  provided  that a written
demand setting forth a proper purpose of such  examination is made and served on
the statutory agent of the corporation.

         The DGCL permits any  stockholder of record to inspect a  corporation's
stock  ledger,  the  stockholder  list and its other  books and  records for any
purpose reasonably  related to such person's interest as a stockholder  provided
that his written demand under oath is directed to the  corporation's  registered
office in Delaware or to its principal place of business.

Right to Call Special Meetings of Stockholders

         Under  the  Nevada  Statute  special  meetings  of  stockholders  of  a
corporation  may  be  held  as  authorized  by  the  corporation's  articles  of
incorporation  or bylaws.  The Company Articles provide that special meetings of
the stockholders of the Company may only be called by the Chairman of the Board,
the President or the Board of Directors  pursuant to a resolution  approved by a
majority of the entire Board of Directors of the Company.

         Under the DGCL, a special meeting of stockholders  may be called by the
board of directors  or by any other  person  authorized  in the  certificate  of
incorporation  or the bylaws.  The Vessels By-laws provide that the President or
the Board of Directors may call special meetings of the stockholders of Vessels,
and that, upon request of not less than one-tenth of all  outstanding  shares of
entitled to vote at the meeting,  the president  shall call a special meeting of
stockholders.

Action Without a Meeting

         Under  the  Nevada  Statute,  unless  prohibited  by  the  articles  of
incorporation or the bylaws, any action to be taken by stockholders at a meeting
may be taken  without  a  meeting  if a  written  consent  thereto  is signed by
stockholders  holding at least a majority of the voting power,  except that if a
different  proportion  of  voting  power is  required  for such an  action  at a
meeting,  then that  proportion of written  consents is required.  The Company's
Articles  expressly  provide that actions of stockholders of the Company may not
be taken without a meeting.

         The DGCL provides that,  unless  otherwise  provided in a corporation's
certificate  of  incorporation,  any  action  that may be taken at a meeting  of
stockholders may be taken without a meeting,  without prior notice and without a
vote if the  holders of  outstanding  stock,  having  not less than the  minimum
number of votes that would be necessary to  authorized  such action,  consent in
writing.  The Vessels  Certificate permits action by consent of its stockholders
in accordance with the DGCL.

Mergers, Sales of Assets and Other Transactions

         Under  the  Nevada  Statute,  a merger  or  consolidation  in which the
corporation  is a  constituent  corporation  must be  approved  by the  board of
directors  and  by  the  holders  of a  majority  of  outstanding  stock  of the
corporation entitled to vote thereon, provided that no vote of stockholders of a
constituent  corporation  surviving a merger is required (unless the corporation
provides  otherwise  in its  certificate  of  incorporation)  if (a) the  merger
agreement  does not amend the existing  certificate of  incorporation,  (b) each
share of stock of the surviving corporation  outstanding before the merger is an
identical outstanding share after the merger and (c) the number of voting shares
outstanding  immediately  after the  merger,  plus the  number of voting  shares
issued as a result of the merger either by the  conversion of securities  issued
pursuant to the merger or the exercise of rights and warrants issued pursuant to
the  merger,  will not  exceed 20% of the total  number of voting  shares of the
surviving corporation outstanding immediately before the merger.

         Under the DGCL, a merger or consolidation in which the corporation is a
constituent  corporation  must be approved by the board of directors  and by the
holders of a majority of outstanding  stock of the corporation  entitled to vote

                                      114
<PAGE>

thereon,  provided that no vote of  stockholders  of a  constituent  corporation
surviving a merger is required (unless the corporation provides otherwise in its
certificate  of  incorporation)  if (a) the merger  agreement does not amend the
existing certificate of incorporation,  (b) each share of stock of the surviving
corporation  outstanding  before the merger is an  identical  outstanding  share
after the  merger  and (c)  either no  shares of common  stock of the  surviving
corporation and no shares, securities or obligations convertible into such stock
are to be  issued or  delivered  under the plan of  merger,  or the  authorized,
unissued  shares  or the  treasury  shares  of  common  stock  of the  surviving
corporation  to be issued or  delivered  under  the plan of  merger  plus  those
initially   issuable  upon  conversion  of  any  other  shares,   securities  or
obligations  to be issued or delivered  under such plan do not exceed 20% of the
shares of common stock of such constituent  corporation  outstanding immediately
prior to the effective date of the merger.

         Under the Nevada Statute and the DGCL, a corporation may sell, lease or
exchange all or substantially  all of its assets after such transaction has been
approved  by the  corporation's  board  of  directors  and by the  holders  of a
majority of the outstanding stock of the corporation entitled to vote thereon.

Provisions Affecting Business Combinations

         Section  203  of  the  DGCL  ("Section   203")   prohibits  a  Delaware
corporation  from  engaging  in a  "business  combination"  with an  "interested
stockholder"  for three years  following  the date that such  person  becomes an
interested stockholder.  With certain exceptions, an interested stockholder is a
person or group who or which owns 15% or more of the  corporation's  outstanding
voting  stock  (including  any rights to acquire  stock  pursuant  to an option,
warrant,  agreement,  arrangement  or  understanding,  or upon the  exercise  of
conversion  or exchange  rights,  and stock with respect to which the person has
voting rights only),  or is an affiliate or associate of the corporation and was
the owner of 15% or more of such voting  stock at any time  within the  previous
three years.

         For purposes of Section 203, the term "business combination" is defined
broadly to include mergers with or caused by the interested  stockholder;  sales
or other dispositions to the interested stockholder (except proportionately with
the  corporation's  other  stockholders)  of  assets  of  the  corporation  or a
subsidiary  equal to ten percent or more of the  aggregate  market  value of the
corporation's  consolidated  assets or its  outstanding  stock;  the issuance or
transfer by the  corporation or a subsidiary of stock of the corporation or such
subsidiary  to the  interested  stockholder  (except for certain  transfers in a
conversion or exchange or a pro rata distribution or certain other transactions,
none of which increase the interested  stockholders'  proportionate ownership of
any class or series of the corporation's or such subsidiary's stock); or receipt
by  the  interested  stockholder  (except  proportionately  as  a  stockholder),
directly or indirectly,  of any loans,  advances,  guarantees,  pledges or other
financial benefits provided by or through the corporation or a subsidiary.

         The three-year  moratorium imposed on business  combinations by Section
203 does not apply if: (i) prior to the date at which such  stockholder  becomes
an interested  stockholder  the board of directors  approves either the business
combination  or the  transaction  which  resulted  in  the  person  becoming  an
interested  stockholder;  (ii)  the  interested  stockholder  owns  85%  of  the
corporation's  voting stock upon  consummation of the transaction which made him
or her an interested  stockholder  (excluding  from the 85%  calculation  shares
owned by directors  who are also officers of the target  corporation  and shares
held  by  employee  stock  plans  which  do  not  permit   employees  to  decide
confidentially  whether  to accept a tender or  exchange  offer;  or (iii) on or
after the date such person becomes an interested stockholder, the board approves
the business  combination and it is also approved at a stockholder meeting by 66
2/3% of the voting stock not owned by the  interested  stockholder.  Section 203
does not apply if the business combination is proposed prior to the consummation
or abandonment of and  subsequent to the earlier of the public  announcement  or
the notice  required  under  Section 203 of the proposed  transaction  which (i)
constitutes   certain  (x)  mergers  or  consolidations,   (y)  sales  or  other
transactions of assets having an aggregate  market value equal to 50% or more of
the aggregate market value of all of the assets of the corporation determined on
a  consolidated  basis or the aggregate  market value of all of the  outstanding
stock of the  corporation or (z) proposed  tender or exchange  offers for 50% or
more of the corporation's  outstanding voting stock; (ii) is with or by a person
who was either not an interested  stockholder during the last three years or who
became an interested stockholder with the approval of the corporation's board of
directors;  and (iii) is  approved  or not  opposed by a  majority  of the board

                                      115
<PAGE>

members  elected prior to any person becoming an interested  stockholder  during
the previous three years (other their chosen successors).

         A Delaware corporation may elect not to be governed by Section 203 by a
provision of its original  certificate of incorporation or an amendment  thereto
or to the bylaws,  which amendment must be approved by majority stockholder vote
and may not be further  amended by the board of directors.  Such an amendment is
not effective until 12 months following its adoption.

         The Nevada Statute includes similar provisions (the "Nevada Combination
Provisions") prohibiting certain combinations with interested stockholders.  See
"Description  of Capital Stock --  Anti-takeover  Statutes."  The Nevada Statute
defines  "interested   stockholder"  similarly  to  the  DGCL,  except  that  an
interested  stockholder  is defined to be a person or group who owns 10% or more
of the  corporation's  outstanding  voting stock. The Nevada Statute defines the
term "combination" similarly to the DGCL, except that a combination is deemed to
occur when acquisitions of five percent or more of the aggregate market value of
the corporation's consolidated assets or its outstanding stock are consummated.

         Neither the Company  Articles  nor the Vessels  Certificate  contains a
provision  opting out of the coverage of the Nevada  Combination  Provisions  or
Section 203, respectively.

Appraisal Rights

         Under the Nevada  Statute,  a  stockholder  is entitled to dissent from
and, upon perfection of the  stockholder's  appraisal rights, to obtain the fair
value  of  his or her  shares  in the  event  of  certain  corporation  actions,
including  certain mergers and share  exchanges,  and any corporate action taken
pursuant  to a vote of the  stockholders  to the extent  that the  corporation's
articles of  incorporation,  bylaws or a  resolution  of the board of  directors
provides  that  voting or  nonvoting  stockholders  are  entitled to dissent and
obtain  payment for their  shares.  See "The Merger -- The Merger  Agreement  --
Appraisal Rights" and "Appraisal Rights."

         Under the DGCL, a stockholder  of a constituent  corporation in certain
mergers or  consolidations  may,  under  varying  circumstances,  be entitled to
appraisal  rights  pursuant  to which such  stockholder  shall be entitled to an
appraisal  of the fair  value of his shares of stock.  Appraisal  rights are not
available (a) with respect to the shares or depository receipts which are either
listed on a national securities exchange, designated as a national market system
security on an  interdealer  quotation  system by the  National  Association  of
Securities  Dealers,  Inc. (the "NASD") or are held of record by more than 2,000
holders if such  stockholders  receive only share or depository  receipts of the
surviving  corporation or shares or depository receipts of any other corporation
which are  either  listed on a national  securities  exchange,  designated  as a
national market system security on an interdealer  quotation  system by the NASD
or held of record by more than 2,000  holders,  plus cash in lieu of  fractional
shares, or (b) to stockholders of a corporation surviving a merger if no vote of
the stockholders of the surviving corporation is required to approve the merger.

                                      116
<PAGE>



Dividends and Stock Repurchase and Redemption

         The Nevada Statute  provides that a corporation  may, unless  otherwise
restricted by its articles of incorporation, authorize and make distributions to
its stockholders.  No distributions may be made if, after giving it effect:  (i)
the corporation  would not be able to repay its debts as they become due or (ii)
the  corporation's  total  assets  would  be  less  than  the  sum of its  total
liabilities  plus  the  amount  needed  to  satisfy   preferential  rights  upon
dissolution  of  stockholders  whose  preferential  rights are superior to those
receiving the distribution if, at the time of the distribution,  the corporation
is to be dissolved.

         The DGCL  permits a  corporation  to declare and pay  dividends  out of
statutory surplus or, if there is no surplus,  out of net profits for the fiscal
year in which the dividend is declared  and/or for the preceding  fiscal year as
long as the amount of capital of the  corporation  following the declaration and
payment of the  dividend  is not less than the  aggregate  amount of the capital
represented  by the  issued  and  outstanding  stock  of all  classes  having  a
preference  upon the  distribution  of assets.  In addition,  the DGCL generally
provides  that a corporation  may redeem or  repurchase  its shares only if such
redemption or repurchase  would not impair the capital of the  corporation.  The
ability of a Delaware corporation to pay dividends on, or to make repurchases or
redemptions  of,  its  shares  is  dependent  on  the  financial  status  of the
corporation standing alone and not on a consolidated basis.

Dissolution

         The Nevada Statute provides that voluntary  dissolution occurs upon the
recommendation  by the board of directors to the stockholders of the corporation
and the  affirmative  vote of the  holders  of a  majority  of the  stockholders
entitled to vote thereon.

         Under the DGCL,  voluntary  dissolution  of a corporation  requires the
adoption  of a  resolution  by a  majority  of the  board of  directors  and the
affirmative  vote of a  majority  of the  outstanding  shares  entitled  to vote
thereon,  together with a majority vote of the outstanding  shares of each class
or series  entitled  to vote as a class.  Alternatively,  the DGCL  permits  the
voluntary  dissolution  of a  corporation  without the  approval of the board of
directors pursuant to the written consent of all stockholders.

         THE  FOREGOING  DOES NOT  PURPORT TO BE A COMPLETE  DESCRIPTION  OF THE
DIFFERENCES BETWEEN THE NEVADA AND DELAWARE CORPORATE LAWS. SUCH DIFFERENCES CAN
BE DETERMINED BY FULL  REFERENCE TO THE NEVADA  STATUTE AND THE DGCL, THE COMMON
LAW UNDER EACH OF SUCH  JURISDICTIONS,  THE  ARTICLES OF  INCORPORATION  AND THE
BY-LAWS OF THE  COMPANY  AND THE  CERTIFICATE  OF  INCORPORATION  AND BY-LAWS OF
VESSELS.

                                      117
<PAGE>


                                  LEGAL MATTERS

         Certain legal matters related to the shares of the Abraxas Common Stock
offered  hereby are being  passed upon for Abraxas by Cox & Smith  Incorporated,
San Antonio,  Texas. Certain legal matters in connection with the Merger will be
passed  upon by Cox &  Smith  Incorporated,  San  Antonio,  Texas  and by King &
Spalding, Houston, Texas.

                                     EXPERTS

         The consolidated  financial statements of Abraxas Petroleum Corporation
as of  December  31, 1996 and 1995 and for each of the three years in the period
ended  December 31, 1996 and the statements of Combined Oil and Gas Revenues and
Direct  Operating  Expenses  of  Certain  Overriding  Royalty  Interests  in the
Portilla Field  Acquired by Abraxas  Petroleum  Corporation  for the years ended
December 31, 1994 and 1995 included in the Proxy Statement of Abraxas  Petroleum
Corporation  which  is  referred  to and made a part of the  Prospectus  and the
Registration  Statement  have been  audited  by Ernst & Young  LLP,  independent
auditors,  as set forth in their reports  appearing  elsewhere  herein,  and are
included in reliance  upon such reports given upon the authority of such firm as
experts in accounting and auditing.

         The  Statements  of Revenues and Direct  Operating  Expenses of Enserch
Exploration,  Inc.'s  Wamsutter  Area Package for the three years ended December
31, 1995,  1994 and 1993  included in the Proxy  Statement of Abraxas  Petroleum
Corporation  which  is  referred  to and made a part of the  Prospectus  and the
Registration Statement,  have been audited by Deloitte & Touche LLP, independent
auditors, as stated in their report appearing elsewhere herein, and are included
in reliance upon such report given upon the authority of such firm as experts in
accounting and auditing.

         The financial  statements of CGGS Canadian Gas Gathering Systems,  Inc.
as of October 31, 1996 and 1995 and for the years ended  October 31, 1996,  1995
and 1994 have been included herein and in the Registration Statement in reliance
upon the report of KPMG, Chartered Accountants,  appearing elsewhere herein, and
upon the authority of said firm as experts in accounting and auditing.

         The  consolidated  financial  statements  of  Vessels  Energy,  Inc and
subsidiaries for the years then ended included in the Proxy Statement of Abraxas
Petroleum Corporation which is referred to and made a part of the Prospectus and
the Registration Statement have been audited by Arthur Andersen LLP, independent
public  accountants,  as  indicated  in their  report  dated  April 9, 1997 with
respect thereto,  and are included herein in reliance upon the authority of said
firm as experts in giving said report.

         The consolidated statements of operations,  cash flows and stockholders
equity of Vessels Energy,  Inc. and subsidiaries for the year ended December 31,
1994  included  in this  Prospectus  have been so  included  in  reliance on the
reports of Price Waterhouse LLP, independent accountants, given on the authority
of said firm as experts in auditing and accounting.

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

                             STOCKHOLDERS' PROPOSALS

         If the Merger is consummated,  it is presently anticipated that Abraxas
will  hold  its  annual  meeting  of  stockholders  on or  about  May 22,  1998.
Stockholder proposals intended to be presented at that meeting must be submitted
in accordance with the notice  requirements  set forth in the Company's  By-Laws
for  consideration  by the Company for possible  inclusion in the proxy material
for that meeting.

                                      118
<PAGE>

                                GLOSSARY OF TERMS

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

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

         "Bbl" means barrel or barrels.

         "Bblpd" means barrels per day.

         "Bcf" means billion cubic feet.

         "BOE" means barrel of crude oil equivalent.

         "BOPD" means barrel of crude oil per day.

         "C$" means Canadian dollars.

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

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

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

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

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

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

         "G&A" means general and administrative.

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

         "LOE" means lease operating expenses and production taxes.

         "MBbl" means thousand barrels.

         "MBOE" means thousand barrels of crude oil equivalent.

         "Mcf" means thousand cubic feet.

         "Mcfpd" means thousand cubic feet per day.

                                      119
<PAGE>

         "MMBbls" means million barrels of crude oil.

         "MMBOE" means million barrels of crude oil equivalent.

         "MMBTU" means million British Thermal Units.

         "MMcf" means million cubic feet.

         "MMcfpd" means million cubic feet per day.

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

         "NGL" means natural gas liquid.

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

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

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

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

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

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

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

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

                                      120
<PAGE>

<PAGE>





                          INDEX TO FINANCIAL STATEMENTS

                                                                          Page
Abraxas Petroleum Corporation and Subsidiaries

Report of Independent Auditors .............................................F-2
Consolidated Balance Sheets at December 31, 1995 and 1996 and
   September 30, 1997 (Unaudited) ..........................................F-3
Consolidated Statements of Operations for the years ended
   December 31, 1994, 1995,and 1996 and for the nine months
   ended September 30, 1996 and 1997 (Unaudited) ...........................F-5
Consolidated Statements of Shareholders' Equity for the years
   ended December 31, 1994, 1995, and 1996 and for the nine months
   ended September 30, 1997 (Unaudited).....................................F-7
Consolidated Statements of Cash Flows for the years ended
   December 31, 1994, 1995,and 1996 and for the nine months
   ended September 30, 1996 and 1997 (Unaudited)............................F-9
Notes to Consolidated Financial Statements .................................F-11

CGGS Canadian Gas Gathering Systems Inc.

Auditors' Report to the Directors ..........................................F-39
Balance Sheets at October 31, 1995 and 1996 ................................F-40
Statements of Earnings (Loss) and Deficit for the years ended
   October 31, 1994,1995, and 1996 .........................................F-41
Statements of Changes in Financial Position for the years ended
   October 31, 1994, 1995, and 1996 ........................................F-42
Notes to Financial Statements ..............................................F-43

Enserch Exploration, Inc.'s Wamsutter Area Package

Independent Auditors' Report ...............................................F-50
Statements of Revenues and Direct Operating Expenses for the years ended
   December 31, 1993, 1994, and 1995 and for the nine months ended
   September 30, 1995 and 1996 (Unaudited) .................................F-51
Notes to Statements of Revenues and Direct Operating Expenses ..............F-52

Certain Overriding Royalty Interests in the Portilla Field Acquired by
   Abraxas Petroleum Corporation

Report of Independent Auditors .............................................F-54
Statements of Combined Oil and Gas Revenues and Direct Operating Expenses
   for the years ended December 31, 1994 and 1995 and
   for the nine months ended September 30, 1995 and 1996 (Unaudited) .......F-55
Notes to Statements of Combined Oil and Gas Revenues and
   Direct Operating Expenses ...............................................F-56

Vessels Energy, Inc.

Report of Independent Public Accountants ...................................F-60
Report of Independent Accountants ..........................................F-61
Consolidated Balance Sheets as of December 31, 1995 and 1996
   and September 30, 1997 (Unaudited) ......................................F-62
Consolidated Statements of Operations for the years ended
   December 31, 1994, 1995, and 1996 and for the nine months
   ended September 30, 1996 and 1997 (Unaudited) ...........................F-64
Consolidated Statements of Cash Flows for the years ended
   December 31, 1994, 1995, and 1996 and for the nine months ended
   September 30, 1996 and 1997 (Unaudited) .................................F-65
Consolidated Statements of Stockholders' Equity for the years ended
   December 31, 1994,1995, and 1996, and for the nine months ended
   September 30, 1997 (Unaudited) ..........................................F-67
Notes to Consolidated Financial Statements .................................F-68


<PAGE>










                         Report of Independent Auditors



The Board of Directors and Shareholders
Abraxas Petroleum Corporation

         We have audited the accompanying consolidated balance sheets of Abraxas
Petroleum Corporation and Subsidiaries as of December 31, 1995 and 1996, and the
related consolidated  statements of operations,  shareholders'  equity, and cash
flows for each of the three years in the period ended  December 31, 1996.  These
financial  statements are the  responsibility of the Company's  management.  Our
responsibility  is to express an opinion on these financial  statements based on
our audits.

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

         In our opinion,  the  financial  statements  referred to above  present
fairly, in all material respects, the consolidated financial position of Abraxas
Petroleum  Corporation  and  Subsidiaries at December 31, 1995 and 1996, and the
consolidated  results of their  operations  and their cash flows for each of the
three years in the period ended December 31, 1996, in conformity  with generally
accepted accounting principles.



                                                              ERNST & YOUNG LLP

San Antonio, Texas
March 21, 1997


                                      F-2
<PAGE>
<TABLE>
<CAPTION>


                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

                           CONSOLIDATED BALANCE SHEETS


                                     ASSETS


                                                         December 31      
                                                     -------------------- September 30
                                                        1995       1996      1997
                                                     ---------   -------- ------------
                                                       (In thousands)     (Unaudited)

<S>                                                   <C>        <C>        <C>       
Current assets:
   Cash ...........................................   $  4,250   $  8,290   $    7,559
   Accounts receivable, less allowance for
     doubtful accounts:
       Joint owners ...............................      1,335      1,601        2,067
       Oil and gas production sales ...............      2,946     11,400        8,164
       Affiliates, officers, and shareholders .....         53         94         --
       Other ......................................         60      1,289          749
                                                      --------   --------   ----------
                                                         4,394     14,384       10,980

   Equipment inventory ............................         80        451          430
   Other current assets ...........................        125        187          205
                                                      --------   --------   ----------
     Total current assets .........................      8,849     23,312       19,174

Property and equipment ............................    104,997    310,043      346,459
Less accumulated depreciation, depletion, and
   amortization ...................................     29,919     38,653       58,250
                                                      --------   --------   ----------
   Net property and equipment  based on the full
     cost method of accounting for oil and gas
     properties  of which $-0- and $37,268 at
     December 31, 1995 and 1996, respectively, were
     excluded from amortization ...................     75,078    271,390      288,209
Deferred financing fees, net of accumulated
   amortization of $289 and $280 at December 31,
   1995 and 1996, respectively ....................        354      9,335        8,432
Restricted cash ...................................        134         90           90
Marketable securities .............................        326       --           --
Other assets ......................................        326        715        1,277
                                                      ========   ========   ==========
   Total assets ...................................   $ 85,067   $304,842   $  317,182
                                                      ========   ========   ==========


</TABLE>


                             See accompanying notes.

                                      F-3
<PAGE>

<TABLE>
<CAPTION>

                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

                     CONSOLIDATED BALANCE SHEETS (CONTINUED)


                      LIABILITIES AND SHAREHOLDERS' EQUITY

                                                          December 31                 
                                                   ---------------------------   September 30
                                                       1995           1996           1997
                                                   ------------   ------------   ------------
                                                        (In thousands)            (Unaudited)
<S>                                                 <C>            <C>            <C> 
Current liabilities:
   Accounts payable .............................   $     3,929    $     9,960    $    14,246
   Oil and gas production payable ...............         1,787          2,378          2,410
   Accrued interest .............................           363          3,206         10,392
   Income taxes payable .........................          --              145            145
   Other accrued expenses .......................            46          1,132          1,638
   Dividends payable on preferred stock .........            91           --             --
   Payable to affiliates ........................          --               58           --
                                                    -----------    -----------    -----------
     Total current liabilities ..................         6,216         16,879         28,831

Long-term debt:
   Senior notes .................................          --          215,000        215,000
   Financing agreements .........................        41,557           --             --
   Other ........................................            44             32          2,330
                                                    -----------    -----------    -----------
                                                         41,601        215,032        217,330

Other long-term obligations .....................          --               87            243
Deferred income taxes ...........................           187         32,928         32,024
Minority interest in foreign subsidiary .........          --            2,157          4,380
Future site restoration .........................          --            2,103          2,248

Commitments and contingencies

Shareholders' equity:
   Preferred  stock 8%,  authorized .............     1,000,000
   shares;  issued and  outstanding 45,741 shares
   at December 31, 1995 and 1996 and $-0- at
     September 30, 1997 .........................          --             --             --
   Common stock, par value $.01 per share -
     authorized 50,000,000 shares; issued
     5,799,762, 5,806,812, and 6,324,730 shares
     at December 31, 1995 and 1996 and
     September 30, 1997, respectively ...........            58             58             63
   Additional paid-in capital ...................        50,914         50,926         51,119
   Unrealized holding loss on securities ........          (244)          --             --
   Accumulated deficit ..........................       (13,664)       (12,517)       (15,298)
   Treasury stock, at cost, 2,571, 74,711, and
     53,023 shares at December 31, 1995 and 1996
     and September 30, 1997, respectively .......            (1)          (405)          (281)
   Foreign currency translation adjustment ......          --           (2,406)        (3,477)
                                                    -----------    -----------    -----------
     Total shareholders' equity .................        37,063         35,656         32,126
                                                    -----------    -----------    -----------
     Total liabilities and shareholders' equity .   $    85,067    $   304,842    $   317,182
                                                    ===========    ===========    ===========
</TABLE>

                             See accompanying notes.

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


                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF OPERATIONS


                                                                             Nine Months Ended                   
                                              Year Ended December 31           September 30
                                        --------------------------------    --------------------
                                          1994        1995        1996        1996        1997
                                        --------    --------    --------    --------    --------    
                                                                                (Unaudited)
                                            (In thousands except shares and per share data)             

<S>                                     <C>         <C>         <C>         <C>         <C>     
Revenue:
   Oil and gas production revenues ..   $ 11,114    $ 13,660    $ 25,749    $ 11,275    $ 46,920
   Gas processing revenues ..........       --          --           600        --         2,793
   Rig revenues .....................        161         108         139         106         250
   Other ............................         74          49         165          17         728
                                        --------    --------    --------    --------    --------
                                          11,349      13,817      26,653      11,398      50,691

Operating costs and expenses:
   Lease operating and production ...      3,693       4,333       5,858       3,295      10,604
     taxes
   Gas processing costs .............       --          --           262        --         1,191
   Depreciation, depletion, and
     amortization ...................      3,790       5,434       9,605       4,145      19,780
   Rig operations ...................        133         125         169         113         214
   General and administrative .......        810       1,042       1,933       1,250       3,119
                                        --------    --------    --------    --------    --------
                                           8,426      10,934      17,827       8,803      34,908
                                        --------    --------    --------    --------    --------
Operating income ....................      2,923       2,883       8,826       2,595      15,783

Other (income) expense:
   Interest income ..................        (16)        (34)       (254)       (155)       (438)
   Amortization of deferred financing        400         214         280         192         933
     fees
   Interest expense .................      2,359       3,911       6,241       2,142      18,757
   Loss on marketable securities ....       --          --           235         235        --
   Other expense ....................         67        --           138        --           115
                                        --------    --------    --------    --------    --------
                                           2,810       4,091       6,640       2,414      19,367
                                        --------    --------    --------    --------    --------
Income (loss) from continuing
   operations before taxes and ......        113      (1,208)      2,186         181      (3,584)
   extraordinary items
Income tax expense (benefit):
   Current ..........................       --          --           176        --           156
   Deferred .........................       --          --          --          --        (1,227)
Minority interest in income of
   consolidated foreign subsidiary ..       --          --            70          58          85
                                        --------    --------    --------    --------    --------
Income (loss) from continuing
   operations before extraordinary
     items ..........................        113      (1,208)      1,940         123      (2,598)


</TABLE>

                                      F-5

<PAGE>
<TABLE>
<CAPTION>


                                       ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

                                      CONSOLIDATED STATEMENTS OF OPERATIONS (CONTINUED)

                                                              
                                                                            Nine Months Ended                   
                                              Year Ended December 31           September 30
                                        --------------------------------    --------------------
                                          1994        1995        1996        1996        1997
                                        --------    --------    --------    --------    --------    
                                                                                (Unaudited)
                                            (In thousands except shares and per share data)             
<S>                                     <C>         <C>         <C>         <C>         <C> 
Discontinued operations:
   Loss from operations of
     discontinued coal properties ...   $   (348)   $   --      $   --      $   --      $   --
   Loss on disposal of discontinued
     coal properties ................       (988)       --          --          --          --
                                        ---------   ---------   ---------   ---------   ---------
Loss from discontinued operations ...     (1,336)       --          --          --          --
                                        ---------   ---------   ---------   ---------   ---------
Income (loss) before extraordinary ..     (1,223)     (1,208)      1,940         123      (2,598)
   items
Extraordinary item:
   Debt extinguishment costs ........     (1,172)       --          (427)        369        --
                                        --------    --------    --------    --------    ---------
Net income (loss) ...................     (2,395)     (1,208)      1,513        (246)     (2,598)
Less dividend requirement on
   cumulative preferred stock .......       (183)       (366)       (366)       (274)       (183)
                                        ---------   ---------   ---------   ---------   ---------
Net income (loss) applicable to
   common stock .....................   $ (2,578)   $ (1,574)   $  1,147    $   (520)   $ (2,781)
                                        =========   =========   =========   =========   =========

Earnings per common and common
  equivalent share:
     Income (loss) from continuing
       operations ...................   $   (.02)   $   (.34)   $    .23    $   (.03)   $   (.47)
     Discontinued operations ........       (.31)       --          --          --          --
     Extraordinary items ............       (.27)       --          (.06)       (.06)       --
                                        ---------   ---------   ---------   ---------   ---------
   Net income (loss) per share ......   $   (.60)   $   (.34)   $    .17    $   (.09)   $   (.47)
                                        =========   =========   =========   =========   =========
Weighted average shares outstanding .   4,309,878   4,635,412   6,794,442   5,804,145   5,920,135
                                        =========   =========   =========   =========   =========


</TABLE>
                                      

                             See accompanying notes.

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


                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

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


                                                                                                       
                                   Preferred Stock           Common Stock          Treasury Stock           
                               -----------------------    ------------------    ---------------------
                                Shares       Amount       Shares     Amount      Shares      Amount      
                               -----------   ---------    ---------  -------    --------   ----------
<S>                                <C>        <C>         <C>        <C>           <C>      <C>   
Balance at January 1, 1994 .          --      $   --      4,202,449  $   42         --      $      --   
   Issuance of common stock
     for compensation ......          --          --         10,033      --         --             --   
   Issuance of preferred
     stock for acquisition .        45,741       4,573         --        --         --             --   
   Options and warrants ....          --          --        249,408       3         --             --   
     exercised
   Changes in unrealized
     holding loss on .......          --          --           --        --         --             --   
     securities
   Dividend on preferred ...          --          --           --        --         --             --   
     stock
   Net loss for the year ...          --          --           --        --         --             --   
                                -----------  ---------   ----------  -------     -------    ----------   
Balance at December 31, 1994        45,741       4,573    4,461,890      45         --             --   
   Issuance of common stock
     for compensation ......          --          --          7,872      --         --             --   
   Issuance of common stock           --          --      1,330,000      13         --             --   
   Treasury stock ..........          --          --           --        --        2,571           (1)
     purchased, net
   Changes in preferred
     stock par value .......          --        (4,573)        --        --         --             --   
   Dividend on preferred ...          --          --           --        --         --             --   
     stock
 Net loss for the year .....          --          --           --        --         --             --   
                                -----------  ---------   ----------  -------     -------    ---------- 
Balance at December 31, 1995        45,741        --      5,799,762      58        2,571           (1)

   Issuance of common stock
     for compensation ......          --          --          5,050      --       (2,500)           1               

   Expenses paid related to
     private placement .....          --          --           --        --         --             --   
     offering
   Options exercised .......          --          --          2,000      --         --             --   
   Treasury stock purchased           --          --           --        --       74,640         (405)
   Dividend on preferred ...          --          --           --        --         --             --   
     stock
   Foreign currency
     translation adjustment           --          --           --        --         --             --   
   Changes in unrealized
     holding loss on .......          --          --           --        --         --             --   
     securities
   Net income for the year .          --          --           --        --         --             --   

                                      F-7
</TABLE>

<PAGE>
<TABLE>
<CAPTION>


                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

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

                              Additional     Unrealized                   Foreign
                               Paid-In     Holding Loss   Accumulated     Currency
                               Capital     on Securities    Deficit     Translation      Total
                              -----------  -------------  -----------   -----------    -------------
<S>                           <C>          <C>           <C>            <C>            <C>        
Balance at January 1, 1994 .  $    34,614  $     --      $    (9,513)   $      --      $    25,143
   Issuance of common stock
     for compensation ......         107         --             --             --              107
   Issuance of preferred
     stock for acquisition .        --           --             --             --            4,573
   Options and warrants ....       1,496         --             --             --            1,499
     exercised
   Changes in unrealized
     holding loss on .......        --          (244)          --             --             (244)
     securities
   Dividend on preferred ...        --          --             (183)          --             (183)
     stock
   Net loss for the year ...        --          --           (2,394)          --           (2,394)
                              -----------  -------------  -----------   -----------    -------------                               
Balance at December 31, 1994      36,217        (244)       (12,090)          --           28,501
   Issuance of common stock
     for compensation ......          74        --             --             --               74
   Issuance of common stock       10,050        --             --             --           10,063
   Treasury stock ..........        --          --             --             --               (1)
     purchased, net
   Changes in preferred
     stock par value .......       4,573        --             --             --             --
   Dividend on preferred ...        --          --             (366)          --             (366)
     stock
   Net loss for the year ...        --          --           (1,208)          --           (1,208)
                              -----------  -------------  -----------   -----------    -------------                               
Balance at December 31, 1995      50,914        (244)       (13,664)          --           37,063
   Issuance of common stock
     for compensation ......          41        --              --            --               42
   Expenses paid related to
     private placement .....         (42)       --             --             --              (42)
     offering
   Options exercised .......          13        --             --             --               13
   Treasury stock purchased         --          --             --             --             (405)
   Dividend on preferred ...        --          --             (366)          --             (366)
     stock
   Foreign currency
     translation adjustment         --          --             --           (2,406)        (2,406)
   Changes in unrealized
     holding loss on .......        --           244           --             --              244
     securities
   Net income for the year .        --          --            1,513           --            1,513
                              -----------  -------------  -----------   -----------    -------------

</TABLE>
                      
                             See accompanying notes

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


                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

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


                                                                                                       
                                   Preferred Stock           Common Stock            Treasury Stock           
                               -----------------------    ----------------------   -------------------
                                Shares       Amount        Shares       Amount      Shares     Amount      
                              -----------  -----------    ---------   ----------   --------   --------                          

  
<S>                              <C>        <C>           <C>         <C>          <C>         <C>      
Balance at December 31, 1996      45,741    $    --       5,806,812   $      58      74,711    $ (405)

   Issuance of common stock
     for compensation ......        --           --           7,735        --       (21,688)      124
     (Unaudited)
   Options exercised .......        --           --           2,000        --          --         --   
     (Unaudited)
   Dividend on preferred
     stock (Unaudited) .....        --           --            --          --          --         --   
   Conversion of preferred
     stock (Unaudited) .....     (45,741)        --         508,183           5        --         --   
   Foreign currency
     translation adjustment         --           --            --          --          --         --   
     (Unaudited)
   Net loss for the period .        --           --            --          --          --         --   
     (Unaudited)
                              -----------  -------------  ----------- ----------    --------   -------
Balance at September 30,
   1997 (Unaudited) ........        --      $    --       6,324,730   $      63      53,023    $ (281)
                              -----------  -------------  ----------- ----------    --------   -------

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


                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

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

                              Additional     Unrealized                   Foreign
                               Paid-In     Holding Loss   Accumulated     Currency
                               Capital     on Securities    Deficit     Translation      Total
                              -----------  -------------  -----------   -----------    ---------
<S>                            <C>          <C>           <C>         <C>              <C>     
Balance at December 31, 1996   $  50,926    $      --     $ (12,517)  $  (2,406)       $ 35,656

   Issuance of common stock
     for compensation ......         186           --          --           --              310
     (Unaudited)
   Options exercised .......          11           --          --           --               11
     (Unaudited)
   Dividend on preferred
     stock (Unaudited) .....        --             --          (183)        --             (183)
   Conversion of preferred
     stock (Unaudited) .....          (4)          --          --           --                1
   Foreign currency
     translation adjustment         --             --          --         (1,071)        (1,071)
     (Unaudited)
   Net loss for the period .        --             --        (2,598)        --           (2,598)
     (Unaudited)
                              -----------  -------------  -----------   -----------    ---------
Balance at September 30,
   1997 (Unaudited) ........   $  51,119    $      --     $ (15,298)   $  (3,477)     $  32,126
                              ===========  =============  ===========   ===========    =========

</TABLE>
                               

                             See accompanying notes.
                                      F-8a
<PAGE>
<TABLE>
<CAPTION>



                                                                                 
                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF CASH FLOWS


                                                                                 Nine Months Ended
                                               Year Ended December 31               September 30
                                          ---------------------------------    -----------------------
                                           1994         1995        1996          1996         1997
                                        ----------   ----------   ---------    ----------   ----------
                                                   (In thousands)                    (Unaudited)
<S>                                     <C>          <C>          <C>          <C>          <C>      
Operating Activities
Net income (loss) ...................   $  (2,395)   $  (1,208)   $   1,513    $    (246)   $  (2,598)
Adjustments to reconcile net income
   (loss) to net cash provided by
   operating activities:
     Minority interest in income of
       foreign subsidiary ...........        --           --             70           58           85
     Loss on disposal of discontinued
       operations ...................         987         --           --           --           --
     Depreciation, depletion, and
       amortization .................       3,790        5,434        9,605        4,145       19,780
     Amortization of deferred
       financing fees ...............         467          214          280          561          933
     Issuance of common stock for
       compensation .................         107           74           42         --            310
     Decrease in deferred tax asset .        --           --           --           --         (1,227)
     Loss on marketable securities ..        --           --            235         --           --
     Net loss from debt .............       1,172         --            427         --           --
       restructurings
     Changes in operating assets
       and liabilities:
         Accounts receivable ........        (814)        (807)      (6,013)         103        3,404
         Equipment inventory ........          (9)         (29)         (82)         (62)          21
         Other assets ...............         (74)           2         (133)         (14)         (18)
         Accounts payable, accrued
           expenses, and dividends
           payable ..................       1,232          (79)       7,009          713       11,920
         Oil and gas production
           payable ..................         (62)         919          591         (373)          32
                                        ---------    ---------    ---------    ---------    ---------
Net cash provided by operating
   activities .......................       4,401        4,520       13,544        4,885       32,642

Investing Activities
Capital expenditures, including
   purchases and development of
   properties .......................     (36,444)     (12,330)     (87,793)     (55,489)     (44,604)
Payment for purchase of CGGS,
   net of cash acquired .............        --           --        (85,362)        --           --
Proceeds from sale of oil and gas
   properties and equipment inventory          70        2,556          242       16,794        8,978
Purchase of interest in real estate
   partnership ......................        --           (311)        --         (2,425)        --
Proceeds from sale of marketable
   securities .......................        --           --            335         --           --
Sale of common stock in Castle
   Minerals .........................         371         --           --           --           --
                                         ---------    ---------    ---------    ---------    ---------
Net cash used in investing
   activities .......................     (36,003)     (10,085)    (172,578)     (41,120)     (35,626)

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


                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

                CONSOLIDATED STATEMENTS OF CASH FLOWS (CONTINUED)


                                                                                 Nine Months Ended
                                               Year Ended December 31               September 30
                                          ---------------------------------    -----------------------
                                           1994         1995        1996          1996         1997
                                        ----------   ----------   ---------    ----------   ----------
                                                   (In thousands)                    (Unaudited)
<S>                                     <C>          <C>          <C>          <C>          <C>  
Financing Activities
Preferred stock dividends ...........   $     (91)   $    (366)   $    (366)   $    (274)   $    (182)
Issuance of common stock, net of
   expenses .........................       1,499       10,063          (29)          30           11
Purchase of treasury stock, net .....        --             (1)        (405)        (372)        --
Proceeds from long-term borrowings ..      40,906        5,950      305,400       90,400        2,298
Payments on long-term borrowings ....     (12,659)      (5,646)    (131,969)     (46,957)        --
Deferred financing fees .............        (451)        (186)      (9,688)        (779)         (30)
Other ...............................        --           --             87         (113)         156
                                        ---------    ---------    ---------    ---------    ---------
Net cash provided by financing
   activities .......................      29,204        9,814      163,030       41,935        2,253
                                        ---------    ---------    ---------    ---------    ---------
Increase (decrease) in cash .........      (2,398)       4,249        3,996        5,700         (731)
Cash at beginning of year ...........       2,533          135        4,384        4,384        8,380

                                        ---------    ---------    ---------    ---------    ---------
Cash at end of year, including
   restricted cash ..................   $     135    $   4,384    $   8,380    $  10,084    $   7,649
                                        =========    =========    =========    =========    =========

Supplemental Disclosures
Supplemental disclosures of cash
   flow information:
     Interest paid ..................   $   2,150    $   3,884    $   3,863    $   2,142    $  12,594
                                        =========    =========    =========    =========    =========

</TABLE>
<TABLE>
<CAPTION>

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

     During 1994, the Company issued  $4,574,000 of preferred  stock in exchange
       for oil and gas producing properties.



                             See accompanying notes.

                                      F-10
<PAGE>


                 ABRAXAS PETROLEUM CORPORATION AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

                        December 31, 1994, 1995, and 1996
                (Information as to September 30, 1997 and for the
           nine months ended September 30, 1996 and 1997 is unaudited)


1.  Organization and Significant Accounting Policies

Nature of Operations

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

         The accompanying  unaudited interim  consolidated  financial statements
include all adjustments,  consisting of only normal recurring adjustments, that,
in the opinion of  management,  are  necessary to present  fairly the  financial
position as of September 30, 1997 and the results of  operations  and cash flows
for the nine months ended  September 30, 1996 and 1997. The results for the nine
months ended September 30, 1997 are not necessarily indicative of the results to
be expected for the full year.  Information as of September 30, 1997 and for the
nine months ended  September 30, 1996 and 1997, as well as disclosures of events
occurring after March 1997 are unaudited.

Use of Estimates

         The  preparation of financial  statements in conformity  with generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that  affect the  reported  amounts of assets and  liabilities  and
disclosure of  contingent  assets and  liabilities  at the date of the financial
statements  and the  reported  amounts  of  revenues  and  expenses  during  the
reporting period. Actual results could differ from those estimates.

Marketable Securities

         Management  determines  the  appropriate  classification  of marketable
equity  and  debt  securities  at the  time of  purchase  and  reevaluates  such
designation as of each balance sheet date.  Debt securities that the Company has
both the  positive  intent  and  ability  to hold to  maturity  are  carried  at
amortized  cost.  Debt  securities  that the Company  does not have the positive
intent and ability to hold to maturity and all marketable  equity securities are
classified  as   available-for-sale  or  trading  and  carried  at  fair  value.
Unrealized   holding   gains   and   losses   on   securities    classified   as
available-for-sale  are carried as a separate component of shareholders' equity.
Unrealized  holding  gains and losses on  securities  classified  as trading are
reported in earnings.

Concentration of Credit Risk

         Financial  instruments which  potentially  expose the Company to credit
risk consist  principally of trade receivables,  interest rate and crude oil and
natural  gas price swap  agreements.  Accounts  receivable  are  generally  from
companies  with  significant  oil  and gas  marketing  activities.  The  Company
performs ongoing credit evaluations and, generally,  requires no collateral from
its   customers.   For  further   information   regarding  the  Company's   swap
arrangements, see Notes 6 and 16.

                                      F-11
<PAGE>


Equipment Inventory

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

Oil and Gas Properties

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

         Unevaluated  properties not currently being  amortized  included in oil
and gas  properties  were $-0- and  $37,268,000  at December  31, 1995 and 1996,
respectively.   The  properties  represented  by  these  costs  were  undergoing
exploration  activities  or are  properties  on which  the  Company  intends  to
commence  activities in the future.  The Company  believes that the  unevaluated
properties  at  December  31,  1996 will be  substantially  evaluated  in six to
thirty-six months and it will begin to amortize these costs at such time.

Other Property and Equipment

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

Stock-Based Compensation

         Statement of Financial  Accounting  Standards No. 123,  "Accounting for
Stock-Based Compensation," encourages, but does not require, companies to record
compensation cost for stock-based employee compensation plans at fair value. The
Company has chosen to continue to account for stock-based compensation using the
intrinsic value method prescribed in Accounting Principles Board Opinion No. 25,
"Accounting  for  Stock  Issued  to  Employees,"  and  related  interpretations.
Accordingly,  compensation  cost for stock options is measured as the excess, if
any, of the quoted market price of the Company's  stock at the date of the grant
over the amount an employee must pay to acquire the stock (see Note 8).

Foreign Currency Translation

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


                                      F-12
<PAGE>


Fair Value of Financial Instruments

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

Restoration, Removal and Environmental Liabilities

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

Revenue Recognition

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

Deferred Financing Fees

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

Federal Income Taxes

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

Net Income (Loss) Per Common Share

         Net income  (loss) per common  share is computed by dividing net income
(loss)  (adjusted  for  dividends  on preferred  stock) by the weighted  average
number of shares of common and common equivalent shares  outstanding  during the
period.  The  weighted  average  number of common and common  equivalent  shares
includes the number of shares that would be issuable under the Contingent  Value
Rights Agreement (CVR  Agreement),  if the current market value of the Company's
common  stock at year-end is less than a  specified  target  price (see Note 7).
Common stock equivalents, including any shares issuable under the CVR Agreement,
are not considered in the computation of periods with a loss, as their effect is
anti-dilutive.

Reclassifications

         Certain  balances  for  1994  and  1995  have  been   reclassified  for
comparative purposes.


                                      F-13
<PAGE>


2.  Acquisitions and Divestitures

Wyoming Properties Acquisition

         On  September  30,  1996,  the Company  acquired  interests  in certain
producing crude oil and natural gas properties  located in the Wamsutter area of
southwestern Wyoming (the Wyoming Properties) from Enserch Exploration, Inc. The
initially agreed-to purchase price of $47,500,000 was adjusted to $45,122,000 to
reflect  adjustments of net production revenue which accrued to the Company from
April 1, 1996, the effective  date,  until closing,  net of interest owed by the
Company for the same period and transaction costs. The acquisition was accounted
for as a purchase and the purchase  price was allocated to crude oil and natural
gas  properties  based  on the  fair  values  of the  properties  acquired.  The
transaction was financed through  borrowings under the Company's bridge facility
referred to in Note 6.  Revenues and expenses from the Wyoming  Properties  have
been included in the consolidated financial statements since September 30, 1996.

CGGS Acquisition

         On November 14, 1996, the Company, through its wholly owned subsidiary,
Canadian Abraxas  Petroleum Limited  (Canadian  Abraxas),  purchased 100% of the
outstanding capital stock of CGGS Canadian Gas Gathering Systems Inc. (CGGS) for
approximately  $85,500,000,   net  of  the  CGGS  cash  acquired  and  including
transaction  costs. CGGS owns producing oil and gas properties in western Canada
and adjacent gas gathering  and  processing  facilities  as well as  undeveloped
leasehold properties.  Immediately after the purchase,  CGGS was merged with and
into Canadian  Abraxas.  The acquisition was accounted for as a purchase and the
purchase  price was allocated to the assets and  liabilities  based on estimated
fair values.  The transaction was financed by a portion of the proceeds from the
offering of  $215,000,000  of Notes referred to in Note 6. Revenues and expenses
from  Canadian  Abraxas  have  been  included  in  the  consolidated   financial
statements since November 14, 1996.

Grey Wolf Acquisition

         In January 1996, the Company made a $3,000,000  investment in Grey Wolf
Exploration  Ltd. (Grey Wolf), a privately held Canadian  corporation,  which in
turn invested in newly issued shares of Cascade Oil and Gas Ltd.  (Cascade),  an
Alberta,  Canada  corporation  whose  shares  are  traded on the  Alberta  Stock
Exchange.  The Company owns 78% of the  outstanding  capital stock of Grey Wolf,
and,  through Grey Wolf, the Company owns  approximately  52% of the outstanding
capital stock of Cascade.  The  acquisition  was accounted for as a purchase and
the purchase price was allocated to the assets and liabilities based on the fair
values.  Revenues and expenses have been included in the consolidated  financial
statements since January 1996. Certain officers and directors of the Company own
approximately 6% of the common stock of Grey Wolf and serve as directors of Grey
Wolf.

Portilla and Happy Fields Acquisition

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


                                      F-14
<PAGE>


         On November 14, 1996,  the Company closed an agreement with the Limited
Partner and certain  noteholders  (Noteholders) of the Partnership,  pursuant to
which the Company obtained the Limited Partner's interest in the Partnership and
the Noteholders' notes in the aggregate  principal amount of $5,920,000 (Notes),
resulting in the Company's  owning,  on a consolidated  basis, all of the equity
interests in the Partnership.  The aggregate  consideration  paid to the Limited
Partner and the Noteholders  was $6,961,000.  The Company also paid off the Bank
Loan which had an outstanding  principal  balance of approximately  $20,051,000,
and assumed a crude oil and natural gas price swap agreement (see Note 16).

         As a  result  of  obtaining  the  Limited  Partner's  interest  in  the
Partnership,  the Company  reacquired  those interests in the Portilla and Happy
Fields which it previously  owned, as well as the interest in the Portilla Field
previously  owned by the Pension  Fund.  The Company has included in its balance
sheet the amount  previously  removed from oil and gas  properties in connection
with the sale of its  interest  in the  Portilla  and Happy  Fields  during  the
quarter ended March 31, 1996,  as well as the amount of the purchase  price paid
for the Pension  Fund's  interest in the  Portilla  Field,  and all  development
drilling  expenditures  incurred  on the  properties,  less the  amount  of DD&A
related to the  properties  from the  formation of the  Partnership  through the
closing  of the  transaction.  The  purchase  was  financed  by a portion of the
proceeds  from the  offering  of the Notes  referred  to in Note 6. The  Company
recorded  its  share  of the net  loss of the  Partnership  from  March  1996 to
November 1996 of $513,000.  The Company also assumed and wrote off the remaining
deferred  financing  fees  and  organization  costs  of the  Partnership.  Gross
revenues and expenses from both the Company's  original interest in the Portilla
and Happy Fields as well as the interest in the Portilla Field  previously owned
by the Pension Fund have been included in the consolidated  financial statements
since November 14, 1996.

East White Point and Stedman Island Fields Acquisition

         In November 1996, the Company  obtained a release of the 50% overriding
royalty interest in the East White Point Field in San Patricia County, Texas and
the Stedman  Island  Field in Nueces  County,  Texas from the  Pension  Fund for
$9,271,000  before  adjustment  for  accrual  of net  revenue  to  closing.  The
acquisition was accounted for as a purchase and the purchase price was allocated
to  crude  oil and  natural  gas  properties  based on the  fair  values  of the
properties  acquired.  The transaction was financed through proceeds of the sale
of the Notes referred to in Note 6. Revenues and expenses from these  properties
have been included in the  consolidated  financial  statements since November 1,
1996. The Company recorded the net purchase price of approximately $9,271,000 to
its oil and gas properties.

Miscellaneous Working Interests

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

Texas Gulf Coast Properties Acquisition

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


                                      F-15
<PAGE>


West Texas Properties Acquisition

         In July 1994, the Company  acquired from various  parties  interests in
certain  producing  crude oil and natural gas  properties  located in West Texas
(the West Texas  Properties).  The net  purchase  price to Abraxas  amounted  to
approximately $28,242,000 including closing costs of approximately $383,000. The
acquisition was accounted for as a purchase and the purchase price was allocated
to  crude  oil and  natural  gas  properties  based on the  fair  values  of the
properties  acquired.  The  transaction  was financed  principally by additional
borrowings  under the Company's  credit agreement with First Union National Bank
of North  Carolina  (First  Union),  referred to in Note 6. Revenue and expenses
from the West Texas Properties have been included in the consolidated  financial
statements since July 1, 1994.

Overriding Royalty Interest Acquisition

         In June 1994,  the Company  acquired  from its prior  secured  lenders,
Endowment  Energy  Partners,  L.P.  (EEP)  and  Endowment  Energy  Co-Investment
Partnership (EECIP), 80% of the previously granted overriding royalty interests.
The net purchase price of  approximately  $5,174,000  consisted of $600,000 cash
and 45,741 shares of the Company's Series B 8% nonvoting cumulative  convertible
preferred  stock with a par value of $100 per share  (Series B Preferred) at the
time of issuance.  The preferred  shares were recorded at $4,574,100 at the date
of the  acquisition.  In  November  1995,  the  Company  exchanged  the Series B
Preferred  for an equal number of shares of its Series 1995-B  Preferred  Stock,
par value $.01 per share,  with a stated value of $100 per share.  The preferred
shares are convertible  into 508,182 shares of the Company's  common stock.  The
acquisition  was  accounted  for as a  purchase,  and  the  purchase  price  was
allocated  to crude oil and natural gas  properties  based on the fair values of
the  properties  acquired.  The cash  portion of the  transaction  was  financed
principally under the Company's credit agreement with First Union.  Revenues and
expenses  related to these  properties  have been  included in the  consolidated
financial statements since July 1, 1994.

         The condensed pro forma financial information for the periods presented
below  summarizes  on an unaudited  pro forma basis  approximate  results of the
Company's  consolidated  operations for the years ended December 31, 1994,  1995
and 1996 assuming the acquisitions of the Wyoming  Properties,  CGGS, Grey Wolf,
the Portilla and Happy  Properties,  and the East White Point and Stedman Island
Fields  occurred  at  January  1, 1995;  and the  acquisition  of the West Texas
Properties and Overriding  Royalty Interest occurred at January 1, 1994. The pro
forma  information does not necessarily  represent what the actual  consolidated
results  would have been for these  periods and is not intended to be indicative
of future results.

<TABLE>
<CAPTION>
                                                                           December 31
                                                       ----------------------------------------------------
                                                            1994               1995              1996
                                                      ------------------ -----------------  ---------------
                                                              (In thousands except per share data)
                                                                          (Unaudited)

<S>                                                       <C>                <C>               <C>       
     Revenues ..................................          $    13,972        $   46,132        $   60,077
                                                       ================= =================  ===============

     Income (loss) before discontinued
       operations and extraordinary items ......          $      (186)       $  (16,430)       $   (6,665)
                                                       ================= =================  ===============

     Net income (loss) .........................          $    (2,693)       $   16,430        $   (7,092)
                                                       ================= =================  ===============

     Income (loss) per common share:
       Before discontinued operations and
         extraordinary items ...................          $      (.13)       $    (3.54)       $    (.98)
       Net income (loss) .......................          $      (.71)       $    (3.54)       $   (1.04)
</TABLE>

Divestiture

         In July 1995,  the Company  sold its C.S.  Dean Unit for  approximately
$2,550,000.

                                      F-16
<PAGE>


3.  Marketable Securities

         In May 1993, the Financial  Accounting Standards Board issued Statement
of Financial  Accounting  Standards No. 115, "Accounting for Certain Investments
in Debt and Equity Securities" (SFAS 115),  effective for fiscal years beginning
after December 15, 1993. At December 31, 1994, the Company's  marketable  equity
securities were classified as  available-for-sale.  As of December 31, 1994, the
Company recognized a decrease of approximately $244,000 in shareholders' equity,
representing the recognition in shareholders' equity of unrealized depreciation,
net of taxes, for the Company's investment in equity securities determined to be
available-for-sale, previously carried at the lower of cost or market.

         The securities  had an original cost of $570,000.  In October 1996, the
Company  sold its  investment  in  marketable  securities,  realizing  a loss of
$235,000, which was recognized in the statement of operations for the year ended
December 31, 1996.

4.  Property and Equipment

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

                                           Estimated
                                          Useful Life     1995       1996
                                        -------------  ---------   --------
                                            Years       (In thousands)

Land, buildings, and improvements ..         15         $    177   $    269
Crude oil and natural gas properties       --            104,127    268,358
Natural gas processing plants ......         18             --       40,100
Equipment and other ................          7              693      1,316
                                                        --------   --------
                                                        $104,997   $310,043
                                                        ========   ========

5.  Related Party Transactions

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

         In connection with a note payable to the Company's President, principal
and  interest  payments  amounted  to $333,000  and  $355,000 in the years ended
December 31, 1994 and 1995, respectively. The note was fully paid in 1995.

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

         The  Company's  President  and certain  directors  of the Company  were
founders of Grey Wolf and in April 1995 purchased  900,000 shares of the capital
stock of Grey Wolf (initially representing 39% of the outstanding shares) for an
aggregate of CDN$90,000  (or CDN$0.10 per share) in cash.  In January 1996,  the
Company  purchased   20,325,096  shares  of  the  capital  stock  of  Grey  Wolf
(representing  78% of the  outstanding  shares) for an aggregate  of  $3,000,000
(approximately  CDN$4.1  million or CDN$.20  per share) in cash.  The  Company's
President and certain  directors,  as well as the two principal officers of Grey
Wolf,  currently own 13.8% of the issued and  outstanding  capital stock of Grey
Wolf.  In  addition,  the  Company's  President  owns  options to purchase up to
450,000  shares of Grey Wolf's capital stock at an exercise price of CDN$.10 per
share.


                                      F-17
<PAGE>


         In January  1996,  Grey Wolf  purchased  newly issued shares of Cascade
representing  66 2/3% of  Cascade's  capital  stock.  Certain  of the  Company's
directors  as well as the two  principal  officers  of Grey Wolf own  options to
purchase in the aggregate up to 2,600,000  shares of capital stock of Cascade at
an exercise price of CDN$.20 per share, and the Company's President owns options
to purchase up to 800,000 shares of Cascade's capital stock at an exercise price
of CDN$.34 per share.
Cascade currently has 61,365,000 shares of capital stock outstanding.

6.  Long-Term Debt

         Long-term debt consists of the following:

<TABLE>
<CAPTION>
                                                              December 31      September 30
                                                        -------------------   -------------
                                                           1995      1996          1997
                                                        -------------------   -------------              
                                                           (In thousands)      (Unaudited)

<S>                                                     <C>        <C>           <C>     
11.5% Senior Notes due 2004 (see below) .............   $   --     $215,000      $215,000
Credit facility due to Bankers Trust Company, ING
  Capital and Union Bank of California (see below)  .       --         --            --
Revolving lines of credit due under the First Union
  credit agreement (see below) ......................     35,557       --            --
Term notes due under the First Union credit
  agreement .........................................      6,000       --            --
  (see below)
Other ...............................................         44         32         2,330
                                                        --------   --------      --------
                                                          41,601    215,032       217,330
Less current maturities .............................       --         --            --
                                                        --------   --------      --------                                           
                                                        $ 41,601   $215,032      $217,330
                                                        ========   ========      ========                                         
</TABLE>

         On November 14, 1996,  the Company and Canadian  Abraxas  completed the
sale of $215,000,000  aggregate principal amount of Senior Notes due November 1,
2004 (Notes). Interest at 11.5% is payable semi-annually in arrears on May 1 and
November  1 of each  year,  commencing  on May 1,  1997.  The Notes are  general
unsecured obligations of the Company and Canadian Abraxas and rank pari passu in
right of payment to all future  subordinated  indebtedness  of the  Company  and
Canadian Abraxas. The Notes are, however,  effectively  subordinated in right of
payment to all existing  and future  secured  indebtedness  to the extent of the
value of the assets securing such indebtedness. The Company and Canadian Abraxas
are joint and several obligors on the Notes. The Notes are redeemable,  in whole
or in part,  at the  option of the  Company  and  Canadian  Abraxas  on or after
November 1, 2000, at the redemption  price of 105.75%  through October 31, 2001,
102.87% through October 31, 2002 and 100.00%  thereafter plus accrued  interest.
In addition,  any time on or prior to November 1, 1999, the Company and Canadian
Abraxas  may  redeem up to 35% of the  aggregate  principal  amount of the Notes
originally  issued with the cash  proceeds of one or more equity  offerings at a
redemption price of 111.5% of the aggregate  principal amount of the Notes to be
redeemed plus accrued interest,  provided,  however, that after giving effect to
such  redemption,  at least  $139,750,000  aggregate  principal  amount of Notes
remains outstanding. The Notes were issued under the terms of an Indenture dated
November 14, 1996 that contains, among others, certain covenants which generally
limit the ability of the  Company to incur  additional  indebtedness  other than
specific  indebtedness  permitted  under the  Indenture,  including  the  Credit
Facility  discussed  below,   provided  however,  if  no  event  of  default  is
continuing,  the Company may incur indebtedness if after giving pro forma effect
to the incurrence of such debt both the Company's  consolidated  earnings before
interest,  taxes,  depletion and amortization  (EBITDA)  coverage ratio would be
greater than 2.25 to 1.0 if prior to November 1, 1997, and at least equal to 2.5
to 1.0 thereafter and the Company's adjusted consolidated net tangible assets as
defined are greater than 150% of the aggregate consolidated  indebtedness of the
Company.  The Indenture  also contains other  covenants  affecting the Company's
ability to pay dividends on its common stock, sell assets and incur liens.

                                      F-18
<PAGE>


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

         On November 14, 1996, the Company repaid all amounts  outstanding under
the bridge  facility with proceeds  from the offering of  $215,000,000  of Notes
described  above and  entered  into an amended  and  restated  credit  agreement
(Credit  Facility)  with the  Lenders and Union Bank of  California.  The Credit
Facility provides for a revolving line of credit with an initial availability of
$20,000,000,  subject to a borrowing base condition. No amounts were outstanding
on December 31, 1996.

         On October 14, 1997, the Company amended its Credit Facility to provide
for a revolving line of credit with an availability of $40,000,000, subject to a
borrowing base condition. No amounts were outstanding on September 30, 1997.

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

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

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

         The Credit Facility  contains a number of covenants  that,  among other
things, restrict the ability of the Company to (i) incur certain indebtedness or
guarantee obligations, (ii) prepay other indebtedness including the Notes, (iii)
make investments, loans or advances, (iv) create certain liens, (v) make certain
payments, dividends and distributions, (vi) merge with or sell assets to another
person or  liquidate,  (vii)  sell or  discount  receivables,  (viii)  engage in
certain intercompany transactions and transactions with affiliates,  (ix) change
its business, (x) experience a change of control and (xi) make amendments to its
charter,  by-laws  and other debt  instruments.  In  addition,  under the Credit
Facility the Company is required to comply with specified  financial  ratios and
tests,  including  minimum debt service coverage ratios,  maximum funded debt to
EBITDA tests,  minimum net worth tests and minimum  working  capital tests.  The
Company is obligated to pay the Lenders on a quarterly basis a commitment fee of
0.50% per annum on the average  unused  portion of the commitment in effect from
time to  time.  The  Credit  Facility  contains  customary  events  of  default,
including  nonpayment  of principal,  interest or fees,  violation of covenants,
inaccuracy  of  representations  or warranties  in any material  respect,  cross
default  and cross  acceleration  to  certain  other  indebtedness,  bankruptcy,
material judgments and liabilities and change of control.

                                      F-19
<PAGE>


         As part of the bridge  facility,  the Company  entered into an interest
rate swap  agreement  (the Swap)  covering the period from September 18, 1996 to
August 18, 1998. The Swap  effectively  changes the interest rate on $25,000,000
of floating  rate debt to a fixed rate of 6.15% per annum for that time  period.
Net payments due under this  agreement are included as  adjustments  to interest
expense.  At December 31, 1996,  the fair value of this Swap,  as  determined by
BTCo was  approximately  $200,000 and has been  recorded as interest  expense at
December  31,  1996.  The  Company  is  exposed  to credit  loss in the event of
nonperformance by the counterparty.
The amount of such exposure is generally the unrealized gains in such agreement.

         In June 1994,  the Company  entered into a credit  agreement with First
Union and secured  advances  adequate to  extinguish  the total debt and accrued
interest owed to the Company's previous lenders.  The prepayment resulted in the
Company  recording an extraordinary  debt  extinguishment  charge of $1,172,000,
representing  the reduction of the deferred  financing fees related to the prior
debt. At December 31, 1995, the Company's  borrowings under the credit agreement
were  $41,557,000.  The borrowings  were composed of advances of $12,657,000 and
$22,900,000  under the  revolving  lines of credit which were due June 30, 1997,
and  $6,000,000  under the term  notes  which were also due June 30,  1997.  The
interest rate for the revolving  credit lines was, at the option of the Company,
either (a) the higher of First Union  prime plus 1/4% or the federal  funds rate
plus 3/4%,  floating,  payable monthly, or (b) LIBOR plus 2 1/4% (30-, 60-, 90-,
and  180-day  options),  with  interest  payable the earlier of maturity of each
LIBOR  tranche or  quarterly.  The interest  rate for the term notes was, at the
option of the  Company,  either (a) the higher of First Union prime plus 3/4% or
the federal funds rate plus 1 1/4%, floating, payable monthly, or (b) LIBOR plus
3 1/4% (30-, 60-, 90-, and 180-day  options),  with interest payable the earlier
of maturity  of each LIBOR  tranche or  quarterly.  At December  31,  1995,  the
$12,657,000 revolver carried interest at 8.19%, the $22,900,000 revolver carried
interest  at 8.06%,  and the term notes at 8.16%.  The  revolvers  provided  for
borrowing  based  principally on the Company's crude oil and natural gas reserve
base,  which was  $44,000,000  at  December  31, 1995 and such  borrowings  were
secured  by a  first-priority  mortgage  on all of the  Company's  crude oil and
natural  gas  properties  and gas  plants,  as well as a  security  interest  in
accounts receivable,  inventory,  contracts,  and general  intangibles,  and are
guaranteed by the Company.  As discussed  above,  in September 1996, the Company
entered into a new credit facility and  extinguished  the total debt and accrued
interest owed to First Union. The prepayment  resulted in the Company  recording
an  extraordinary  debt  extinguishment  charge  of  $427,000  representing  the
reduction of the deferred financing fees related to the debt.

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

         During 1996, the Company capitalized $465,000 of interest expense.

         The fair value of the Notes  approximates  their  carrying  value as of
December 31, 1996. The Company has  approximately  $60,000 of standby letters of
credit and a $30,000  performance bond open at December 31, 1996.  Approximately
$90,000 of cash is restricted and in escrow related to the letters of credit and
bond.


                                      F-20
<PAGE>


7.  Shareholders' Equity

Common Stock

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

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

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

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

Preferred Stock

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

         Effective  July 1, 1997, the holders of the Company's  preferred  stock
converted all of such shares into 508,183 shares of the Company's common stock.

Contingent Value Rights (CVR)

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

                                      F-21
<PAGE>


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

         In the event that the Company  determines  that no shares of the common
stock are  issuable  with  respect to the CVRs to such  holders,  the CVRs shall
terminate and become null and void and the holders shall have no further  rights
with  respect  thereto.  If the  Maturity  Date of the CVR  Agreement  had  been
December 31, 1996,  an aggregate of 1,013,060  shares of common stock would have
been issued to the holders of the CVRs.

         Should any  additional  shares of common stock be required to be issued
under the terms of the CVR Agreement,  such issuance will be considered to be an
adjustment to the original sales price per share received in connection with the
sale of the associated common shares; accordingly, the Company will increase its
common stock account for the par value related to the  additional  shares at the
time such shares are issued with a corresponding  decrease in additional paid-in
capital account.

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

Treasury Stock

         During the year ended December 31, 1996, the Company  purchased  74,640
shares of its  common  stock at a cost of  $405,000,  which  are  being  held as
treasury stock.

8.  Stock Option Plans and Warrants

Stock Options

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

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

         The Company's  various stock option plans have  authorized the grant of
options to management and directors  personnel for up to  approximately  795,000
shares of the Company's  common stock.  All options  granted have ten-year terms
and vest and become fully  exercisable  over four years of continued  service at
25% on each anniversary date.

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

                                      F-22
<PAGE>


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

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

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

     Pro forma net income (loss) .............   $    (1,652)       $     884
     Pro forma earnings per share:
       Primary ...............................   $      (.36)       $     .13

         Because Statement 123 is applicable only to options granted  subsequent
to December 31, 1994,  its pro forma  effect will not be fully  reflected  until
1997.

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

                                       1994                           1995                           1996
                           -----------------------------  -----------------------------  -----------------------------
                                      Weighted-Average               Weighted-Average               Weighted-Average
                            Options    Exercise Price      Options    Exercise Price     Options    Exercise Price(1)
                            (000s)                         (000s)                         (000s)
                           ---------- ------------------  ---------- ------------------  ---------  ------------------
<S>                            <C>           <C>               <C>          <C>               <C>         <C>     <C>
Outstanding-beginning of
   year ..................     133           $   6.62          103          $  7.93           219         $  6.71 (1)
Granted ..................      27              10.45          158             9.50           358            6.58
Exercised ................     (38)              4.64            -                 -           (2)           6.75
Forfeited ................     (19)              8.91          (42)            9.86           (24)           9.21
                           ----------                     ----------                     ---------

Outstanding-end of year ..     103           $   7.93          219          $  8.69           551         $  6.63
                           ==========                     ==========                     =========

Exercisable at end of year      28           $   7.43           53          $  8.06            93         $  6.65
                           ==========                     ==========                     =========

Weighted-average fair
   value of options
   granted during the year                                                  $  2.85                       $  3.46
</TABLE>

         Exercise prices for options  outstanding as of December 31, 1996 ranged
from $5.00 to $7.50. The  weighted-average  remaining  contractual life of those
options is 8.6 years.

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

         During the nine months ended  September 30, 1997,  the Company  granted
285,000 options at a weighted-average exercise price of $11.25 and 2,000 options
were exercised at a weighted-average exercise price of $6.00.

                                      F-23
<PAGE>


Stock Awards

         In addition to stock options granted under the plans  described  above,
the Long-Term Incentive Plan also provides for the right to receive compensation
in cash, awards of common stock, or a combination thereof. In 1995 and 1996, the
Company made direct  awards of common  stock of 4,800  shares and 1,000  shares,
respectively.

         The Company also has adopted the  Restricted  Share Plan for  Directors
which  provides  for  awards of common  stock to  nonemployee  directors  of the
Company who did not, within the year immediately  preceding the determination of
the  director's  eligibility,  receive  any award  under  any other  plan of the
Company.  In 1995 and 1996,  the Company  made direct  awards of common stock of
3,072 shares and 4,050 shares, respectively.

         During 1996, the Company's  shareholders approved the Abraxas Petroleum
Corporation  Director  Stock Option Plan (Plan),  which  authorizes the grant of
nonstatutory  options to acquire an aggregate of 104,000  common shares to those
persons who are directors and not officers of the Company.  Under the Plan, each
of the seven  eligible  directors was granted an option to purchase 8,000 common
shares at $6.75. These options are included in the above table.

Stock Warrants

         In connection with the EEP and EECIP financing  agreements entered into
in 1992 and 1993, the Company  granted stock warrants  covering 90,000 shares at
$5.25 per share and  135,000  shares at $7.00 per share.  During  1994,  211,500
warrants were  exercised to purchase  common stock for  $1,323,000.  In 1995 and
1996, no warrants were exercised by EEP or EECIP.

         In connection  with an amendment and increase in the facility under the
credit  agreement with First Union and the extension of the due date on the term
note, the Company granted stock warrants to First Union covering  424,000 shares
of its  common  stock at an average  price of $9.79 a share.  The  warrants  are
exercisable  in whole or in part through  December 1999 and are  nontransferable
without the consent of the Company.

         At December 31, 1996, the Company has  approximately  6,600,000  shares
reserved for future  issuance for  conversion  of its stock  options,  warrants,
Rights,  preferred stock, CVRs, and incentive plans for the Company's  directors
and employees.


                                      F-24
<PAGE>


9.  Income Taxes

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

                                                             December 31
                                                       ---------------------
                                                          1995         1996
                                                       --------    ---------
                                                           (In thousands)
Deferred tax liabilities:
  Full cost pool, including intangible
    drilling costs ..................................   $    661    $ 34,298
  State taxes .......................................        187         187
  Other .............................................        101          61
                                                        --------    --------
Total deferred tax liabilities ......................        949      34,546
Deferred tax assets:
  Depletion .........................................        242         431
  Net operating losses ..............................      6,163       6,831
  Other .............................................         13          12
                                                        --------    --------
Total deferred tax assets ...........................      6,418       7,274
Valuation allowance for deferred tax assets .........     (5,656)     (5,656)
                                                        --------    --------
Net deferred tax assets .............................        762       1,618
                                                        --------    --------
Net deferred tax liabilities ........................   $    187    $ 32,928
                                                        ========    ========

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

                                                        Current     Deferred
                                                       ---------    ---------
     Federal ........................................   $    -      $   -
     State ..........................................        -          -
     Foreign ........................................       176         -
                                                       ---------    ---------
                                                       $    176     $   -
                                                       =========    =========

         At December  31,  1996,  the Company  had,  subject to the  limitations
discussed below,  $20,094,000 of net operating loss  carryforwards  for U.S. tax
purposes,  of which it is  estimated  a maximum of  $17,562,000  may be utilized
before it expires.  These loss  carryforwards will expire from 2002 through 2010
if not utilized. At December 31, 1996, the Company had approximately $830,000 of
net operating loss carryforwards for Canadian tax purposes which expire in 2003.

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

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


                                      F-25
<PAGE>


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

         In addition to the Section 382 limitations,  uncertainties  exist as to
the future  utilization of the operating loss  carryforwards  under the criteria
set forth under FASB Statement No. 109. Therefore, the Company has established a
valuation  allowance of  $5,656,000  and  $5,657,000  for deferred tax assets at
December 31, 1995 and 1996, respectively.

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

                                                                    December 31
                                          -----------------------------------------------------------------
                                                  1994                  1995                  1996
                                          --------------------- --------------------- ---------------------
                                                                   (In thousands)
     <S>                                     <C>                    <C>                   <C>      
     Tax (expense) benefit at U.S.
       statutory rates (34%) ..........      $          (38)        $         411         $        (743)
     (Increase) decrease in deferred
       tax asset valuation allowance ..                  31                  (174)                   (1)
     Higher effective rate of foreign
       operations .....................                   -                     -                   (49)
     Percentage depletion .............                   -                     -                   189
     Other ............................                   7                  (237)                  428
                                          --------------------- --------------------- ---------------------
                                             $            -         $           -         $        (176)
                                          ===================== ===================== =====================
</TABLE>

10.  Commitments and Contingencies

Operating Leases

         During 1995,  the Company  entered into a  noncancelable  lease for new
primary  office  space which,  as amended,  provides for payments of $15,700 per
month through  January 1998,  $13,700 per month through March 2000,  and $19,000
per month through March 2006, at which time the lease expires.

         During the years ended  December 31, 1994,  1995, and 1996, the Company
incurred  rent  expense  of  approximately  $108,000,  $103,000,  and  $179,000,
respectively.  Future  minimum  rental  payments  are as follows at December 31,
1996:

     1997 .............................................    $  300,000
     1998 .............................................       300,000
     1999 .............................................       300,000
     2000 .............................................       300,000
     2001 .............................................       340,000
     Thereafter .......................................       970,000

         Aggregate  future minimum  rentals to be received  under  noncancelable
subleases as of December 31, 1996 amount to approximately $57,000.


                                      F-26
<PAGE>


Contingencies

         From time to time,  the Company is involved in  litigation  relating to
claims  arising  out of its  operations  in the normal  course of  business.  At
December 31, 1996, the Company was not engaged in any legal proceedings that are
expected, individually or in the aggregate, to have a material adverse effect on
the Company's financial statements.

11.  Discontinued Operations

         In January 1995,  the Company  entered into a plan to  discontinue  the
operations of its coal  properties  and  commenced the permanent  closing of the
mine. As of December 31, 1994,  the Company wrote off its investment in its coal
properties and related  equipment,  eliminated the related minority  interest in
the coal entities, and established a liability of $150,000 pursuant to a plan to
discontinue   operations   for  future  costs   related  to  closing  the  mine.
Additionally,  during 1994 the  Company  sold its  interest in Castle  Minerals,
Inc., which was acquired in 1992 to finance the coal  operations,  for $371,000,
net of  expenses  related  to the sale.  The  Company  recorded  a loss on these
transactions  in 1994 of $988,000.  The  revenues  from coal sales for the years
ended 1994 and 1995 were $104,310 and $-0-, respectively.

12.  Quarterly Results of Operations (Unaudited)

         Selected  results of operations for each of the fiscal  quarters during
the years ended December 31, 1995 and 1996 are as follows:
<TABLE>
<CAPTION>

                                            1st              2nd               3rd               4th
                                          Quarter          Quarter           Quarter           Quarter
                                      ---------------- ----------------- ----------------  ----------------
                                                     (In thousands, except per share data)
<S>                                      <C>              <C>              <C>               <C> 
Year Ended December 31, 1995
   Net revenue ....................      $    3,237       $   3,402        $    3,289        $    3,889
   Operating income ...............             763             931               647               542
   Net (loss) .....................            (225)            (83)             (375)             (525)
   Loss per common share ..........           (.07)            (.04)             (.10)             (.13)
Year Ended December 31, 1996
   Net revenue ....................           4,477           3,305             3,616            15,255
   Operating income ...............           1,486             365               744             6,231
   Income (loss) before
     extraordinary item ...........             599            (240)             (236)            1,817
   Net income (loss) ..............             599            (240)             (605)            1,759
   Earnings (loss) per common
     share before extraordinary
     item .........................            .08             (.06)             (.06)              .25
   Earnings (loss) per common and
     common equivalent share ......            .08             (.06)             (.12)              .24
</TABLE>

         During  the fourth  quarter  of 1996,  the  Company  completed  several
acquisitions  as described in Note 2 which  affected net revenues,  gross profit
and net income.

         Certain previously reported financial information has been reclassified
to conform with the current presentation.


                                      F-27
<PAGE>


13.  Benefit Plans

         The Company  has a defined  contribution  plan  (401(k))  covering  all
eligible  employees of the Company.  No  contributions  were made by the Company
during 1994 or 1995.  During 1996, the Company  contributed  2,500 shares of its
common stock to the Plan and recorded the fair value of $12,500 as  compensation
expense. The employee contribution  limitations are determined by formulas which
limit the upper  one-third of the plan members  from  contributing  amounts that
would cause the plan to be top-heavy. The overall contribution is limited to the
lesser of 20% of the employee's annual compensation or $9,240.

         In January 1995, the Company created the Technical  Employees Incentive
Bonus Plan,  whereby  technical  employees have an incentive to find and develop
crude oil and  natural  gas  reserves on an  economic  basis  beneficial  to the
Company  and  its  shareholders.   Participants  are  any  technical   employees
(geologist, geophysicist, engineer) not covered by another incentive bonus plan.
A participant may earn a monetary bonus of up to 65% of the  participant's  base
salary each year.  The bonuses are  determined in the first quarter of each year
and are based upon the amount of new proved developed  producing reserves booked
each  year  on  approved  exploration  and  exploitation  projects  taking  into
consideration  the cost per  equivalent  barrel of developing  the new reserves.
During 1995 and 1996, the Company incurred no bonus expense.

14. Summary Financial Information of Canadian Abraxas Petroleum Ltd.

         The following is summary financial information at December 31, 1996 and
September 30, 1997  (Unaudited)  and for the year and the nine months then ended
of Canadian Abraxas, a wholly owned subsidiary of the Company.  Canadian Abraxas
is  jointly  and  severally   liable  for  the  entire   balance  of  the  Notes
($215,000,000),  of which  $84,612,000  was  utilized  by  Canadian  Abraxas  in
connection with the acquisition of CGGS. The Company has not presented  separate
financial  statements and other disclosures  concerning Canadian Abraxas because
management has determined  that such  information is not material to the holders
of the Notes.

                                             December 31,    September 30,
                                                  1996          1997  
                                            -------------------------------
                                                       (In thousands)
BALANCE SHEET
Assets
Total current assets ................       $    6,174     $     9,034
Oil and gas properties ..............          115,671          97,556
Other assets ........................            3,302           3,998
                                            -------------------------------
                                            $ 125,147      $   110,588
                                            ===============================
Liabilities and Shareholder's Equity
Total current liabilities ..........        $   3,624      $     5,474
11.5% Senior Notes due 2004 ........           84,612           74,682
Other liabilities ..................           34,797           33,523
Shareholder's equity ...............            2,114           (3,091)
                                            ===============================
                                            $ 125,147      $   110,588
                                            ===============================

                                                               Nine Months
                                            Year Ended           Ended
                                            December 31,       September 30,
                                              1996                1997
                                           ---------------------------------
STATEMENTS OF OPERATIONS
Revenues ........................           $   3,972      $    13,382
Operating costs and expenses ....              (2,292)         (11,544)
Interest expense ................              (1,331)          (6,999)
Other income (expense) ..........                  23             (242)
Income tax (expense) benefit.....                (175)           1,289
                                          ==================================
   Net income (loss) ............           $     197      $    (4,114)
                                          ==================================

                                      F-28
<PAGE>


15.  Business Segments

         The Company conducts its operations through two industry segments,  the
exploration for and the acquisition, development and production of crude oil and
natural  gas (E&P) and the  processing  of  natural  gas  (Processing).  The E&P
segment  acquires and explores  for,  develops,  produces and markets crude oil,
condensate natural gas liquids and natural gas. The Processing segment processes
natural gas owned by third parties. The Company's significant E&P operations are
located in the Texas Gulf Coast,  the Permian Basin of west Texas,  southwestern
Wyoming  and  western  Canada.  The  Processing  segment  engages in natural gas
gathering and processing  operations.  Natural gas gathering  operations involve
locating and  contracting  for natural gas supplies  produced from crude oil and
natural gas fields and the operation and  maintenance  of a gathering  system of
pipelines that connect such natural gas supply sources to natural gas processing
plants. Natural gas processing involves the custom processing of natural gas for
third parties.  Segment income excludes  interest  income,  interest expense and
unallocated  general corporate  expenses.  Identifiable  assets are those assets
used in the operations of the segment.  Corporate  assets  consist  primarily of
deferred financing fees and other property and equipment. The Company's revenues
are  derived  primarily  from the sale of crude  oil,  condensate,  natural  gas
liquids and natural gas to marketers and refiners and from  processing fees from
the custom  processing  of natural gas. As a general  policy,  collateral is not
required for  receivables;  however,  the credit of the  Company's  customers is
regularly  assessed.  The  Company is not aware of any  significant  credit risk
relating to its  customers  and has not  experienced  significant  credit losses
associated with such receivables.

         In 1996 seven  customers  accounted  for  approximately  66% of oil and
natural gas production  revenues and three customers accounted for approximately
54% of gas  processing  revenues.  In 1995 and 1994 one customer  accounted  for
approximately  20%  and  35%  of  oil  and  natural  gas  production   revenues,
respectively.

         Business  segment  information  about the Company's 1996  operations in
different industries is as follows:
<TABLE>
<CAPTION>

                                                             E&P           Processing           Total
                                                       ----------------- ----------------  ----------------
                                                                         (In thousands)

<S>                                                       <C>               <C>              <C>         
Revenues .....................................            $    26,053       $       600      $     26,653
                                                       ================= ================  ================

Operating profit .............................            $     8,737       $        19      $      8,756
                                                       ================= ================
General corporate expenses ...................                                                       (119)
Interest expense and amortization of deferred
   financing fees ............................                                                     (6,521)
                                                                                           ----------------
   Income from continuing operations before
     income taxes ............................                                               $      2,116
                                                                                           ================

Identifiable assets ..........................            $   253,707       $    40,700      $    294,407
                                                       ================= ================
Corporate assets .............................                                                     10,435
                                                                                           ----------------
   Total assets ..............................                                               $    304,842
                                                                                           ================
</TABLE>

         Depreciation  and depletion for E&P and  Processing  was  approximately
$9,143,000  and  $291,000,  respectively.   Capital  expenditures  for  E&P  and
Processing were $145,600,000 and $27,300,000, respectively.

         During 1994 and 1995 the Company's  operations were entirely in the E&P
segment.


                                      F-29
<PAGE>


         Business  segment  information  about the Company's 1996  operations in
different geographic areas is as follows:
<TABLE>
<CAPTION>

                                                       U.S.               Canada              Total
                                                 ------------------  ------------------ -------------------
                                                 (In thousands)

<S>                                                 <C>                 <C>               <C>           
Revenues ...................................        $      21,999       $       4,654     $       26,653

Operating profit ...........................        $       7,062       $       1,694     $        8,756
                                                 ==================  ==================
General corporate expenses .................                                                        (119)
Interest expense and amortization of
   deferred financing fees .................                                                      (6,521)
                                                                                        ===================
   Income from continuing operations before
     income taxes ..........................                                              $        2,116
                                                                                        ===================

Identifiable assets at December 31, 1996 ...        $     168,141       $     126,266     $      294,407
                                                 ==================  ==================
Corporate assets ...........................                                                      10,435
                                                                                        -------------------
   Total assets ............................                                              $      304,842
                                                                                        ===================
</TABLE>

         During  1994 and 1995 the  Company's  operations  were  entirely in the
United States.

16.  Commodity Swap Agreements

         The Company enters into commodity swap agreements (Hedge Agreements) to
reduce its  exposure  to price risk in the spot market for crude oil and natural
gas.  Pursuant to the Hedge  Agreements,  either the Company or the counterparty
thereto  is  required  to make  payment  to the other at the end of each  month.
During the period from March 1996 through November 1996, payments were exchanged
equal to the product of 5,000 MMBtu  (million  Btu's) of natural gas per day and
the difference  between a specified fixed price and a variable price for natural
gas based on the arithmetic  average of the last three trading days'  settlement
price  quoted for  natural gas  contracts  on the New York  Mercantile  Exchange
(NYMEX).  This Hedge Agreement  provided for the Company to make payments to the
counterparty  to the extent  that the market  price  exceeds  the fixed price of
$1.747 per MMBtu (thousand  Btu's) and for the  counterparty to make payments to
the  Company to the extent the market  price was less than  $1.747 per MMBtu.  A
loss of $511,000 was incurred during the period of hedged production.

         In  November  1996,  the Company  assumed  Hedge  Agreements  extending
through  October  2001 with a  counterparty  involving  the  following  notional
quantities and fixed prices:
<TABLE>
<CAPTION>
                                          Crude Oil                              Natural Gas
                             --------------------------------------  --------------------------------------
                             Notional Quantity                       Notional Quantity
                                 per Month             Fixed         per Month (MMBtu)         Fixed
                                 (barrels)             Price                                   Price
                                                     (barrel)                                 (MMBtu)
                             ------------------- ------------------  ------------------  ------------------

     <S>                            <C>               <C>                   <C>               <C>      
     1996                           20,060            $  17.53              87,406            $   1.925
     1997                           15,810            $  17.20              53,712            $   1.797
     1998                           13,175            $  17.20              36,601            $   1.793
     1999                           11,050            $  17.47              24,489            $   1.820
     2000                            9,180            $  17.78              18,794            $   1.872
     2001                            8,160            $  18.08              14,850            $   1.902

</TABLE>

                                      F-30
<PAGE>


         These Hedge Agreements  provide for the Company to make payments to the
counterparty to the extent the market prices  determined  based on the price for
west Texas intermediate light sweet crude oil on the NYMEX for crude oil and the
Inside FERC,  Tennessee Gas Pipeline  Co.;  Texas (Zone O) price for natural gas
exceeds the above fixed prices and for the  counterparty to make payments to the
Company to the extent the market  prices are less than the above  fixed  prices.
The  Company  accounts  for the  related  gains or losses (a loss of $453,000 in
1996)  in  crude  oil and  natural  gas  revenue  in the  period  of the  hedged
production. The average notional quantity of crude oil and natural gas under the
Hedge  Agreements  each  month for 1997 is equal to  approximately  19% and .5%,
respectively, of the Company's expected monthly production for 1997 based on the
Company's  January 1, 1997 reserve reports.  At December 31, 1996, the estimated
fair market value of the Hedge Agreements is a loss of $2,460,000.

         In January 1997, the Company effectively  collared its crude oil prices
between $19.00 and $25.60 per barrel on 1,000 barrels per day from February 1997
through December 1997.

17.  Subsequent Events

         On January 31, 1997 the Company  sold its interest in its crude oil and
natural gas property,  plant, and equipment in the Hoole area in Alberta, Canada
for approximately $9,300,000.

Events (Unaudited) Subsequent to Date of Report of Independent Auditors

         On October  15,  1997,  Canadian  Abraxas  and  Cascade  completed  the
acquisition of the Canadian assets of Pacalta Resources Ltd. for C$21.75 million
in cash and four million Cascade Special Warrants.  The initial ownership of the
assets  acquired is 92% by Canadian  Abraxas and 8% by Cascade.  Cascade has the
opportunity  to acquire  the  Canadian  ownership  upon  arranging  satisfactory
financing in 1998.

         On November 12, 1997, the Company entered into an agreement to purchase
100% of the  outstanding  capital  stock of Vessels  Energy,  Inc.  (Vessels) in
exchange for common stock of the Company. Under the terms of the agreement,  the
Company will  initially  issue  approximately  562,070 shares of common stock in
exchange  for all of the  capital  stock of Vessels  and is  obligated  to issue
additional  shares of its common stock under an agreed to Projected  Provisional
Payment. The Projected  Provisional Payment is based upon future earnings before
interest,  taxes, and depreciation,  depletion,  and amortization  produced from
certain non-proved developed producing and non-producing  properties of Vessels'
during  the period  from  February  1, 1998 to January  31,  1999.  The  Company
anticipates  issuing to the Vessels  stockholders  and depositing  approximately
767,657 shares of its Common Stock in a Provisional Payment Escrow account which
will  entitle  the Vessels  stockholders  to voting  rights and other  rights of
ownership  including  receipt  of  dividends.  Upon final  determination  of the
Provisional  Payment,  the shares of the Company's Common Stock will be released
from the Provisional  Payment Escrow and recorded at the current market value at
the time of the  Provisional  Payment is determined and such  additional  Common
Stock are  released.  To the  extent the  Projected  Provisional  Payment  would
require the issuance of shares in excess of those escrowed,  such shares will be
issued by the Company.

         Additionally,  at closing the  Company  and Vessels  will enter into an
Escrow  Agreement  pursuant  to which an  aggregate  of  472,222  shares  of the
Company's  common  stock will be  deposited  into a separate  escrow  account to
secure certain  reimbursement  obligations of the stockholders of Vessels to the
Company relating primarily to certain potential  environmental issues as well as
to breach of  certain  representations  and  warranties  set forth in the Merger
Agreement with respect to the shares deposited in the Provisional Payment Escrow
and  liabilities,  if any,  arising under a natural gas supply contract  (Supply
Contract) between Vessels and a third party.

         The escrow shares  include  388,889 shares which will be collateral for
claims related to the Supply Contract  (Supply  Contract  Escrow Shares).  These
shares will not be deposited into the escrow  account if the Supply  Contract is
terminated (as defined in the Escrow Agreement) prior to closing.  If the Supply
Contract is not  terminated  prior to closing,  however,  these Supply  Contract
Escrow  Shares will remain in escrow and be subject to any claims by the Company

                                      F-31
<PAGE>

for damages related to the Supply  Contract.  The Supply Contract Escrow Shares,
and  any  escrow  cash  payment  (as  defined),  will  be  released  to  Vessels
stockholders  15 days after the termination of the Supply  Contract,  provided a
sufficient  number of shares will remain in escrow as collateral for any pending
or  unresolved  claims  related to the  Supply  Contract  until such  claims are
resolved.

         The Supply Contract  obligates Vessels to supply a third party with gas
volumes   sufficient  to  cover  the  annual   contract   quantity   obligations
(approximately  1,537,000  Mmbtus).  Ninety-five  percent of the annual contract
quantity  will be  delivered to the third party at prices of $1.85,  $1.70,  and
$1.65 per Mmbtu in 1997, 1998 and 1999,  respectively,  and at escalated prices,
as defined,  in years  2000-2008.  Five percent of the annual contract  quantity
will be  delivered  to the third party at prices of $2.16 per Mmbtu in 1997-1998
and at escalated prices as defined, for years 2000-2008.

18.  Supplemental Oil and Gas Disclosures (Unaudited)

         The accompanying  table presents  information  concerning the Company's
crude  oil and  natural  gas  producing  activities  as  required  by  Financial
Accounting  Standards 69, "Disclosures about Oil and Gas Producing  Activities."
Capitalized costs relating to oil and gas producing activities are as follows:

                                                   December 31
                                              ----------------------
                                                1995         1996
                                              ---------    --------- 
                                                  (In thousands)
Proved crude oil and natural gas properties   $ 104,127    $ 231,090
Unproved properties .......................        --         37,268
                                              ---------    ---------
  Total ...................................     104,127      268,358
Accumulated depreciation, depletion, and
  amortization, and valuation allowances ..     (29,651)     (38,368)
                                              ---------    ---------
    Net capitalized costs .................   $  74,476    $ 229,990
                                              =========    =========


                                      F-32
<PAGE>



    
         Costs incurred in oil and gas property  acquisitions,  exploration  and
development activities are as follows:
<TABLE>
<CAPTION>

                                                                   Years Ended December 31
                                 --------------------------------------------------------------------------------------------
                                           1994                            1995                           1996
                             ------------------------------   ------------------------------   ------------------------------ 
                               Total      U.S.      Canada     Total       U.S.      Canada     Total       U.S.      Canada
                             --------   --------   --------   --------   --------   --------   --------   --------   --------      
                                                                                              (In thousands)

<S>                           <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>     
Property acquisition costs:
  Proved ..................   $ 33,597   $ 33,597   $   --     $    719   $    719   $   --     $ 87,005   $ 37,609   $ 49,396
  Unproved ................          5          5       --         --         --         --       37,268      8,230     29,038
                              --------   --------   --------   --------   --------   --------   --------   --------   --------

                              $ 33,602   $ 33,602   $   --     $    719   $    719   $   --     $124,273   $ 45,839   $ 78,434
                              ========   ========   ========   ========   ========   ========   ========   ========   ========

Property development and
  exploration costs .......   $  7,151   $  7,151   $   --     $ 11,398   $ 11,398   $   --     $ 18,133   $ 18,115   $     18
                              ========   ========   ========   ========   ========   ========   ========   ========   ========
</TABLE>

         The results of operations  for oil and gas producing  activities are as
follows:

<TABLE>
<CAPTION>
                                                                   Years Ended December 31
                             ------------------------------------------------------------------------------------------------------
                                           1994                               1995                             1996
                             --------------------------------   --------------------------------   --------------------------------
                              Total        U.S.       Canada     Total        U.S.      Canada      Total        U.S.      Canada
                             --------    --------    --------   --------    --------    --------   --------    --------    --------
                                                                                              (In thousands)

<S>                          <C>         <C>         <C>        <C>         <C>         <C>        <C>         <C>         <C>     
Revenues .................   $ 11,114    $ 11,114    $   --     $ 13,660    $ 13,660    $   --     $ 25,749    $ 21,758    $  3,991
Production costs .........     (3,693)     (3,693)       --       (4,333)     (4,333)       --       (5,858)     (5,193)       (665)
Depreciation,
  depletion, and .........     (3,777)     (3,777)       --       (5,313)     (5,313)       --       (9,103)     (7,695)     (1,408)
  amortization
General and ..............       (202)       (202)       --         (261)       (261)       --         (483)       (401)        (82)
  administrative
Income taxes .............       --          --          --         --          --          --         (148)       --          (148)
                             --------    --------    --------   --------    --------    --------   --------    --------    --------

Results of operations from
  oil and gas producing
  activities (excluding
  corporate overhead and .   $  3,442    $  3,442    $   --     $  3,753    $  3,753    $   --     $ 10,157    $  8,469    $  1,688
  interest costs)
                             ========    ========    ========   ========    ========    ========   ========    ========    ========
Depletion rate per
  barrel of oil ..........   
  equivalent                 $   4.35    $   4.35    $   --     $   4.67    $   4.67    $   --     $   5.12    $   5.10    $   5.29
                             ========    ========    ========   ========    ========    ========   ========    ========    ========

</TABLE>

                                      F-33
<PAGE>


Estimated Quantities of Proved Oil and Gas Reserves

         The following  table presents the Company's  estimate of its net proved
crude oil and natural gas reserves as of December 31, 1994,  1995, and 1996. The
Company's management  emphasizes that reserve estimates are inherently imprecise
and that estimates of new discoveries are more imprecise than those of producing
oil and gas  properties.  Accordingly,  the  estimates are expected to change as
future  information  becomes  available.  The  estimates  have been  prepared by
independent petroleum reserve engineers.
<TABLE>
<CAPTION>

                                                    Total                  United States               Canada
                                             ---------------------   ----------------------    ----------------------
                                                 Liquid    Natural     Liquid       Natural       Liquid      Natural
                                              Hydrocarbons   Gas     Hydrocarbons    Gas       Hydrocarbons    Gas
                                             ------------- -------   ------------  --------    ------------  --------
                                               (Barrels)    (Mcf)      (Barrels)    (Mcf)       (Barrels)     (Mcf)
                                             ------------- -------   -----------   --------    ------------  --------              
                                                                           (In thousands)
Proved developed and undeveloped reserves:
<S>                                            <C>        <C>          <C>        <C>           <C>        <C>      
  Balance at December 31, 1993 ...........      4,086      16,591       4,086      16,591        --          --
    Revisions of previous estimates ......        854       5,034         854       5,034        --          --
    Extensions and discoveries ...........      2,268      15,062       2,268      15,062        --          --
    Purchase of minerals in place ........      2,417      33,288       2,417      33,288        --          --
    Production ...........................       (469)     (2,393)       (469)     (2,393)       --          --
    Sale of minerals in place ............       --            (3)       --            (3)       --          --
                                             --------    --------    --------    --------    --------    --------
  Balance at December 31, 1994 ...........      9,156      67,579       9,156      67,579        --          --
    Revisions of previous estimates ......     (1,328)    (18,941)     (1,328)    (18,941)       --          --
    Extensions and discoveries ...........      1,335       6,819       1,335       6,819        --          --
    Purchase of minerals in place ........        214       2,889         214       2,889        --          --
    Production ...........................       (544)     (3,553)       (544)     (3,553)       --          --
    Sale of minerals in place ............       (566)       (224)       (566)       (224)       --          --
                                             --------    --------    --------    --------    --------    --------
  Balance at December 31, 1995 ...........      8,267      54,569       8,267      54,569        --          --
    Revisions of previous estimates ......        680      (2,561)        680      (2,561)       --          --
    Extensions and discoveries ...........      1,752      10,194       1,746      10,060           6         134
    Purchase of minerals in place ........      8,062     121,408       6,694      65,135       1,368      56,273
    Production ...........................       (724)     (6,350)       (670)     (5,042)        (54)     (1,308)
    Sale of minerals in place ............         (2)       --            (2)       --          --          --
                                             --------    --------    --------    --------    --------    --------

  Balance at December 31, 1996 ...........     18,035     177,260      16,715     122,161       1,320      55,099
                                             ========    ========    ========    ========    ========    ========
</TABLE>

(1) Includes  120,400  barrels of crude oil  reserves  owned by Cascade of which
57,600  barrels  are  applicable  to the  minority  interest's  share  of  these
reserves.

                                      F-34
<PAGE>


Estimated Quantities of Proved Oil and Gas Reserves (continued)
<TABLE>
<CAPTION>

                                    Total            United States                Canada
                           ---------------------- ------------ --------------------------------
                              Liquid      Natural    Liquid     Natural     Liquid     Natural
                           Hydrocarbons     Gas   Hydrocarbons    Gas    Hydrocarbons    Gas
                            (Barrels)      (Mcf)    (Barrels)    (Mcf)    (Barrels)     (Mcf)
                           ------------- -------- ------------ --------  ------------ ---------                           
                                                     (In Thousands)
<S>                              <C>     <C>            <C>     <C>             <C>     <C>      
Proved developed reserves:
  December 31, 1994 ......        5,701   48,973         5,701   48,973        --         --
                           ============  =======  ============  =======  ============   =======

  December 31, 1995 ......        6,000   44,026         6,000   44,026        --         --
                           ============  =======  ============  =======  ============   =======

  December 31, 1996 ......       14,961  157,660        13,641  103,639         1,320    54,021
                           ============  =======  ============  =======  ============   =======
</TABLE>

         The significant upward revision in 1994 of previous liquid hydrocarbons
and  natural gas was due  principally  to  increased  estimates  of  recoverable
reserves in existing wells as a result of drilling and workover success in 1994,
combined with the completion of geological  engineering studies on several major
fields.

         The   significant   downward   revision  in  1995  of  previous  liquid
hydrocarbons  and natural gas was due  principally  to  decreased  estimates  of
recoverable reserves in existing wells related to disappointing drilling results
principally  in the East White Point  Field,  resulting in  reclassification  of
proved undeveloped reserves to probable reserves.


                                      F-35
<PAGE>


Standardized  Measure of Discounted Future Net Cash Flows Relating to Proved Oil
and Gas Reserves

         The following disclosures concerning the standardized measure of future
cash flows from proved  crude oil and  natural gas  reserves  are  presented  in
accordance  with  Statement  of  Financial  Accounting  Standards  No.  69.  The
standardized  measure does not purport to represent the fair market value of the
Company's proved crude oil and natural gas reserves.  An estimate of fair market
value  would also take into  account,  among  other  factors,  the  recovery  of
reserves not  classified  as proved,  anticipated  future  changes in prices and
costs, and a discount factor more  representative of the time value of money and
the risks inherent in reserve estimates.

         Under the standardized  measure,  future cash inflows were estimated by
applying  period-end  prices  at  December  31,  1996,  adjusted  for  fixed and
determinable escalations,  to the estimated future production of year-end proved
reserves.  Future cash inflows were reduced by estimated  future  production and
development  costs based on year-end  costs to determine  pre-tax cash  inflows.
Future  income  taxes were  computed by applying the  statutory  tax rate to the
excess of pre-tax cash inflows over the Company's basis in the associated proved
crude oil and  natural  gas  properties,  less the tax basis of the  properties.
Operating  loss  carryforwards,  tax credits,  and permanent  differences to the
extent  estimated  to be  available  in the future were also  considered  in the
future income tax calculations, thereby reducing the expected tax expense.

         Future net cash inflows after income taxes were discounted  using a 10%
annual discount rate to arrive at the Standardized Measure.

                                      F-36
<PAGE>


         Set forth below is the Standardized  Measure relating to proved oil and
gas reserves for:
<TABLE>
<CAPTION>

                                                                     Years Ended December 31
                              ------------------------------------------------------------------------------------------------------
                                            1994                               1995                             1996
                               --------------------------------  -------------------------------  ---------------------------------
                                 Total       U.S.      Canada      Total        U.S.     Canada     Total          U.S.     Canada
                               ---------   ---------   --------  ---------   ---------   -------  -----------   ---------  --------
                                                                              (In thousands)

<S>                            <C>         <C>         <C>       <C>         <C>         <C>     <C>           <C>        <C>      
Future cash inflows .........  $ 238,028   $ 238,028   $   --    $ 243,969   $ 243,969   $   --  $ 1,009,420   $ 824,776  $ 184,644
Future production and
  development costs .........    (84,552)    (84,552)      --      (79,910)    (79,910)      --     (251,749)   (201,498)   (50,251)
Future income tax expense ...    (26,542)    (26,542)      --      (28,015)    (28,015)      --     (207,834)   (157,508)   (50,326)
                               ---------   ---------   --------  ---------   ---------   ------- -----------   ---------  ---------
Future net cash flows .......    126,934     126,934       --      136,044     136,044       --      549,837     465,770     84,067
Discount ....................    (49,241)    (49,241)      --      (48,884)    (48,884)      --     (220,016)   (193,221)   (26,795)
                               ---------   ---------   --------  ---------   ---------   ------- -----------   ---------  ---------
Standardized Measure of
  discounted future net cash
  relating to proved reserves  $  77,693   $  77,693   $   --    $  87,160   $  87,160   $   --  $   329,821   $ 272,549  $  57,272
                               =========   =========   ========  =========   =========   ======= ===========   =========  =========

</TABLE>


                                      F-37
<PAGE>


                                                                               
Changes in Standardized  Measure of Discounted Future Net Cash Flows Relating to
Proved Oil and Gas Reserves

         The  following  is an  analysis  of the  changes  in  the  Standardized
Measure:



                                                   Year Ended December 31
                                            ------------------------------------
                                              1994        1995          1996
                                            ---------    ---------    ---------
                                                    (In thousands)
Standardized Measure, beginning
  of year ...............................   $  32,929    $  77,693    $  87,160
Sales and transfers of oil and gas
  produced, net of production costs .....      (7,421)      (9,351)     (19,887)
Net changes in prices and development and
  production costs from prior year ......       2,450       22,560       65,917
Extensions, discoveries, and improved
  recovery, less related costs ..........      13,509       13,475       30,699
Purchases of minerals in place ..........      29,163        3,867      244,930
Sales of minerals in place ..............          (2)      (3,355)         (24)
Revision of previous quantity estimates .       7,346      (24,937)       2,257
Change in future income tax expense .....       5,804          382      (87,393)
Other ...................................      (9,377)        (943)      (2,554)
Accretion of discount ...................       3,292        7,769        8,716
                                            ---------    ---------    ---------
  Standardized Measure, end of year .....   $  77,693    $  87,160    $ 329,821
                                            =========    =========    =========



                                      F-38
<PAGE>










                        AUDITORS' REPORT TO THE DIRECTORS



To the Board of Directors of
Canadian Abraxas Petroleum Ltd.

         We have  audited  the balance  sheets of CGGS  Canadian  Gas  Gathering
Systems  Inc.  as at October 31,  1995 and 1996 and the  statements  of earnings
(loss) and deficit and changes in financial position for the years ended October
31, 1994, 1995 and 1996. These financial  statements are the  responsibility  of
the Company's  management.  Our responsibility is to express an opinion on these
financial statements based on our audits.

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

         In our opinion,  these  financial  statements  present  fairly,  in all
material respects,  the financial position of the Company as of October 31, 1995
and 1996 and the  results of its  operations  and the  changes in its  financial
position for the years ended October 31, 1994,  1995 and 1996 in accordance with
generally accepted accounting principles.



KPMG
Chartered Accountants

Calgary, Canada
December 16,1997


                                      F-39
<PAGE>
<TABLE>
<CAPTION>


                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                                 BALANCE SHEETS

                              (In Canadian Dollars)


                                     ASSETS

                                                                               October 31
                                                              ---------------------------------------------
                                                                      1995                    1996
                                                              ---------------------   ---------------------
<S>                                                              <C>                     <C> 
Current assets:
   Cash and short-term deposits .......................          $    1,274,000          $   10,050,000
   Accounts receivable ................................              12,850,000              13,540,000
                                                              ---------------------   ---------------------
                                                                     14,124,000              23,590,000

Capital assets (note 3) ...............................             128,095,000             123,857,000
Deferred financing costs (note 4) .....................               1,482,000               1,336,000
Deferred foreign exchange loss ........................               7,882,000               6,858,000
                                                              ---------------------   ---------------------

   Total assets .......................................          $  151,583,000          $  155,641,000
                                                              =====================   =====================
</TABLE>
<TABLE>
<CAPTION>

                      LIABILITIES AND SHAREHOLDERS' EQUITY

                                                                              October 31
                                                             ----------------------------------------------
                                                                     1995                     1996
                                                             ----------------------   ---------------------
<S>                                                             <C>                     <C>  
Current liabilities:
   Debenture interest payable to shareholders .........         $    1,344,000          $     1,342,000
   Accounts payable ...................................              4,335,000                7,201,000
                                                             ----------------------   ---------------------
     Total current liabilities ........................              5,679,000                8,543,000

Long-term shareholders' debt (note 5) .................            113,070,000              113,179,000
Provision for future site restoration .................              3,015,000                4,148,000
                                                             ----------------------   ---------------------
                                                                   121,764,000              125,870,000

Shareholders' equity:
   Share capital (note 6) .............................             34,213,000               34,213,000
   Deficit ............................................             (4,394,000)              (4,442,000)
                                                             ----------------------   ---------------------
     Total shareholders' equity                                     29,819,000               29,771,000

Commitments (note 10)
                                                             ----------------------   ---------------------
     Total liabilities and shareholders' equity .......         $  151,583,000          $   155,641,000
                                                             ======================   =====================

</TABLE>



                 See accompanying notes to financial statements.

                                      F-40
<PAGE>
<TABLE>
<CAPTION>


                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                    STATEMENTS OF EARNINGS (LOSS) AND DEFICIT

                              (In Canadian Dollars)



                                                                            Year Ended October 31
                                                          ----------------------------------------------------------
                                                                1994                1995                1996
                                                          ------------------ ------------------- -------------------
<S>                                                          <C>                <C>                 <C>
Revenues:
   Processing .........................................      $  30,408,000      $  33,100,000       $  36,954,000
   Production .........................................         35,855,000         22,408,000          26,791,000
   Royalties, net .....................................         (6,787,000)        (3,366,000)         (3,975,000)
   Other income .......................................          1,028,000            996,000             690,000
                                                          ------------------ ------------------- -------------------
                                                                60,504,000         53,138,000          60,460,000

Expenses:
   Processing .........................................         15,621,000         14,763,000          19,207,000
   Production .........................................          4,866,000          5,689,000           5,308,000
   Administration (note 7) ............................          3,960,000          4,507,000           4,117,000
   Interest on long-term shareholders' debt ...........         15,998,000         16,227,000          16,172,000
   Depletion and depreciation .........................         14,361,000         13,754,000          14,092,000
   Amortization of deferred financing costs ...........            146,000            146,000             146,000
   Foreign exchange loss ..............................            772,000            795,000           1,134,000
                                                          ------------------ ------------------- -------------------
                                                                55,724,000         55,881,000          60,176,000
                                                          ------------------ ------------------- -------------------
Earnings (loss) before taxes ..........................          4,780,000         (2,743,000)            284,000

Large corporation tax .................................            274,000            308,000             332,000
                                                          ------------------ ------------------- -------------------
Net earnings (loss) ...................................          4,506,000         (3,051,000)            (48,000)

Deficit - beginning of year ...........................         (5,849,000)        (1,343,000)         (4,394,000)
                                                          ------------------ ------------------- -------------------
Deficit - end of year .................................      $  (1,343,000)     $  (4,394,000)      $  (4,442,000)
                                                          ================== =================== ===================

</TABLE>



                 See accompanying notes to financial statements.

                                      F-41
<PAGE>
<TABLE>
<CAPTION>


                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                   STATEMENTS OF CHANGES IN FINANCIAL POSITION

                              (In Canadian Dollars)



                                                                            Year Ended October 31
                                                          ----------------------------------------------------------
                                                                1994                1995                1996
                                                          ------------------ ------------------- -------------------
<S>                                                          <C>                <C>                 <C>
Operating Activities:
   Net earnings (loss) ................................      $   4,506,000      $  (3,051,000)      $     (48,000)
   Depletion and depreciation .........................         14,361,000         13,754,000          14,092,000
   Amortization of deferred financing costs ...........            146,000            146,000             146,000
   Foreign exchange loss ..............................            772,000            795,000           1,134,000
   Decrease (increase) in non-cash working capital items        (5,443,000)        (7,004,000)          2,176,000
                                                          ------------------ ------------------- -------------------
                                                                14,342,000          4,640,000          17,500,000

Financing Activities:
   Issuance of share capital ..........................            583,000                  -                   -
   Increase in long-term shareholders' debt ...........          1,726,000                  -                   -
                                                          ------------------ ------------------- -------------------
                                                                 2,309,000                  -                   -

Investing Activities:
   Expenditures on capital assets .....................        (15,024,000)       (11,638,000)         (8,722,000)
   Increase in non-cash working capital .............           (3,771,000)           (54,000)             (2,000)
                                                          ------------------ ------------------- -------------------
                                                               (18,795,000)       (11,692,000)         (8,724,000)

Increase (decrease) in cash and short-term deposits ...         (2,144,000)        (7,052,000)          8,776,000

Cash and Short-Term Deposits:
   Beginning of year ................................           10,470,000          8,326,000           1,274,000
                                                          ------------------ ------------------- -------------------
   End of year ......................................        $   8,326,000      $   1,274,000       $  10,050,000
                                                          ================== =================== ===================

</TABLE>



                 See accompanying notes to financial statements.

                                      F-42
<PAGE>


                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                          NOTES TO FINANCIAL STATEMENTS


         The Company was incorporated on March 9, 1990 under the Canada Business
Corporations Act. The Company was formed to invest in gas plants,  gas gathering
systems  and  related  gas  reserves  in Canada.  Morrison  Petroleums  Ltd.,  a
shareholder, manages the Company.

1.  Summary of Significant Accounting Policies

         The  financial  statements  are prepared in accordance  with  generally
accepted accounting principles in Canada.

Foreign Currency Translation

         Monetary assets and monetary liabilities are translated at the exchange
rate in effect at the balance sheet date.  Gains and losses on  translation  are
recorded in the  statement of earnings,  except that gains or losses on monetary
liabilities with a fixed or  ascertainable  life are deferred and amortized over
the repayment period.

Joint Ventures

         The Company's  exploration and production activities related to oil and
gas  are  substantially  conducted  in  joint  participation  with  others  and,
accordingly,  the accounts reflect only the Company's  proportionate interest in
such activities.

Capital Assets

         The Company  follows the full cost method of accounting for exploration
and  development  expenditures  wherein all costs related to the exploration for
and the development of oil and gas reserves are capitalized. These costs include
leasehold acquisition costs, carrying charges of non-producing properties, costs
of drilling and completing wells, and oil and gas production equipment. Proceeds
received  from  the  disposal  of  properties  are  normally   credited  against
accumulated  costs  unless  this  would  result in a  significant  change in the
depletion  rate,  in which case, a gain or loss is computed and reflected in the
earnings statement.

         The  Company  carries  its oil  and  gas  properties  at the  lower  of
capitalized cost and net recoverable  value. Net recoverable value is future net
revenues from proven reserves plus unproven  properties at cost less impairment,
if any, net of the  provision for future site  restoration.  Future net revenues
are determined  using unit prices and production costs in effect at year-end and
include an allowance for future  overhead  costs,  site  restoration,  financing
charges and income taxes that will be incurred in earning these revenues.

         Petroleum  and  natural  gas   properties  are  depleted  and  tangible
production  equipment is depreciated using the  unit-of-production  method based
upon the estimated  proven oil and gas reserves  after  royalties.  Reserves are
converted to common units based on the approximate  equivalent energy content of
each unit of reserves, which results in a conversion ratio of six thousand cubic
feet of gas to one barrel of oil equivalent.

         Processing facilities are depreciated on a straight-line basis over the
estimated useful life of each facility.

                                      F-43
<PAGE>


                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)






Provision for Future Site Restoration

         Provision is made for future site restoration  costs. This provision is
charged to earnings over the  estimated  life of the proven oil and gas reserves
and processing  facilities  using the unit of production  and the  straight-line
methods respectively, and is included with depletion and depreciation.

Royalties

         Crown,  freehold and overriding  royalties and mineral taxes are net of
Alberta Royalty Tax Credits.

Deferred Financing Costs

         The  deferred   financing  costs  are  associated  with  obtaining  the
subscriptions  for units (see Note 2).  These costs were  amortized  evenly over
fifteen years.

2.  Formation and Unit Subscriptions

         Under the Unit  Subscription  Agreement,  the investors have subscribed
for units at U.S. $100,000 per unit consisting of U.S. $75,000 of debentures and
U.S.  $25,000 of Class A shares (2,500 Class A shares at a price of U.S. $10 per
share)  in  a  3-to-1  ratio.   The  Company   received   commitments  for  unit
subscriptions  totaling U.S.  $114,700,000  (U.S.  $86,025,000 of debentures and
2,867,500  Class A shares at U.S. $10 per share).  At October 31, 1996, 1995 and
1994 98.12% of the subscriptions were paid for and debentures and shares issued.

         On September 14, 1994, the Board of Directors  approved a resolution to
end any further  acquisitions  by the  investors  and to close out the  investor
obligations.

         At  October  31,  1996,   U.S.   $84,411,829  of  debentures  and  U.S.
$28,137,367 Class A shares were issued and outstanding.

         Under Amendment No. 4 to the Unit Subscription  Agreement dated May 15,
1995,  in 1995  the  Company  is  permitted  to  expend  all of its  funds  from
operations  after debt  servicing and all  applicable  corporate tax, on capital
enhancements,  repairs and maintenance. In 1996 and subsequent years, subject to
approval by eighty  percent of all  shareholders,  the Company is  permitted  to
expend  two-thirds  of its funds from  operations  after debt  servicing and all
applicable corporate tax on capital enhancements, repairs and maintenance.

                                      F-44
<PAGE>


                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)






3.  Capital Assets

                                                         October 31
                                              ---------------------------------
                                                   1995                1996
                                              -------------       -------------

Oil and Gas Properties:
   Cost ................................      $  43,361,000       $  44,963,000
   Accumulated depletion ...............        (24,540,000)        (28,197,000)
                                              -------------       -------------
                                                 18,821,000          16,766,000
                                              -------------       -------------

Tangible Production Equipment:
   Cost ................................          9,402,000          10,239,000
   Accumulated depreciation ............         (4,450,000)         (5,283,000)
                                              -------------       -------------
                                                  4,952,000           4,956,000
                                              -------------       -------------
Processing Facilities:
   Cost ................................        127,696,000         133,979,000
   Accumulated depreciation ............        (23,374,000)        (31,844,000)
                                              -------------       -------------
                                                104,322,000         102,135,000
                                              -------------       -------------
                                              $ 128,095,000       $ 123,857,000
                                              =============       =============

         A provision for future site restoration of $1,132,347 (1995 - $779,000,
1994 - $740,000) was expensed during 1996.

4.  Deferred Financing Costs

                                                      October 31
                                              ---------------------------------
                                                   1995                1996
                                              -------------       -------------
 
Deferred financing costs ...............        $ 2,187,000         $ 2,187,000
Accumulated amortization ...............           (705,000)           (851,000)
                                                ===========         ===========
                                                $ 1,482,000         $ 1,336,000
                                                ===========         ===========

5.    Long-Term Shareholders' Debt

         The debentures are payable in U.S.  dollars fifteen years from the date
of issue which is in the period 2005 to 2008.  The  debentures  bear interest at
14% per annum payable on a quarterly basis.

         The Company is entitled,  if the after-tax  cash flow is not sufficient
to make interest  payments,  to satisfy interest payments by issuing  additional
debentures  valued at an amount equal to 100% of the principal  amount  thereof,
and Class A shares at $10.00 per share.

         The debentures are held by the Class A shareholders.

                                      F-45
<PAGE>


                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)






6.  Share Capital

Authorized

         Unlimited Class A voting common shares.

         Unlimited Class B non-voting common shares.

         The Class B shares are not  entitled  to  dividends.  Upon  payout,  as
defined in the  Company's  Articles,  each Class B share may be  converted  to a
Class A share and the Class B  shareholders  have a call option to purchase,  in
the aggregate, 25% of the then outstanding debentures at a price of U.S. $10 for
each U.S.
$75,000 principal amount of debentures.

         Class B shares  are  issued  equal to 33% of the Class A shares  issued
pursuant  to  subscription  calls.  Class B shares are issued for U.S.  $.01 per
share.

Issued for Cash
<TABLE>
<CAPTION>

                                         Class A                       Class B
                                -------------------------   -------------------------

<S>                               <C>         <C>               <C>       <C>        
Inception to October 31, 1993     2,770,599   $33,619,000       923,530   $    11,000
Issued during 1994 ..........        43,139       583,000        14,380          --
                                -----------   -----------   -----------   -----------

Balance at October 31, 1994,
   1995 and 1996 ............     2,813,738   $34,202,000       937,910   $    11,000
                                ===========   ===========   ===========   ===========
</TABLE>

7.  Administration

         Pursuant to the administration and management agreements, the following
expenses have been recorded:

                                        Year Ended October 31
                               ----------------------------------------
                                  1994           1995           1996
                               -----------    -----------    -----------

Management fees ............   $ 2,384,000    $ 2,613,000    $ 2,531,000
Administration fees ........     1,959,000      1,628,000      1,632,000
                               -----------    -----------    -----------
                                 4,343,000      4,241,000      4,163,000

Directors' fees and expenses        63,000        311,000        113,000
General corporate expenses .       550,000        400,000        299,000
                               -----------    -----------    -----------
                                 4,956,000      4,952,000      4,575,000

Recoveries .................      (996,000)      (445,000)      (458,000)
                               -----------    -----------    -----------
                               $ 3,960,000    $ 4,507,000    $ 4,117,000
                               ===========    ===========    ===========

                                      F-46
<PAGE>


                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)






         General  corporate  expenses  include  third-party  professional  fees,
insurance and other items of a general corporate nature.

8.  Income Taxes

         At October 31, 1996,  the Company has estimated  deductions  for income
tax purposes  which exceed the related book value by  $3,400,000,  the potential
benefit of which has not been  recognized  in these  financial  statements.  For
income tax purposes,  the Company has reported non-capital loss carryforwards of
$50,350,000 at October 31, 1996, which expire as follows: 1997 - $415,000;  1998
- - $1,658,000; 1999 - $12,543,000;  2000 - $11,991,000; 2001 - $9,061,000; 2002 -
$11,247,000; 2003 - $3,435,000.

9.  Related Party Transactions

         At times, the Company enters into agreements and  transactions  related
to gas plants and gas reserves  with Morrison  Petroleums  Ltd. and Canadian Gas
Gathering Systems II, Inc. These transactions are carried out in accordance with
industry standard terms.

         During  1995,  a  consulting  fee of $158,000 was paid to a founder and
director.

10.  Commitments

         The Company has a Management Agreement with Morrison Petroleums Ltd. to
provide  services  with  respect to  evaluation,  acquisition,  development  and
construction of projects and Consulting Agreements with two other founders.  The
Agreements  are for ten years and provide for annual  management  and consulting
fees to be paid to the three  parties  totaling 1.5% of the original cost of all
projects, subject to certain adjustments as provided in the Agreements.

         The Company has an  Administration  Agreement with Morrison  Petroleums
Ltd. to provide  administrative  functions to the Company. This Agreement is for
ten  years  and  provides  for an  annual  administration  fee of 5% of the  net
operating income as defined in the agreement.

         Under these  agreements,  fees were incurred and accrue to the founders
as follows:

                                Morrison        Gas       B. Feshbach
                             Petroleums Ltd. Systems III     & Sons
                             --------------- -----------  ------------

Year ended October 31, 1995   $3,485,000     $  485,000   $  271,000
Year ended October 31, 1996    3,363,000        513,000      287,000


                                      F-47
<PAGE>


                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)






         Of the above fees which accrued to the founders,  the following amounts
were outstanding at the periods ended as follows:

                                                   
                                  Morrison        Gas       B. Feshbach
                               Petroleums Ltd. Systems III    & Sons
                              ---------------- ----------- --------------

Year ended October 31, 1995   $ 850,000        $ 88,000    $ 40,000
Year ended October 31, 1996     616,000         131,000       1,000

         In  addition,  under  the  Administration  Agreement,   where  Morrison
Petroleums Ltd. is the operator of a gas system,  capital and operating overhead
is recovered from the Company by Morrison  Petroleums Ltd. following  guidelines
prescribed by the Petroleum Accountants Society of Canada,  Accounting Procedure
at negotiated rates.

11.  Subsequent Events

         Subsequent  to  October  31,  1996 the  Company  became a wholly  owned
subsidiary of Abraxas Petroleum  Corporation.  Prior to the change in ownership,
the Company sold its interest in the Nevis gas plant and related  facilities for
a consideration of $120,000,000,  converted its U.S. dollar  denominated debt to
Canadian dollars and repaid the debt.

         12.  Differences  Between Canadian and United States Generally Accepted
Accounting Principles

         These  financial  statements  have been  prepared  in  accordance  with
Canadian generally accepted  accounting  principles  ("Canadian GAAP") which, in
the  case  of the  Company,  conforms  with  United  States  generally  accepted
accounting principles ("US GAAP") in all material respects except as follows:

         (a)  In accordance with U.S. GAAP, exchange gains and losses arising on
              translation of long-term monetary  liabilities,  unless designated
              as a hedge,  are  included  in income  currently  instead of being
              deferred  and   amortized   over  the  lives  of  such   long-term
              liabilities.

         (b)  The  Company  has  applied   Statement  of  Financial   Accounting
              Standards  Number 109  "Accounting  for Income Taxes" ("SFAS 109")
              effective  November  1, 1992.  SFAS 109  requires  the  Company to
              account for income  taxes using the  liability  method for US GAAP
              purposes.  There was no  cumulative  effect  or effect on  current
              results as a consequence of adopting SFAS 109.


                                      F-48
<PAGE>


                    CGGS CANADIAN GAS GATHERING SYSTEMS INC.

                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)






         The impact of these changes on the Company's financial statements is as
follows:

Statement of Earnings
<TABLE>
<CAPTION>

                                                                   Year Ended October 31
                                                -------------------------------------------------------------
                                                      1994                  1995                 1996
                                                ------------------   -------------------  -------------------

<S>                                                <C>                  <C>                 <C>            
Net earnings (loss) as reported ..........         $   4,506,000        $  (3,051,000)      $      (48,000)
Foreign currency translation .............            (1,829,000)           1,893,000            1,024,000
                                                ==================   ===================  ===================
Net earnings (loss) in accordance with
   U.S. GAAP .............................         $   2,677,000       $   (1,158,000)      $      976,000
                                                ==================   ===================  ===================
</TABLE>
<TABLE>
<CAPTION>

                                                                          Increase
                                                   As Reported           (Decrease)           U.S. GAAP
                                                ------------------   -------------------  -------------------

<S>                                                   <C>                 <C>                 <C>          
         October 31, 1995
         Deferred foreign exchange loss .......       $7,882,000          $(7,882,000)        $           -
         Deficit ..............................       (4,394,000)           7,883,000           (12,277,000)

         October 31, 1996
         Deferred foreign exchange loss .......        6,858,000           (6,858,000)                    -
         Deficit ..............................       (4,442,000)           6,859,000           (11,301,000)
</TABLE>

13.  Changes in Non-cash Working Capital Components
<TABLE>
<CAPTION>

                                                                   Year Ended October 31
                                                -------------------------------------------------------------
                                                      1994                  1995                 1996
                                                ------------------   -------------------  -------------------
<S>                                                <C>                  <C>                  <C> 
Decrease (increase) in non-cash working
   capital
Operating:
   Accounts receivable                             $    (562,000)       $  (1,231,000)       $    (690,000)
   Accounts payable                                   (4,881,000)          (5,773,000)           2,866,000
                                                ------------------   -------------------  -------------------
                                                   $  (5,443,000)       $  (7,004,000)       $   2,176,000
                                                ==================   ===================  ===================

Investing:
   Accounts payable                                $           -        $           -        $           -
   Debenture interest payable to shareholders         (3,771,000)             (54,000)              (2,000)
                                                ==================   ===================  ===================
                                                   $  (3,771,000)       $     (54,000)       $      (2,000)
                                                ==================   ===================  ===================

</TABLE>

                                      F-49
<PAGE>










                          Independent Auditors' Report



To the Board of Directors of
   Enserch Exploration, Inc.

         We have  audited the  accompanying  statements  of revenues  and direct
operating  expenses of Enserch  Exploration,  Inc.'s Wamsutter Area Package (the
"Package")  (see Note 1) to be sold to  Abraxas  Petroleum  Corporation  for the
years ended December 31, 1995,  1994, and 1993.  These financial  statements are
the responsibility of the management of Enserch  Exploration,  Inc., as operator
of the  properties.  Our  responsibility  is to  express  an  opinion  on  these
financial statements based on our audits.

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

         The accompanying  statements of revenues and direct operating  expenses
reflect the revenues and direct operating  expenses  attributable to the Package
as described in Note 1 to the financial  statements and are not intended to be a
complete presentation of the revenues and expenses of the Package.

         In our opinion,  the accompanying  financial statements present fairly,
in all material  respects,  the revenues  and direct  operating  expenses of the
Package as described in Note 1 for the years ended December 31, 1995,  1994, and
1993, in accordance with generally accepted accounting principles.



DELOITTE & TOUCHE LLP

Dallas, Texas
June 26, 1996


                                      F-50
<PAGE>


               ENSERCH EXPLORATION, INC.'S WAMSUTTER AREA PACKAGE

              STATEMENTS OF REVENUES AND DIRECT OPERATING EXPENSES


                                                              Nine Months Ended
                                  Year Ended December 31       September 30
                               ---------------------------   -----------------  
                                 1993     1994       1995     1995      1996
                               -------   -------   -------   -------   -------
                                      (in thousands)            (Unaudited)

Revenues:
   Oil, gas and related
     product sales .........   $10,655   $10,171   $ 7,542   $ 5,262   $ 7,280

Direct operating expenses:
   Lease operating expense .       431       640     1,029       894       776
   Severance and
     property taxes ........     1,108     1,291     1,113       778     1,068

                               -------   -------   -------   -------   -------
                                 1,539     1,931     2,142     1,672     1,844
                               -------   -------   -------   -------   -------

                                                                       -------
Excess of revenues over
   direct operating expenses   $ 9,116   $ 8,240   $ 5,400   $ 3,590   $ 5,436
                               =======   =======   =======   =======   =======




        The accompanying notes are an integral part of these statements.


                                      F-51
<PAGE>


               ENSERCH EXPLORATION, INC.'S WAMSUTTER AREA PACKAGE

                       NOTES TO STATEMENTS OF REVENUES AND
                            DIRECT OPERATING EXPENSES


1.  The Properties

         The accompanying statements represent the revenues and direct operating
expenses attributable to the net interest in Enserch Exploration, Inc.'s ("EEX")
Wamsutter Area Package  producing wells and certain  non-producing  leases to be
sold to Abraxas Petroleum Corporation ("Abraxas"). The properties are located in
Sweetwater  and Canton County,  Wyoming.  EEX acquired the properties on June 8,
1995 when it purchased all of the capital stock of Dalen Corporation.  Effective
January 1, 1996, Dalen Corporation was merged into EEX.

         Historical financial statements reflecting financial position,  results
of  operations  and  cash  flows  required  by  generally  accepted   accounting
principles are not presented,  as such information is neither readily  available
on an individual  property  basis nor  meaningful  for the  properties  acquired
because the entire acquisition cost is being assigned to oil and gas properties.
Accordingly,  these  statements  of revenues and direct  operating  expenses are
presented  in lieu of the  financial  statements  required  under  Rule  3-05 of
Securities and Exchange Commission Regulation S-X.

         The accompanying  statements of revenues and direct operating  expenses
represent EEX's net working interest in the properties to be acquired by Abraxas
and are  presented on the full cost accrual basis of  accounting.  Depreciation,
depletion  and  amortization,  allocated  general  and  administrative  expense,
interest  expense and income,  and income taxes have been  excluded  because the
property  interests  acquired  represent  only a portion of a  business  and the
expenses incurred are not necessarily  indicative of the expenses to be incurred
by Abraxas.

2.  Contingent Liabilities

         Given the nature of the  properties  acquired and as  stipulated in the
purchase  agreement,  Abraxas  is  subject  to loss  contingencies  pursuant  to
existing or expected  environmental laws,  regulations,  and losses covering the
acquired properties.

3.  Oil and Gas Reserves (Unaudited)

         The following table of estimated proved and proved  developed  reserves
of oil and gas  related  to the  Wamsutter  Area  Package  properties  has  been
prepared  utilizing  estimates  of  period-end  reserve  quantities  provided by
independent petroleum consultants.

                                                    Oil             Gas
                                                (Bbl) (a)          (Mcf)
                                            ---------------- ----------------

         At January 1, 1993 ..............          547,125       43,339,881
            Production ...................          (65,283)      (4,498,193)
            Other changes, net ...........           28,903          553,355
                                            ---------------- ----------------
         At January 1, 1994 ..............          510,745       39,395,043
            Production ...................         (288,763)      (4,712,683)
            Other changes, net ...........        1,915,650        1,298,888
                                            ---------------- ----------------
         At January 1, 1995 ..............        2,137,632       35,981,248
            Production ...................         (303,076)      (4,285,734)
            Other changes, net ...........        l,390,493        8,838,026
                                            ================ ================
         At January 1, 1996 ..............        3,225,049       40,533,540
                                            ================ ================

                                      F-52
<PAGE>


               ENSERCH EXPLORATION, INC.'S WAMSUTTER AREA PACKAGE

                       NOTES TO STATEMENTS OF REVENUES AND
                      DIRECT OPERATING EXPENSES (CONTINUED)


                                                   Oil               Gas
                                                  (Bbl)             (Mcf)
                                            ----------------     ------------
         Proved Developed Reserves:
         At January 1, 1993 ..............           547,125      43,339,881
         At January 1, 1994 ..............           510,745      39,395,043
         At January 1, 1995 ..............         2,137,632      35,981,248
         At January 1, 1996 ..............         2,942,115      36,559,004
- ------------------

(a)  Includes  condensate  and  natural gas liquids  attributable  to  leasehold
interests of 2,655,476  Bbls for January 1, 1996 and 1,669,664  Bbls for January
1, 1995. Prior to l994, gas was not processed to extract natural gas liquids.

4. Standardized Measure (Unaudited)

         Discounted future net cash flows relating to proved gas and oil reserve
quantities  (unaudited)  have been prepared using  estimated  future  production
rates and associated production and development costs.  Continuation of economic
conditions  existing  at  the  balance  sheet  date  was  assumed.  Accordingly,
estimated  future net cash flows were computed by applying  prices and contracts
in effect at period end to  estimated  future  production  of proved gas and oil
reserve,   estimating  future   expenditures  to  develop  proved  reserves  and
estimating  costs to produce the proved  reserves based on average costs for the
period.  Average  prices used in the  computations  were: Gas (per Mcf) $2.08 in
1995, $1.45 in 1994 and $2.40 in 1993; Oil (per barrel) $11.17 in 1995, $7.22 in
1994 and $13.52 in 1993.

         Because  reserve  estimates  are  imprecise  and  changes  in the other
variables are unpredictable,  the standardized  measure should be interpreted as
indicative of the order of magnitude only and not as precise amounts.
<TABLE>
<CAPTION>

                                                    1995         1994         1993
                                                 ----------   ----------   ----------                                            
<S>                                              <C>          <C>          <C>  
Standardized Measure (in thousands):
   Future cash inflows .......................   $ 120,278    $  67,597    $ 101,445
   Future production and development costs ...     (25,971)     (17,121)     (19,710)
   Future income-tax expense .................     (16,137)     (14,873)     (25,525)
                                                 ----------   ----------   ----------
   Future net cash flows .....................      78,170       35,603       56,210
   Less 10% annual discount ..................      35,565       14,095       23,727
                                                 ----------   ----------   ----------                                         
   Standardized measure of discounted
     future net cash flows ...................   $  42,605    $  21,508    $  32,483
                                                 ==========   ==========   ==========                            
Change in Standardized Measure (in thousands):
   Sales and transfers of gas and oil
     produced, net of production costs .......   $  (5,400)   $  (8,240)   $  (9,116)
   Changes in prices, net of production and
     future development costs ................      14,280      (21,828)       4,903
   Accretion of discount .....................       2,151        3,248        3,326
   Net change in income taxes ................         190        5,765          240
   Additions, revisions and offer changes ....       9,876       10,080         (125)
                                                 ----------   ----------   ----------                                        
         Total ...............................   $  21,097    $ (10,975)   $    (772)
                                                 ==========   ==========   ==========                                       
</TABLE>


                                      F-53
<PAGE>










                         Report of Independent Auditors



Board of Directors
Abraxas Petroleum Corporation

We have audited the accompanying statements of combined oil and gas revenues and
direct operating  expenses of the Certain  Overriding  Royalty  Interests in the
Portilla Field Acquired by Abraxas Petroleum Corporation (Abraxas) for the years
ended December 31, 1994 and 1995.  These  statements are the  responsibility  of
Abraxas'  management.  Our  responsibility  is to  express  an  opinion  on  the
statements based on our audits.

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

The  accompanying  statements  of  combined  oil and  gas  revenues  and  direct
operating expenses were prepared for the purpose of complying with the rules and
regulations of the  Securities  and Exchange  Commission as described in Note 1,
and are not intended to be a complete  presentation  of the combined oil and gas
revenues and expenses of Certain  Overriding  Royalty  Interests in the Portilla
Field Acquired by Abraxas.

In our opinion, the statements referred to above present fairly, in all material
respects,  the combined oil and gas  revenues and direct  operating  expenses of
Certain  Overriding  Royalty Interests in the Portilla Field Acquired by Abraxas
for the years ended  December  31, 1994 and 1995 in  conformity  with  generally
accepted accounting principles.



                                                   ERNST & YOUNG LLP
San Antonio, Texas
August 30, 1996

                                      F-54
<PAGE>


           CERTAIN OVERRIDING ROYALTY INTERESTS IN THE PORTILLA FIELD
                    ACQUIRED BY ABRAXAS PETROLEUM CORPORATION

                   STATEMENTS OF COMBINED OIL AND GAS REVENUES
                          AND DIRECT OPERATING EXPENSES


                                                           Nine Months Ended
                              Year Ended December 31          September 30
                             -----------------------   -----------------------
                                 1994        1995        1995          1996
                             ----------   ----------   ----------   ----------
                                                              (Unaudited)

Oil and gas revenues .....   $3,529,234   $3,675,596   $2,608,169   $2,821,855

Direct operating expenses:
   Production taxes ......      908,421      835,092      590,019      621,656
                             ----------   ----------   ----------   ----------
Oil and gas revenues in
   excess of direct
   operating expenses ....   $2,620,813   $2,840,504   $2,018,150   $2,200,199
                             ==========   ==========   ==========   ==========




                             See accompanying notes.

                                      F-55
<PAGE>


           CERTAIN OVERRIDING ROYALTY INTERESTS IN THE PORTILLA FIELD
                    ACQUIRED BY ABRAXAS PETROLEUM CORPORATION

              NOTES TO STATEMENTS OF COMBINED OIL AND GAS REVENUES
                          AND DIRECT OPERATING EXPENSES

                     Years Ended December 31, 1994 and 1995
                    (Information as to the Nine Months Ended
                   September 30, 1995 and 1996 is Unaudited)


1.  Basis of Presentation

         The accompanying statements of combined oil and gas revenues and direct
operating  expenses  represents  the results from certain oil and gas  producing
properties  located  in the  Portilla  Field,  San  Patricia  County,  Texas  --
(Properties)  which were previously  owned by the Commingled  Pension Trust Fund
(Petroleum  II) (the Pension Fund) which were  acquired in  connection  with the
acquisition by Abraxas  Petroleum  Corporation  (Abraxas).  Abraxas acquired the
remaining 75% partnership  interest in Portilla-1996,  L.P., the limited partner
of which  acquired the above  interests  from the Pension Fund on March 21, 1996
and contributed such interest to the Partnership.

         Full historical  financial  statements  reflecting  financial position,
results of operations,  and cash flows required by generally accepted accounting
principles are not presented, as such information is not readily available on an
individual property basis nor meaningful for the properties acquired because the
entire   acquisition   cost  is  being  assigned  to  oil  and  gas  properties.
Accordingly,  these  statements  of  combined  oil and gas  revenues  and direct
operating  expenses are presented in lieu of the financial  statements  required
under Rule 3-05 of Regulation S-X of the Securities and Exchange Commission.

         The accompanying statements of combined oil and gas revenues and direct
operating  expenses  represent  the  net  overriding  royalty  interests  in the
Properties  to be acquired by Abraxas and are  presented on the accrual basis of
accounting. Depreciation, depletion and amortization, general and administrative
expenses,  interest  expense,  and  federal  and state  income  taxes  have been
excluded because the property  interests  acquired represent only a portion of a
business  and the  expenses  incurred  are  not  necessarily  indicative  of the
expenses to be incurred by Abraxas.

         The  unaudited  statements  of combined oil and gas revenues and direct
operating  expenses  for the  nine  months  ended  September  30,  1995 and 1996
include, in the opinion of management,  all material adjustments  (consisting of
only  normal  recurring  adjustments)  necessary  for a fair  presentation.  The
results  of the nine  months  ended  September  30,  1996,  are not  necessarily
indicative of the results to be expected for the full year.


                                      F-56
<PAGE>


           CERTAIN OVERRIDING ROYALTY INTERESTS IN THE PORTILLA FIELD
                    ACQUIRED BY ABRAXAS PETROLEUM CORPORATION

              NOTES TO STATEMENTS OF COMBINED OIL AND GAS REVENUES
                    AND DIRECT OPERATING EXPENSES (CONTINUED)





2.  Supplemental  Information  Relating  to Oil  and  Gas  Producing  Activities
(Unaudited)

         The following  table  presents the estimate of the net proved crude oil
and natural gas quantities  related to the interests in the Properties  acquired
and have been prepared utilizing the estimates of reserve quantities prepared by
independent petroleum reserve engineers.

                                               Liquid        Natural
                                            Hydrocarbons       Gas
                                            ------------    ----------
                                              (Barrels)       (Mcf)
Proved developed and undeveloped reserves:
   Balance at December 31, 1993 ..........    2,060,000     7,309,000
     Revisions of previous estimates .....      240,000    (1,374,000)
     Production ..........................     (207,000)     (256,000)
                                             ----------    ----------
   Balance at December 31, 1994 ..........    2,093,000     5,679,000
     Revisions of previous estimates .....     (245,000)   (2,290,000)
     Production ..........................     (176,000)     (497,000)
     Other changes, net ..................      306,000       681,000
                                             ----------    ----------
   Balance at December 31, 1995 ..........    1,978,000     3,573,000
     Revisions of previous estimates .....     (417,000)     (974,000)
     Production ..........................      (81,000)     (209,000)
     Other changes, net ..................      208,000        10,000
                                             ----------    ----------

   Balance at June 30, 1996 ..............    1,688,000     2,400,000
                                             ==========    ==========

Proved developed reserves:
   December 31, 1994 .....................    1,782,000     4,727,000
   December 31, 1995 .....................    1,722,000     3,378,000
   June 30, 1996 .........................    1,677,000     2,331,000

All of the above reserves are located in the United States.


                                      F-57
<PAGE>


           CERTAIN OVERRIDING ROYALTY INTERESTS IN THE PORTILLA FIELD
                    ACQUIRED BY ABRAXAS PETROLEUM CORPORATION

              NOTES TO STATEMENTS OF COMBINED OIL AND GAS REVENUES
                    AND DIRECT OPERATING EXPENSES (CONTINUED)





Standardized  Measure of Discounted Future Net Cash Flows Relating to Proved Oil
and Gas Reserves

         The following disclosures concerning the standardized measure of future
cash flows from proved  crude oil and  natural gas  reserves  are  presented  in
accordance  with  Statement  of  Financial  Accounting  Standards  No.  69.  The
standardized  measure does not purport to represent the fair market value of the
Properties'  proved  crude oil and  natural  gas  reserves.  An estimate of fair
market value would also take into account,  among other factors, the recovery of
reserves not  classified  as proved,  anticipated  future  changes in prices and
costs and a discount factor more  representative  of the time value of money and
the risks inherent in reserve estimates.

         Under the standardized  measure,  future cash inflows were estimated by
applying  prices at December 31, 1995 and June 30, 1996 to the estimated  future
production of period-end  proved  reserves.  Future cash inflows were reduced by
estimated future  production and development  costs based on period-end costs to
determine  pre-tax cash inflows.  The  Properties  are not, nor is the Owner,  a
separate tax paying entity. Accordingly,  the standardized measure of discounted
future net cash flows from proved  reserves is  presented  before  deduction  of
federal income taxes.

         Future net cash inflows  were  discounted  using a 10% annual  discount
rate to arrive at the Standardized Measure.


                                      F-58
<PAGE>


           CERTAIN OVERRIDING ROYALTY INTERESTS IN THE PORTILLA FIELD
                    ACQUIRED BY ABRAXAS PETROLEUM CORPORATION

              NOTES TO STATEMENTS OF COMBINED OIL AND GAS REVENUES
                    AND DIRECT OPERATING EXPENSES (CONTINUED)





         Set forth below is the Standardized  Measure relating to proved oil and
gas reserves for December 31, 1995 and June 30, 1996:

<TABLE>
<CAPTION>
                                              December 31                June 30
                                      ----------------------------    ------------
                                          1994            1995           1996
                                      ------------    ------------    ------------                                           
<S>                                   <C>             <C>             <C>        
Standardized Measure:
  Future cash inflows .............   $ 40,963,000    $ 43,052,000    $ 38,232,000
  Future production and development
    costs .........................     12,078,000      13,490,000      12,268,000
                                      ------------    ------------    ------------
                                        28,885,000      29,562,000      25,964,000
  Discount ........................    (11,498,000)    (10,622,000)    (11,703,000)
                                      ------------    ------------    ------------
Discounted future net cash flows
  before income taxes .............   $ 17,387,000    $ 18,940,000    $ 14,261,000
                                      ============    ============    ============

Change in Standardized Measure
(in thousands):
Standardized Measure, beginning of
period ...........................   $ 11,427,000     $ 17,387,000    $ 18,940,000
    Sales and transfers of gas and
      oil produced, net of
      production costs ...........     (2,621,000)      (2,841,000)     (1,482,000)
    Changes in prices, net of
      production and future
      development costs ..........      6,639,000        2,661,000         627,000
    Revisions of previous quantity
      estimates ..................         63,000       (3,168,000)     (4,001,000)
    Accretion of discount ........      1,854,000        1,739,000         947,000
    Additions, revisions, and
      other changes ..............         25,000        3,162,000        (770,000)
                                     ------------     ------------    ------------
Standardized Measure, end of
   period ........................   $ 17,387,000     $ 18,940,000    $ 14,261,000
                                     ============     ============    ============


</TABLE>
                                      F-59
<PAGE>













                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS



To the Stockholders and Board of Directors of
    Vessels Energy, Inc.:

We have audited the accompanying  consolidated balance sheets of Vessels Energy,
Inc. (a Delaware  corporation),  and  subsidiaries  as of December  31, 1996 and
1995,  and the related  consolidated  statements  of  operations,  stockholders'
equity and cash flows for the years then ended.  These financial  statements are
the responsibility of the Company's management. Our responsibility is to express
an opinion on these financial statements based on our audits.

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

In our opinion,  the financial  statements  referred to above present fairly, in
all  material  respects,  the  financial  position of Vessels  Energy,  Inc. and
subsidiaries  as of  December  31,  1996  and  1995  and the  results  of  their
operations  and their cash flows for the years then ended,  in  conformity  with
generally accepted accounting principles.

                                               Arthur Andersen LLP

Denver, Colorado,
    April 9, 1997.

                                      F-60
<PAGE>













                        REPORT OF INDEPENDENT ACCOUNTANTS



To the Stockholders and
Board of Directors of Vessels Energy, Inc.:

In our opinion,  the accompanying  consolidated  statements of operations,  cash
flows and  stockholders'  equity present fairly, in all material  respects,  the
results of  operations  and cash flows of Vessels  Energy,  Inc.  (successor  to
Vessels Oil & Gas Company) and its  subsidiaries for the year ended December 31,
1994,  in  conformity  with  generally  accepted  accounting  principles.  These
financial  statements are the  responsibility of the Company's  management;  our
responsibility  is to express an opinion on these financial  statements based on
our  audit.  We  conducted  our audit of these  statements  in  accordance  with
generally accepted auditing standards which require that we plan and perform the
audit to obtain reasonable  assurance about whether the financial statements are
free of material  misstatement.  An audit includes  examining,  on a test basis,
evidence  supporting the amounts and  disclosures  in the financial  statements,
assessing the  accounting  principles  used and  significant  estimates  made by
management,  and evaluating the overall  financial  statement  presentation.  We
believe  that our audit  provides a reasonable  basis for the opinion  expressed
above.



PRICE WATERHOUSE LLP

Denver, Colorado
March 27, 1995

                                      F-61
<PAGE>

<TABLE>
<CAPTION>



                      VESSELS ENERGY, INC. AND SUBSIDIARIES

                           CONSOLIDATED BALANCE SHEETS
                                 (In thousands)

                                     ASSETS


                                                                    December 31,    September 30,
                                                               -------------------  -------------
                                                                  1995      1996         1997
                                                               --------   --------   ------------                               
                                                                                     (Unaudited)
<S>                                                            <C>        <C>        <C>
Current assets:
   Cash and cash equivalents ...............................   $   --     $   --     $    991
   Accounts receivable, less allowance for
     doubtful  accounts of $346, $338 and $266 at
      December 31, 1995 and 1996 and
      September 30, 1997, respectively:
       Joint owners ........................................      2,099        238        248
       Oil and gas production sales ........................        880      1,094        472
       Gas gathering, processing and marketing .............      5,352      9,004      2,692
   Prepaid expenses and other ..............................      1,117      1,411      1,111
                                                               --------   --------   --------
     Total current assets ..................................      9,448     11,747      5,514

Property and equipment .....................................    119,060    157,853     56,997
Less accumulated depreciation, depletion and
   amortization ............................................     40,240     49,485     15,207
                                                               --------   --------   --------                                  
     Net property and equipment based on the
       successful efforts method of accounting for oil
       and gas properties ..................................     78,820    108,368     41,790

Deferred  financing  fees, net of  accumulated  amortization
  of $183,  $383 and $1,192 at December 31, 1995 and 1996,
  and September 30, 1997, respectively .....................        870        478        425
Other assets ...............................................        467        402        356
                                                               --------   --------   --------

Total assets ...............................................   $ 89,605   $120,995   $ 48,085
                                                               ========   ========   ========
</TABLE>


           The accompanying notes to consolidated financial statements
           are an integral part of these consolidated balance sheets.

                                      F-62
<PAGE>

<TABLE>
<CAPTION>

                      VESSELS ENERGY, INC. AND SUBSIDIARIES

                           CONSOLIDATED BALANCE SHEETS
                       (In thousands except share amounts)

                      LIABILITIES AND SHAREHOLDERS' EQUITY


                                                              December 31,        September 30,
                                                          ---------------------   -------------
                                                           1995         1996           1997
                                                         ---------    ---------   ------------
                                                                                  (Unaudited)
<S>                                                      <C>          <C>          <C> 
Current liabilities:
   Accounts payable and other accrued liabilities ....   $  10,687    $  14,561    $   6,248
   Oil and gas production payable ....................       1,140        1,435          436
   Accrued interest ..................................         235        1,068         --
   Income taxes payable ..............................         267            6            6
   Capital leases, current portion ...................         402          377           65
   Short-term notes payable ..........................        --          7,000         --
                                                         ---------    ---------    ---------
     Total current liabilities .......................      12,731       24,447        6,755

Long-term debt .......................................      30,750       55,051         --
Other long-term obligations ..........................       2,742        2,167        6,065
Deferred income taxes ................................         822         --           --
Capital leases, long-term portion ....................       1,584        1,231          272

Commitments and contingencies

Stockholders' equity:
   Preferred stock, par value $.10 per share -
     authorized 50,000 shares; no shares issued ......        --           --           --
   Common stock, par value $.10 per share - authorized
     500,000 shares; issued and outstanding 34,136
     shares at December 31, 1995 and 1996 and
     September 30, 1997 ..............................           3            3            3
   Additional paid-in capital ........................      43,501       43,501       43,501
   Stockholder note receivable .......................        (153)        --           --
   Accumulated deficit ...............................      (2,375)      (5,405)      (8,511)
                                                         ---------    ---------    ---------
Total stockholders' equity ...........................      40,976       38,099       34,993
                                                         ---------    ---------    ---------
Total liabilities and stockholders' equity ...........   $  89,605    $ 120,995    $  48,085
                                                         =========    =========    =========


           The accompanying notes to consolidated financial statements
           are an integral part of these consolidated balance sheets.

</TABLE>

                                      F-63
<PAGE>
<TABLE>
<CAPTION>


                      VESSELS ENERGY, INC. AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF OPERATIONS
                                 (In thousands)


                                                                                               Nine Months Ended September
                                                          Year Ended December 31,                          30,
                                                --------------------------------------------- ------------------------------
                                                    1994           1995            1996           1996            1997
                                                -------------- --------------  -------------- --------------  --------------
                                                                                                       (Unaudited)
<S>                                                <C>            <C>             <C>            <C>             <C>
Revenue:
   Oil and gas production revenues ..........      $  8,463       $ 13,804        $ 14,811       $  9,951        $  7,060
   Gas gathering, processing and marketing
     revenues ...............................        37,706         39,355          38,439         25,680          14,722
   Other ....................................           260            500             171             29             773
                                                -------------- --------------  -------------- --------------  --------------
                                                     46,429         53,659          53,421         35,660          22,555

Operating costs and expenses:
   Lease operating and production taxes .....         4,051          4,556           4,813          3,456           2,201
   Gas gathering, processing and marketing
     costs ..................................        31,620         34,034          33,365         21,708          12,929
   Depreciation, depletion and amortization
     (includes impairments of $2,600 and
     $337 in 1995 and 1996, respectively) ...         6,146         11,358           9,754          6,733           5,737
   Exploration expense ......................           223            272           1,713            300             914
   General and administrative ...............         3,095          3,399           3,238          2,413           2,223
                                                -------------- --------------  -------------- --------------  --------------
                                                     45,135         53,619          52,883         34,610          24,004
                                                -------------- --------------  -------------- --------------  --------------
Operating income (loss) .....................         1,294             40             538          1,050          (1,449)
                                                -------------- --------------  -------------- --------------  --------------

Other expense:
   Amortization of deferred financing fee ...            13            183             917            147              92
   Interest expense .........................         5,321          2,388           3,473          2,387           1,503
   Recapitalization expense .................             -          1,344               -              -               -
                                                -------------- --------------  -------------- --------------  --------------
                                                      5,334          3,915           4,390          2,534           1,595

Loss before taxes and extraordinary item ....        (4,040)        (3,875)         (3,852)        (1,484)         (3,044)
Deferred income tax benefit (provision) .....         1,537          1,579             822            690             (62)
                                                -------------- --------------  -------------- --------------  --------------
Loss before extraordinary item ..............        (2,503)        (2,296)         (3,030)          (794)         (3,106)
Extraordinary item:
   Debt extinguishment costs ................         1,503              -               -              -               -
                                                -------------- --------------  -------------- --------------  --------------

Net loss ....................................      $ (4,006)      $ (2,296)       $ (3,030)      $   (794)       $ (3,106)
                                                ============== ==============  ============== ==============  ==============
</TABLE>


           The accompanying notes to consolidated financial statements
             are an integral part of these consolidated statements.
    
                                      F-64
<PAGE>
<TABLE>
<CAPTION>


                      VESSELS ENERGY, INC. AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (In thousands)

                                                                                                       Nine Months Ended
                                                             Year Ended December 31,                     September 30,
                                                   ---------------------------------------------
                                                       1994            1995           1996           1996            1997
                                                   -------------- --------------- -------------- ------------------------------
                                                                                                          (Unaudited)
<S>                                                   <C>            <C>             <C>            <C>             <C>      
Operating Activities:
  Net loss ..................................        $ (4,006)      $ (2,296)       $ (3,030)      $   (794)       $ (3,106)
   Adjustments to reconcile net loss to net
     cash provided by (used in) operating
     activities:
       Depreciation, depletion, amortization .           6,146         11,358           9,754          6,733           5,737
       (Gain) loss on sale of oil and gas                    -              -               -              6            (593)
         properties ..........................
       Amortization of deferred financing                  473            183             917            147             102
         fees and other ......................
       Net loss from debt restructurings .....           2,358              -               -              -               -
       Changes in operating assets and
         liabilities:
         Accounts receivable .............                 290         (1,573)         (2,005)         1,028           6,924
         Prepaid expenses and other ......                 (83)           619            (294)          (143)            300
         Accounts payable and accrued                   (6,449)         3,462           4,741            599         (10,380)
           liabilities ...................
         Deferred tax liability ..........              (2,391)        (1,222)           (822)          (689)              -
         Other non-current liabilities ...                (477)         1,408            (575)          (277)          3,896
                                                   -------------- --------------- -------------- --------------  --------------
            Net cash provided by (used in)
              operating activities ...........          (4,139)        11,939           8,686          6,610           2,880

Investing Activities:
   Additions to oil and gas properties .......         (16,789)       (19,486)        (21,330)       (14,817)        (14,456)
   Proceeds from dispositions of oil and gas                 -              -               -              -          77,996
     properties ..............................
   Additions to other property and equipment .          (6,861)        (6,230)        (17,982)       (15,116)         (2,069)
   Decrease in restricted cash ...............           2,142              -               -              -               -
                                                   -------------- --------------- -------------- --------------  --------------
            Net cash provided by (used in)
              investing activities ...........         (21,508)       (25,716)        (39,312)       (29,933)         61,471

Financing Activities:
   Preferred stock dividends .................            (170)             -               -              -               -
   Common stock dividends ....................             (80)             -               -              -               -
   Issuance of common stock, net of expenses .          38,451            153               -              -               -
   Purchase and retirement of preferred stock           (3,300)          (137)              -              -               -
   Collection of stockholder note receivable .               -              -             153              -               -
   Proceeds from long-term borrowings and               35,806         13,875          43,150         26,200           8,207
     capital leases ..........................
   Payments on long-term borrowings and                (45,385)        (5,517)        (12,227)        (2,404)        (71,529)
     capital leases ..........................
   Deferred financing fees ...................          (1,049)          (128)           (450)          (473)            (38)
                                                   -------------- --------------- -------------- --------------  --------------
            Net cash provided by (used in)
              financing activities ...........          24,273          8,246          30,626         23,323         (63,360)
                                                   -------------- --------------- -------------- --------------  --------------
Increase (decrease) in cash ..................          (1,374)        (5,531)              -              -             991
Cash at beginning of period ..................           6,905          5,531               -              -               -
                                                   -------------- --------------- -------------- --------------  --------------

Cash at end of period ........................        $  5,531       $      -        $      -       $      -        $    991
                                                   ============== =============== ============== ==============  ==============
</TABLE>

           The accompanying notes to consolidated financial statements
             are an integral part of these consolidated statements.
                                      F-65
<PAGE>
<TABLE>
<CAPTION>


                                                              VESSELS ENERGY, INC. AND SUBSIDIARIES

                                                        CONSOLIDATED STATEMENTS OF CASH FLOWS (CONTINUED)
                                                                         (In thousands)


                                                                                                  Nine Months Ended
                                                         Year Ended December 31,                    September 30,
                                               ---------------------------------------------
                                                   1994           1995            1996           1996           1997
                                               -------------- -------------- --------------- -------------- --------------
                                                                                                     (Unaudited)
Supplemental disclosures

Supplemental disclosures of cash flow
   information
<S>                                               <C>            <C>            <C>             <C>            <C>     
     Interest paid                                $  4,833       $  2,191       $  2,638        $  2,469       $  2,571
                                               ============== ============== =============== ============== ==============

Supplemental schedule of noncash
   investing and financing activities
     Issuance of stock for note                   $      -       $    153       $      -        $      -       $      -
                                               ============== ============== =============== ============== ==============

</TABLE>

           The accompanying notes to consolidated financial statements
             are an integral part of these consolidated statements.


                                      F-66
<PAGE>
<TABLE>
<CAPTION>


                      VESSELS ENERGY, INC. AND SUBSIDIARIES

                 CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                                 (In thousands)


                                                                                                        
                                                                                                                  
                                                   
                                                     Preferred Stock     Common Stock   Stockholder Additional 
                                                   ------------------  -----------------   Note      Paid-In  Accumulated
                                                    Shares    Amount    Shares   Amount Receivable   Capital    Deficit   Total
                                                 -------- --------- -------- --------  ----------- ----------- ----------- --------

<S>                                                 <C>       <C>     <C>    <C>       <C>         <C>        <C>        <C>
Balance at January 1, 1994 ...................         2  $    --       11   $      1  $   --      $  7,668   $  4,693    $ 12,362
   Dividend on preferred stock ...............      --         --     --         --        --          --         (170)       (170)
   Dividend on common stock ..................      --         --     --         --        --          --          (80)        (80)
   Purchase and retirement of  preferred .....        (2)      --     --         --        --        (2,784)      (516)     (3,300)
     stock
   Issuance of common stock ..................      --         --       23          2      --        38,449       --        38,451
   Net loss ..................................      --         --     --         --        --          --       (4,006)     (4,006)
                                                --------  ---------  -------   ------  --------    --------   --------    --------
Balance at December 31, 1994 .................      --         --       34          3      --        43,333        (79)     43,257
   Issuance of common stock for cash and
     note ....................................      --         --     --         --        --           306       --           306
   Costs of issuing common stock and
     purchasing and retiring preferred stock
     in excess of costs estimated at
     December 31, 1994 .......................      --         --     --         --        (153)       (138)      --          (291)
   Net loss ..................................      --         --     --         --        --          --       (2,296)     (2,296)
                                                --------  ---------  -------   ------  --------    --------   --------    --------
Balance at December 31, 1995 .................      --         --       34          3      (153)     43,501     (2,375)     40,976
   Collection of stockholder note receivable .      --         --     --         --         153        --         --           153
   Net loss ..................................      --         --     --         --        --          --       (3,030)     (3,030)
                                                --------  ---------  -------   ------  --------    --------   --------    --------
Balance at December 31, 1996 .................      --         --       34          3      --        43,501     (5,405)     38,099
   Net loss (unaudited) ......................      --         --     --         --        --          --       (3,106)     (3,106)
                                                --------  ---------  -------   ------  --------    --------   --------    --------

Balance at September 30, 1997 (unaudited) ....      --    $    --       34   $      3  $   --      $ 43,501   $ (8,511)   $ 34,993
                                                ========  =========  =======   ======  ========    ========   ========    ========

</TABLE>

           The accompanying notes to consolidated financial statements
             are an integral part of these consolidated statements.

                                      F-67
<PAGE>







                      VESSELS ENERGY, INC. AND SUBSIDIARIES


                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

                  (Information for the nine month periods ended
                   September 30, 1997 and 1996 is unaudited)


1.     Organization and Significant Accounting Policies

Nature of Operations

             Vessels  Energy,  Inc.  ("Vessels"),  a Delaware  corporation,  was
incorporated  in  December  1995 to succeed  the  business  of Vessels Oil & Gas
Company ("VOG"), and is principally engaged in the exploration,  development and
production  of crude  oil and  natural  gas and the  gathering,  processing  and
marketing of natural gas and natural gas liquids.

             Vessels'  activities are primarily  concentrated  in the Wattenberg
Field in the  Denver-Julesberg  Basin ("D-J  Basin") of Colorado  (see Note 12).
Vessels  also  has  operations  in the  Piceance  Basin of  Colorado  and in the
Washakie and Wind River Basins of Wyoming.

Interim Results (Unaudited)

             The  accompanying  balance  sheet as of  September  30,  1997,  the
statements of operations and cash flows for the nine months ended  September 30,
1996 and 1997,  and the  statement of  stockholders'  equity for the nine months
ended  September  30, 1997 are  unaudited.  In the opinion of  management  these
interim statements have been prepared on the same basis as the audited financial
statements  and include all  adjustments  (consisting  of only normal  recurring
adjustments)  necessary for a fair presentation of the financial  position as of
September  30,  1997 and the results of  operations  and cash flows for the nine
months ended  September 30, 1996 and 1997. The results for the nine months ended
September  30,  1997  are not  necessarily  indicative  of  results  that may be
expected for the full year.

Principles of Consolidation

              The  consolidated  financial  statements  include the  accounts of
Vessels and its wholly owned subsidiaries. All significant intercompany balances
and transactions are eliminated in consolidation.

Cash and Cash Equivalents

              All of Vessels'  cash  investments  are of a highly  liquid nature
with original maturities of three months or less and are therefore considered to
be cash equivalents.  The carrying amount of these cash investments approximates
fair value because of their short-term maturities.


                                      F-68
<PAGE>


Use of Estimates

              The  preparation  of  financial   statements  in  conformity  with
generally accepted  accounting  principles requires management to make estimates
and assumptions  that affect the reported  amounts of assets and liabilities and
the  disclosures  of  contingent  assets  and  liabilities  at the  date  of the
financial  statements and the reported  amounts of revenues and expenses  during
the reporting period. Actual results could differ from those estimates.

Concentration of Credit Risk

              Vessels' accounts receivable are due primarily from individuals or
companies  within the oil and gas  industry  whose  operations  are in the Rocky
Mountain region of the United States. Vessels performs credit evaluations on its
customers  and, when  appropriate,  obtains  letters of credit or prepayments to
minimize  exposure  to  credit  risk.  Vessels'  cash and cash  equivalents  are
maintained primarily at a single bank in Denver,  Colorado. These concentrations
of credit risk have not had a material  effect on the results of operations  for
Vessels.

Oil and Gas Properties

              Vessels  follows the  successful  efforts method of accounting for
its oil and gas exploration,  development and production activities.  Under this
method,  acquisition costs,  development costs and successful  exploration costs
are  capitalized.  Exploratory dry hole costs,  lease rentals and geological and
geophysical costs are expensed as incurred.  Undeveloped  leaseholds are charged
to expense when impaired, based on a property-by-property assessment. Impairment
of  capitalized  costs is recorded when the net book value of proved  properties
exceeds  the  undiscounted  future  net  revenues  from  such  properties  on  a
field-by-field  basis.  Depreciation,  depletion and  amortization  of producing
properties  and  related  equipment  is provided  using the units of  production
method.  On a  field-by-field  basis,  estimated  quantities of proved developed
reserves are used to amortize  drilling and development  costs, and total proved
reserves are used to amortize leasehold costs.

Other Property and Equipment

              Property and equipment is recorded at cost and consists of natural
gas  gathering  and  processing  facilities,   vehicles,  office  furniture  and
equipment.  Depreciation  is provided  for using the  straight-line  method over
estimated  useful  lives  ranging  from  three to thirty  years.  Impairment  of
capitalized  costs  is  recorded  when  the net  book  value  of  gathering  and
processing  facilities  exceeds the  undiscounted  future net revenues from such
facilities.  Useful lives of Vessels'  gathering and  processing  facilities are
determined  based  on the  estimated  lives  of  the  reserves  serviced  by the
facilities.

              Repair and  maintenance  costs are  charged to  expense.  Costs of
renewals or betterments are capitalized.


                                      F-69
<PAGE>


Capitalized Leases

              A portion of Vessels' compression equipment, gathering systems and
office  equipment was acquired through leases with various  financing  entities.
Vessels has capitalized those material lease transactions that meet the criteria
of Statement of Financial  Accounting Standards No. 13, as amended, by recording
an asset and related  obligation  under the capital lease. The cost of the asset
recorded  and the related  liability is based upon the lesser of the fair market
value of the  asset or the  present  value of  future  minimum  lease  payments.
Interest expense is recognized on capitalized  lease obligations based either on
the interest rate implicit in the lease or Vessels' incremental borrowing rate.

Impairment of Long-Lived Assets

              In  1996  Vessels  adopted   Statement  of  Financial   Accounting
Standards No. 121,  "Accounting for the Impairment of Long-Lived  Assets and for
Long-Lived  Assets to Be Disposed Of" ("SFAS 121").  SFAS 121, which established
accounting   standards  for  the  impairment  of  long-lived   assets,   certain
identifiable intangibles and goodwill, requires a review for impairment whenever
circumstances  indicate  that  the  carrying  amount  of an  asset  may  not  be
recoverable.  In performing  the review for  recoverability,  Vessels  estimates
future cash flows (undiscounted and without interest charges) expected to result
from use of an asset and its eventual disposition. Impairment is only recognized
if the carrying  amount of an asset is greater than the expected future net cash
flows.  The  amount of the  impairment  is based on the fair value of the asset.
Under SFAS 121, each field or facility is individually evaluated for impairment.
Adoption of the  provisions  of SFAS 121 in 1996  resulted in an  impairment  of
approximately $337,000,  which has been reflected in the accompanying Statements
of Operations.

Stock-Based Compensation

              Statement of Financial  Accounting  Standards No. 123, "Accounting
for Stock-Based  Compensation,"  encourages,  but does not require, companies to
record  compensation cost for stock-based  employee  compensation  plans at fair
value.  Vessels has chosen to continue to account for  stock-based  compensation
using the  intrinsic  value method  prescribed by  Accounting  Principles  Board
Opinion  No.  25,  "Accounting  for Stock  Issued  to  Employees,"  and  related
interpretations.

Deferred Financing Fees

              Deferred financing fees are amortized over the term of the related
loan on a straight-line  basis as a component of interest  expense.  Unamortized
deferred   financing  fees  associated  with  prior  loan  agreements  that  are
refinanced  before  maturity  are written off and  presented  as a component  of
interest  expense in the Statements of Operations.  During 1994,  1995 and 1996,
Vessels  amortized  $13,000,  $183,000 and $200,000,  respectively,  of deferred
financing  fees.  Also,  during  1996,  Vessels  wrote off  $717,000 of deferred
financing fees in connection  with the  refinancing of its Bank Credit  Facility
(see Note 3).


                                      F-70
<PAGE>


Federal Income Taxes

              Vessels  recognizes  income  taxes under  Statement  of  Financial
Accounting  Standards No. 109,  "Accounting for Income Taxes" ("SFAS 109"). SFAS
109 requires the asset and liability  approach to  accounting  for income taxes.
The deferred tax liabilities or assets  represent taxes payable or refundable in
future years,  as measured by the provisions of enacted tax laws, or as a result
of  temporary  differences  between  the bases of  assets  and  liabilities  for
financial reporting and tax reporting  purposes.  Such differences relate mainly
to depreciable and depletable properties and intangible drilling costs.

Reclassifications

              Certain  balances  from 1994 and 1995 have been  reclassified  for
comparative purposes.

Goodwill

              At December 31,  1994,  goodwill  was being  amortized  over forty
years using the straight-line  method. At December 31, 1995,  Vessels determined
that the remaining  balance of goodwill had no future  value,  and the remaining
balance was amortized to expense.

Capitalized Interest

              Interest costs of $96,000,  $124,000 and $50,261 were  capitalized
to construction projects during 1994, 1995 and 1996, respectively.

Gas Balancing

              Vessels enters into gas balancing  arrangements for the difference
between sales of natural gas and its proportionate share of production.  Vessels
follows the sales method to account for gas imbalances and records revenue based
on sales,  regardless of its proportionate share of the related  production,  as
long as the estimated recoverable reserves are sufficient to allow the undersold
party, be it Vessels or other interest  owners,  to recover their pro-rata share
from future  production.  At December 31, 1995 and 1996,  Vessels' gas balancing
position was insignificant in relation to its remaining natural gas reserves.

2.     Property and Equipment

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

                                                December 31,
                                            --------------------
                                              1995        1996
                                            ---------   --------
                                               (in thousands)

Oil and gas producing properties .........   $ 79,483   $100,468
Undeveloped leaseholds ...................      1,832      1,658
Gas gathering and processing facilities ..     33,230     50,424
Other property and equipment .............      4,515      5,303
                                             --------   --------

                                             $119,060   $157,853
                                             ========   ========

                                      F-71
<PAGE>


3.     Long-Term Debt

              In July 1996, Vessels entered into a $75,000,000  revolving credit
facility with a commercial  bank  syndicate,  which replaced  Vessels'  previous
credit facility.  Borrowings  available under the credit facility are limited to
semiannual  borrowing  base  determination  amounts.  The borrowing  base on the
revolving  credit facility as of December 31, 1996 was  $64,000,000.  Borrowings
under the agreement bear  interest,  at Vessels'  option,  either at prime or at
LIBOR plus 1.25% - 1.65% based on the total amount of debt outstanding under the
facility.  On December 31, 1996, the weighted  average  interest rate was 7.27%.
Interest is paid  quarterly,  and  principal  payments are scheduled to begin on
July 1, 1999, and are due in equal quarterly  installments through May 31, 2003.
The credit agreement, which is secured by virtually all of the Company's assets,
contains typical covenants that restrict  distributions,  additional  borrowings
and exploration  expenditures,  and require the maintenance of certain financial
ratios.  At December  31,  1996,  Vessels'  current  ratio was below the minimum
required by the credit  agreement.  Vessels  received a waiver for this covenant
violation from the holder of the note, and anticipates  being in compliance with
all  loan  covenants  at  March  31,  1997.  Vessels  anticipates  repaying  the
outstanding balance under the credit facility in full upon completion of the D-J
Basin Sale (see Note 12).

              The following is a schedule of  maturities of Vessels'  borrowings
pursuant to its revolving credit facility (amounts in thousands):

     Year Ending December 31,
       1999................. $ 6,881  
       2000.................  13,763
       2001.................  13,763 
       2002.................  13,763
       2003.................   6,881
                             -------
       Total................ $55,051
                             =======

              Based on  borrowing  rates  available  for bank loans with similar
collateral,  the fair value of the borrowings  under Vessels'  revolving  credit
facility  at  December  31,  1996  is  estimated  to be the  carrying  value  of
$55,051,000.

              On October 2, 1996,  Vessels entered into a $7,000,000  short-term
note payable with a commercial  bank  syndicate.  This note,  as amended,  bears
interest at the rate of LIBOR plus 1.875%, and matures on April 30, 1997.


                                      F-72
<PAGE>


4.     Capital Lease Obligations

              The  following is a schedule of the property  leased under capital
leases  as of  December  31,  1996,  by major  class  of  property  (amounts  in
thousands):

     Class of property:
       Compression equipment ...................       $   1,500
       Gathering systems .......................             365
       Office equipment ........................             242
                                                       -----------
           Subtotal ............................           2,107

     Less:  Accumulated depreciation ...........            (624)
                                                       ----------- 

           Total ...............................       $   1,483
                                                       ===========

              The  following is a schedule,  by years,  of future  minimum lease
payments under capital leases together with the present value of the net minimum
lease payments as of December 31, 1996 (amounts in thousands):

     Year Ending December 31,
       1997 .....................................      $       515
       1998 .....................................              465
       1999 .....................................              444
       2000 .....................................              311
       2001 and thereafter ......................              214
                                                       -------------
     Total ......................................            1,949

     Less:  Executory costs .....................              (10)
                                                       -------------
     Net minimum lease payments .................            1,939

     Less:  Interest ............................             (331)
                                                       -------------

     Present value of net minimum lease payments       $     1,608
                                                       =============

5.     Other Non-Current Liabilities

              The  major  components  of other  non-current  liabilities  are as
follows:

                                                         December 31,
                                                  1995                1996
                                              -------------       -------------
                                                        (in thousands)

     Taxes withheld on production ....         $     1,809        $     1,533
     Other ...........................                 933                634
                                              -------------       -------------

       Total .........................         $     2,742        $     2,167
                                              =============       =============

                                      F-73
<PAGE>


6.     Stock Option Plan and Warrants

Stock Option Plan

              Vessels has a stock option plan (the  "Plan")  under which a total
of 3,804 shares of common stock may be issued upon exercise of options under the
Plan. As of December 31, 1996, a total of 2,408  nonqualified  stock options had
been granted and were outstanding at option prices ranging from $1,300 to $1,800
per share.  Substantially  all of the  options  granted  vest at 20% per year if
Vessels  meets certain  financial  targets or time and service as defined in the
Plan agreements.

              The following  summarizes stock option activity for 1995 and 1996.
Vessels accounts for the Plan in accordance with APB Opinion No. 25, under which
no compensation  expense has been recognized.  Had  compensation  cost for these
plans been determined consistent with SFAS 123, Vessels' net loss would not have
increased by a material amount.

              A summary of the status of Vessels'  stock option plan at December
31, 1995 and 1996 and changes  during the periods then ended is presented in the
table and narrative below:
<TABLE>
<CAPTION>

                                                             1995                              1996
                                               ---------------------------------- --------------------------------
                                                                  Weighted-                         Weighted-
                                                                   Average                           Average
                                                                   Exercise                          Exercise
               Fixed Options                      Shares            Price            Shares           Price
- ---------------------------------------------  -------------- ------------------- -------------- -----------------
<S>                                                 <C>            <C>                 <C>            <C>      
Outstanding at beginning of year .........              -                  -           2,208          $   1,801
Granted ..................................          2,758          $   1,801           1,504          $   1,650
Exercised ................................              -                  -               -                  -
Forfeited ................................           (550)         $   1,801          (1,304)         $   1,740
                                               --------------                     --------------

Outstanding at end of year ...............          2,208          $   1,801           2,408          $   1,740
                                               ==============                     ==============

Exercisable at end of year ...............              -                                 94
                                               ==============                     ==============
</TABLE>

              The following table summarizes information about the stock options
outstanding as of December 31, 1996:
<TABLE>
<CAPTION>

                                                   Options Outstanding                      Options Exercisable
                                          --------------------------------------- ----------------------------------------
                                              Weighted-                                 Shares
                                               Average            Weighted-           Exercisable          Weighted-
                                              Remaining            Average                At                Average
      Range of               Shares          Contractual           Exercise          December 31,           Exercise
   Exercise Prices        Outstanding            Life               Price                1996                Price
- ----------------------  ----------------- ------------------- ------------------- -------------------- -------------------

   <S>                        <C>             <C>                     <C>                 <C>                   <C>   
   $1,300                       293           6.2 years               $1,300               94                   $1,300
   $1,800                     2,115           8.25 years              $1,800                -                        -
                        -----------------                                         --------------------

   $1,300 to $1,800           2,408           7.9 years               $1,740               94                   $1,300
                        =================                                         ====================

</TABLE>
                                      F-74
<PAGE>


Warrants

              Vessels has outstanding common stock purchase warrants pursuant to
agreements  which  entitle the holder to purchase  one share of Vessels'  common
stock for each warrant held and which contain certain anti-dilution  provisions.
As a result  of stock  issued in 1994,  the  exercise  price  and the  number of
warrants  outstanding  changed. No new warrants were issued in 1995 or 1996, and
no warrants  were  exercised in 1995 or 1996.  As of December 31, 1995 and 1996,
there were a total of 266 warrants outstanding: 50 warrants at an exercise price
of $1,350 and 50  warrants  at an  exercise  price of $2,126,  both  expiring on
December 30, 2000; and, 166 warrants at an exercise price of $2,349, expiring on
December 12, 2004.

7.     Income Taxes

              The  following is a schedule of the  components  of the income tax
benefit:

                                                Year Ended
                                               December 31,
                                         ------------------------
                                          1994     1995     1996
                                         ------   ------   ------
                                              (in thousands)
Deferred taxes:
  Federal ............................   $1,335   $1,367   $  720
  State ..............................      202      212      102
                                         ------   ------   ------
                                         $1,537   $1,579   $  822
                                         ======   ======   ======

              The following  schedule shows the amounts and  classifications  of
the Vessels' deferred tax assets and liabilities:

                                            December 31,
                                        --------------------                 
                                          1995        1996        
                                        --------    --------                
                                          (in thousands)
Gross deferred tax assets:
  Loss carryforwards ................   $  6,413    $ 15,185
  Minimum tax credit carryforwards...         25          25
  Depletion carryforwards ...........        133         172
  Other .............................         92          91
  Valuation allowance ...............       --          (717)
                                        --------    --------
                                           6,663      14,756
                                        --------    --------
Gross deferred tax liabilities:
  Oil and gas properties ............     (3,621)     (9,721)
  Property and equipment ............     (4,482)     (5,530)
  Other .............................        618         495
                                        --------    --------
                                          (7,485)    (14,756)
                                        --------    --------
Net deferred income tax liability....   $   (822)   $   --
                                        ========    ========

                                      F-75
<PAGE>


              The differences  between the statutory federal income tax rate and
the Vessels' effective tax rate are summarized as follows:

                                         Year Ended
                                         December 31,
                                  ---------------------------
                                   1994      1995      1996
                                  -------   -------   -------                
                                          (in thousands)
Gross deferred tax assets:
  Computed benefit at statutory
    federal rate ..............   $ 1,374   $ 1,318   $ 1,310
  State income taxes, net of
    federal benefit ...........       133       128       126
  Other .......................        30       133       103
  Valuation Allowance .........      --        --        (717)
                                  -------   -------   -------
  Total income tax benefit ....   $ 1,537   $ 1,579   $   822
                                  =======   =======   =======

              At  December  31,  1996,   Vessels  had  a  net   operating   loss
carryforward of $40,711,447,  of which the utilization of $15,796,625 is limited
to an  approximate  annual  amount of  $1,547,000  due to a change in  ownership
occurring  as a  result  of  the  1994  stock  issuance.  Vessels  also  has  an
alternative minimum tax credit carryforward of $25,000 and a statutory depletion
carryforward of $461,000 at December 31, 1996.

              Vessels'  net  operating  loss  carryforward,  if  not  previously
utilized,  expires  at  various  dates  beginning  in 2007  (subject  to certain
limitations),  except for statutory depletion and alternative minimum tax credit
carryforwards which do not expire.

8.     Commitments and Contingencies

Operating Leases

              Vessels  leases  certain  equipment  and office  facilities  under
non-cancelable  operating leases.  Future minimum rental commitments at December
31, 1996 are as follows (amounts in thousands):

     Year Ending December 31,
       1997 .............................................       $     457
       1998 .............................................             248
       1999 .............................................               4
       2000 .............................................               -
                                                            ------------------
                                                                $     709
                                                            ==================

              Rental  expense for the years ended  December 31,  1994,  1995 and
1996 was $439,000, $427,000 and $481,000, respectively.


                                      F-76
<PAGE>


Sales Agreements

              In 1991 and 1992,  Vessels entered into sales  agreements with two
separate  companies  to  supply  natural  gas to their  respective  cogeneration
facilities  located in the front range of Colorado.  The agreements require that
Vessels supply a combined annual contract quantity of gas ranging from 2,706,000
to 3,144,000  Mmbtus for a period of 15 years beginning  January 1, 1994.  Under
the agreements, each of the purchasers is required to take or pay for 80% of the
annual  contract  quantity.  Vessels has dedicated a substantial  portion of its
proved reserves in the D-J Basin to these agreements.  The 1996 weighted average
price for these two agreements was $2.22 per Mmbtu and escalates at 3% annually.

Contingencies

              The  Environmental  Protection  Agency has  issued  administrative
orders to  certain  parties  who were  former  customers  of Weld  County  Water
Disposal,  Inc. ("WCWDI") related to their disposal of waste at facilities owned
by WCWDI  (matter of Weld  County  Waste  Disposal,  Inc.,  EPA Dockets No. RCRA
7003VIII 95-02, 95-03 and 95-04). Those parties have threatened to assert claims
against Vessels, who was also a customer of WCWDI, under a right of contribution
theory but have not filed a  complaint.  Vessels is unable to assess (a) whether
any claims  regarding this matter will be asserted,  (b) whether any claims,  if
asserted,  would be successful,  or (c) if any claims are successfully asserted,
the magnitude and amount of the claims.

              Vessels is presently engaged in voluntary  settlement  discussions
with  the  owner,   operator  and  two  other   companies   regarding   Vessels'
participation in the cleanup of the WCWDI Oil Field Waste Disposal Facility near
Ft.  Lupton,  Colorado in lieu of litigation  over the potential  claims between
Vessels and such other  companies.  Vessels has  recorded an accrual of $300,000
related  to  this  issue  and  management  believes  its  financial   statements
adequately reflect the impact of a potential settlement.

              Vessels  is  also  involved  in  various  other   litigation   and
administrative  proceedings  arising in the normal  course of  business.  In the
opinion of management,  any  liabilities  that may result from these claims will
not,  individually  or in the  aggregate,  have a  material  adverse  effect  on
Vessels' financial position or results of operations.

9.     Employee Benefit Plans

Pension and Profit Sharing

              Vessels has a 401(k)  pension and profit sharing plan which covers
all  full-time  employees  who have more than six months of  service  and allows
participants  to  contribute  up to 17% of their salary to the plan.  Vessels is
obligated to contribute 35% of each participant's contribution,  up to a maximum
employee contribution of 6%, as a matching contribution.  Amounts contributed to
the plan by employees are 100% vested when contributed  while Vessels'  matching
contributions  are subject to a 20% per year  vesting  schedule  starting in the
third  year of  participation.  Any  forfeitures  in the  plan  reduce  Vessels'
matching  contribution  obligation.  Vessels made matching  contributions to the
plan totaling  $61,000 for each of the years ended  December 31, 1994,  1995 and
1996.


                                      F-77
<PAGE>


10.    Commodity Swap Agreements

              Vessels   periodically   enters  into  futures   contracts,   swap
agreements  or  option  agreements  in  order  to hedge  its  exposure  to price
fluctuations  on the  purchase or sale of crude oil,  natural gas or natural gas
liquids.  Gains or losses  attributable  to such contracts and  agreements  that
hedge  specific  future  deliveries or purchases are deferred and  recognized in
income when the corresponding physical sale or purchase is recorded.

              Under the swap agreements, Vessels receives or makes payments to a
counterparty based on the differential between a fixed and floating price. Under
option  agreements,  Vessels will receive  payments from the counterparty if the
floating  price  is less  than a floor  price  and  will  make  payments  to the
counterparty  if the  floating  price is  greater  than the  ceiling  price.  At
December 31, 1996,  Vessels had open swap and option  agreements to hedge future
deliveries as follows:

                               Crude Oil (Mbbls)      Natural Gas
                                                        (Mmbtus)
                              ------------------- ------------------

     Year Ending December 31,
       1997 .................          214               2,390
       1998 .................          156               2,280
                             ------------------- ------------------
                                       370               4,670
                             =================== ==================

              Cash flows from hedging  activities  are  classified  as operating
activities in the Statements of Cash Flows.  Vessels realized a gain of $88,000,
and losses of $264,000 and  $3,257,000 on its hedging  activities in 1994,  1995
and  1996,  respectively.  The fair  market  value of the open  swap and  option
agreements at December 31, 1996,  using  commodity  prices in effect at December
31, 1996, was a loss of approximately $15,840,000.

              Vessels is exposed to credit  loss in the event of  nonperformance
by  counterparties  on these swap or option  agreements  but does not anticipate
nonperformance by such counterparties.  The amount of such exposure is generally
equal to the amount of Vessels' unrealized gains, if any, in such swap or collar
agreements.

11.    Significant Customers

              During  1994,  1995  and  1996,  sales  to an  unrelated  customer
accounted for approximately 20%, 14% and 6% of total revenue,  respectively.  It
is not expected  that the loss of this customer  would cause a material  adverse
impact on  operations  since  alternative  markets  for  Vessels'  products  are
available.


                                      F-78
<PAGE>


12.    Subsequent Events

D-J Basin Sale

              Effective  February 28, 1997, Vessels executed a Purchase and Sale
Agreement  whereby  the  Company  sold its DJ  Basin  assets  to North  American
Resources  Company  for  approximately  $80,000,000.  The sale will  include all
leases and reserves, as well as all production,  transportation,  and processing
equipment owned by Vessels in the D-J Basin.

Merger

       On November  12,  1997,  Vessels  entered  into a Merger  Agreement  with
Abraxas  Petroleum  Corporation  ("Abraxas")  whereby the Company will  exchange
shares of its common  stock for shares of Abraxas  Common  Stock.  The Merger is
expected to close on February 15, 1998 and be effective February 15, 1998.

Monetization

              In February 1997,  Vessels  entered into an agreement with a third
party (the "Third  Party") to monetize  (the  "Monetization")  its interest in a
long-term  gas  sales  agreement  (the  "Sales  Agreements"  - see  Note  8) for
approximately  $6  million.  Under  terms of the Sales  Agreements,  Vessels had
dedicated  certain  reserves  in the D-J Basin to satisfy  delivery  obligations
under  the Sales  Agreements.  In  conjunction  with the  Monetization,  Vessels
obtained a release of dedicated D-J Basin reserves from the original purchaser.

              As part of the Monetization,  Vessels assigned its interest in the
Sales  Agreements  to the Third  Party and agreed to supply the Third Party with
gas volumes  sufficient  to cover the  "Annual  Contract  Quantity"  obligations
(approximately 1,537,000 Mmbtus) under the Sales Agreements. Ninety-five percent
of the Annual  Contract  Quantity will be delivered to the Third Party at prices
of $1.85, $1.70 and $1.65 per Mmbtu in 1997, 1998 and 1999, respectively, and at
escalated prices,  as defined,  in years 2000 - 2008. Five percent of the Annual
Contract  Quantity  will be  delivered to the Third Party at prices of $2.16 per
Mmbtu in 1997 - 1999 and at escalated prices, as defined, for years 2000 - 2008.
Management  believes that Vessels has  sufficient  remaining  reserves after the
sale of its D-J Basin assets to meet its delivery obligations to the third party
and anticipated  meeting its delivery  obligation to the third party through the
production of such reserves.  However,  from time to time, Vessels may also make
purchases  of gas on the open  market  at  market  prices  to meet its  delivery
obligations to the third party.

13.    Supplemental Oil and Gas Disclosures (Unaudited)

              Vessels' oil and gas operations are conducted solely in the United
States.  The following  information is presented in accordance with Statement of
Financial  Accounting  Standards No. 69, "Disclosure about Oil and Gas Producing
Activities" ("SFAS 69").


                                      F-79
<PAGE>


Oil and Gas Related Costs and Operating Results

              The following tables set forth capitalized  costs,  costs incurred
and  operating  results  for oil and gas  producing  activities  for the periods
presented:

                                              December 31,
                                           1995         1996
                                        ---------    ---------                 
                                           (in thousands)
Capitalized Costs:
  Proved oil and gas properties .....   $  79,483    $ 100,468
  Unproved properties ...............       1,832        1,658
                                        ---------    ---------
    Total ...........................      81,315      102,126

  Accumulated depletion, depreciation
    and amortization ................     (33,038)     (40,311)
                                        ---------    ---------

      Net capitalized costs .........   $  48,277    $  61,815
                                        =========    =========


                                 Year Ended December 31,
                               ---------------------------
                                 1994      1995     1996
                               -------   -------   -------                    
                                      (in thousands)
Costs Incurred:
  Property acquisition costs:
    Proved ..................   $ 4,567   $ 1,340   $ 1,352
    Unproved ................     1,147     1,182     1,550
                                -------   -------   -------

                                $ 5,714   $ 2,552   $ 2,902
                                =======   =======   =======

  Exploration costs .........   $   225   $   272   $ 1,713
  Development costs .........    11,075    16,078    18,428
                                -------   -------   -------

                                $11,300   $16,350   $20,141
                                =======   =======   =======


                                                   Year Ended December 31,
                                             --------------------------------
                                               1994        1995       1996
                                             --------    --------    -------- 
                                                      (in thousands)
Operating Results:
  Revenues ...............................   $  8,463    $ 13,804    $ 14,811
  Production costs .......................     (4,051)     (4,556)     (4,813)
  Depletion, depreciation and amortization
                                               (4,934)     (7,880)     (7,577)
  Exploration expense ....................       (223)       (272)     (1,713)
                                             --------    --------    --------
                                                 (745)      1,096         708
  Income tax (provision) benefit .........        255        (373)       (234)
                                             --------    --------    --------

                                             $   (490)   $    723    $    474
                                             ========    ========    ========

                                      F-80
<PAGE>


Oil and Gas Reserves (Unaudited)

              The following  estimates of proved oil and gas reserve  quantities
have been  calculated  pursuant  to the  Securities  and  Exchange  Commission's
("SEC")  definition  of proved  reserves.  Estimated  proved oil and gas reserve
quantities  at December 31,  1994,  1995 and 1996 were  prepared by  Netherland,
Sewell & Associates, Inc., independent petroleum engineers.

              Proved oil and gas reserves are the estimated  quantities of crude
oil,  natural gas and natural gas liquids that geological and  engineering  data
demonstrate  with  reasonable  certainty to be  recoverable in future years from
known  reservoirs  under  existing  economic and  operating  conditions.  Proved
developed  reserves  are reserves  that can be expected to be recovered  through
existing wells with existing equipment and operating methods.

              The following  schedule  summarizes  the changes in Vessels' total
proved oil and gas  reserves for the years ended  December  31,  1994,  1995 and
1996:

                                                   Natural             Crude
                                                     Gas                Oil
                                                    (Mmcf)             (Mbbls)
                                                   ---------          --------

     Total Proved Reserves:
       Estimated quantity, December 31, 1993 ...    45,206              2,418
       Revisions of previous estimates .........    14,674              1,818
       Purchases of reserves in place ..........     8,398                708
       Production ..............................    (4,162)              (203)
                                                   ---------          ---------
       Estimated quantity, December 31, 1994 ...    64,116              4,741

       Revisions of previous estimates .........    (2,199)            (1,319)
       Purchases of reserves in place ..........       609                 73
       Sales of reserves in place  .............    (1,475)               (91)
       Production ..............................    (5,664)              (279)
       Extensions and discoveries ..............     2,394                243
                                                   ---------           --------
       Estimated quantity, December 31, 1995 ...    57,781              3,368

       Revisions of previous estimates .........    15,370              1,363
       Purchases of reserves in place ..........     4,699                 18
       Sales of reserves in place ..............      (302)                (5)
       Production ..............................    (5,922)              (299)
       Extensions and discoveries ..............    24,828                338
                                                   ---------           --------

       Estimated quantity, December 31, 1996 ...    96,454              4,783
                                                   =========           ========
       Estimated quantity after D-J Basin Sale
         (see Note 12), December 31, 1996 ......    44,296              1,596
                                                   =========           ========
       Proved Developed Reserves:
         December 31, 1995 .....................    40,458              1,726
                                                   =========           ========

         December 31, 1996 .....................    54,222              2,024
                                                   =========           ========
       Remaining Proved Developed Reserves
          after D-J Basin Sale (see
          Note 12), December 31, 1996 ..........    19,069                954
                                                   =========           ========

                                      F-81
<PAGE>


Standardized Measure

              Estimated  discounted  future net cash flows and  changes  therein
were  determined in accordance with SFAS 69. Future cash inflows are computed by
applying year-end prices,  unless a different price is otherwise  specified by a
contractual  agreement,  to Vessels'  estimated  quantities of proved  reserves.
Future cash outflows related to development and production costs are computed by
estimating  the  expenditures  to be incurred in  developing  and  producing the
proved oil and gas reserves at the end of the year,  based on year-end costs and
assuming  continuation of existing  economic  conditions.  A discount rate of 10
percent  per year is used to reflect  the  timing of the future net cash  flows.
Future income taxes were determined by applying the statutory income tax rate to
the difference  between the future pre-tax cash flows related to proved reserves
and deductions for the tax basis in proved properties, including the utilization
of net operating loss, depletion and other carryforwards.

              Reserve estimates are subject to numerous  uncertainties  inherent
in  estimating  quantities  of proved  reserves and in the  projection of future
rates of production and the timing of development expenditures.  The accuracy of
such estimates is a function of the quality of available data and of engineering
and  geological  interpretation  and judgment.  Results of subsequent  drilling,
testing and production may cause either upward or downward revisions of previous
estimates.  Further,  the  volumes  considered  to be  commercially  recoverable
fluctuate  with  changes  in  prices  and  operating   costs.   Because  of  the
aforementioned factors,  reserve estimates are generally less precise than other
financial statement disclosures.

              Discounted   future  cash  flow  estimates  are  not  intended  to
represent  an estimate of the fair market  value of Vessels'  proved oil and gas
reserves. An estimate of fair market value would take into account,  among other
things,  the  recovery  of reserves  in excess of proved  reserves,  anticipated
future changes in prices and costs, and a discount factor more representative of
the time value of money and the risks inherent in reserve estimates.

             The  following  table  presents  Vessels'  standardized  measure of
discounted future net cash flows related to Vessels' proved oil and gas reserves
as of December 31, 1994, 1995 and 1996:
<TABLE>
<CAPTION>

                                                                       December 31,
                                                 ----------------------------------------------------------
                                                       1994                1995                1996
                                                 ------------------  ------------------ -------------------
                                                                      (in thousands)

<S>                                                  <C>                 <C>                <C>        
     Future cash inflows ......................      $   189,755         $   170,147        $   419,075
     Future production costs ..................          (55,011)            (43,966)          (100,770)
     Future development costs .................          (44,025)            (26,429)           (61,450)
     Future income tax expense ................          (19,972)            (22,222)           (73,663)
                                                 ------------------  ------------------ -------------------
     Future net cash flows ....................           70,747              77,530            183,192

     10% annual discount for estimated timing of
       cash flows .............................          (37,528)            (34,247)           (84,645)
                                                 ------------------  ------------------ -------------------

     Standardized measure of discounted future
       net cash flows .........................      $    33,219         $    43,283        $    98,547
                                                 ==================  ================== ===================
</TABLE>

                                      F-82
<PAGE>


              The following are principal sources of changes in the standardized
measure of discounted  future net cash flows for oil and gas  properties for the
years ended December 31, 1994, 1995 and 1996:
<TABLE>
<CAPTION>

                                                                           Year Ended December 31,
                                                          ----------------------------------------------------------
                                                                1994                1995                1996
                                                          ------------------ ------------------- -------------------
                                                                               (in thousands)

<S>                                                           <C>                <C>                 <C>        
     Standardized measure, beginning of year .........        $    22,251        $    33,219         $    43,283
     Sales and transfers of oil and gas produced,
       net of production costs ........................            (4,411)            (9,248)             (9,998)
     Net changes in prices and production costs .......             4,248              5,606              45,863
     Extensions and discoveries, net of future production
       and development costs ..........................                 -              3,845              17,720
     Purchases of reserves in place ...................            10,554                824               1,321
     Sales of reserves in place .......................                 -               (959)               (180)
     Changes in estimated future development
       costs ..........................................           (29,948)             7,398             (24,245)
     Development costs incurred during the year which
       reduced future development costs ...............            11,075              9,644               4,133
     Revisions of previous quantity estimates .........            19,463             (7,765)             35,751
     Accretion of discount ............................             3,161              4,247               5,306
     Net change in income taxes .......................               398               (527)            (25,881)
     Changes in rates of production and other .........            (3,572)            (3,001)              5,474
                                                          ------------------ ------------------- -------------------

     Standardized measures, end of year ...............       $    33,219        $    43,283         $    98,547
                                                          ================== =================== ===================

</TABLE>

                                      F-83
<PAGE>
















                          AGREEMENT AND PLAN OF MERGER


                          Dated as of November 12, 1997


                                  By and Among


                          ABRAXAS PETROLEUM CORPORATION


                              VEI ACQUISITION CORP.


                                       and


                              VESSELS ENERGY, INC.








                                    ANNEX 1
<PAGE>




                                     ANNEX I
                                TABLE OF CONTENTS

                                                                      Page

RECITALS............................................................    1

ARTICLE I.                 THE MERGER...............................    1

        Section 1.01       The Merger...............................    1
        Section 1.02       Filing of Certificate of Merger and
                           Related Certificates.....................    2
        Section 1.03       Effect of Merger.........................    2
        Section 1.04       Merger Consideration.....................    3
        Section 1.05       Payment for Shares in the Merger.........    9
        Section 1.06       Fractional Shares........................   10
        Section 1.07       Dissenting Shares........................   10
        Section 1.08       Transfer of Shares After the
                           Effective Time...........................   11
        Section 1.09       Escrow Agreements........................   11
        Section 1.10       Voting Agreements........................   11
        Section 1.11       Registration Rights Agreements...........   11
        Section 1.12       Board Letter.............................   11
        Section 1.13       Calculations.............................   11

ARTICLE II.                STOCKHOLDER APPROVAL.....................   12

        Section 2.01       Stockholder Meetings.....................   12
        Section 2.02       Proxy Statement-Prospectus;
                           Registration Statement...................   13
        Section 2.03       Subsequent Event.........................   14

ARTICLE III.    REPRESENTATIONS AND WARRANTIES OF
                           THE COMPANY..............................   15

        Section 3.01       Existence and Good Standing .............   15
        Section 3.02       Capital Stock............................   15
        Section 3.03       Corporate Authority......................   15
        Section 3.04       Subsidiaries and Investments.............   16
        Section 3.05       Financial Statements and No
                           Material Changes.........................   16
        Section 3.06       Books and Records........................   17
        Section 3.07       Title to Properties; Encumbrances........   17
        Section 3.08       Real Property............................   18
        Section 3.09       Oil and Gas Reserve Report...............   18
        Section 3.10       Title to Interests.......................   18
        Section 3.11       Compliance with Leases and Laws..........   19
        Section 3.12       Sale of Production.......................   22
        Section 3.13       Status of Wells..........................   22
        Section 3.14       Tax Partnerships.........................   23
        Section 3.15       Equipment................................   23
        Section 3.16       Material Contracts.......................   23
        Section 3.17       Restrictive Documents....................   24
        Section 3.18       Litigation...............................   24
        Section 3.19       Taxes....................................   25
                                       i
                                    ANNEX I
<PAGE>

        Section 3.20       Insurance................................   25
        Section 3.21       Intellectual Properties..................   25
        Section 3.22       Compliance With Laws.....................   26
        Section 3.23       Accounts Receivable......................   26
        Section 3.24       Employment Relations.....................   26
        Section 3.25       Employee Benefit Programs................   27
        Section 3.26       Interests in Clients, Suppliers, Etc.....   30
        Section 3.27       Bank Accounts and Powers of Attorney.....   30
        Section 3.28       No Changes Prior to Closing Date.........   30
        Section 3.29       Broker's or Finder's Fees................   31
        Section 3.30       Copies of Documents......................   31
        Section 3.31       Environmental Matters....................   31
        Section 3.32       No False or Misleading Statements........   33
        Section 3.33       Disclosure...............................   34
        Section 3.34       Disclaimer of Representations and
                           Warranties of the Company................   34

ARTICLE IV.     REPRESENTATIONS OF ABRAXAS AND SUB..................   34

        Section 4.01       Existence and Good Standing of Abraxas...   34
        Section 4.02       Existence and Good Standing of Sub.......   35
        Section 4.03       Existence and Good Standing of
                           Canadian Abraxas.........................   35
        Section 4.04       Corporate Authority......................   35
        Section 4.05       Broker's or Finder's Fees................   36
        Section 4.06       Capital Stock............................   36
        Section 4.07       Books and Records........................   36
        Section 4.08       Litigation...............................   36
        Section 4.09       Taxes....................................   37
        Section 4.10       Copies of Documents......................   37
        Section 4.11       Reports with the Securities and 
                           Exchange Commission......................   37
        Section 4.12       Restrictive Documents....................   38
        Section 4.13       Title to Properties; Encumbrances........   38
        Section 4.14       Oil and Gas Reserve Report...............   39
        Section 4.15       Title to Interests.......................   39
        Section 4.16       No False or Misleading Statements........   40
        Section 4.17       Disclosure...............................   40
        Section 4.18       Disclaimer of Representations and
                           Warranties of Abraxas and Sub............   40

ARTICLE V.      COVENANTS...........................................   41

        Section 5.01       Conduct of Business of the Company
                           and Abraxas..............................   41
        Section 5.02       Exclusive Dealing........................   42
        Section 5.03       Review of the Company and Abraxas........   42
        Section 5.04       Regulatory and Other Filings
                           and Approvals............................   43
        Section 5.05       Best Efforts.............................   43
        Section 5.06       Affiliate Agreements.....................   43
        Section 5.07       Public Announcements.....................   44
        Section 5.08       Tax-Free Reorganization..................   44
        Section 5.09       Nasdaq Quotation.........................   44
        Section 5.10       Issuance of Securities...................   44
        Section 5.11       Benefit Plans and Related Matters........   44
  
                                       ii
                                    ANNEX I
<PAGE>

        Section 5.12       Indemnification; Directors' and Officers'
                           Insurance................................   45
        Section 5.13       New Execution Officers and Directors.....   47

ARTICLE VI.     CONDITIONS TO ABRAXAS' OBLIGATIONS..................   47

        Section 6.01       Opinion of Company Counsel...............   48
        Section 6.02       Good Standing and Tax Certificates.......   48
        Section 6.03       No Material Adverse Change...............   48
        Section 6.04       Truth of Representations and
                           Warranties...............................   48
        Section 6.05       Performance of Agreements................   49
        Section 6.06       No Litigation Threatened.................   49
        Section 6.07       Governmental Approvals...................   49
        Section 6.08       Intra-Company Debt.......................   49
        Section 6.09       Proceedings..............................   49
        Section 6.10       Escrow Agreements........................   49
        Section 6.11       Stockholder Approval.....................   49
        Section 6.12       Effectiveness of S-4 Registration
                           Statement................................   49
        Section 6.13       Affiliate Agreements.....................   50
        Section 6.14       Dissenters' Rights.......................   50
        Section 6.15     Options and Warrants.......................   50
        Section 6.16       Vessels Stockholder Agreement............   50
        Section 6.17       Bank of Montreal.........................   50

ARTICLE VII.    CONDITIONS TO COMPANY'S OBLIGATIONS.................   50

        Section 7.01       Opinion of Purchaser's Counsel...........   50
        Section 7.02       Truth of Representations
                           and Warranties...........................   50
        Section 7.03       Governmental Approvals...................   51
        Section 7.04       Escrow Agreements........................   51
        Section 7.05       Registration Rights Agreements...........   51
        Section 7.06       Letter Agreement.........................   51
        Section 7.07       No Material Adverse Change...............   51
        Section 7.08       No Litigation Threatened.................   51
        Section 7.09       Good Standing and Tax Certificates.......   51
        Section 7.10       Performance of Agreements................   52
        Section 7.11       Proceedings..............................   52
        Section 7.12       Effectiveness of S-4 Registration
                           Statement................................   52
        Section 7.13       Stockholder Approval.....................   52
        Section 7.14       Opinion of Company's Counsel.............   52
        Section 7.15       Director Approval........................   53
        Section 7.16       Nasdaq Listing...........................   53
        Section 7.17       Waivers and Consents......................  53

ARTICLE VIII.   SURVIVAL OF REPRESENTATIONS; RECOVERY...............   53

        Section 8.01       Survival of Representations..............   53
        Section 8.02       Claims...................................   53


  
                                       iii
                                    ANNEX I
<PAGE>


ARTICLE IX.     CLOSING      54

        Section 9.01       Deliveries at the Closing................  54
        Section 9.02       Time and Place...........................  54

ARTICLE X.      MISCELLANEOUS.......................................  54

        Section 10.01      Knowledge................................  54
        Section 10.02      Expenses.................................  54
        Section 10.03      Governing Law............................  54
        Section 10.04      "Person" Defined.........................  54
        Section 10.05      Captions.................................  55
        Section 10.06      Publicity................................  55
        Section 10.07      Notices..................................  55
        Section 10.08      Parties in Interest......................  56
        Section 10.09      Counterparts.............................  56
        Section 10.10      Entire Agreement.........................  56
        Section 10.11      Amendments...............................  56
        Section 10.12      Severability.............................  56
        Section 10.13      Third Party Beneficiaries................  56
        Section 10.14      Termination of Agreement.................  57
        Section 10.15      Procedure for Termination................  57
        Section 10.16      Fees.....................................  58
        Section 10.17      Schedules................................  59
        Section 10.18      Conspicuous Disclaimers..................  59

                                      iii
                                     ANNEX I
<PAGE>


EXHIBITS

        EXHIBIT A                 Certificate of Merger
        EXHIBIT B                 Certificate of Incorporation
        EXHIBIT C                 Bylaws
        EXHIBIT D                 Escrow Agreements
        EXHIBIT E                 Voting Agreements
        EXHIBIT F                 Registration Rights Agreements
        EXHIBIT G                 Letter Agreement
        EXHIBIT H                 Opinion of King & Spalding
        EXHIBIT I                 Opinion of Cox & Smith Incorporated

SCHEDULES

        Schedule 1.04Book and Contingent Liabilities; Hedges;
                                  Employee Severance Costs; Tangible Assets
        Schedule 1.04(e)Development Plan
        Schedule 3.02Capital Stock
        Schedule 3.04Subsidiaries and Investments
        Schedule 3.06Books and Records
        Schedule 3.07Title  to  Properties; Encumbrances
        Schedule 3.08Real Property
        Schedule 3.10Title to Interests
        Schedule 3.11Compliance  with Leases and Laws
        Schedule 3.12Sale of Production
        Schedule 3.13Status of Wells 
        Schedule 3.16Material Contracts
        Schedule 3.17Restrictive Documents
        Schedule 3.18Litigation
        Schedule 3.20Insurance
        Schedule 3.21Intellectual Property
        Schedule 3.23Accounts Receivable
        Schedule 3.24Employment Relations
        Schedule 3.25List of Plans
        Schedule 3.26Interests in Clients, Suppliers,  Etc.
        Schedule 3.27Bank  Accounts  and  Powers of  Attorney
        Schedule 3.28No  Changes  Prior to  Closing
        Schedule 3.29Broker's or Finder's Fees 
        Schedule 3.31Environmental  Matters
        Schedule 4.06Capital Stock
        Schedule 4.07Books and Records
        Schedule 4.08Litigation
        Schedule 4.12Restrictive Documents
        Schedule 4.13Title to Properties; Encumbrances
        Schedule 4.15Title to Interests
        Schedule 5.10Issuance of Securities


                                       v
                                    ANNEX I
<PAGE>


                                     ANNEX I
                          AGREEMENT AND PLAN OF MERGER


         This  AGREEMENT AND PLAN OF MERGER  ("Agreement")  dated as of November
12,  1997 by and  among  Abraxas  Petroleum  Corporation,  a Nevada  corporation
("Abraxas"  or  "Purchaser"),  VEI  Acquisition  Corp.,  a Delaware  corporation
("Sub"),  and Vessels  Energy,  Inc., a Delaware  corporation  ("Vessels" or the
"Company").

                              W I T N E S S E T H:

         WHEREAS, (i) Sub is a corporation organized and existing under the laws
of the State of Delaware  and is a  wholly-owned  subsidiary  of  Abraxas,  (ii)
Abraxas is a corporation  organized and existing  under the laws of the State of
Nevada, and (iii) the Company is a corporation  organized and existing under the
laws of the State of Delaware;

         WHEREAS, the Board of Directors of Abraxas, Sub and the Company deem it
advisable  and in the best  interests  of their  stockholders  that the  Company
become a  subsidiary  of Abraxas  pursuant  to the Merger (as defined in Section
1.01)  hereinafter  provided  for, and desire to make  certain  representations,
warranties and agreements in connection with such Merger; and

         WHEREAS,  for federal  income tax  purposes,  it is  intended  that the
Merger  shall  qualify as a tax-free  reorganization  within the  meaning of the
Internal Revenue Code of 1986, as amended;

         NOW,  THEREFORE,  in  consideration  of the  premises  and  the  mutual
agreements,  provisions and covenants  contained in this Agreement,  the parties
hereby agree as follows:

                                    ARTICLE I

                                   THE MERGER

         Section 1.01      The Merger.

         (a) Abraxas has caused Sub to execute and deliver,  and the Company has
executed and delivered and agrees,  subject to the terms and  conditions of this
Agreement,  to submit to its  stockholders for adoption and approval as required
under the  Delaware  General  Corporation  Law (the  "Delaware  Statute"),  this
Agreement, in accordance with Article II hereof, providing for the merger of Sub
with and into the Company  (the  "Merger")  and the  conversion  of  outstanding
shares of the Common  Stock,  par value  $0.10 per share,  of the  Company  (the
"Stock" or "Shares") as set forth  herein.  The Company  shall be the  surviving
corporation  (the  "Surviving  Corporation")  in the Merger  and shall  become a
wholly-owned  subsidiary  of  Abraxas.  From and  after the  Effective  Time (as
defined in Section  1.02),  the  identity  and  separate  existence of Sub shall
cease, and the Company shall succeed, without other transfer, to all the rights,
properties, assets, debts and liabilities of Sub.

                                    ANNEX I
<PAGE>

         (b) Abraxas shall reserve  sufficient  shares of the Common Stock,  par
value $.01 per share, of Abraxas ("Abraxas Common Stock") prior to the Merger to
permit  the  delivery  of  shares  of  Abraxas  Common  Stock  to  the  existing
stockholders  of the  Company  following  the  Merger.  Each of Abraxas  and the
Company  shall use its best  efforts  to cause the Merger to be  consummated  in
accordance with the terms of this Agreement. Subject to the terms and conditions
of this Agreement,  Abraxas shall execute a formal written consent under Section
228 of the  Delaware  Statute,  as the sole  stockholder  of Sub,  adopting  and
approving this Agreement and authorizing the execution, delivery and performance
thereof by Sub.

         Section 1.02 Filing of Certificate of Merger and Related  Certificates.
Immediately  after all  conditions  to this  Agreement  have been  satisfied  or
waived,  Vessels shall file a certificate of merger  pertaining to the Merger in
substantially  the form of Exhibit A hereto (the  "Certificate  of Merger"),  or
such other  documents  necessary  to effect the  Merger in  accordance  with the
Delaware   Statute,   and  the  Merger  shall  become  effective   substantially
simultaneously  in accordance  with the terms of this  Agreement  (such time and
date are referred to herein as the "Effective Time").

         Section  1.03  Effect of Merger.  The  parties  agree to the  following
provisions with respect to the Merger:

         (a) Name of  Surviving  Corporation.  The name of the  Company,  as the
surviving  corporation in the Merger, from and after the Effective Time shall be
"Vessels Energy,  Inc.",  until changed or amended in accordance with applicable
law; and

         (b) Charter Documents.  The Certificate of Incorporation and By-laws of
Vessels  attached  hereto  as  Exhibits  B and  C,  respectively,  as in  effect
immediately   prior  to  the  Effective  Time,   shall  be  the  Certificate  of
Incorporation  and By-laws of the Company,  as the surviving  corporation in the
Merger, until changed or amended in accordance with the provisions of applicable
law.

         (c) Officers and Directors of Surviving  Corporation.  The officers and
directors of Sub  immediately  prior to the Effective  Time will be the officers
and directors of the Surviving Corporation.

         Section  1.04  Merger  Consideration.   The  manner  of  converting  or
cancelling shares of capital stock of the Company and Sub in the Merger shall be
as follows:

         (a) At the  Effective  Time,  subject to Sections  1.06 and 1.07,  each
Share issued and outstanding  immediately  prior to the Effective Time shall, by
virtue of the Merger and without  any action on the part of the holder  thereof,
be  converted  into  (x)  that  number  of  validly   issued,   fully  paid  and
nonassessable shares of Abraxas Common Stock equal to (i) the Purchase Price (as
defined below) plus the Projected Provisional Payment (as defined below) divided
by (ii) the number of Shares issued and  outstanding  at the Effective  Time and
(y) the right to receive Additional  Provisional  Payment Shares (as hereinafter

                                       2
                                    ANNEX I

<PAGE>

defined),  if any,  and the  Contingent  Cash  Payment (as defined in the Escrow
Agreement  (as  hereinafter  defined)),  if any,  each  such  right  payable  in
accordance  with  the  terms  of  Section  1.04  (b) and the  Escrow  Agreement,
respectively.  Of the shares of Abraxas  Common  Stock  issued  pursuant  to the
Projected  Provisional Payment, 25% shall be immediately issued and 75% shall be
deposited into an escrow account  established at American Stock Transfer & Trust
Company (the "Provisional  Payment Escrow") pursuant to the Provisional  Payment
Escrow  Agreement (as defined  below).  The shares of Abraxas  Common Stock into
which each Share shall be converted at the Effective Time and on the Provisional
Payment  Date  (as  hereinafter  defined),   the  Contingent  Cash  Payment  and
consideration  in lieu of fractional  shares of Abraxas Common Stock as provided
by Section 1.06 shall hereinafter be referred to as the "Merger  Consideration."
In the event that the PV-10 (as defined below) set forth in the Adjusted Reserve
Report (as defined below) is greater than 110% or less than 90% of the PV-10 set
forth in the Reserve Report (as defined  below),  then Abraxas and Vessels shall
promptly   jointly  engage  Ryder  Scott   Petroleum   Engineers,   which  shall
independently calculate the PV-10 (the "Independent  Calculation").  The results
of the  Independent  Calculation  shall be averaged with the closer of the PV-10
calculated by Netherland,  Sewall & Associates ("NSA") in the Reserve Report and
by  DeGolyer  &  MacNaughton  ("D&M")  in the  Adjusted  Reserve  Report and the
resulting  average  PV-10  (the  "Average  PV-10")  shall  be  utilized  in  the
calculation of the Purchase Price.

         (b)  Subject  to  Section  1.06,  on April 30,  1999 (the  "Provisional
Payment  Date"),  each Share  issued and  outstanding  immediately  prior to the
Effective Time shall, by virtue of the Merger and without any action on the part
of the holder  thereof,  be  entitled  to receive  pursuant  to the  Provisional
Payment  Escrow   Agreement  a  number  of  validly   issued,   fully  paid  and
nonassessable  shares  of  Abraxas  Common  Stock  equal to (x) the  Provisional
Payment  (as  defined  below)  divided  by (y) the  number of Shares  issued and
outstanding  at the  Effective  Time  minus (z) the  number of shares of Abraxas
Common  Stock  issued at the  Effective  Time with respect to each such Share in
consideration of the Projected Provisional Payment. The shares of Abraxas Common
Stock to be issued  pursuant  to the  Provisional  Payment  shall be issued  and
released  to the  Vessels  Stockholders  from  the  shares  deposited  into  the
Provisional Payment Escrow in consideration of the Projected Provisional Payment
and, if such number of shares is insufficient, from newly-issued, fully paid and
nonassessable  shares of Abraxas Common Stock ("Additional  Provisional  Payment
Shares").  If the Projected Provisional Payment exceeds the Provisional Payment,
then shares of Abraxas  Common  Stock  deposited  into the  Provisional  Payment
Escrow shall be returned to Abraxas to the extent of the difference  between the
Projected  Provisional  Payment and the  Provisional  Payment.  For  purposes of
calculating the Additional Provisional Payment Shares and the extent, if any, to
which the Projected  Provisional  Payment exceeds the Provisional  Payment,  the
Average  Price  shall  be  subject  to  adjustment  if at any time  between  the
Effective Time and the Provisional Payment Date, (i) Abraxas shall subdivide (by
reclassification,  by the issuance of a common stock  dividend or otherwise) the
outstanding  shares of Abraxas  Common  Stock,  in which case the Average  Price
shall  be   appropriately   reduced   or  (ii)   Abraxas   shall   combine   (by
reclassification  or  otherwise)  the  outstanding  number of shares of  Abraxas

                                       3
                                    ANNEX I

<PAGE>

Common  Stock into a lesser  number,  in which case the  Average  Price shall be
appropriately increased.

         (c) At the  Effective  Time,  all Shares to be  converted  into Abraxas
Common Stock pursuant to paragraph (a) of this Section 1.04 shall,  by virtue of
the Merger and without any action on the part of the holders  thereof,  cease to
be outstanding,  be cancelled and retired and cease to exist, and each holder of
a certificate  representing any such Shares ("Vessels Stock Certificates") shall
thereafter  cease to have any rights  with  respect to such  Shares,  except the
right to receive  for each of the Shares,  upon the  surrender  of such  Vessels
Stock Certificate in accordance with Section 1.05, the Merger  Consideration and
the amount of  dividends  or other  distributions  with a record  date after the
Effective Time.

         (d) At the Effective Time,  each share of Common Stock,  par value $.01
per share, of Sub issued and outstanding immediately prior to the Effective Time
shall automatically become an equal number of Shares.

         (e) For purposes of this  Agreement,  the following  capitalized  terms
shall have the meanings set forth below:

         (i)   Adjusted  Reserve  Report.  The reserve  report  effective  as of
               August 31, 1997  prepared by D&M and  performed on Vessels  using
               the same principles used in preparing the Reserve Report.

         (ii)  Average Price. $18.00 per share.

         (iii) Defensible Title. Defensible Title shall mean title which is good
               and defensible under oil and gas industry  standards,  being free
               of  major  defects  and   encumbrances   (other  than   Permitted
               Encumbrances),  the  enforcement  or  assertion  of which are not
               barred  by  limitations  and  reasonably  free of title  defects,
               which, in the aggregate would result in a material  diminution in
               the  value  which a  willing  buyer,  experienced  in oil and gas
               industry   land  title   practices,   would   otherwise  pay  for
               acquisition of such property.

         (iv)  Development   Plan.   The  plan   attached   hereto  as  Schedule
               1.04(e)(iv).

         (v)   EBITDX: Earnings before interest, taxes, depreciation,  depletion
               and amortization.

         (vi)  Material  Adverse  Effect.  A  material  adverse  effect  on  the
               business,  results of operation or financial condition of Vessels
               and the Subsidiaries (as hereinafter  defined) or Abraxas and its
               subsidiaries,  as the  case may be,  taken  as a  whole,  but not
               including   effects  that  are  applicable  to  Vessels  and  the
               Subsidiaries or Abraxas and its subsidiaries, as the case may be,
               resulting  from market  conditions  generally  in the oil and gas
               industry.

                                       4
                                    ANNEX I

<PAGE>

         (vii) NARCO Agreements.  That certain Purchase and Sale Agreement dated
               February  28,  1997  (the  "NARCO  Upstream  Agreement")  between
               Vessels Oil & Gas Company and North  American  Resources  Company
               and that certain  Purchase and Sale Agreement  dated February 28,
               1997 (the "NARCO  Downstream  Agreement") by and between  Vessels
               Hydrocarbons, Inc. and North American Resources Company.

         (viii)Non-PDP/PDNP  EBITDX.  The  EBITDX (or  projected  EBITDX for the
               wells deemed to be productive as Total  Undrilled  Locations at a
               rate  equal to the  average of the first  month's  EBITDX for the
               wells in the Proved  Undeveloped  Reserves in the Reserve  Report
               (or as  determined  by the average as described in the  Projected
               Provisional Payment)) plus any allocated fixed facility operating
               expenses  utilized in  determining  EBITDX and plus any allocated
               general,   selling  and   administration   expenses  utilized  in
               determining  EBITDX  for the  period  from  February  1,  1998 to
               January 31,  1999,  produced  or deemed to be  produced  from the
               Vessels' non-PDP/PDNP properties which are drilled in fulfillment
               of the Development Plan or constituted Total Undrilled  Locations
               in the  Development  Plan  (each as  defined  in the  Development
               Plan).

         (ix)  Permitted Encumbrances.  "Permitted  Encumbrances" shall mean (i)
               royalties,  overriding  royalties,   reversionary  interests  and
               similar burdens if the cumulative effect of such burdens does not
               and will not reduce the net revenue  interest  with  respect to a
               well or  property  below the net  revenue  interest  set forth in
               connection  with the  description  of such well or  increase  the
               working  interest with respect to such well or property above the
               working  interest set forth in connection with the description of
               such  well;   (ii)  the  terms  and  conditions  of  all  leases,
               servitudes,   production   sales   contracts,   division  orders,
               contracts for sale, purchase, exchange, refining or processing of
               hydrocarbons, unitization and pooling designations, declarations,
               orders  and  agreements,  operating  agreements,   agreements  of
               development,   area  of  mutual  interest   agreements,   farmout
               agreements,  gas  balancing  or deferred  production  agreements,
               processing agreements, plant agreements,  pipeline, gathering and
               transportation agreements,  injection, repressuring and recycling
               agreements,  salt water or other disposal agreements,  seismic or
               geophysical   permits  or   agreements,   and  other   agreements
               including,  without  limitation,  the terms and conditions of any
               and  all  contracts  and  agreements  covering  production  sales
               contracts and all other  material  contracts,  to the extent that
               such  contracts and agreements do not and will not reduce the net
               revenue  interest  of  any  well  or  property  included  in  the
               Interests (as hereinafter defined) below the net revenue interest
               set  forth in  connection  with the  description  of such well or
               increase  the  working  interest  with  respect  to such  well or
               property above the working  interest set forth in connection with
               

                                       5
                                    ANNEX I
<PAGE>

               the description of such well without a proportionate  increase in
               the net revenue  interest  with respect to such well or property;
               (iii)  easements,  rights of way,  servitudes,  permits,  surface
               leases and other  rights  with  respect  to surface  obligations,
               pipelines,  grazing,  canals, ditches,  reservoirs,  or the like,
               conditions,  covenants or other  restrictions,  and  easements of
               streets,  alleys,  highways,  pipelines,  telephone lines,  power
               lines, railways and other easements and rights of way on, over or
               in respect of any of the  Interests,  in the case of Vessels,  or
               the Abraxas  Interests,  in the case of Abraxas,  so long as they
               are not such that would have a Material Adverse Effect;  (iv) any
               preferential  purchase  rights,  required third party consents to
               assignment and similar  agreements and obligations  applicable to
               the transactions  contemplated hereby with respect to which prior
               to the Effective  Time (A) waivers or consents have been obtained
               from the appropriate person, or (B) the applicable period of time
               for  asserting  such rights has expired  without any  exercise of
               such  rights;   (v)  liens  for  taxes  or  assessments  not  yet
               delinquent or being protested in good faith by appropriate action
               brought in the normal  course;  (vi)  materialmen's,  mechanic's,
               repairman's,  employee's,  contractor's,  operator's,  and  other
               similar  liens or  charges  arising  in the  ordinary  course  of
               business (A) if they have not been filed  pursuant to law, (B) if
               filed,  they have not yet  become  due and  payable or payment is
               being  withheld as  provided  by law or (C) if their  validity is
               being  contested in good faith in the ordinary course of business
               by appropriate  action;  (vii)  approvals that are ministerial in
               nature and are customarily obtained from governmental authorities
               after the Effective Time in connection  with  transactions of the
               same  nature  as are  contemplated  hereby;  (viii)  conventional
               rights  of  reassignment   arising  in  respect  of  abandonment,
               cessation of production or expiration of leases;  (ix) all rights
               reserved to or vested in any governmental authority to control or
               regulate  any of the  Interests,  in the case of Vessels,  or the
               Abraxas Interests, in the case of Abraxas, in any manner, and all
               applicable  laws,  rules and orders of governmental  authorities;
               and  (x)  any  other  liens,  charges,  encumbrances,  contracts,
               agreements,  instruments,  obligations, defects or irregularities
               of any kind  whatsoever  that would not have a  Material  Adverse
               Effect.

         (x)   PV-10.  The  present  value  discounted  at 10% of the future net
               revenue from the proved  developed  (proved  developed  producing
               ("PDP") and proved developed  non-producing ("PDNP")) reserves of
               Vessels as determined by the Reserve Report.

         (xi)  Projected  Provisional  Payment.  The  amount of the  Provisional
               Payment  as  determined  at the  Effective  Time  based  upon the
               Non-PDP/PDNP  EBITDX set forth in the Reserve  Report;  provided,
               however,  that in the event that the Average PV-10 is utilized in
               the  calculation of the Purchase  Price,  then the average of the
               Non-PDP/PDNP   EBITDX  of  that  set  forth  in  the  Independent
               
                                       6
                                    ANNEX I
<PAGE>

               Calculation  and the  closer  of that set  forth  in the  Reserve
               Report and the Adjusted  Reserve  Report shall be utilized in the
               calculation of the Projected Provisional Payment.

         (xii) Provisional Payment. The number of shares of Abraxas Common Stock
               equal to a fraction, the numerator of which is the product of (x)
               Non-PDP/PDNP  EBITDX times (y) VEI Sharing  Percentage  times (z)
               5.33 minus the amount payable by Abraxas on behalf of the Company
               on the  Provisional  Payment  Date  to  the  firm  identified  on
               Schedule 3.29 and the denominator of which is the Average Price.

         (xiii)Purchase  Price.  The  number of shares of Abraxas  Common  Stock
               equal to a fraction,  the  numerator of which is the PV-10 or the
               Average PV-10, as the case may be,

               Plus the amount of Vessels' Working Capital at August 31, 1997;

               Minus all long term liabilities (book and contingent  liabilities
               set forth on  Schedule  1.04 (the  "Liabilities"))  at August 31,
               1997 except the  provision  for prepaid  production  revenues and
               excluding deferred taxes;

               Adjusted for the present value (at a 10% discount rate) at August
               31, 1997 of the hedges  identified on Schedule 1.04 at the prices
               utilized in the Reserve Report (the "Hedges Present Value");

               Minus the actual cost  incurred by Vessels,  if any,  pursuant to
               clause (ii) of the first  sentence of Section  1(e) of the Escrow
               Agreement;

               Plus the cash  received by Vessels  prior to the  Effective  Time
               from the sale of the assets listed on Schedule 1.04(xiii);

               Minus all employee  severance costs as set forth on Schedule 1.04
               actually paid to employees of Vessels;

               Minus all third party expenses payable by Vessels pursuant to the
               transactions  contemplated  by this  Agreement  as set  forth  on
               Schedule 1.04;

               Minus Vessels'  actual costs (the "Drilling  Costs") for drilling
               and  completing  the Wells  that are  identified  in the  Reserve
               Report as proved developed producing which had not been completed
               on August 31, 1997 (the "Uncompleted Wells");

               and the denominator of which is the Average Price.

                                       7
                                    ANNEX I
<PAGE>

         (xiv) Reserve  Report.  The reserve  report  effective as of August 31,
               1997,  performed  on Vessels and prepared by NSA which is in form
               and  substance  satisfactory  to Abraxas and D&M which  includes,
               among other  things,  the  following:  (a) up to date  production
               information  on all wells,  including  new wells drilled in 1997,
               (b) lease  operating  expenses  derived from  historic  operating
               expenses,  reviewed  by and  agreed  upon  by  Abraxas  prior  to
               execution  of this  Agreement,  (c) capital  costs  derived  from
               current industry cost structures,  reviewed by and agreed upon by
               Abraxas prior to execution of this Agreement,  (d) all gathering,
               processing,   and  transportation  expenses,  (e)  current  strip
               pricing   with   appropriate   differentials,   and  (f)   proved
               undeveloped reserves.

         (xv)  VEI Sharing Percentage.  The VEI Sharing Percentage shall be 80%.
               The Abraxas Sharing Percentage is 20%.

         (xvi) Working  Capital.  Current  assets minus current  liabilities  as
               determined  in  accordance  with  generally  accepted  accounting
               principles  consistently applied but excluding (i) the book value
               of any assets  set forth on  Schedule  1.04(xiii)  which have not
               been sold prior to the Effective  Time and (ii) the provision for
               prepaid production revenues.

         Section  1.05  Payment for Shares in the  Merger.  The manner of making
payment for Shares in the Merger shall be as follows:

         (a) At the Effective Time and on the Provisional  Payment Date, subject
to Sections 1.08 and 1.09,  Purchaser shall deposit with American Stock Transfer
& Trust  Company  (the  "Exchange  Agent"),  for the  benefit of the  holders of
Shares,  the aggregate Merger  Consideration due on such dates (the certificates
representing shares of Abraxas Common Stock comprising such Merger Consideration
(the "Purchaser Certificates")).

         (b) Subject to Sections  1.08 and 1.09,  promptly  after the  Effective
Time and on the Provisional Payment Date, the Exchange Agent shall,  pursuant to
irrevocable instructions, distribute to each holder of Shares, upon surrender to
the Exchange Agent of one or more Vessels Stock  Certificates for  cancellation,
the Merger  Consideration for each Share represented thereby, in accordance with
the  provisions of Section 1.04. If payment is to be made to a person other than
the  person  in  whose  name  the  Vessels  Stock  Certificate   surrendered  is
registered,  it  shall  be  a  condition  of  payment  that  the  Vessels  Stock
Certificate  so  surrendered  shall  be  properly   endorsed,   with  signatures
guaranteed,  or  otherwise  in  proper  form for  transfer  and that the  person
requesting such payment shall pay any transfer or other taxes required by reason
of the payment to a person other than the registered holder of the Vessels Stock
Certificate  surrendered,  or such person shall establish to the satisfaction of
Purchaser that such tax has been paid or is not applicable.  Notwithstanding the
foregoing,  neither the Exchange Agent nor any party hereto shall be liable to a
holder of Shares  for any cash,  shares of  Abraxas  Common  Stock or  dividends
thereon delivered to a public official pursuant to applicable escheat law. Until

                                       8
                                    ANNEX I
<PAGE>

surrendered  in accordance  with the  provisions  of Section 1.05,  each Vessels
Stock Certificate  representing Shares shall represent,  for all purposes,  only
the right to receive the Merger Consideration.

         (c) No dividends  or other  distributions  that are declared  after the
Effective  Time on shares of Abraxas  Common Stock and payable to the holders of
record after the  Effective  Time will be paid to persons  entitled by reason of
the  Merger to  receive  shares of  Abraxas  Common  Stock  until  such  persons
surrender their Vessels Stock Certificates.  Upon such surrender, there shall be
paid to the person in whose name the shares of Abraxas  Common  Stock are issued
any  dividends or other  distributions  having a record date after the Effective
Time and payable with respect to such shares of Abraxas Common Stock between the
Effective Time and the time of such surrender.  After such surrender there shall
be paid to the  person in whose  name the  shares of  Abraxas  Common  Stock are
issued any  dividends or other  distributions  on such shares of Abraxas  Common
Stock which shall have a record date after the Effective  Time and prior to such
surrender and a payment date after such surrender and such payment shall be made
on such  payment  date.  In no event shall the persons  entitled to receive such
dividends  or other  distributions  be  entitled  to  receive  interest  on such
dividends or other  distributions.  The Exchange  Agent shall not be entitled to
vote or exercise any rights or  ownership  with respect to the shares of Abraxas
Common  Stock  held by it from  time to time  hereunder,  except  that it  shall
receive and hold all dividends or other  distributions  paid or distributed with
respect to such  shares of Abraxas  Common  Stock for the account of the persons
entitled thereto.

         Section 1.06 Fractional  Shares. No fractional shares of Abraxas Common
Stock shall be issued in the Merger. In lieu of any such fractional shares, each
holder of Shares who would otherwise have been entitled to a fraction of a share
of  Abraxas  Common  Stock upon  surrender  of Vessels  Stock  Certificates  for
exchange  pursuant to this Article I will receive the next highest  whole number
of a share of Abraxas  Common  Stock if the fraction is greater than or equal to
 .50 and the next lowest whole  number of a share of Abraxas  Common Stock if the
fraction is less than .50.

         Section  1.07  Dissenting  Shares.  Notwithstanding  anything  in  this
Agreement to the contrary,  in the event that appraisal  rights are available in
connection  with the Merger  pursuant  to Section 262 of the  Delaware  Statute,
Shares that are issued and outstanding  immediately  prior to the Effective Time
and that are held by  stockholders  of the  Company who did not vote in favor of
the Merger and who comply with all of the relevant  provisions of Section 262 of
the Delaware Statute (the "Appraisal  Shares") shall not be converted into or be
exchangeable for the right to receive the Merger Consideration, unless and until
such holders shall have failed to perfect or shall have effectively withdrawn or
lost such right, and such holder's Shares shall thereupon be deemed to have been
converted into and to have become  exchangeable for the right to receive,  as of
the Effective Time, the Merger  Consideration  without any interest thereon. The
Company  shall  give  Abraxas  (i)  prompt  notice of any  written  demands  for
appraisal of Shares  received by the Company and (ii) the  opportunity to direct
all negotiations  and proceedings with respect to any such demands.  The Company
shall not,  without the prior written consent of Abraxas,  voluntarily  make any

                                       9
                                    ANNEX I

<PAGE>

payment with respect to, or settle or offer to settle, any such demands.

         Section 1.08 Transfer of Shares After the Effective  Time. No transfers
of Shares  shall be made on the stock  transfer  books of the Company  after the
close of business on the day prior to the date of the Effective Time.

         Section  1.09 Escrow  Agreements.  At or prior to the  Effective  Time,
Abraxas shall deposit into escrow  certificates  representing  472,222 shares of
Abraxas  Common Stock,  or 83,333 shares of Abraxas Common Stock in the event of
the Termination  (as defined in the Escrow  Agreement) of the Enron Contract (as
hereinafter  defined)  prior to the Effective  Time (the "Escrow  Shares").  The
Escrow  Shares shall be held pursuant to the  provisions of an escrow  agreement
(the  "Escrow  Agreement")  in  substantially  the form of Exhibit D-1  attached
hereto except as modified to delete the Enron  Contract  provisions in the event
of such  Termination.  The shares of Abraxas Common Stock deposited  pursuant to
the Provisional Payment Escrow shall be held pursuant to the Provisional Payment
Escrow  Agreement  in  substantially   the  form  of  Exhibit  D-2  hereto  (the
"Provisional Payment Escrow Agreement").

         Section 1.10 Voting  Agreements.  Concurrently  with the  execution and
delivery of this  Agreement and as a condition to Vessels'  willingness to enter
into this Agreement,  Robert L. G. Watson will enter into a Voting  Agreement in
substantially  the form of Exhibit  E-1  attached  hereto  (the  "Watson  Voting
Agreement") and the executive  officers and directors of Abraxas will enter into
a Voting  Agreement in  substantially  the form of Exhibit E-2  attached  hereto
(together with the Watson Voting Agreement, the "Voting Agreements").

         Section 1.11 Registration  Rights Agreements.  At the Closing,  Abraxas
and the  stockholders  of Vessels  named  therein  shall  execute  and deliver a
Registration Rights Agreements in substantially the forms of Exhibit F-1 and F-2
attached hereto (the "Registration Rights Agreements").

         Section 1.12 Board Letter. At the Closing,  Abraxas,  Robert F. Semmens
and VOG  Holdings,  LLC shall  execute  and  deliver  the  Letter  Agreement  in
substantially the form of Exhibit G attached hereto (the "Letter Agreement").

         Section 1.13 Calculations.  (a)  Simultaneously  with the execution and
delivery of this  Agreement,  the Company shall deliver  calculations of Working
Capital at August 31, 1997 and Abraxas and Sub, at their expense,  shall conduct
such  investigations  as they deem  necessary  to verify  the  accuracy  of such
calculations  (collectively,  the "Working Capital Calculation").  No later than
December 1, 1997,  Abraxas and Sub shall  furnish a statement  setting forth any
adjustments to the Working  Capital  Calculation.  In the event that Abraxas and
Sub, on the one hand, and Vessels,  on the other,  do not agree on the amount of
the Working Capital  Calculation at August 31, 1997,  within 15 days of delivery
of such  statement,  Abraxas and Vessels shall jointly engage KPMG Peat Marwick,

                                       10
                                    ANNEX I
<PAGE>

Denver, Colorado (the "Independent  Accountant"),  to review the Working Capital
Calculation.  The  determination  of  the  Working  Capital  Calculation  by the
Independent  Accountant,  which  shall  be  completed  within  15  days  of such
engagement,  shall be  utilized  in the  determination  of Working  Capital  for
purposes of calculating  the Purchase Price.  Simultaneously  with the execution
and delivery of this Agreement,  Vessels shall prepare and deliver a calculation
of the  Drilling  Costs and  Abraxas and Sub, at their  expense,  shall  conduct
within 15 days such investigations as they deem necessary to verify the accuracy
of the  calculation of the Drilling Costs. In the event that Abraxas and Sub, on
the one hand,  and Vessels,  on the other,  do not agree on the amount of any of
the  Drilling  Costs at  August  31,  1997,  within 15 days of  delivery  of the
calculation by Vessels, Abraxas and Vessels shall jointly engage the Independent
Accountant to review the Drilling Costs which are in dispute.  The determination
of the Drilling  Costs by the  Independent  Accountant  shall be utilized in the
determination  of the Drilling  Costs for purposes of  calculating  the Purchase
Price.

         (b) At least 30 days prior to the  Provisional  Payment  Date,  Abraxas
shall  prepare  and  deliver  a  calculation  of  Non-PDP/PDNP  EBITDX  (the "PP
Calculation") to the  Representative  (as defined in the Escrow  Agreement),  on
behalf of the Vessels Stockholders, and the Representative at its expense, shall
conduct such  investigations as it deems necessary to verify the accuracy of the
PP Calculation.  No later than 15 days after receipt of the PP Calculation,  the
Representative shall furnish a statement setting forth any adjustments to the PP
Calculation.  In the event that Abraxas and the  Representative  do not agree on
the amount of the PP Calculation,  no later than April 20, 1999, Abraxas and the
Representative  shall jointly  engage the  Independent  Accountant to review the
calculation,  which shall be completed  within 10 days of such  engagement.  The
determination  of the  Independent  Accountant  of the PP  Calculation  shall be
binding.  The  Vessels  Stockholders'  share of the  costs and  expenses  of the
Independent Accountant shall be deducted from the Provisional Payment pro rata.


                                   ARTICLE II

                              STOCKHOLDER APPROVAL

         Section 2.01  Stockholder  Meetings.  This Agreement shall be submitted
for adoption and approval to the stockholders of the Company and, if required by
law or the rules and regulations of the Nasdaq National Market (without reliance
on the 19.9%  alternative  referenced  in the letter  from the  Nasdaq  National
Market to counsel to Abraxas dated November 4, 1997 (the "19.9%  Alternative")),
the stockholders of Abraxas, at meetings to be duly held for that purpose by the
Company (the "Vessels Meeting") and Abraxas (the "Abraxas Meeting"). Abraxas and
the Company shall  coordinate  and cooperate  with respect to the timing of such
meetings and shall endeavor to hold such meetings on the same day and as soon as
practicable after the S-4 Registration Statement (as defined in Section 2.02) is
declared effective;  provided,  however,  that in the event that the approval of
this  Agreement  by the  stockholders  of Abraxas is not  required by law or the

                                       11
                                    ANNEX I
<PAGE>

rules and regulations of the Nasdaq  National  Market  (without  reliance on the
19.9%  Alternative),  Vessels shall hold such meeting as promptly as practicable
after it has been determined that the approval of the stockholders of Abraxas is
not so required. Subject to the fiduciary duties of the directors of the Company
and Abraxas under  applicable law, the Boards of Directors of the Company and of
Abraxas  shall  recommend  that  their  respective   stockholders  approve  this
Agreement  and the  transactions  contemplated  hereby and such  recommendations
shall be  contained  in the Proxy  Statement-Prospectus  (as  defined in Section
2.02), if any. The stockholder vote required for such approval, if any, shall be
no greater than that  required by the  applicable  requirements  of the Delaware
Statute and Title 7,  Chapter 78 of the Nevada  Revised  Statutes  (the  "Nevada
Statute") and the applicable requirements of the Certificate of Incorporation of
the Company and the  Articles  of  Incorporation  of Abraxas as in effect on the
date hereof.

         Section 2.02 Proxy  Statement-Prospectus;  Registration  Statement.  In
connection  with any  solicitations  of approval of the principal  terms of this
Agreement and the Merger by Abraxas' stockholders,  if such approval is required
by law or the rules and  regulations  of the  Nasdaq  National  Market  (without
reliance on the 19.9% Alternative),  Abraxas and the Company shall prepare,  and
Abraxas shall mail to its stockholders,  proxy solicitation materials, including
a proxy  statement  of Abraxas and  appropriate  related  forms of proxies  with
respect  to the  Abraxas  Meeting.  Such  proxy  statement,  if any,  shall also
constitute a prospectus of Abraxas with respect to the shares of Abraxas  Common
Stock to be issued in the  Merger  (such  proxy  statement  and  prospectus  are
hereinafter  referred  to as the "Proxy  Statement-Prospectus")  which,  if such
approval  of the  stockholders  of Abraxas is  required  by law or the rules and
regulations  of the  Nasdaq  National  Market  (without  reliance  on the  19.9%
Alternative),  will be  filed  by  Abraxas  with  the  Securities  and  Exchange
Commission (the  "Commission")  as part of a registration  statement on Form S-4
(the "S-4 Registration  Statement") for the purpose of registering the shares of
Abraxas Common Stock to be received in the Merger by the stockholders of Vessels
under the Securities Act of 1933, as amended (the  "Securities  Act")).  Abraxas
shall notify the Company promptly of the receipt of any comments of the staff of
the Commission (the "Staff"),  and of any request by the Staff for amendments or
supplements to the S-4 Registration Statement, the Proxy Statement-Prospectus or
for  additional  information  and Abraxas  and the Company  shall use their best
efforts to promptly  respond to and  satisfy  any  comments of the Staff and any
request by the Staff for  amendments  or  supplements.  Abraxas  and the Company
shall  cooperate to promptly file the S-4  Registration  Statement and shall use
their  reasonable  efforts  to have  the  S-4  Registration  Statement  declared
effective by the Commission;  provided,  however,  that Abraxas may withdraw the
S-4  Registration  Statement  prior to its  being  declared  effective  upon the
occurrence  of any of the events  described  in Section  2.03.  Abraxas  and the
Company  agree to correct  promptly any such  information  provided by either of
them that shall have become false or misleading  in any material  respect and to
take all steps necessary to file with the Commission and have declared effective
or cleared by the Commission any amendment or supplement to the S-4 Registration
Statement  and the Proxy  Statement-Prospectus  so as to correct the same and to
cause the Proxy  Statement-Prospectus  as so corrected to be disseminated to the
Company's stockholders and the stockholders of Abraxas to the extent required by

                                       12
                                    ANNEX I
<PAGE>

applicable    law.   The   S-4    Registration    Statement    and   the   Proxy
Statement-Prospectus  shall comply as to form in all material  respects with the
provisions of the Securities Act and other applicable law.

         Section 2.03.  Subsequent  Event.  If the  Independent  Calculation  is
necessary hereunder and the resulting Merger  Consideration would permit Abraxas
to consummate the transactions  contemplated by this Agreement  without approval
of the  stockholders  of  Abraxas  in  compliance  with the rules of the  Nasdaq
National Market (without reliance on the 19.9% Alternative),  the parties hereto
agree to waive the condition to Closing of the approval of this Agreement by the
stockholders  of Abraxas and to withdraw the S-4  Registration  Statement and to
waive compliance by Abraxas with Section 2.02 hereof. If Abraxas  consummates an
offering of a sufficient  number of shares of Abraxas  Common Stock prior to the
Closing  and  prior  to  mailing  of  the  Proxy   Statement-Prospectus  to  the
stockholders of Abraxas that would permit Abraxas to consummate the transactions
in this Agreement  without approval of the stockholders of Abraxas in compliance
with the rules of the Nasdaq  National  Market  (without  reliance  on the 19.9%
Alternative),  the parties  hereto  agree,  at the request of either  Abraxas or
Vessels,  to waive the condition to Closing of the approval of this Agreement by
the stockholders of Abraxas and to withdraw the S-4  Registration  Statement and
to waive  compliance by Abraxas with Section 2.02 hereof.  In the event that (i)
Abraxas  consummates  an  offering of a  sufficient  number of shares of Abraxas
Common  Stock  prior  to  the  Closing  and  after  the  mailing  of  the  Proxy
Statement-Prospectus to the stockholders of Abraxas that would permit Abraxas to
consummate  the   transactions  in  this  Agreement   without  approval  of  the
stockholders  of Abraxas  in  compliance  with the rules of the Nasdaq  National
Market (without  reliance on the 19.9%  Alternative)  or (ii) Vessels  otherwise
confirms  with an opinion of counsel  reasonably  satisfactory  to Abraxas  that
stockholders'  approval  is not  required to  consummate  the  transaction,  the
parties  hereto  agree,  at the request of Vessels,  to waive the  condition  to
Closing of the approval of this Agreement by the  stockholders of Abraxas and to
withdraw the S-4 Registration  Statement and to waive compliance by Abraxas with
Section 2.02 hereof.


                                   ARTICLE III

                         REPRESENTATIONS AND WARRANTIES
                                 OF THE COMPANY

         The Company represents, warrants and agrees as follows:

         Section 3.01 Existence and Good Standing.  The Company is a corporation
duly  organized,  validly  existing and in good  standing  under the laws of the
State of Delaware. The Company has the corporate power to own its properties and
to carry on its business as now being  conducted.  The Company is duly qualified
to do  business  and is in good  standing  in each  jurisdiction  in  which  its
ownership or leasing of properties or the conduct of its business  requires such
qualification,  except for jurisdictions in which the failure to be so qualified

                                       13
                                    ANNEX I
<PAGE>

or to be in good standing would not,  individually  or in the aggregate,  have a
Material Adverse Effect.

         Section   3.02   Capital   Stock.   The  Company   has  an   authorized
capitalization  consisting of 500,000 shares of common stock, par value $.10 per
share,  of which  34,136.24  shares are issued and outstanding and no shares are
held in the Company's  treasury and 50,000 shares of preferred  stock, par value
$.10 per share, of which none are outstanding.  All such outstanding shares have
been duly  authorized and validly  issued and are fully paid and  nonassessable.
Except  as set  forth  in  Schedule  3.02,  there  are no  outstanding  options,
warrants,  rights,  calls,  commitments,  conversion rights, rights of exchange,
plans or other agreements of any character providing for the purchase,  issuance
or  sale  of any  shares  of the  Stock,  other  than  as  contemplated  by this
Agreement.  Each of the  stockholders of Vessels listed on Schedule 3.02 (each a
"Vessels  Stockholder"  and  collectively,  the "Vessels  Stockholders")  is the
beneficial  and record  holder of the number of Shares  set forth  opposite  his
name,  free and  clear,  to the best of the  Company's  knowledge  after due and
diligent  inquiry,  of all  liens,  claims,  encumbrances,  security  interests,
pledges or other adverse claims of any kind or character. Except as set forth on
Schedule  3.02,  none  of the  Vessels  Stockholders  is a party  to any  voting
agreement,  voting  trust or similar  agreement or  arrangement  relating to the
Shares.

         Section  3.03  Corporate  Authority.  The  Company  has  the  requisite
corporate  power  and  authority  to enter  into  this  Agreement  and the other
agreements  contemplated  by this Agreement (the "Related  Agreements") to which
the Company is a party.  The  execution  and delivery of this  Agreement and the
Related  Agreements to which the Company is a party and the  consummation of the
transactions  contemplated  hereby  and  thereby  have  been  duly  and  validly
authorized by the Board of Directors of the Company and, except for the approval
of the Vessels  Stockholders,  no other corporate proceedings on the part of the
Company are necessary to authorize this  Agreement,  the Related  Agreements and
the  transactions  contemplated  hereby and thereby.  This  Agreement is and the
Related  Agreements  to which the  Company is a party will be,  duly and validly
executed  and  delivered by the Company  and,  assuming  the due  authorization,
execution  and  delivery  hereof  and  thereof by the other  parties  hereto and
thereto,  this Agreement  constitutes,  and the Related  Agreements to which the
Company is a party will constitute,  valid and binding agreements of the Company
enforceable  against  the Company in  accordance  with their  respective  terms,
subject to  approval  of the Vessels  Stockholders,  and  subject to  applicable
bankruptcy, insolvency, reorganization, fraudulent transfer, moratorium or other
similar laws affecting the rights of creditors  generally  (the  "Enforceability
Exception").

         Section 3.04  Subsidiaries and  Investments.  Schedule 3.04 hereto sets
forth a list of each  subsidiary  of the Company and its state of  incorporation
(the "Subsidiaries").  Each of the Subsidiaries is a corporation duly organized,
validly  existing  and in good  standing  under  the  laws of the  state  of its
incorporation  and has the corporate  power and authority to own its  properties
and to carry on its business as now being conducted. Each of the Subsidiaries is
duly  qualified to do business and is in good standing in each  jurisdiction  in

                                       14
                                    ANNEX I
<PAGE>

which its  ownership  or leasing of  properties  or the conduct of its  business
requires such  qualification,  except where the failure to be so qualified or in
good  standing  would not,  individually  or in the  aggregate,  have a Material
Adverse Effect.  Except as set forth on Schedule 3.04, the Company does not own,
directly  or  indirectly,  any capital  stock or other  equity or  ownership  or
proprietary interest in any other corporation,  partnership, association, trust,
joint venture or other entity.

         Section 3.05 Financial  Statements and No Material Changes. The Company
has heretofore furnished Abraxas with the audited consolidated balance sheets of
the Company at December  31,  1994,  December 31, 1995 and December 31, 1996 and
the related  consolidated  statements of income,  stockholders'  equity and cash
flow for the years then ended,  all certified by Price  Waterhouse LLP or Arthur
Andersen & Company whose unqualified  reports thereon are included therewith and
the unaudited  consolidated  balance sheet of the Company at August 31, 1997 and
the related unaudited  consolidated  statements of income,  stockholders' equity
and  cash  flow  for  the  eight-month  period  then  ended  (cumulatively,  the
"Financial  Statements").  The  consolidated  balance sheet of the Company as at
December 31, 1996 is hereinafter  referred to as the "Balance Sheet".  Except as
set forth on Schedule  3.05, the Financial  Statements,  including the footnotes
thereto,  have been prepared in accordance  with generally  accepted  accounting
principles  consistently  applied throughout the periods indicated.  The balance
sheets  included  in the  Financial  Statements  fairly  present  the  financial
condition of the Company and the  Subsidiaries  at the respective  dates thereof
and, except as indicated  therein,  reflect all claims against and all debts and
liabilities of the Company and the Subsidiaries,  fixed or contingent, as at the
respective dates thereof,  and the related  statements of income,  stockholders'
equity and cash flow fairly present the results of the operations of the Company
and the Subsidiaries and the changes in their financial position for the periods
indicated.  Except as set forth on Schedule 3.05 and except for the transactions
contemplated  by the NARCO  Agreements,  since  December 31, 1996 (the  "Balance
Sheet Date"),  there has been (a) no change in the assets or liabilities,  or in
the  business  or  condition,  financial  or  otherwise,  or in the  results  of
operations, of the Company and the Subsidiaries which has had a Material Adverse
Effect,  other than  changes in the oil and gas  industry  generally  and in the
ordinary course of business  consistent with past practice,  and, other than the
transactions contemplated by this Agreement, to the Company's knowledge, no fact
or condition  exists or is contemplated  or threatened  which might cause such a
change in the future. For purposes of this Agreement,  a transaction or a series
of related  transactions  involving  a sum of money less than  $80,000  shall be
deemed to have occurred in the ordinary course of business.

         Section 3.06 Books and Records. The minute books of the Company and the
Subsidiaries,  as previously made available to Abraxas and its  representatives,
contain accurate and complete summaries of all meetings of and corporate actions
or written  consents by the  stockholders  and Board of Directors of the Company
and the Subsidiaries.  Except as set forth in Schedule 3.06, the Company and the
Subsidiaries  do not have  any of  their  records,  systems,  controls,  data or
information recorded, stored, maintained, operated or otherwise wholly or partly
dependent  upon or held by any means  (including any  electronic,  mechanical or

                                       15
                                    ANNEX I
<PAGE>

photographic  process,  whether  computerized  or not and all  means  of  access
thereto and  therefrom)  which are not under the exclusive  ownership and direct
control of the Company and the Subsidiaries.

         Section 3.07 Title to Other Properties; Encumbrances. Except (i) as set
forth in Schedule 3.07, (ii) for the real property  included in the Interests or
(iii) as reflected in the Financial  Statements,  and except for  properties and
assets which have been sold or otherwise  disposed of in the ordinary  course of
business or pursuant to the NARCO  Agreements  since the Balance Sheet Date, the
Company and the  Subsidiaries  have good,  valid and  marketable  title free and
clear of all liens, pledges, encumbrances and adverse claims created by, through
or under the Company and the Subsidiaries but not otherwise other than Permitted
Encumbrances,  to (a) all of their  material  properties  and  assets  (real and
personal,  tangible and  intangible),  including,  without  limitation,  all the
properties and assets reflected in the Balance Sheet, except as indicated in the
notes thereto,  and (b) all the  properties and assets  purchased by the Company
and the Subsidiaries since the Balance Sheet Date.

         Section 3.08 Real Property. The Company and the Subsidiaries do not own
or lease any  interests in real property  other than the Leases (as  hereinafter
defined) set forth in Schedule  3.10 and the real  property and leases set forth
in Schedule 3.08.

         Section 3.09 Oil and Gas Reserve Report. The Company has made available
to the Purchaser the Reserve Report dated as of August 31, 1997 prepared by NSA.
The Company has provided no materially  false or misleading  information  to and
has not  withheld  any  material  information  from  NSA,  with  respect  to the
preparation  of the  Reserve  Report.  The  Company is not aware of any facts or
circumstances  that should  reasonably cause the Company to conclude that any of
the information that was supplied by the Company to NSA in connection with their
preparation  of the  Reserve  Report is not  currently  correct in all  material
respects  except for the  production of oil, gas and other  hydrocarbons  in the
ordinary course of business, the acquisition and disposition of interests in oil
and gas  properties  described  on Schedule  3.10 and  decreases  in oil and gas
prices generally in the United States.

         Section 3.10 Title to Interests.  (a) Schedule 3.10 identifies (i) each
oil well and gas well in which the Company and the  Subsidiaries own an interest
described in the Reserve Report  (exclusive of proved  undeveloped  properties),
vested  or   contingent,   and  which  is  producing  or  capable  of  producing
hydrocarbons in commercial  quantities  (individually a "Well" and  collectively
the "Wells"),  (ii) the Company's and the Subsidiaries' net revenue interest and
leasehold cost bearing  interest (i.e.,  working  interest) in each Well,  (iii)
each oil, gas, and mineral lease in which the Company and the  Subsidiaries  own
any interest and the type of interest owned by the Company and the  Subsidiaries
(individually  and  collectively,  the  "Leases"),  (iv) all  lands in which the
Company  and the  Subsidiaries  own a fee  simple  or term  mineral  or  royalty
interest which is not entitled to share in the production of  hydrocarbons  from
the Wells or the proceeds of sale of the  production  of  hydrocarbons  from the
Wells (the "Non-Producing Mineral Fee Interests"), and (v) the Company's and the

                                       16
                                    ANNEX I
<PAGE>

Subsidiaries'  interest in and to the  Non-Producing  Mineral Fee  Interests  by
virtue of such ownership. The lands described in Schedules 3.10 are individually
and  collectively  called the  "Land."  The  Wells,  the  Leases,  and the Land,
together  with  all of the  Company's  right,  title  and  interest  in (i)  all
contracts, agreements, leases, licenses, permits, authorizations, easements, and
orders  (individually and collectively  called the "Vessels  Agreements") in any
way relating to the Wells, the Leases and/or the Land, the operations  conducted
or to be conducted  pursuant thereto or thereon,  or the production,  treatment,
sale or disposal of  hydrocarbons  or water produced  therefrom or  attributable
thereto,  (ii) all personal property,  fixtures (including,  without limitation,
pipe,  plants  and  pipelines),   equipment   (including,   without  limitation,
compressors,  parts, rods, tubular goods and supplies) and improvements  located
at, under or on the Wells,  the Leases  and/or the Land,  or used or obtained in
connection  therewith or with the operation or maintenance of the Wells or other
facilities  thereon  or with the  production,  treatment,  sale or  disposal  of
hydrocarbons or water produced therefrom or attributable  thereto, and (iii) all
other  rights  and  interests  in, to or under or derived  from the  Wells,  the
Leases, the Vessels Agreements, and/or the Land (including,  without limitation,
all mineral and royalty interests,  and all overriding royalty interests and all
other interests in or payable out of or measured by production,  and all surface
interests,  for a term or in fee), or in any way relating thereto,  are referred
to herein as the "Interests."

         (b) With  respect to each Well,  the  Company's  and the  Subsidiaries'
interests  in the  Leases  and the Land are such that,  after  giving  effect to
existing spacing orders, operating agreements, unit agreements,  communitization
agreements and orders,  unitization orders and pooling  designations and orders,
subject  to  the   limitations   described  in  Schedule   3.10  and   Permitted
Encumbrances,  and after taking into account all royalty  interests,  overriding
royalty interests, net profits interests,  production payments and other burdens
on  production   attributable  to  third  parties,   (i)  the  Company  and  the
Subsidiaries  are entitled,  during the respective  terms of the Leases covering
such  Well,  to a share  (expressed  as a  decimal)  of all oil,  gas and  other
minerals  produced  from  such  Well  which  is not less  than the "net  revenue
interest" set forth in connection  with the  description of such Well,  free and
clear  of  all  liens,  claims,  mortgages,   deeds  of  trust,  assignments  of
production,  and security interests, other than those described in Schedule 3.07
and those that would not render title less than Defensible, (ii) the Company and
the Subsidiaries own an undivided interest (expressed as a decimal) equal to the
"working  interest" set forth in connection with the description of such Well in
and to all property and rights incident thereto, including all rights in, to and
under all agreements, leases, permits, easements, licenses and orders in any way
relating  thereto,  and in and to all wells,  personal  property,  fixtures  and
improvements  thereon,  appurtenant  thereto or used or obtained  in  connection
therewith  or  with  the   production  or  treatment  or  sale  or  disposal  of
hydrocarbons or water produced therefrom or attributable  thereto, and (iii) the
Company and the Subsidiaries are obligated,  during the entire extended terms of
the Leases to which  production from such Well is  attributable,  for a share of
the costs relating to the exploration,  development,  and operation of such Well
which is no greater than the "working interest" set forth in connection with the
description of such Well.

                                       17
                                    ANNEX I
<PAGE>

         Section 3.11  Compliance  with Leases and Laws.  Except as set forth in
Schedule 3.11:

         (a) Each Lease is in full force and effect and all rentals,  royalties,
shut-in well payments,  bonuses and other payments due or payable from or by the
Company and the  Subsidiaries  under the NARCO Leases (as  hereinafter  defined)
prior  to  April  8,  1997  and  the  Leases  and  applicable  laws,  rules  and
regulations, have been properly and timely paid, except where the failure to pay
properly and timely would not have a Material Adverse Effect, and all conditions
necessary  to keep the Leases in full force and effect as of the date hereof and
as of the Effective  Time have been or shall be fully  performed,  including all
payments or obligations due from or by third parties except where the failure to
satisfy such conditions  would not have a Material Adverse Effect and subject to
the Enforceability Exception;

         (b) The Company and the  Subsidiaries  are entitled to receive (and are
currently  receiving with respect to producing  oil, gas and/or mineral  leases)
without present  suspense or presently  required  indemnity  against asserted or
known  defects  or  disputes  regarding  the  Company's  and  the  Subsidiaries'
ownership,  from each pipeline  purchaser or other  purchaser of production,  or
from the  person  receiving  payments  from any such  purchasers,  the  proceeds
attributable to the net revenue  interest in production from each of the Leases,
as set forth in Schedule  3.10 except where the failure to receive such proceeds
would not have a Material Adverse Effect;

         (c) All Wells  operated by the Company and the  Subsidiaries  have been
drilled,  completed and bottomed within the boundaries of each of the respective
Leases or within the limits  otherwise  permitted by contract and by law, and no
such well is subject to material penalties or restrictions on allowables because
of any overproduction (legal or illegal) which would prevent the assignment of a
full  allowable  to each  such well by the  state or local  governmental  agency
having  jurisdiction.  No Well  is  subject  to any  "take  or  pay" or  similar
obligation  by which a purchaser of  production  has made payment to the Company
and the Subsidiaries for oil, gas or mineral production yet to be delivered,  or
by which any party is  entitled  to take or receive  production  from the Leases
without thereafter paying full value therefor;

         (d) The Company and the Subsidiaries  have complied with all Applicable
Laws (as defined below) relating to the production of or from the Interests, the
conduct of drilling and production  operations with respect to the Interests and
the  regulation  thereof,  except  where the failure to comply  would not have a
Material Adverse Effect;

         (e) The  Company  and the  Subsidiaries  have not  received  notice  of
violation or probable violation of any Applicable Law relating to or directly or
indirectly  affecting  the  Interests  or the NARCO  Interests  (as  hereinafter
defined),  nor are  there  any such  violations,  other  than  such  notices  or
violations which would not have a Material Adverse Effect;

                                       18
                                    ANNEX I
<PAGE>

         (f) There have been no demands for  cancellation  or termination of any
of the Interests or for any claimed breach of any Interest due to the failure of
the Company,  the Subsidiaries or any third party to produce or conduct drilling
or  other  operations  thereon,  nor have  there  been  any  suits,  enforcement
proceedings or other actions filed, threatened or anticipated by the Company and
the Subsidiaries which might have a Material Adverse Effect;

         (g) The Company and the  Subsidiaries  hold all  licenses,  franchises,
permits,  easements,  certificates,  consents, rights and privileges ("Permits")
necessary to the  operation of the  Interests,  and to the best of the Company's
knowledge,  each third party operator of any of the Interests  holds all Permits
necessary to the operation of the Interests  except for such Permits the lack of
which would not have a Material Adverse Effect;

         (h) Except for current  invoices not yet due the  individual  amount of
which is less than $80,000, all invoices,  statements, bills and accounts of and
to the Company and the Subsidiaries for labor,  services,  materials or supplies
furnished to or for the Interests have been paid in full in the ordinary  course
of business  consistent with past practices and the Company and the Subsidiaries
are current in payment of all joint  interest  billings for  operations or other
contracts pertaining to the operation of the Interests;

         (i) All production from the NARCO Wells (as hereinafter  defined) prior
to April  8,  1997 and the  Wells  operated  by the  Company  has been  properly
accounted for and all proceeds  attributable  thereto have been properly paid in
the ordinary course of business consistent with past practices;

         (j) No production or sale of oil, gas and other hydrocarbons heretofore
produced or sold from or  attributable  to the NARCO Interests prior to April 8,
1997 or the Interests  has been in excess of any allowable  quantity or price or
in violation of any other rule or regulation  affecting the sale of hydrocarbons
as established by the applicable regulatory authorities except where such excess
or violation would not have a Material Adverse Effect; and

         (k) No gas produced is subject to the price control jurisdiction of the
Federal Energy Regulatory Commission ("FERC") under the Natural Gas Policy Act.

For purposes of this Agreement,  (i) the term "NARCO Interests",  shall mean the
interests  described  in  Section  2.1(a)  through  (f)  of the  NARCO  Upstream
Agreement,  (ii) the term  "NARCO  Leases"  shall  mean the oil,  gas and  other
mineral  leasehold  interests  or mineral  interests  described  in Exhibit  A-2
attached to the NARCO Upstream  Agreement and (iii) the term "NARCO Wells" shall
mean the oil and gas  wells  described  in  Exhibit  A-1  attached  to the NARCO
Upstream Agreement.  The "NARCO Properties" shall mean the NARCO Interests,  the
NARCO  Leases and the NARCO  Wells.  The Company has provided to Abraxas a true,
correct and complete copy of the NARCO Agreements and all exhibits and schedules
thereto.

                                       19
                                    ANNENX I
<PAGE>

         Section 3.12 Sale of Production.  Except as set forth in Schedule 3.12,
the  Company  and the  Subsidiaries  have no  production  from any Well which is
subject to balancing  rights of third parties or is subject to balancing  duties
under governmental requirements, and no third party has production from any Well
which is subject to the balancing  rights of the Company or the Subsidiaries and
except as would not have a  Material  Adverse  Effect.  Except as  disclosed  on
Schedule 3.12, the Company and the Subsidiaries  have not collected any proceeds
from the sale of hydrocarbons produced from the NARCO Interests or the Interests
which are subject to refund. Except as set forth in Schedule 3.12, proceeds from
the sale of oil, gas and natural gas liquids  from the Wells are being  received
by the Company and the Subsidiaries in a materially timely manner and based upon
the net revenue  interest  described at Schedule  3.10 for each such Well and in
accordance with the terms of the applicable  purchase  agreement  governing such
sale,  and are not being held in suspense for any reason  except in the ordinary
course  of  business  consistent  with  past  practices.  The  Company  and  the
Subsidiaries  have  described in Schedule 3.12 and made available to Abraxas for
examination all contracts and agreements (other than routine division orders and
contracts and  agreements  terminable by the Company and the  Subsidiaries  upon
less than sixty (60) days' notice) pursuant to which hydrocarbons  produced from
the  Interests  are sold,  transported,  processed or  otherwise  disposed of or
marketed.  Except as  disclosed in Schedule  3.12,  no person has any call upon,
right of first  refusal,  preferential  right or option to  purchase  or similar
rights with respect to the Interests or to the  production  therefrom  except at
prevailing   market  prices.   Except  as  disclosed  in  Schedule  3.12,  price
renegotiation  procedures have not been commenced under FERC Order No. 451 which
involve  or which  hereafter  may affect any gas  produced  from the  Interests.
Except as disclosed in Schedule  3.12,  no offer of credits under FERC Order No.
500 has been made which would  entitle any  purchaser of gas  produced  from the
Interests to credit  transported  volumes against such  purchaser's  take-or-pay
obligations under any contract for the sale of gas produced from the Interests.

         Section 3.13 Status of Wells. Except as disclosed on Schedule 3.13, all
Wells set forth in the Reserve Report,  excluding proved undeveloped properties,
are producing or  operationally  capable of producing  hydrocarbons  (based upon
prevailing  economic  conditions)  without  the  necessity  of  recompletion  or
material reworking operations. Except as disclosed in Schedule 3.13, the Company
and  the  Subsidiaries  have  no  obligations   existing  for  the  plugging  or
abandonment  (including  obligations  for restoration of the surface) of any oil
and/or gas well, salt water disposal well or other well located at the Interests
or the NARCO  Interests  other than the general  obligation  to plug and abandon
wells.

         Section 3.14 Tax Partnerships.  No item of the Interests is treated for
income tax  purposes  by the Company  and the  Subsidiaries  as being owned by a
partnership.

         Section 3.15 Equipment.  To the best of the Company's  knowledge,  that
portion of the  Interests  consisting  of  personal  property,  facilities,  and
fixtures  including,  without  limitation,  all  equipment  and  assets  used in
connection with the operation of the Interests, is in good condition and repair,

                                       20
                                    ANNEX I
<PAGE>

ordinary wear and tear excepted, and is adequate for the proper operation of the
Interests,  except  for such  repairs  and  additions  necessary  for the proper
operation of the Interests and which  individually or in the aggregate would not
result in a Material Adverse Effect.

         Section 3.16 Material Contracts.  Schedule 3.16 heretofore sets forth a
complete list of all of the following  agreements,  documents and instruments to
which  either  the  Company  or any of the  Subsidiaries  is a party or by which
either the  Company or any of the  Subsidiaries  is bound that is of a type that
would be  required  to be  included  as an  exhibit  to a Form S-1  registration
statement  pursuant  to the  rules and  regulations  of the  Commission  if such
registration  statement  were  filed  by  the  Company  (the  "Vessels  Material
Contracts"):  (a) all  agreements,  contracts  and  commitments  relating to the
employment  of any  person by the  Company  or any of the  Subsidiaries  and all
bonus, deferred compensation,  pension,  profit sharing, stock option,  employee
stock purchase, retirement and other employee benefit plans; (b) all agreements,
indentures  and other  instruments  which contain  restrictions  with respect to
payment of dividends or any other  distribution in respect of its capital stock;
(c) all agreements,  contracts and commitments relating to capital expenditures;
(d) all  agreements,  contracts,  instruments  and  commitments  relating to the
borrowing  of money by the  Company or any of the  Subsidiaries;  (e) all loans,
advances to, and investments in, any other Person (as hereinafter defined),  and
all  agreements,  contracts  or  commitments  relating to the making of any such
loan, advance or investment; (f) all guarantees and other contingent liabilities
with respect to any  indebtedness  or obligation of any other Person (other than
the endorsement of negotiable  instruments for collection in the ordinary course
of business); (g) all management services, consulting and any other similar type
contracts;  (h) all leases of personal property;  (i) all agreements,  contracts
and commitments  limiting the freedom of the Company or any of the  Subsidiaries
to engage in any line of business or to compete with any other  Person;  (j) all
agreements, contracts and commitments not entered into in the ordinary course of
business  which involve  $50,000 or more in the aggregate;  (k) all  agreements,
contracts and commitments  entered into in the ordinary course of business which
involve $100,000 or more in the aggregate; and (l) all agreements, contracts and
commitments,  the breach or termination of which might reasonably be expected to
have a Material  Adverse  Effect.  Each  contract,  agreement and instrument set
forth in Schedule  3.16 is in full force and effect and there  exists no default
or event of  default  or event,  occurrence,  condition  or act  (including  the
purchase of the Stock hereunder) by the Company or the Subsidiaries  and, to the
knowledge of the Company,  any party to such  contract,  agreement or instrument
other than the Company or the Subsidiaries which, with the giving of notice, the
lapse of time or the happening of any other event or  condition,  would become a
default or event of default thereunder, except for such defaults or events as to
which  requisite  waivers or  consents  have been  obtained  or which  would not
reasonably be expected to have a Material  Adverse  Effect.  Neither the Company
nor any of the  Subsidiaries  has violated any of the terms or conditions of any
contract or agreement set forth in Schedule 3.16 in any material respect, except
for  such  violations  as to which  requisite  waivers  or  consents  have  been
obtained,  and, to the  knowledge  of the  Company,  all of the  covenants to be

                                       21
                                    ANNEX I
<PAGE>

performed by any other party thereto have been fully  performed.  Contracts made
in the ordinary  course of business  involving  less than $100,000  shall not be
deemed  material  for  purposes  of this  Section  3.16.  Except as set forth on
Schedule 3.16, all of the contracts,  agreements,  leases and other  instruments
set forth on Schedule  3.16 are freely  assignable  and have not been amended or
materially modified.

         Section  3.17  Restrictive  Documents.  Except as set forth in Schedule
3.17,  the Company and the  Subsidiaries  are not subject to, or a party to, any
charter, by-law, mortgage,  lien, lease, license, permit,  agreement,  contract,
instrument, law, rule, ordinance,  regulation, order, judgment or decree, or any
other restriction of any kind or character,  which would prevent consummation of
the transactions contemplated by this Agreement,  compliance by the Company with
the terms, conditions and provisions hereof or, to the Company's knowledge,  the
continued operation of the Company's and the Subsidiaries'  businesses after the
date  hereof on  substantially  the same basis as  heretofore  operated or which
would  restrict  the ability of the Company or the  Subsidiaries  to acquire any
property  or conduct  business  in any area  except as would not have a Material
Adverse  Effect.  Other than in connection or compliance  with the provisions of
the Delaware Statute,  the Securities Act, the securities,  takeover or blue sky
laws of the various  states and other than as set forth on Schedule 3.17 hereto,
no authorization,  consent or approval of, or filing with, any governmental body
or authority,  and no authorization,  consent or approval of any third party, is
necessary for the consummation by the Company of the  transactions  contemplated
by this Agreement and the Related Agreements.

         Section 3.18 Litigation. Except as set forth in Schedule 3.18, there is
no action, suit,  proceeding at law or in equity by any person or entity, or any
arbitration  or any  administrative  or other  proceeding  by or before  (or any
investigation by) any governmental or other instrumentality or agency,  pending,
or, to the best knowledge of the Company,  threatened,  against or affecting the
Company or any of the  Subsidiaries  or their  respective  properties  or rights
which could  reasonably be expected to have a Material Adverse Effect and to the
best of the Company's knowledge, there is not a valid basis for any such action,
proceeding or investigation. The Company and the Subsidiaries are not subject to
any judgment,  order or decree entered in any lawsuit or proceeding  which could
reasonably be expected to have a Material Adverse Effect.

         Section  3.19 Taxes.  The Company  and the  Subsidiaries  have filed or
caused to be filed,  within the times and in the manner  prescribed  by law, all
federal, state, local, tribal, severance, ad valorem and foreign tax returns and
tax reports  which are  required to be filed by, or with respect to, the Company
and the Subsidiaries.  Such returns and reports reflect accurately all liability
for taxes of the Company and the  Subsidiaries  for the periods covered thereby.
All federal,  state, local,  tribal,  severance,  ad valorem and foreign income,
profits,   franchise,   sales,  use,  occupancy,  excise  and  other  taxes  and
assessments  (including  interest and  penalties)  payable by, or due from,  the
Company and the Subsidiaries prior to Closing have been fully paid or adequately
disclosed  and  fully  provided  for in the  books  and  records  and  financial
statements of the Company  except as provided in clause (v) of the definition of
Permitted  Encumbrances.  The Company has no knowledge of any examination of any

                                       22
                                    ANNEX I
<PAGE>

tax return of the Company and the  Subsidiaries  that is  currently in progress.
There are no outstanding agreements or waivers extending the statutory period of
limitation applicable to any tax return of the Company and the Subsidiaries.

         Section 3.20 Insurance. Schedule 3.20 hereto sets forth a complete list
of  insurance  policies  which the Company and the  Subsidiaries  maintain  with
respect to their  respective  businesses,  properties  or employees  (other than
insurance  owned or held by operators for those  properties  where a party other
than the Company or one of its Subsidiaries is the operator).  Such policies are
in full force and effect and include all policies  required in  connection  with
the operation of the business of the Company and the  Subsidiaries  as currently
conducted by Applicable Law, the Environmental Laws (as hereinafter defined) and
all contracts and agreements related to the Company and the Subsidiaries.  Since
December  31,  1996,  there  has not been any  material  adverse  change  in the
Company's  and the  Subsidiaries  relationship  with  their  insurers  or in the
premiums payable pursuant to such policies.

         Section  3.21  Intellectual  Properties.  Other than rights the Company
claims in the corporate  names set forth on Schedule  3.21,  the Company and the
Subsidiaries  do not have any  patents,  patent  rights,  licenses,  trademarks,
trademark rights,  trade names, trade name rights,  service marks,  service mark
rights,  copyrights or similar rights, nor require any such rights in connection
with the conduct of their business. To the knowledge of the Company, the Company
and the Subsidiaries  are not infringing,  or otherwise acting adversely to, the
right of any Person  under or in respect  to, any  patent,  license,  trademark,
trade name, service mark, copyright or similar intangible right.

         Section 3.22  Compliance  With Laws.  The Company and the  Subsidiaries
have complied with all applicable Federal,  state, local and tribal laws, rules,
regulations,  statutes,  ordinances and orders  ("Applicable  Laws")  including,
without  limitation,   Applicable  Laws  relating  to  securities,   properties,
manufacturing  processes,  sales  practices,  employment  practices,  terms  and
conditions of employment,  wages and hours, safety, occupational safety, health,
product  safety and civil  rights,  the  non-compliance  with which would have a
Material  Adverse  Effect.  The Company has no knowledge  of any facts,  claims,
investigations  or similar matters which constitute a default or violation under
any Applicable Laws which would have a Material Adverse Effect.  For purposes of
this Agreement,  the term Applicable Laws shall not include  Environmental Laws.
Neither the Company nor any of the  Subsidiaries is charged or, to the knowledge
of the  Company,  threatened  with or under  investigation  with  respect to any
violation of any Applicable Laws.

         Section 3.23 Accounts Receivable.  The Company has heretofore delivered
to Abraxas a list of its  accounts  receivable,  showing  the amounts due and an
aging analysis thereof.  Except as set forth on Schedule 3.23, the amount of all
accounts  receivable,  unbilled  invoices and other debts due or recorded in the
respective  records and books of account of the Company and the  Subsidiaries as

                                       23
                                    ANNEX I
<PAGE>

being due to the  Company and the  Subsidiaries  as at August 31, 1997 (less the
amount of any  provision  or reserve  therefor  made in the  Balance  Sheet) are
expected to be good and  collectible in full in the ordinary  course of business
and in any event not later than 60 days after the Closing Date; and none of such
accounts  receivable  or other debts is subject to any  counterclaim  or set-off
except to the extent of any such provision or reserve.

         Section 3.24 Employment  Relations.  Since January 1, 1992, the Company
and the  Subsidiaries  have  not (i)  been a party  to a  collective  bargaining
agreement,  (ii) had any organization  certified as a bargaining agent on behalf
of all or any portion of the  Company's or the  Subsidiaries'  employees,  (iii)
received a demand for recognition from any union or other organization,  (iv) to
the  knowledge  of the Company  and the  Subsidiaries,  had any attempt  made to
organize any of the Company's or the  Subsidiaries'  employees,  (v) encountered
any  labor  union  organizing  activity,  or  (vi)  encountered  any  actual  or
threatened   employee   strikes,   work  stoppages,   jurisdictional   disputes,
slow-downs,  or  lock-outs.  Schedule  3.24  hereto  sets  forth  a list  of all
agreements and understandings,  whether written or oral, between the Company and
the  Subsidiaries  and  any of  their  officers  or  employees  that  contain  a
non-competition and confidentiality agreement and/or covenant or any other terms
of employment.  Except as set forth on Schedule 3.24 hereto, the Company and the
Subsidiaries do not have any pending grievances,  unfair labor practice charges,
Equal Employment  Opportunity Commission charges, state or local fair employment
practice charges,  Department of Labor  investigations,  wage and hour claims or
disputes,  or any other labor law related charges or investigations  relating to
the Company.

         Section 3.25      Employee Benefit Programs.

         (a) Schedule  3.25 hereto sets forth a list of every  Employee  Program
(as hereinafter  defined) maintained (as hereinafter  defined) by the Company or
any Affiliate at any time during the five-year period ending on the date hereof.

         (b) Except as set forth in Schedule 3.25 hereto,  each Employee Program
which has been  maintained  by the Company or any Affiliate and which has at any
time been intended to qualify under Section  401(a) or 501(c)(9) of the Internal
Revenue  Code of 1986,  as  amended  (the  "Code"),  has  received  a  favorable
determination  or approval  letter from the  Internal  Revenue  Service  ("IRS")
regarding its qualification  under such section and has, in fact, been qualified
under  the  applicable  section  of the  Code  from the  effective  date of such
Employee  Program  through and including  the Closing (or, if earlier,  the date
that  all of such  Employee  Program's  assets  were  distributed).  No event or
omission has occurred  which would cause any such  Employee  Program to lose its
qualification under the applicable Code section.

         (c) Except as set forth in Schedule 3.25 hereto, there has not been any
failure in any  material  respect by the Company or an  Affiliate to comply with
any laws  applicable  with  respect  to the  Employee  Programs  that  have been
maintained by the Company or any Affiliate.  Each Employee Program maintained by
the Company or any Affiliate has complied in all material respects, both in form

                                       24
                                    ANNEX I
<PAGE>

and operation,  with the provisions and requirements of the Code, ERISA, and all
other  applicable  law.  With respect to any Employee  Program now or heretofore
maintained by the Company or any  Affiliate,  there has occurred no  "prohibited
transaction,"  as defined  in  Section  406 of the  Employee  Retirement  Income
Security Act of 1974,  as amended  ("ERISA"),  or Section  4975 of the Code,  or
breach of any duty  under  ERISA or other  applicable  law  (including,  without
limitation,  any  health  care  continuation  requirements  or any other tax law
requirements,  or  conditions  to favorable  tax  treatment,  applicable to such
plan), which could result,  directly or indirectly (including without limitation
through  any  obligation  of  indemnification  or  contribution),  in any taxes,
penalties  or other  liability  to the Company or any  Affiliate.  Except as set
forth in Schedule 3.25 hereto, no litigation,  claim, arbitration,  governmental
administrative proceeding or investigation or other proceeding (other than those
relating to routine  claims for benefits) is pending or threatened  with respect
to any Employee Program maintained by the Company or an Affiliate.

         (d) Neither the Company nor any  Affiliate  has incurred any  liability
under Title IV of ERISA which will not be paid in full prior to Closing.  Except
as set forth in Schedule  3.25 hereto,  there has been no  "accumulated  funding
deficiency"  (whether or not waived) with  respect to any Employee  Program ever
maintained  by the Company or any  Affiliate  and subject to Code Section 412 or
ERISA  Section  302.  With  respect to any Employee  Program  maintained  by the
Company or any  Affiliate  and  subject to Title IV of ERISA,  there has been no
(nor  will  there be any as a result  of the  transaction  contemplated  by this
Agreement) (i) "reportable  event," within the meaning of ERISA Section 4043, or
the regulations thereunder (for which the notice requirement is not waived under
29 C.F.R.  Part 2615) and (ii) event or condition which presents a material risk
of plan  termination  or any  other  event  that may cause  the  Company  or any
Affiliate to incur liability or have a lien imposed on its assets under Title IV
of ERISA.  Except as set forth in Schedule  3.25  hereto,  all  payments  and/or
contributions required to have been made (under the provisions of any agreements
or other  governing  documents or  applicable  law) with respect to all Employee
Programs ever maintained by the Company or any Affiliate,  for all periods prior
to Closing,  either have been made or have been accrued (and all such unpaid but
accrued  amounts are described on Schedule 3.25 hereto).  Except as described in
Schedule  3.25  hereto,  no Employee  Program  maintained  by the Company or any
Affiliate  within the five years  preceding the date hereof and subject to Title
IV of ERISA (other than a  Multiemployer  Plan as  hereinafter  defined) has any
"unfunded benefit  liabilities" within the meaning of ERISA Section 4001(a)(18),
as of the Closing Date. Except as set forth in Schedule 3.25 hereto, none of the
Employee  Programs  maintained by the Company or any  Affiliate  within the five
years  preceding  the date  hereof has ever  provided  health  care or any other
non-pension  benefits to any employees  after their  employment  was  terminated
(other than as required by Part 6 of Subtitle B of Title I of ERISA or any other
health  benefits  law) or has ever  promised  to provide  such  post-termination
benefits.  Except as set forth on Schedule  3.25  hereto,  there are no promised
increases in benefits (whether  expressed,  implied,  oral or written) under any

                                       25

                                    ANNEX I
<PAGE>

Employee Program  maintained by the Company or any Affiliate,  nor are there any
obligations, commitments or understandings to continue any such Employee Program
(whether  expressed,  implied,  oral or written),  except  pursuant to the terms
thereof or as required by Section 4980B of the Code.

         (e) With respect to each Employee Program  maintained by the Company or
any  Affiliate  within the five years  preceding  the date hereof,  complete and
correct  copies of the  following  documents  (if  applicable  to such  Employee
Program) have  previously  been delivered or made available to Abraxas:  (i) all
documents  embodying or governing such Employee Program,  and any funding medium
for the Employee Program (including,  without  limitation,  trust agreements) as
they may have been  amended  through the date  hereof;  (ii) the most recent IRS
determination  or approval  letter with respect to such  Employee  Program under
Code  Section  401 or  501(c)(9),  and any  applications  for  determination  or
approval  subsequently  filed with the IRS;  (iii) the three most recently filed
IRS Forms 5500, with all applicable schedules and accountants' opinions attached
thereto; (iv) the current summary plan description for such Employee Program (or
other  descriptions  of such Employee  Program  provided to  employees)  and any
material  modifications to prior versions thereof;  (v) any insurance or annuity
policy  (including any fiduciary  liability  insurance  policy)  related to such
Employee Program;  (vi) any documents evidencing any loan to an Employee Program
that is a leveraged  employee stock  ownership  plan;  (vii) with respect to any
Multiemployer Plan, any participation or adoption agreement relating to any such
participation  in or  contributions  under  such  plan  by  the  Company  or any
Affiliate;  and (vii) the three most recent summary  annual reports  provided to
participants.

         (f) Except as set forth in Schedule 3.25 hereto,  each Employee Program
maintained  by the Company or any  Affiliate as of the date hereof is subject to
termination  by the Board of Directors of the Company or any  Affiliate,  as the
case may be,  without any further  liability  or  obligation  on the part of the
Company or any Affiliate to make further  contributions  to any trust maintained
under any such Employee Program following such termination.

         (g) For purposes of this Section 3.25:

                  (i) "Employee  Program"  means (A) all employee  benefit plans
within  the  meaning of ERISA  Section  3(3),  including,  but not  limited  to,
multiple  employer  welfare  arrangements  (within the meaning of ERISA  Section
3(40)),  plans to which  more than one  unaffiliated  employer  contributes  and
employee  benefit plans (such as foreign or excess  benefit plans) which are not
subject to ERISA;  and (B) all stock  option  plans,  bonus or  incentive  award
plans,  severance pay policies or agreements,  parachute  payment  arrangements,
deferred  compensation  agreements,  supplemental income arrangements,  vacation
plans,  and all other employee  benefit plans,  agreements and  arrangements not
described in (A) above.  In the case of an Employee  Program  funded  through an
organization  described  in  Code  Section  501(c)(9),  each  reference  to such
Employee Program shall include a reference to such organization;

                                       26
                                    ANNEX I
<PAGE>

                  (ii) an entity  "maintains" an Employee Program if such entity
sponsors,  contributes  to, or provides  (or has  promised to provide)  benefits
under such  Employee  Program,  or has any  obligation  (by  agreement  or under
applicable  law) to  contribute  to or  provide  benefits  under  such  Employee
Program,  or if such Employee Program  provides  benefits to or otherwise covers
employees of such entity (or their spouses, dependents, or beneficiaries);

                  (iii) An entity is an  "Affiliate" of the Company for purposes
of this Section  3.25 if it is  considered  a single  employer  with the Company
under  ERISA  Section  4001(b)  or part of the same  "controlled  group"  as the
Company for purposes of ERISA Section 302(d)(8)(C); and

                  (iv)  "Multiemployer  Plan" means a (pension  or  non-pension)
employee  benefit plan to which more than one employer  contributes and which is
maintained pursuant to one or more collective bargaining agreements.

         (h) The Company  has  complied  with the  Consolidated  Omnibus  Budget
Reconciliation Act of 1984, as amended ("COBRA").

         (i) Except as set forth in Schedule  3.25,  neither the  execution  and
delivery of this Agreement nor the consummation of the transactions contemplated
hereby will (i) result in any payment to be made by the Company or any Affiliate
(including,  without limitation,  severance,  unemployment compensation,  golden
parachute (as defined in Section 280G of the Code),  or otherwise)  becoming due
to any employee, director or consultant, or (ii) increase any benefits otherwise
payable under any Employee Program.

         (j) Schedule  1.04 sets forth a true,  correct and complete list of all
employee severance costs payable by the Company at the Closing.

         Section 3.26 Interests in Clients,  Suppliers, Etc. Except as set forth
in Schedule 3.26,  the Company,  the  Subsidiaries  and, to the knowledge of the
Company and the  Subsidiaries,  their  officers  and  directors  do not possess,
directly or indirectly,  any financial interest in, or is a director, officer or
employee of, any corporation,  firm,  association or business organization which
is a client, supplier, customer, lessor, lessee, or competitor of the Company or
the  Subsidiaries.  Ownership of securities of a company  whose  securities  are
registered  under the  Securities  Exchange  Act of 1934,  as amended (the "1934
Act") not in excess of 5% of any class of such securities shall not be deemed to
be a financial  interest for purposes of this Section 3.26.  Except as described
in the notes to the  Financial  Statements  which have been  certified by Arthur
Andersen  &  Company  or  Price  Waterhouse  LLP,  there  are no  related  party
transactions which would otherwise be required to be described.

         Section 3.27 Bank Accounts and Powers of Attorney. Schedule 3.27 hereto
sets forth an accurate  and  complete  list  showing (a) the name and address of
each bank in which the  Company  and the  Subsidiaries  have an  account or safe
deposit box, the number of any such account or any such box and the names of all

                                       27
                                    ANNEX I
<PAGE>

persons  authorized to draw thereon or to have access  thereto and (b) the names
of all  persons,  if any,  holding  powers of attorney  from the Company and the
Subsidiaries and a summary statement of the terms thereof.

         Section 3.28 No Changes Prior to Closing  Date.  Except as set forth on
Schedule 3.28, during the period from the Balance Sheet Date to the date hereof,
except as expressly contemplated hereby and by the NARCO Agreements, the Company
and the  Subsidiaries  have not (a)  declared  or paid any  dividend or made any
distribution  on any shares of its capital  stock,  or  redeemed,  purchased  or
otherwise  acquired  any shares of its capital  stock or any option,  warrant or
other right to purchase or acquire any such shares, (b) made any bonus or profit
sharing  distribution  or payment of any kind, (c) written off as  uncollectible
any notes or accounts  receivable,  except  write-offs in the ordinary course of
business charged to applicable  reserves,  none of which  individually or in the
aggregate  is  material to the  Company  and the  Subsidiaries,  (d) granted any
increase in the rate of wages,  salaries,  bonuses or other  remuneration of any
executive  employee  or  other  employees,  except  in the  ordinary  course  of
business, (e) cancelled or waived any claims or rights of substantial value, (f)
made any change in any method of accounting or auditing practice, or (g) agreed,
whether or not in writing, to do any of the foregoing,  except to the extent any
such action would not have a Material Adverse Effect.

         Section 3.29 Broker's or Finder's Fees. Except as set forth on Schedule
3.29,  no agent,  broker,  person or firm acting on behalf of the Company is, or
will be, entitled to any commission or broker's or finder's fees from any of the
parties hereto,  or from any person  controlling,  controlled by or under common
control of such parties, with respect to the transactions contemplated herein.

         Section  3.30  Copies of  Documents.  The Company has caused to be made
available for inspection and copying by Abraxas and its advisers, true, complete
and correct  copies of all  documents  referred to in this Article III or in any
schedule furnished by the Company to Abraxas.

         Section  3.31  Environmental  Matters.  To the  best  knowledge  of the
Company and the Subsidiaries,

         (a)  Except as set forth in  Schedule  3.31  hereto,  (i)  neither  the
Company  nor any of the  Subsidiaries  has ever  generated,  transported,  used,
stored,  treated,  disposed of or managed any  Hazardous  Waste (as  hereinafter
defined),  except in the normal  course of business and in  compliance  with all
applicable  Environmental  Laws;  (ii) any  Hazardous  Material (as  hereinafter
defined)  spilled,  released,  or disposed of at any site  presently or formerly
owned,  operated,  leased or used by the Company or any of the  Subsidiaries has
been addressed in a manner that complied with all applicable  Environmental Laws
and no future soil or groundwater remediation that would have a Material Adverse
Effect will be required of the Company and the  Subsidiaries due to past spills,
releases,  or disposal;  (iii) no Hazardous  Material has ever been  transported
from any site  presently  or  formerly  owned,  operated,  leased or used by the

                                       28
                                    ANNEX I
<PAGE>

Company or any of the  Subsidiaries  for  treatment,  storage or disposal at any
other place), except in the normal course of business and in compliance with all
applicable  Environmental  Laws;  (iv)  neither  the  Company  nor  any  of  the
Subsidiaries  presently owns,  operates,  leases or uses, and has not previously
owned, operated,  leased or used any site on which underground storage tanks are
or were located and (v) no lien has ever been imposed by any governmental agency
on any property,  facility,  machinery or equipment owned,  operated,  leased or
used by the Company or any of the  Subsidiaries  in connection with the presence
of any Hazardous Material.

         (b)  Except as set forth on  Schedule  3.31  hereto:  (i)  neither  the
Company  nor  any of the  Subsidiaries  has  violated,  and as its  business  is
currently  being  conducted  does not violate,  any applicable  law,  ordinance,
rules,  prohibition or regulation,  including common law prohibitions  regarding
creation or  maintenance  of hazardous or nuisance  conditions,  relating to (1)
air, water or noise pollution,  (2) discharge of process water,  waste water, or
other solid wastes into public sewage systems, or into the environment either at
discreet  outfalls  or  from  non-point  sources,  (3)  the  health,  safety  or
environmental  conditions  on,  beneath,  or about any of the  properties  used,
owned, or leased by the Company or any of the Subsidiaries,  or (4) the business
of the  Company  or any of the  Subsidiaries;  and (ii) the  Company  and/or the
Subsidiaries  have timely  filed all  required  reports,  obtained  all required
approvals  and permits  relating to its property  and  business,  including  the
storage or  disposal  of  substances  used or  generated  in its  business,  and
generated and maintained all required data,  documentation and records under any
applicable Environmental Laws (as hereinafter defined).

         (c)  Except as set forth in  Schedule  3.31  hereto,  (i)  neither  the
Company nor any of the  Subsidiaries  has any material  liability under, and has
not  violated,  any  Environmental  Law;  (ii)  each  of  the  Company  and  the
Subsidiaries, any property owned, operated, leased or used by the Company or any
of the Subsidiaries  and any facilities and operations  thereon are presently in
compliance with all applicable Environmental Laws; (iii) neither the Company nor
any of the  Subsidiaries  has  entered  into or been  subject  to any  judgment,
consent decree,  compliance  order or  administrative  order with respect to any
environmental   or  health  and  safety  matter  or  received  any  request  for
information, notice, demand letter, administrative inquiry or formal or informal
complaint or claim with respect to any environmental or health and safety matter
or the enforcement of any Environmental  Law; and (iv) the Company has no reason
to believe that any of the items  enumerated  in clause (iii) of this  paragraph
will be forthcoming.

         (d)  Except  as set  forth in  Schedule  3.31  hereto,  no site  owned,
operated,  leased or used by the Company or any of the Subsidiaries contains any
material amount of asbestos or asbestos-containing material, any material amount
of polychlorinated  biphenyls ("PCBs") or equipment  containing PCBs or any urea
formaldehyde foam insulation.

         (e) Neither the  Company nor any of the  Subsidiaries  are aware of any
Critical  Habitat  for  endangered  or  threatened  species or  wetlands  on any
property owned, occupied or used by the Company or any of the Subsidiaries.

                                       29
                                    ANNEX I
<PAGE>

         (f)  Neither  the Company  nor any of the  Subsidiaries  have  received
notice of, and neither the Company nor any of the  Subsidiaries are aware of any
condition  or  event  relating  to the  Company's  or  any of the  Subsidiaries'
business or property which by the passage of time, to Seller's knowledge,  would
result in the  violation of any  Environmental  Laws or would  require  remedial
action  by the  Company  or any of the  Subsidiaries,  except  as  described  in
Schedule 3.31 hereto.

         (g) The Company has made  available  to Abraxas or its  representatives
originals or copies of all documents,  records and information  available to the
Company concerning any environmental or health and safety matter relevant to the
Company or any of the  Subsidiaries,  whether generated by the Company or any of
the Subsidiaries, including, without limitation, environmental risk assessments,
site  assessments,   documentation  regarding  off-site  disposal  of  Hazardous
Materials, spill control plans, and reports, correspondence,  permits, licenses,
approvals,  consents and other authorizations related to environmental or health
and safety matters issued by any governmental agency.

         (h) For purposes of this Section 3.31, (i) "Hazardous  Material"  shall
mean and include any  reportable  quantities of any hazardous  waste,  hazardous
material,   hazardous  substance,   petroleum  product,  oil,  toxic  substance,
pollutant or contaminant,  as defined or regulated under any Environmental  Law;
(ii) "Hazardous  Waste" shall mean and include any hazardous waste as defined or
regulated under any Environmental Law and (iii)  "Environmental  Law" shall mean
any applicable environmental or health and safety-related law, regulation, rule,
ordinance, order, injunction, decree, consent decree, judgment or administrative
directive  or by-law at the federal,  state or local  level,  existing as of the
date hereof or previously  enforced and relating to: (a) pollution or prevention
of pollution  (including  emissions of dust,  heat,  noise or odor) into or onto
ground,  subsurface  water,  groundwater  or the ambient air; (b)  protection of
human health and safety and of the environment; (c) the generation, manufacture,
processing,  distribution,  use,  treatment,  storage,  disposal,  transport  or
handling of any Hazardous Material; or (d) maintenance of water or air quality.

         Section  3.32  No  False  or  Misleading  Statements.  The  information
provided  and to be  provided  by the  Company  specifically  for use in the S-4
Registration  Statement shall not, with respect to the  information  supplied by
the Company in the case of the S-4  Registration  Statement  on the date the S-4
Registration  Statement  becomes  effective  and,  in  the  case  of  the  Proxy
Statement-Prospectus,  on the date upon which the Proxy  Statement-Prospectus is
mailed to the  stockholders of Abraxas or on the date upon which approval of the
Merger by the stockholders of Abraxas is obtained,  contain any untrue statement
of a material  fact or omit to state any  material  fact  required  to be stated
therein or necessary in order to make the  statements  therein,  in light of the
circumstances under which they were made, not misleading.

         Section  3.33  Disclosure.   None  of  this  Agreement,  the  Financial
Statements  (including  the  footnotes  thereto),  or any  Schedule,  Exhibit or
certificate  delivered  in  accordance  with the terms hereof or any document or

                                       30
                                    ANNEX I
<PAGE>

statement in writing which has been supplied by or on behalf of the Company,  or
by  any  of  the  Company's  directors  or  officers,  in  connection  with  the
transactions  contemplated  hereby,  contains any untrue statement of a material
fact or omits any  statement of a material  fact  necessary in order to make the
statements contained herein or therein not misleading.

         Section  3.34  DISCLAIMER  OF  REPRESENTATIONS  AND  WARRANTIES  OF THE
COMPANY.  THE  REPRESENTATIONS  AND WARRANTIES OF THE COMPANY  CONTAINED IN THIS
AGREEMENT ARE EXCLUSIVE AND IN LIEU OF ALL OTHER REPRESENTATIONS AND WARRANTIES,
EXPRESS OR IMPLIED,  AND THE COMPANY HEREBY DISCLAIMS ALL OTHER  REPRESENTATIONS
AND WARRANTIES, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING WITHOUT LIMITATION (i)
ANY EXPRESS OR IMPLIED WARRANTY OF MERCHANTABILITY,  (ii) ANY EXPRESS OR IMPLIED
WARRANTY  OF FITNESS  FOR A  PARTICULAR  PURPOSE,  (iii) ANY  EXPRESS OR IMPLIED
WARRANTY AS TO CONDITION,  OR (iv) ANY EXPRESS OR IMPLIED WARRANTY OF CONFORMITY
TO MODELS OR SAMPLES OF MATERIALS AND MAKES NO  REPRESENTATIONS AS TO QUALITY OR
QUANTITY OF HYDROCARBON  RESERVES (IF ANY)  ATTRIBUTABLE TO THE INTERESTS OR THE
ABILITY OF THE INTERESTS TO PRODUCE HYDROCARBONS.


                                   ARTICLE IV

                       REPRESENTATIONS OF ABRAXAS AND SUB

         Abraxas and Sub represent, warrant and agree as follows:

         Section  4.01  Existence  and Good  Standing of  Abraxas.  Abraxas is a
corporation duly organized, validly existing and in good standing under the laws
of the State of Nevada. Abraxas has the corporate power and authority to own its
properties and to carry on its business as now being conducted.  Abraxas is duly
qualified to do business and is in good standing in each  jurisdiction  in which
its  ownership  or  leasing of its  properties  or the  conduct of its  business
requires such qualification, except for jurisdictions in which the failure to be
so  qualified  or to be in  good  standing  would  not,  individually  or in the
aggregate, have a material adverse effect on the business, results of operations
or financial condition of Abraxas.

         Section 4.02  Existence  and Good Standing of Sub. Sub is a corporation
duly  organized,  validly  existing and in good  standing  under the laws of the
State  of  Delaware.  Sub has  the  corporate  power  and  authority  to own its
properties  and to carry on its  business  as now being  conducted.  Sub is duly
qualified to do business and is in good standing in each  jurisdictions in which
its  ownership  or  leasing of its  properties  or the  conduct of its  business
requires such qualification, except for jurisdictions in which the failure to be
so  qualified  or to be in  good  standing  would  not,  individually  or in the

                                       31
                                    ANNEX I
<PAGE>

aggregate, have a material adverse effect on the business, results of operations
or financial condition of Sub.

         Section 4.03 Existence and Good Standing of Canadian Abraxas.  Canadian
Abraxas Petroleum Limited ("Canadian  Abraxas") is a corporation duly organized,
validly existing and in good standing under the laws of the Province of Alberta.
Canadian Abraxas has the corporate power and authority to own its properties and
to carry on its  business  as now  being  conducted.  Canadian  Abraxas  is duly
qualified to do business and is in good standing in each  jurisdiction  in which
its  ownership  or  leasing of its  properties  or the  conduct of its  business
requires such qualification, except for jurisdictions in which the failure to be
so  qualified  or to be in  good  standing  would  not,  individually  or in the
aggregate, have a material adverse effect on the business, results of operations
or financial condition of Canadian Abraxas.

         Section 4.04  Corporate  Authority.  Abraxas and Sub have the requisite
corporate  power and  authority  to enter into this  Agreement  and the  Related
Agreements to which  Abraxas and Sub are a party.  The execution and delivery of
this  Agreement and the Related  Agreements to which Abraxas and Sub are a party
and the  consummation of the transactions  contemplated  hereby and thereby have
been duly and validly  authorized  by the Boards of Directors of Abraxas and Sub
and, other than the approval of the Abraxas stockholders,  if required by law or
the rules and regulations of the Nasdaq National Market (without reliance on the
19.9%  Alternative),  no other corporate  proceedings on the part of Abraxas are
necessary to authorize this Agreement and the transactions  contemplated  hereby
and thereby.  This Agreement is and the Related  Agreements to which Abraxas and
Sub are a party will be, duly and validly  executed and delivered by Abraxas and
Sub and,  assuming the due  authorization,  execution  and  delivery  hereof and
thereof by the other parties hereto and thereto, this Agreement constitutes, and
the Related  Agreements  to which  Abraxas and Sub are a party will  constitute,
valid and binding agreements of Abraxas and Sub enforceable  against Abraxas and
Sub in accordance with their  respective  terms,  subject to the approval of the
stockholders of Abraxas and the Enforceability Exception.

         Section 4.05  Broker's or Finder's  Fees. No agent,  broker,  person or
firm  acting  on  behalf  of  Abraxas  or Sub is,  or will be,  entitled  to any
commission or broker's or finder's fees from any of the parties hereto,  or from
any person  controlling,  controlled by or under common  control with any of the
parties hereto, in connection with any of the transactions contemplated herein.

         Section 4.06 Capital  Stock.  Abraxas has an authorized  capitalization
consisting of 50,000,000  shares of common stock,  par value $.01 per share,  of
which 6,279,146  shares are issued and outstanding and 53,023 shares are held in
Abraxas'  treasury,  1,000,000  shares of  Preferred  Stock,  par value $100 per
share,  of which  none are  outstanding.  Sub has an  authorized  capitalization
consisting of 1,000 shares of common stock,  par value $.01 per share,  of which
1,000 shares are issued and  outstanding.  All of such  outstanding  shares have
been duly  authorized and validly  issued and are fully paid and  nonassessable.

                                       32
                                    ANNEX I
<PAGE>

Except  as set  forth  in  Schedule  4.06,  there  are no  outstanding  options,
warrants,  rights,  calls,  commitments,  conversion rights, rights of exchange,
plans or other agreements of any character providing for the purchase,  issuance
or sale of any shares of Abraxas  Common  Stock or shares of the Common Stock of
Sub, other than as contemplated by this Agreement. Sub has no subsidiaries.

         Section  4.07  Books and  Records.  The  minute  books of  Abraxas,  as
previously  made  available  to the  Company  and its  representatives,  contain
accurate and complete  summaries  of all  meetings of and  corporate  actions or
written consents by the  stockholders and Board of Directors of Abraxas.  Except
as set  forth in  Schedule  4.07,  Abraxas  does  not  have any of its  records,
systems, controls, data or information recorded, stored, maintained, operated or
otherwise  wholly or partly  dependent upon or held by any means  (including any
electronic,  mechanical or photographic process, whether computerized or not and
all means of access  thereto and  therefrom)  which are not under the  exclusive
ownership and direct control of Abraxas.

         Section 4.08 Litigation. Except as set forth in Schedule 4.08, there is
no action, suit,  proceeding at law or in equity by any person or entity, or any
arbitration  or any  administrative  or other  proceeding  by or before  (or any
investigation by) any governmental or other instrumentality or agency,  pending,
or, to the best  knowledge of Abraxas or Sub,  threatened,  against or affecting
Abraxas,  Sub or Canadian  Abraxas,  or any of their  properties or rights which
could reasonably be expected to have a Material Adverse Effect;  and Abraxas and
Sub do not  know  of  any  valid  basis  for  any  such  action,  proceeding  or
investigation.  Abraxas,  Sub  and  Canadian  Abraxas  are  not  subject  to any
judgment,  order or decree  entered in any  lawsuit or  proceeding  which  could
reasonably be expected to have a Material Adverse Effect.

         Section 4.09 Taxes.  Abraxas,  Sub and  Canadian  Abraxas have filed or
caused to be filed,  within the times and in the manner  prescribed  by law, all
federal, state, provincial, local, tribal, severance, ad valorem and foreign tax
returns and tax reports  which are  required to be filed by, or with respect to,
Abraxas,  Sub and Canadian Abraxas.  Such returns and reports reflect accurately
all  liability  for taxes of Abraxas,  Sub and Canadian  Abraxas for the periods
covered thereby. All federal,  state, local, tribal,  severance,  ad valorem and
foreign income,  profits,  franchise,  sales, use,  occupancy,  excise and other
taxes and  assessments  (including  interest and  penalties)  payable by, or due
from, Abraxas,  Sub or Canadian Abraxas prior to Closing have been fully paid or
adequately  disclosed  and  fully  provided  for  in  the  books  and  financial
statements  of Abraxas  except as  provided in clause (v) of the  definition  of
Permitted Encumbrances.  Abraxas and Sub have no knowledge of any examination of
any tax  return  of  Abraxas,  Sub or  Canadian  Abraxas  that is  currently  in
progress. There are no outstanding agreements or waivers extending the statutory
period of limitation  applicable  to any tax return of Abraxas,  Sub or Canadian
Abraxas.

         Section  4.10  Copies  of  Documents.  Abraxas  has  caused  to be made
available  for  inspection  and copying by the Company and its  advisers,  true,
complete and correct  copies of all documents  referred to in this Article IV or

                                       33
                                    ANNEX I
<PAGE>

in any schedule  furnished by Abraxas to the Company or reasonably  requested in
writing by the Company.

         Section 4.11 Reports with the Securities and Exchange  Commission.  All
registration   statements,   reports,   proxy  statements  and  other  materials
(collectively,  "SEC  Reports")  required  to  be  filed  by  Abraxas  with  the
Commission since January 1, 1991 were filed within the applicable  required time
periods (or any extensions  related thereto),  complied in all respects with the
applicable  requirements  of the  Securities  Act  and  the  1934  Act  and  the
applicable rules and regulations of the Commission promulgated  thereunder,  and
at the time filed did not contain  any untrue  statement  of a material  fact or
omit to state a material fact required to be stated therein or necessary to make
the statements made therein, in light of the circumstances under which they were
made,  not  misleading.  Abraxas has  furnished  the Company  with  complete and
accurate  copies of its  quarterly  report on Form 10-Q for the  fiscal  quarter
ended June 30, 1997, and all other reports or documents  required to be filed by
Abraxas  pursuant to Section  13(a) or 15(d) of the 1934 Act since the filing of
the most recent quarterly  report on Form 10-Q. The consolidated  balance sheets
and the  related  statements  of  income,  stockholders'  equity  and cash  flow
(including  the related  notes  thereto) of Abraxas  included in the SEC Reports
complied  as to  form  in  all  material  respects  with  applicable  accounting
requirements  and the published  rules and  regulations of the  Commission  with
respect  thereto and have been prepared in accordance  with  generally  accepted
accounting  principles  applied on a basis consistent with prior periods (except
as otherwise  noted  therein).  The balance  sheets  included in the SEC Reports
present  fairly  the  consolidated   financial   position  of  Abraxas  and  its
consolidated subsidiaries as of their respective dates, and, except as indicated
therein, reflect all claims against and all debts and liabilities of Abraxas and
its consolidated  subsidiaries,  fixed or contingent, as at the respective dates
thereof,  and the related  statements of income,  stockholders'  equity and cash
flow  fairly  present the  results of its  operations  and its cash flow for the
periods  presented  therein  (subject,  in the  case  of the  unaudited  interim
financial statements, to normal year-end adjustments).  Since December 31, 1996,
there has been no material  adverse change in the assets or  liabilities,  or in
the  business  or  condition,  financial  or  otherwise,  or in the  results  of
operations of Abraxas and its consolidated  subsidiaries  taken as a whole other
than changes in the oil and gas industry  generally  and changes in the ordinary
course  of  business   consistent   with  past  practice  and,  other  than  the
transactions  contemplated  by this Agreement,  to the knowledge of Abraxas,  no
fact or condition exists or is contemplated or threatened which might cause such
a change in the future.

         Section  4.12  Restrictive  Documents.  Except as set forth in Schedule
4.12,  Abraxas and Sub are not subject to, or a party to, any  charter,  by-law,
mortgage, lien, lease, license, permit, agreement,  contract,  instrument,  law,
rule, ordinance, regulation, order, judgment or decree, or any other restriction
of any kind or character,  which would prevent  consummation of the transactions
contemplated  by this  Agreement,  compliance by Abraxas and Sub with the terms,
conditions  and  provisions  hereof or, to the knowledge of Abraxas and Sub, the
continued  operation of Abraxas' and Sub's  businesses  after the date hereof on
substantially the same basis as heretofore  operated or which would restrict the

                                       34
                                    ANNEX I
<PAGE>

ability of Abraxas or Sub to acquire  any  property  or conduct  business in any
area  except  as  would  not  have a  Material  Adverse  Effect.  Other  than in
connection or compliance  with the  provisions  of the  Securities  Act, and the
securities, takeover or blue sky laws of the various states, except as set forth
in Schedule 4.12, no authorization,  consent or approval of, or filing with, any
governmental body or authority, and no authorization, consent or approval of any
third party, is necessary for the  consummation  by Abraxas of the  transactions
contemplated by this Agreement, the Merger Agreement and the Related Agreements.

         Section 4.13 Title to Properties; Encumbrances. Except (i) as set forth
in Schedule 4.13,  (ii) for the real property  included in the Abraxas Wells (as
hereinafter  defined) or (iii) as reflected  in the SEC Reports,  and except for
properties  and assets  which  have been sold or  otherwise  disposed  of in the
ordinary course of business since December 31, 1996, Abraxas has good, valid and
marketable title free and clear of all liens, pledges,  encumbrances and adverse
claims  created  by,  through  or under  Abraxas  and its  subsidiaries  but not
otherwise  other  than  Permitted  Encumbrances,  to (a)  all  of  its  material
properties and assets (real and personal,  tangible and intangible),  including,
without limitation, all the properties and assets reflected in the balance sheet
of Abraxas dated  December 31, 1996,  except as indicated in the notes  thereto,
and (b) all the  properties  and assets  purchased by Abraxas since December 31,
1996.

         Section 4.14 Oil and Gas Reserve Report.  Abraxas has made available to
the Company  Abraxas'  Reserve  Report dated as of January 1, 1997 (the "Abraxas
Reserve  Report")  prepared  by D&M.  Abraxas  provided no  materially  false or
misleading  information  to and did not withhold any material  information  from
D&M, with respect to the preparation of the Abraxas  Reserve Report.  Abraxas is
not aware of any facts or circumstances  that should reasonably cause Abraxas to
conclude  that any of the  information  that was  supplied  by Abraxas to D&M in
connection with their preparation of the Abraxas Reserve Report is not currently
correct in all material respects except for the production of oil, gas and other
hydrocarbons in the ordinary course of business, the acquisition and disposition
of  interests  in oil and gas  properties  and  decreases  in oil and gas prices
generally in the United States and Canada.

         Section 4.15 Title to Interests.  (a) Schedule 4.15 identifies each oil
well and gas well  described in the Abraxas  Reserve Report in which Abraxas and
Canadian Abraxas own an interest,  vested or contingent,  and which is producing
or capable of producing hydrocarbons in commercial quantities (individually,  an
"Abraxas  Well" and,  collectively,  the "Abraxas  Wells") and (ii) Abraxas' and
Canadian  Abraxas' net revenue  interest  and  leasehold  cost bearing  interest
(i.e., working interest) in each Abraxas Well.

         (b) With respect to each Abraxas Well,  Abraxas' and Canadian  Abraxas'
interests therein are such that, after giving effect to existing spacing orders,
operating agreements,  unit agreements,  communitization  agreements and orders,
unitization  orders  and  pooling  designations  and  orders,   subject  to  the
limitations  described in Schedule  4.15 and Permitted  Encumbrances,  and after
taking into account all royalty interests,  overriding  royalty  interests,  net

                                       35
                                     ANNEX I
<PAGE>

profits  interests,   production   payments  and  other  burdens  on  production
attributable  to third parties,  (i) Abraxas and Canadian  Abraxas are entitled,
during the respective terms of the oil and gas leases covering such Abraxas Well
(the  "Abraxas  Leases"  and,  together  with the Abraxas  Wells,  the  "Abraxas
Interests"),  to a share  (expressed  as a  decimal)  of all oil,  gas and other
minerals produced from such Abraxas Well which is not less than the "net revenue
interest" set forth in  connection  with the  description  of such Abraxas Well,
free and clear of all liens, claims,  mortgages,  deeds of trust, assignments of
production,  and security interests, other than those described in Schedule 4.15
and those that would not render  title less than  Defensible,  (ii)  Abraxas and
Canadian Abraxas own an undivided interest (expressed as a decimal) equal to the
"working  interest" set forth in connection with the description of such Abraxas
Well in and to all property and rights  incident  thereto,  including all rights
in, to and under all agreements, leases, permits, easements, licenses and orders
in any  way  relating  thereto,  and in and  to all  wells,  personal  property,
fixtures and improvements  thereon,  appurtenant  thereto or used or obtained in
connection  therewith or with the production or treatment or sale or disposal of
hydrocarbons  or water produced  therefrom or  attributable  thereto,  and (iii)
Abraxas and Canadian Abraxas are obligated,  during the entire extended terms of
the Abraxas Leases to which  production from such Abraxas Well is  attributable,
for a share of the costs relating to the exploration, development, and operation
of such Abraxas Well which is no greater than the "working  interest"  set forth
in connection with the description of such Abraxas Well.

         Section  4.16  No  False  or  Misleading  Statements.  The  information
provided  and to be  provided  by  Abraxas  specifically  for  use  in  the  S-4
Registration  Statement shall not, with respect to the  information  supplied by
Abraxas  in the  case of the S-4  Registration  Statement  on the  date  the S-4
Registration  Statement  becomes  effective  and,  in  the  case  of  the  Proxy
Statement-Prospectus,  on the date upon which the Proxy  Statement-Prospectus is
mailed to the  stockholders of Abraxas or on the date upon which approval of the
Merger by the stockholders of Abraxas is obtained,  contain any untrue statement
of a material  fact or omit to state any  material  fact  required  to be stated
therein or necessary in order to make the  statements  therein,  in light of the
circumstances under which they were made, not misleading.

         Section  4.17  Disclosure.   None  of  this  Agreement,  the  Financial
Statements  (including the footnotes thereto),  the SEC Reports or any Schedule,
Exhibit or  certificate  delivered  in  accordance  with the terms hereof or any
document  or  statement  in writing  which has been  supplied by or on behalf of
Abraxas,  or by any of Abraxas'  directors or officers,  in connection  with the
transactions  contemplated  hereby,  contains any untrue statement of a material
fact or omits any  statement of a material  fact  necessary in order to make the
statements contained herein or therein not misleading.

         Section 4.18  DISCLAIMER OF  REPRESENTATIONS  AND WARRANTIES OF ABRAXAS
AND SUB. THE REPRESENTATIONS AND WARRANTIES OF ABRAXAS AND SUB CONTAINED IN THIS
AGREEMENT ARE EXCLUSIVE AND IN LIEU OF ALL OTHER REPRESENTATIONS AND WARRANTIES,

                                       36
                                    ANNEX I
<PAGE>

EXPRESS  OR   IMPLIED,   AND  ABRAXAS   AND  SUB  HEREBY   DISCLAIM   ALL  OTHER
REPRESENTATIONS  AND  WARRANTIES,  EXPRESS,  IMPLIED,  OR  STATUTORY,  INCLUDING
WITHOUT LIMITATION (i) ANY EXPRESS OR IMPLIED WARRANTY OF MERCHANTABILITY,  (ii)
ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR  PURPOSE,  (iii) ANY
EXPRESS OR IMPLIED  WARRANTY  AS TO  CONDITION,  OR (iv) ANY  EXPRESS OR IMPLIED
WARRANTY  OF  CONFORMITY  TO  MODELS  OR  SAMPLES  OF  MATERIALS  AND  MAKES  NO
REPRESENTATIONS  AS TO QUALITY OR  QUANTITY  OF  HYDROCARBON  RESERVES  (IF ANY)
ATTRIBUTABLE TO THE ABRAXAS INTERESTS OR THE ABILITY OF THE INTERESTS TO PRODUCE
HYDROCARBONS.


                                    ARTICLE V

                                    COVENANTS

         Section 5.01 Conduct of Business of the Company and Abraxas. During the
period from the date of this Agreement to the Effective  Time, or the dates,  if
any, on which this  Agreement is earlier  terminated  pursuant to Section  10.14
hereof, each of Abraxas and the Company shall conduct its respective  operations
only  according to its ordinary and usual course of business and use  reasonable
best  efforts to preserve  intact its  respective  business  organization,  keep
available  the services of its  respective  officers and  employees and maintain
satisfactory  relationships with licensors,  suppliers,  distributors,  lessees,
clients and others having business  relationships with it.  Notwithstanding  the
immediately preceding sentence,  pending the Effective Time and except as may be
first approved by Abraxas or the Company, as the case may be, or as is otherwise
permitted or required by this  Agreement,  each of Abraxas,  Sub and the Company
will (a) cause its Certificate of Incorporation  and By-Laws to be maintained in
their form on the date of this  Agreement;  (b)  refrain  from making any bonus,
pension,  retirement or insurance  payment or arrangement to or with any persons
except those that may have already been accrued and from increasing any benefits
payable under any Employee Program;  (c) refrain from entering into any contract
or commitment  except contracts in the ordinary course of business;  (d) refrain
from making any change  affecting  any bank,  safe  deposit or power of attorney
arrangements;   and  (e)  refrain  from  declaring,  setting  aside,  paying  or
distributing any dividends or distribution  with respect to its capital stock or
engage in any similar recapitalization.  During the period from the date of this
Agreement to the  Effective  Date,  each of Abraxas,  Sub and the Company  shall
confer on a regular and frequent basis to report  material  operational  matters
and to report the general status of ongoing operations. Each of Abraxas, Sub and
the Company shall notify the other of any  unexpected  emergency or other change
in the normal course of its business or in the operation of its  properties  and
of any governmental  complaints,  investigations or hearings (or  communications
indicating that the same may be contemplated),  adjudicatory proceedings, budget
meetings or submissions  involving any material property of Abraxas,  Sub or the
Company,  and to keep each other  fully  informed of such events and permit each

                                       37
                                    ANNEX I
<PAGE>

other's  respective  representatives  prompt access to all materials prepared in
connection therewith. Notwithstanding anything to the contrary set forth in this
Section  5.01,  Vessels  may cause the  Termination  (as  defined  in the Escrow
Agreement) of the Enron  Contract  prior to Closing or in lieu thereof may enter
into an  agreement  (the "Enron  Administration  Agreement")  with an agent (the
"Enron  Agent")  relating to the  administration  of that  certain Gas Sales and
Purchase  Contract dated February 1, 1997 (the "Enron  Contract") by and between
Enron Capital and Trade Resources Corp. and Vessels Hydrocarbons, Inc. The Enron
Administration  Agreement shall be in form and substance reasonably satisfactory
to Abraxas,  shall provide that the  Representative  may replace the Enron Agent
with a successor agent reasonably satisfactory to Abraxas and shall provide that
the Enron Agent  shall (i) arrange for the gas supply to supply the  obligations
of the Enron Contract,  (ii) receive all  nominations  under the Enron Contract,
(iii) manage and utilize the Transportation Agreements (as defined in the Escrow
Agreement),  (iv) arrange for the purchase and sale of gas at the various points
accessible by the  Transportation  Agreements and (v) take such other actions as
are reasonably  necessary to administer the Enron  Contract,  which Vessels will
perform as a reasonably prudent operator.

         Section 5.02 Exclusive Dealing. During the period from the date of this
Agreement  to the  Effective  Time,  the  Company  shall not take any action to,
directly  or  indirectly,  encourage,  initiate  or  engage  in  discussions  or
negotiations  with,  or  provide  any  information  to, any  Person,  other than
Abraxas,  concerning  any  purchase of the Stock or any merger or sale of all or
substantially  all of the assets of the Company and the  Subsidiaries or similar
transaction involving the Company and any of the Subsidiaries.

         Section 5.03 Review of the Company and Abraxas. (a) Each of Abraxas and
the  Company  may,  prior  to  the  Closing  Date,   through  their   respective
representatives,  review the  properties,  books and  records of the Company and
Abraxas  and  their  respective  financial  and  legal  condition  as they  deem
necessary or advisable to familiarize  themselves with such properties and other
matters;  such  review  shall  not,  however,  affect  the  representations  and
warranties made by the Company, Abraxas and Sub hereunder.

         (b) Each of Abraxas and the Company  shall  permit each other and their
respective  representatives  to have, after the date of execution  hereof,  full
access to the premises and to all the books and records of the Company,  Abraxas
and Sub and to cause the  officers  of the  Company,  Abraxas and Sub to furnish
each other with such  financial and operating  data and other  information  with
respect to the business and  properties of Abraxas,  Sub and the Company as they
shall from time to time reasonably  request. In the event of termination of this
Agreement,  each of Abraxas and the Company shall keep confidential any material
information  obtained from the other  concerning the properties,  operations and
business (unless readily  ascertainable from public or published  information or
trade   sources)   until  the  same  ceases  to  be  material   (or  becomes  so
ascertainable)  and shall  return to each  other  all  copies of any  schedules,
statements,  documents  or other  written  information  obtained  in  connection
therewith.  Abraxas,  Sub and the Company shall deliver or cause to be delivered
on the Closing  Date,  and at such other times and places as shall be reasonably

                                       38
                                    ANNEX I
<PAGE>

agreed upon,  such  additional  instruments as the Company,  Abraxas and Sub may
reasonably request for the purpose of carrying out this Agreement.

         Section  5.04  Regulatory  and Other  Filings  and  Approvals.  Each of
Abraxas,  Sub and the Company shall duly make all regulatory filings required to
be made by each in respect of this  Agreement or the  transactions  contemplated
hereby.  Abraxas, Sub and the Company shall use all reasonable efforts to obtain
all regulatory approvals necessary to carry out the transactions contemplated by
this Agreement.

         Section  5.05 Best  Efforts.  Subject  to the  fiduciary  duties of the
directors of Abraxas,  Sub and the Company  under  applicable  law as advised by
counsel,  each of Abraxas,  Sub and the Company  agrees to use its best  efforts
promptly  to take,  or cause to be taken,  all actions and to do, or cause to be
done,  all things  necessary,  proper or  advisable  to  consummate  and to make
effective  the  transactions  contemplated  by this  Agreement  and the  Related
Agreements,  including the satisfaction of all conditions thereto, and shall use
their best efforts to obtain all waivers, permits, consents and approvals and to
effect  all  registrations,  filings  and  notices  with or to third  parties or
governmental  or  public  bodies or  authorities  that are,  in the  opinion  of
Abraxas,  Sub and the Company,  necessary or  desirable in  connection  with the
transactions   contemplated  by  this  Agreement  and  the  Related  Agreements,
including,  without  limitation,  filings and  approvals to the extent  required
under the Delaware Statute, the Nevada Statute, the securities, takeover or blue
sky laws of the various  states,  the  Securities  Act, the  regulatory  laws of
various  states in which  Abraxas,  Sub and the Company  conduct  business,  and
consents and waivers required under any material contracts,  agreements, leases,
licenses or other documents to which Abraxas,  Sub or the Company is a party. If
at any time  after  the  Effective  Time any  further  action  is  necessary  or
desirable  to  carry  out  the  purposes  of  this  Agreement  and  the  Related
Agreements,  the proper  officers or directors  of Abraxas,  Sub and the Company
shall take such action.

         Section 5.06  Affiliate  Agreements.  The Company  shall,  prior to the
Effective Date, cause to be delivered to Abraxas a list, reviewed by its counsel
and reasonably satisfactory to Abraxas,  identifying all persons who are, in its
opinion, at the time of the meeting of the Company's  stockholders to be held in
accordance with Article II, "affiliates" of the Company for purposes of Rule 145
under the  Securities  Act.  The Company  shall  furnish  such  information  and
documents as Abraxas may  reasonably  request for the purpose of reviewing  such
list.  The  Company  shall use its best  efforts  to cause  each  person  who is
identified as an "affiliate" in the list furnished pursuant to this Section 5.06
to execute a written  agreement  on or prior to the  Effective  Date,  in a form
satisfactory to the other (an "Affiliate Agreement"), that such person shall not
offer or sell or otherwise  dispose of any of the shares of Abraxas Common Stock
issued to such person  pursuant to the Merger in violation of the Securities Act
or the rules and regulations promulgated by the Commission thereunder.

         Section  5.07  Public  Announcements.  Abraxas  and the  Company  shall
consult each other before issuing any press release or other public announcement

                                       39
                                    ANNEX I
<PAGE>

regarding the Merger, and shall not issue any such press release or other public
announcement without the consent of the other unless required by law, as advised
by  counsel,  or by  obligations  pursuant  to any  listing  agreement  with any
national securities exchange.

         Section 5.08  Tax-Free  Reorganization.  Abraxas and the Company  shall
each use its best efforts to cause the Merger to be treated as a  reorganization
within the meaning of Section 368(a) of the Code.

         Section 5.09 Nasdaq  Quotation.  Abraxas  shall use its best efforts to
cause  the  shares of  Abraxas  Common  Stock to be  issued in the  Merger to be
approved for quotation on the Nasdaq National Market, subject to official notice
of issuance, prior to the Effective Time.

         Section 5.10  Issuance of  Securities.  Except as set forth on Schedule
5.10, without the prior written consent of the Company,  Abraxas shall not issue
or agree to issue any shares of  capital  stock  (except  upon the  exercise  of
outstanding rights, options or warrants to purchase common stock in exchange for
full  payment),  bonds or other  corporate  securities  at a price less than the
Average Price during the period between the date hereof and the Effective Time.

         Section 5.11      Benefit Plans and Related Matters.

         (a) Abraxas  shall take such  actions as are  necessary  to fulfill the
Company's  severance  obligations to its employees as set forth on Schedule 3.25
and to make  available  to former  employees of the Company  continued  employee
benefits after the Effective  Time as required by COBRA.  Abraxas shall maintain
health  benefit and other  welfare  plan  coverage  for former  employees of the
Company for six months  after the  Effective  Time under the health  benefit and
each  other  welfare  plan  maintained  by the  Company  immediately  before the
Effective Time.  Abraxas shall maintain the Vessels Oil and Gas Company Employee
Savings Plan (the  "Vessels  401(k)  Plan") for six months  after the  Effective
Time,  at which time the  Vessels  401(k)  Plan shall be merged into the Abraxas
401(k) Profit Sharing Plan.  The former  employees of the Company shall continue
to participate in the Vessels 401(k) Plan for six months following the Effective
Time.

         (b) Other than as set forth in Sections  5.11(a) and (c) and subject to
the  provisions of Abraxas'  policies and programs,  any employee of the Company
retained  by  Abraxas  or its  affiliates  after the  Effective  Time  (each,  a
"Transferred Employee") shall be eligible to participate or eligible for accrual
of  benefits,  vesting  and  contributions  or  accruals  to be made or credited
following  the Effective  Time under each of Abraxas'  employee  benefit  plans,
programs  or  arrangements  available  to all or  substantially  all of Abraxas'
employees, subject to the terms upon which such plans allow new participation by
Abraxas'  employees.  Each  Transferred  Employee  shall  be  credited  with the
time-in-service that the employee accrued with the Company or its Subsidiaries.

                                       40
                                    ANNEX I
<PAGE>

         (c) Except as expressly  provided in this Section 5.11,  Abraxas has no
obligation to (i) make any  contributions or accruals with respect to any period
preceding  the  Effective  Time,  (ii) offer  Transferred  Employees the same or
comparable  employee plans or benefits as those offered by the Company, or (iii)
assume any  liability  of the Company  with  respect to the  Company's  employee
benefit  plans or  severance  policy,  accrued  vacation  or sick  leave for the
Company's employees,  or the Company's  employment of the Transferred  Employees
prior to the Effective  Time.  This Agreement is not intended to create and does
not create any  contractual or legal rights in or enforceable by any employee of
the Company or upon any party other than the  Company and  Abraxas.  Any oral or
written  communications  to the employees of the Company  concerning the subject
matter of this  Section  5.11 shall be  approved  in advance by the  Company and
Abraxas.

         Section 5.12      Indemnification; Directors' and Officers' Insurance.

         (a) From and after the  Effective  Time,  Abraxas  agrees  that it will
indemnify and hold harmless each present and former  director  and/or officer of
the Company (the "Indemnified  Parties"),  that is made a party or threatened to
be  made  a  party  to any  threatened,  pending  or  completed,  action,  suit,
proceeding or claim, whether civil,  criminal,  administrative or investigative,
by reason of the fact that he or she was a director or officer of the Company or
any of the  Subsidiaries  prior to the Effective Time and arising out of actions
or omissions of the Indemnified Party in any such capacity occurring at or prior
to the  Effective  Time (a "Claim")  against  any costs or  expenses  (including
reasonable  attorneys'  fees),  judgments,  fines,  amounts  paid in  settlement
pursuant  to  Section   5.12(b),   losses,   claims,   damages  or   liabilities
(collectively,  "Costs")  reasonably  incurred  in  connection  with any  Claim,
whether  asserted or claimed  prior to, at or after the  Effective  Time, to the
fullest extent that the Company would have been permitted  under  applicable law
and the Company's  Certificate of Incorporation  and By-laws in effect as of the
Closing  Date.  Abraxas  shall  also  advance  expenses  (including   reasonable
attorneys' fees), as reasonably incurred by the Indemnified Party to the fullest
extent permitted under  applicable law provided such Indemnified  Party provides
an undertaking to repay such advances if it is ultimately  determined  that such
Indemnified Party is not entitled to indemnification.

         (b) Any  Indemnified  Party  wishing  to  claim  indemnification  under
paragraph  (a) of this  Section  5.12 upon  learning  of any such  Claim,  shall
promptly notify Abraxas thereof,  but the failure to so notify shall not relieve
Abraxas of any liability it may have to such  Indemnified  Party if such failure
does not materially  prejudice Abraxas. In the event of any such claim,  action,
suit, proceeding or investigation (whether arising before or after the Effective
Time),  (i)  Abraxas  shall have the right to assume  the  defense  thereof  and
Abraxas shall not be liable to such  Indemnified  Parties for any legal expenses
of other counsel or any other expenses subsequently incurred by such Indemnified
Parties in connection  with the defense  thereof,  except that if Abraxas elects
not to assume  such  defense or counsel or the  Indemnified  Parties  advise and
Abraxas' counsel concurs that there are issues which raise conflicts of interest

                                       41
                                    ANNEX I
<PAGE>

between Abraxas and the Indemnified Parties, in either such case the Indemnified
Parties may retain  counsel  satisfactory  to them,  and  Abraxas  shall pay all
reasonable  fees  and  expenses  of such  counsel  for the  Indemnified  Parties
promptly as statements therefor are received;  provided,  however,  that Abraxas
shall be obligated  pursuant to this  paragraph  (b) to pay for only one firm or
counsel for all Indemnified  Parties in any  jurisdiction  unless the use of one
counsel for such Indemnified  Parties would present such counsel with a conflict
of interest,  (ii) the Indemnified  Parties will cooperate in the defense of any
such  matter  and (iii)  Abraxas  shall not be liable  for any  amounts  paid in
settlement effected without its prior written consent, which consent will not be
unreasonably  withheld; and provided,  further,  however, that Abraxas shall not
have any obligation  hereunder to any  Indemnified  Party when and if a court of
competent jurisdiction shall ultimately determine,  and such determination shall
have  become  final  and  non-appealable,   that  the  indemnification  of  such
Indemnified  Party in a manner  contemplated  hereby is prohibited by applicable
law. If such indemnity is not available with respect to any  Indemnified  Party,
then Abraxas and the Indemnified Party shall contribute to the amount payable in
such proportion as is appropriate to reflect relative faults and benefits,  with
any aspect of "fault"  otherwise  allocable  to the Company  being  allocated to
Abraxas.

         (c) If a Claim under this  Section  5.12 is not paid in full by Abraxas
within  thirty  days  after a written  request  therefor  has been  received  by
Abraxas,  the Indemnified  Party may at any time  thereafter  bring suit against
Abraxas to recover the unpaid amount of the Claim and, if successful in whole or
in part, the Indemnified  Party shall be entitled to be paid also the expense of
prosecuting such Claims.

         (d) Neither the failure of Abraxas  (including  its Board of Directors,
independent legal counsel or stockholders) to have made a determination prior to
the commencement of such suit that  indemnification  of the Indemnified Party is
proper in the circumstances because he or she has met the applicable standard of
conduct,  nor an  actual  determination  by  Abraxas  (including  its  Board  of
Directors,  independent  legal counsel,  or  stockholders)  that the Indemnified
Party has not met such applicable standard of conduct, shall be a defense to the
suit  or  create  a  presumption  that  the  Indemnified  Party  has not met the
applicable standard of conduct.

         (e) For a period of six (6) years  after the  Effective  Time,  Abraxas
shall maintain the Company's existing directors and officers liability insurance
or equivalent liability insurance ("D&O Insurance"), which will provide coverage
for the  Indemnified  Parties so long as the annual  premium  therefor is not in
excess of 150% of the last annual  premium paid by the Company prior to the date
hereof  (the  "Current  Premium").  If Abraxas  determines  that it is unable to
maintain the existing or equivalent D&O Insurance that includes coverage for the
Indemnified  parties for a premium not in excess of 150% of the Current Premium,
but  maintains  D&O  Insurance  for persons who are  directors  and  officers of
Abraxas,  then, for the six-year period after the Effective  Time,  Abraxas will
provide D&O Insurance for the  Indemnified  Parties on the same basis as Abraxas
maintains  D&O  Insurance  for persons who are then  directors  and  officers of
Abraxas. If the existing D&O Insurance expires, is terminated or canceled during
the six-year  period after the Effective Time and Abraxas does not then maintain

                                       42
                                    ANNEX I
<PAGE>

D&O Insurance  for persons who are  directors  and officers of Abraxas,  Abraxas
will use its  reasonable  efforts  to  obtain  D&O  Insurance  for  such  period
providing at least  $1,000,000 of coverage for those persons who are Indemnified
Parties.

         (f) In lieu of the insurance  arrangement  referred to in clause (e) of
this Section 5.12, Abraxas may, on or before the Closing, enter into alternative
insurance arrangements,  provided that such arrangements are approved by each of
the individuals who are independent directors and officers of the Company at any
time from the date of this Agreement through the Effective Time.

         Section 5.13 New Executive  Officers and  Directors.  In the event that
Abraxas  elects  executive  officers  and  directors  who are not parties to the
Voting Agreements,  Abraxas shall cause such executive officers and directors to
execute and deliver a Voting Agreement in substantially  the form of Exhibit E-2
attached hereto.


                                   ARTICLE VI

                       CONDITIONS TO ABRAXAS' OBLIGATIONS

         All obligations of Abraxas to be discharged under this Agreement at the
Closing are subject to the fulfillment,  prior to or at the Closing,  of each of
the following  conditions,  unless waived pursuant to Section 2.03 or in writing
by Abraxas prior to or at the Closing:

         Section  6.01  Opinion  of  Company  Counsel.  The  Company  shall have
furnished  Abraxas with a favorable  opinion,  dated the Closing Date, of King &
Spalding  in form and  substance  reasonably  satisfactory  to  Abraxas  and its
counsel,  to the effect set forth in Exhibit H hereto which opinion may rely, to
the extent reasonably agreed upon by Abraxas and its counsel, upon an opinion of
the general counsel of the Company.

         Section 6.02 Good Standing and Tax Certificates. The Company shall have
delivered  to  Abraxas  (a)  copies of the  charter,  including  all  amendments
thereto,  certified by the Secretary of State or other  appropriate  official of
the jurisdiction of  incorporation of the Company and each of the  Subsidiaries;
(b) certificates  from the Secretary of State or other  appropriate  official of
the  jurisdiction  of  incorporation  to the  effect  that the  Company  and the
Subsidiaries are in good standing or subsisting in such jurisdiction and listing
all  charter  documents  of the  Company  and the  Subsidiaries  on file;  (c) a
certificate  from the Secretary of State or other  appropriate  official in each
State in which the Company and the  Subsidiaries are qualified to do business to
the effect that the Company and the  Subsidiaries  are in good  standing in such
state;  and  (d)  certificates  as to the  tax  status  of the  Company  and the
Subsidiaries in their respective  jurisdictions of incorporation  and each state
in which the Company and the Subsidiaries are qualified to do business.

                                       43
                                    ANNEX I
<PAGE>

         Section 6.03 No Material  Adverse  Change.  Prior to the Closing  Date,
there shall have been no material  adverse change in the assets or  liabilities,
the business or condition, financial or otherwise, the results of operations, or
prospects  of the  Company and the  Subsidiaries  taken as a whole that would or
would be  reasonably  likely to have a Material  Adverse  Effect other than such
change that affects  Abraxas and the Company in a  substantially  similar manner
and the Company shall have delivered to Abraxas a certificate, dated the Closing
Date, to such effect.  A change resulting from a change in the prices of oil and
gas,  stock  market  conditions,  general  economic  conditions  or oil  and gas
industry  conditions will not be deemed to be a material adverse change pursuant
to this Section 6.03.

         Section   6.04   Truth   of   Representations   and   Warranties.   The
representations  and warranties of the Company contained in this Agreement or in
any Schedule  delivered  pursuant  hereto shall be  materially  true and correct
(except  for  such   representations  and  warranties  which  are  qualified  by
"material" or "Material  Adverse Effect" which shall be true and correct) on and
as of the Closing Date with the same effect as though such  representations  and
warranties had been made on and as of such date except as expressly contemplated
herein or in the Schedules delivered pursuant to this Agreement, and the Company
shall have  delivered  to Abraxas on the Closing Date a  certificate,  dated the
Closing Date, to such effect.

         Section 6.05 Performance of Agreements.  Each and all of the agreements
of the Company to be  performed  on or before the Closing  Date  pursuant to the
terms hereof shall have been duly  performed in all material  respects,  and the
Company shall have delivered to Abraxas a  certificate,  dated the Closing Date,
to such effect.

         Section 6.06 No Litigation  Threatened.  No action or proceedings 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, and the Company shall have
delivered to Abraxas a certificate, dated the Closing Date, to such effect.

         Section 6.07 Governmental  Approvals.  Other than approvals referred to
in Section 6.12, all  governmental  and other  consents and  approvals,  if any,
necessary to permit the  consummation of the  transactions  contemplated by this
Agreement shall have been received.  No governmental  action or proceeding shall
have been commenced or threatened  seeking any injunction,  restraining order or
other order  which  seeks to  prohibit,  restrain,  invalidate  or set aside the
effectuation of the Merger.

         Section 6.08  Intra-Company  Debt. All  indebtedness  of the directors,
officers and  employees of the Company and the  Subsidiaries  to the Company and
the Subsidiaries shall have been repaid in full.

                                       44
                                    ANNEX I
<PAGE>

         Section 6.09 Proceedings. All proceedings to be taken by the Company in
connection  with  the  transactions  contemplated  by  this  Agreement  and  all
documents  incident  thereto  shall  be  reasonably  satisfactory  in  form  and
substance to Abraxas and its counsel and Abraxas shall have  received  copies of
all such  documents  and other  evidences  as it or its counsel  may  reasonably
request in order to establish  the  consummation  of such  transactions  and the
taking of all proceedings in connection therewith.

         Section 6.10 Escrow  Agreements.  The Company  shall have  executed and
delivered the Escrow Agreement and the Provisional Payment Escrow Agreement.

         Section 6.11 Stockholder Approval.  This Agreement shall have been duly
approved by the Vessels Stockholders in accordance with applicable law.

         Section 6.12  Effectiveness of S-4 Registration  Statement.  Subject to
Section 2.03 of this Agreement, the S-4 Registration Statement shall have become
effective and no stop order  suspending  the  effectiveness  thereof shall be in
effect and no proceedings for such purpose shall be pending or threatened before
the Commission.

         Section 6.13  Affiliate  Agreements.  Abraxas  shall have obtained from
each  Person who is  identified  in the list  referred  to in Section  5.06 as a
Person who may be deemed to be an  "affiliate"  of the Company  for  purposes of
Rule 145 under the Securities Act, an Affiliate  Agreement  substantially in the
form  previously  provided to the Company  with respect to the shares of Abraxas
Common Stock to be received by such Person in the Merger.

         Section 6.14 Dissenters' Rights. The number of holders of shares of the
Stock exercising appraisal rights under the Delaware Statute shall not exceed 5%
of the  shares  of the  Stock  issued  and  outstanding  as of the  date of this
Agreement.

         Section 6.15 Options and  Warrants.  All options to purchase the Shares
shall have been  terminated  and all  Warrants to purchase the Shares other than
those held by  Associated  Energy  Managers,  Inc.  ("AEM") and Chase  Manhattan
Investment Holdings, Inc. ("Chase") shall have been terminated.

         Section 6.16  Vessels  Stockholder  Agreement.  The Vessels Oil and Gas
Company Amended and Restated Stockholders Agreement shall have been terminated.

         Section 6.17 Bank of Montreal. That certain Short-Term Credit Agreement
dated  October 2, 1996 by and between  the  Company  and Bank of  Montreal  (the
"Bank") shall have been  terminated  with funds provided by Abraxas and the Bank
shall have released any liens,  encumbrances and security  interests it may have
on the assets of the Company and the Subsidiaries.

                                       45
                                    ANNEX I
<PAGE>

                                   ARTICLE VII

                     CONDITIONS TO THE COMPANY'S OBLIGATIONS

         All obligations of the Company to be discharged under this Agreement at
the Closing are subject to the fulfillment,  prior to or at the Closing, of each
of the  following  conditions,  unless  waived  pursuant  to Section  2.03 or in
writing by the Company prior to or at the Closing:

         Section 7.01 Opinion of Purchaser's Counsel. Abraxas and Sub shall have
furnished the Company with a favorable opinion, dated the Closing Date, of Cox &
Smith Incorporated in form and substance reasonably  satisfactory to the Company
and its counsel to the effect set forth in Exhibit I hereto.

         Section   7.02   Truth   of   Representations   and   Warranties.   The
representations and warranties of Abraxas and Sub contained in this Agreement or
in any Schedule  delivered  pursuant hereto shall be materially true and correct
(except  for  such   representations  and  warranties  which  are  qualified  by
"material" or "Material  Adverse Effect" which shall be true and correct) on and
as of the Closing Date with the same effect as though such  representations  and
warranties  had been made on and as of such date; and Abraxas and Sub shall have
delivered  to the Company on the Closing Date a  certificate,  dated the Closing
Date, to such effect.

         Section 7.03  Governmental  Approvals.  All  governmental and all other
consents and  approvals,  if any,  necessary to permit the  consummation  of the
transactions  contemplated  by this  Agreement  shall  have  been  received.  No
governmental  action or  proceeding  shall  have been  commenced  or  threatened
seeking  any  injunction,  restraining  order  or  other  order  which  seeks to
prohibit, restrain, invalidate or set aside the effectuation of the Merger.

         Section  7.04  Escrow  Agreements.  Abraxas  shall  have  executed  and
delivered the Escrow Agreement and the Provisional Payment Escrow Agreement.

         Section  7.05  Registration  Rights  Agreements.   Abraxas  shall  have
executed and delivered the Registration Rights Agreements.

         Section  7.06  Letter  Agreement.   Abraxas  shall  have  executed  and
delivered the Letter Agreement.

         Section 7.07 No Material  Adverse  Change.  Prior to the Closing  Date,
there shall have been no material  adverse change in the assets or  liabilities,
the business or condition, financial or otherwise, the results of operations, or
prospects of Abraxas on a  consolidated  basis that would or would be reasonably
likely to have a Material  Adverse  Effect  other than such change that  affects
Abraxas and the Company in a substantially similar manner and Abraxas shall have
delivered to the Company a certificate,  dated the Closing Date, to such effect.

                                       46
                                    ANNEX I
<PAGE>

A change  resulting  from a change in the  prices of oil and gas,  stock  market
conditions,  general economic conditions or oil and gas industry conditions will
not be deemed to be a material adverse change pursuant to this Section 7.07.

         Section 7.08 No Litigation  Threatened.  No action or proceedings shall
have been instituted or, to the best knowledge of Abraxas,  threatened  before a
court or  other  government  body or by any  public  authority  to  restrain  or
prohibit any of the transactions  contemplated hereby, and Abraxas and Sub shall
have  delivered to the Company a  certificate,  dated the Closing  Date, to such
effect.

         Section  7.09 Good  Standing  and Tax  Certificates.  Abraxas,  Sub and
Canadian  Abraxas shall have delivered to the Company (a) copies of the charter,
including all amendments  thereto,  certified by the Secretary of State or other
appropriate  official of the jurisdiction of  incorporation of Abraxas,  Sub and
Canadian  Abraxas;  (b)  certificates  from  the  Secretary  of  State  or other
appropriate  official of the  jurisdiction of  incorporation  to the effect that
Abraxas,  Sub and Canadian  Abraxas are in good  standing or  subsisting in such
jurisdiction  and listing all charter  documents  of Abraxas,  Sub and  Canadian
Abraxas  on  file;  (c) a  certificate  from  the  Secretary  of  State or other
appropriate  official in each state in which Abraxas and Sub are qualified to do
business to the effect that Abraxas and Sub are in good  standing in such state;
and (d)  certificates as to the tax status of Abraxas,  Sub and Canadian Abraxas
in their  respective  jurisdictions  of  incorporation  and each  state in which
Abraxas, Sub and Canadian Abraxas are qualified to do business.

         Section 7.10 Performance of Agreements.  Each and all of the agreements
of Abraxas and its officers and  directors  and Sub to be performed on or before
the Closing Date pursuant to the terms hereof or the Agreements  shall have been
duly  performed  in all  material  respects,  and  Abraxas  and Sub  shall  have
delivered to the Company a certificate, dated the Closing Date, to such effect.

         Section 7.11 Proceedings. All proceedings to be taken by Abraxas or Sub
in  connection  with the  transactions  contemplated  by this  Agreement and all
documents  incident  thereto  shall  be  reasonably  satisfactory  in  form  and
substance  to the Company and its  counsel and the Company  shall have  received
copies  of all such  documents  and other  evidences  as it or its  counsel  may
reasonably  request in order to establish the consummation of such  transactions
and the taking of all proceedings in connection therewith.

         Section 7.12  Effectiveness of S-4 Registration  Statement.  Subject to
Section 2.03 of this Agreement, the S-4 Registration Statement shall have become
effective and no stop order  suspending  the  effectiveness  thereof shall be in
effect and no proceedings for such purpose shall be pending or threatened before
the Commission.

         Section 7.13 Stockholder  Approval. If required by law or the rules and
regulations  of the  Nasdaq  National  Market  (without  reliance  on the  19.9%
Alternative),  this Agreement shall have been duly approved by the  stockholders

                                       47
                                    ANNEX I
<PAGE>

of Abraxas in accordance with applicable law.

         Section  7.14  Opinion of  Company's  Counsel.  The Company  shall have
received a favorable  opinion  dated the Closing Date of King & Spalding in form
and  substance  reasonably  satisfactory  to the Company that the Merger will be
treated as a tax-free  reorganization  pursuant to Section 368(a) of the Code as
supported  by  customary  certificates  required to be  delivered by the parties
hereto.

         Section 7.15 Director  Approval.  The Board of Directors of Abraxas and
Sub shall have  recommended  and voted in favor of adoption and approval of this
Agreement.

         Section  7.16 NASDAQ  Listing.  The Abraxas  Shares to be issued at the
Effective Time and on the Provisional  Payment Date shall have been approved for
listing on the Nasdaq National Market subject to official notice of issuance.

         Section 7.17 Waivers and Consents.  Abraxas shall have obtained waivers
and consents under the Amended and Restated Credit  Agreement with Bankers Trust
to permit consummation of the transactions contemplated by this Agreement.


                                  ARTICLE VIII

                      SURVIVAL OF REPRESENTATIONS; RECOVERY

         Section 8.01 Survival of Representations.  Except as otherwise provided
in  the  Escrow  Agreement,  the  representations,   warranties,  covenants  and
agreements of the Company, Abraxas and Sub set forth in this Agreement shall not
survive the Merger  contemplated  hereby and shall expire at the Effective Time;
provided,  however,  that the  covenants of Abraxas set forth in Sections  1.04,
1.05,  1.13(b),  2.02,  5.01 5.05,  5.08,  5.09,  5.11,  5.12, 5.13 and Schedule
1.04(e)(iv)  shall  survive the Merger  contemplated  hereby.  In the absence of
fraud,  Abraxas,  the Company  and Sub  covenant  and agree never to  institute,
directly  or   indirectly,   any  action  or  proceeding   against  the  Vessels
Stockholders  based upon or  arising  out of or in any  manner  related  to, the
breach of a representation,  warranty,  covenant or agreement  contained in this
Agreement except as set forth in the Escrow Agreement.

         Section 8.02 Claims.  Abraxas'  sole and  exclusive  remedy shall be to
recover  from the Escrow  Shares any damages,  losses,  costs,  liabilities  and
expenses suffered or paid,  directly or indirectly,  through  application of the
assets of Abraxas, any of its subsidiaries, the Company, or its Subsidiaries, as
a result of any and all claims, demands,  suits, causes of action,  proceedings,
judgments  and  liabilities,  including  reasonable  counsel  fees  incurred  in
litigation or otherwise,  assessed, incurred or sustained by or against Abraxas,
any of its  subsidiaries,  the Company or the  Subsidiaries but only pursuant to
and in accordance with the terms of the Escrow Agreement.

                                       48
                                    ANNEX I
<PAGE>

                                   ARTICLE IX

                                     CLOSING

         Section 9.01  Deliveries  at the  Closing.  Immediately  following  the
satisfaction  of the  conditions  set forth in Articles  VI and VII hereof,  the
Company and Sub shall cause a  Certificate  of Merger to be filed in  accordance
with the  provisions of the Delaware  Statute,  and shall take any and all other
lawful  actions and do any and all other  lawful  things  necessary to cause the
Merger to become effective.

         Section  9.02 Time and  Place.  The  consummation  of the  transactions
contemplated by this Agreement (the  "Closing")  shall take place at the offices
of Cox & Smith  Incorporated,  112 East Pecan Street,  Suite 1800,  San Antonio,
Texas 78205, as soon as reasonably practicable after such time as the conditions
set forth in Articles VI and VII shall have been satisfied or waived, or at such
other place or at such other time as may be mutually  agreed upon by Abraxas and
the Company.


                                    ARTICLE X

                                  MISCELLANEOUS

         Section 10.01 Knowledge. Where any representation or warranty contained
in  this  Agreement  is  expressly  qualified  by  reference  to the  knowledge,
information and/or belief of the Company,  Sub or Abraxas,  each of the Company,
Sub or  Abraxas  confirms  that he or it,  as the case may be,  has made due and
diligent inquiry as to the matters that are the subject of such  representations
and warranties.

         Section 10.02  Expenses.  The parties hereto shall pay all of their own
expenses relating to the transactions contemplated by this Agreement, including,
without  limitation,  the fees and  expenses  of their  respective  counsel  and
financial  advisers and engineers.  Abraxas and Vessels shall split the fees and
expenses,  if any, related to the engagement of Ryder Scott Petroleum  Engineers
pursuant to Section 1.04(a).

         Section 10.03  Governing Law. The  interpretation  and  construction of
this Agreement,  and all matters relating hereto,  shall be governed by the laws
of the State of Delaware  without  regard to the  principles or conflicts of law
applicable thereto.

         Section  10.04  "Person"  Defined.  "Person"  shall mean and include an
individual,  a  partnership,  a  joint  venture,  a  corporation,  a  trust,  an
unincorporated  organization  and a  government  or other  department  or agency
thereof.

                                       49
                                    ANNEX I
<PAGE>

         Section 10.05  Captions.  The Article and Section  captions used herein
are for reference  purposes only, and shall not in any way affect the meaning or
interpretation of this Agreement. All references in this Agreement to an Article
or Section,  when used without further  attribution,  shall refer to Articles or
Sections of this Agreement.

         Section 10.06  Publicity.  Except as otherwise  required by law and the
rules and regulations of the Nasdaq National Market,  none of the parties hereto
shall issue any press release or make any other public  statement,  in each case
relating to or  connected  with or arising out of this  Agreement or the matters
contained  herein,  without  obtaining  the prior  approval  of Abraxas  and the
Company to the contents and the manner of presentation and publication thereof.

         Section 10.07 Notices. Any notice or other  communications  required or
permitted  hereunder shall be sufficiently  given if delivered in person or sent
by overnight  courier or by  registered  or  certified  mail,  postage  prepaid,
addressed as follows or by facsimile transmission to the number set forth below:

         If to the Company:

                  Vessels Energy, Inc.
                  1050 Seventeenth Street, Suite 2000
                  Denver, Colorado  90285
                  Attention:  W. Michael Neumann, Jr.
                  Facsimile:  (303) 825-2532

         With a copy to:

                  King & Spalding
                  1100 Louisiana, Suite 3300
                  Houston, TX  77002-5219
                  Attention:  Christine LaFollette
                  Facsimile:  (713) 751-3290

         If to Abraxas or Sub:

                  Abraxas Petroleum Corporation
                  500 North Loop 1604 East
                  Suite 100
                  San Antonio, Texas  78232
                  Attention:  Robert L. G. Watson
                  Facsimile:  (210) 490-8816


                                       50
                                    ANNEX I

<PAGE>


         With a copy to:

                  Cox & Smith Incorporated
                  112 East Pecan Street, Suite 1800
                  San Antonio, Texas  78205
                  Attention:  Steven R. Jacobs
                  Facsimile:  (210) 226-8395

or such other  address as shall be furnished  in writing by any such party,  and
such notice or  communication  shall be deemed to have been given as of the date
so delivered or mailed.

         Section  10.08  Parties  in  Interest.   This   Agreement  may  not  be
transferred,  assigned,  pledged or hypothecated by any party hereto, other than
by operation of law. This Agreement shall be binding upon and shall inure to the
benefit  of  the  parties  hereto  and  their   respective   heirs,   executors,
administrators,  successors  and  assigns  and shall be for the  benefit  of the
Vessels Stockholders and Indemnified Parties.

         Section 10.09  Counterparts.  This  Agreement may be executed in two or
more counterparts, all of which taken together shall constitute one instrument.

         Section 10.10 Entire  Agreement.  This  Agreement,  including the other
documents  referred  to herein  which form a part  hereof,  contains  the entire
understanding of the parties hereto with respect to the subject matter contained
herein and  therein  and  supersedes  all prior  agreements  and  understandings
between the parties  with  respect to such  subject  matter.  All  exhibits  and
schedules  referred to herein and  attached  hereto are  incorporated  herein by
reference.

         Section 10.11 Amendments. This Agreement may not be changed orally, but
only by an agreement in writing signed by Abraxas, Sub and the Company.

         Section 10.12  Severability.  In case any  provision in this  Agreement
shall be held invalid,  illegal or  unenforceable,  the  validity,  legality and
enforceability  of the  remaining  provisions  hereof  will  not  in any  way be
affected or impaired thereby.

         Section 10.13 Third Party Beneficiaries. Each party hereto intends that
this Agreement shall not benefit or create any right or cause of action in or on
behalf of any person other than the parties hereto, the Vessels Stockholders and
Indemnified Parties.

         Section  10.14  Termination  of  Agreement.   Notwithstanding  anything
contained in this  Agreement to the contrary,  this  Agreement may be terminated
and abandoned only in the following manner:

         (a) by the mutual written  consent of the Board of Directors of Abraxas
and the Company at any time prior to the Closing; or

                                       51
                                    ANNEX I
<PAGE>

         (b) by  Abraxas,  Sub or the  Company  if the  Closing  shall  not have
occurred on or before February 28, 1998;  provided,  however,  that the right to
terminate this Agreement  under this Section  10.14(b) shall not be available to
any party whose failure to fulfill any  obligation,  covenant or condition under
this Agreement has been the cause of, or resulted in, the failure of the Closing
to occur on or before such date; or

         (c) by Abraxas,  Sub or the Company,  at any time prior to the Closing,
if any court of  competent  jurisdiction  in the United  States or other  United
States  governmental body shall have issued an order,  decree or ruling or taken
any  other  action   restraining,   enjoining  or  otherwise   prohibiting   the
consummation of the transactions  contemplated by this Agreement and such order,
decree, ruling or other action shall have become final and nonappealable; or

         (d) By  Abraxas or Sub if any  condition  set forth in Article VI could
not be satisfied on or prior to February  28,  1998,  unless such failure  shall
have been caused by or resulted from the failure of Abraxas or Sub to perform in
any material  respect any  material  covenant or agreement of either of them set
forth in this Agreement or the material breach by Abraxas or Sub of any material
representation or warranty of either of them set forth in this Agreement; or

         (e) By the Company if any  condition set forth in Article VII could not
be satisfied on or prior to February  28, 1998,  unless such failure  shall have
been  caused by or  resulted  from the  failure of the Company to perform in any
material  respect any  material  covenant or  agreement  of it contained in this
Agreement or the material  breach by the Company of any material  representation
or warranty of it contained in this Agreement; or

         (f) By Abraxas,  Sub or the Company if the  stockholders of the Company
or Abraxas do not approve the Merger at the Meetings; or

         (g) By the Company if the  executive  officers and directors of Abraxas
shall have breached the Voting Agreements.

         Section  10.15  Procedure  for   Termination.   In  the  event  of  the
termination of this Agreement and abandonment of the  transactions  contemplated
hereby by any or all of the parties  pursuant to Section 10.15  hereof,  written
notice  thereof  shall  forthwith  be given to the other  party  specifying  the
provision  hereof pursuant to which such  termination is made and this Agreement
and the transactions  contemplated by this Agreement shall be abandoned and, all
obligations  except for the provisions of the third sentence of Section 5.03 and
Sections  5.07  and  10.16,  this  Agreement  and the  Voting  Agreements  shall
forthwith  become void and have no effect,  without any liability on the part of
any party or its respective directors,  officers, employees, agents, consultants
or stockholders. If this Agreement is terminated as provided herein:

         (a) Each party shall  redeliver or destroy all  documents,  work papers
and other materials of the other party relating to the transactions contemplated
hereby, whether so obtained before or after the execution of this Agreement,  to

                                       52
                                    ANNEX I
<PAGE>

the party furnishing the same; and

         (b) All  information  received by any party  hereto with respect to the
business of the other party (other than information  which is a matter of public
knowledge  or  which  has  heretofore  been  or is  hereafter  published  in any
publication  for public  distribution  or filed as public  information  with any
governmental  authority)  shall not at any time be used for the advantage of, or
disclosed  to third  parties  by,  such  party  to the  detriment  of the  party
furnishing such information.

         Section 10.16 Fees.

         (a) In recognition of the significant expenditure of executive time and
resources incurred by Abraxas and Sub in connection with the negotiation of this
Agreement and  investigation of the  transactions  contemplated  hereby,  and in
light of the  difficulty in  calculating  the value of such  executive  time and
resources,  upon the termination of this Agreement by Abraxas or Sub pursuant to
Section  10.14(d),  the  Company  shall  pay to  Abraxas  $1,500,000;  provided,
however,  the Company  shall not be obligated to pay the fee required to be paid
pursuant to this Section 10.16(a) if Abraxas and Sub terminate this Agreement on
account of any of the  conditions  set forth in  Sections  6.01 (but only to the
extent the opinion  cannot  substantively  legally be given),  6.12 and 6.14 not
having been  satisfied or if Abraxas and Sub terminate this Agreement on account
of the failure to receive, pursuant to Section 6.07, approvals for which Abraxas
has  responsibility,  approvals  typically  received  after  consummation  of  a
transaction  similar  to the  Merger or  approvals  the  failure  of which to be
obtained would not have a Material Adverse Effect;  provided  further,  that the
Company  shall not be obligated  to pay the fee required to be paid  pursuant to
this  Section  10.16(a)  if (i)  Abraxas  and Sub shall not have  satisfied  all
conditions  precedent  to the Closing set forth in Article VII as of the date of
termination,  other than the  conditions set forth in Sections 7.01 (but only to
the extent the opinion cannot substantively legally be given) and 7.13, (ii) the
executive  officers and  directors  of Abraxas  shall not have  satisfied  their
obligations  under the Voting  Agreements  or (iii) Abraxas shall have taken any
action intended or reasonably calculated to prevent the Closing.

         (b) In recognition of the significant expenditure of executive time and
resources  incurred by the Company in connection  with the  negotiation  of this
Agreement and  investigation of the  transactions  contemplated  hereby,  and in
light of the  difficulty in  calculating  the value of such  executive  time and
resources,  if this  Agreement is terminated by the Company  pursuant to Section
10.14(e) or (g) Abraxas shall pay to the Company $1,500,000;  provided,  however
Abraxas  shall not be  obligated  to pay such sum to the  Company if the Company
terminates  this  Agreement  on  account of any of the  conditions  set forth in
Sections 7.01 (but only to the extent the opinion cannot  substantively  legally
be given) and 7.13 not having  been  satisfied  or if  Vessels  terminates  this
Agreement  on  account of the  failure to  receive,  pursuant  to Section  7.03,
approvals for which Vessels has  responsibility,  approvals  typically  received

                                       53
                                    ANNEX I
<PAGE>

after  consummation  of a  transaction  similar to the Merger or  approvals  the
failure of which to be obtained would not have a material  adverse effect on the
business,  results of  operations,  or  condition,  financial or  otherwise,  of
Abraxas;  provided  further,  that Abraxas shall not be obligated to pay the fee
required to be paid  pursuant to this Section  10.16(b) if (i) Vessels shall not
have satisfied all  conditions  precedent to the Closing set forth in Article VI
as of the date of  termination,  other than the conditions set forth in Sections
6.01 (but only to the extent the opinion cannot substantively legally be given),
6.12 and 6.14 or (ii) Vessels shall have taken any action intended or reasonably
calculated to prevent the Closing.

         (c) Payment of the fee referred to in this Section  10.16 shall be made
not later than two business  days after  termination  of this  Agreement by wire
transfer of immediately  available  funds to an account  designated by the party
entitled to receive payment.

         Section  10.17  Schedules.  The  disclosure  made in any Schedule  with
respect  to any  representation  and  warranty  shall be  deemed to be made with
respect to any other  representation  and  warranty  which  requires the same or
similar  disclosure to the extent that the subject matter of such  disclosure to
one representation and warranty applies to another representation and warranty.

         Section 10.18  CONSPICUOUS  DISCLAIMERS.  THE PARTIES AGREE THAT TO THE
EXTENT REQUIRED TO BE OPERATIVE, THE DISCLAIMERS OF CERTAIN WARRANTIES AND OTHER
MATTERS  CONTAINED  IN THIS  AGREEMENT  ARE  "CONSPICUOUS"  DISCLAIMERS  FOR THE
PURPOSES OF ANY APPLICABLE LAW, RULE OR ORDER.


                                       54
                                    ANNEX I

<PAGE>


         IN WITNESS  WHEREOF,  Abraxas,  Sub, and the Company have executed this
Agreement to be effective as of the day and year first above written.

                                 ABRAXAS PETROLEUM CORPORATION


                                 By:      /s/ Chris E. Williford
                                          Chris E. Williford
                                          Executive Vice President,
                                          Chief Financial Officer and Treasurer


                                 VEI ACQUISITION CORP.


                                 By:      /s/ Chris E. Williford
                                          Chris E. Williford, Vice President


                                 VESSELS ENERGY, INC.


                                 By:      /s/ W. Michael Neumann, Jr.
                                          W. Michael Neumann, Jr., President


                                       55
                                    ANNEX I
<PAGE>


                                  DEFINED TERMS

         "AEM" shall have the meaning set forth in Section 6.15.

         "Abraxas"  or  "Purchaser"  shall  have the  meaning  set  forth in the
         Introduction.

         "Abraxas  Common  Stock"  shall have the  meaning  set forth in Section
         1.01(b).

         "Abraxas  Interests"  shall  have the  meaning  set  forth  in  Section
         4.15(b).

         "Abraxas Leases" shall have the meaning set forth in Section 4.15(b).

         "Abraxas Meeting" shall have the meaning set forth in Section 2.01.

         "Abraxas  Reserve  Report"  shall have the meaning set forth in Section
         4.14.

         "Abraxas  Well" or "Abraxas  Wells" shall have the meaning set forth in
         Section 4.15(a).

         "1934 Act" shall have the meaning set forth in Section 3.26.

         "Affiliate Agreement" shall have the meaning set forth in Section 5.06.

         "Agreement" shall have the meaning set forth in the Introduction.

         "Applicable Laws" shall have the meaning set forth in Section 3.22.

         "Appraisal Shares" shall have the meaning set forth in Section 1.07.

         "Average PV-10" shall have the meaning set forth in Section 1.04(a).

         "Balance Sheet Date" shall have the meaning set forth in Section 3.05.

         "Bank" shall have the meaning set forth in Section 6.17.

         "COBRA" shall have the meaning set forth in Section 3.25(h).

         "Canadian Abraxas" shall have the meaning set forth in Section 4.03.

         "Certificate  of Merger"  shall have the  meaning  set forth in Section
         1.02.

         "Chase" shall have the meaning set forth in Section 6.15.

         "Claim" shall have the meaning set forth in Section 5.12(a).

                                       56
                                    ANNEX I
<PAGE>

         "Closing" shall have the meaning set forth in Section 9.02.

         "Code" shall have the meaning set forth in Section 3.25(b).

         "Commission" shall have the meaning set forth in Section 2.02.

         "Costs" shall have the meaning set forth in Section 5.12(a).

         "Current Premium" shall have the meaning set forth in Section 5.12(e).

         "D&M" shall have the meaning set forth in Section 1.04(a).

         "D&O Insurance" shall have the meaning set forth in Section 5.12(e).

         "Delaware Statute" shall have the meaning set forth in Section 1.01(a).

         "Drilling Costs" shall have the meaning set forth in Section 1.04(e).

         "ERISA" shall have the meaning set forth in Section 3.25(c).

         "Effective Time" shall have the meaning set forth in Section 1.02.

         "Enforceability  Exception" shall have the meaning set forth in Section
         3.03.

         "Enron Agent" shall have the meaning set forth in Section 5.10.

         "Enron Contract" shall have the meaning set forth in Section 1.04(e).

         "Escrow Agreement" shall have the meaning set forth in Section 1.09.

         "Escrow Shares" shall have the meaning set forth in Section 1.09.

         "Exchange Agent" shall have the meaning set forth in Section 1.05(a).

         "FERC" shall have the meaning set forth in Section 3.11.

         "Financial  Statements"  shall  have the  meaning  set forth in Section
         3.05.

         "Hedges  Present  Value"  shall have the  meaning  set forth in Section
         1.04(e).

         "Indemnified  Parties"  shall  have the  meaning  set forth in  Section
         5.12(a).

         "Independent  Accountant"  shall have the  meaning set forth in Section
         1.13.

         "Independent  Calculation"  shall have the meaning set forth in Section
         1.04(a).

                                       57
                                    ANNEX I
<PAGE>

         "IRS" shall have the meaning set forth in Section 3.25(b).

         "Land" shall have the meaning set forth in Section 3.10.

         "Leases" shall have the meaning set forth in Section 3.10.

         "Letter Agreement" shall have the meaning set forth in Section 1.12.

         "Liabilities" shall have the meaning set forth in Section 1.04(e).

         "Merger" shall have the meaning set forth in Section 1.01(a).

         "NARCO  Downstream  Agreements"  shall  have the  meaning  set forth in
         Section 1.04(e).

         "NARCO Interests" shall have the meaning set forth in Section 3.11.

         "NARCO Leases" shall have the meaning set forth in Section 3.11.

         "NARCO Properties" shall have the meaning set forth in Section 3.11.

         "NARCO Upstream  Agreements shall have the meaning set forth in Section
         1.04(e).

         "NARCO Wells" shall have the meaning set forth in Section 3.11.

         "NSA" shall have the meaning set forth in Section 1.04(a).

         "Nevada Statute" shall have the meaning set forth in Section 2.01.

         "Non-Producing  Mineral Fee Interests" shall have the meaning set forth
         in Section 3.10.

         "PCBs" shall have the meaning set forth in Section 3.31(d).

         "PDNP" shall have the meaning set forth in Section 1.04(e).

         "PDP" shall have the meaning set forth in Section 1.04(e).

         "Permits" shall have the meaning set forth in Section 3.11.

         "Permitted  Encumbrances"  shall have the  meaning set forth in Section
         1.04(e).

         "Provisional  Payment Date" shall have the meaning set forth in Section
         1.04(b).

                                       58
                                    ANNEX I
<PAGE>

         "Purchaser  Certificates"  shall have the  meaning set forth in Section
         1.05(a).

         "Registration  Rights  Agreements"  shall have the meaning set forth in
         Section 1.11.

         "Related Agreements" shall have the meaning set forth in Section 3.03.

         "S-4  Registration  Statement"  shall  have the  meaning  set  forth in
         Section 2.02.

         "SEC Reports" shall have the meaning set forth in Section 4.11.

         "Securities Act" shall have the meaning set forth in Section 2.02.

         "Staff" shall have the meaning set forth in Section 2.02.

         "Stock"  or  "Shares"  shall  have the  meaning  set  forth in  Section
         1.01(a).

         "Sub" shall have the meaning set forth in the Introduction.

         "Subsidiaries" shall have the meaning set forth in Section 3.04.

         "Transferred  Employee"  shall  have the  meaning  set forth in Section
         5.11(b).

         "Uncompleted  Wells"  shall  have the  meaning  set  forth  in  Section
         1.04(e).

         "Vessels"  or  "Company"  shall  have  the  meaning  set  forth  in the
         Introduction.

         "Vessels Agreements" shall have the meaning set forth in Section 3.10.

         "Vessels  Material  Contracts"  shall  have the  meaning  set  forth in
         Section 3.16.

         "Vessels Meeting" shall have the meaning set forth in Section 2.01.

         "Vessels  Stock  Certificates"  shall  have the  meaning  set  forth in
         Section 1.04(c).

         "Vessels Stockholder" or "Vessels  Stockholders" shall have the meaning
         set forth in Section 3.02.

         "Voting Agreement" shall have the meaning set forth in Section 1.10.

         "Watson Voting  Agreement"  shall have the meaning set forth in Section
         1.10.

         "Well" or "Wells" shall have the meaning set forth in Section 3.10.

         "Working  Capital  Contribution"  shall have the  meaning  set forth in
         Section 1.13.

                                       59
                                    ANNEX I
<PAGE>



               SECTION 262 OF THE DELAWARE GENERAL CORPORATION LAW

ss. 262.     Appraisal Rights

         (a) Any  stockholder of a corporation of this State who holds shares of
stock on the date of the making of a demand  pursuant to subsection  (d) of this
section with respect to such shares,  who continuously holds such shares through
the effective date of the merger or  consolidation,  who has otherwise  complied
with  subsection  (d) of this section and who has neither  voted in favor of the
merger or consolidation  nor consented  thereto in writing pursuant to ss.228 of
this title  shall be entitled  to an  appraisal  by the Court of Chancery of the
fair  value  of the  stockholder's  shares  of  stock  under  the  circumstances
described in subsections  (b) and (c) of this section.  As used in this section,
the word "stockholder"  means a holder of record of stock in a stock corporation
and also a member of record of a nonstock  corporation;  the words  "stock"  and
"share"  mean and  include  what is  ordinarily  meant by those  words  and also
membership or membership interest of a member of a nonstock corporation; and the
words  "depository  receipt"  means a receipt  or other  instrument  issued by a
depository representing an interest in one or more shares, or fractions thereof,
solely of stock of a corporation, which stock is deposited with the depository.

         (b) Appraisal  rights shall be available for the shares of any class or
series of stock of a constituent  corporation in a merger or consolidation to be
effected  pursuant to ss.251 (other than a merger effected pursuant to ss.251 of
this title, ss.252, ss.254, ss.257, ss.258, ss.263 or ss.264 of this title:

                  (1)  Provided,  however,  that no appraisal  rights under this
section shall be available for the shares of any class or series of stock, which
stock, or depository  receipts in respect  thereof,  at the record date fixed to
determine  the  stockholders  entitled  to receive  notice of and to vote at the
meeting of  stockholders  to act upon the agreement of merger or  consolidation,
were  either (i) listed on a national  securities  exchange or  designated  as a
national  market  system  security  on an  interdealer  quotation  system by the
National Association of Securities Dealers,  Inc. or (ii) held of record by more
than 2,000  holders;  and further  provided  that no  appraisal  rights shall be
available  for any shares of stock of the  constituent  corporation  surviving a
merger  if the  merger  did  not  require  for  its  approval  the  vote  of the
stockholders  of the  surviving  corporation  as provided in  subsection  (f) of
ss.251 of this title.

                  (2)   Notwithstanding   paragraph  (1)  of  this   subsection,
appraisal  rights  under this section  shall be available  for the shares of any
class or series of stock of a constituent corporation if the holders thereof are
required by the terms of an  agreement  of merger or  consolidation  pursuant to
ss.ss.251,  252,  254,  257,  258,  263 and 264 of this title to accept for such
stock anything except:

                           a. Shares of stock of the  corporation  surviving  or
resulting from such merger or consolidation,  or depository  receipts in respect
thereof;

                           b.  Shares  of stock  of any  other  corporation,  or
depository  receipts in respect  thereof,  which  shares of stock or  depository
receipts at the  effective  date of the merger or  consolidation  will be either
listed on a national  securities  exchange or  designated  as a national  market
system security on an interdealer  quotation system by the National  Association
of Securities Dealers, Inc. or held of record by more than 2,000 holders;

                           c. Cash in lieu of  fractional  shares or  fractional
depository  receipts described in the foregoing  subparagraphs a. and b. of this
paragraph; or

                           d. any combination of the shares of stock, depository
receipts and cash in lieu of fractional shares or fractional depository receipts
described in the foregoing subparagraphs a., b. and c. of this paragraph.

                                       1
                                    ANNEX II
<PAGE>

                  (3) In the  event all of the  stock of a  subsidiary  Delaware
corporation  party to a merger  effected under ss.253 of this title is not owned
by the parent  corporation  immediately  prior to the merger,  appraisal  rights
shall be available for the shares of the subsidiary Delaware corporation.

         (c) Any  corporation  may provide in its  certificate of  incorporation
that  appraisal  rights under this section  shall be available for the shares of
any class or series of its stock as a result of an amendment to its  certificate
of  incorporation,  any merger or  consolidation  in which the  corporation is a
constituent corporation or the sale of all or substantially all of the assets of
the corporation.  If the certificate of incorporation contains such a provision,
the procedures of this section, including those set forth in subsections (d) and
(e) of this section, shall apply as nearly as is practicable.

         (d) Appraisal rights shall be perfected as follows:

                  (1) If a proposed merger or consolidation  for which appraisal
rights are  provided  under this  section is to be  submitted  for approval at a
meeting of  stockholders,  the  corporation,  not less than 20 days prior to the
meeting,  shall notify each of its  stockholders who was such on the record date
for such meeting with respect to shares for which appraisal rights are available
pursuant to subsections  (b) or (c) hereof that  appraisal  rights are available
for any or all of the shares of the constituent corporations,  and shall include
in such notice a copy of this section.  Each stockholder  electing to demand the
appraisal of his shares shall deliver to the  corporation,  before the taking of
the vote on the merger or  consolidation,  a written demand for appraisal of his
shares.  Such demand will be sufficient if it reasonably informs the corporation
of the identity of the stockholder  and that the stockholder  intends thereby to
demand  the  appraisal  of his  shares.  A proxy or vote  against  the merger or
consolidation shall not constitute such a demand. A stockholder electing to take
such action must do so by a separate written demand as herein  provided.  Within
10 days after the effective date of such merger or consolidation,  the surviving
or resulting  corporation  shall  notify each  stockholder  of each  constituent
corporation  who has complied with this subsection and has not voted in favor of
or  consented  to the  merger or  consolidation  of the date that the  merger or
consolidation has become effective; or

                  (2) If the merger or  consolidation  was approved  pursuant to
ss.228 or ss.253 of this title, each constituent corporation,  either before the
effective  date of the merger or  consolidation  or within ten days  thereafter,
shall  notify  each of the  holders  of any  class  or  series  of stock of such
constituent  corporation who are entitled to appraisal rights of the approval of
the merger or  consolidation  and that appraisal rights are available for any or
all shares of such class or series of stock of such constituent corporation, and
shall  include in such  notice a copy of this  section;  provided  that,  if the
notice is given on or after the effective  date of the merger or  consolidation,
such notice shall be given by the surviving or resulting corporation to all such
holders of any class or series of stock of a  constituent  corporation  that are
entitled to  appraisal  rights.  Such notice may,  and, if given on or after the
effective  date  of  the  merger  or  consolidation,  shall,  also  notify  such
stockholders  of  the  effective  date  of  the  merger  or  consolidation.  Any
stockholder  entitled to appraisal  rights may, within 20 days after the date of
mailing  of such  notice,  demand in writing  from the  surviving  or  resulting
corporation  the  appraisal  of  such  holder's  shares.  Such  demand  will  be
sufficient  if it  reasonably  informs the  corporation  of the  identify of the
stockholder and that the stockholder  intends thereby to demand the appraisal of
such  holder's  shares.  If such  notice  did  not  notify  stockholders  of the
effective date of the merger or consolidation,  either (i) each such constituent
corporation  shall send a second notice before the effective  date of the merger
or  consolidation  notifying each of the holders of any class or series of stock
of such  constituent  corporation  that are entitled to appraisal  rights of the
effective date of the merger or consolidation or (ii) the surviving or resulting
corporation  shall send such a second notice to all such holders on or within 10
days after such effective date; provided, however, that if such second notice is
sent more than 20 days  following the sending of the first  notice,  such second
notice need only be sent to each stockholder who is entitled to appraisal rights
and who has demanded  appraisal of such holder's  shares in accordance with this
subsection.  An  affidavit of the  secretary  or  assistant  secretary or of the
transfer  agent of the  corporation  that is required to give either notice that
such  notice has been given  shall,  in the  absence  of fraud,  be prima  facie
evidence  of  the  facts  stated  therein.   For  purposes  of  determining  the
stockholders entitled to receive either notice, each constituent corporation may
fix, in advance,  a record date that shall be not more than 10 days prior to the
date the notice is given;  provided that, if the notice is given on or after the
effective  date of the merger or  consolidation,  the record  date shall be such

                                       2
                                    ANNEX II
<PAGE>

effective  date. If no record date is fixed and the notice is given prior to the
effective  date,  the record date shall be the close of business on the day next
preceding the day on which the notice is given.

         (e)  Within  120  days  after  the  effective  date  of the  merger  or
consolidation, the surviving or resulting corporation or any stockholder who has
complied with  subsections  (a) and (d) hereof and who is otherwise  entitled to
appraisal  rights,  may file a petition  in the Court of  Chancery  demanding  a
determination   of  the   value  of  the   stock   of  all  such   stockholders.
Notwithstanding  the  foregoing,  at any time within 60 days after the effective
date of the merger or  consolidation,  any  stockholder  shall have the right to
withdraw  his demand for  appraisal  and to accept  the terms  offered  upon the
merger or consolidation.  Within 120 days after the effective date of the merger
or  consolidation,  any  stockholder  who has complied with the  requirements of
subsections  (a) and (d)  hereof,  upon  written  request,  shall be entitled to
receive  from  the  corporation  surviving  the  merger  or  resulting  from the
consolidation a statement setting forth the aggregate number of shares not voted
in favor of the merger or  consolidation  and with respect to which  demands for
appraisal have been received and the aggregate number of holders of such shares.
Such written  statement shall be mailed to the stockholder  within 10 days after
his  written  request  for such a statement  is  received  by the  surviving  or
resulting  corporation  or within 10 days  after  expiration  of the  period for
delivery of demands for  appraisal  under  subsection  (d) hereof,  whichever is
later.

         (f) Upon the filing of any such petition by a stockholder, service of a
copy thereof  shall be made upon the surviving or resulting  corporation,  which
shall  within 20 days after such  service  file in the office of the Register in
Chancery in which the petition was filed a duly  verified  list  containing  the
names and  addresses of all  stockholders  who have  demanded  payment for their
shares and with whom  agreements  as to the value of their  shares have not been
reached by the  surviving or  resulting  corporation.  If the petition  shall be
filed  by  the  surviving  or  resulting  corporation,  the  petition  shall  be
accompanied  by such a duly  verified  list.  The  Register in  Chancery,  if so
ordered by the  Court,  shall  give  notice of the time and place  fixed for the
hearing of such  petition by  registered  or certified  mail to the surviving or
resulting corporation and to the stockholders shown on the list at the addresses
therein  stated.  Such notice shall also be given by 1 or more  publications  at
least  1  week  before  the  day of  the  hearing,  in a  newspaper  of  general
circulation published in the City of Wilmington, Delaware or such publication as
the Court deems  advisable.  The forms of the notices by mail and by publication
shall be  approved  by the Court,  and the costs  thereof  shall be borne by the
surviving or resulting corporation.

         (g) At the  hearing on such  petition,  the Court shall  determine  the
stockholders who have complied with this section and who have become entitled to
appraisal  rights.  The Court may require the  stockholders who have demanded an
appraisal for their shares and who hold stock  represented  by  certificates  to
submit  their  certificates  of stock to the  Register in Chancery  for notation
thereon of the pendency of the  appraisal  proceedings;  and if any  stockholder
fails to comply with such direction, the Court may dismiss the proceedings as to
such stockholder.

         (h) After  determining the stockholders  entitled to an appraisal,  the
Court shall appraise the shares,  determining  their fair value exclusive of any
element of value arising from the accomplishment or expectation of the merger or
consolidation,  together  with a fair rate of interest,  if any, to be paid upon
the amount  determined to be the fair value. In determining such fair value, the
Court shall take into account all relevant factors. In determining the fair rate
of interest, the Court may consider all relevant factors,  including the rate of
interest which the surviving or resulting  corporation  would have had to pay to
borrow money  during the pendency of the  proceeding.  Upon  application  by the
surviving or resulting corporation or by any stockholder entitled to participate
in the appraisal proceeding, the Court may, in its discretion,  permit discovery
or other pretrial  proceedings and may proceed to trial upon the appraisal prior
to the final  determination  of the  stockholder  entitled to an appraisal.  Any
stockholder  whose name appears on the list filed by the  surviving or resulting
corporation pursuant to subsection (f) of this section and who has submitted his
certificates  of stock to the  Register in Chancery,  if such is  required,  may
participate fully in all proceedings  until it is finally  determined that he is
not entitled to appraisal rights under this section.

                                       3
                                    ANNEX II
<PAGE>

         (i) The Court shall direct the payment of the fair value of the shares,
together with interest, if any, by the surviving or resulting corporation to the
stockholders entitled thereto.  Interest may be simple or compound, as the Court
may direct.  Payment shall be so made to each such  stockholder,  in the case of
holders of  uncertificated  stock  forthwith,  and the case of holders of shares
represented  by  certificates  upon  the  surrender  to the  corporation  of the
certificates  representing  such stock.  The  Court's  decree may be enforced as
other decrees in the Court of Chancery may be enforced,  whether such  surviving
or resulting corporation be a corporation of this State or of any state.

         (j) The  costs of the  proceeding  may be  determined  by the Court and
taxed upon the parties as the Court deems equitable in the  circumstances.  Upon
application  of a  stockholder,  the Court  may  order  all or a portion  of the
expenses   incurred  by  any   stockholder  in  connection  with  the  appraisal
proceeding,  including,  without limitation,  reasonable attorney's fees and the
fees and  expenses of experts,  to be charged pro rata  against the value of all
the shares entitled to an appraisal.

         (k) From and after the effective  date of the merger or  consolidation,
no stockholder  who has demanded his appraisal  rights as provided in subsection
(d) of this  section  shall be entitled to vote such stock for any purpose or to
receive  payment  of  dividends  or other  distributions  on the  stock  (except
dividends or other  distributions  payable to  stockholders  of record at a date
which is prior to the effective date of the merger or consolidation);  provided,
however,  that if no petition  for an  appraisal  shall be filed within the time
provided in subsection (e) of this section, or if such stockholder shall deliver
to the surviving or resulting corporation a written withdrawal of his demand for
an appraisal and an acceptance of the merger or consolidation,  either within 60
days after the  effective  date of the merger or  consolidation  as  provided in
subsection  (e) of this section or thereafter  with the written  approval of the
corporation,  then the right of such  stockholder  to an appraisal  shall cease.
Notwithstanding the foregoing,  no appraisal proceeding in the Court of Chancery
shall be dismissed as to any stockholder  without the approval of the Court, and
such approval may be conditioned upon such terms as the Court deems just.

         (l) The shares of the surviving or resulting  corporation  to which the
shares  of such  objecting  stockholders  would  have  been  converted  had they
assented to the merger or consolidation  shall have the status of authorized and
unissued shares of the surviving or resulting corporation.


                                       4
                                    ANNEX II
<PAGE>




                                  FORM OF PROXY

                          ABRAXAS PETROLEUM CORPORATION


         THIS PROXY IS  SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF ABRAXAS
PETROLEUM  CORPORATION FOR USE AT THE SPECIAL MEETING OF STOCKHOLDERS TO BE HELD
ON FEBRUARY 13, 1998.

         The undersigned  holder of shares of common stock of Abraxas  Petroleum
Corporation  ("Abraxas") hereby appoints Robert L. G. Watson, Chris E. Williford
and Stephen T. Wendel,  and each of them,  as proxies of the  undersigned,  with
full power of  substitution  and  resubstitution,  to represent  and vote as set
forth  herein all of the shares of common stock of Abraxas held of record by the
undersigned on January 6, 1998 at the Abraxas Special Meeting of Stockholders to
be held on Friday,  February 13, 1998, at 9:00 a.m.,  Central  Standard Time, at
500 North Loop 1604 East,  Suite 100, San Antonio,  Texas 78232,  and at any and
all postponements and adjournments thereof.

         THIS  PROXY,  WHEN  PROPERLY  EXECUTED,  WILL BE  VOTED  IN THE  MANNER
DIRECTED BY THE  UNDERSIGNED  STOCKHOLDER.  IF NO DIRECTION IS  INDICATED,  THIS
PROXY WILL BE VOTED "FOR" THE PROPOSAL TO APPROVE THE MERGER OF A SUBSIDIARY  OF
ABRAXAS WITH AND INTO VESSELS ENERGY, INC. (THE "MERGER") AND THE ISSUANCE OF UP
TO 1,900,000 SHARES OF COMMON STOCK OF ABRAXAS, IN CONNECTION WITH THE MERGER.

           (Continued, and to be dated and signed, on the other side)


<PAGE>





         THE  DIRECTORS  OF ABRAXAS  RECOMMEND A VOTE "FOR" THE  APPROVAL OF THE
MERGER AND THE ISSUANCE OF UP TO 1,900,000 SHARES OF COMMON STOCK OF ABRAXAS.


         Proposal to approve the merger of a subsidiary of Abraxas with and into
Vessels Energy,  Inc. (the "Merger") and the issuance of up to 1,900,000  shares
of Common Stock of Abraxas in connection with the Merger.

         FOR [ ]             AGAINST [ ]                ABSTAIN [ ]



         This proxy  should be dated,  signed by the  stockholder  as his or her
name appears below, and returned promptly in the enclosed envelope. Joint owners
should each sign personally, and trustees and others signing in a representative
capacity should indicate the capacity in which they sign.

Dated:  _______________, 1998.



                                                     Signature of Stockholder


                                                     Signature of Stockholder

PLEASE MARK, SIGN, AND PROMPTLY RETURN THIS PROXY CARD IN THE ENVELOPE PROVIDED.



<PAGE>


                                             
                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 20. Indemnification of Directors and Officers

         Abraxas' Articles of Incorporation  contain a provision that eliminates
the personal  monetary  liability  of directors  and officers to Abraxas and its
stockholders for a breach of fiduciary  duties to the extent  currently  allowed
under the Nevada General  Corporation Law (the "Nevada Statute").  If a director
or officer of Abraxas were to breach his fiduciary  duties,  neither Abraxas nor
its stockholders  could recover monetary damages,  and the only course of action
available  to Abraxas'  stockholders  would be  equitable  remedies,  such as an
action to enjoin or rescind a transaction  involving a breach of fiduciary duty.
To the extent  certain  claims  against  directors  or  officers  are limited to
equitable  remedies,  this provision of Abraxas'  Articles of Incorporation  may
reduce the likelihood of derivative  litigation and may discourage  stockholders
or  management  from  initiating  litigation  against  directors or officers for
breach  of  their  duty of care.  Additionally,  equitable  remedies  may not be
effective in many  situations.  If a stockholder's  only remedy is to enjoin the
completion of the Board of Director's  action,  this remedy would be ineffective
if the stockholder did not become aware of a transaction or event until after it
had been completed.  In such a situation,  it is possible that the  stockholders
and the  Company  would  have no  effective  remedy  against  the  directors  or
officers.

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

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

         Nevada  corporations also are authorized to obtain insurance to protect
officers and directors from certain liabilities,  including  liabilities against
which the  corporation  cannot  indemnify its  directors  and officers.  Abraxas
currently has a directors' and officers'  liability  insurance  policy in effect
providing  $3.0 million in coverage and an  additional  $1.0 million in coverage
for certain employment related claims.

         Abraxas  has  entered  into  indemnity  agreements  with  each  of  its
directors and officers.  These  agreements  provide for  indemnification  to the
extent permitted by the Nevada Statute.

Item 21. Exhibits and Financial Statement Schedules.

*2.1  Agreement  and Plan of Merger,  dated as of November 12, 1997 by and among
Abraxas,  VEI Acquisition Corp. and Vessels Energy, Inc. (included as Annex I to
the Proxy Statement-Prospectus forming a part of this Registration Statement).

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

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

                                      II-1
<PAGE>

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

**3.4  Articles of Amendment to the Articles of  Incorporation  of Abraxas dated
June 8,  1995.  (Filed as Exhibit  3.4 to the  Company's  Form S-3  Registration
Statement No. 333-398 (the "S-3 Registration Statement")).

**3.5 Amended and Restated  Bylaws of Abraxas.  (Filed as Exhibit 3.5 to the S-3
Registration Statement).

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

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

**4.3 Rights  Agreement  dated as of December 6, 1994 between  Abraxas and First
Union  National Bank of North  Carolina  ("FUNB").  (Filed as Exhibit 4.1 to the
Company's Registration Statement on Form 8-A filed on December 6, 1994).

**4.4  Amendment  to Rights  Agreement  dated as of July 14, 1997 by and between
Abraxas  and  American  Stock  Transfer & Trust  Company  (Filed as Exhibit 1 to
Amendment  No. 1 to the  Company's  Registration  Statement on Form 8-A filed on
August 20, 1997).

**4.5  Indenture  dated  November  14,  1996 by and  among the  Company  and IBJ
Schroder Bank and Trust Company.  (Filed as Exhibit 4.1 to the Company's Current
Report on Form 8-K dated November 27, 1996).

**4.6  Form  of  Note.  (Filed  as  Exhibit  4.7 to the  Company's  Registration
Statement on Form S-4 Registration Statement No. 333-18673).

*5.1 Opinion of Cox & Smith Incorporated.

*8.1 Tax Opinion of King & Spalding.

+**10.1 Abraxas Petroleum  Corporation 1984 Non-Qualified  Stock Option Plan, as
amended and restated.  (Filed as Exhibit 10.7 to the Company's  Annual Report on
Form 10-K filed April 14, 1993).

+**10.2  Abraxas  Petroleum  Corporation  1984  Incentive  Stock Option Plan, as
amended and restated.  (Filed as Exhibit 10.8 to the Company's  Annual Report on
Form 10-K filed April 14, 1993).

+**10.3 Abraxas  Petroleum  Corporation 1993 Key Contributor  Stock Option Plan.
(Filed as Exhibit 10.9 to the  Company's  Annual Report on Form 10-K filed April
14, 1993).

+**10.4 Abraxas Petroleum Corporation 401(k) Profit Sharing Plan.

+**10.5 Abraxas Petroleum Corporation Director Stock Option Plan.

+**10.6  Abraxas  Petroleum  Corporation  Restricted  Share Plan for  Directors.
(Filed as Exhibit  10.20 to the  Company's  Annual  Report on Form 10-K filed on
April 12, 1994).

+**10.7 Abraxas  Petroleum  Corporation 1994 Long Term Incentive Plan. (Filed as
Exhibit  10.21 to the  Company's  Annual  Report on Form 10-K filed on April 12,
1994).
    
                                      II-2
<PAGE>

+**10.8 Abraxas Petroleum  Corporation  Incentive Performance Bonus Plan. (Filed
as Exhibit 10.24 to the Company's  Annual Report on Form 10-K filed on April 12,
1994).

**10.9 Registration  Rights and Stock Registration  Agreement dated as of August
11, 1993 by and among  Abraxas,  Endowment  Energy  Partners,  L.P.  ("EEP") and
Endowment Energy Partners II, Limited  Partnership ("EEP II"). (Filed as Exhibit
10.33 to the  Company's  Registration  Statement on Form S-1,  Registration  No.
33-66446 (the "S-1 Registration Statement")).

**10.10 First Amendment to Registration Rights and Stock Registration  Agreement
dated June 30, 1994 by and among Abraxas, EEP and EEP II. (Filed as Exhibit 10.3
to the Registrant's Current Report on Form 8-K filed on July 14, 1994).

**10.11 Second Amendment to Registration Rights and Stock Registration Agreement
dated September 2, 1994 by and among Abraxas,  EEP and EEP II. (Filed as Exhibit
10.3 to the Company's Annual Report on Form 10-K filed March 31, 1995)

**10.12 Third Amendment to Registration Rights and Stock Registration  Agreement
dated November 17, 1995 by and among Abraxas,  EEP and EEP II. (Filed as Exhibit
10.17 to the Company's Annual Report on Form 10-K filed March 31, 1995)

**10.13  Common  Stock  Purchase  Warrant  dated as of December 18, 1991 between
Abraxas and EEP. (Filed as Exhibit 12.3 to the Company's  Current Report on Form
8-K filed January 9, 1992).

**10.14 Common Stock Purchase Warrant dated as of August 1, 1993 between Abraxas
and EEP. (Filed as Exhibit 10.35 to the S-1 Registration Statement).

**10.15 Common Stock Purchase  Warrant dated August 11, 1993 between Abraxas and
EEP II. (Filed as Exhibit 10.36 to the S-1 Registration Statement).

**10.16 Common Stock Purchase  Warrant dated August 11, 1993 between Abraxas and
Associated Energy Managers, Inc. (Filed as Exhibit 10.37 to the S-1 Registration
Statement).

**10.17 Letter dated September 2, 1994 from Abraxas to EEP and EEP II. (Filed as
Exhibit 10.13 to the Company's Annual Report on Form 10-K filed March 31, 1995)

**10.18  Amended and  Restated  Credit  Agreement  dated as of November 14, 1996
among Abraxas,  Bankers Trust Company,  ING (U.S.) Capital  Corporation  and the
Lenders named therein. (Filed as Exhibit 10.5 to the Company's Current Report on
Form 8-K filed November 27, 1996).

**10.19  Warrant  Agreement  dated as of July 27, 1994 between Abraxas and FUNB.
(Filed as Exhibit 10.3 to the Company's  Current Report on Form 8-K filed August
5, 1994).

**10.20  Warrant  Agreement  dated as of December 16, 1994,  between Abraxas and
FUNB.  (Filed as Exhibit 10.23 to the Company's Annual Report on Form 10-K filed
March 31, 1995).

**10.21 First Amendment to Warrant Agreement dated as of August 31, 1995 between
Abraxas and FUNB. (Filed as Exhibit 10.21 to the S-3 Registration Statement).

**10.22 Form of Indemnity  Agreement  between  Abraxas and each of its directors
and officers. (Filed as Exhibit 10.30 to the S-1 Registration Statement).

+**10.23 Employment Agreement between Abraxas and Robert L. G. Watson. (Filed as
Exhibit 10.23 to the S-3 Registration Statement).

                                      II-3
<PAGE>

+**10.24 Employment Agreement between Abraxas and Chris E. Williford.  (Filed as
Exhibit 10.24 to the S-3 Registration Statement).

+**10.25  Employment  Agreement between Abraxas and Robert Patterson.  (Filed as
Exhibit 10.25 to the S-3 Registration Statement).

+**10.26 Employment  Agreement between Abraxas and Stephen T. Wendel.  (Filed as
Exhibit 10.26 to the S-3 Registration Statement).

**10.27  Purchase  Agreement  dated  November  14,  1996 by and  among  Abraxas,
Canadian Abraxas, BT Securities  Corporation,  Jefferies & Company, Inc. and ING
Baring (U.S.) Securities Corporation  (collectively,  the "Initial Purchasers").
(Filed  as  Exhibit  10.1 to the  Company's  Current  Report  on Form 8-K  filed
November 27, 1996).

**10.28  Management  Agreement  dated November 14, 1996 by and between  Canadian
Abraxas  and  Cascade Oil & Gas Ltd.  (Filed as Exhibit  10.36 to the  Company's
Registration Statement on Form S-4 Registration No. 333-18673).

*10.29  First  Amendment to Amended and Restated  Credit  Agreement  dated as of
October  14,  1997 by and  among  Bankers  Trust  Company,  ING  (U.S.)  Capital
Corporation and the Lenders named therein.

*10.30 Vessels Oil & Gas Company Common Stock Purchase  Warrant  Agreement dated
as of  September  12,  1994  between  Vessels  Oil & Gas  Company  and The Chase
Manhattan Bank, N.A.

*10.31 Vessels Oil & Gas Company  Common Stock  Purchase  Warrant dated December
16,  1993  by and  between  Vessels  Oil & Gas  Company  and  Associated  Energy
Managers, Inc.

*10.32 Vessels Oil & Gas Company  Common Stock  Purchase  Warrant dated December
16,  1993  by and  between  Vessels  Oil & Gas  Company  and  Associated  Energy
Managers, Inc.

**11.1 Statement  Regarding  Computation of Per Share Earnings (Filed as Exhibit
11.1 to the Company's Quarterly Report on Form 10-Q filed November 14, 1997).

*21.1 Subsidiaries of Abraxas.

*23.1 Consent of Ernst & Young LLP.

*23.2 Consent of DeGolyer and MacNaughton.

*23.3 Consent of Netherland Sewell and Associates.

*23.4 Consent of King & Spalding (included in Exhibit 8.2).

*23.5 Consent of Cox & Smith Incorporated (included in Exhibit 5.1).

*23.6 Consent of Deloitte & Touche LLP.

*23.7 Consent of KPMG.

*23.8 Consent of Arthur Andersen LLP.

*23.9 Consent of Price Waterhouse LLP.

*23.10 Consent of Robert F. Semmens, nominee for directors.

                                      II-4
<PAGE>

*24.1 Power of Attorney of Franklin Burke.

*24.2 Power of Attorney of Harold D. Carter.

*24.3 Power of Attorney of Robert D. Gershen.

*24.4 Power of Attorney of Richard M. Kleberg, III.

*24.5 Power of Attorney of James C. Phelps.

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

*24.7 Power of Attorney of Richard M. Riggs

*27.1 Financial Data Schedule.


*      Filed herewith.
**     Incorporated by reference to the filing indicated.
+      Management Compensatory Plan or Agreement.

Item 22. Undertakings

         A. The undersigned  registrant hereby undertakes to respond to requests
for information  that is incorporated by reference into the prospectus  pursuant
to Items 4, 10(b), 11, or 13 of this Form, within one business day of receipt of
such  request,  and to send the  incorporated  documents  by first class mail or
other equally  prompt means.  This includes  information  contained in documents
filed subsequent to the effective date of the Registration Statement through the
date of responding to the request.

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

         C. The undersigned registrant hereby undertakes to supply by means of a
post-effective  amendment  all  information  concerning a  transaction,  and the
company  being  acquired  involved  therein,  that  was not the  subject  of and
included in the Registration Statement when it became effective.

         D. The undersigned  registrant hereby undertakes as follows: that prior
to any public reoffering of the securities registered hereunder through use of a
prospectus  which is a part of this  registration  statement,  by any  person or
party who is deemed to be an underwriter  within the meaning of Rule 145(c), the
issuer  undertakes that such reoffering  prospectus will contain the information
called for by the  applicable  registration  form with respect to reofferings by
persons who may be deemed  underwriters,  in addition to the information  called
for by the other Items of the applicable form.

         E. The registrant  undertakes  that every  prospectus (i) that is filed
pursuant to paragraph (D) immediately  preceding,  or (ii) that purports to meet
the  requirements of section  10(a)(3) of the Act and is used in connection with

                                      II-5
<PAGE>

an offering  of  securities  subject to Rule 415,  will be filed as a part of an
amendment  to the  registration  statement  and  will  not be  used  until  such
amendment is  effective,  and that,  for purposes of  determining  any liability
under the Securities Act of 1933,  each such  post-effective  amendment shall be
deemed to be a new  registration  statement  relating to the securities  offered
therein,  and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.

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

         G. The undersigned  registrant hereby undertakes to deliver or cause to
be delivered with the prospectus,  to each person to whom the prospectus is sent
or given,  the latest annual report to security  holders that is incorporated by
reference  in  the  prospectus  and  furnished   pursuant  to  and  meeting  the
requirements  of Rule 14a-3 or Rule 14c-3 under the  Securities  Exchange Act of
1934;  and,  where  interim  financial  information  required to be presented by
Article 3 of Regulation S-X are not set forth in the prospectus,  to deliver, or
cause to be  delivered to each person to whom the  prospectus  is sent or given,
the latest  quarterly  report that is specifically  incorporated by reference in
the prospectus to provide such interim financial information.

                                      II-6
<PAGE>


                                   SIGNATURES

         Pursuant to the  requirements  of the Securities  Act, the  undersigned
registrant  has duly  caused  this  Registration  Statement  to be signed on its
behalf  by the  undersigned,  thereunto  duly  authorized,  in the  City  of San
Antonio, Texas, on January 9, 1998.


                                  ABRAXAS PETROLEUM CORPORATION


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

                                  II-7
<PAGE>


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

         Signature                        Name and Title               Date

/s/ Robert L. G. Watson          Chairman of the Board,          January 9, 1998
- ----------------------------     President, Chief Executive
Robert L.G. Watson               Officer (Principal Executive Officer)
                                 and Director

/s/ Chris E. Williford           Executive Vice President,       January 9, 1998
- ----------------------------     Treasurer, Chief Financial
Chris E. Williford               Officer and Director (Principal
                                 Financial and Accounting Officer)

 *                               Director                        January 9, 1998
- ----------------------------
Franklin Burke

*                                Director                        January 9, 1998
- ----------------------------
Harold D. Carter

*                                Director                        January 9, 1998
- ----------------------------
Robert D. Gershen

*                                Director                        January 9, 1998
- ----------------------------
Richard M. Kleberg, III

 *                               Director                        January 9, 1998
- ----------------------------
James C. Phelps

 *                               Director                        January 9, 1998
- ----------------------------
Paul A. Powell, Jr.

*                                Director                        January 9, 1998
- ----------------------------
Richard M. Riggs

By: /s/ Chris E. Williford
Chris E. Williford
Attorney-in-fact




                                      II-8
<PAGE>
                                 EXHIBIT INDEX


Exhibit Index     Description

5.1               Opinion of Cox & Smith Incorporated.

8.1               Tax Opinion of King & Spalding.

10.29             First Amendment to Amended and Restated Credit Agreement dated
                  as of October 14, 1997 by and among Bankers Trust Company, ING
                  (U.S.) Capital Corporation and the Lenders named therein.

10.30             Vessels  Oil &  Gas  Company  Common  Stock  Purchase  Warrant
                  Agreement dated as of September 12, 1994 between Vessels Oil &
                  Gas Company and The Chase Manhattan Bank, N.A.

10.31             Vessels Oil & Gas Company Common Stock Purchase  Warrant dated
                  December 16, 1993 by and between Vessels Oil & Gas Company and
                  Associated Energy Managers, Inc.

10.32             Vessels Oil & Gas Company Common Stock Purchase  Warrant dated
                  December 16, 1993 by and between Vessels Oil & Gas Company and
                  Associated Energy Managers, Inc.

21.1              Subsidiaries of Abraxas.

23.1              Consent of Ernst & Young LLP.

23.2              Consent of DeGolyer and MacNaughton.

23.3              Consent of Netherland Sewall and Associates.

23.4              Consent of King & Spalding (included in Exhibit 8.2).

23.5              Consent of Cox & Smith Incorporated (included in Exhibit 5.1).

23.6              Consent of Deloitte & Touche LLP.

23.7              Consent of KPMG.

23.8              Consent of Arthur Andersen LLP.

23.9              Consent of Price Waterhouse LLP.

23.10             Consent of Robert F. Semmens, nominee for directors.

24.1              Power of Attorney of Franklin Burke

24.2              Power of Attorney of Harold D. Carter.

24.3              Power of Attorney of Robert D. Gershen.
<PAGE>

24.4              Power of Attorney of Richard M. Kleberg, III.

24.5              Power of Attorney of James C. Phelps.

24.6              Power of Attorney of Paul A. Powell, Jr.

24.7              Power of Attorney of Richard M. Riggs.

27.1              Financial Data Schedule.

<PAGE>

                                                                  EXHIBIT 5.1
                                   COX & SMITH
                             I N C O R P O R A T E D
                              ATTORNEYS COUNSELORS



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



Writer's Direct Number                                  Writer's E-Mail Address
(210) 554-5255                                          [email protected]
                                 January 9, 1998



Abraxas Petroleum Corporation
500 North Loop 1604 East
Suite 100
San Antonio, Texas  78232

                                  Re:    Registration of up to 1,900,000  Shares
                                         of Common  Stock,  par  value  $.01 per
                                         share, of Abraxas Petroleum Corporation

Gentlemen:

         We have acted as counsel to  Abraxas  Petroleum  Corporation,  a Nevada
corporation  ("Abraxas"),  in  connection  with the  issuance of up to 1,900,000
shares (the "Shares") of common stock,  par value $.01 per share,  of Abraxas in
connection  with the  transactions  contemplated  by the  Agreement  and Plan of
Merger,  dated as of November  12, 1997 (the "Merger  Agreement"),  by and among
Abraxas, VEI Acquisition Corp. and Vessels Energy, Inc.

         We have examined such documents,  records and matters of law as we have
deemed necessary for purposes of this opinion.  Based on such examination and on
the  assumptions  set  forth  below,  we are  of  the  opinion  that,  when  the
Registration  Statement  on Form S-4  (the  "Registration  Statement")  filed by
Abraxas to effect  registration  of the Shares under the Securities Act of 1933,
as  amended,  has  been  declared  effective  by  the  Securities  and  Exchange
Commission and the Shares have been issued and delivered in accordance  with the
terms and provisions of the Merger Agreement as contemplated by the Registration
Statement,  the Shares will be duly authorized,  validly issued, fully paid, and
nonassessable.

         In  rendering   this  opinion,   we  have  (i)  assumed  and  have  not
independently verified (a) that each agreement, document, or instrument pursuant
to which any of the  Shares are to be issued  will at the time of such  issuance
have been duly  authorized,  executed,  and delivered by the parties thereto and
will constitute a valid,  binding,  and enforceable  obligation of such parties,
(b) that all signatures on all certificates  and other documents  examined by us
are genuine,  and that, where any such signature purports to have been made in a
<PAGE>

corporate, governmental or other capacity, the person who affixed such signature
to such  certificate  or other  document  had  authority  to do so,  and (c) the
authenticity of all documents submitted to us as originals and the conformity to
original  documents  of all  documents  submitted  to us as  copies,  (ii) as to
certain  factual  matters,  relied upon  certificates  of public  officials  and
Abraxas and its officers and upon the  representations  and warranties set forth
in the Merger  Agreement  and have not  independently  checked or  verified  the
accuracy of the factual statements contained therein, and (iii) assumed that the
parties to the Merger Agreement will comply with the provisions thereof.

         We hereby  consent to the filing of this  opinion as Exhibit 5.1 to the
Registration  Statement  and to the  reference  to us under the  caption  "Legal
Matters"  in  the  Proxy   Statement-Prospectus   constituting  a  part  of  the
Registration Statement. In giving this consent,  however, we do not hereby admit
that we are within the  category  of persons  whose  consent is  required  under
Section  7 of the  Securities  Act of  1933,  as  amended,  and  the  rules  and
regulations of the Securities and Exchange Commission thereunder.

                                                     Yours very truly,

                                                     COX & SMITH INCORPORATED


                                                     By: /s/ Steven R. Jacobs
                                                         Steven R. Jacobs
                                                         For the Firm

SRJ/lrk/0188281.01


<PAGE>






                                                                    EXHIBIT 8.1


                                 January 9, 1998



Vessels Energy, Inc.
1050 Seventeenth Street, Suite 2000
Denver, Colorado 90285


         Re:      Certain Federal Income Tax Consequences of Merger of VEI
                  Acquisition Corp., a Wholly Owned Subsidiary of Abraxas
                  Petroleum Corporation, with and into Vessels Energy, Inc.


Ladies and Gentlemen:

         We  have  acted  as  counsel  to  Vessels  Energy,   Inc.,  a  Delaware
corporation  ("Vessels"),  in connection with the proposed merger (the "Merger")
of VEI  Acquisition  Corp.,  a Delaware  corporation  ("Sub") and a wholly owned
subsidiary of Abraxas Petroleum Corporation,  a Nevada corporation  ("Abraxas"),
with and into Vessels  pursuant to the  Agreement and Plan of Merger dated as of
November  12, 1997 (the  "Merger  Agreement").  You have  requested  our opinion
regarding certain of the federal income tax consequences of the Merger.

         We  understand  that  our  opinion  will be  referred  to in the  Proxy
Statement-Prospectus  of Abraxas (the "Proxy  Statement/Prospectus")  that forms
part of the  Registration  Statement on Form S-4 filed with the  Securities  and
Exchange Commission in connection with the Merger. We hereby consent to such use
of our opinion.

                              INFORMATION RELIED ON

         In rendering  the opinions  expressed  herein,  we have  examined  such
documents as we have deemed appropriate,  including the Merger Agreement and the
Proxy  Statement-Prospectus.  Unless  specified,  capitalized  terms used herein
shall have the meanings assigned to them in the Merger Agreement. All references
herein to the Code are to the United  States  Internal  Revenue Code of 1986, as
amended.

         In our  examination of documents,  we have assumed,  with your consent,
that all  documents  submitted to us as  photocopies  or  telecopies  faithfully
reproduce the originals  thereof,  that such originals are  authentic,  that all
such  documents have been or will be duly executed to the extent  required,  and
<PAGE>

that  all  statements  of fact set  forth in such  documents  are  accurate.  In
addition, we have obtained such additional information and representations as we
have  deemed   relevant  and  necessary   through   consultation   with  various
representatives of Abraxas and Vessels,  including certificates from officers of
Abraxas and Vessels and certain  stockholders  of Vessels  (the  "Certificates")
verifying  certain  relevant  facts  that have been  represented  to us. We have
assumed,  with your consent,  that the statements  contained in the Certificates
are true and correct on the date hereof and will be true and correct at the time
of the Merger, and that any representation made in any of the documents referred
to  herein  "to  the  best  of  the  knowledge  and  belief"  (or  with  similar
qualification)  of any  person  or  party  is  true  and  correct  without  such
qualification.   We  have   not   attempted   independently   to   verify   such
representations.

                                    OPINIONS

         Based upon the foregoing, it is our opinion that:

                    (1) the Merger will constitute a "reorganization" within the
          meaning of Section 368(a) of the Code;

                    (2) no gain  or  loss  will  be  recognized  by the  Vessels
          stockholders  upon the exchange in the Merger of their Vessels  Common
          Stock for Abraxas Common Stock;

                    (3) the  aggregate  tax basis of the  Abraxas  Common  Stock
          received in the Merger by each Vessels stockholder will be the same as
          the aggregate tax basis of the Vessels Common Stock exchanged for such
          Abraxas Common Stock; and

                    (4) the holding  period of the Abraxas Common Stock received
          in the Merger by each  Vessels  stockholder  will  include the holding
          period of such  stockholder in the Vessels Common Stock  exchanged for
          such Abraxas  Common Stock,  provided that the Vessels Common Stock is
          held as a capital asset at the Effective Time.

         The  foregoing  opinions  are limited to the tax  matters  specifically
covered  thereby,  and we have not been  asked to  address  herein,  nor have we
addressed  herein,  any other tax  consequences  of the Merger,  such as the tax
consequences  of the Escrow,  the Contingent  Cash Payment,  and the Provisional
Payment.

         The  opinions  expressed  herein  are based  upon  existing  statutory,
regulatory, and judicial authority, any of which may be changed at any time with
retroactive effect. In addition,  our opinions are based solely on the documents
that we have examined, the additional information that we have obtained, and the
facts set out in the Certificates that we have assumed, with your consent, to be
true and  correct.  Our  opinions  cannot  be  relied  upon if any of the  facts
contained in such documents or in any such  additional  information is, or later
becomes,  inaccurate,  or if any of the facts set out in the Certificates is, or
<PAGE>

later becomes, inaccurate.

         Our  opinions  are  limited to the  United  Stated  federal  income tax
matters specifically covered thereby, and we have not been asked to address, nor
have we addressed, any other tax consequences that may result from the Merger or
any other transaction  (including any transaction  undertaken in connection with
the Merger).  We express no opinion regarding the tax consequences of the Merger
to stockholders who are subject to special tax rules,  such as stockholders,  if
any, who received  their shares upon the exercise of employee  stock  options or
otherwise  as  compensation,  and  stockholders  that are  insurance  companies,
securities dealers, financial institutions or foreign persons.

         This opinion is being  delivered to you solely in  connection  with the
Merger  Agreement.  It may not be relied  upon for any other  purpose  or by any
other  person or entity,  and may not be made  available  to any other person or
entity without our prior written consent.

                                                              Very truly yours,



                                                              KING & SPALDING


[January 8, 1998 (7:08pm)] [2-629033-1]


<PAGE>



                                                                  EXHIBIT 10.29


                               FIRST AMENDMENT TO
                      AMENDED AND RESTATED CREDIT AGREEMENT


                  This First Amendment to Amended and Restated Credit  Agreement
(this  "Amendment")  dated as of October  14,  1997 is among  ABRAXAS  PETROLEUM
CORPORATION,  a Nevada  corporation  (the  "Borrower"),  the banks  named on the
signature pages hereto (together with their respective successors and assigns in
such  capacity,  the  "Banks"),  BANKERS TRUST  COMPANY,  as agent for the Banks
(together with its successors and assigns in such capacity, the "Agent") and ING
(U.S.)  CAPITAL  CORPORATION,  as  co-agent  for the  Banks  (together  with its
successors and assigns in such capacity, the "Co-Agent").

                              PRELIMINARY STATEMENT

                  A. The  Borrower  and the Bank  Group have  entered  into that
certain Amended and Restated Credit Agreement dated as of November 14, 1996 (the
"Credit Agreement").

                  B. The  Borrower and the Bank Group desire to amend the Credit
Agreement as set forth herein.

                  NOW  THEREFORE,  in  consideration  of the  foregoing  and the
mutual agreements set forth herein, the parties agree as follows:

                  Section  1.  Definitions.  Unless  otherwise  defined  in this
Amendment, each capitalized term used in this Amendment has the meaning assigned
to such term in the Credit Agreement.

                  Section 2. Amendments.  The Credit Agreement is hereby amended
as follows:

         a. The second  sentence of Section  2.04(a) of the Credit  Agreement is
hereby amended in its entirety to read as follows:

                  "During the period  from and after  October 14, 1997 until the
         Borrowing Base is  redetermined  in accordance  with this Section,  the
         amount of the Borrowing Base shall be $40,000,000."

         b. Section 5.01(i) of the Credit Agreement is hereby amended
and restated in its entirety to read as follows:

                  "(i) On or before  April 30,  1997,  an  environmental  report
         prepared by an  independent  environmental  firm  approved by the Agent
         covering the real property  owned by the Borrower and its  Subsidiaries
<PAGE>

         (other than the real property  owned by the  Guarantor) in form,  scope
         and substance reasonably satisfactory to the Agent."

         c.  Section  5.10(d)  of the Credit  Agreement  is hereby  amended  and
restated in its entirety to read as follows:

                  "(d) As soon as  available  and in any  event  within  30 days
         after the end of each calendar  quarter  commencing  with September 30,
         1997, the Borrower shall provide the Bank Group production  reports for
         the Borrower's  Oil and Gas  Properties and gas throughput  reports for
         the  Guarantor's gas plants,  in each case,  certified by an officer of
         the  Borrower,  which  reports  shall  include  quantities or volume of
         production or gas  throughput  which have accrued to the  Borrower's or
         the  Guarantors  accounts  (as  applicable)  during  each month in such
         quarter,  and such other  information with respect thereto as the Agent
         may reasonably request."

         d.  Section  6.01(h)  of the Credit  Agreement  is hereby  amended  and
restated in its entirety to read as follows:

                  "(h)  Indebtedness  of the  Guarantor  to the  Borrower  in an
         amount not to exceed  $16,000,000 in principal,  plus accrued  interest
         thereon,  so long as (i) the proceeds of such  Indebtedness are used by
         the Guarantor to acquire approximately an undivided 92% interest in the
         Pacalta Properties, and (ii) such Indebtedness shall be due and payable
         by the  Guarantor  upon the earlier of (A) the sale by the Guarantor of
         its  interest in the Pacalta  Properties  or (B) the  occurrence  of an
         Event of Default under this Agreement."

         e. Section 6.07 of the Credit  Agreement is hereby amended and restated
in its entirety to read as follows:

                  "Section  6.07.  Sales of Assets.  The Borrower  will not, and
         will not permit any of its  Subsidiaries  to, sell,  transfer,  assign,
         farm-out,  lease or  otherwise  transfer or dispose of any assets other
         than (a) sales of  Hydrocarbon  production  in the  ordinary  course of
         business  and sales of obsolete or worn-out  equipment  in the ordinary
         course  of  business,  (b) sales or  transfers  of assets by any of the
         Borrower's wholly-owned  Subsidiaries to the Borrower or any such other
         wholly-owned  Subsidiary,  (c) sale of the Gaelic  Resources Stock, (d)
         any other  sale of assets  sold at fair  market  value,  so long as the
         aggregate Net Proceeds for all such sales made under this subclause (d)
         during any calendar  year does not exceed  $2,000,000,  and (e) sale by
         the Guarantor to Cascade Oil & Gas Ltd. of the Guarantor's  interest in
         the  Pacalta  Properties  for an amount  not less than the  amount  the
         Guarantor paid for its interest in the Pacalta Properties. Upon written
         request of the Borrower  and provided no Event of Default  shall exist,
         the Agent shall release the Lien in favor of the Agent covering  assets
         sold by the Borrower or the  Guarantor,  to the extent (and only to the
         extent) the sale of such assets was  permitted  under  subclause (d) or
         (e) of the preceding sentence."
<PAGE>

         f.  Section  6.09(c)  of the Credit  Agreement  is hereby  amended  and
restated in its entirety to read as follows:

                  "(c)  Capital  Expenditures  by the  Borrower  to develop  its
         Proved Reserves,  Capital Expenditures by any Subsidiary to develop its
         Proved  Reserves,  Capital  Expenditures  by the  Guarantor  to acquire
         approximately an undivided 92% interest in the Pacalta Properties,  and
         additional Capital Expenditures by the Borrower and its Subsidiaries in
         an  amount  not to  exceed  $12,500,000  in the  aggregate  during  any
         six-month  period  commencing  on any October 1 or April 1, as the case
         may be;".

         g.  Section  6.09(g)  of the Credit  Agreement  is hereby  amended  and
restated in its entirety to read as follows:

                  "(g) payments by the Borrower or any  Subsidiary on account of
         Indebtedness  permitted under Section 6.01 and advances or loans by the
         Borrower  or  any  Wholly  Owned  Subsidiary  to  the  Borrower  or its
         Subsidiaries  (as  applicable)  to the  extent  such  advance  or  loan
         constitutes  Indebtedness permitted under Sections 6.01(f),  6.01(g) or
         6.01(h)."

         h. The following  defined term is hereby added to Annex A of the Credit
Agreement to read as follows:

                  "Pacalta  Properties"  means  the Oil and Gas  Properties  and
         other related Property  described as "Assets" in that certain Agreement
         of  Purchase  and Sale,  dated  September  24,  1997,  between  Pacalta
         Resources Ltd., an Alberta, Canada corporation,  as Vendor, and Cascade
         Oil & Gas Ltd. and the Guarantor, as Purchaser."

                  Section 3.  Ratification.  The  Borrower  hereby  ratifies and
confirms all of the Obligations  under the Credit  Agreement (as amended hereby)
and the other Loan Documents and the Liens created under the Security Documents.
All  references in the Loan Documents to the "Credit  Agreement"  shall mean the
Credit Agreement as amended hereby and as the same may be amended, supplemented,
restated or otherwise modified and in effect from time to time in the future.

                  Section 4. Effectiveness.  The effectiveness of this Amendment
is subject to the condition  precedent that the Agent shall have received all of
the following,  each in form and substance  reasonably  satisfactory to the Bank
Group and in such number of counterparts  as may be reasonably  requested by the
Agent:

                  a. this Amendment  executed by the Borrower and each member of
the Bank Group;
<PAGE>

                  b. a supplement to the Existing  Mortgage covering the Oil and
Gas Properties in the East White Point and Stedman Island fields acquired by the
Borrower from Morgan Guaranty Trust Company of New York, as Trustee, on November
1, 1996;

                  c. an amendment to the Guaranty  executed by the  Guarantor in
the form attached hereto as Exhibit A;

                  d. a true and correct copy of the promissory  note executed by
the  Guarantor  that  evidences  the loan from the Borrower to the  Guarantor to
finance the Guarantor's  acquisition of  approximately an undivided 92% interest
in the Pacalta Properties.

                  e.  the  payment  to the  Agent  and  the  Banks  of all  fees
described  in that  certain Fee Letter among the Borrower and the Agent dated of
even date herewith; and

                  f. a certificate of the secretary or an assistant secretary of
the Borrower certifying,  inter alia, (i) true and correct copies of resolutions
adopted by the Board of Directors of the Borrower (A) authorizing the execution,
delivery and  performance  by the Borrower of this  Amendment and the other Loan
Documents  referred to herein to which it is a party, (B) approving the forms of
this Amendment and the other Loan Documents  referred to herein to which it is a
party, and (C) authorizing  officers of the Borrower to execute and deliver this
Amendment and the other Loan Documents referred to herein to which it is or will
be a party,  (ii) true and correct copies of the articles of  incorporation  and
bylaws  (or other  similar  charter  documents)  of the  Borrower  and (iii) the
incumbency and specimen signatures of the officers of the Borrower executing any
documents on behalf of it.

                  Section 5. Representations and Warranties. The Borrower hereby
represents and warrants to the Bank Group that (a) the  execution,  delivery and
performance of this Amendment and the other Loan Documents referred to herein to
which it is a party have been duly authorized by all requisite  corporate action
on the  part of the  Borrower,  (b) each of the  Credit  Agreement  (as  amended
hereby) and the other Loan Documents to which it is a party  constitutes a valid
and legally  binding  agreement  enforceable  against the Borrower in accordance
with its terms  except,  as such  enforceability  may be limited by  bankruptcy,
insolvency,  reorganization,  moratorium,  fraudulent  transfer or other similar
laws relating to or affecting the enforcement of creditors' rights generally and
by general principles of equity, (c) the  representations  and warranties by the
Borrower  contained in the Credit  Agreement as amended  hereby and in the other
Loan Documents are true and correct on and as of the date hereof in all material
respects  as  though  made as of the date  hereof,  (d) no  Default  or Event of
Default  exists  under the Credit  Agreement  (as amended  hereby) or any of the
other Loan Documents.

                  Section 6. Choice of Law. This Amendment shall be governed by,
and construed in accordance with, the laws of the State of New York.

                  Section 7. Final  Agreement.  THE CREDIT AGREEMENT (AS AMENDED
HEREBY) AND THE OTHER LOAN DOCUMENTS  REPRESENT THE FINAL AGREEMENT  BETWEEN THE
PARTIES AND MAY NOT BE  CONTRADICTED  BY EVIDENCE OF PRIOR,  CONTEMPORANEOUS  OR
<PAGE>

SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.  THERE ARE NO ORAL AGREEMENTS BETWEEN
THE PARTIES.

                  Section 8. Counterparts. This Amendment may be executed in any
number of counterparts and by different parties hereto in separate counterparts,
each of which when so  executed  shall be deemed to be an  original,  and all of
which taken together shall constitute one and the same agreement.

                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Amendment to be executed by its officers  thereunto  duly  authorized  as of the
date first above written.

                                          ABRAXAS PETROLEUM CORPORATION


                                          By:
                                          Chris E. Williford
                                          Executive Vice President


                                          BANKERS TRUST COMPANY,
                                          as Agent and Bank


                                          By:
                                          Name:
                                          Title:



                                          ING (U.S.) CAPITAL CORPORATION,
                                          as Co-Agent and Bank


                                          By:
                                          Name:
                                          Title:




<PAGE>


                                          UNION BANK OF CALIFORNIA, N.A.,


                                          By:
                                          Name:
                                          Title:


                                          By:
                                          Name:
                                          Title:



                  The foregoing  First  Amendment to Amended and Restated Credit
Agreement is hereby  acknowledged and agreed to effective as of this 14th day of
October, 1997.


                                         CANADIAN ABRAXAS PETROLEUM
                                         LIMITED



                                         By:
                                         Name:
                                         Title:



<PAGE>



                                                                  EXHIBIT 10.30


                            VESSELS OIL & GAS COMPANY
                     COMMON STOCK PURCHASE WARRANT AGREEMENT


         THIS COMMON STOCK PURCHASE WARRANT AGREEMENT (the "Warrant  Agreement")
dated as of September 12, 1994,  between  Vessels Oil & Gas Company,  a Colorado
corporation and The Chase Manhattan Bank, N.A.  ("Chase" and,  together with any
permitted transferee of Warrants or Warrant Stock, the "Holders(s)").

         WHEREAS,  Chase and the Company have  entered into that certain  Credit
Agreement dated  September 12, 1994 providing for a $5.0 million  unsecured note
(the "Facility"); and

         WHEREAS,   the  Company  proposes  to  issue  to  Chase  as  additional
consideration for Chase's making of loans pursuant to the Facility, common stock
purchase  warrants to purchase shares of the Company's  Common Stock,  par value
$.10 per share (the "Common Stock"), each Warrant initially entitling the holder
thereof to purchase one share of Common Stock.

         NOW,  THEREFORE,  in  consideration  of the  premises  and  the  mutual
agreements  herein  and  in  the  Facility  and  for  other  good  and  valuable
consideration, the parties hereto agree as follows:

                                    Article 1

                                   Definitions

         For  all  purposes  of  this  Warrant  Agreement,  unless  the  context
otherwise requires, the following terms having the following meanings:

         1.1 "Company" means Vessels Oil & Gas Company, a corporation  organized
and  existing  under  the  laws of the  State  of  Colorado,  and any  successor
corporation.

         1.2  "Exercise  Price" shall have the meaning  ascribed to that term in
Section 2.2.

         1.3 "Expiration Date" means September 12, 2004 or, if such day is not a
business day, the first  business day  thereafter,  or such other date as may be
established in accordance with Section 9.2 of this Warrant.

         1.4 "Fair Market Value" in reference to the Common Stock means,  in the
event  such  stock  is  traded  on a  national  securities  exchange  or in  the
over-the-counter  market as reported by the National  Association  of Securities
<PAGE>

Dealers  Automated  Quotation  System  (stock being so traded or reported  being
referred to herein as "Publicly Traded"), the average of the daily market prices
of such stock on the ten (10) trading days immediately  preceding the date as of
which such value is to be determined. The market price for each such trading day
shall be the  average of the closing  prices on such day of the Common  Stock on
all domestic  exchanges  on which the Common Stock is then listed,  or, if there
shall have been no sales on any such  exchange  on such day,  the average of the
highest bid and lowest  asked  prices on all such  exchanges  at the end of such
day,  or,  if the  Common  Stock  shall not be so  listed,  the  average  of the
representative bid and asked prices quoted in the NASDAQ System as of 3:30 P.M.,
New York time,  on such day,  or if the Common  Stock shall not be quoted in the
NASDAQ System,  the average of the high and low bid and asked prices on such day
in the domestic  over-the-counter  market as reported by the National  Quotation
Bureau, Incorporated,  or any similar successor organization. If at any time the
Common  Stock is not  listed on any  domestic  exchange  or quoted in the NASDAQ
System or the domestic over-the-counter market, the "Fair Market Value" shall be
deemed to be the highest of (i) the book value  thereof,  as  determined  by any
firm of independent  public  accountants of recognized  standing selected by the
Board  of  Directors  of  the  Company  (which  may  be  the  Company's  regular
independent accountants),  as at the last day of any month ending within 60 days
preceding the date as of which the  determination is to be made or (ii) the fair
value thereof, which shall be reasonably determined by the Board of Directors of
the Company or a  committee  thereof as of a date which is within 15 days of the
date as of which the determination is to be made. If the Company sells shares of
Common Stock pursuant to a  firm-commitment  underwritten  public  distribution,
Fair Market  Value shall be the actual price per share at which shares are first
offered to the public upon the registration  statement  becoming  effective.  As
applicable  to  Warrants,  Fair Market Value shall mean the Fair Market Value of
the Common  Stock  subject to such  Warrants  minus the  Exercise  Price of such
Warrants.

         1.5  "Governmental  Authority"  shall  include the country,  the state,
county,  city and  political  subdivisions  in which any Person or such Person's
property is located or which exercises valid  jurisdiction  over any such Person
or such Person's property, and any court, agency, department, commission, board,
bureau or instrumentality  of any of them including  monetary  authorities which
exercises  valid  jurisdiction  over any such Person or such Person's  property.
Unless  otherwise  specified,  all references to Governmental  Authority  herein
shall mean a Governmental  Authority having jurisdiction over, where applicable,
the Company, its subsidiaries and their properties or the Holders.

         1.6  "Governmental  Requirement"  shall  mean any law,  statute,  code,
ordinance, order, determination, rule, regulation, judgment, decree, injunction,
franchise,  permit,  certificate,  license,  authorization or other directive or
requirement  (whether  or not  having  the  force  of law),  including,  without
limitation, energy regulations and occupational,  safety and health standards or
controls, of any Governmental Authority.

         1.7  "Material  Adverse  Effect"  shall mean any  material  and adverse
effect  on  (i)  the  assets,   liabilities,   financial  condition,   business,
operations,  affairs or circumstances of the Company and its subsidiaries  taken
<PAGE>

as a whole or (ii) the ability of the Company  and its  subsidiaries  taken as a
whole to carry out their  business  as at the date  hereof (or as proposed as of
the date hereof to be conducted) or of the Company to meet its obligations under
this Warrant Agreement.

         1.8      "1933 Act" means the Securities Act of 1933, as amended.

         1.9 "Person" means any natural  person,  sole  proprietorship,  general
partnership,   limited  partnership,   joint  venture,   trust,   unincorporated
organization,  association,  corporation,  institution,  private or governmental
entity, or party.

         1.10 "Publicly Traded" has the meaning ascribed to such term in Section
1.4.

         1.11  "Subscription  Notice"  means a written  notice to the Company of
Holder's  election to exercise its right under the  Warrants to purchase  Common
Stock, in substantially the form of Exhibit B attached hereto.

         1.12 "Warrants" means the Warrants issued under this Warrant  Agreement
and any  Warrants  issued  in  substitution  for such  Warrants  in each case in
substantially the form of Exhibit A hereto.

         1.13  "Warrant  Stock"  means  the  shares  of  Common  Stock  or other
securities to be acquired upon the exercise of the Warrants.

                                    Article 2

                     Form, Issuance and Exercise of Warrant

         2.1 Issuance of Warrants;  Form of Warrant.  The Company will issue and
deliver the Warrants,  pursuant to the instructions of Chase, to Chase Manhattan
Capital  Corporation,  an affiliate of Chase, on the Closing Date referred to in
the Facility  upon delivery by such entity of an  investment  letter  reasonably
satisfactory  to the Company.  The number of Warrants to be issued and delivered
shall be 130. The text of each Warrant  shall be  substantially  as set forth in
Exhibit A attached  hereto.  The  Warrants  shall be  executed  on behalf of the
Company by the  signature  of the  present or any future  Chairman of the Board,
President, Vice President or Treasurer of the Company, under its corporate seal,
affixed or in  facsimile,  attested  by the  signature  of the present or future
Secretary  or an  Assistant  Secretary  of the  Company.  A Warrant  bearing the
signature of individuals who were at any time the proper officers of the Company
shall bind the  Company  notwithstanding  that such  individuals  or any of them
shall have ceased to hold such offices  prior to the delivery of such Warrant or
did not hold such offices on the date of this Warrant Agreement.  Warrants shall
be dated as of the date of execution  thereof by the Company either upon initial
issuance or upon division,  exchange,  substitution  or transfer.  The number of
shares of Common Stock purchasable and the Exercise Price payable therefor,  are
subject to adjustment as hereinafter set forth.
<PAGE>

         2.2 Terms of Warrants.  (a) Each Warrant entitles the Holder thereof to
purchase  one share of Common  Stock at any time from  September  12, 1994 until
5:00 P.M.,  New York time, on the  Expiration  Date at a purchase price equal to
$3,000.00 per share,  as adjusted in  accordance  with the terms of this Warrant
Agreement  (the "Exercise  Price").  The Exercise Price and the number of shares
issuable upon exercise of Warrants are subject to adjustment upon the occurrence
of certain events  pursuant to the provisions of Section 2.2(b) and Section 4 of
this Warrant Agreement.

         (b) In the event that the Company elects to extend the maturity date of
the amounts  outstanding  under the  Facility to February  10, 1995  pursuant to
Section  2.05 of the  Facility  or in the event the  Company  fails to make such
election  and fails to pay all of the  principal of and interest on the Loan (as
defined in the Facility) when due,  whether at stated maturity or as a result of
acceleration,  the number of shares of Warrant Stock thereafter purchasable upon
the exercise of each Warrant shall be determined  by  multiplying  the number of
shares of  Warrant  Stock  theretofore  purchasable  upon the  exercise  of each
Warrant by 3.85 and the Exercise  Price shall be determined by  multiplying  the
Exercise Price then in effect by 0.467.  In the event that the Company elects to
extend the maturity date of the amounts  outstanding under the Facility to March
10, 1995  pursuant to Section  2.05 of the  Facility or in the event the Company
fails  to make  such  election  and  fails  to pay all of the  principal  of and
interest on the Loan (as defined in the  Facility)  when due,  whether at stated
maturity or as a result of  acceleration,  the number of shares of Warrant Stock
thereafter  purchasable upon the exercise of each Warrant shall be determined by
multiplying the number of shares of Warrant Stock  theretofore  purchasable upon
the exercise of each Warrant by 1.30 and the Exercise  Price shall be determined
by multiplying the Exercise Price then in effect by 0.714.

         2.3  Exercise.  Warrants may be  exercised in whole or in part.  In the
event of a partial exercise, the Company shall execute and deliver to the Holder
(or to such other Person as shall be  designated in the  Subscription  Notice) a
new Warrant covering the unexercised portion of the Warrant Stock.

         2.4 Procedure. Subject to the provision of this Warrant Agreement, each
Holder shall have the right to purchase  from the Company (and the Company shall
issue and sell to such Holder) the number of fully paid and nonassessable shares
of Common Stock  specified in such Warrants as adjusted in  accordance  with the
terms of this Warrant  Agreement,  upon delivery to the Company at its principal
office of:

         (a)      a  written   notice,   in   substantially   the  form  of  the
                  Subscription  Notice, of the Holder's election to exercise the
                  Warrant;

         (b)      a check  payable to the Company in the amount of the  Exercise
                  Price; and

         (c)      the Warrant.
<PAGE>

At the option of the Holder,  the Exercise Price may be paid by surrender to the
Company of indebtedness  owed by the Company  pursuant to the Facility (in which
case the Company  will accept such  specified  unpaid  principal  amount in full
payment, as if such payment had been made in cash); provided, however, that each
Holder may exercise  the Warrants  without a cash payment as provided in Section
2.9. The Company  shall as promptly as  practicable,  and in any event within 10
days after  receipt of such notice,  execute and deliver or cause to be executed
and  delivered one or more  certificates  representing  the aggregate  number of
shares of Warrant Stock to which the Holder is entitled,  and, if the Warrant is
exercised in part, a new Warrant as set forth in Section 2.3.

         2.5 Name and  Effective  Date.  The stock  certificate(s)  so delivered
shall be issued in the name of the  Holder or such  other name or names as shall
be designated in the notice specified in Section 2.4. Such stock  certificate(s)
shall be deemed  to have  been  issued  and such  Holder or any other  Person so
designated to be named therein shall be deemed for all purposes to have become a
Holder of record of such shares as of the date the Company actually receives the
notice specified in Section 2.4.

         2.6  Expenses.  The Company shall pay all  expenses,  taxes,  and other
charges payable in connection with the preparation, issue, and delivery of stock
certificate(s)  representing  Warrant  Stock,  except  that,  in case such stock
certificate(s) shall be registered in a name or names other than the name of the
Holder,  stock  transfer  taxes that are payable upon the issuance of such stock
certificate(s) shall be paid by the Holder.

         2.7 Legal  Requirements.  The Warrant Stock issued upon the exercise of
the Warrants shall be validly issued, fully paid, and nonassessable.

         2.8  Fractional  Shares.  The  Company  shall not be  required to issue
fractional  Warrant Stock on the exercise of Warrants.  If more than one Warrant
shall be presented for exercise in full at the same time by the same Holder, the
number of full shares of Warrant Stock which shall be issuable upon the exercise
thereof  shall be  computed  on the basis of the  aggregate  number of shares of
Warrant  Stock  purchasable  on exercise of the  Warrants so  presented.  If any
fraction of a share of Warrant  Stock would,  except for the  provisions of this
Section 2.8, be issuable on the exercise of any Warrant (or  specified  portion,
thereof),  then (a) if the  fraction of a share of Warrant  Stock which would be
issuable  is .50 or less of a share then the  number of shares of Warrant  Stock
issuable  shall be  rounded  down to the next lower  whole  share and (b) if the
fraction of a share of Warrant Stock which would be issuable is greater than .50
of a share then the number of shares of Warrant Stock  issuable shall be rounded
up to the next higher whole share.

         2.9 Cashless  Exercise.  Notwithstanding  any provision of this Warrant
Agreement to the contrary,  the Company agrees that, in addition to the Holder's
rights under this Warrant  Agreement,  the Holder may,  upon any full or partial
exercise of the Warrants,  at its election,  pay the  aggregate  Exercise  Price
applicable to such exercise by delivering  Warrants to the Company and receiving
from the Company in return  therefor the number of shares of Common Stock having
a Fair Market  Value on the date of exercise  equal to the Fair Market  Value of
<PAGE>

the Warrant as established by the last sentence of Section 1.4.

         2.10 Lock Up  Agreement.  If  reasonably  requested by the  underwriter
managing an initial  public  distribution  of the Company's  Common  Stock,  the
Holder shall execute the suggested agreement providing for a period of time (the
"Lock Up Period")  immediately  following  the  effective  date of the Company's
registration statement (which Lock Up Period shall not exceed the Lock Up Period
requested of other  significant  holders of the  Company's  Common Stock) during
which period the Holder will not sell its Warrant Stock into the public markets.
The  Holder's  undertaking  in this  regard  will not  extend to  Warrant  Stock
included in the registration statement,  whether pursuant to Section 9 hereof or
otherwise,  and shall lapse if the  aggregate  holdings of Holder  shall fail to
represent at least 5% of the Company's outstanding Common Stock.

                                    Article 3

                              Exchange and Transfer

         3.1  Registration.   The  Warrants  shall  be  numbered  and  shall  be
registered  on the books of the Company  (the  "Warrant  Register")  as they are
issued.  The  Warrants  shall be  registered  initially  in such  names and such
denominations as Chase has specified to the Company.

         3.2 Exchange of Warrant  Certificates.  Subject to any restriction upon
transfer set forth in this Warrant  Agreement and in the Warrants,  each Warrant
certificate  may be  exchanged  at the option of the Holder  thereof for another
certificate  or  certificates  of different  denominations  entitling the Holder
thereof to purchase  upon  surrender to the Company a like  aggregate  number of
shares of Warrant Stock as the  certificate  or  certificates  surrendered  then
entitle  such  Holder to  purchase.  Any Holder  desiring  to exchange a Warrant
certificate or certificates  shall make such request in writing delivered to the
Company, and shall surrender, properly endorsed, the certificate or certificates
to be so  exchanged.  Thereupon,  the Company  shall  execute and deliver to the
person entitled thereto a new Warrant  certificate or certificates,  as the case
may be,  as so  requested;  provided,  however,  that the  Company  shall not be
required to execute and deliver a new Warrant  certificate or recognize as valid
any transfer  which  results in there being more than twenty  record  holders of
Warrants issued under this Warrant Agreement.  Any Warrant issued upon exchange,
transfer or partial  exercise of the Warrants  shall be the valid  obligation of
the Company, evidencing the same generic rights and entitled to the same generic
benefits  under this  Warrant  Agreement as the  Warrants  surrendered  for such
exchange, transfer or exercise.

         3.3 Permitted  Transferees.  The Warrants may not be transferred except
in accordance  with the  limitations  specified in Section 3.4 and provided that
any transferee of Warrants shall take such Warrants  subject to the restrictions
on transfer  contained in this Warrant  Agreement and the Warrants.  Transfer of
the Warrants is subject to the Company's  right to repurchase  the Warrant Stock
<PAGE>

as specified in Section 7.1 herein ("Right of First Refusal").  Record ownership
of Warrants may not be transferred if as a result of such purported transfer the
Warrants would be held of record by more than twenty Persons.

         3.4 Securities  Laws.  Neither the Warrants nor the Warrant Stock shall
be transferable unless:

                  (a) either a registration  statement  under the 1933 Act is in
         effect  covering the Warrants or the Warrant Stock, as the case may be,
         or the Company  has  received an opinion  from  Company  counsel to the
         effect  that such  registration  is not  required,  or the  Holder  has
         furnished to the Company an opinion of Holder's counsel,  which counsel
         shall be  reasonably  satisfactory  to the Company,  to the effect that
         such registration is not required; and

                  (b) the transfer complies with any applicable state securities
         laws.

In the event Holder seeks an opinion as to transfer  without  registration  from
Holder's counsel, the Company shall provide such factual information to Holder's
counsel as Holder's counsel may reasonably  request for the purpose of rendering
such opinion and such counsel may rely on the accuracy and  completeness of such
information in rendering such opinion.

         Upon issuance,  every certificate  representing Warrants or the Warrant
Stock will bear a legend  describing the  restrictions  on transfer set forth in
this Section 3.4.

         3.5 Procedure. The Holder may transfer the Warrants on the books of the
Company by surrendering to the Company:

                  (a)      the Warrant;

                  (b) a written assignment of the Warrant,  in substantially the
         form of the  Assignment  attached  as  Exhibit  C  hereto,  naming  the
         assignee duly executed by the Holder; and

                  (c) funds  sufficient to pay any stock  transfer taxes payable
         upon the making of such transfer.

The Company shall thereupon execute and deliver a new Warrant in the name of the
assignee  specified  in such  instrument  of  assignment,  and if the Warrant is
transferred  in part,  the Company shall also execute and deliver in the name of
the Holder a new warrant covering the untransferred portion of the Warrant. Upon
issuance of the new Warrant or Warrants,  the Warrant  surrendered  for transfer
shall be cancelled by the Company.
<PAGE>

         3.6 Expenses.  The Holder shall pay all transfer taxes payable and fees
of its counsel for legal opinions required by Section 3.4 in connection with the
issue and delivery of any new Warrant under this Article 3.

                                    Article 4

                          Adjustments to Exercise Price
                                       and
                        Number of Shares of Warrant Stock

         4.1 Stock Splits,  Stock Dividends and Reverse Stock Splits.  If at any
time while the Warrants remain  outstanding the Company shall (i) pay a dividend
in shares of  Common  Stock or make a  distribution  of  Common  Stock,  or (ii)
subdivide (by  reclassification,  by the issuance of a Common Stock  dividend on
Common  Stock,  or  otherwise)  its  outstanding  shares of Common  Stock into a
greater number,  the number of shares of Common Stock that may be purchased upon
exercise of the Warrants shall be increased  proportionately as of the effective
date of such action. The effective date of a stock dividend shall be the date on
which the  dividend is declared.  All other  adjustments  made  pursuant to this
Section 4.1 shall become effective  immediately after the effective date of such
event  retroactive  to the record date,  if any,  for such event.  Issuance of a
Common Stock  dividend  shall be treated as a subdivision of the whole number of
shares of Common Stock outstanding  immediately  before the record date for such
dividend  into a number  of  shares  equal to such  whole  number  of  shares so
outstanding plus the number of shares issued as a stock dividend. If at any time
while  the  Warrants   remain   outstanding   the  Company   shall  combine  (by
reclassification  or otherwise) its outstanding number of shares of Common Stock
into a lesser number, the number of shares of Common Stock that may be purchased
hereunder shall be reduced  proportionately  and the Exercise Price per share of
Common Stock shall be increased proportionately as of the effective date of such
action.

         4.2 Dividends Other than in Common Stock or Cash: Other  Distributions.
If at any time while the Warrants  remain  outstanding the Company shall declare
or make for the benefit generally of holders of its Common Stock any dividend or
distribution  upon its  Common  Stock  other than  ordinary  cash  dividends  or
distributions to which Section 4.1 or 4.3 apply (whether payable in stock of any
class or  classes  other  than its  Common  Stock or  payable  in  evidences  of
indebtedness  or assets or in rights,  options,  or warrants or  convertible  or
exchangeable securities), then in each case the number of shares of Common Stock
that may be purchased  upon  exercise of the  Warrants  shall be  determined  by
multiplying  the number of shares of Common  Stock  theretofore  comprising  the
Warrant  Stock by a fraction,  the  numerator  of which shall be the Fair Market
Value per share of the Common Stock determined in accordance with Section 1.4 as
of the record date for such  dividend or  distribution  and the  denominator  of
which shall be the Fair Market Value per share, as so determined,  less the fair
value as of such date,  as  reasonably  determined in good faith by the Board of
Directors  of the  Company,  of the  portion of such  dividend  or  distribution
applicable to one share of Common Stock.  Such adjustment shall be made whenever
<PAGE>

any such  distribution  is  made,  and  shall  become  effective  on the date of
distribution   retroactive  to  the  record  date  for  the   determination   of
shareholders  entitled to receive the distribution.  No adjustment in the number
of shares of Warrant Stock purchasable upon the exercise of each Warrant need be
made under this Section 4.2 if the Company  issues or distributes to each Holder
that portion of such dividend or distribution  which each Holder would have been
entitled to receive had the Warrants  been  exercised  prior to the happening of
such event or the record date with respect thereto.

         4.3 Issuance of Options,  Warrants or Rights.  If at any time while the
Warrants remain  outstanding the Company shall grant generally to holders of its
Common Stock any rights, options or warrants (referred to in this Section 4.3 as
"Rights") entitling them to purchase shares of Common Stock at a price per share
which is lower at the date of  issuance  than the  greater  of (a) the  Exercise
Price and (b) the Fair Market Value of the Common Stock on such date  determined
in accordance  with Section 1.4 (the "Greater  Price"),  the number of shares of
Common  Stock that may be  purchased  upon  exercise  of the  Warrants  shall be
determined  by  multiplying  the  number of shares of Common  Stock  theretofore
purchasable upon exercise of each Warrant by a fraction,  the numerator of which
shall be the number of shares of Common Stock  outstanding on such issuance date
plus the  number of  shares  offered  pursuant  to the  Rights  and of which the
denominator  shall be the number of shares of Common Stock  outstanding  on such
issuance  date plus the number of shares which the aggregate  offering  price of
the total number of shares of Common Stock offered  pursuant to the Rights would
purchase at the Greater  Price.  Such  adjustment  shall be made  whenever  such
rights, options or warrants are issued and shall become effective  retroactively
after the record date for the determination of shareholders  entitled to receive
such rights, options or warrants.

         On the expiration or  termination  of any of the Rights,  the number of
shares of Common  Stock then  purchasable  upon the exercise of each Warrant and
the  exercise  price then in effect  shall be subject  to  readjustment  and the
number of shares of Common  Stock  subject to the  Warrants  shall  forthwith be
decreased and the exercise price under the Warrants shall forthwith be increased
to that  which  would  have  been in effect  at the time of such  expiration  or
termination had such Rights, to the extent outstanding immediately prior to such
expiration or termination, never been issued.

         4.4 Other  Issuances of Common  Stock.  In case the Company shall while
the  Warrants  remain  outstanding  sell and issue shares of Common Stock (other
than pursuant to rights, options,  warrants, or convertible securities initially
issued before the date of this Warrant Agreement) or rights,  options,  warrants
or  convertible  securities  containing  the right to subscribe  for or purchase
shares  of  Common  Stock  (excluding  shares,  rights,  options,   warrants  or
convertible  securities  issued in any of the transactions  described in Section
4.1, 4.2 or 4.3 above) at a price per share of Common Stock (determined,  in the
case of such  rights,  options or  warrants,  by  dividing  (w) the total of the
consideration  received or  receivable  by the Company  (determined  as provided
below)  in  consideration  of the sale and  issuance  of such  rights,  options,
warrants or convertible securities,  by (x) the total number of shares of Common
Stock covered by such rights, options, warrants or convertible securities) lower
<PAGE>

than the Greater  Price in effect  immediately  prior to such sale and issuance,
then the  number of shares of  Warrant  Stock  thereafter  purchasable  upon the
exercise of the Warrants shall be determined by multiplying the number of shares
of Warrant  Stock  theretofore  purchasable  upon  exercise by a  fraction,  the
numerator of which shall be the number of shares of Common Stock  outstanding on
the date of issuance of such shares,  rights,  options,  warrants or convertible
securities plus the number of additional  shares of Common Stock sold or subject
to  issuance  pursuant  to  such  rights,   options,   warrants  or  convertible
securities, and of which the denominator shall be the number of shares of Common
Stock  outstanding  on the date of issuance  of such  shares,  rights,  options,
warrants or  convertible  securities  plus the number of shares of Common  Stock
which the aggregate consideration received or receivable (determined as provided
below) for such sale or issuance would purchase at the Greater Price;  provided,
however,  that the  adjustment,  if any, to be made hereunder as a result of the
issuance of Common  Stock for up to $32.0  million on or before  March 30, 1995,
shall be based upon an issuance  price of  $2,600.00  per share in the event the
actual issuance price per share is less than such amount, and provided,  further
that no adjustment  shall be made  hereunder as a result of the grant of options
or rights to acquire,  or the issuance of Common  Stock,  which in the aggregate
does not exceed 10% the Company's outstanding Common Stock and which are granted
or issued at a price not less than 50% of the then  current Fair Market Value to
employees  or  directors  of the Company  pursuant  to any  benefit  plan of the
Company upon the  authorization of a committee of the Board of Directors meeting
the  independence  requirements  set  forth  in  rule  16b-3  of the  rules  and
regulations  promulgated by the Securities and Exchange  Commission  pursuant to
the Securities  Exchange Act of 1934, as amended.  Such adjustment shall be made
successively  whenever  such an  issuance  is  made.  For the  purposes  of such
adjustments, the consideration received or receivable by the Company for rights,
options,   warrants  or  convertible  securities  shall  be  deemed  to  be  the
consideration  received  by the Company for such  rights,  options,  warrants or
convertible  securities,  plus the  consideration  or  premiums  stated  in such
rights, options, warrants or convertible securities to be paid for the shares of
Common Stock covered thereby. In case the Company shall sell and issue shares of
Common Stock, or rights, options,  warrants or convertible securities containing
the  right  to  subscribe  for  or  purchase  shares  of  Common  Stock,  for  a
consideration  consisting,  in whole or in part, of property  other than cash or
its  equivalent,  then in determining  the "price per share of Common Stock" and
the  "consideration  received or receivable by the Company" for purposes of this
Section  4.4,  the  Board  of  Directors  shall  determine,  in its  good  faith
discretion, the fair value of said property, and such determination,  if made in
good faith, shall be binding upon all Holders.

         4.5  Reorganization  and  Reclassification.  In  case  of  any  capital
reorganization or any reclassification of the capital stock of the Company while
the Warrants remain outstanding,  the Holder of the Warrants shall thereafter be
entitled to purchase pursuant to the Warrants (in lieu of the kind and number of
shares of Common Stock comprising Warrant Stock that such Holder would have been
entitled to  purchase  or acquire  immediately  before  such  reorganization  or
reclassification) the kind and number of shares of stock of any class or classes
or other  securities  or property  for or into which such shares of Common Stock
<PAGE>

would have been exchanged,  converted,  or reclassified if the Warrant Stock had
been purchased  immediately before such reorganization or  reclassification.  In
case of any such reorganization or reclassification,  appropriate  provision (as
determined  by  resolutions  of the Board of Directors of the Company)  shall be
made with  respect to the rights and  interest  thereafter  of the Holder of the
Warrants,  to the  end  that  all  the  provisions  of  this  Warrant  Agreement
(including adjustment  provisions) shall thereafter be applicable,  as nearly as
reasonably  practicable,  in  relation  to such  stock  or other  securities  or
property.

         4.6 Statement of Adjustment  of Warrant  Stock.  Whenever the number or
kind of shares comprising  Warrant Stock or the Exercise Price is adjusted,  the
Company  shall  promptly  give  written  notice and a  certificate  of a firm of
independent public accountants  selected by the Board of Directors (which may be
the Company's regular  independent  accountants) to each Holder of record of the
outstanding  Warrants,  stating that such an  adjustment  has been  effected and
setting  forth the number and kind of shares  purchasable  and the amount of the
then-current  Exercise  Price,  and  stating  in  reasonable  detail  the  facts
requiring such adjustment and the calculation of such adjustment.

         4.7      Adjustment Procedures.

                  (a) Whenever the number of shares of Warrant Stock purchasable
         upon the exercise of each Warrant is adjusted  pursuant to this Article
         4, as herein provided,  the Exercise Price payable upon the exercise of
         each  Warrant  shall be adjusted by  multiplying  such  Exercise  Price
         immediately  prior to such  adjustment  by a  fraction,  of  which  the
         numerator  shall be the number of shares of Warrant  Stock  purchasable
         upon the exercise of such Warrant immediately prior to such adjustment,
         and of which the  denominator  shall be the number of shares of Warrant
         Stock  purchasable  immediately  thereafter.  If any event or condition
         occurs as to which other  provisions of this Section 4 are not strictly
         applicable  or if  strictly  applicable  would not fairly  protect  the
         exercise or purchase  rights of the  Warrants  in  accordance  with the
         essential  intent and  principles  of such  provisions,  or which might
         materially and adversely  affect the exercise or purchase rights of the
         Holders  under any  provision of the  Warrants,  then the Company shall
         make an adjustment in the application of such provisions, in accordance
         with such  essential  intent  and  principles,  so as to  protect  such
         exercise and purchase rights as aforesaid, and any adjustment necessary
         with respect to the Exercise  Price and the number of shares of Warrant
         Stock  purchasable  hereunder  so as to preserve  without  dilution the
         rights of the holders of Warrants.

                  (b) For the  purpose of this  Article 4, the terms  "shares of
         Common  Stock"  shall  mean (i) the  class of stock  designated  as the
         Common Stock of the Company at the date of this Warrant  Agreement,  or
         (ii) any other  class of stock  resulting  from  successive  changes or
         reclassifications  of such shares  consisting  solely of changes in par
         value,  or from par value to no par value,  or from no par value to par
         value. In the event that at any time, as a result of an adjustment made
<PAGE>

         pursuant  to Section  4.1  above,  the  Warrant  Holders  shall  become
         entitled to purchase any securities of the Company other than shares of
         Common  Stock,  thereafter  the  number  of such  other  securities  so
         purchasable  upon  exercise of each Warrant and the  Exercise  Price of
         such  securities  shall be subject to adjustment from time to time in a
         manner  and  on  terms  as  nearly  equivalent  as  practicable  to the
         provisions  with respect to the Warrant Stock.  The number of shares of
         Common  Stock  outstanding  at any given time shall not include  shares
         owned or held by or for the account of the Company, and the disposition
         of any such shares shall be considered an issue or sale of Common Stock
         for the purposes of this Article 4.

                  (c) No  adjustment  in the number of shares of  Warrant  Stock
         purchasable under the Warrants shall be required unless such adjustment
         would require an increase or decrease of at least  three-fourths of one
         percent  (.75%) in the  number of shares of Warrant  Stock  purchasable
         upon  the  exercise  of  each  Warrant;  provided,  however,  that  any
         adjustments  which by reason of this  paragraph (c) are not required to
         be made  shall  be  carried  forward  and  taken  into  account  in any
         subsequent  adjustment.  All calculations  shall be made to the nearest
         one-thousandth of a share.

         4.8  Voluntary  Adjustment  by the  Company.  The  Company  may, at its
option,  at any time during the term of the  Warrants,  reduce the then  current
Exercise Price to any amount determined appropriate by the Board of Directors of
the Company.

                                    Article 5

                            Covenants of the Company

         The Company covenants and agrees that:

         5.1 At all times, the Company will reserve and set apart and have, free
from preemptive  rights, a sufficient number of shares of authorized by unissued
Common Stock or other  securities,  if  applicable,  to enable it at any time to
fulfill all its obligations hereunder.

         5.2 Before  taking any action that would cause an  adjustment  reducing
the  Exercise  Price per share below the then par value of the shares of Warrant
Stock issuable upon exercise of the Warrant, the Company will take any corporate
action that may be  necessary  in order that the Company may validly and legally
issue fully paid and nonassessable shares of such Warrant Stock at such adjusted
price.

         5.3      In case the Company proposes:
<PAGE>

                  (a) to pay any dividend,  payable in securities  (of any class
         or classes)  upon its Common Stock or to make any  distribution  (other
         than ordinary cash dividends) to the holders of its Common Stock; or

                  (b) to  subdivide  as a  whole  (by  reclassification,  by the
         issuance of a stock dividend on Common Stock,  or otherwise) the number
         of shares of Common  Stock then  outstanding  into a greater  number of
         shares of Common Stock, with or without par value; or

                  (c) to grant to or offer to the  holders of its  Common  Stock
         generally any rights or options; or

                  (d) to effect any capital  reorganization or  reclassification
         of capital stock of the Company; or

                  (e) to consolidate  with, or merge into, any other corporation
         or business or transfer its property as an entirety or substantially as
         an entirety; or

                  (f) to effect the liquidation,  dissolution,  or winding up of
         the Company; or

                  (g) to make any other  fundamental  change in respect of which
         the Holder of this Warrant would have been  entitled to vote,  pursuant
         to the corporation law of Colorado,  if the Warrant had been previously
         exercised;

then the Company shall cause notice of any such  intended  action to be given to
the Holder of record of the  Warrant  (i) not less than  thirty (30) days before
the date on which the transfer  books of the Company  shall close or a record be
taken for such stock dividend,  distribution,  granting of securities, rights or
options, or for determining rights to vote in respect of any fundamental change,
including any capital reorganization,  reclassification,  consolidation, merger,
transfer, liquidation, dissolution, winding up, or other fundamental change, and
(ii)  in  the  case  of  any  such  capital  reorganization,   reclassification,
consolidation, merger, transfer, liquidation,  dissolution, winding up, or other
fundamental  change  not less than  thirty  (30) days  before  the same shall be
effective.

         5.4 The Company covenants that if any share of Common Stock required to
be reserved for purposes of exercise or conversion of Warrants issued  hereunder
that requires, under any applicable governing rule or regulation of any national
securities   exchange,   registration  with  or  approval  of  any  governmental
authority,  or listing on any such  national  securities  exchange or  quotation
service,  before such shares may be issued upon  exercise,  the Company will use
its best efforts to cause such shares to be duly registered,  approved or listed
on the relevant national  securities  exchange or quotation service, as the case
may be.
<PAGE>

         5.5  The  Company  will  pay  all  documentary  stamp  taxes,  if  any,
attributable  to the  initial  issuance  of Warrant  Stock upon the  exercise of
Warrants  and any  securities  issued  pursuant  to Section 4 hereof;  provided,
however,  that the  Company  shall not be required to pay any tax or taxes which
may be payable in respect of any  transfer  involved in the issue or delivery of
any  Warrants  or  certificates  for  Warrant  Stock and any  securities  issued
pursuant  to  Section 4 hereof in a name  other  than that of the Holder of such
Warrants.

         5.6 In case any of the Warrants  shall be  mutilated,  lost,  stolen or
destroyed,  the Company  shall,  on such  reasonable  terms as to  indemnity  or
otherwise as it may in its discretion impose,  issue and deliver in exchange and
substitution for and upon cancellation of the mutilated  Warrant,  or in lieu of
and in substitution for the Warrant lost, stolen or destroyed,  a new Warrant of
like tenor and representing an equivalent right or interest.

                                    Article 6

                    Not Stockholders; Limitation of Liability

         No provision of this Warrant  Agreement or in any of the Warrants shall
be construed as conferring upon the Holder the right to vote or to consent or to
receive  dividends or to receive dividends or to receive notice as a stockholder
in respect of meetings of  stockholders  for the  election of  directors  of the
Company or any other matter  whatsoever as stockholders  of the Company.  In the
absence of affirmative  action by the Holder hereof to purchase shares of Common
Stock,  no provision  hereof shall give rise to any liability of such Holder for
the purchase price or as a stockholder of the Company, whether such liability is
asserted by the Company or by creditors of the Company.

                                    Article 7

                              Repurchase of Warrant

         7.1 Right of First Refusal. In the event the Holder demands that all or
any part of the Warrant Stock be registered  pursuant to Section 9.2 herein, the
Company  shall have the right to  repurchase  the  Warrant  for cash at its Fair
Market Value as of the date of the demand. In the event the Holder determines to
transfer  all or any  portion of the  Warrants  pursuant to a bona fide offer to
purchase (other than to an affiliate of such Holder), the Company shall have the
right to  repurchase  the  Warrants  at the price of such bona fide  offer.  The
Company must deliver written notice to the Holder of its election not repurchase
the Warrant within 20 business days after receipt of a request by the Holder for
registration  or  receipt of notice by the Holder of its intent to accept a bona
fide  offer,  and such  notification  to the  Holder  must be  accompanied  by a
nonrefundable  cash earnest money deposit to Holder of the lesser of One Hundred
Thousand  Dollars  ($100,000) or the purchase  price of the Warrants  under this
Section 7.1. The Company shall deliver the balance of the purchase  price to the
Holder  within the earlier of the proposed  closing date in the bona fide offer,
if any and 60 days after  delivery of its deposit.  This right of first  refusal
<PAGE>

shall not apply to any transfer to an "affiliate"  (as defined in Rule 405 under
the 1933 Act) of the Holder.

         7.2      Mandatory Repurchase.

                  (a) If the  Company  receives  proceeds  from  any sale of its
         Properties   (as  defined  in  the   Facility)   except  for  sales  of
         Hydrocarbons  (as defined in the  Facility) in the  ordinary  course of
         business  while any  amounts  remain  outstanding  under  the  Facility
         representing 85% or less of its total net assets (based upon the amount
         received for the  Properties  and  otherwise  based upon the good faith
         determination  of the Board of Directors of the  Company),  the Company
         shall,  at the option of the Holders,  repurchase  at their Fair Market
         Value on a date no more than 35  business  days  after the date of such
         sale  such  percentage  of  the  Warrants  as  shall  be  equal  to the
         percentage of its Properties  sold, all in accordance  with a notice of
         repurchase  mailed to each  Holder  on the  earliest  practicable  date
         following  (but in no event later than the 10th business day following)
         the  Company's  receipt  of such  proceeds  which  shall  provide  that
         electing  Holders may return their Warrants  within 20 business days if
         they elect to have the  Company  repurchase  such  Warrants;  provided,
         however,  that the Company shall not be required to offer to repurchase
         any Warrants until its sales of Properties  equal or exceed $10 million
         in the aggregate.  Any partial  repurchase of the Warrants  pursuant to
         this Section 7.2(a) shall be made pro rata among the Holders based upon
         all those Warrants returned for repurchase.

                  (b)  The  Company  shall,  on the  earliest  practicable  date
         following  (but in no event more than 10 business days  following)  the
         Company's  receipt of proceeds from any sale of Properties  (except for
         sales of  Hydrocarbons  in the ordinary  course of business)  while any
         amounts  remain  outstanding  under the  Facility  that  results in the
         Company  having sold in the  aggregate  since the date of this  Warrant
         Agreement  in one or more  transactions  more than 85% or its total net
         assets  (based  upon  the  amount  received  for the  assets  sold  and
         otherwise  based  upon the good  faith  determination  of the  Board of
         Directors of the Company), repurchase all of the Warrants at their Fair
         Market Value on the date of such sale.

                                    Article 8

                                     Mergers

         So long as this Warrant Agreement  remains in effect,  the Company will
not merge or consolidate with or into any other corporation unless the successor
corporation (if not the Company), shall expressly assume, by operation of law or
by  supplemental  agreement  executed and delivered to the Holders,  the due and
punctual  performance and observance of each and every covenant and condition of
this Warrant  Agreement  and the  Warrants to be  performed  and observed by the
Company.
<PAGE>

                                    Article 9

                               Registration Rights

         9.1  Piggyback  Registration  Rights.  If, at any time on or before the
expiration  of the  Warrants,  the  Company  proposes  to  file  a  registration
statement  for the public  sale of any of its equity  securities  under the 1933
Act, other than a registration statement provided for in Section 9.2 hereof, the
Company shall in each case, not later than thirty (30) days prior to the initial
filing of the  registration  statement,  deliver written notice of its intent to
file such registration  statement to the Holders,  setting forth the minimum and
maximum proposed offering price,  commissions,  and discounts in connection with
the offering,  and other relevant information.  The Holders shall be entitled to
include in such registration statement such number of Registrable Securities (as
defined in Section  9.2) as they shall  request  within  twenty  (20) days after
receipt of notice of the Company's intent to file a registration statement.  The
Company  shall  permit,  or shall cause the managing  underwriter  of a proposed
offering  to permit,  the  holders of  Registrable  Securities  requested  to be
included in the registration to include such securities in the proposed offering
on the same terms and conditions as applicable to any similar  securities of the
Company,  if any,  included therein for the account of any person other than the
Company and the holders of Warrants and/or Warrant Stock.  If such  registration
is to involve an  underwritten  public  offering in which the  obligation of the
underwriters  is to take all of the securities to be sold if any are to be taken
and the underwriters  determine that marketing factors require limitation of the
number of  shares  to be  underwritten,  or that the  price  would be  adversely
affected  by the  addition  of such  shares,  then  the  number  of  Registrable
Securities  sought to be included pursuant hereto shall be reduced to the extent
necessary  to eliminate  such adverse  effect.  The Company  shall  continuously
maintain  in  effect  any  registration  statement  with  respect  to which  the
Registrable  Securities have been requested to be included (and are so included)
for  lesser  of (i) 180  days  after  the  effectiveness  of  such  registration
statement or (ii) the  consummation  of the  distribution  by the Holders of the
Registrable Securities ("Piggy-back Termination Date"); provided,  however, that
if at the Piggy-back  Termination Date the Registrable Securities are covered by
a registration  statement  which is, or is required to remain,  in effect beyond
the  Piggy-back  Termination  Date,  the  Company  shall  maintain in effect the
registration  statement as it relates to the Registrable  Securities for so long
as such  registration  statement  remains or is required to remain in effect for
any of such other securities. If officers or directors of the Company or persons
holding  five  percent  (5%) or more of any  class of equity  securities  of the
Company request  inclusion in such  underwriting,  the Company may offer to such
officers  or  directors   that  such  other   securities   be  included  in  the
underwriting,  provided,  however,  that  if the  underwriters  determines  that
marketing factors require limitation of the number of shares to be underwritten,
or that the price would be adversely  affected by the addition of the securities
proposed to be added,  the  securities  of the Company  held by the officers and
directors  and  other  security  holders  of the  Company  and  the  Registrable
Securities  shall be  excluded  from such  registration  and  underwriting  on a
pro-rata basis to the extent necessary to eliminate such adverse effect. Nothing
<PAGE>

in this  Section  9.1 shall be  construed  as giving  the  Holders  any right to
restrain, enjoin, or otherwise delay registration.

         9.2 Demand  Registration  Rights. The Company covenants and agrees with
Chase and any  subsequent  holders of the  Warrants  and/or  Warrant  Stock that
within 60 days after  receipt of a written  request  from  Holders,  the Company
shall  file a  registration  statement  (and use its best  efforts to cause such
registration  statement to become effective under the 1933 Act) provided that in
the opinion of the Company's counsel,  no events preclude such registration with
respect to the  offering and sale or other  disposition  of such of the Warrants
and/or Warrant Stock (including any securities  received by the Holders pursuant
to Section 4 hereof) (all such securities,  the "Registrable Securities") as the
Holders  shall  elect  which  amount  shall  constitute  at  least  50%  of  the
Registrable  Securities,  provided,  however,  that  the  Company  shall  not be
required to comply with such demand until after it has first  become  subject to
periodic  reporting  requirements  under the  regulations  of the Securities and
Exchange Commission (the  "Commission").  The Company shall use its best efforts
continuously to maintain the  effectiveness of such  registration  statement for
the  lesser  of (i) 180  days  after  the  effective  date  of the  registration
statement or (ii) the  consummation  of the  distribution  by the holders of the
Registrable  Securities covered by such registration statement (the "Termination
Date");  provided,  however,  that  if at  the  Termination  Date,  the  offered
securities  are covered by a  registration  statement  which also  covers  other
securities  and which is  required  to remain in effect  beyond the  Termination
Date,  the Company shall  maintain in effect such  registration  statement as it
relates to the Registrable Securities for so long as such registration statement
(or any subsequent  registration  statement) remains or is required to remain in
effect for any of such other  securities.  The Company  shall not be required to
comply with more than two  requests  for  registration  pursuant to this Section
9.2. If the Holders intend to distribute the Registrable  Securities  covered by
their request by means of an underwriting, they shall so advise the Company as a
part of their  request made  pursuant to this  Section  9.2.  The Company  shall
(together with Holders who propose to distribute their  securities  through such
underwriting)  enter into an  underwriting  agreement in  customary  form with a
representative of the underwriter or underwriters selected for such underwriting
by a majority in interest of the Holders.

         If a registration  requested pursuant to this Section 9.2 is to involve
an underwritten  public offering in which the obligation of the  underwriters is
to take all of the  shares to be sold if any are to be taken,  the  Company  and
other  holders of  securities  of the  Company may  include  securities  in such
registration only with the consent of the Holders.

         In the event  that the Holder  demands  registration  pursuant  to this
Section  9.2  within  the six  months  immediately  prior to  expiration  of the
Warrants, and the Company,  through no fault of the Holder, is unable to provide
such  registration,  the expiration date of this Warrant shall be extended until
the thirtieth (30th) day after a registration statement is declared effective.
<PAGE>

         9.3  Filing  Obligations  of  the  Company.   In  connection  with  any
registration of Registrable  Securities  effected under Sections 9.1 or 9.2, the
Company shall:

                  (a)  prepare  and file  the  registration  statement  and such
         amendments  and  supplements  to the  registration  statement  and  the
         prospectus or offering circular used in connection  therewith as may be
         necessary to keep the registration statement effective for the required
         period and to comply with the  provisions of the 1933 Act and the rules
         and  regulations  thereunder  with  respect to the  disposition  of all
         Registrable  Securities  covered by the registration  statement for the
         period required to effect the distribution thereof;

                  (b)  furnish  to the  Holder  such  number  of  copies  of any
         prospectus or offering  circular,  including a preliminary  prospectus,
         and of a full  registration  statement and exhibits in conformity  with
         the requirements of the 1933 Act and rules and regulations  thereunder,
         as the  Holder  may  reasonably  request  in  order to  facilitate  the
         disposition of such securities;

                  (c)  use  its  best   efforts  to   register  or  qualify  the
         Registrable  Securities covered by the registration statement under the
         securities  or blue sky laws of such  jurisdictions  as the  Holder may
         reasonably  request,  and  accomplish any and all other acts and things
         which  may  be   necessary   or   advisable  to  permit  sale  in  such
         jurisdictions of such Registrable Securities;  provided,  however, that
         the Company shall not be required to register as a dealer or to qualify
         as a foreign  corporation  in any such  jurisdictions  or to escrow any
         shares of its capital  stock;  and  provided,  further that the Company
         shall  not  be  obligated  to  register  or  qualify  the   Registrable
         Securities for sale in any particular  state in which the Company would
         be  required  to  execute a general  consent  to  service of process in
         effecting such registration or qualification.

                  (d) enter into indemnity and contribution agreements,  each in
         customary  form,  with each  underwriter,  if any,  and each  holder of
         Registrable Securities included in such registration statement; and, if
         requested,  enter into an underwriting  agreement  containing customary
         representations,  warranties,  covenants,  allocation of expenses,  and
         customary closing conditions including, but not limited to, opinions of
         counsel,  accountants'  cold comfort  letters and petroleum  engineers'
         reports,  with any  underwriter  who  participates  in the  offering of
         Registrable Securities;

                  (e) list the  Warrant  Stock on each  securities  exchange  on
         which the Common Stock is listed.

         9.4 Expenses.  All expenses  incurred by the Company in connection with
any registration of Registrable  Securities  effected under Sections 9.1 or 9.2,
including,  without  limitation,  all  registration  or  filing  fees,  fees and
expenses  of  complying  with  state  securities  and  blue sky  laws,  printing
expenses,  fees and expenses of the Company's  counsel and accountants  shall be
<PAGE>

paid by the Company;  provided,  however,  that all  underwriting  discounts and
selling commissions  applicable to the Registrable Securities shall not be borne
by the Company but shall be borne by the Holder.

         9.5      Indemnification.

                  (a) By the  Company.  In  connection  with the  filing  of any
         registration statements and sales of Registrable Securities thereunder,
         the Company shall  indemnify and hold harmless the Holders of Warrants,
         any underwriter,  the directors,  officers, employees and agents of the
         Holders and each underwriter and each Person,  if any, who controls the
         Holder or the underwriter  within the meaning of the 1933 Act,  against
         losses, claims, damages or liabilities, joint or several (or actions in
         respect thereto) ("Losses"), insofar as such Losses arise out of or are
         based upon any untrue  statement  or alleged  untrue  statement  of any
         material  fact  contained  in any  registration  statement  under which
         Warrant  Stock  was  registered  under the 1933  Act,  any  preliminary
         prospectus or final prospectus  contained therein,  or any amendment or
         supplement  thereto,  or any  report  filed  by the  Company  with  the
         Securities and Exchange  Commission (the  "Disclosure  Documents"),  or
         arise out of or are based  upon the  omission  or alleged  omission  to
         state  therein  a  material  fact  required  to be  stated  therein  or
         necessary  to make the  statements  therein  not  misleading,  and will
         reimburse any such Holder,  underwriter,  or controlling Person for any
         legal or any other  expenses  reasonably  incurred in  connection  with
         investigating or defending any such claims,  excluding any amounts paid
         in  settlement  of  litigation,   commenced  or  threatened,   if  such
         settlement  is  effected  without  the  prior  written  consent  of the
         Company; provided, however, that the Company shall not be liable in any
         such case to the extent that any such Losses  arise out of or are based
         upon any untrue  statement,  alleged  untrue  statement  or omission or
         alleged omission made in such Disclosure  Document in reliance upon and
         in conformity with  information  furnished to the Company in writing by
         or on behalf of the Holder specifically for inclusion therein.

                  (b) By the  Holder.  In  connection  with  the  filing  of any
         registration  statement and sales of Registrable Securities thereunder,
         the Holder shall indemnify the Company, each of its directors,  each of
         its officers  who signed such  registration  statement,  and each other
         Person, if any, who controls the Company within the meaning of the 1933
         Act,  against any Losses to which the  Company,  any of its  directors,
         officers,  or controlling Persons may become subject under the 1933 Act
         or otherwise, insofar as such Losses arise out of or are based upon any
         untrue  statement or alleged  untrue  statement  of any  material  fact
         contained  in any of the  Disclosure  Documents  or arise out of or are
         based upon the omission or alleged omission to state therein a material
         fact required to be stated  therein or necessary to make the statements
         therein not misleading,  and will reimburse the Company, and any of its
         directors,  officers, or controlling Persons for any legal or any other
         expenses  reasonably  incurred  in  connection  with  investigating  or
         defending any such claims,  excluding any amounts paid in settlement of
<PAGE>

         litigation,  commenced or  threatened,  if such  settlement is effected
         without the prior  written  consent of the Holder,  provided,  however,
         that such indemnification or reimbursement shall be payable in any such
         case only to the extent that such  statement  or alleged  statement  or
         omission  or  alleged  omission  is made  in  reliance  on  information
         furnished  to the  Company  in  writing  by or on behalf of the  Holder
         specifically for inclusion therein.  Notwithstanding  the provisions of
         this  Section  9.5(b),  no Holder  shall be liable  in or  required  to
         contribute an amount exceeding the product of the sales price per share
         (net of any  commissions or  underwriting  discounts) and the number of
         shares or Warrants sold by such Holder.

         9.6  Restrictions  on Public  Sale by the  Company.  To the  extent not
inconsistent  with  applicable  law,  the  Company  agrees (i) not to effect any
public  sale  or  distribution  of any  securities  similar  to the  Registrable
Securities or any securities convertible into or exchangeable or exercisable for
such  securities  (or any option or other  right for such  securities),  for any
securities that may be issued to the Holders pursuant  Section 4 hereof,  during
the 15-day  period  prior to, and during  the  60-day  period  beginning  on the
effective  date  of any  registration  statement  under  which  the  Registrable
Securities are registered in accordance  with Section 9.2 (other than as part of
such registration).

         9.7 Rule 144.  With a view to making  available to Holders the benefits
of certain  rules of the  Commission  that may  permit  the sale of  Registrable
Securities to the public without registration,  the Company hereby covenants and
agrees after it first  becomes  subject to the periodic  reporting  requirements
under the rules and  regulations  of the  Commission to use its best efforts to:
(i) file in a timely manner all reports and other documents required to be filed
by it under the 1933 Act and the  Securities  Exchange Act of 1934 and the rules
and regulations adopted by the Commission  thereunder  necessary to permit sales
under Rule 144 under the 1933 Act, and the Company will take such further action
(not requiring the expenditure of any  out-of-pocket  costs or the taking of any
action not  ordinarily  taken by public  companies to  facilitate  sales) to the
extent  required  from  time to  time  to  enable  Holders  to sell  Registrable
Securities (whether or not any such securities have been the subject of a demand
or piggy-back  request under Article 9 hereof)  without  registration  under the
1933 Act within the limitation of the exemptions  provided by (a) Rule 144 under
the 1933 Act, as such Rule may be amended from time to time,  or (b) any similar
rule or regulation hereafter adopted by the Commission and (ii) promptly furnish
each  Holder a copy of all such  reports  and  documents.  Upon the request of a
Holder,  the  Company  will  deliver to such  Holder a written  statement  as to
whether it has complied with such requirements.

         9.8 Other Registration  Rights. The Company hereby agrees that it shall
not issue any  additional  registration  rights  with  respect  to shares of its
Common Stock,  warrants to purchase its Common Stock or  securities  convertible
into its  Common  Stock,  which are  inconsistent  with the  provisions  of this
Warrant Agreement.
<PAGE>

                                   Article 10

            Representations, Warranties and Covenants of the Company

         The Company hereby represents, warrants and covenants as follows:

         10.1 Existence.  Each of the Company and each of its subsidiaries:  (a)
is a corporation duly organized, legally existing and in good standing under the
laws of the jurisdiction of its incorporation;  (b) has all requisite  corporate
power, and has all material governmental licenses, authorizations,  consents and
approvals  necessary to own its assets and carry on its business as now being or
as  proposed  to be  conducted;  and  (c) is  qualified  to do  business  in all
jurisdictions  in which the nature of the  business  conducted  by it makes such
qualification  necessary  and where  failure so to qualify would have a Material
Adverse Effect.

         10.2 Power and Authority. The Company has all necessary corporate power
and authority to execute,  deliver and perform its obligations under the Warrant
Agreement and the Warrants;  and the execution,  delivery and performance by the
Company of the Warrant  Agreement and the Warrants have been duly  authorized by
all necessary  corporate  action on its part; and the Warrant  Agreement and the
Warrants  constitute  the legal,  valid and binding  obligations  of the Company
enforceable in accordance with their terms, except (i) that such enforcement may
be subject to  bankruptcy,  insolvency,  moratorium  or similar  laws  affecting
creditors'  rights,  and (ii)  that  the  remedy  of  specific  performance  and
injunctive and other forms of equitable relief are subject to certain  equitable
defenses  and to the  discretion  of the  court  before  which  any  proceedings
therefor may be brought.

         10.3  Reservation,  Issuance and Delivery of Common  Stock.  There have
been  reserved for issuance,  and the Company shall at all times keep  reserved,
out of the  authorized  and unissued  shares of Common Stock, a number of shares
sufficient to provide for the exercise of the rights of purchase  represented by
the Warrants,  and such shares,  when issued upon receipt of payment therefor in
accordance with the terms of the Warrants and of this Warrant Agreement, will be
legally and validly issued,  fully paid and  non-assessable  and will be free of
any preemptive  rights of shareholders or any restrictions;  provided,  however,
that  unless the  Holders  shall have  exercised  their  registration  rights in
Section 9 hereof, such shares will not be registered under the Securities Act of
1933, as amended or any state's securities act.

         10.4 Execution and Delivery.  Neither the execution and delivery of the
Warrant  Agreement and the Warrants nor compliance with the terms and provisions
hereof  will  conflict  with our result in a breach of, or require  any  consent
which has not been obtained as of the date hereof, the charter or by-laws of the
Company  or any of its  subsidiaries,  or any  Governmental  Requirement  or any
agreement or  instrument  to which the Company or any of its  subsidiaries  is a
party or by which it is bound or to which it or its properties  are subject,  or
constitute a default under any such  agreement or  instrument,  or result in the
<PAGE>

creation  or  imposition  of any lien upon any of the  revenues or assets of the
Company or any of its  subsidiaries  pursuant to the terms of any such agreement
or  instrument  other  than  the  liens  created  pursuant  to the  terms of the
Facility.  No  authorizations,  approvals  or  consents  of,  and no  filings or
registrations with, any Governmental  Authority are necessary for the execution,
delivery or performance by the Company of the Warrant  Agreement or the Warrants
or for the validity or enforceability thereof.

         10.5  Litigation.  Except as disclosed to Chase in Schedule 7.03 to the
Facility, there is no litigation,  legal, administrative or arbitral proceeding,
investigation  or other action of any nature pending or, to the knowledge of the
Company  threatened  against or affecting the Company or any of its subsidiaries
which involves the possibility of any judgment or liability  against the Company
or any of its  subsidiaries  not fully  covered by insurance  (except for normal
deductibles), and which would have a Material Adverse Effect.

         10.6 Compliance with Laws, Rules,  Regulations and Orders.  Neither the
Company nor any of its subsidiaries has violated any Governmental Requirement or
failed  to  obtain  any  license,   permit,   franchise  or  other  governmental
authorization  necessary  for  the  ownership  of any of its  properties  or the
conduct of its  business,  which  violation or failure  would have (in the event
such  violation  or failure  were  asserted  by any Person  through  appropriate
action) a Material Adverse Effect.

         10.7 No  Material  Misstatements.  No written  information,  statement,
exhibit,  certificate,  document or report furnished to the Holder in connection
with  the  negotiation  of  this  Warrant   Agreement   contained  any  material
misstatement  of fact or omitted to state a material fact or any fact  necessary
to make the statement  contained therein not materially  misleading in the light
of the  circumstances  in which  made and with  respect to the  Company  and its
subsidiaries  taken as a whole.  There is no fact peculiar to the Company or its
subsidiaries  which has a Material Adverse Effect or in the future is reasonably
likely to have (so far as the Company can now foresee) a Material Adverse Effect
and which has not been set forth in this Warrant Agreement,  the Facility or the
other documents,  certificates  and statements  furnished to the Holder by or on
behalf of the Company or its subsidiaries prior to the date hereof in connection
with the transactions contemplated hereby and thereby.

                                   Article 11

                                  Miscellaneous

         11.1 Governing Law. THIS WARRANT AGREEMENT AND THE WARRANTS (INCLUDING,
BUT NOT LIMITED TO, THE VALIDITY AND  ENFORCEABILITY  HEREOF)  SHALL BE GOVERNED
BY, AND CONSTRUED IN ACCORDANCE  WITH, THE LAWS OF THE STATE OF NEW YORK,  OTHER
THAN THE CONFLICT OF LAWS RULES THEREOF.
<PAGE>

         11.2 Notices.  Any notice or other communication  required or permitted
to be given or delivered  pursuant to this Warrant shall be in writing and shall
be deemed given if delivered personally or by facsimile transmission (if receipt
is  confirmed  by the  facsimile  operator of the  recipient),  or  delivered by
overnight  courier  service or mailed by  registered  or certified  mail (return
receipt  requested),  postage prepaid, to the parties at the following addresses
(or at such other  address in the United  States of America for a party as shall
be specified by like notice; provided that notices of change of address shall be
effective only upon receipt thereof):

                  (i)      to the Holder as follows:

                           The Chase Manhattan Bank, N.A.
                           1 Chase Manhattan Plaza
                           New York, New York  10005
                           Attn:  Richard F. Betz
                           Facsimile No.: (212) 552-1687

                           Vinson & Elkins L.L.P.
                           1001 Fannin Street
                           Houston, Texas  77002-6067
                           Attn:  Larry G. Barbour
                           Facsimile No.: (713) 758-2346

                  (ii)     to the Company as follows:

                           Vessels Oil & Gas Company
                           1050 Seventeenth St., Suite 2000
                           Denver, Colorado  80265
                           Attn:  Nicholas Aretakis/Richard Hartfield
                           Facsimile No.:  (303) 825-2532

         11.3 Severability.  If any provision of this Warrant Agreement shall be
held  invalid,   illegal  or  unenforceable  in  any  respect  such  invalidity,
illegality  or  unenforceability  shall not affect any other  provision  of this
Warrant Agreement.

         11.4 Headings. The headings in this Warrant Agreement are for reference
purposes only and are not intended to affect the interpretation of any provision
of this Warrant Agreement.

         11.5 Amendment.  This Warrant  Agreement  cannot be amended or modified
except by a written  agreement.  Any amendment of this Warrant  Agreement may be
effected  with the consent of at least a majority of the total then  outstanding
Warrants; provided that, any amendment which shall have the effect of materially
adversely  affecting  the  interests of any Holder  shall not be effective  with
respect to such Holder if such Holder shall not have consented thereto.
<PAGE>

         11.6 Assignment. This Warrant Agreement shall be binding upon and inure
to the  benefit of the  parties  hereto  and their  respective  heirs,  personal
representatives,  successors  and  assigns  except  that no party may  assign or
transfer its rights or obligations under this Agreement to the extent explicitly
prohibited herein.

         11.7 Right to  Inspection.  The Company  will  permit the Holders  upon
prior notice to the Company,  during  normal  business  hours,  to inspect those
properties,  books and records reasonably related to their interests as Holders,
and will promptly respond to and discuss with such Holders  inquiries  regarding
the management,  business and affairs of the Company;  provided,  however,  that
these  inspection  rights  exist  only for  Holders  of at least 33% of the then
outstanding  Warrants  and;  provided,  further,  that each Holder who  receives
confidential  information  from the  Company  agrees that it will  maintain  the
confidentiality  of such information  except to the extent it is required by law
to disclose such confidential information.

         11.8  Survival  of  Representations,   Warranties  and  Covenants.  All
representations  and  warranties of the Company and all covenants and agreements
made herein shall survive the  execution and delivery of this Warrant  Agreement
and the Warrants and shall remain in force and effect until the Expiration Date.

         11.9  Entire  Agreement.  This  Warrant  Agreement,  together  with its
attachments,  contains the entire  understanding  among the parties  hereto with
respect  to  the   subject   matter   hereof  and   supercedes   all  prior  and
contemporaneous  agreements  and  understandings,   inducements  or  conditions,
express or implied, oral or written, except as herein contained.

         IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this  Warrant
Agreement to be signed by their appropriate officers thereunto duly authorized.

         Dated:  September 12, 1994

                                           VESSELS OIL & GAS COMPANY


                                           By:  /s/ T. J. Vessels
                                           T.J. Vessels, President

                                          CHASE MANHATTAN BANK, N.A.

                                           By:
                                           Name:
                                           Title:


<PAGE>


THE WARRANTS  REPRESENTED BY THIS  CERTIFICATE AND THE SHARES OF COMMON STOCK OR
OTHER  SECURITIES  ISSUABLE  UPON  EXERCISE  THEREOF  MAY NOT BE OFFERED OR SOLD
EXCEPT  PURSUANT  TO  (i)  AN  EFFECTIVE  REGISTRATION  STATEMENT,  OR  (ii)  AN
APPLICABLE  EXEMPTION  FROM  REGISTRATION  UNDER THE SECURITIES ACT OF 1933. ANY
SALE PURSUANT TO CLAUSE (ii) OF THE PRECEDING SENTENCE MUST BE ACCOMPANIED BY AN
OPINION OF COUNSEL  REASONABLY  SATISFACTORY  TO THE  COMPANY TO THE EFFECT THAT
SUCH EXEMPTION FROM REGISTRATION IS AVAILABLE IN CONNECTION WITH SUCH SALE.

THE  TRANSFER OR EXCHANGE  OF THE  WARRANTS  AND COMMON  STOCK  UNDERLYING  SUCH
WARRANTS  REPRESENTED BY THIS  CERTIFICATE IS SUBJECT TO CERTAIN RIGHTS OF FIRST
REFUSAL AND  RESTRICTED IN  ACCORDANCE  WITH THE WARRANT  AGREEMENT  REFERRED TO
HEREIN.

         No. UD-01                                         130 Warrants

                       VOID AFTER 5:00 P.M. NEW YORK TIME
                              ON SEPTEMBER 12, 2004
                            VESSELS OIL & GAS COMPANY
                               WARRANT CERTIFICATE

         THIS  CERTIFIES  THAT  for  value  received  CHASE  MANHATTAN   CAPITAL
CORPORATION,  the registered holder hereof or registered assigns (the "Holder"),
is the owner of the number of Warrants set forth above,  each of which  entitles
the owner  thereof to  purchase  at any time from 9:00 A.M.,  New York time,  on
September 12, 1994,  until 5:00 P.M.,  New York time, on September 12, 2004, one
fully paid and nonassessable  share of the Common Stock (subject to adjustment),
par value $.10 per share (the "Common Stock"),  of Vessels Oil & Gas Company,  a
Colorado corporation (the "Company"), at the purchase price of $3,000 per share,
subject to  adjustment as described in the Warrant  Agreement  referred to below
(the  "Exercise  Price").  The Holder may pay the Exercise  Price in cash, or by
certified or official  bank check or by reduction of the  outstanding  principal
amount under the Facility, or make a net exercise for Warrant Stock as described
in the Warrant Agreement.

         This  Warrant  Certificate  is subject to, and entitled to the benefits
of, all of the terms,  provisions and conditions of an agreement dated September
12, 1994 (the "Warrant  Agreement")  between the Company and The Chase Manhattan
Bank, N.A., which Warrant Agreement is hereby  incorporated  herein by reference
and made a part hereof and to which Warrant  Agreement  reference is hereby made
for a full description of the rights, limitations of rights, obligations, duties
and  immunities  hereunder  of the  Company  and  the  Holders  of  the  Warrant
Certificates.  Copies  of the  Warrant  Agreement  are on file at the  principal
office of the Company.
                                       1
<PAGE>


         The Holder  hereof may be treated by the Company and all other  persons
dealing  with this  Warrant  Certificate  as the  absolute  owner hereof for any
purpose and as the person entitled to exercise the rights represented hereby, or
to the transfer  hereof on the books of the Company,  any notice to the contrary
notwithstanding,  and until such  transfer on such books,  the Company may treat
the Holder hereof as the owner for all purposes.

         This Warrant Certificate,  with or without other Warrant  Certificates,
upon  surrender at the  principal  office of the Company,  may be exchanged  for
another  Warrant  Certificate  or  Warrant  Certificates  of like tenor and date
evidencing  Warrants entitling the Holder to purchase a like aggregate number of
shares of Common Stock as the Warrants  evidenced by the Warrant  Certificate or
Warrant Certificates  surrendered  entitled to such Holder to purchase.  If this
Warrant  Certificate shall be exercised in part, the Holder shall be entitled to
receive  upon  surrender   hereof,   another  Warrant   Certificate  or  Warrant
Certificates for the number of whole Warrants not exercised.

         No  fractional  shares of Common Stock will be issued upon the exercise
of any Warrant or Warrants  evidenced hereby, but in lieu thereof a cash payment
will be made, as provided in the Warrant Agreement.

         Neither the Warrants nor the Warrant  Certificate  entitles any Warrant
Holder hereof to any of the rights of a shareholder of the Company.

         This Warrant  shall be deemed to be a contract  made under and shall be
construed in accordance  with and governed by the laws of the State of New York,
without giving effect to principles of conflicts of law.

         IN WITNESS WHEREOF,  Vessels Oil & Gas Company has caused the signature
of its Vice  President and Secretary to be printed hereon and its corporate seal
to be printed hereon.

                                              VESSELS OIL & GAS COMPANY

                                              By:
                                              Name:
                                              Title:
Attest:

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


                                       2
<PAGE>


                                                                 EXHIBIT 10.31


No. of Shares:  Fifty (50)

                            VESSELS OIL & GAS COMPANY

                          COMMON STOCK PURCHASE WARRANT

THIS WARRANT AND THE SHARES  PURCHASABLE  UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN  REGISTERED  UNDER  THE  SECURITIES  ACT OF  1933  AND  MAY  NOT  BE  SOLD,
TRANSFERRED  OR ASSIGNED  UNLESS  THERE IS AN EFFECTIVE  REGISTRATION  STATEMENT
UNDER SUCH ACT COVERING SUCH  SECURITIES  OR THE COMPANY  RECEIVES AN OPINION OF
COUNSEL  FOR THE  HOLDER OF THESE  SECURITIES  (REASONABLY  SATISFACTORY  TO THE
COMPANY AND ITS COUNSEL),  OR AN OPINION OF THE COMPANY'S  COUNSEL  STATING THAT
SUCH  SALE,  TRANSFER,  OR  ASSIGNMENT  IS  EXEMPT  FROM  THE  REGISTRATION  AND
PROSPECTUS DELIVERY REQUIREMENTS OF SUCH ACT AND ANY APPLICABLE STATE SECURITIES
LAWS.

         FOR VALUE  RECEIVED,  Associated  Energy  Managers,  Inc.,  a  Delaware
corporation  (the  "Holder"),  is entitled to  purchase  from  Vessels Oil & Gas
Company,  a  Colorado  corporation  (the  "Company"),  subject  to the terms and
conditions herein set forth, at any time before 5:00 p.m. Fairfield, Connecticut
time on December  30,  2000,  or, if such day is not a business  day,  the first
business day  thereafter  (the  "Expiration  Date") or such other date as may be
established  in  accordance  with the terms of this  Warrant,  Fifty (50) of the
shares of duly authorized,  validly issued,  fully paid and nonassessable Common
Stock of the  Company,  par value  ten cents  ($0.10)  per share  (the  "Warrant
Stock"),  subject to  adjustment  of the  number or kind of shares  constituting
Warrant Stock as  hereinafter  provided.  The Holder is entitled to purchase the
Warrant Stock for One Thousand  Three Hundred Fifty Dollars  ($1,350) per share,
subject to adjustment as  hereinafter  provided (the "Exercise  Price"),  and is
entitled also to exercise the other appurtenant  rights,  powers, and privileges
hereinafter set forth.

                             Article 1 Definitions.

         For  all  purposes  of  this  Warrant,  unless  the  context  otherwise
requires, the following terms have the following meanings:

         1.1 "Common  Stock" means the Company's  authorized  common stock,  par
value ten cents  ($0.10) per share.  "Common Stock  Equivalent"  has the meaning
ascribed to that term in Section 4.5(a).
 
                                      1
<PAGE>

         1.2 "Company" means Vessels Oil & Gas Company, a corporation  organized
and  existing  under  the  laws of the  State  of  Colorado,  and any  successor
corporation.

         1.3  "Exercise  Price" means the exercise  price for the Warrant  Stock
established in accordance with Article 4.

         1.4  "Existing  Stock" shall have the meaning  ascribed to that term in
Section 4.4 hereof. 

         1.5 "Expiration Date" means December 30, 2000, or, if such day is not a
business day, the first  business day  thereafter,  or such other date as may be
established in accordance with the terms of this Warrant.

         1.6 "Fair Market Value" in reference to the Common Stock means,  in the
event such stock is traded on a national  securities exchange or in the over the
counter  market as reported by the National  Association  of Securities  Dealers
Automated  Quotation System (stock being so traded or reported being referred to
herein as "Publicly Traded"), the average closing bid price of such stock on the
ten (10) trading days  immediately  preceding the date as of which such value is
to be  determined,  and in the  event  the  Common  Stock  is not so  traded  or
reported,  the value of such stock shall be  determined on the fair market value
of the Company either on (i) a going-concern basis, or (ii) a liquidation basis,
whichever  is higher,  both values to be  determined  by an  appraiser  mutually
acceptable to the Holder and the Company, the determination of such appraiser to
be final in the absence of fraud or bad faith.  If the  Company  has  registered
shares of Common  Stock for an  underwritten  public  distribution,  Fair Market
Value shall be the actual price per share at which shares are first offered upon
the  registration  statement  becoming  effective  or, if the event in  question
occurs upon the eve of the effective date, the suggested price per share. In the
event the Common Stock is not Publicly Traded, Fair Market Value in reference to
a share of the Common  Stock shall mean the Fair Market Value of the Company (as
defined in the previous  sentence)  allocable to the issued Common Stock divided
by the number of shares of Common Stock that would have been outstanding had (i)
this Warrant and that certain warrant to AEM dated December 16, 1993,  providing
for the purchase of 50 shares at an initial  Exercise Price of $3,000,  (ii) all
options to purchase  Common Stock,  and (iii) all  securities  convertible  into
Common  Stock at a price  per share no  greater  than Fair  Market  Value,  been
exercised or  converted  on the date as of which such value is to be  determined
(with appropriate adjustment by appraisal to reflect the proceeds of the assumed
exercise or conversion of  outstanding  securities).  As applicable to Warrants,
Fair Market Value shall mean the Fair Market  Value of the Common Stock  subject
to such  Warrants  minus the  Exercise  Price of such  Warrants  established  in
accordance with Article 4.

         1.7  "Holder"  means  Associated  Energy  Managers,  Inc.,  a  Delaware
corporation, and its successors or assigns as holder of this Warrant.

         1.8      "1933 Act" means the Securities Act of 1933, as amended.

                                       2
<PAGE>

         1.9 "Person" means any natural  person,  sole  proprietorship,  general
partnership,   limited  partnership,   joint  venture,   trust,   unincorporated
organization,  association,  corporation,  institution,  private or governmental
entity, or party.

         1.10     "Publicly Traded" has the meaning ascribed in Section 1.6.

         1.11  "Subscription  Notice"  means a written  notice to the Company of
Holder's  election  to exercise  its right under the Warrant to purchase  Common
Stock, in substantially the form of Exhibit A attached hereto.

         1.12  "Warrant"  means this  Warrant and any  Warrants  issued on or in
substitution for this Warrant.

         1.13  "Warrant  Stock"  means  the  shares  of  Common  Stock  or other
securities to be acquired upon the exercise of the Warrant.

                         Article 2 Exercise of Warrant.

         2.1 Partial  Exercise.  This  Warrant may be  exercised  in whole or in
part. In the event of a partial exercise,  the Company shall execute and deliver
to  the  Holder  (or  to  such  other  Person  as  shall  be  designated  in the
Subscription  Notice) a new  Warrant  covering  the  unexercised  portion of the
Warrant Stock.

         2.2  Procedure.  To exercise this Warrant,  the Holder shall deliver to
the Company at its principal office:

         (a) a written notice,  in  substantially  the form of the  Subscription
Notice, of the Holder's election to exercise this Warrant;

         (b) a check payable to the Company in the amount of the Exercise Price;
and

         (c) this Warrant.

The Company  shall as promptly as  practicable,  and in any event within  twenty
(20) days  after  receipt of such  notice,  execute  and  deliver or cause to be
executed and  delivered  one or more  certificates  representing  the  aggregate
number of shares of Warrant  Stock to which the Holder is entitled  and, if this
Warrant is exercised in part, a new Warrant as set forth in Section 2.1.

         2.3 Name and  Effective  Date.  The stock  certificate(s)  so delivered
shall  be  issued  in the  name of the  Holder  or such  other  name as shall be
designated in the notice specified in Section 2.2. Such certificate(s)  shall be
deemed to have been issued and such Holder or any other Person so  designated to

                                       3
<PAGE>

be named  therein  shall be deemed for all  purposes  to have become a Holder of
record of such shares as of the date the Company  actually  receives  the notice
specified in Section 2.2.

         2.4  Expenses.  The Company shall pay all  expenses,  taxes,  and other
charges payable in connection with the preparation,  issue, and delivery of such
stock  certificate(s),  except that, in case such stock  certificate(s) shall be
registered in a name or names other than the name of the Holder of this Warrant,
stock  transfer  taxes  that  are  payable  upon  the  issuance  of  such  stock
certificate(s) shall be paid by the Holder hereof.

         2.5 Legal  Requirements.  The Warrant Stock issued upon the exercise of
this Warrant shall be validly issued, fully paid, and nonassessable.

         2.6  No  Fractional  Shares.  The  Company  shall  not  issue  a  stock
certificate  representing  any  fraction of a share upon  partial  exercise by a
Holder of such Holder's rights hereunder.

         2.7 Cashless Exercise.  Notwithstanding  Section 2.2 of this Warrant or
any other provision of this Warrant to the contrary, the Company agrees that, in
addition to the Holder's  rights under this  Warrant,  the Holder may,  upon any
full or partial  exercise of this Warrant,  at its  election,  pay the aggregate
Exercise  Price  applicable to such  exercise by  delivering  the Warrant to the
Company and receiving  from the Company in return  therefor the number of shares
of Common Stock having a Fair Market Value on the date of exercise  equal to the
Fair Market Value of the Warrant as  established by the last sentence of Section
1.6.

         2.8 Lock Up  Agreement.  If  reasonably  requested  by the  underwriter
managing an initial  public  distribution  of the Company's  Common  Stock,  the
Holder shall execute the suggested agreement providing for a period of time (the
"Lock Up Period")  immediately  following  the  effective  date of the Company's
registration statement (which Lock Up Period shall not exceed the Lock Up Period
requested of other  significant  holders of the  Company's  Common Stock) during
which period the Holder will not sell its Warrant Stock into the public markets.
The  Holder's  undertaking  in this  regard  will not  extend to  Warrant  Stock
included in the registration statement,  whether pursuant to Section 9 hereof or
otherwise,  and  shall  lapse if the  aggregate  holdings  of  Endowment  Energy
Partners,  L.P., Endowment Energy Partners II, Limited  Partnership,  and Holder
shall fail to represent at least 5% of the Company's outstanding Common Stock.

                               Article 3 Transfer.

         3.1 Permitted  Transferees.  This Warrant shall be freely transferable,
in whole or in part, subject to the limitations specified in Section 3.2 herein,
and subject  also to the  Company's  right to  repurchase  the Warrant  Stock as
specified in Section 7.1 herein  ("Right of First  Refusal"),  if the  Company's
Stock is Publicly Traded.  If the Company's Stock is not Publicly  Traded,  this
Warrant shall be  transferable,  in whole or in part (subject to the limitations
specified  in Section 3.2 herein,  and subject  also to the  Company's  right to

                                       4
<PAGE>

repurchase  the Warrant  Stock as specified  in Section 7.1 herein),  only to an
Affiliate  (as that term is  defined  in Rule 405 under the 1933 Act) of Holder.
Pursuant to Sections 2.1 and 2.3 above, Holder may only designate as a recipient
of the  Warrant  Stock  Holder or a Person to whom  Holder  could  transfer  the
Warrant under this Section 3.1.

         3.2 Securities  Laws.  Neither this Warrant nor the Warrant Stock shall
be transferable unless:

         (a)  either a  registration  statement  under the 1933 Act is in effect
covering  the Warrant or the Warrant  Stock,  as the case may be, or the Company
has  received  an  opinion  from  Company   counsel  to  the  effect  that  such
registration  is not  required,  or the Holder has  furnished  to the Company an
opinion of Holder's counsel,  which counsel shall be reasonably  satisfactory to
the Company, to the effect that such registration is not required; and

         (b) the transfer complies with any applicable state securities laws.

In the event Holder seeks an opinion as to transfer  without  registration  from
Holder's counsel, the Company shall provide such factual information to Holder's
counsel as Holder's counsel may reasonably  request for the purpose of rendering
such opinion and such counsel may rely on the accuracy and  completeness of such
information in rendering such opinion.

         Upon  issuance,  the Warrant  Stock will bear a legend  describing  the
restrictions on transfer set forth in this Section 3.2.

         3.3 Procedure. The Holder may transfer this Warrant on the books of the
Company by surrendering to the Company:

         (a)      this Warrant;

         (b) a written assignment of this Warrant,  in substantially the form of
the Assignment  attached as Exhibit B hereto,  naming the assignee duly executed
by the Holder; and

         (c) funds  sufficient to pay any stock  transfer taxes payable upon the
making of such transfer.

The Company shall thereupon execute and deliver a new Warrant in the name of the
assignee  specified in such  instrument  of  assignment,  and if this Warrant is
transferred  in part,  the Company shall also execute and deliver in the name of
the Holder a new warrant covering the untransferred portion of the Warrant. Upon
issuance of the new Warrant or Warrants,  the Warrant  surrendered  for transfer
shall be cancelled by the Company.

                                       5
<PAGE>

         3.4  Expenses.  The Holder  shall pay all  expenses,  taxes (other than
transfer  taxes),  and other charges payable in connection with the preparation,
issue, and delivery of any new Warrant under this Article 3.

                                Article 4 Exercise Price and Adjustments.

         4.1 Initial  Exercise Price. The Initial Exercise Price for the Warrant
Stock shall be One Thousand Three Hundred Fifty Dollars ($1,350) per share.

         4.2 Stock Splits,  Stock Dividends and Reverse Stock Splits.  If at any
time the Company  shall  subdivide  (by  reclassification,  by the issuance of a
Common Stock dividend on Common Stock, or otherwise) its  outstanding  shares of
Common  Stock into a greater  number,  the number of shares of Common Stock that
may be purchased  hereunder shall be increased  proportionately and the Exercise
Price per share of Common  Stock shall be  decreased  proportionately  as of the
effective  date of such action.  The effective date of a stock dividend shall be
the date on which the dividend is declared.  Issuance of a Common Stock dividend
shall be treated as a subdivision  of the whole number of shares of Common Stock
outstanding  immediately  before the record date for such dividend into a number
of shares equal to such whole number of shares so outstanding plus the number of
shares issued as a stock dividend.  If at any time the Company shall combine (by
reclassification  or otherwise) its outstanding number of shares of Common Stock
into a lesser number, the number of shares of Common Stock that may be purchased
hereunder shall be reduced  proportionately  and the Exercise Price per share of
Common Stock shall be increased proportionately as of the effective date of such
action.

         4.3 Dividends Other than in Common Stock or Cash; Other  Distributions.
If at any time while this Warrant is  outstanding  the Company  shall declare or
make for the  benefit  of all  holders  of its  Common  Stock  any  dividend  or
distribution  upon its Common  Stock  other than  ordinary  cash  dividends,  or
distributions to which Section 4.2 or 4.4 apply (whether payable in stock of any
class or  classes  other  than its  Common  Stock or  payable  in  evidences  of
indebtedness  or assets or in rights,  options,  or warrants or  convertible  or
exchangeable securities),  then in each such case the number of shares of Common
Stock that may be purchased  hereunder  shall be determined by  multiplying  the
number of shares of Common Stock  theretofore  comprising the Warrant Stock by a
fraction, the numerator of which shall be the Fair Market Value per share of the
Common Stock determined in accordance with Section 1.6 as of the record date for
such dividend or  distribution  and the  denominator  of which shall be the Fair
Market Value per share,  as so determined,  less the fair value as of such date,
as  reasonably  determined  by the Board of  Directors  of the  Company,  of the
portion  of such  dividend  or  distribution  applicable  to one share of Common
Stock. Such adjustment shall be made whenever any such distribution is made, and
shall become  effective on the date of  distribution  retroactive  to the record
date for the determination of shareholders entitled to receive the distribution.
In the event the Company  determines  that the adjustment  provided for above is
unduly  difficult or expensive to effect because of  difficulties  of valuation,
the  Company  may,  at its  option  and  as an  alternative  to the  adjustment,
distribute  and place in escrow for the Holder that portion of such  dividend or

                                       6
<PAGE>

distribution  which the Holder would have received had it exercised this Warrant
before the declaration of the dividend or the making of the  distribution.  Upon
exercise of this Warrant,  the Holder shall receive its portion of the dividend,
distribution, or rights.

         4.4 Issuance on Common  Stock  Options,  Warrants or Rights.  If at any
time while this Warrant is outstanding the Company shall grant to all holders of
its Common  Stock any rights,  options or warrants  (referred to in this Section
4.4 as "Rights")  entitling  them to purchase  shares of Common Stock at a price
per share  which is lower at the  record  date for such  issuance  than the Fair
Market  Value of the Common Stock on such date  determined  in  accordance  with
Section  1.6,  the  number  of  Shares of  Common  Stock  that may be  purchased
hereunder  shall be  determined  by  multiplying  the number of Shares of Common
Stock  theretofore  purchasable  upon  exercise of each Warrant by a fraction of
which the numerator shall be the number of shares of Common Stock outstanding or
subject to issuance  at prices at or below the Fair  Market  Value of the Common
Stock on such  record  date (the  "Existing  Stock")  plus the  number of shares
offered pursuant to the Rights and of which the denominator  shall be the number
of shares of  Existing  Stock  plus the  number  of shares  which the  aggregate
offering price of the total number of shares of Common Stock offered pursuant to
the Rights  would  purchase at the then  current  Fair Market Value per share of
Common Stock.  Such  adjustment  shall be made whenever such rights,  options or
warrants are issued and shall become effective  retroactively  immediately after
the record date for the  determination of shareholders  entitled to receive such
rights,  options  or  warrants.  In the event the  Company  determines  that the
adjustment  provided for above in this Section is unduly  difficult or expensive
to effect because of difficulties  of valuation,  the Company may, at its option
and as an  alternative  to the  adjustment,  grant and convey to the Holder such
Rights which the Holder would have received had it exercised this Warrant before
issuance of the Rights.

         On the expiration or  termination  of any of the Rights,  the number of
shares of Common  Stock then  purchasable  upon the exercise of each Warrant and
the  exercise  price then in effect  shall be subject  to  readjustment  and the
number of shares of Common Stock  subject to the Warrants  shall  forthwith  the
decreased and the exercise price under the Warrants shall forthwith be increased
to that  which  would  have  been in effect  at the time of such  expiration  or
termination had such Rights, to the extent outstanding immediately prior to such
expiration or termination, never been issued.

         4.5 Anti-dilution Adjustment in Exercise Price. (a) In case the Company
shall at any time after the date of this  Warrant  issue for  consideration  any
shares of Common  Stock,  or any  securities  or other rights  convertible  into
Common Stock or entitled to receive Common Stock, or any other equity securities
entitled to  participate  with the Common Stock in the earnings or the assets of
the Company (but not any equity security  entitled to a fixed preference in such
earnings or assets rather than a participation  therein) (such other  securities
or rights herein called "Common Stock Equivalents"),  for a price per share less
than the Exercise  Price in effect  immediately  preceding  the issuance of such
additional  Common Stock or Common  Stock  Equivalents,  the  Exercise  Price in

                                       7
<PAGE>

effect  immediately  prior to the issuance of such  additional  shares or Common
Stock Equivalents shall forthwith be reduced to a price determined by dividing:

         (i) An  amount  equal to the sum of (x) the  total  number of shares of
Common  Stock  deemed  to be  outstanding  immediately  prior  to such  issuance
multiplied by the Exercise Price in effect  immediately  prior to such issuance,
(y) the total number of  additional  shares of Common Stock so multiplied by the
price per share,  if any, for which such shares are sold,  and (z) the aggregate
amount paid for the Common Stock  Equivalents so sold plus the aggregate  amount
subsequently  required  to  be  paid  under  the  terms  of  such  Common  Stock
Equivalents to acquire additional shares of Common Stock

by:

         (ii)  The  total  number  of  shares  of  Common  Stock  deemed  to  be
outstanding  immediately  after the issuance of such additional shares of Common
Stock or Common Stock Equivalents.

         (b) For  purposes of clauses  (i) and (ii) of  Subsection  4.5(a),  the
total number of shares of Common Stock deemed to be  outstanding  shall  include
that number of shares of Common Stock actually  outstanding  plus that number of
shares of Common  Stock then  issuable  under this  Warrant  plus that number of
shares of Common  Stock then  issuable  pursuant  to terms of the  Common  Stock
Equivalents at a price per share,  computed pursuant to Subsection 4.5(d),  that
is less than the Exercise Price.

         (c) For  purposes of this  Section  4.5,  the price per share for which
additional  shares of Common  Stock and Common Stock  Equivalents  are issued or
sold shall,  to the extent such price consists of cash, be computed on the basis
of the amount of cash  received by the Company  (and in the case of Common Stock
Equivalents,  such amount plus the amount of cash required to be paid to acquire
additional  shares of Common Stock),  after deduction of any expenses payable by
the  Company  and any  underwriting  or similar  commissions,  compensations  or
concessions  paid or allowed by the  Company  in  connection  with such issue or
sale. To the extent that the consideration for such additional shares and Common
Stock  Equivalents  is property or services  other than cash, the amount thereof
shall be the value received by or required to be paid to the Company as fixed in
good faith by the Board of Directors of the Company.

         (d) The  Exercise  Price  shall  never be  increased  pursuant  to this
Section 4.5 except as provided in this  Subsection  4.5(d) or Section 4.6 below.
Upon the expiration  unexercised of the  entitlement to receive shares of Common
Stock  under any  Common  Stock  Equivalents  the sale of which  resulted  in an
adjustment to the Exercise Price under this Section 4.5, then the Exercise Price
shall  thereupon  be  increased by the amount that the sale of such Common Stock
Equivalent caused the Exercise Price to be decreased  (subject to any applicable
adjustment  hereunder) and thereafter  adjustments  will be made to the Exercise
Price in accordance with this Section 4.5.

                                       8
<PAGE>

         (e) This Section 4.5 shall not apply to the Company's  preferred  stock
issued to  Endowment  Energy  Partners,  L.P.  ("EEP") and to  Endowment  Energy
Partners  II,  Limited  Partnership  ("EEP II"),  pursuant  to (i) that  certain
Amended and Restated Financing Agreement, dated May 16, 1993, as amended by that
certain  First  Amendment to Amended and  Restated  Financing  Agreement,  dated
December 16, 1993, by and between the Company and Vessels Gas  Processing,  Inc.
("VGP"),  as  borrower,  and EEP,  as lender,  and (ii) that  certain  Financing
Agreement,  dated  December  16,  1993,  by and  between the Company and VGP, as
borrower,  and Endowment Energy Co-Investment  Partnership,  as lender, of which
EEP and EEP II are general partners.

         4.6  Exercise  in   Connection   with  an  Initial   Public   Offering.
Notwithstanding  anything to the contrary  contained  herein,  the Holder agrees
that it shall,  upon  written  request  of the  Company,  exercise  the  Warrant
(whether  pursuant  to Section  2.2 or Section  2.7) in whole not later than the
business day prior to the day on which a registration  statement relating to the
initial  public  offering of securities of the Company is declared  effective by
the Securities and Exchange Commission;  provided,  however, that the obligation
to exercise the Warrant  pursuant to this  paragraph  4.6 shall be contingent on
the Company's entering into a Registration Rights Agreement substantially in the
form of Exhibit A attached hereto prior to Holder's exercise thereof.

         4.7  Reorganization  and  Reclassification.  In  case  of  any  capital
reorganization or any reclassification of the capital stock of the Company while
the Warrant remains  outstanding,  the Holder of the Warrant shall thereafter be
entitled to purchase  pursuant to the Warrant (in lieu of the kind and number of
shares of Common Stock comprising Warrant Stock that such Holder would have been
entitled to  purchase  or acquire  immediately  before  such  reorganization  or
reclassification) the kind and number of shares of stock of any class or classes
or other  securities  or property  for or into which such shares of Common Stock
would have been exchanged,  converted,  or reclassified if the Warrant Stock had
been purchased  immediately before such reorganization or  reclassification.  In
case of any such reorganization or reclassification,  appropriate  provision (as
determined by resolution of the Board of Directors of the Company) shall be made
with respect to the rights and interest thereafter of the Holder of the Warrant,
to the  end  that  all  the  provisions  of the  Warrant  (including  adjustment
provisions) shall thereafter be applicable, as nearly as reasonably practicable,
in relation to such stock or other securities or property.

         4.8 Statement of Adjustment  of Warrant  Stock.  Whenever the number or
kind of  shares  comprising  Warrant  Stock or the  Exercise  Price is  adjusted
pursuant to this Article 4, the Company shall promptly give notice to the Holder
of record of the outstanding  Warrant,  stating that such an adjustment has been
effected  and setting  forth the number and kind of shares  purchasable  and the
amount of the then-current  Exercise Price, and stating in reasonable detail the
facts requiring such adjustment and the calculation of such adjustment.

                                       9
<PAGE>

         4.9 No Other Adjustments. No adjustments in the number or kind or price
of shares  constituting  Warrant  Stock shall be made except as provided in this
Article 4.

                       Article 5 Covenants of the Company.

         The Company covenants and agrees that:

         5.1 At all times, the Company will reserve and set apart and have, free
from preemptive rights, a sufficient number of shares of authorized but unissued
Common Stock or other  securities,  if  applicable,  to enable it at any time to
fulfill all its obligations hereunder.

         5.2 Before  taking any action that would cause an  adjustment  reducing
the  Exercise  Price per share below the then par value of the shares of Warrant
Stock issuable upon exercise of the Warrant, the Company will take any corporate
action that may be  necessary  in order that the Company may validly and legally
issue fully paid and nonassessable shares of such Warrant Stock at such adjusted
price.

         5.3      In case the Company proposes:

         (a) to pay any dividend,  payable in stock (of any class or classes) or
in  convertible  securities,  upon its Common Stock or to make any  distribution
(other than ordinary cash dividends) to the holders of its Common Stock; or

         (b) to subdivide as a whole (by reclassification,  by the issuance of a
stock  dividend on Common Stock,  or  otherwise)  the number of shares of Common
Stock then outstanding into a greater number of shares of Common Stock,  with or
without par value; or

         (c) to grant to the holders of its Common Stock generally any rights or
options; or

         (d) to effect any capital reorganization or reclassification of capital
stock of the Company; or

         (e) to  consolidate  with,  or merge  into,  any other  corporation  or
business  or  transfer  its  property  as an  entirety  or  substantially  as an
entirety; or

         (f) to  effect  the  liquidation,  dissolution,  or  winding  up of the
Company; or

         (g) to make any other fundamental change in respect of which the Holder
of this Warrant  would have been entitled to vote,  pursuant to the  corporation
law of Colorado, if the Warrant had been previously exercised;  then the Company
shall  cause  notice of any such  intended  action to be given to the  Holder of
record of the  Warrant  (i) not less than  thirty  (30) days  before the date on

                                       10
<PAGE>

which the  transfer  books of the  Company  shall close or a record be taken for
such  stock  dividend,  distribution,  granting  of  rights or  options,  or for
determining rights to vote in respect of any fundamental  change,  including any
capital  reorganization,  reclassification,   consolidation,  merger,  transfer,
liquidation,  dissolution, winding up, or any other fundamental change, and (ii)
in the case of any such capital reorganization, reclassification, consolidation,
merger,  transfer,  liquidation,  dissolution,  winding up, or other fundamental
change not less than thirty (30) days before the same shall be effective.

              Article 6 Not Stockholders; Limitation of Liability.

         6.1 No provision of this Warrant shall be construed as conferring  upon
the Holder hereof the right to vote or to consent or to receive  dividends or to
receive notice as a stockholder in respect of meetings of  stockholders  for the
election  of  directors  of  the  Company  or any  other  matter  whatsoever  as
stockholders of the Company.  In the absence of affirmative action by the Holder
hereof to purchase shares of Common Stock,  no provision  hereof shall give rise
to any liability of such Holder for the purchase  price or as a  stockholder  of
the Company,  whether such  liability is asserted by the Company or by creditors
of the Company.

                        Article 7 Repurchase of Warrant.

         7.1 Right of First  Refusal.  In the event the Holder  demands that the
Warrant  Stock be registered  pursuant to Section 9.2 herein,  the Company shall
have the right to repurchase the Warrant for cash at its Fair Market Value as of
the date of the demand.  In the event the Holder  determines  to  transfer  this
Warrant pursuant to a bona fide offer to purchase the Warrant, the Company shall
have the right to  repurchase  the Warrant at the price of such bona fide offer.
The  Company  must  deliver  written  notice to the  Holder of its  election  to
repurchase the Warrant within  seventy-five (75) days after receipt of a request
by the Holder for  registration or receipt of notice by the Holder of its intent
to  accept a bona  fide  offer,  and such  notification  to the  Holder  must be
accompanied  by a  nonrefundable  cash  deposit  of the  lesser  of One  Hundred
Thousand  Dollars  ($100,000)  or the purchase  price of the Warrant  under this
Section 7.1. The Company shall deliver the balance of the purchase  price to the
Holder within sixty (60) days after delivery of its deposit. This right of first
refusal  shall not apply to any transfer to an  "affiliate"  (as defined in Rule
405 under the 1933 Act) of the Holder.

                    Article 8 Certain Mergers; Liquidations.

         8.1 Continuation of Warrant.  Except as provided in Section 8.2, in the
event that the Company  proposes to  consolidate  with, or merge into, any other
corporation  or  business  or  to  transfer  its  property  as  an  entirety  or
substantially  as an entirety,  or to effect the  liquidation,  dissolution,  or
winding up of the Company, then after the Company causes notice of such proposed
action to be given to the  Holder of record as  provided  in  Section  5.3,  the
Holder  shall be  entitled,  on or before  the  effective  date of such  merger,
consolidation, transfer, liquidation, dissolution, or winding up, to require the

                                       11
<PAGE>

Company  of the  successor  or  purchasing  entity,  as the case may be,  to (a)
execute  with the Holder an agreement  providing  that the Holder shall have the
right  thereafter and throughout the  then-remaining  term of the Warrant,  upon
payment of the exercise price per Warrant Share in effect  immediately  prior to
such action to purchase  with  respect to each share of Warrant  Stock  issuable
upon  exercise of this  Warrant the kind and amount of shares of stock and other
securities,  property  (including  cash) or any  combination  thereof  which the
Holder would have owned or have been  entitled to receive after the happening of
such consolidation,  merger, sale, or conveyance had this Warrant been exercised
with respect to such share of the Warrant Stock immediately prior to such action
and (b) make effective  provision in its Articles of Incorporation or otherwise,
if necessary,  in order to effect such  agreement.  Such agreement shall provide
for  adjustments  which  shall be as nearly  equivalent  as  practicable  to the
adjustments  in Article 4 of this  Warrant.  The  provisions of this Section 8.1
shall  similarly  apply  to  successive   consolidations,   mergers,  sales,  or
conveyances.

         8.2 Exception. Section 8.1 shall not apply to a consolidation or merger
with a company in which the Company is the surviving entity.

                         Article 9 Registration Rights.

         9.1  Piggyback  Registration  Rights.  If, at any time on or before the
expiration of the Warrant, the Company proposes to file a registration statement
for the public sale of any of its Common Stock or Common Stock  Equivalent under
the Securities Act of 1933, other than a registration  statement provided for in
Section 9.2 hereof,  the Company shall, not later than thirty (30) days prior to
the initial filing of the registration  statement,  deliver notice of its intent
to file such registration statement to the Holder, setting forth the minimum and
maximum proposed offering price,  commissions,  and discounts in connection with
the offering, and other relevant information.  Within twenty (20) days after the
receipt of notice of the Company's intent to file a registration statement,  the
Holder shall be entitled to request  that the Warrant  Stock be included in such
registration statement,  and the Company will use its best efforts to cause such
Warrant  Stock to be  included  in the  offering  covered  by such  registration
statement.  The Holder may transfer the Warrant to an  underwriter or broker for
exercise by such  underwriter or broker in connection with a distribution of the
Warrant Stock.  If officers or directors of the Company or persons  holding five
percent (5%) or more of any class of equity  securities  of the Company  request
inclusion  in such  underwriting,  the  Company  may offer to such  officers  or
directors that such other securities be included in the underwriting,  provided,
however,  that if the  underwriter  determines  that marketing  factors  require
limitation of the number of shares to be  underwritten,  or that the price would
be adversely affected by the addition of the securities  proposed to be added by
the officers or directors or security  holders,  the  securities  of the Company
held by the officers and directors  and security  holders of the Company and the
Warrant Stock shall be excluded from such  registration  and  underwriting  on a
pro-rata basis to the extent necessary to eliminate such adverse effect. Nothing
in this  Section  9.1 shall be  construed  as  giving  the  Holder  any right to
restrain, enjoin, or otherwise delay registration.

                                       12
<PAGE>

         9.2 Demand Registration Rights. The Holder shall be entitled to request
that the Warrant Stock be  registered  under the  Securities  Act of 1933 if the
Company  is  already  subject  to  periodic  reporting  requirements  under  the
regulations of the United States Securities and Exchange Commission.  As soon as
practicable  after receipt by the Company of a written request for registration,
the Company  shall obtain an  underwriter  satisfactory  to the Holder and shall
file,  and use its best  efforts to cause to become  effective,  an  appropriate
registration  statement under the 1933 Act covering the Warrant Stock,  provided
that  in  the  opinion  of  the  Company's  counsel,  no  events  preclude  such
registration.

         If a registration  requested pursuant to this Section 9.2 is to involve
an underwritten  public offering in which the obligation of the  underwriters is
to take all of the  shares to be sold if any are to be taken,  the  Company  and
other  holders of  securities  of the  Company may  include  securities  in such
registration only if the managing  underwriter of such public offering concludes
that such  inclusion will not adversely  affect the successful  marketing or the
price of the Warrant Stock to be included in such public offering.

         In the event  that the Holder  demands  registration  pursuant  to this
Section  9.2  within  the six  months  immediately  prior to  expiration  of the
Warrant,  and the Company,  through no fault of the Holder, is unable to provide
such  registration,  the expiration date of this Warrant shall be extended until
the thirtieth (30th) day after a registration statement for the Warrant Stock is
declared effective.

         The Holder's right to demand registration  pursuant to this Section 9.2
may be exercised  only one time prior to  expiration  of the Warrant;  provided,
however,  that the right shall not be deemed  exhausted  unless the registration
statement  covering so much of the  Warrant  Stock as the Holder and its assigns
wish to sell pursuant to the registration statement becomes effective.

         9.3  Filing  Obligations  of  the  Company.   In  connection  with  any
registration  of Warrant Stock  effected  under Sections 9.1 or 9.2, the Company
shall:

         (a) prepare and file the registration statement and such amendments and
supplements  to the  registration  statement  and  the  prospectus  or  offering
circular  used  in  connection  therewith  as  may  be  necessary  to  keep  the
registration  statement effective for a period of ninety (90) days and to comply
with the  provisions  of the 1933 Act and the rules and  regulations  thereunder
with respect to the disposition of all Warrant Stock covered by the registration
statement for the period required to effect the distribution  thereof, but in no
event  shall the  Company be  required to do so for a period of more than ninety
(90) days following the effective date of such registration statement;

         (b) furnish to the Holder such  number of copies of any  prospectus  or
offering  circular,   including  a  preliminary   prospectus,   and  of  a  full
registration  statement and exhibits in conformity with the  requirements of the
1933 Act and rules and  regulations  thereunder,  as the Holder  may  reasonably

                                       13
<PAGE>

request in order to facilitate the disposition of such securities;

         (c) use its best  efforts to  register  or qualify  the  Warrant  Stock
covered by the  registration  statement under the securities or blue sky laws of
such jurisdictions as the Holder may reasonably request,  and accomplish any and
all other acts and things  which may be necessary or advisable to permit sale in
such jurisdictions of such Warrant Stock;  provided,  however,  that the Company
shall  not be  required  to  register  as a dealer  or to  qualify  as a foreign
corporation  in any such  jurisdictions  or to escrow any shares of its  capital
stock.

         9.4 Expenses.  All expenses  incurred by the Company in connection with
any registration of Warrant Stock effected under Sections 9.1 or 9.2, including,
without  limitation,  all  registration  or filing  fees,  fees and  expenses of
complying with state securities and blue sky laws,  printing expenses,  fees and
expenses of the Company's  counsel and accountants and fees shall be paid by the
Company;  provided,   however,  that  all  underwriting  discounts  and  selling
commission applicable to the Warrant Stock shall not be borne by the Company but
shall be borne by the Holder.

         9.5      Indemnification.

         (a) By the Company.  In connection with the filing of any  registration
statements and sales of Warrant Stock  thereunder,  the Company shall  indemnify
and hold harmless the Holder of this Warrant,  any  underwriter,  and each other
Person, if any, who controls the Holder or the underwriter within the meaning of
the 1933 Act, against losses, claims,  damages or liabilities,  joint or several
(or  actions  in  respect  thereto)  ("Losses"),   to  which  any  such  Holder,
underwriter,  or  controlling  Person may become  subject  under the 1933 Act or
otherwise,  insofar  as such  Losses  arise out of or are based  upon any untrue
statement or alleged  untrue  statement of any  material  fact  contained in any
registration  statement under which Warrant Stock was registered  under the 1933
Act, any preliminary prospectus, offering circular or final prospectus contained
therein,  or any  amendment or  supplement  thereto,  or any report filed by the
Company  with  the  Securities   and  Exchange   Commission   (the   "Disclosure
Documents"),  or arise out of or are based upon the omission or alleged omission
to state therein a material  fact required to be stated  therein or necessary to
make the statements therein not misleading,  and will reimburse any such Holder,
underwriter,  or  controlling  Person  for  any  legal  or  any  other  expenses
reasonably  incurred in  connection  with  investigating  or defending  any such
claims,  excluding any amounts paid in settlement  of  litigation,  commenced or
threatened,  if such settlement is effected without the prior written consent of
the Company; provided, however, that the Company shall not be liable in any such
case to the  extent  that any such  Losses  arise out of or are  based  upon any
untrue statement,  alleged untrue statement or omission or alleged omission made
in such Disclosure  Document in reliance upon and in conformity with information
furnished  to the  Company  in  writing  by or on behalf  of the  Holder of this
Warrant  for  use  specifically  in  connection  with  the  preparation  of such
Disclosure Document.

                                       14
<PAGE>

         (b) By the Holder.  In connection  with the filing of any  registration
statement and sales of Warrant Stock thereunder,  the Holder shall indemnify the
Company,  each  of  its  directors,   each  of  its  officers  who  signed  such
registration statement,  and each other Person, if any, who controls the Company
within the meaning of the 1933 Act,  against any Losses to which the Company any
of its directors,  officers, or controlling Persons may become subject under the
1933 Act or otherwise, insofar as such Losses arise out of or are based upon any
untrue  statement or alleged untrue  statement of any material fact contained in
any of the  Disclosure  Documents or arise out of or are based upon the omission
or alleged  omission  to state  therein a material  fact  required  to be stated
therein or necessary to make the  statements  therein not  misleading,  and will
reimburse  the  Company,  and any of its  directors,  officers,  or  controlling
Persons for any legal or any other  expenses  reasonably  incurred in connection
with  investigating or defending any such claims,  excluding any amounts paid in
settlement  of  litigation,  commenced  or  threatened,  if such  settlement  is
effected  without the prior written  consent of the Holder;  provided,  however,
that such  indemnification  or  reimbursement  shall be payable in any such case
only to the extent  that such  statement  or alleged  statement  or  omission or
alleged omission is made in reliance on information  furnished to the Company in
writing by or on behalf of the Holder for use  specifically  in connection  with
the preparation of such Disclosure Document.

         9.6  Assignability.  The  rights of the Holder  under  this  Article 9,
except the right to request piggyback  registration or demand registration,  may
be assigned  by Holder to the full  extent  that the  Warrant  may be  assigned,
subject  to  assumption  by  the  assignee  of  the  corresponding   obligations
hereunder.

                            Article 10 Miscellaneous.

         10.1  Governing  Law.  The  rights of the  parties  arising  under this
Warrant shall be construed and enforced  under the laws of the State of Colorado
without giving effect to the doctrine of conflict of laws.

         10.2 Notices.  Any notice or other communication  required or permitted
to be given or delivered  pursuant to this Warrant shall be in writing and shall
be deemed given if delivered personally or by facsimile transmission (if receipt
is  confirmed  by the  facsimile  operator of the  recipient),  or  delivered by
overnight  courier  service or mailed by  registered  or certified  mail (return
receipt  requested),  postage prepaid, to the parties at the following addresses
(or at such other  address in the United  States of America for a party as shall
be specified by like notice; provided that notices of change of address shall be
effective only upon receipt thereof):


                                       15
<PAGE>


         (i)      to the Holder as follows:

                  Associated Energy Managers
                  1200 Converse Street, Suite 201
                  Longmeadow, MA  01106
                  Attn:  Robert Gershen
                  Facsimile No.: (413) 567-7926

                  Wilmer, Cutler & Pickering
                  2445 M Street, N.W.
                  Washington, D.C.  20037
                  Attn:  Russell J. Bruemmer
                  Facsimile No.: (202) 663-6363

         (ii)     to the Company as follows:

                  Vessels Oil & Gas Company
                  1050 Seventeenth St., Suite 2000
                  Denver, Colorado 80265
                  Attn:  Nicholas Aretakis/Richard Hartfield
                  Facsimile No.: (303) 825-2532

         10.3  Severability.  If any  provision  of this  Warrant  shall be held
invalid,  such  invalidity  shall not affect any other  provision of the Warrant
that can be given  effect  without the invalid  provision,  and to this end, the
provisions hereof are separable.

         10.4 Headings.  The headings in this Warrant are for reference purposes
only and  shall not  affect in any way the  meaning  or  interpretation  of this
Warrant.

         10.5 Amendment.  This Warrant cannot be amended or modified except by a
written agreement executed by the Company and the Holder.

         10.6 Assignment.  This Agreement shall be binding upon and inure to the
benefit  of  the   parties   hereto  and  their   respective   heirs,   personal
representatives,  successors  and  assigns  except  that no party may  assign or
transfer its rights or obligations under this Agreement to the extent explicitly
prohibited herein.

         10.7 Entire Agreement.  This Agreement,  together with its attachments,
contains the entire  understanding  among the parties hereto with respect to the
subject matter hereof and supersedes  all prior and  contemporaneous  agreements
and  understandings,  inducements  or  conditions,  express or implied,  oral or
written, except as herein contained.

         10.8 Registration of Warrant.  This Warrant and any subsequent  Warrant
executed and  delivered  by the Company  pursuant to a transfer by the Holder in

                                       16
<PAGE>

accordance  with  Article  3 shall be  registered  by the  Company  in a Warrant
Register as they are issued.

         IN WITNESS WHEREOF, the Company has caused this Warrant to be signed in
its name by its President or Vice President thereunto duly authorized.

Dated:  December 16, 1993


                            VESSELS OIL & GAS COMPANY



                            By:      /s/ T. J. Vessels
                            Name:  T. J. Vessels
                           Title:  President



                                       17
<PAGE>



                                                                  EXHIBIT 10.32


No. of Shares:  Fifty (50)

                            VESSELS OIL & GAS COMPANY

                          COMMON STOCK PURCHASE WARRANT

THIS WARRANT AND THE SHARES  PURCHASABLE  UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN  REGISTERED  UNDER  THE  SECURITIES  ACT OF  1933  AND  MAY  NOT  BE  SOLD,
TRANSFERRED  OR ASSIGNED  UNLESS  THERE IS AN EFFECTIVE  REGISTRATION  STATEMENT
UNDER SUCH ACT COVERING SUCH  SECURITIES  OR THE COMPANY  RECEIVES AN OPINION OF
COUNSEL  FOR THE  HOLDER OF THESE  SECURITIES  (REASONABLY  SATISFACTORY  TO THE
COMPANY AND ITS COUNSEL),  OR AN OPINION OF THE COMPANY'S COUNSEL,  STATING THAT
SUCH  SALE,  TRANSFER,  OR  ASSIGNMENT  IS  EXEMPT  FROM  THE  REGISTRATION  AND
PROSPECTUS DELIVERY  REQUIREMENTS OF SUCH ACT OF ANY APPLICABLE STATE SECURITIES
LAWS.

         FOR VALUE  RECEIVED,  Associated  Energy  Managers,  Inc.,  a  Delaware
corporation  (the  "Holder"),  is entitled to  purchase  from  Vessels Oil & Gas
Company,  a  Colorado  corporation  (the  "Company"),  subject  to the terms and
conditions herein set forth, at any time before 5:00 p.m. Fairfield, Connecticut
time on December  30,  2000,  or, if such day is not a business  day,  the first
business day  thereafter  (the  "Expiration  Date") or such other date as may be
established  in  accordance  with the terms of this  Warrant,  Fifty (50) of the
shares of duly authorized,  validly issued,  fully paid and nonassessable Common
Stock of the  Company,  par value  ten cents  ($0.10)  per share  (the  "Warrant
Stock"),  subject to  adjustment  of the  number or kind of shares  constituting
Warrant Stock as  hereinafter  provided.  The Holder is entitled to purchase the
Warrant  Stock for  Three  Thousand  Dollars  ($3,000)  per  share,  subject  to
adjustment as hereinafter  provided (the "Exercise Price"), and is entitled also
to exercise the other appurtenant rights, powers, and privileges hereinafter set
forth.

                                    ARTICLE 1

                                   DEFINITIONS

         For  all  purposes  of  this  Warrant,  unless  the  context  otherwise
requires, the following terms have the following meanings:

         1.1 "Common  Stock" means the Company's  authorized  common stock,  par
value ten cents  ($0.10) per share.  "Common Stock  Equivalent"  has the meaning
ascribed to that term is Section 4.5(a).

                                       1
<PAGE>

         1.2 "Company" means Vessels Oil & Gas Company, a corporation  organized
and  existing  under  the  laws of the  State  of  Colorado,  and any  successor
corporation.

         1.3 "Exercisable  Price" means the exercise price for the Warrant Stock
established in accordance with Article 4.

         1.4  "Existing  Stock" shall have the meaning  ascribed to that term in
Section 4.4 hereof. 

         1.5 "Expiration Date" means December 30, 2000, or, if such day is not a
business day, the first  business day  thereafter,  or such other date as may be
established in accordance with the terms of this Warrant.

         1.6 "Fair Market Value" in reference to the Common Stock means,  in the
event such stock is traded on a national  securities exchange or in the over the
counter  market as reported by the National  Association  of Securities  Dealers
Automated  Quotation System (stock being so traded or reported being referred to
herein as "Publicly Traded"), the average closing bid price of such stock on the
ten (10) trading days  immediately  preceding the date as of which such value is
to be  determined,  and in the  event  the  Common  Stock  is not so  traded  or
reported,  the value of such stock shall be  determined on the fair market value
of the Company either on (i) a going-concern basis, or (ii) a liquidation basis,
whichever  is higher,  both values to be  determined  by an  appraiser  mutually
acceptable to the Holder and the Company, the determination of such appraiser to
be final in the absence of fraud or bad faith.  If the  Company  has  registered
shares of Common  Stock for an  underwritten  public  distribution,  Fair Market
Value shall be the actual price per share at which shares are first offered upon
the  registration  statement  becoming  effective  or, if the event in  question
occurs upon the eve of the effective date, the suggested price per share. In the
event the Common Stock is not Publicly Traded, Fair Market Value in reference to
a share of the Common  Stock shall mean the Fair Market Value of the Company (as
defined in the previous sentence) allocable to the issued Common Stock divided b
the number of shares of Common  Stock that would have been  outstanding  had (i)
this Warrant and that certain Warrant to AEM dated December 16, 1993,  providing
for the purchase of 50 shares at an initial  Exercise Price of $1,350,  (ii) all
options to purchase  Common Stock,  and (iii) all  securities  convertible  into
Common  Stock at a price  per share no  greater  than Fair  Market  Value,  been
exercised or  converted  on the date as of which such value is to be  determined
with appropriate  adjustment by appraisal to reflect the proceeds of the assumed
exercise or conversion of  outstanding  securities).  As applicable to Warrants,
Fair Market Value shall mean the Fair Market  Value of the Common Stock  subject
to such  Warrants  minus the  Exercise  Price of such  Warrants  established  in
accordance with Article 4.

         1.7  "Holder"  means  Associated  Energy  Managers,  Inc.,  a  Delaware
corporation, and its successors or assigns as holder of this Warrant.

                                       2
<PAGE>

         1.8      "1933 Act" means the Securities Act of 1933, as amended.

         1.9 "Person" means any natural  person,  sole  proprietorship,  general
partnership,   limited  partnership,   joint  venture,   trust,   unincorporated
organization,  association,  corporation,  institution,  private  or  government
entity, or party.

         1.10     "Publicly Traded"  has the meaning ascribed in Section 1.6.

         1.11  "Subscription  Notice"  means a written  notice to the Company of
Holder's  election  to exercise  its right under the Warrant to purchase  Common
Stock, in substantially the form of Exhibit A attached hereto.

         1.12  "Warrant"  means this  Warrant and any  Warrants  issued on or in
substitution for this Warrant.

         1.13  "Warrant  Stock"  means  the  shares  of  Common  Stock  or other
securities to be acquired upon the exercise of the Warrant.

                                    ARTICLE 2

                               EXERCISE OF WARRANT


         2.1 Partial  Exercise.  This  Warrant may be  exercised  in whole or in
part. In the event of a partial exercise,  the Company shall execute and deliver
to  the  Holder  (or  to  such  other  Person  as  shall  be  designated  in the
Subscription  Notice) a new  Warrant  covering  the  unexercised  portion of the
Warrant Stock.

         2.2. Procedure.  To exercise this Warrant,  the Holder shall deliver to
the Company at its principal office:

                  (a)      a written notice,  in  substantially  the form of the
                           Subscription  Notice,  of the  Holder's  election  to
                           exercise this Warrant;

                  (b)      a check  payable to the  Company in the amount of the
                           Exercise Price; and

                  (c)      this Warrant.

The Company  shall as promptly as  practicable,  and in any event within  twenty
(20) days  after  receipt of such  notice,  execute  and  deliver or cause to be
executed and  delivered  one or more  certificates  representing  the  aggregate
number of shares of Warrant  Stock to which the Holder is entitled  and, if this
Warrant is exercised in part, a new Warrant as set forth in Section 2.1.

                                       3
<PAGE>

         2.3 Name and  Effective  Date.  The stock  certificate(s)  so delivered
shall  be  issued  in the  name of the  Holder  or such  other  name as shall be
designated in the notice specified n Section 2.2. Such  certificate(s)  shall be
deemed to have been issued and such Holder or any other Person so  designated to
be named  therein  shall be deemed for all  purposes  to have become a Holder of
record of such shares as of the date the Company  actually  receives  the notice
specified in Section 2.2.

         2.4  Expenses.  The Company shall pay all  expenses,  taxes,  and other
charges payable in connection with the preparation,  issue, and delivery of such
stock  certificate(s),  except that, in case such stock  certificate(s) shall be
registered in a name or names other than the name of the Holder of this Warrant,
stock  transfer  taxes  that  are  payable  upon  the  issuance  of  such  stock
certificate(s) shall be paid by the Holder hereof.

         2.5 Legal  Requirements.  The Warrant Stock issued upon the exercise of
this Warrant shall be validly issued, fully paid, and nonassessable.

         2.6  No  Fractional  Shares.  The  Company  shall  not  issue  a  stock
certificate  representing  any  fraction of a share upon  partial  exercise by a
Holder of such Holder's rights hereunder.

         2.7 Cashless Exercise.  Notwithstanding  Section 2.2 of this Warrant or
any other provision of this Warrant to the contrary, the Company agrees that, in
addition to the Holder's  rights under this  warrant,  the Holder may,  upon any
full or partial  exercise of this warrant,  at its  election,  pay the aggregate
Exercise  Price  applicable to such  exercise by  delivering  the Warrant to the
Company and receiving  from the Company in return  therefor the number of shares
of Common Stock having a Fair Market Value on the date of exercise  equal to the
Fair Market Value of the Warrant as  established by the last sentence of Section
1.6.

         2.8 Lock Up  Agreement.  If  reasonably  requested  by the  underwriter
managing an initial  public  distribution  of the Company's  Common  Stock,  the
Holder shall execute the suggested agreement providing for a period of time (the
"Lock Up Period")  immediately  following  the  effective  date of the Company's
registration statement (which Lock Up Period shall not exceed the Lock Up Period
requested of other  significant  holders of the  Company's  Common Stock) during
which period the Holder will not sell its Warrant Stock into the public markets.
The  Holder's  undertaking  in this  regard  will not  extend to  Warrant  Stock
included in the registration statement,  whether pursuant to Section 9 hereof or
otherwise,  and  shall  lapse if the  aggregate  holdings  of  Endowment  Energy
Partners,  L.P., Endowment Energy Partners, II, Limited Partnership,  and Holder
shall fail to represent at least 5% of the Company's outstanding Common Stock.

                                    ARTICLE 3

                                    TRANSFER

                                       4
<PAGE>

         3.1 Permitted  Transferees.  This Warrant shall be freely transferable,
in whole or in part, subject to the limitations specified in Section 3.2 herein,
and subject  also to the  Company's  right to  repurchase  the Warrant  Stock as
specified in Section 7.1 herein  ("Right of First  Refusal"),  if the  Company's
Stock is Publicly Traded.  If the Company's Stock is not Publicly  Traded,  this
Warrant shall be  transferable,  in whole or in part (subject to the limitations
specified  in Section 3.2 herein,  and subject  also to the  Company's  right to
repurchase  the Warrant  Stock as specified  in Section 7.1 herein),  only to an
Affiliate  (as that term is  defined  in Rule 405 under the 1933 Act) of Holder.
Pursuant to Sections 2.1 and 2.3 above, Holder may only designate as a recipient
of the  Warrant  Stock  Holder or a Person to whom  Holder  could  transfer  the
Warrant under this Section 3.1.

         3.2 Securities  Laws.  Neither this Warrant nor the Warrant Stock shall
be transferable unless:

         (a)  either a  registration  statement  under the 1933 Act is in effect
covering  the Warrant or the Warrant  Stock,  as the case may be, or the Company
has  received  an  opinion  from  Company   counsel  to  the  effect  that  such
registration  is not  required,  or the Holder has  furnished  to the Company an
opinion of Holder's counsel,  which counsel shall be reasonably  satisfactory to
the Company, to the effect that such registration is not required; and

         (b) the transfer complies with any applicable state securities laws.

In the event Holder seeks an opinion as to transfer  without  registration  from
Holder's counsel, the Company shall provide such factual information to Holder's
counsel as Holder's counsel may reasonably  request for the purpose of rendering
such opinion and such counsel may rely on the accuracy and  completeness of such
information in rendering such opinion.

         Upon  issuance,  the Warrant  Stock will bear a legend  describing  the
restrictions on transfer set forth in this Section 3.2.

         3.3 Procedure. The Holder may transfer this Warrant on the books of the
Company by surrendering to the Company:

                      (a)   this Warrant;

                  (b)      a   written   assignment   of   this   Warrant,    in
                           substantially the form of the Assignment  attached as
                           Exhibit B hereto,  naming the assignee  duly executed
                           by the Holder; and

                                       5
<PAGE>

                  (c)      funds  sufficient  to pay any  stock  transfer  taxes
                           payable upon the making of such transfer.

The Company shall thereupon execute and deliver a new Warrant to the name of the
assignee  specified in such  instrument  of  assignment,  and if this Warrant is
transferred  in part,  the Company shall also execute and deliver in the name of
the Holder a new warrant  covering the  untransferred  portion of this  Warrant.
Upon  issuance  of the new Warrant or  Warrants,  the  Warrant  surrendered  for
transfer shall be cancelled by the Company.

         3.4  Expenses.  The Holder  shall pay all  expenses,  taxes (other than
transfer  taxes),  and other charges payable in connection with the preparation,
issue, and delivery of any new Warrant under this Article 3.

                                    ARTICLE 4

                         EXERCISE PRICE AND ADJUSTMENTS

         4.1 Initial  Exercise Price. The Initial Exercise Price for the Warrant
Stock shall be Three Thousand Dollars ($3,000) per share.

         4.2 Stock Splits,  Stock Dividends and Reverse Stock Splits.  If at any
time the Company  shall  subdivide  (by  reclassification,  by the issuance of a
Common Stock dividend on Common Stock, or otherwise) its  outstanding  shares of
Common  Stock into a greater  number,  the number of shares of Common Stock that
may be purchased  hereunder shall be increased  proportionately and the Exercise
Price per share of Common  Stock shall be  decreased  proportionately  as of the
effective  date of such action.  The effective date of a stock dividend shall be
the date on which the dividend is declared.  Issuance of a Common Stock dividend
shall be treated as a subdivision  of the whole number of shares of Common Stock
outstanding  immediately  before the record date for such dividend into a number
of shares equal to such whole number of shares so outstanding plus the number of
shares issued as a stock dividend.  If at any time the Company shall combine (by
reclassification  or otherwise) its outstanding number of shares of Common Stock
into lesser  number,  the number of shares of Common Stock that may be purchased
hereunder shall be reduced  proportionately  and the Exercise Price per share of
Common Stock shall be increased proportionately as of the effective date of such
action.

         4.3 Dividends Other than in Common Stock or Cash; Other  Distributions.
If at any time while this Warrant is  outstanding  the Company  shall declare or
make for the  benefit  of all  holders  of its  Common  Stock  any  dividend  or
distribution  upon its Common  Stock  other than  ordinary  cash  dividends,  or
distributions to which Section 4.2 or 4.4 apply (whether payable in stock of any
class or  classes  other  than its  Common  Stock or  payable  in  evidences  of
indebtedness  or assets or in rights,  options,  or warrants or  convertible  or
exchangeable securities),  then in each such case the number of shares of Common
Stock that may be purchased  hereunder  shall be determined by  multiplying  the
number of shares of Common Stock  theretofore  comprising the Warrant Stock by a

                                       6
<PAGE>

fraction, the numerator of which shall be the Fair Market Value per share of the
Common Stock determined in accordance with Section 1.6 as of the record date for
such dividend or  distribution  and the  denominator  of which shall be the Fair
Market Value per share,  as so determined,  less the fair value as of such date,
as  reasonably  determined  by the Board of  Directors  of the  Company,  of the
portion  of such  dividend  or  distribution  applicable  to one share of Common
Stock. Such adjustment shall be made whenever any such distribution is made, and
shall become  effective on the date of  distribution  retroactive  to the record
date for the determination of shareholders entitled to receive the distribution.
In the event the Company  determines  that the adjustment  provided for above is
unduly  difficult or expensive to effect because of difficulties  off valuation,
the  Company  may,  at its  option  and  as an  alternative  to the  adjustment,
distribute  and place in escrow for the Holder that portion of such  dividend or
distribution  which the Holder would have received had it exercised this Warrant
before the declaration of the dividend or the making of the  distribution.  Upon
exercise of this Warrant,  the Holder shall receive its portion of the dividend,
distribution, or rights.

         4.4 Issuance on Common Stock of Options,  Warrants or Rights. If at any
time while this Warrant is outstanding the Company shall grant to all holders of
its Common  Stock any rights,  options or warrants  (referred to in this Section
4.4 as "Rights")  entitling  them to purchase  shares of Common Stock at a price
per share  which is lower at the  record  date for such  issuance  than the Fair
Market  Value of the Common Stock on such date  determined  in  accordance  with
Section  1.6,  the  number  of  Shares of  Common  Stock  that may be  purchased
hereunder  shall be  determined  by  multiplying  the number of Shares of Common
Stock  theretofore  purchasable  upon  exercise of each Warrant by a fraction of
which the numerator shall be the number of shares of Common Stock outstanding or
subject to issuance  at prices at or below the Fair  Market  Value of the Common
Stock on such  record  date (the  "Existing  Stock")  plus the  number of shares
offered pursuant to the Rights and of which the denominator  shall be the number
of shares of  Existing  Stock  plus the  number  of shares  which the  aggregate
offering price of the total number of shares of Common Stock offered pursuant to
the Rights  would  purchase at the then  current  Fair Market Value per share of
Common Stock.  Such  adjustment  shall be made whenever such rights,  options or
warrants are issued and shall become effective  retroactively  immediately after
the record date for the  determination of shareholders  entitled to receive such
rights  options  or  warrants.  In the event  the  Company  determines  that the
adjustment  provided for above in this Section is unduly  difficult or expensive
to effect because of difficulties  of valuation,  the Company may, at its option
and as an  alternative  to the  adjustment,  grant and convey to the Holder such
Rights which the Holder would have received had it exercised this Warrant before
issuance of the Rights.

         On the expiration or  termination  of any of the Rights,  the number of
shares of Common  Stock then  purchasable  upon the exercise of each Warrant and
the  exercise  price then in effect  shall be subject  to  readjustment  and the
number of shares of Common  Stock  subject to the  Warrants  shall  forthwith be
decreased and the exercise price under the Warrants shall forthwith be increased
to that  which  would  have  been in effect  at the time of such  expiration  or

                                       7
<PAGE>

termination had such Rights, to the extent outstanding immediately prior to such
expiration or termination, never been issued.

         4.5      Anti-dilution Adjustment in Exercise Price.

         (a) In case the Company shall at any time after the date of the date of
this  Warrant  issue  for  consideration  any  shares of  Common  Stock,  or any
securities or other rights  convertible into Common Stock or entitled to receive
Common Stock, or any other equity  securities  entitled to participate  with the
Common  Stock in the  earnings or the assets of the Company  (but not any equity
security entitled to a fixed preference in such earnings or assets rather than a
participation  therein)  (such other  securities or rights herein called "Common
Stock  Equivalents"),  for a price per share  less  than the  Exercise  Price in
effect  immediately  preceding the issuance of such  additional  Common Stock or
Common Stock Equivalents,  the Exercise Price in effect immediately prior to the
issuance of such additional  shares or Common Stock  Equivalents shall forthwith
be reduced to a price determined by dividing:

                  (i) an  amount  equal to the sum of (x) the  total  number  of
shares  of  Common  Stock  deemed to be  outstanding  immediately  prior to such
issuance  multiplied by the Exercise Price in effect  immediately  prior to such
issuance,  (y) the  total  number  of  additional  shares  of  Common  Stock  so
multiplied by the price per share,  if any, for which such shares are sold,  and
(z) the aggregate amount paid for the Common Stock  Equivalents so sold plus the
aggregate amount  subsequent  required to be paid under the terms of such Common
Stock Equivalents to acquire additional shares of Common Stock

by:

                  (ii) The total  number of shares of Common  Stock deemed to be
outstanding  immediately  after the issuance of such additional shares of Common
Stock or Common Stock Equivalents.

         (b) For  purposes of clauses  (i) and (ii) of  Subsection  4.5(a),  the
total number of shares of Common Stock deemed to be  outstanding  shall  include
that number of shares of Common Stock actually  outstanding  plus that number of
shares of Common  Stock then  issuable  pursuant  to terms of the  Common  Stock
Equivalents at a price per share,  computed pursuant to Subsection 4.5(d),  that
is less than the Exercise Price.

         (c) For purposes of this  Subsection 4.5, the price per share for which
additional  shares of Common  Stock and Common Stock  Equivalents  are issued or
sold shall,  to the extent such price consists of cash, be computed on the basis
of the amount of cash  received by the Company  (and in the case of Common Stock
Equivalents,  such amount plus the amount of cash required to be paid to acquire
additional  shares of Common Stock),  after deduction of any expenses payable by
the  Company  and any  underwriting  or similar  commissions,  compensations  or
concessions  paid or allowed by the  Company  in  connection  with such issue or
sale. To the extent that the consideration for such additional shares and Common

                                       8
<PAGE>

Stock  Equivalents  is property or services  other than cash, the amount thereof
shall be the value received by or required to be paid to the Company as fixed in
good faith by the Board of Directors of the Company.

         (d) The  Exercise  Price  shall  never be  increased  pursuant  to this
Section 4.5 except as provided in this  Subsection  4.5(d) or Section 4.6 below.
Upon the expiration  unexercised of the  entitlement to receive shares of Common
Stock  under any  Common  Stock  Equivalents  the sale of which  resulted  in an
adjustment to the Exercise Price under this Section 4.5, then the Exercise Price
shall  thereupon  be  increased by the amount that the sale of such Common Stock
Equivalent caused the Exercise Price to be decreased  (subject to any applicable
adjustment  hereunder) and thereafter  adjustments  will be made to the Exercise
Price in accordance with this Section 4.5.

         (e) This Section 4.5 shall not apply to the Company's  preferred  stock
issued to  Endowment  Energy  Partners,  L.P.  ("EEP") and to  Endowment  Energy
Partners  II,  Limited  Partnership  ("EEP II"),  pursuant  to (i) that  certain
Amended and Restated Financing Agreement, dated May 16, 1993, as amended by that
certain  First  Amendment to Amended and  Restated  Financing  Agreement,  dated
December 16, 1993, by and between the Company and Vessels Gas  Processing,  Inc.
("VGP"),  as  borrower,  and EEP,  as lender,  and (ii) that  certain  Financing
Agreement,  dated  December  16,  1993,  by and  between the Company and VGP, as
borrower,  and Endowment Energy Co-Investment  Partnership,  as lender, of which
EEP and EEP II are general partners.

                  4.6 Exercise in Connection  with an Initial  Public  Offering.
Notwithstanding  anything in the contrary  contained  herein,  the Holder agrees
that it shall,  upon  written  request  of the  Company,  exercise  the  Warrant
(whether  pursuant  to Section  2.2 or Section  2.7) in whole not later than the
business day prior to the day on which a registration  statement relating to the
initial  public  offering of securities of the Company is declared  effective by
the Securities and Exchange Commission;  provided,  however, that the obligation
to exercise the Warrant  pursuant to this  paragraph  4.6 shall be contingent on
the Company's entering into a Registration Rights Agreement substantially in the
form of Exhibit A attached hereto prior to Holder's exercise thereof.

                  4.7  Reorganization  and  Reclassification.  In  case  of  any
capital  reorganization  or any  reclassification  of the  capital  stock of the
Company while the Warrant remains  outstanding,  the Holder of the Warrant shall
thereafter be entitled to purchase  pursuant to the Warrant (in lieu of the kind
and number of shares of Common Stock  comprising  Warrant Stock that such Holder
would  have been  entitled  to  purchase  or  acquire  immediately  before  such
reorganization  or  reclassification)  the kind and number of shares of stock of
any class or  classes or other  securities  or  property  for or into which such
shares of Common Stock would have been exchanged,  converted, or reclassified if
the Warrant Stock had been purchased  immediately before such  reorganization or
reclassification.  In  case  of any  such  reorganization  or  reclassification,
appropriate  provision (as determined by resolution of the Board of Directors of
the Company) shall be made with respect to the rights and interest thereafter of
the Holder of the Warrant,  to the end that all the  provisions  of the Warranty

                                       9
<PAGE>

(including adjustment  provisions) shall thereafter be applicable,  as nearly as
reasonably  practicable,  in  relation  to such  stock  or other  securities  or
property.

                  4.8  Statement of Adjustment  of Warrant  Stock.  Whenever the
number or kind or  shares  comprising  Warrant  Stock or the  Exercise  Price is
adjusted  pursuant to this Article 4, the Company shall  promptly give notice to
the Holder of record of the outstanding Warrant, stating that such an adjustment
has been  effected and setting  forth the number and kind of shares  purchasable
and the amount of the  then-current  Exercise  Price,  and stating in reasonable
detail  the  facts  requiring  such  adjustment  and  the  calculation  of  such
adjustment.

                  4.9. No other  Adjustments.  No  adjustments  in the number or
kind or price of  shares  constituting  Warrant  Stock  shall be made  except as
provided in this Article 4.


                                       10
<PAGE>


                                    ARTICLE 5

                            COVENANTS OF THE COMPANY

                  The Company covenants and agrees that:

                  5.1 At all times,  the Company  will reserve and set apart and
have, free from preemptive  rights, a sufficient  number of shares of authorized
but unissued Common Stock or other  securities,  if applicable,  to enable it at
any time to fulfill all its obligations hereunder.

                  5.2 Before  taking any action that would  cause an  adjustment
reducing the Exercise  Price per share below the then par value of the shares of
Warrant Stock  issuable upon exercise of the Warrant,  the Company will take any
corporate action that may be necessary in order that the Company may validly and
legally issue fully paid and  nonassessble  shares of such Warrant Stock at such
adjusted price.

                  5.3      In case the Company proposes:

                  (a) to pay any  dividend,  payable  in stock  (of any class or
classes)  or in  convertible  securities,  upon its Common  Stock or to make any
distribution  (other than ordinary cash  dividends) to the holders of its Common
Stock; or

                  (b) to  subdivide  as a  whole  (by  reclassification,  by the
issuance of a stock dividend on Common Stock, or otherwise) the number of shares
of Common  Stock  then  outstanding  into a  greater  number of shares of Common
Stock, with or without par value; or

                  (c) to grant to the holders of its Common Stock  generally any
rights or options; or

                  (d) to effect any capital  reorganization or  reclassification
of capital stock of the Company or

                  (e) to consolidate  with, or merge into, any other corporation
or  business  or  transfer  its  property  as an entity or  substantially  as an
entirety; or

                  (f) to effect the liquidation,  dissolution,  or winding up of
the Company; or

                  (g) to make any other  fundamental  change in respect of which
the Holder of this  Warrant  would have been  entitled to vote,  pursuant to the
corporation law of Colorado, if the Warrant had been previously exercised;  then
the Company  shall cause notice of any such  intended  action to be given to the
Holder of record of the  Warrant  (i) not less than  thirty (30) days before the

                                       11
<PAGE>

date on which the transfer books of the Company shall close or a record be taken
for such stock  dividend,  distribution,  granting of rights or options,  or for
determining rights to vote in respect of any fundamental  change,  including any
capital  reorganization,  reclassification,   consolidation,  merger,  transfer,
liquidation,  dissolution, winding up, or any other fundamental change, and (ii)
in the case of any such capital reorganization, reclassification, consolidation,
merger,  transfer,  liquidation,  dissolution,  winding up, or other fundamental
change not less than thirty (30) days before the same shall be effective.

                                    ARTICLE 6

                    NOT STOCKHOLDERS; LIMITATION OF LIABILITY

                  6.1 No  provision  of this  Warranty  shall  be  construed  as
conferring  upon the Holder hereof the right to vote or to consent or to receive
dividends  or to receive  notice as a  stockholder  in respect  of  meetings  of
stockholders  for the  election of  directors of the Company or any other matter
whatsoever as stockholders of the Company.  In the absence of affirmative action
by the Holder  hereof to purchase  shares of Common Stock,  no provision  hereof
shall give rise to any  liability of such Holder for the purchase  price or as a
stockholder of the Company, whether such liability is asserted by the Company or
by creditors of the Company.

                                    ARTICLE 7

                              REPURCHASE OF WARRANT

                  7.1 Right of First  Refusal.  In the event the Holder  demands
that the Warrant Stock be registered pursuant to Section 9.2 herein, the Company
shall have the right to repurchase the Warrant for cash at its Fair Market Value
as of the date of the  demand.  In the event the Holder  determines  to transfer
this Warrant pursuant to a bona fide offer to purchase the Warrant,  the Company
shall have the right to  repurchase  the  Warrant at the price of such bona fide
offer.  The Company must deliver written notice to the Holder of its election to
repurchase the Warrant within  seventy-five (75) days after receipt of a request
by the Holder for  registration or receipt of notice by the Holder of its intent
to  accept a bona  fide  offer,  and such  notification  to the  Holder  must be
accompanied  by a  nonrefundable  cash  deposit  of the  lesser  of One  Hundred
Thousand  Dollars  ($100,00)  or the  purchase  price of the Warrant  under this
Section 7.1. The Company shall deliver the balance of the purchase  price to the
Holder within sixty (60) days after delivery of its deposit. This right of first
refusal  shall not apply to any transfer to an  "affiliate"  (as defined in Rule
405 under the 1933 Act) of the Holder.

                                    ARTICLE 8

                          CERTAIN MERGERS; LIQUIDATIONS

                                       12
<PAGE>

                  8.1  Continuation  of  Warrant.  Except as provided in Section
8.2, in the event that the Company proposes to consolidate  with, or merge into,
any other  corporation or business or to transfer its property as an entirety or
substantially  as an entirety,  or to effect the  liquidation,  dissolution,  or
winding up of the Company, then after the Company causes notice of such proposed
action to be given to the  Holder of record as  provided  in  Section  5.3,  the
Holder  shall be  entitled,  on or before  the  effective  date of such  merger,
consolidation, transfer, liquidation, dissolution, or winding up, to require the
Company  of the  successor  or  purchasing  entity,  as the case may be,  to (a)
execute  with the Holder an agreement  providing  that the Holder shall have the
right  thereafter and throughout the  then-remaining  term of the Warrant,  upon
payment of the exercise price per Warrant Share in effect  immediately  prior to
such action to purchase  with  respect to each share of Warrant  Stock  issuable
upon  exercise of this  Warrant the kind and amount of shares of stock and other
securities,  property  (including  cash) or any  combination  thereof  which the
Holder would have owned or have been  entitled to receive after the happening of
such consolidation,  merger, sale, or conveyance had this Warrant been exercised
with respect to such share of the Warrant Stock immediately prior to such action
and (b) make effective  provision in its Articles of Incorporation or otherwise,
if necessary,  in order to effect such  agreement.  Such agreement shall provide
for  adjustments  which  shall be as nearly  equivalent  as  practicable  to the
adjustments  in Article 4 of this  Warrant.  The  provisions of this Section 8.1
shall  similarly  apply  to  successive   consolidations,   mergers,  sales,  or
conveyances.

                  8.2 Exception.  Section 8.1 shall not apply to a consolidation
or merger with a company in which the Company is the surviving entity.

                                    ARTICLE 9

                               REGISTRATION RIGHTS

                  9.1  Piggyback  Registration  Rights.  If,  at any  time on or
before  the  expiration  of  the  Warrant,   the  Company  proposes  to  file  a
registration statement for the public sale of any of its Common Stock Equivalent
under the Securities Act of 1933, other than a registration  statement  provided
for in Section 9.2 hereof,  the Company  shall,  not later than thirty (30) days
prior to the initial filing of the registration statement, deliver notice of its
intent to file such  registration  statement  to the Holder,  setting  forth the
minimum and maximum  proposed  offering  price,  commissions,  and  discounts in
connection with the offering, and other relevant information. Within twenty (20)
days after  receipt  of notice of the  Company's  intent to file a  registration
statement,  the Holder  shall be entitled to request  that the Warrant  Stock be
included  in such  registration  statement,  and the  Company  will use its best
efforts to cause such Warrant  Stock to be included in the  offering  covered by
such  registration  statement.  The  Holder  may  transfer  the  Warrant  to  an
underwriter  or broker for exercise by such  underwrite  or broker in connection
with a  distribution  of the Warrant  Stock.  If officers  or  directors  of the
Company  or persons  holding  five  percent  (5%) or more of any class of equity
securities of the Company request  inclusion in such  underwriting,  the Company

                                       13
<PAGE>

may offer to such officers or directors  that such other  securities be included
in the underwriting,  provided, however, that if the underwriter determines that
marketing factors require limitation of the number of shares to be underwritten,
or that the price would be adversely  affected by the addition of the securities
proposed to be added by the  officers or  directors  or  security  holders,  the
securities  of the Company  held by the  officers  and  directors  and  security
holders  of the  Company  and the  Warrant  Stock  shall be  excluded  from such
registration  and  underwriting  on a pro-rata basis to the extent  necessary to
eliminate such adverse effect. Nothing in this Section 9.1 shall be construed as
giving  the  Holder  any  right  to  restrain,   enjoin,   or  otherwise   delay
registration.

         9.2 Demand Registration Rights. The Holder shall be entitled to request
that the Warrant Stock be  registered  under the  Securities  Act of 1933 if the
Company  is  already  subject  to  periodic  reporting  requirements  under  the
regulations of the United States Securities and Exchange Commission.  As soon as
practicable  after receipt by the Company of a written request for registration,
the Company  shall obtain an  underwriter  satisfactory  to the Holder and shall
file,  and use its best  efforts to cause to become  effective,  an  appropriate
registration  statement under the 1933 Act covering the Warrant Stock,  provided
that  in  the  opinion  of  the  Company's  counsel,  no  events  preclude  such
registration.

         If a registration  requested pursuant to this Section 9.2 is to involve
an underwritten  public offering in which the obligation of the  underwriters is
to take all of the  shares to be sold if any are to be taken,  the  Company  and
other  holders of  securities  of the  Company may  include  securities  in such
registration only if the managing  underwriter of such public offering concludes
that such  inclusion will not adversely  affect the successful  marketing or the
price of the Warrant Stock to be included in such public offering.

         In the event  that the Holder  demands  registration  pursuant  to this
Section 9.2 within the six months  immediately  prior to the  expiration  of the
Warrant,  and the Company,  through no fault of the Holder, is unable to provide
such  registration,  the expiration date of this Warrant shall be extended until
the thirtieth (30th) day after a registration statement for the Warrant Stock is
declared effective.

         The Holder's right to demand registration  pursuant to this Section 9.2
may be exercised  only one time prior to  expiration  of the Warrant;  provided,
however,  that the right shall not be deemed  exhausted  unless the registration
statement  covering so much of the  Warrant  Stock as the Holder and its assigns
wish to sell pursuant to the registration statement becomes effective.

         9.3  Filing  Obligations  of  the  Company.   In  connection  with  any
registration  of Warrant Stock  effected  under Sections 9.1 or 9.2, the Company
shall:

                  (a)  prepare  and file  the  registration  statement  and such
amendments and supplements to the  registration  statement and the prospectus or
offering  circular used in connection  therewith as may be necessary to keep the
registration  statement effective for a period of ninety (90) days and to comply

                                       14
<PAGE>

with the  provisions  of the 1933 Act and the rules and  regulations  thereunder
with respect to the disposition of all Warrant Stock covered by the registration
statement for the period required to effect the distribution  thereof, but in no
event  shall the  Company be  required to do so for a period of more than ninety
(90) days following the effective date of such registration statement;

                  (b)  furnish  to the  Holder  such  number  of  copies  of any
prospectus or offering circular,  including a preliminary  prospectus,  and of a
full registration  statement and exhibits in conformity with the requirements of
the 1933 Act and rules and regulations thereunder,  as the Holder may reasonably
request in order to facilitate the disposition of such securities;

                  (c) use its best  efforts to  register  or qualify the Warrant
Stock covered by the  registration  statement  under the  securities or blue sky
laws of such jurisdictions as the Holder may reasonably request,  and accomplish
any and all other acts and things  which may be necessary or advisable to permit
sale in such jurisdictions of such Warrant Stock;  provided,  however,  that the
Company shall not be required to register as a dealer or to qualify as a foreign
corporation  in any such  jurisdictions  or to escrow any shares of its  capital
stock.

         9.4 Expenses.  All expenses  incurred by the Company in connection with
any registration of Warrant Stock effected under Sections 9.1 or 9.2, including,
without  limitation,  all  registration  or filing  fees,  fees and  expenses of
complying with state securities and blue sky laws,  printing expenses,  fees and
expenses of the Company's  counsel and accountants and fees shall be paid by the
Company;  provided,   however,  that  all  underwriting  discounts  and  selling
commission applicable to the Warrant Stock shall not be borne by the Company but
shall be borne by the Holder.


                                       15
<PAGE>


         9.5      Indemnification.

                  (a) By the  Company.  In  connection  with the  filing  of any
registration statements and sales of Warrant Stock thereunder, the Company shall
indemnify  and hold harmless the Holder of this Warrant,  any  underwriter,  and
each other Person, if any, who controls the Holder or the underwriter within the
meaning of the 1933 Act, against losses, claims,  damages or liabilities,  joint
or several (or actions in respect thereto) ("Losses"), to which any such Holder,
underwriter,  or  controlling  Person may become  subject  under the 1933 Act or
otherwise,  insofar  as such  Losses  arise out of or are based  upon any untrue
statement or alleged  untrue  statement of any  material  fact  contained in any
registration  statement under which Warrant Stock was registered  under the 1933
Act, any preliminary prospectus, offering circular or final prospectus contained
therein,  or any  amendment or  supplement  thereto,  or any report filed by the
Company  with  the  Securities   and  Exchange   Commission   (the   "Disclosure
Documents"),  or arise out of or are based upon the omission or alleged omission
to state therein a material  fact required to be stated  therein or necessary to
make the statements therein not misleading,  and will reimburse any such Holder,
underwriter,  or  controlling  Person  for  any  legal  or  any  other  expenses
reasonably  incurred in  connection  with  investigating  or defending  any such
claims,  excluding any amounts paid in settlement  of  litigation,  commenced or
threatened,  if such settlement is effected without the prior written consent of
the Company; provided, however, that the Company shall not be liable in any such
case to the  extent  that any such  Losses  arise out of or are  based  upon any
untrue statement,  alleged untrue statement or omission or alleged omission made
in such Disclosure  Document in reliance upon and in conformity with information
furnished  to the  Company  in  writing  by or on behalf  of the  Holder of this
Warrant  for  use  specifically  in  connection  with  the  preparation  of such
Disclosure Document.

                  (b) By the  Holder.  In  connection  with  the  filing  of any
registration  statement and sales of Warrant Stock thereunder,  the Holder shall
indemnify the Company,  each of its  directors,  each of its officers who signed
such  registration  statement,  and each other Person,  if any, who controls the
Company  within  the  meaning of the 1933 Act,  against  any Losses to which the
Company,  any of its directors,  or controlling Persons may become subject under
the 1933 Act or otherwise, insofar as such Losses arise out of or are based upon
any untrue  statement or alleged untrue statement of any material fact contained
in any of the  Disclosure  Documents  or  arise  out of or are  based  upon  the
omission or alleged  omission to state  therein a material  fact  required to be
stated therein or necessary to make the statements  therein not misleading,  and
will reimburse the Company, and any of its directors,  officers,  or controlling
Persons for any legal or any other  expenses  reasonably  incurred in connection
with  investigating or defending any such claims,  excluding any amounts paid in
settlement  of  litigation,  commenced  or  threatened,  if such  settlement  is
effected  without the prior written  consent of the Holder;  provided,  however,
that such  indemnification  or  reimbursement  shall be payable in any such case
only to the extent  that such  statement  or alleged  statement  or  omission or
alleged omission is made in reliance on information  furnished to the Company in
writing by or on behalf of the Holder for use  specifically  in connection  with

                                       16
<PAGE>

the preparation of such Disclosure Document.

         9.6  Assignability.  The  rights of the Holder  under  this  Article 9,
except the right to request piggyback  registration or demand registration,  may
be assigned  by Holder to the full  extent  that the  Warrant  may be  assigned,
subject  to  assumption  by  the  assignee  of  the  corresponding   obligations
hereunder.

                                   ARTICLE 10

                                  MISCELLANEOUS


         10.1  Governing  Law.  The  rights of the  parties  arising  under this
Warrant shall be construed and enforced  under the laws of the State of Colorado
without giving effect to the doctrine of conflict of laws.

         10.2 Notices.  Any notice or other communication  required or permitted
to be given or delivered  pursuant to this Warrant shall be in writing and shall
be deemed given if delivered personally or by facsimile transmission (if receipt
is  confirmed  by the  facsimile  operator of the  recipient),  or  delivered by
overnight  courier  service or mailed by  registered  or certified  mail (return
receipt  requested),  postage prepaid, to the parties at the following addresses
(or at such other  address in the United  States of America for a party as shall
be specified by like notice; provided that notices of change of address shall be
effective only upon receipt thereof):

                  (i)      to the Holder as follows:

                  Associated Energy Managers
                  1200 Converse Street, Suite 201
                  Longmeadow, MA 01106
                  Attn: Robert Gershen
                  Facsimile No.: (413) 567-7926

                  Wilmer, Cutler & Pickering
                  2445 M St. N.W.
                  Washington, D.C.  20037
                  Attn:  Russell J. Bruemmer
                  Facsimile No.: (202) 663-6363

                  (ii)     to the Company as follows:

                  Vessels Oil & Gas Company
                  1050 Seventeenth St., Suite 2000
                  Denver, Colorado  80265

                                       17
<PAGE>

                  Attn: Nicholas Aretakis/Richard Hartfield
                  Facsimile No.: (303) 825-2532

         10.3  Severability.  If any  provision  of this  Warrant  shall be held
invalid,  such  invalidity  shall not affect any other  provision of the Warrant
that can be given  effect  without the invalid  provision,  and to this end, the
provisions hereof are separable.

         10.4 Headings.  The headings in this Warrant are for reference purposes
only and  shall not  affect in any way the  meaning  or  interpretation  of this
Warrant.

         10.5 Amendment.  This Warrant cannot be amended or modified except by a
written agreement executed by the Company and the Holder.

         10.6  Assignment.  This Agreement shall be binding upon an inure to the
benefit  of  the   parties   hereto  and  their   respective   heirs,   personal
representatives,  successors  and  assigns  except  that no party may  assign or
transfer its rights or obligations under this Agreement to the extent explicitly
prohibited herein.

         10.7 Entire Agreement.  This Agreement,  together with its attachments,
contains the entire  understanding  among the parties hereto with respect to the
subject matter hereof and supercedes  all prior and  contemporaneous  agreements
and  understandings,  inducements  or  conditions,  express or implied,  oral or
written, except as herein contained.

         10.8 Registration of Warrant.  This Warrant and any subsequent  Warrant
executed and  delivered  by the Company  pursuant to a transfer by the Holder in
accordance  with  Article  3 shall be  registered  by the  Company  in a Warrant
Register as they are issued.


                                       18
<PAGE>


         IN WITNESS WHEREOF, the Company has caused this Warrant to be signed in
its name by its President or a Vice President thereunto duly authorized.

Dated:  December 16, 1993


                            VESSELS OIL & GAS COMPANY


                            By:
                            Name:
                            Its:


                                       19
<PAGE>


                                                                   EXHIBIT 21.1


                             SUBSIDIARIES OF ABRAXAS


Abraxas Petroleum Corporation
     a Nevada corporation ("Abraxas")

Canadian Abraxas Petroleum Limited,
     a Canada corporation and wholly-
     owned subsidiary of Abraxas

VEI Acquisition Corp.
     a Delaware corporation and
     wholly-owned subsidiary of
     Abraxas

Cascade  Oil &  Gas  Ltd.,  an  Alberta  corporation  ("Cascade")  Abraxas  owns
     approximately 46% of the capital stock of Cascade

Western Associated Energy Corporation
     a Texas corporation and wholly-
     owned subsidiary of Abraxas


                                       1
<PAGE>




                                                                  EXHIBIT 23.1


                         CONSENT OF INDEPENDENT AUDITORS


We consent to the  reference to our firm under the caption  "Experts" and to the
use of our reports  dated March 21,  1997 and August 30,  1996,  included in the
Proxy  Statement  of Abraxas  Petroleum  Corporation  that is made a part of the
Registration   Statement   (Form  S-4)  and  Prospectus  of  Abraxas   Petroleum
Corporation for the registration of 1,900,000 shares of its common stock.


/s/ ERNST & YOUNG LLP


San Antonio, Texas
January 9, 1998


<PAGE>




                                                                  EXHIBIT 23.2


   
January 9, 1998
    


Abraxas Petroleum Corporation
500 North Loop 1604 East, Suite 100
San Antonio, Texas  78232

Gentlemen:

         In  connection  with  the  Registration  Statement  on  Form  S-4  (the
Registration Statement), to be filed with the Securities and Exchange Commission
on or about January 8, 1998, by Abraxas  Petroleum  Corporation  (the  Company),
DeGolyer and MacNaughton (the firm) hereby consents to the incorporation in said
Registration  Statement of the  references to the firm in the section  "Reserves
Information"  and in the  section  "Experts"  that are part of the  Registration
Statement.   Additionally,  we  hereby  consent  to  the  use  by  reference  of
information contained in our appraisal reports for estimates, as of December 31,
1994, December 31, 1995, and December 31, 1996.


Very truly yours,



/s/ DeGOLYER and MacNAUGHTON



<PAGE>



                                                                   EXHIBIT 23.3



CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS

         We  consent  to the use in the  Registration  Statement  on Form S-4 of
Abraxas  Petroleum  Corporation of our name, and the statements  with respect to
us, as  appearing  under the  headings  "Summary,"  "The  Merger,"  "Business of
Vessels" and "Experts" in the Proxy Statement-Prospectus.


                                           NETHERLAND, SEWELL & ASSOCIATES, INC.



                                            By:      /s/ Frederic D. Sewell
                                            Name: Frederic D. Sewell
                                            Title:  President

Dallas, Texas
January 9, 1998



<PAGE>


                                                                  EXHIBIT 23.6


INDEPENDENT AUDITORS' CONSENT

We  consent  to the use in this  Registration  Statement  on Form S-4 of Abraxas
Petroleum  Corporation of our report on Enserch  Exploration,  Inc.'s  Wamsutter
Area Package dated June 26, 1996, appearing in the Prospectus which is a part of
such  Registration  Statement,  and to the  reference  to us under  the  heading
"Experts" in such Prospectus.


/s/ Deloitte & Touche LLP

Dallas, Texas
January 7, 1998



<PAGE>



                                                                  EXHIBIT 23.7


                  CONSENT OF INDEPENDENT CHARTERED ACCOUNTANTS


To the Board of Directors
Canadian Abraxas Petroleum Limited

We consent to the use of our report  included herein and to the reference to our
firm under the heading "Experts" in the Prospectus and Registration Statement.


/s/ KPMG
Chartered Accountants

Calgary, Canada
January 9, 1998



<PAGE>


                                                                  EXHIBIT 23.8



                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent  public  accountants,  we hereby consent to the use of our report
dated April 7, 1997 and to all references to our Firm included in or made a part
of this Registration Statement.


                                                     /s/ ARTHUR ANDERSEN LLP

Denver, Colorado
January 9, 1998


<PAGE>
                                                                 EXHIBIT 23.9


                       CONSENT OF INDEPENDENT ACCOUNTANTS


We  hereby  consent  to the  use in the  Prospectus  constituting  part  of this
Registration  statement  on Form S-4 of  Abraxas  Petroleum  Corporation  of our
report  dated March 27, 1995  relating to the  financial  statements  of Vessels
Energy,  Inc.  (successor to Vessels Oil & Gas  Company),  which appears in such
Prospectus.  We also consent to the reference to us under the heading  "Experts"
in such Prospectus.


/s/ PRICE WATERHOUSE LLP
                    
Denver, Colorado
January 9, 1998

<PAGE>

                                                               EXHIBIT 23.10


                                     CONSENT


         In  connection  with  the  merger  (the  "Merger")  of  a  wholly-owned
subsidiary  of  Abraxas  Petroleum  Corporation  (the  "Company")  with and into
Vessels  Energy,  Inc., and the filing of a  Registration  Statement on Form S-4
with the Securities and Exchange Commission (the "Registration Statement"),  the
undersigned  consents to be named in the Company's  Registration  Statement as a
person who will be appointed as a director upon consummation of the Merger.  The
undersigned  further  consents  to  serve  as a  director  of  the  Company,  if
appointed,  and to the filing of this consent as an exhibit to the  Registration
Statement.

Dated:  January 9, 1998


                                                 /s/ Robert F. Semmens
                                                 Robert F. Semmens




<PAGE>



                                                                  EXHIBIT 24.1


                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Abraxas   Petroleum   Corporation   and   any  or  all   amendments   (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


         Dated:  January 9, 1998.



                                                        /s/ Franklin Burke
                                                        Franklin Burke



<PAGE>



                                                                  EXHIBIT 24.2

                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Abraxas   Petroleum   Corporation   and   any  or  all   amendments   (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


         Dated:  January 9, 1998.



                                                      /s/ Harold D. Carter
                                                      Harold D. Carter



<PAGE>




                                                                EXHIBIT 24.3


                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Abraxas   Petroleum   Corporation   and   any  or  all   amendments   (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


         Dated:  January 9, 1998.



                                                     /s/ Robert D. Gershen
                                                     Robert D. Gershen



<PAGE>



                                                                  EXHIBIT 24.4


                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Abraxas   Petroleum   Corporation   and   any  or  all   amendments   (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


         Dated:  January 9, 1998.



                                                 /s/ Richard M. Kleberg, III
                                                 Richard M. Kleberg, III



<PAGE>



                                                                  EXHIBIT 24.5


                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Abraxas   Petroleum   Corporation   and   any  or  all   amendments   (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


         Dated:  January 9, 1998.



                                                     /s/ James C. Phelps
                                                     James C. Phelps



<PAGE>



                                                                  EXHIBIT 24.6


                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Abraxas   Petroleum   Corporation   and   any  or  all   amendments   (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


         Dated:  January 9, 1998.



                                                   /s/ Paul A. Powell, Jr.
                                                   Paul A. Powell, Jr.



<PAGE>



                                                                   EXHIBIT 24.7


                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears
below constitutes and appoints Robert L. G. Watson and Chris Williford, and each
of them, as his true and lawful attorneys-in-fact and agents, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all  capacities,  to sign  the  Registration  Statement  on Form  S-4 of
Abraxas   Petroleum   Corporation   and   any  or  all   amendments   (including
post-effective  amendments)  thereto  and to file the  same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.


         Dated:  January 9, 1998.



                                                       /s/ Richard M. Riggs
                                                       Richard M. Riggs


<TABLE> <S> <C>

<ARTICLE>                     5
<MULTIPLIER>                                   1000
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                              DEC-31-1997
<PERIOD-START>                                 JAN-1-1997
<PERIOD-END>                                   SEP-30-1997
<CASH>                                          7559
<SECURITIES>                                       0
<RECEIVABLES>                                  11016
<ALLOWANCES>                                     (36)
<INVENTORY>                                      430
<CURRENT-ASSETS>                               19174
<PP&E>                                        346459
<DEPRECIATION>                                (58250)
<TOTAL-ASSETS>                                317182
<CURRENT-LIABILITIES>                          28831
<BONDS>                                       215000
                              0
                                        0
<COMMON>                                          63
<OTHER-SE>                                     32063
<TOTAL-LIABILITY-AND-EQUITY>                  317182
<SALES>                                        50691
<TOTAL-REVENUES>                               50691
<CGS>                                              0
<TOTAL-COSTS>                                  34908
<OTHER-EXPENSES>                                 610
<LOSS-PROVISION>                                   0
<INTEREST-EXPENSE>                             18757
<INCOME-PRETAX>                                (3584)
<INCOME-TAX>                                   (1071)
<INCOME-CONTINUING>                            (2598)
<DISCONTINUED>                                     0
<EXTRAORDINARY>                                    0
<CHANGES>                                          0
<NET-INCOME>                                   (2781)
<EPS-PRIMARY>                                   (.47)
<EPS-DILUTED>                                   (.47)
        


</TABLE>


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission