AMENDED AND RESTATED CREDIT AGREEMENT





                     ABRAXAS PETROLEUM CORPORATION,
                            as the Borrower,


                        the Banks named herein,

                                  and

                         BANKERS TRUST COMPANY,
                                as Agent

                                  and

                    ING (U.S.) CAPITAL CORPORATION,
                              as Co-Agent



                 AMENDED AND RESTATED CREDIT AGREEMENT


                     Dated as of November 14, 1996





HOU04:43581.4






TABLE OF CONTENTS


PRELIMINARY STATEMENT                                            1

ARTICLE I  DEFINITIONS, ETC.                                      2
      Section 1.01.  Certain Defined Terms                        2
      Section 1.02.  Accounting Terms                             2
      Section 1.03.  Computation of Time Periods                  2
      Section 1.04.  References, Etc.                             2

ARTICLE II  COMMITMENTS AND TERMS OF CREDIT                       2
      Section 2.01.  Commitments                                  2
      Section 2.02.  Borrowing Procedures; Conversions            3
      Section 2.03.  Issuing and Reimbursing the Letters
                       of Credit                                  5
      Section 2.04.  Borrowing Base                               7
      Section 2.05.  The Notes                                    9
      Section 2.06.  Reduction of the Commitments                 9
      Section 2.07.  Mandatory Repayment of Loans                 9
      Section 2.08.  Interest Accrual, Payments                   10
      Section 2.09.  Optional Prepayments                         12
      Section 2.10.  Payments, Notice of Certain Repayments
                           and Computations                       12
      Section 2.11.  Fees                                         13
      Section 2.12.  Setoff, Counterclaims and Taxes              14
      Section 2.13.  Funding Losses                               16
      Section 2.14.  Change of Law                                17
      Section 2.15.  Increased Costs                              18

ARTICLE III  CONDITIONS  OF  CREDIT                               19
      Section 3.01.  Conditions Precedent to Effectiveness,
                           the Initial Borrowing                  19
      Section 3.02.  Conditions Precedent to All Letters of
                           Credit and Loans                       22

ARTICLE IV  REPRESENTATIONS  AND  WARRANTIES                      22
      Section 4.01.  Corporate Existence                          23
      Section 4.02.  Corporate Authority; Binding Obligations     23
      Section 4.03.  No Conflict                                  23
      Section 4.04.  No Consent                                   23
      Section 4.05.  No Defaults or Violations of Law             24
      Section 4.06.  Financial Position                           24
      Section 4.07.  Litigation                                   24
      Section 4.08.  Use of Proceeds                              24
      Section 4.09.  Governmental Regulation                      25
      Section 4.10.  Disclosure                                   25

HOU04:43581.4






            Section 4.11.  ERISA                                  25
      Section 4.12.  Payment of Taxes                             26
      Section 4.13.  Title and Liens                              26
      Section 4.14.  Gas Imbalances                               27
      Section 4.15.  Environmental Matters                        27

ARTICLE V  AFFIRMATIVE COVENANTS                                  27
      Section 5.01.  Reporting Requirements                       28
      Section 5.02.  Taxes; Claims                                30
      Section 5.03.  Compliance with Laws                         30
      Section 5.04.  Insurance                                    30
      Section 5.05.  Corporate Existence                          31
      Section 5.06.  Inspections                                  31
      Section 5.07.  Maintenance of Properties                    31
      Section 5.08.  Accounting Systems                           32
      Section 5.09.  Use of Loans                                 32
      Section 5.10.  Reserve Reports                              32
      Section 5.11.  Title                                        34
      Section 5.12.  Additional Collateral                        34
      Section 5.13.  Further Assurances in General                34
      Section 5.14.  Enforcement of Acquisition Documents         34

ARTICLE VI  NEGATIVE COVENANTS                                    35
      Section 6.01.  Indebtedness Restriction                     35
      Section 6.02.  Lien Restriction                             36
      Section 6.03.  Derivatives                                  38
      Section 6.04.  Interest Coverage Ratio                      38
      Section 6.05.  Current Ratio                                38
      Section 6.06.  Tangible Net Worth                           38
      Section 6.07.  Sales of Assets                              38
      Section 6.08.  Consolidation and Mergers                    38
      Section 6.09.  Restricted Disbursements                     39
      Section 6.10.  Lines of Business                            39
      Section 6.11.  Transactions with Affiliates                 40

ARTICLE VII  DEFAULT AND REMEDIES                                 40
      Section 7.01.  Events of Default                            40
      Section 7.02.  Setoff in Event of Default                   43
      Section 7.03.  No Waiver; Remedies                          43
      Section 7.04.  Hydrocarbon Proceeds                         43
      Section 7.05.   Application of Proceeds After Acceleration  44

ARTICLE VIII  THE AGENT                                           45
      Section 8.01.  Authorization and Action                     45
      Section 8.02.  Reliance, Etc.                               46
      Section 8.03.  BTCo and Affiliates                          46
      Section 8.04.  Bank Credit Decision                         47

HOU04:43581.4






      Section 8.05.  Indemnification                              47
      Section 8.06.  Employees of the Agent and the Issuing Bank  48
      Section 8.07.  Successor Agent                              48
      Section 8.08.  Successor Co-Agent and Successor
                       Issuing Bank                               49
      Section 8.09.  Notice of Default                            50
      Section 8.10.  Execution of Loan Documents                  50

ARTICLE IX  MISCELLANEOUS                                         50
      Section 9.01.  Amendments, Etc.                             50
      Section 9.02.  Participation Agreements and Assignments     51
      Section 9.03.  Notices                                      53
      Section 9.04.  Costs and Expenses                           54
      Section 9.05.  Successors and Assigns                       55
      Section 9.06.  Independence of Covenants                    55
      Section 9.07.  Survival of Representations and Warranties   55
      Section 9.08.  Separability                                 55
      Section 9.09.  Captions                                     55
      Section 9.10.  Counterparts                                 55
      Section 9.11.  Governing Law                                56
      Section 9.12.  Submission to Jurisdiction                   56
      Section 9.13.  Limitation on Interest                       56
      Section 9.14.  Indemnification                              57
      Section 9.15. Ratification of Security Documents            58
      Section 9.16.  Confidentiality                              58
      Section 9.17.  Final Agreement of the Parties               59

Exhibits and Schedules

      Exhibit 2.02(a)  Form of Borrowing Request
      Exhibit 2.02(c)  Form of Conversion Notice
      Exhibit 2.03     Form of Letter of Credit Request
      Exhibit 2.05     Form of Revolving Note
      Exhibit 9.02      Form of Assignment and Acceptance Agreement

      Schedule 4.01    List of Borrower's Subsidiaries
      Schedule 4.04    Consents
      Schedule 4.07    Litigation
      Schedule 4.13    Titles and Liens
      Schedule 4.14    Gas Imbalances
      Schedule 6.01    Indebtedness


HOU04:43581.4







                       THIS AMENDED AND RESTATED CREDIT
AGREEMENT dated as of November 14, 1996 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"),  and BANKERS TRUST COMPANY,  as agent for the Banks (together with
its successors and assigns in such  capacity,  the "Agent"),  and as the issuing
bank with respect to the Letters of Credit issued  hereunder  (together with its
successors and assigns in such  capacity,  the "Issuing  Bank"),  and ING (U.S.)
CAPITAL CORPORATION (formerly known as Internationale Nederlanden (U.S.) Capital
Corporation),  as  co-agent  for the Banks  (together  with its  successors  and
assigns in such capacity, the "Co-Agent").  Unless otherwise defined herein, all
capitalized  terms used  herein and  defined in Article I are used  herein as so
defined.

                         PRELIMINARY STATEMENT

                       A. The  Borrower,  the Agent and the Banks  entered  into
that certain  Credit  Agreement  dated as of September  30, 1996 (the  "Original
Credit  Agreement")  whereby  the  Banks  agreed  to make  certain  loans to the
Borrower.

                       B.  Bankers  Trust  Company has assigned a portion of its
rights and  obligations  under the  Original  Credit  Agreement to Union Bank of
California,  N.A.,  pursuant to that certain  Assignment  and  Acceptance  dated
November 13, 1996.

                       C.  In  connection  with  the  consummation  of the  Bond
Offering (as defined  herein) the Borrower has paid  contemporaneously  with the
effectiveness  of this  Agreement  all amounts  outstanding  under the  Original
Credit Agreement.

                       D. The Borrower,  the Agent and the Banks desire to amend
and restate the Original Credit Agreement in its entirety,  to provide for among
other  things,  the  modification,  extension  and  renewal  of  the  "Revolving
Commitments"  under the Original  Credit  Agreement,  which are the  Commitments
referred to herein.

                       Accordingly,  in  consideration  of the foregoing and the
mutual  covenants set forth herein,  the parties agree that the Original  Credit
Agreement is hereby amended and restated in its entirety to read as follows:


HOU04:43581.4






                               ARTICLE I
                           DEFINITIONS, ETC.

                       Section 1.01.  Certain Defined Terms.  Capitalized  terms
used  in this  Agreement  and not  otherwise  defined  herein,  shall  have  the
respective  meanings  set forth in Annex A hereto  (such  meanings to be equally
applicable to both singular and plural forms of the terms defined).

                       Section 1.02.  Accounting Terms. All accounting terms not
specifically  defined  herein shall be construed in  accordance  with  generally
accepted accounting  principles consistent with those applied in the preparation
of the consolidated financial statements referred to in Section 4.06.

                       Section  1.03.  Computation  of  Time  Periods.  In  this
Agreement in the computation of periods of time from a specified date to a later
specified  date,  the word "from" means "from and  including" and the words "to"
and "until" each means "to but excluding."

                       Section  1.04.  References,   Etc.  The  words  "hereof,"
"herein" and "hereunder" and words of similar import when used in this Agreement
shall refer to this Agreement as a whole and not to any particular  provision of
this  Agreement.  All  references  herein to  Sections,  Annexes,  Exhibits  and
Schedules shall, unless the context requires a different construction, be deemed
to be references to the Sections of this Agreement and the Annexes, Exhibits and
Schedules  attached hereto and made a part hereof.  In this Agreement,  unless a
clear contrary  intention  appears the word  "including"  (and with  correlative
meaning  "include")  means  including,  without  limiting the  generality of any
description  preceding  such  term.  No  provision  of this  Agreement  shall be
interpreted  or construed  against any Person solely  because that Person or its
legal representative drafted such provision.



HOU04:43581.4






                               ARTICLE II
                    COMMITMENTS AND TERMS OF CREDIT

                       Section 2.01.  Commitments.  (a) (i)  Each Bank severally
agrees,  on the terms and conditions  hereinafter set forth, to make one or more
loans (the "Loans") to the Borrower from time to time on any Business Day during
the period from the Effective Date up to, but excluding, the Maturity Date in an
aggregate  amount  outstanding for such Bank not to exceed at any time an amount
equal to such Bank's  Commitment.  Each Loan shall be made as either a Base Rate
Loan or a  Eurodollar  Rate Loan and as part of a single  Borrowing  made on the
same  day  by  the  Banks  ratably  according  to  their  respective  Commitment
Percentages.  Each Base Rate Borrowing shall be in an aggregate  amount not less
than  $2,000,000,  or,  if  less,  the  entire  unfunded  portion  of the  Total
Commitment.  Each Eurodollar Rate Borrowing shall be in an aggregate  amount not
less than  $2,000,000 or an integral  multiple of $1,000,000 in excess  thereof.
Within the limits set forth  above and  subject to the terms and  conditions  of
this  Agreement,  the  Borrower  may borrow,  repay  pursuant to Section 2.07 or
prepay pursuant to Section 2.09 and reborrow under this Section 2.01(a).

                       (ii) The Issuing Bank agrees, on the terms and conditions
hereinafter set forth, to issue standby or commercial  letters of credit for the
account of the Borrower  (the  "Letters of Credit") from time to time on any one
or more  Business  Days  during the period  from the  Effective  Date up to, but
excluding,  the ninetieth (90th) day preceding the Maturity Date in an aggregate
amount  for all  Outstanding  Letters of Credit  not  exceeding  at any time the
Letter of Credit Limit.  Each Letter of Credit shall be  denominated in Dollars,
shall expire no later than the date set forth in Section  2.03(a),  and shall be
in such form as approved from time to time by the Issuing Bank and the Borrower.
Each Bank severally agrees,  on the terms and conditions  hereinafter set forth,
to purchase  participations  in the Letters of Credit issued by the Issuing Bank
pursuant  to  this  Agreement  in an  amount  equal  to such  Bank's  Commitment
Percentage  of the face  amount of such Letter of Credit.  Upon the  issuance of
each Letter of Credit, the Issuing Bank shall be deemed,  without further action
by any party hereto,  to have sold to each Bank,  and each Bank shall be deemed,
without  further action by any party hereto,  to have purchased from the Issuing
Bank, a participation,  to the extent of such Bank's Commitment  Percentage,  in
such Letter of Credit, the obligations of the Issuing Bank thereunder and in the
reimbursement  obligations of the Borrower due in respect of drawings made under
such  Letter of Credit.  Subject to the terms of the Loan  Documents,  the Banks
will  execute any other  documents  the Issuing Bank may  reasonably  request to
evidence  the  purchase  of such  participation.  On each day  during the period
commencing  with the  issuance by the  Issuing  Bank of any Letter of Credit and
ending on the date  when  such  Letter of  Credit  shall  have  expired  or been
terminated,  and,  irrespective  of whether such Letter of Credit has expired or
terminated  if such Letter of Credit has been drawn upon and the amount so drawn
has not been  reimbursed to the Issuing Bank,  the Commitment of each Bank shall
be deemed to be  utilized  for all  purposes  hereof in an amount  equal to such
Bank's Commitment Percentage of the Outstanding Letters of Credit.

HOU04:43581.4






                       (iii)  Notwithstanding any other term or provision hereof
(A) no Loan  shall be made and no  Letter  of  Credit  shall be  issued if after
giving  effect to the making of such Loan or  issuance  of such Letter of Credit
the aggregate amount of Credit Outstanding would exceed the Total Commitment and
(B) no Letter of Credit shall be issued if after  giving  effect to the issuance
of such Letter of Credit the aggregate  amount of Outstanding  Letters of Credit
would exceed the Letter of Credit Limit.

                       (b) Loans of more than one Type may be outstanding at the
same time, but the Borrower shall not be entitled to request any Borrowing or to
Convert  Loans  comprising  any  Borrowing  into Loans of another Type, if after
giving  effect to such  Borrowing  or  Conversion,  as the case may be, any Bank
would have outstanding (i) at any one time more than four (4) different Types of
Loans.  Loans having  different  Interest  Periods,  regardless  of whether they
commence  on the same  date or have the same  type of  interest  rate,  shall be
considered different Types of Loans; provided, however, that all Base Rate Loans
are the same type of Loan so long as they remain Base Rate Loans.

                       Section 2.02. Borrowing Procedures;  Conversions. (a) (i)
Each  Borrowing  shall  be  made  upon  the  written,  telecopied  or  facsimile
transmitted  request  of the  Borrower,  given to the Agent not later than 11:00
a.m.  (New  York  time) on (A) the  third  Business  Day  prior to the  proposed
Borrowing Date in the case of a Eurodollar Rate  Borrowing,  or (B) the Business
Day immediately preceding the proposed Borrowing Date in the case of a Base Rate
Borrowing,  and the Agent shall give each other  member of the Bank Group prompt
notice of such request by telecopier, telex or cable.

                       (ii) Each request for a Borrowing (a "Borrowing Request")
      made by the  Borrower  shall  be in  substantially  the  form  of  Exhibit
      2.02(a), specifying therein (A) the Borrowing Date for such Borrowing, (B)
      the Type of Loans  comprising such Borrowing,  (C) the aggregate amount of
      such  Borrowing and (D) in the case of a Eurodollar  Rate  Borrowing,  the
      Interest Period for the Loans comprising such Borrowing.  Each Bank shall,
      before  12:00  Noon (New York  time) on the date of such  Borrowing,  make
      available for the account of its Applicable Lending Office to the Agent at
      its address  referred to in Section 9.03,  in same day funds,  such Bank's
      ratable portion of such Borrowing. After the Agent's receipt of such funds
      and upon  fulfillment  of the  applicable  conditions set forth in Article
      III,  the Agent  will make such funds  available  to the  Borrower  at the
      Agent's aforesaid address. Each Borrowing Request shall be irrevocable and
      binding on the Borrower.

                       (b) Unless the Agent  shall have  received  notice from a
Bank prior to the date of any Borrowing  that such Bank will not make  available
to the Agent such Bank's ratable portion of such Borrowing, the Agent may assume
that such Bank has made such portion  available to the Agent on the date of such
Borrowing in accordance  with  subsection (a) of this Section 2.02 and the Agent
may, in reliance upon such  assumption,  make  available to the Borrower on such
date a corresponding  amount. If and to the extent that such Bank shall not have

HOU04:43581.4







so made such ratable portion  available to the Agent, such Bank and the Borrower
severally  agree to repay to the Agent  forthwith  on demand such  corresponding
amount, together with interest thereon for each day from the date such amount is
made available to the Borrower until the date such amount is repaid to the Agent
at (i) in the case of the Borrower,  the interest rate applicable at the time to
the Loans  comprising  such  Borrowing  and (ii) in the case of such  Bank,  the
Federal  Funds Rate.  If such Bank shall  repay to the Agent such  corresponding
amount,  such amount so repaid shall constitute such Bank's Loan as part of such
Borrowing  for purposes of this  Agreement,  and  Borrower  shall be relieved of
Borrower's  obligation  to repay such amount  under this  Section  2.02(b).  The
failure  of any Bank to make the Loan to be made by it as part of any  Borrowing
shall not relieve any other Bank of its  obligation,  if any,  hereunder to make
its Loan on the date of such Borrowing or any subsequent  Borrowing Date, but no
Bank shall be responsible  for the failure of any other Bank to make the Loan to
be made by such other Bank on the date of any Borrowing.

                       (c)  The  Borrower  may,  subject  to the  terms  of this
Agreement,   on  any  Business  Day,  upon  written,   telecopied  or  facsimile
transmitted notice to the Agent, given not later than 11:00 a.m. (New York time)
on (i) the third Business Day prior to the proposed  Conversion Date in the case
of a Conversion of Loans into  Eurodollar  Rate Loans,  or (ii) the Business Day
immediately  preceding the proposed  Conversion Date in the case of a Conversion
of Loans into Base Rate Loans,  Convert Loans into Borrowings comprised of Loans
of another  Type,  and the Agent shall  promptly  transmit  the contents of such
notice to each  other  member of the Bank Group by  telecopier,  telex or cable.
Notwithstanding  any other term or provision hereof,  after giving effect to any
such  Conversion,  the size of all  Borrowings  outstanding  hereunder,  and the
number of different Types of Loans outstanding  hereunder,  shall conform to the
requirements  of Section 2.01. In the event of any Conversion of Eurodollar Rate
Loans on any day  other  than the last  day of the  Interest  Period  applicable
thereto,  the Borrower  shall be  obligated  to  reimburse  the Banks in respect
thereof  pursuant to Section 2.13.  Each notice of a Conversion  (a  "Conversion
Notice")  given by the Borrower  shall be in  substantially  the form of Exhibit
2.02(c) hereto,  specifying therein (A) the Conversion Date for such Conversion,
(B) the Loans to be Converted,  (C) the Type of Loans to which such Loans are to
be Converted and (D) in the case of a Conversion into Eurodollar Rate Loans, the
Interest  Period for such Converted  Loans. If the Borrower shall fail to give a
timely  Conversion  Notice conforming to the requirements of this Agreement with
respect to any  Eurodollar  Rate Loans prior to the  expiration  of the Interest
Period applicable  thereto,  such Eurodollar Rate Loans shall,  automatically on
the last day of such Interest Period, be Converted into Base Rate Loans.

                       Section  2.03.  Issuing  and  Reimbursing  the Letters of
Credit. (a) Each Letter of Credit shall, subject to the terms of this Agreement,
be issued  upon the written or  facsimile  transmitted  request (an  original of
which shall be immediately  forwarded by overnight  courier to the Issuing Bank)
of the Borrower  given to the Agent not later than 11:00 a.m. (New York time) on
the third  Business Day prior to the proposed date of issuance of such Letter of

HOU04:43581.4






Credit.  Each such request for a Letter of Credit (a "Letter of Credit Request")
made by the Borrower shall be in  substantially  the form of Exhibit 2.03 hereto
and shall  specify  the  Business  Day on which  such  Letter of Credit is to be
issued,  the beneficiary of such Letter of Credit,  the amount of such Letter of
Credit,  the draw conditions  applicable thereto and shall provide for an expiry
date which is not later than thirty days prior to the Maturity Date.

                       (b)  Upon   satisfaction  of  the  applicable  terms  and
conditions set forth in Article III, the Issuing Bank shall issue such Letter of
Credit to the  specified  beneficiary  not later than the close of business (New
York time) on the date so  specified.  The Issuing Bank shall provide each other
member of the Bank Group with a copy of each Letter of Credit so issued, but any
failure of the Issuing  Bank to provide  such Persons with a copy of such Letter
of Credit shall not in any way affect the Borrower's obligation to reimburse the
Issuing  Bank for any amount paid by the Issuing Bank under any Letter of Credit
or the Banks'  obligation to reimburse the Issuing Bank for such amount,  to the
extent  provided  herein,  in the event the  Borrower  fails to do so. Each such
Letter of Credit  shall (i)  provide for the payment of drafts or other forms of
payment to be presented for honor  thereunder by the  beneficiary  in accordance
with the terms thereon,  at sight when  accompanied  by the documents  described
therein and (ii) be subject to the Uniform  Customs and Practice for Documentary
Credits (1993 Revision),  International Chamber of Commerce Publication No. 500,
(and  any  subsequent   revisions   thereof   approved  by  a  Congress  of  the
International  Chamber of  Commerce  and  adhered to by the  Issuing  Bank) (the
"UCP") and shall,  as to matters not  governed  by the UCP, be governed  by, and
construed and  interpreted  in accordance  with,  the governing law specified in
this Agreement.

                       (c) Upon presentment to the Issuing Bank of any draft for
honor  under  any  Letter  of  Credit  by  the   beneficiary   thereof  and  the
determination  by the Issuing Bank that such draft is in order, the Issuing Bank
shall give prompt notice (a  "Reimbursement  Notice") to the Borrower of (i) the
Letter of Credit to which such Reimbursement Notice relates, (ii) the amounts to
be paid on account of such draft (the "Reimbursement Amount") and (iii) the date
on which such amounts are to be paid (the "Reimbursement Date"), but any failure
to so notify the Borrower shall not in any way affect the Borrower's obligations
to reimburse  the Issuing Bank for any amount paid by the Issuing Bank under any
Letter of Credit.

                       (d)  Upon  receipt  of  any  Reimbursement   Notice,  the
Borrower shall  reimburse the Issuing Bank by forthwith  paying to the Agent for
the benefit of the Issuing Bank (who shall  promptly  notify the Issuing Bank of
such payment) no later than 10:00 a.m. (New York time) on the Reimbursement Date
specified  in such  Reimbursement  Notice an amount  equal to the  Reimbursement
Amount specified in such Reimbursement  Notice,  and, if the Issuing Bank is not
fully  reimbursed  by the Borrower on such  Reimbursement  Date,  together  with
interest from such  Reimbursement  Date until such  reimbursement is made by the
Borrower at a fluctuating  rate per annum equal to the lesser of (i) the Highest
Lawful Rate and (ii) the Base Rate in effect during the time such  reimbursement

HOU04:43581.4







obligation  remains unpaid plus the  Applicable  Margin for Base Rate Loans from
such Reimbursement  Date until the third day immediately  following the delivery
of such Reimbursement Notice by the Issuing Bank to Borrower and (B) thereafter,
the Default Rate. To the extent availability may then exist, and upon compliance
with the relevant terms and conditions of this Agreement, the Borrower may repay
any or all of the  obligations  described  in this  paragraph  by  requesting  a
Borrowing and applying the proceeds thereof accordingly.

                       (e)   If the Borrower shall fail to reimburse the Issuing
Bank for any payment by the Issuing Bank under a Letter of Credit by 12:00 noon.
(New York time) on the Reimbursement Date specified in the Reimbursement  Notice
related thereto, the Agent shall give prompt notice thereof to each other member
of the Bank Group. Upon receipt of such notice, each Bank shall, notwithstanding
any other provision of this Agreement  (including the occurrence and continuance
of a  Default  or an Event of  Default),  make  available  to the  Agent for the
benefit of the Issuing Bank an amount equal to its Commitment  Percentage of the
Reimbursement Amount specified in the related Reimbursement Notice no later than
the close of business on such Reimbursement  Date. If such amount is not in fact
made available to the Agent by such Bank on such  Reimbursement  Date, such Bank
shall pay to the Agent for the  account of the Issuing  Bank,  on demand made by
the Issuing  Bank,  in addition to such amount,  interest on such amount for the
number of days that elapse from such Reimbursement Date to the date on which the
amount equal to such Bank's Commitment  Percentage of such Reimbursement  Amount
becomes  immediately  available to the Issuing Bank at a rate per annum equal to
the average daily Federal Funds Rate for such days.  Any amount  received by the
Agent or the Issuing Bank from the Borrower in respect of a draft  honored under
a Letter of Credit after one or more of the Banks have made funds  available for
the payment of such draft pursuant to this  paragraph  shall be paid over by the
Agent or the Issuing Bank, as the case may be, to the Banks,  pro rata according
to the amounts so made  available  by the Banks,  promptly  upon  receipt by the
Agent or the  Issuing  Bank of such  amount.  Nothing  in this  Agreement  shall
diminish the Borrower's obligation under this Agreement to provide the funds for
the payment of, or on demand to  reimburse  the Issuing Bank for payment of, any
draft  presented  to, and duly  honored by, the Issuing Bank under any Letter of
Credit.

                       (f) In order to induce the  issuance of Letters of Credit
by the Issuing Bank and the purchase of participations therein by the Banks, the
Borrower irrevocably agrees (i) that the obligation of the Borrower to reimburse
the  Issuing  Bank for  amounts  paid by the  Issuing  Bank  under any Letter of
Credit,  including accrued interest thereon, as set forth herein is absolute and
unconditional,  (ii) that no member of the Bank Group  shall be  responsible  or
liable for, and the Borrower's unconditional obligation to reimburse the Issuing
Bank through the Agent for amounts paid by the Issuing Bank on account of drafts
honored under the Letters of Credit shall not be affected by, any  circumstance,
act or  omission  whatsoever  relating  to any Letter of Credit,  whether or not
known to any member of the Bank Group, unless such circumstance, act or omission
results in the wrongful payment or the wrongful dishonor of any Letter of Credit

HOU04:43581.4







or is otherwise the result of the gross negligence or willful misconduct of such
member of the Bank Group,  (iii) that any action taken or omitted to be taken by
any member of the Bank Group under or in connection with any Letter of Credit or
any related  draft,  document or property  shall be binding on the  Borrower and
shall not put any member of the Bank Group under any resulting  liability to the
Borrower,  unless such action or omission results in the wrongful payment or the
wrongful  dishonor  of any  Letter of Credit or  otherwise  is the result of the
gross negligence or willful misconduct of such member of the Bank Group and (iv)
to  indemnify,  defend and hold each member of the Bank Group  harmless from and
against  any  and  all  liabilities,  damages,  claims  or  reasonable  expenses
(including  reasonable  attorneys' fees and amounts paid in settlement)  arising
out of or based on any  Letter of  Credit,  except to the extent the same is the
result of the wrongful payment or the wrongful  dishonor of any Letter of Credit
or is otherwise the result of the gross negligence or willful  misconduct of the
Person  seeking  indemnity  hereunder,  IT BEING THE  EXPRESS  INTENTION  OF THE
BORROWER  THAT  EACH  MEMBER OF THE BANK  GROUP  SHALL BE  INDEMNIFIED  AND HELD
HARMLESS AGAINST ANY AND ALL LIABILITIES, CLAIMS, OR REASONABLE EXPENSES ARISING
OUT OF OR RESULTING FROM THE ORDINARY  NEGLIGENCE (WHETHER SOLE OR CONTRIBUTORY)
OF SUCH MEMBER OF THE BANK GROUP.  The Borrower  hereby waives  presentment  for
payment and notice of  dishonor,  protest and notice of protest  with respect to
drafts honored under the Letters of Credit.

                       (g) The  provisions of this  Agreement and the other Loan
Documents concerning collateral, standard of care of the Issuing Bank, timing of
payments,  interest rates applicable to any reimbursement obligation relating to
any Letter of Credit,  any  representations,  warranties,  covenants,  events of
default,  remedies  and  governing  law shall  supersede  in their  entirety the
provisions of any Letter of Credit application  relating to such matters. In the
event any other  provision of any Letter of Credit  application is  inconsistent
with, or in conflict of any provision of this  Agreement or any Loan  Documents,
the provisions of this Agreement or the Loan Documents shall govern.

                       Section 2.04.  Borrowing  Base. (a) The Borrowing Base in
effect  from time to time shall  represent  the maximum  amount  (subject to the
Total Commitment) of Loans that the Banks will make to the Borrower.  During the
period  from  and  after  the  Effective   Date  until  the  Borrowing  Base  is
redetermined in accordance  with this Section,  the amount of the Borrowing Base
shall be $20,000,000.  The Borrowing Base shall be determined in accordance with
Section  2.04(b) by the Agent and  approved by all of the Banks or the  Majority
Banks,  as  applicable.  The  Borrowing  Base is subject to  redetermination  in
accordance with Section 2.04(d). Upon any redetermination of the Borrowing Base,
such redetermination  shall remain in effect until the next successive date that
the  redetermined  Borrowing  Base  becomes  effective  subject  to  the  notice
requirements specified in Section 2.04(e) for both the scheduled redetermination
and unscheduled redeterminations.  So long as any part of the Commitments are in
effect and until all of the Loans  outstanding  hereunder are paid in full, this
Agreement shall be governed by the then effective Borrowing Base.

HOU04:43581.4








                       (b) The  Agent  will  after  receipt  of the most  recent
Reserve  Report  delivered to the Banks under Section 5.10,  and such other data
and supplemental information as may from time to time be reasonably requested by
the  Agent,  but in no  event  later  than  May 1 and  November  1 of each  year
commencing  May 1, 1997,  redetermine  the Borrowing  Base based on such Reserve
Report.  The  Agent  and  each  Bank  will  redetermine  the  Borrowing  Base in
accordance  with their  respective  normal  and  customary  oil and gas  lending
criteria as such exist at that  particular  time taking into  account all of the
assets and liabilities of the Borrower and its Subsidiaries.  The Agent and each
Bank, in their sole  discretion,  may make reasonable  adjustments to the rates,
volumes and prices and other  assumptions  set forth in the Reserve  Reports and
such  other  data and  supplemental  information.  Each  redetermination  of the
Borrowing  Base which would  increase the Borrowing Base must be approved by all
of the  Banks,  and each other  redetermination  of the  Borrowing  Base must be
approved by the Majority Banks. Failure of a Bank to object to a redetermination
within 14 days after notice of such redetermination is given to such Bank by the
Agent shall be deemed an approval of such redetermination by such Bank.

                       (c) The Agent may  exclude  any Oil and Gas  Property  or
portion of production  therefrom from the Borrowing  Base, at any time,  because
the status of title to such Oil or Gas Property is not  reasonably  satisfactory
to Agent or because such Oil and Gas Property is not subject to a first priority
lien in favor of the Agent as security for the Obligations.

                       (d) So long as any of the  Commitments  are in effect and
until  payment in full of all Loans  hereunder,  effective on or about May 1 and
November  1 of each  year  commencing  May 1,  1997  (each  being  a  "Scheduled
Redetermination  Date"),  the Agent with the approval of all of the Banks or the
Majority  Banks,  as applicable,  shall  redetermine the amount of the Borrowing
Base in  accordance  with Section  2.04(b).  In addition,  at any time after the
first   scheduled   Redetermination   Date,  (i)  the  Borrower  may  request  a
redetermination  of the  Borrowing  Base on its own  initiation  at any  time in
connection  with a proposed  acquisition of Oil and Gas  Properties  with a fair
market  value in excess of  $10,000,000  and at one  additional  time during any
consecutive  twelve (12) month period, and (ii) the Agent and Majority Banks may
each initiate a  redetermination  of the  Borrowing  Base at any time as they so
elect;  provided,  however,  that the Agent and Majority Banks may each initiate
only one such  unscheduled  redetermination  during any consecutive  twelve (12)
month  period  (each  being  an   "Unscheduled   Redetermination   Date").   Any
redetermination  of the Borrowing  Base on an Unscheduled  Redetermination  Date
shall be in accordance with Section 2.04(b).

                       (e) The  Agent  shall  promptly  notify  in  writing  the
Borrower and the Banks of the new Borrowing  Base. Such  redetermination  of the
Borrowing Base shall not be in effect until notice is given to the Borrower.


HOU04:43581.4






                       Section  2.05.  The  Notes.  The Loans  made by each Bank
shall be  evidenced  by a single Note issued to such Bank by the  Borrower,  (i)
dated the date of this  Agreement  (or such  other date as may be  specified  in
Section  9.02),  (ii)  payable to the order of such Bank in a  principal  amount
equal to such Bank's Commitment  Percentage of the Aggregate Maximum  Commitment
and (iii) otherwise duly completed. Each Loan made by a Bank to the Borrower and
all payments made on account of the principal amount thereof shall be entered by
such Bank in its records or on the schedule (or a continuation thereof) attached
to the Note of such Bank, provided, that prior to any transfer of any such Note,
such Bank shall endorse the amount and maturity of any outstanding  Loans on the
schedule (or a continuation thereof) attached to such Note.

                       Section  2.06.  Reduction  of the  Commitments.  (a)  The
Borrower shall have the right,  upon at least three Business Days' notice to the
Agent to terminate in whole or reduce ratably in part the unused portions of the
Aggregate  Maximum  Commitment;  provided,  that each  partial  reduction in the
Aggregate  Maximum  Commitment shall be in the aggregate amount of $1,000,000 or
an integral  multiple of $1,000,000  in excess  thereof.  Any such  reduction or
termination shall be irrevocable by the Borrower.

                       (b) On  each  Commitment  Reduction  Date,  the  Reducing
Commitment  Amount shall  automatically be reduced by an amount equal to 8.2% of
the Reducing Commitment Amount as of the first Commitment Reduction Date. On the
Maturity  Date the  Commitment  of each Bank shall  automatically  be reduced to
zero.

                       Section  2.07.  Mandatory  Repayment  of  Loans.  (a) The
Borrower  shall  from time to time repay the Loans  comprising  part of the same
Borrowing or provide cover for Outstanding  Letters of Credit in such amounts as
shall be necessary so that at all times the Credit  Outstanding  shall not be in
excess of the Total Commitment.  Except to the extent that repayment or cover is
required to be made in three equal monthly  installments  under Section 2.07(b),
any repayment or cover required by this Section 2.07(a) shall be due and payable
on the date such repayment or cover obligation accrues pursuant to the preceding
sentence.

                       (b) The Borrower  shall from time to time repay the Loans
comprising part of the same Borrowing or provide cover for  Outstanding  Letters
of Credit (as provided  below) in whole or ratably in part in an amount equal to
the  excess  of (i) the  Credit  Outstanding  as of any  redetermination  of the
Borrowing  Base pursuant to Section 2.04 over (ii) the Borrowing Base as of such
date. Any repayment or cover  required by this Section  2.07(b) shall be due and
payable in three  equal  monthly  installments,  each in an amount  equal to one
third (1/3rd) of the original amount of such excess,  commencing on the last day
of  the  calendar  month  immediately  following  such  redetermination  of  the
Borrowing Base and continuing on the same day of each subsequent calendar month.


HOU04:43581.4






                       (c) In the  event  that the  Borrower  shall be  required
pursuant to this  Section 2.07 to repay Loans or provide  cover for  Outstanding
Letters of Credit, the Borrower shall make such repayment and provide such cover
in the following order:  (i) first, pay the amount of all unreimbursed  drawings
under the Letters of Credit,  (ii) second,  repay the principal of the Loans and
(iii) third,  provide  cover for Letters of Credit.  Cover for Letters of Credit
shall be effected by paying to the Agent immediately available funds, to be held
by the Agent in an account under the sole dominion and control of the Agent, for
the benefit of the Bank Group,  as security for the  obligations of the Borrower
under the Loan Documents until the earlier of (A) the occurrence in this Section
2.07  which  necessitated  such  cover no longer  exists or (B) such time as the
Letters of Credit have been  terminated  and all  obligations of the Borrower to
the Bank Group (including the Issuing Bank) in respect thereof have been paid in
full,  at which  time the  Agent  shall  remit  the  amount  of such  cover,  in
immediately  available  funds,  at the direction or instruction of the Borrower.
Any funds  delivered  pursuant to the preceding  sentence  shall be placed in an
interest  bearing  account  selected  by the Agent and so long as no Default has
occurred  and is  continuing,  any  accrued  interest  on such  funds  shall  be
distributed monthly to the Borrower.

                       (d) All outstanding  Loans shall be fully due and payable
on the Maturity Date, together with any unpaid interest accrued thereon.

                       (e) Each repayment of Loans required by this Section 2.07
shall be accompanied by payment of accrued  interest to the date of such payment
on the principal  amount paid. In the event of any payment of a Eurodollar  Rate
Loan, the Borrower shall be obligated to reimburse the Banks in respect  thereof
pursuant to Section 2.13. All principal  payments  required by this Section 2.07
shall first be applied to Base Rate  Borrowings,  and second to Eurodollar  Rate
Borrowings.

                       Section 2.08. Interest Accrual, Payments. (a) Accrual and
Payment.  Subject to the  provisions  of Section  9.13,  the Borrower  shall pay
interest on the unpaid  principal amount of each Loan made by each Bank from the
date of such Loan  until such  principal  amount  shall be paid in full,  on the
dates and at the rates per annum specified as follows:

                       (i) Base Rate Loans.  If such Loan is a Base Rate Loan, a
rate per annum equal at all times to the lesser of (A) the  Highest  Lawful Rate
and (B) the Base Rate in effect from time to time plus the Applicable  Margin in
effect from time to time, and unpaid accrued interest on such Loans shall be due
and payable on each  Quarterly  Payment Date and on the date such Base Rate Loan
shall be paid in full;  provided,  however,  that if the  Borrower  has not been
notified  by the  Agent of the  amount  of such  accrued  interest  at least one
Business Day prior to such date, such accrued  interest shall be due and payable
one Business Day after the Borrower is notified of such amount.  (ii) Eurodollar
Rate Loans.  If such Loan is a  Eurodollar  Rate Loan, a rate per annum equal at

HOU04:43581.4







all times  during  the  Interest  Period  for such Loan to the lesser of (A) the
Highest  Lawful Rate and (B) the sum of the  Eurodollar  Rate for such  Interest
Period plus the Applicable Margin in effect as of the first day of such Interest
Period,  and unpaid  accrued  interest on such Loans shall be due and payable on
the last day of such Interest Period;  provided,  however,  that if the Borrower
has not been  notified  by the Agent of the amount of such  accrued  interest at
least one Business Day prior to such date,  such accrued  interest  shall be due
and payable one Business Day after the Borrower is notified of such amount.

Any amount of principal or, to the extent permitted by applicable law,  interest
which is not paid when due  (whether  at stated  maturity,  by  acceleration  or
otherwise)  shall bear  interest from the date on which such amount is due until
such  amount  is paid in full,  at a rate per  annum  equal at all  times to the
lesser of (A) the Highest  Lawful Rate and (B) the Base Rate in effect from time
to time during the applicable  period plus the Applicable  Margin in effect from
time to time during such period  plus two  percent  (2%) (the  "Default  Rate"),
payable on demand.

                       (b)  Determination of Interest Rates. (i) The Agent shall
give prompt  notice to the  Borrower  and each other member of the Bank Group of
the  applicable  interest  rate  determined  by the  Agent  hereunder  for  each
Borrowing.  Each  determination by the Agent of an interest rate hereunder shall
be conclusive and binding for all purposes, absent manifest error.

                       (ii) If the Majority  Banks shall,  at least one Business
Day before the date of any requested Eurodollar Rate Borrowing, notify the Agent
that the  Eurodollar  Rate  applicable  to such  Borrowing  will not  adequately
reflect  the  cost to  such  Banks  of  making,  funding  or  maintaining  their
respective  Eurodollar Rate Loans for such Borrowing,  the right of the Borrower
to select  Eurodollar Rate Loans for such Borrowing or any subsequent  Borrowing
shall be  suspended  until the Agent shall  notify the  Borrower  and each other
member of the Bank Group  that the  circumstances  causing  such  suspension  no
longer  exist,  and each Loan  comprising  such  Borrowing  shall be made as, or
Converted into, as applicable, a Base Rate Loan.

                       (c) Applicable  Margin. As used in this Agreement and the
other Loan Documents,  "Applicable  Margin" means,  as to Loans  consisting of a
single Borrowing,  a rate per annum determined by reference to the Type of Loans
comprising such Borrowing as follows:

                       (i) if the aggregate  amount of Loans  outstanding  as of
      the date of  determination  is equal to or greater than 66.7% of the Total
      Commitment as of such date,  then such rate per annum shall be one-half of
      one  percent  (1/2%)  for  Base  Rate  Loans,  and two  percent  (2%)  for
      Eurodollar Rate Loans;

                       (ii)   if the aggregate amount of Loans outstanding as

HOU04:43581.4






      of the date of  determination  is equal to or greater  than 33.3% but less
      than 66.7% of the Total  Commitment  as of such date,  such rate per annum
      shall be one-half  of one  percent  (1/2%) for Base Rate Loans and one and
      three-quarters (1 3/4%) for Eurodollar Rate Loans; and
                        (iii) if the aggregate amount of Loans outstanding as of
      the date of determination is less than 33.3% of the Total Commitment as of
      such date, such rate per annum shall be one-half of one percent (1/2%) for
      Base Rate Loans,  and one and one-quarter  percent (1 1/4%) for Eurodollar
      Rate Loans.

                       Section 2.09.  Optional Prepayments.  (a) The Borrower
may, from time to time on any Business Day, upon notice to the Agent stating the
proposed  date and aggregate  principal  amount  thereof,  and if such notice is
given the Borrower shall,  prepay the outstanding  principal  amount of the Base
Rate Loans (without premium or penalty) comprising part of the same Borrowing in
whole or ratably in part;  provided,  that any partial  prepayment  of such Base
Rate Loans shall be in an aggregate  principal amount of not less than $500,000.
The Borrower may from time to time upon at least three  Business Days' notice to
the Agent stating the proposed date and the aggregate  principal amount thereof,
and if such notice is given the Borrower shall, prepay the outstanding principal
amount of the  Eurodollar  Rate Loans  comprising  part of the same Borrowing in
whole  or  ratably  in  part;  provided,  that any  partial  prepayment  of such
Eurodollar Rate Loans shall be in an aggregate principal amount of not less than
$500,000 or an integral multiple of $100,000 in excess thereof.

                       (b)    Each prepayment of Loans made pursuant to this
Section 2.09 shall be accompanied  by a payment of accrued  interest to the date
of  such  prepayment  on the  principal  amount  prepaid.  In the  event  of any
prepayment  of a  Eurodollar  Rate Loan,  the  Borrower  shall be  obligated  to
reimburse the Banks in respect thereof pursuant to Section 2.13.

                       Section 2.10. Payments,  Notice of Certain Repayments and
Computations. (a) All payments of principal, interest, commitment fees and other
amounts hereunder, under the Notes and the other Loan Documents (other than Bank
Group  Derivatives)  shall  be made  in  Dollars  to the  Agent  at its  address
specified in Section 9.03 for the account of each of the Banks,  in  immediately
available  funds not later than 11:00 a.m. (New York time) on the date when due.
Upon receipt of such  payments,  the Agent will promptly cause to be distributed
like funds  relating to the payment of principal or interest or commitment  fees
ratably  (other than amounts  payable  pursuant to Section  2.12,  Section 2.13,
Section 2.14 or Section 2.15) to the Banks,  for the account of their respective
Applicable Lending Offices,  and like funds relating to the payment of any other
amount  payable  to any Bank,  to such Bank for the  account  of its  Applicable
Lending Office,  in each case to be applied in accordance with the terms of this
Agreement.

                       (b) Unless the Agent shall have received  notice from the
Borrower prior to the date on which any payment is due to the Banks under the

HOU04:43581.4






Loan  Documents  that the Borrower will not make such payment in full, the Agent
may assume that the  Borrower has made such payment in full to the Agent on such
date  and  the  Agent  may,  in  reliance  upon  such  assumption,  cause  to be
distributed to each Bank on such due date an amount equal to the amount then due
such Bank. If and to the extent the Borrower shall not have made such payment in
full to the Agent each Bank shall  repay to the Agent  forthwith  on demand such
amount  distributed  to such Bank,  together with interest  thereon for each day
from the date such amount is  distributed  to such Bank until the date such Bank
repays such amount to the Agent at the Federal Funds Rate.

                       (c)    All payments by the Borrower of the fees payable
to the Agent or the  Issuing  Bank  shall be made in  Dollars  directly  to such
Person at its address  specified in Section 9.03 in immediately  available funds
not later than 11:00 a.m. (New York time) on the date when due.

                       (d)    All computations of interest based on the Base
Rate  shall be made on the basis of a year of 365 or 366  days,  as the case may
be, and all computations of interest based on the Eurodollar Rate or the Federal
Funds Rate, as well as commitment  fees, shall be made on the basis of a year of
360 days (unless use of a 360 day year would cause the interest  contracted for,
charged or received  hereunder to exceed the Highest  Lawful Rate, in which case
such  computations  shall be made on the basis of a year of 365 or 366 days,  as
the case may be),  in each case for the  actual  number of days  (including  the
first day but  excluding  the last day)  occurring  in the period for which such
interest or commitment fees are payable.

                       (e)    Whenever any payment under the Loan
Documents  shall be stated to be due on a day other  than a Business  Day,  such
payment shall be made on the next succeeding Business Day, and such extension of
time shall in such case be included in the computation of payment of interest or
commitment  fee, as the case may be;  provided,  if such  extension  would cause
payment of interest on or principal of  Eurodollar  Rate Loans to be made in the
next following  calendar  month,  such payment shall be made on the  immediately
preceding Business Day.

                       (f)  If  any  Bank  shall  obtain  any  payment  (whether
voluntary,  involuntary,  through  the  exercise  of any  right  of  setoff,  or
otherwise)  on account of the Loans made by it (other  than  pursuant to Section
2.08(b),  Section 2.12, Section 2.13, Section 2.14 or Section 2.15), or payments
by the  Issuing  Bank made  pursuant to Section  2.03,  in excess of its ratable
share of payments  on account of the Loans or payments by the Issuing  Bank made
pursuant to Section 2.03,  obtained by all the Banks,  such Bank shall forthwith
purchase  from the other  Banks  such  participations  in the Loans made by such
other Banks, or the reimbursement  obligations in respect of the payments by the
Issuing  Bank made  pursuant  to Section  2.03,  as the case may be, as shall be
necessary to cause such purchasing Bank to share the excess payment ratably with
each of them.  The Borrower  agrees that any Bank so purchasing a  participation
from another Bank  pursuant to this Section  2.10(f) may, to the fullest  extent

HOU04:43581.4







permitted  by law and  this  Agreement,  exercise  all  its  rights  of  payment
(including the right of setoff) with respect to such  participation  as fully as
if such Bank were the  direct  creditor  of the  Borrower  in the amount of such
participation.

                       Section  2.11.  Fees.  (a) Subject to the  provisions  of
Section 9.13, the Borrower  agrees to pay to each Bank a commitment fee equal to
one-half of one percent  (1/2%) per annum on the average  unused  portion of the
Commitment  of such Bank in effect  from  time to time for the  period  from the
Execution  Date  to,  but  excluding,  the  Maturity  Date (or if  earlier,  the
termination in full of the Commitment). Accrued commitment fees shall be due and
payable in arrears on each  Quarterly  Payment Date in each year, on the date of
any reduction or  termination of the Commitment of such Bank and on the Maturity
Date (or if earlier,  the termination in full of the Commitment);  provided that
if the  Borrower  has not been  notified  by Agent of the  amount of such fee at
least one Business Day prior to any such date, such fee shall be due and payable
one Business  Day after the  Borrower is notified by Agent of such  amount,  and
shall be computed for the period  commencing  with the day to which such fee was
last paid (or, in the case of the first  commitment  fee payment  date,  for the
period commencing with and including the Execution Date) to the date such fee is
due and  payable.  Subject to the  provisions  of Section  9.13,  so long as any
Obligation  shall  remain  outstanding  or any Banks  shall have any  Commitment
hereunder  the Borrower  shall pay the Agent an annual  agency fee of $25,000 on
the Execution Date and on each anniversary date thereof.

                       (b) (i) The Borrower agrees to pay the Issuing Bank a fee
in respect of each Letter of Credit  issued for the account of the Borrower (the
"L/C Fees").  With respect to each Letter of Credit,  Borrower  agrees to pay an
L/C Fee, for the period from the date of issuance of such Letter of Credit in an
amount equal to 1 1/4 % per annum on the outstanding  face amount of such Letter
of Credit.  All L/C Fees shall be paid in immediately  available funds and shall
based on a 360 day year  and  actual  days  elapsed.  Accrued  L/C Fees for each
Letter of Credit shall be due and payable in arrears on each  Quarterly  Payment
Date and on the  termination or expiration  date of such Letter of Credit (or if
earlier, the termination in full of the Commitments).  The Issuing Bank shall be
entitled to retain,  solely for the Issuing Bank's account, .15% per annum as an
issuing fee on all Letters of Credit  (the  "Retained  L/C Fees") and pay to the
Agent for the pro rata benefit of the Banks all  remaining L/C Fees. In addition
to the L/C Fees, the Borrower shall pay the Issuing Bank, solely for the Issuing
Bank's account,  its customary  administrative  service charges  relating to the
issuance of,  amendment to, payment under and transfer of any Letters of Credit.
Such  amounts to be due and  payable  when such  services  are  rendered  by the
Issuing Bank.

                       (ii) On each  Quarterly  Payment  Date,  the Issuing Bank
shall pay the  aggregate  amount of all L/C Fees  collected  by the Issuing Bank
during the  quarterly  period then ended,  net of the amount of any Retained L/C
Fees retained by the Issuing Bank for such period, to the Agent. Upon receipt by
the Agent,  the Agent shall  distribute such net amount of L/C Fees to the Banks
ratably according to their respective  Commitment  Percentages.  Within ten (10)

HOU04:43581.4







Business Days after each  Quarterly  Payment Date, the Issuing Bank shall give a
written  report to the other  members  of the Bank  Group  specifying  the gross
amount of all L/C Fees collected by the Issuing Bank during the quarterly period
then ended,  the amount of all Retained L/C Fees, and the net amount of such L/C
Fees delivered to the Agent for distribution to the Banks.


                       Section 2.12.  Setoff, Counterclaims and Taxes.  (a) All
payments  of  principal,  interest,  expenses,   reimbursements,   compensation,
commitment fees, L/C Fees, arrangement fees or administration fees and any other
amount from time to time due under the Notes,  this  Agreement or any other Loan
Document shall be made by the Borrower  without setoff or counterclaim and shall
be made free and  clear of and  without  deduction  for any and all  present  or
future taxes,  levies,  imposts,  deductions,  charges or withholdings,  and all
liabilities with respect thereto,  excluding,  in the case of each member of the
Bank Group,  taxes imposed on its income,  and franchise taxes imposed on it, by
the  jurisdiction  under  the laws of which  such  member  of the Bank  Group is
organized or any  political  subdivision  thereof and, in the case of each Bank,
taxes  imposed  on its  income,  and  franchise  taxes  imposed  on  it,  by the
jurisdiction  of  such  Bank's  Applicable   Lending  Office  or  any  political
subdivision thereof (all such non-excluded taxes, levies,  imposts,  deductions,
charges, withholdings and liabilities being hereinafter referred to as "Taxes").
If the Borrower  shall be required by law to deduct any Taxes from or in respect
of any sum  payable  hereunder  or under any Loan  Document to any member of the
Bank Group,  (i) the sum payable  shall be increased as may be necessary so that
after  making  all  required  deductions  (including  deductions  applicable  to
additional  sums payable  under this Section 2.12) such member of the Bank Group
receives  an  amount  equal  to the  sum it  would  have  received  had no  such
deductions been made, (ii) the Borrower shall make such deductions and (iii) the
Borrower shall pay the full amount deducted to the relevant  taxation  authority
or other authority in accordance with applicable law.

                       (b) In addition,  the Borrower  agrees to pay any present
or future  stamp or  documentary  taxes or any other  excise or property  taxes,
charges or similar  levies which arise from any payment made  hereunder or under
the  Notes or the  other  Loan  Documents  or from the  execution,  delivery  or
registration of, or otherwise with respect to, this Agreement,  the Notes or the
other Loan Documents (hereinafter referred to as "Other Taxes").

                       (c) The Borrower will  indemnify  each member of the Bank
Group  for  the  full  amount  of  Taxes  or  Other  Taxes  (including,  without
limitation,  any Taxes or Other  Taxes  imposed by any  jurisdiction  on amounts
payable under this Section 2.12) paid, by such member of the Bank Group (whether
paid on its own behalf or on behalf of any other  member of the Bank  Group) and
any liability (including penalties,  interest and expenses) arising therefrom or
with respect thereto. This indemnification shall be made within 10 days from the
date such member of the Bank Group makes written demand therefor.

HOU04:43581.4






                       (d)  Within  30 days  after  the date of any  payment  of
Taxes,  the Borrower  will furnish to the Agent,  at its address  referred to in
Section 9.03, the original or a certified copy of a receipt  evidencing  payment
thereof.  If no Taxes are payable in respect of any payment  hereunder  or under
the Notes or the other Loan Documents, upon the reasonable request of the Agent,
the  Borrower  will  furnish to the Agent at its address  referred to in Section
9.03, a certificate from each  appropriate  taxing  authority,  or an opinion of
counsel  acceptable to the Agent stating that such payment is exempt from or not
subject to Taxes.

                       (e)  Without  prejudice  to the  survival  of  any  other
agreement of the Borrower  hereunder,  the  agreements  and  obligations  of the
Borrower contained in this Section 2.12 shall survive the payment in full of the
Credit  Outstanding  and all other amounts owing under the other Loan Documents.
The provisions of this Section 2.12 are in all respects  subject to Section 9.13
hereof.

                       (f) Each Bank  represents and warrants to the Agent,  the
Issuing  Bank,  the  Borrower and the  Guarantor  that such Bank is either (i) a
corporation  organized under the laws of the United States or a state thereof or
(ii) entitled to complete  exemption from United States  withholding tax imposed
on or with respect to any payments, including fees, to be made to it pursuant to
this Agreement and the other Loan Documents (x) under an applicable provision of
a tax  convention  to which the  United  States is a party or (y)  because it is
acting  through a branch,  agency or office in the United States and any payment
to be received by it hereunder is effectively connected with a trade or business
in the United  States.  Upon  becoming  a party to this  Agreement  (whether  by
assignment or as an original signatory  hereto),  and in any event, from time to
time upon the  request  of the Agent or the  Borrower,  each Bank which is not a
corporation  organized  under the laws of the United States or any state thereof
shall  deliver to the Agent and the Borrower such forms,  certificates  or other
instruments as may be required by the Agent in order to establish that such Bank
is entitled to complete  exemption from United States  withholding taxes imposed
on or with  respect to any  payments,  including  fees,  to be made to such Bank
under this  Agreement  and the other Loan  Documents.  Each Bank also  agrees to
deliver to the Borrower and the Agent and such other  supplemental  forms as may
at any time be  required  as a  result  of the  passage  of time or  changes  in
applicable  law or  regulation  in order to  confirm or  maintain  in effect its
entitlement to exemption from U.S.  withholding  tax on any payments  hereunder;
provided, that the circumstances of the Bank at the relevant time and applicable
laws  permit it to do so.  If a Bank  determines,  as a result of any  change in
either (1) applicable law, regulation or treaty, or in any official  application
thereof  or (2) its  circumstances,  that it is  unable  to  submit  any form or
certificate that it is obligated to submit pursuant to this Section 2.12(f),  or
that it is  required  to  withdraw  or  cancel  any  such  form  or  certificate
previously  submitted,  it shall  promptly  notify the Borrower and the Agent of
such fact. If a Bank is organized  under the laws of a jurisdiction  outside the
United  States,  and the  Borrower  and  the  Agent  have  not  received  forms,
certificates  or other  instruments  indicating to their  satisfaction  that all
payments to be made to such Bank hereunder or under the Guaranty are not subject
to United States  withholding  tax or the Agent  otherwise has reason to believe

HOU04:43581.4







that  such  Bank is  subject  to U.S.  withholding  tax,  the  Borrower  and the
Guarantor  shall withhold  taxes from such payments at the applicable  statutory
rate.  Each Bank shall  indemnify  and hold the  Borrower,  the  Guarantor,  the
Issuing Bank and the Agent  harmless from any United  States  taxes,  penalties,
interest and other  expenses,  costs and losses incurred or payable by them as a
result of either (A) such Bank's failure to submit any form or certificate  that
it is required to provide  pursuant to this  Section  2.12(f) or (B) reliance by
the Borrower,  the Guarantor,  the Issuing Bank or the Agent on any such form or
certificate  which  such Bank has  provided  to them  pursuant  to this  Section
2.12(f).


HOU04:43581.4






                       Section 2.13.  Funding Losses.  The Borrower shall
indemnify each Bank against any loss or reasonable expense  (including,  but not
limited  to, any loss or  reasonable  expense  sustained  or  incurred  or to be
sustained or incurred in liquidating or reemploying  deposits from third parties
acquired to effect or  maintain  such Loan or any part  thereof as a  Eurodollar
Rate Loan)  which such Bank may  sustain  or incur as a  consequence  of (a) any
failure by the Borrower to fulfill on the date of any  Borrowing  hereunder  the
applicable  conditions set forth in Article III, (b) any failure by the Borrower
to borrow  hereunder,  or to  Convert  Loans  hereunder  or to cause a Letter of
Credit to be issued  after a  Borrowing  Request,  Letter of Credit  Request  or
Conversion Notice, respectively,  has been given, (c) any payment, prepayment or
Conversion  of a  Eurodollar  Rate  Loan  required  or  permitted  by any  other
provisions of this Agreement,  including, without limitation,  payments made due
to the  acceleration  of the maturity of the Notes  pursuant to Section 7.01, or
otherwise  made on a date  other  than the last day of the  applicable  Interest
Period,  (d) any default in the payment or prepayment of the principal amount of
any Loan or any part thereof or interest  accrued  thereon,  as and when due and
payable (at the due date  thereof,  by notice of prepayment or otherwise) or (e)
the  occurrence of an Event of Default.  Such loss or  reasonable  expense shall
include,  without  limitation,  an  amount  equal  to the  excess,  if  any,  as
determined  by each  Bank of (i) its cost of  obtaining  the  funds for the Loan
being paid,  prepaid or Converted  or not  borrowed or  Converted  (based on the
Eurodollar  Rate  applicable  thereto)  for the  period  from  the  date of such
payment,  prepayment  or  Conversion or failure to borrow or Convert to the last
day of the Interest Period for such Loan (or, in the case of a failure to borrow
or Convert,  the Interest  Period for the Loan which would have commenced on the
date of such failure to borrow or Convert)  over (ii) the amount of interest (as
estimated by such Bank) that would be realized by such Bank in  reemploying  the
funds so paid, prepaid or Converted or not borrowed or Converted for such period
or Interest Period, as the case may be. A certificate of each Bank setting forth
any amount or amounts  which such Bank is entitled  to receive  pursuant to this
Section 2.13 shall be  delivered  to the Borrower  (with a copy to the Agent and
the Co-Agent) and shall be conclusive,  if made in good faith,  absent  manifest
error.  The  Borrower  shall pay to the Agent for the  account  of each Bank the
amount shown as due on any  certificate  within 10 days after its receipt of the
same.  Notwithstanding the foregoing, in no event shall any Bank be permitted to
receive  any  compensation  hereunder  constituting  interest  in  excess of the
Highest Lawful Rate.  Without prejudice to the survival of any other obligations
of the Borrower  hereunder,  the  obligations of the Borrower under this Section
2.13 shall  survive  the  termination  of this  Agreement  and/or the payment or
assignment of any of the Notes.

                       Section 2.14.  Change of Law. (a) If at any time any Bank
determines  in good faith (which  determination  shall be  conclusive)  that any
change in any  applicable  law,  rule or  regulation  or in the  interpretation,
application or administration  thereof makes it unlawful, or any central bank or
other Governmental  Authority asserts that it is unlawful,  for such Bank or its
foreign branch or branches to fund or maintain any Eurodollar  Rate Loan (any of
the foregoing  determinations being a "Eurodollar  Event"),  then, such Bank, at
its option,  may: (i) declare that  Eurodollar Rate Loans will no longer be made

HOU04:43581.4







or  maintained  by such  Bank,  whereupon  the right of the  Borrower  to select
Eurodollar Rate Loans for any Borrowing shall be suspended until such Bank shall
notify the Agent that the circumstances  causing such Eurodollar Event no longer
exist;  (ii)  with  respect  to any  Eurodollar  Rate  Loans of such  Bank  then
outstanding,  require that all such  Eurodollar  Rate Loans be Converted to Base
Rate Loans, in which event all such Eurodollar Rate Loans shall automatically be
Converted  into Base Rate  Loans on the  effective  date of such  notice and all
payments or  prepayments  of principal that would have otherwise been applied to
repay such Converted Eurodollar Rate Loans shall instead be applied to repay the
Base Rate Loans resulting from such Conversion; and/or (iii) with respect to any
Eurodollar  Rate Loans  requested  of such Bank but not yet made as or Converted
into such, require that such Eurodollar Rate Loans be made as or Converted into,
as applicable, Base Rate Loans.

                       (b) Upon the occurrence of any Eurodollar  Event,  and at
any time thereafter so long as such Eurodollar  Event shall continue,  such Bank
may exercise its aforesaid  option by giving written notice thereof to the Agent
and the  Borrower,  such  notice to be  effective  upon  receipt  thereof by the
Borrower.  Any  Conversion of any  Eurodollar  Rate Loan which is required under
this Section 2.14 shall be made,  together with accrued and unpaid  interest and
all other amounts payable to such Bank under this Agreement with respect to such
Converted Loan  (including,  without  limitation,  amounts  payable  pursuant to
Section 2.13 hereof),  on the date stated in the notice to the Borrower referred
to above.

                       Section 2.15.  Increased Costs. (a) If, due to either (i)
the  introduction  of or any  change in or in the  interpretation  of any law or
regulation or (ii) the compliance  with any guideline  issued or request made by
any  central  bank or other  Governmental  Authority  (whether or not having the
force of law) after the date hereof,  there shall be any increase in the cost to
any Bank of agreeing to make or making,  funding or maintaining  Eurodollar Rate
Loans,  then the Borrower shall from time to time,  subject to the provisions of
Section 9.13, pay to the Agent for the account of such Bank  additional  amounts
sufficient to compensate  such Bank for such  increased cost upon demand by such
Bank.

                       (b) If any Bank shall have  determined in good faith that
any law, rule, regulation or guideline adopted after the date hereof pursuant to
or  arising  out of the July  1988  report  of the Basle  Committee  on  Banking
Regulations and Supervisory  Practices  entitled  "International  Convergence of
Capital  Measurement and Capital  Standards" or that the adoption after the date
hereof of any applicable law, rule,  regulation or guideline  regarding  capital
adequacy,  or any change after the date hereof in any of the foregoing or in the
interpretation  or   administration   thereof  by  any  central  bank  or  other
Governmental   Authority  charged  with  the  interpretation  or  administration
thereof,  or compliance  by such Bank (or any lending  office of such Bank) with
any request or directive  regarding  capital adequacy (whether or not having the
force of law) of any such Governmental  Authority or comparable agency,  affects
or would affect the amount of capital  required or expected to be  maintained by
such Bank or any corporation controlling such Bank, then the Borrower shall from

HOU04:43581.4







time to time,  subject to the  provisions of Section 9.13, pay to such Bank upon
demand additional amounts sufficient to compensate such Bank or such corporation
in the light of such  circumstances,  to the  extent  that such Bank  reasonably
determines  such  increase in capital to be allocable  to the  existence of such
Bank's Commitment hereunder.

                       (c) If any law,  executive order or regulation is adopted
or  interpreted  by any central  bank or other  Governmental  Authority so as to
affect any of the Borrower's  obligations or the compensation to any Bank or the
Issuing Bank in respect of the Letters of Credit or the cost to such Bank or the
Issuing Bank of  establishing  and/or  maintaining the Letters of Credit (or any
participation  therein),  then the Borrower shall from time to time upon demand,
subject to the  provisions of Section 9.13,  reimburse or indemnify such Bank or
the Issuing Bank, as the case may be, with respect  thereto so that such Bank or
the Issuing  Bank, as the case may be, shall be in the same position as if there
had been no such adoption or interpretation.

                       (d) Each Bank or the  Issuing  Bank,  as the case may be,
will notify the Borrower of any event occurring after the date of this Agreement
which  will  entitle  such  Bank or the  Issuing  Bank,  as the case may be,  to
compensation pursuant to this Section 2.15 as promptly as practicable after such
Bank obtains  knowledge of the  occurrence of such event.  A certificate of such
Bank or the Issuing Bank, as the case may be, setting forth in reasonable detail
(i) such amount or amounts as shall be  necessary  to  compensate  such Bank (or
participating  banks or other entities  pursuant to Section 9.02) or the Issuing
Bank, as the case may be, as specified  above and (ii) the  calculation  of such
amount or amounts  shall be delivered  to the  Borrower and shall be  conclusive
absent  manifest  error.  The Borrower  shall pay to such Bank or to the Issuing
Bank, as the case may be, the amount shown as due on any such certificate within
ten (10) days  after its  receipt  of the same.  The  failure of any Bank or the
Issuing  Bank to demand  compensation  for any  increased  costs or reduction in
amounts  received or  receivable  or  reduction  in return on capital  shall not
constitute  a waiver of the right of such Bank,  any other  Bank or the  Issuing
Bank, to demand  compensation  for any  increased  costs or reduction in amounts
received or  receivable or reduction in return on capital as such rights are set
forth  herein.  The  protection  of this  Section 2.15 shall be available to the
Issuing Bank and the Banks  regardless of any possible  contention of invalidity
or  inapplicability  of law,  regulation  or  condition  which  shall  have been
imposed.


HOU04:43581.4






                              ARTICLE III
                          CONDITIONS OF CREDIT

                       Section 3.01.  Conditions Precedent to Effectiveness, the
Initial  Borrowing or Letter of Credit.  The effectiveness of this Agreement and
the  obligation  of each Bank to make its  initial  Loan on the  occasion of the
initial  Borrowing  hereunder or the obligation of the Issuing Bank to issue the
initial  Letter  of Credit  hereunder,  as the case may be,  is  subject  to the
conditions precedent that the Agent shall have received on or before the date of
such initial Borrowing or initial Letter of Credit,  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)    The following Loan Documents duly executed by
the Persons indicated below:

                       (i)    this Agreement executed by the Borrower and
      each member of the Bank Group,

                       (ii)   the Notes executed by the Borrower,

                       (iii)  the New Mortgage executed by the Borrower,

                       (iv)   the Mortgage Amendment amending the Existing
      Mortgage executed by the Borrower, and

                       (v)    the Guaranty executed by the Guarantor.

                       (b)  Evidence  that the  Liens  created  by the  Security
Documents have been duly perfected, or will be duly perfected upon the filing of
the instruments  referred to in subsections  (i) and (ii) below,  and constitute
valid first priority Liens, which shall include, without limiting the generality
of the foregoing:

                       (i)  the   delivery  to  the  Agent  of  such   financing
      statements   under  the  Uniform   Commercial  Code  for  filing  in  such
      jurisdictions as the Agent may require, and

                       (ii) the  delivery to the Agent of the New  Mortgage  and
      the Mortgage  Amendment for filing in such  jurisdictions as the Agent may
      require.

                       (c) 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 the Loan Documents to
which  it is or will be a party  and the  Borrowings  to be made or  Letters  of
Credit  to be  issued  thereunder  and  the  consummation  of  the  transactions
contemplated  thereby, (B) authorizing officers of the Borrower to negotiate the

HOU04:43581.4







Loan Documents to which it is a party and which will be delivered at or prior to
the date of the  initial  Borrowing  or  Letter of  Credit  and (C)  authorizing
officers of the  Borrower to execute and deliver the Loan  Documents to which it
is or will be a party and any related documents,  including, without limitation,
any agreement or security document contemplated by this Agreement, (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.

                       (d) A  certificate  of  the  secretary  or  an  assistant
secretary of the Guarantor  certifying,  inter alia, (i) true and correct copies
of  resolutions  adopted  by  the  Board  of  Directors  of  the  Guarantor  (A)
authorizing the execution, delivery and performance by the Guarantor of the Loan
Documents  to  which  it is or  will  be a party  and  the  consummation  of the
transactions  contemplated thereby, (B) authorizing officers of the Guarantor to
negotiate the Loan  Documents to which it is a party and which will be delivered
at or prior to the date of the  initial  Borrowing  or Letter of Credit  and (C)
authorizing  officers of the Guarantor to execute and deliver the Loan Documents
to which it is or will be a party and any related documents,  including, without
limitation,  any agreement or security document  contemplated by this Agreement,
(ii) true and correct  copies of the  articles of  incorporation  and bylaws (or
other similar  charter  documents) of the Guarantor and (iii) the incumbency and
specimen  signatures of the officers of the Guarantor executing any documents on
behalf of it.

                       (e)  Certificates of appropriate  public  officials as to
the existence  and good standing of the Borrower in the States of Texas,  Nevada
and Wyoming.

                       (f)  Certificates of appropriate  public officials as the
existence and good standing of the Guarantor in Alberta, Canada.

                       (g)  An  engineering   report  covering  the  Acquisition
Properties  and the other Oil and Gas  Properties  of the  Borrower  prepared by
DeGolyer  and  MacNaughton  dated  as of June 30,  1996  (the  "Initial  Reserve
Report").

                       (h)  Evidence  satisfactory  to the Agent that all of the
conditions  to the  Initial  Purchaser's  obligation  under  the  Bond  Purchase
Agreement have been satisfied and that the Bond Offering has been consummated in
accordance with the Bond Purchase Agreement and all Requirements of Law.

                       (i) Evidence satisfactory to the Agent that the Guarantor
has  acquired  all of the  outstanding  capital  stock of CGGS and that CGGS has
merged with and into the Guarantor.

                       (j) Evidence satisfactory to the Agent that the Portilla-
Happy Acquisition has been consummated in accordance with the Portilla-Happy

HOU04:43581.4






                       Acquisition  Documents  and all  Requirements  of Law and
original  counterparts  of  the  assignment  of the  Portilla-Happy  Acquisition
Properties to the Borrower.

                       (k) A portion of the proceeds of the Bond Offering  shall
have been used to repay in full all Obligations accrued or otherwise outstanding
under the Original Credit Agreement.

                       (l)  Evidence  of payment  in full of the  Portilla-Happy
Debt and fully  executed  and  acknowledged  releases  of all Liens  existing as
security for the Portilla-Happy Debt, in form, scope and substance  satisfactory
to the Agent.

                       (m) Title opinions  covering at least 80% of the value of
the Borrower's Oil and Gas Properties  included in the Initial Reserve Report in
form, scope and substance satisfactory to the Agent.

                       (n) Copies of all  authorizations,  consents,  approvals,
licenses,  filings or registrations  obtained from or made with any Governmental
Authority  or any  other  Person  in  connection  with  the Bond  Offering,  the
Acquisition or the execution,  delivery and  performance of the Loan  Documents,
together  with a certificate  from a Responsible  Officer of the Borrower to the
effect that all such authorizations,  consents, approvals,  licenses, filings or
registrations  have been obtained or made, as applicable,  and are in full force
and effect.

                       (o) A list of all  insurance  policies  and  programs  in
effect with respect to the  properties  and  businesses  of the Borrower and its
Subsidiaries, specifying for each such policy or program the amount thereof, the
risks insured  against  thereby,  the name of the insurer and each insured party
thereunder and the policy or other identification number thereof,  together with
a certificate from a Responsible  Officer of the Borrower to the effect that all
such policies and programs are in full force and effect.

                       (p) A satisfactory review of Borrower, including a review
of its marketing, transportation and hedging arrangements for Hydrocarbons.

                       (q) A certificate signed by a Responsible  Officer of the
Borrower  certifying  as to the  satisfaction  of the  conditions  specified  in
Section 3.02(a).

                       (r)  The  favorable,  signed  opinions  of  Cox  &  Smith
Incorporated,  special  counsel to the  Borrower and its  Subsidiaries,  Burnet,
Duckworth & Palmer,  special  Canadian  counsel to the Guarantor,  and Stikeman,
Elliott,  special  Canadian  counsel  to the  Agent  and the  Bank  Group,  each
addressed  to the Agent and the Bank  Group,  in form and  substance  reasonably
satisfactory to the Agent and its counsel.

                       (s) A written  confirmation from the Process Agent of its
appointment and acceptance as process agent for the Guarantor as provided for

HOU04:43581.4






in the Guaranty.

                       (t) The payment to the Bank Group of the fees due to them
as of such date under the Loan Documents.

                       (u) Such other  documents,  certificates  and opinions as
the Agent may reasonably  request  relating to this Agreement and the other Loan
Documents.

                       Section  3.02.  Conditions  Precedent  to All  Letters of
Credit and Loans.  The  obligation  of the  Issuing  Bank to issue any Letter of
Credit,  and of each  Bank to make any Loan,  shall be  subject  to the  further
conditions precedent that (a) on the Borrowing Date of such Loan or the issuance
date of such  Letter of  Credit,  as the case may be, the  following  statements
shall be true,  and the  Borrower,  by virtue  of its  delivery  of a  Borrowing
Request or a Letter of Credit  Request,  as applicable,  shall be deemed to have
certified  to the Bank  Group as of such date that (i) the  representations  and
warranties  contained in Article IV are true and correct on and as of such date,
before and after giving effect to such Loan or Letter of Credit, as the case may
be,  and as though  made on and as of such  date,  (ii) no  Default  or Event of
Default has occurred and is continuing, or would result from such Loan or Letter
of  Credit,  as the case may be,  and  (iii) no event  has  occurred  since  the
Execution  Date that could  reasonably  be expected  to have a Material  Adverse
Effect on the Borrower or any of its  Subsidiaries  and (b) that the Agent shall
have  received  on or  before  such  date such  other  documents,  certificates,
information  and opinions as the Agent may reasonably  request  relating to this
Agreement and the other Loan  Documents,  each in form and substance  reasonably
satisfactory to the Agent.


                               ARTICLE IV
                     REPRESENTATIONS AND WARRANTIES

                       In order to  induce  the Bank  Group to enter  into  this
Agreement,  the  Borrower  hereby  represents  and warrants to the Bank Group as
follows:  Section  4.01.  Corporate  Existence.  Each  of the  Borrower  and its
Subsidiaries  is a  corporation  duly  organized,  validly  existing and in good
standing under the laws of the  jurisdiction of its  incorporation,  and is duly
qualified or licensed to transact  business as a foreign  corporation  and is in
good standing  under the laws of each  jurisdiction  in which the conduct of its
operations  or  the  ownership  or  leasing  of  its  properties  requires  such
qualification  or  licensing,  except  where the failure to be so  qualified  or
licensed will not have a Material  Adverse Effect on such Person.  Schedule 4.01
is a complete list of the Borrower's Subsidiaries.

                       Section 4.02.  Corporate Authority; Binding Obligations.
Each of the Borrower and its  Subsidiaries has all requisite corporate power and

HOU04:43581.4






authority to conduct its  business,  to own,  operate and encumber its Property,
and to  execute,  deliver  and  perform  all of its  obligations  under the Loan
Documents  executed  by, or to be  executed  by,  such  Person.  The  execution,
delivery and  performance of each of the Loan Documents to which the Borrower or
any of its  Subsidiaries  is a party and the  consummation  of the  transactions
contemplated  thereby  have  been duly  authorized  by all  necessary  corporate
action.  Each  of  the  Loan  Documents  to  which  the  Borrower  or any of its
Subsidiaries is a party has been duly executed and delivered by such Person,  is
in full force and effect and constitutes the legal, valid and binding obligation
of such Person,  enforceable  against it in accordance with its terms, except as
such  enforceability may be limited by bankruptcy,  insolvency,  reorganization,
moratorium or other similar laws affecting the enforcement of creditor's  rights
generally and general  principles of equity. The Security Documents create valid
Liens in the  collateral  described  therein,  securing the secured  obligations
described therein.

                       Section 4.03. No Conflict.  The  execution,  delivery and
performance by the Borrower or any of its  Subsidiaries of each Loan Document to
which such Person is a party and the  consummation  of each of the  transactions
contemplated  thereby do not and shall not, by the lapse of time,  the giving of
notice or otherwise:  (a) constitute a violation of any  Requirement of Law or a
breach  of  any  provision   contained  in  the  articles  or   certificate   of
incorporation or bylaws of such Person, or any shareholder  agreement pertaining
to such Person, or contained in any material  agreement,  instrument or document
to which it is now a party or by which it or its properties is bound, except for
such violations or breaches that will not have a Material  Adverse Effect on any
such Person;  or (b) result in or require the creation or imposition of any Lien
whatsoever  upon any of the  properties  or assets of the Borrower or any of its
Subsidiaries  (other than Excepted Liens and Liens in favor of the Agent arising
pursuant to the Loan Documents).

                       Section  4.04.  No Consent.  No  authorization,  consent,
approval,  license,  or  exemption  of  or  filing  or  registration  with,  any
Governmental Authority or any other Person, which has not been obtained, was, is
or will be necessary for the valid  execution,  delivery or  performance  by the
Borrower or any of its  Subsidiaries of any of the Loan Documents to which it is
a party and the consummation of each of the transactions contemplated thereby or
the Borrower's or any of its Subsidiaries' ownership, use or operation of any of
their Properties other than (a) those listed on Schedule 4.04 and (b) those that
the failure to obtain,  file or make will not have a Material  Adverse Effect on
any such Person.

                       Section  4.05.  No  Defaults  or  Violations  of Law.  No
Default or Event of Default has occurred and is continuing. No default (or event
or  circumstance  occurred  which,  but for the passage of time or the giving of
notice, or both, would constitute a default) has occurred and is continuing with
respect to any note, indenture,  loan agreement,  mortgage, lease, deed or other
agreement  to which the  Borrower  or any of its  Subsidiaries  is a party or by
which any of them or their  Properties  is bound,  except for such defaults that
will  not  have  a  Material  Adverse  Effect  on  the  Borrower  or  any of its
Subsidiaries. Neither the Borrower nor

HOU04:43581.4






any of its  Subsidiaries  is in violation of any  applicable  Requirement of Law
except for such violations  that will not have a Material  Adverse Effect on any
such Person.

                       Section  4.06.  Financial  Position.  (a)  Prior  to  the
Execution  Date,  the  Borrower  has  furnished  to the Agent and the Bank Group
audited  financials of the Borrower and its Subsidiaries as of December 31, 1995
and  unaudited  financials  of the  Borrower  as of June 30,  1996.  The audited
financials referred to in the previous sentence have been prepared in accordance
with generally accepted accounting  principles  consistently  applied throughout
the periods involved and present fairly the financial  condition of the Borrower
and its Subsidiaries as of the dates thereof and the results of their operations
for the periods then ended. No event has occurred since June 30, 1996 that could
reasonably be expected to have a Material  Adverse Effect on the Borrower or any
of its Subsidiaries.

                       (b) Except as fully  reflected in the audited  financials
referred to in paragraph (a) of this Section 4.06, as of the date hereof,  there
are no liabilities or obligations of the Borrower or any of its  Subsidiaries of
any nature whatsoever  (whether absolute,  accrued,  contingent or otherwise and
whether or not due) which,  either  individually  or in aggregate,  would have a
Material Adverse Effect on the Borrower or any of its Subsidiaries.

                       Section 4.07.  Litigation.  Except as set out in Schedule
4.07, there are no actions, suits or proceedings pending or, to the knowledge of
the  Borrower  threatened  against  or  affecting  the  Borrower  or  any of its
Subsidiaries,   or  the  Properties  of  any  such  Person,  before  or  by  any
Governmental  Authority or other Person,  which, if determined adversely to such
Person could have a Material Adverse Effect on any such Person.

                       Section 4.08. Use of Proceeds. (a) The Borrower's uses of
the proceeds of the Loans and of the Letters of Credit are, and will continue to
be, legal and proper  corporate  uses (duly  authorized by  Borrower's  board of
directors),  and such uses are consistent  with the terms of the Loan Documents,
including, without limitation, Section 5.09, and all Requirements of Law.

                       (b) Neither the Borrower nor any of its  Subsidiaries  is
engaged in the business of  extending  credit for the purpose of  purchasing  or
carrying  margin stock (within the meaning of Regulation  U), and no part of the
proceeds of any Loan or Letter of Credit will be used,  directly or  indirectly,
(i) to purchase or carry any margin stock or to extend  credit to others for the
purpose of  purchasing  or carrying  any margin stock or (ii) for the purpose of
purchasing, carrying or trading in any securities under such circumstances as to
involve the Borrower or any of its Subsidiaries in a violation of Regulation X.

                       Section  4.09.  Governmental   Regulation.   Neither  the
Borrower nor any of its  Subsidiaries is subject to regulation  under the Public
Utility Holding Company Act, as amended,  the Investment Company Act of 1940, as
amended,  or any  other  Requirement  of Law such that the  ability  of any such

HOU04:43581.4







Person to incur  indebtedness  is  limited  or its  ability  to  consummate  the
transactions  contemplated  by this  Agreement,  the other Loan Documents or any
document executed in connection therewith is impaired.

                       Section  4.10.  Disclosure.  The  schedules,   documents,
exhibits,  reports,  certificates  and other written  statements and information
furnished by or on behalf of the Borrower or any of its Subsidiaries to the Bank
Group do not  contain  any  Material  misstatement  of fact,  or omit to state a
Material fact necessary in order to make the statements  contained  therein,  in
light of the circumstances  under which they were made, not misleading.  Neither
the Borrower nor any of its  Subsidiaries  has  intentionally  withheld any fact
known to it which has or is reasonably  likely to have a Material Adverse Effect
on the Borrower or any of its Subsidiaries.

                       Section 4.11.  ERISA.  (a)  The Borrower, and each ERISA
Affiliate and Subsidiary  have operated and  administered  each Pension Plan and
Other  Benefit Plan in  compliance  with all  applicable  laws,  except for such
instances of  noncompliance  as have not resulted in and could not reasonably be
expected to result in a Material  Adverse  Effect.  Neither the Borrower nor any
ERISA Affiliate or Subsidiary has incurred any liability  pursuant to Title I or
IV of ERISA or the penalty or excise tax provisions of the Internal Revenue Code
relating to employee  benefit  plans (as defined in Section 3 of ERISA),  and no
event,  transaction  or condition has occurred or exists or is  threatened  that
could  reasonably be expected to result in the  incurrence of any such liability
by the Borrower or any ERISA  Affiliate or  Subsidiary,  or in the imposition of
any Lien on any of the rights, properties or assets of the Borrower or any ERISA
Affiliate or Subsidiary, in either case pursuant to Title I or IV of ERISA or to
such penalty or excise tax  provisions  or to Section  401(a)(29)  or 412 of the
Internal  Revenue Code,  other than such  liabilities  or Liens as would not be,
individually or in the aggregate, Material.

                       (b)  The   present   value  of  the   aggregate   benefit
liabilities under each Pension Plan subject to Title IV of ERISA,  determined as
of the end of such Pension  Plan's most recently ended plan year on the basis of
the actuarial  assumptions specified for funding purposes in such Pension Plan's
most recent actuarial  valuation  report,  did not exceed the aggregate  current
value of the assets of such Pension Plan allocable to such benefit  liabilities.
The term  "benefit  liabilities"  has the meaning  specified  in section 4001 of
ERISA and the  terms  "current  value"  and  "present  value"  have the  meaning
specified in Section 3 of ERISA.

                       (c)  The   Borrower   and  its   ERISA   Affiliates   and
Subsidiaries  do not  currently  and have never had any  liability or obligation
with respect to any  liabilities  (and are not subject to contingent  withdrawal
liabilities)  under  section  4201 or 4204 of any  Multiemployer  Plan.  (d) The
expected  post-retirement  benefit obligation  (determined as of the last day of
the  Borrower's  most recently  ended fiscal year in accordance  with  Financial

HOU04:43581.4







Accounting  Standards  Board  Statement No. 106,  without  regard to liabilities
attributable to continuation  coverage mandated by section 4980B of the Internal
Revenue  Code   ("COBRA"))  of  the  Borrower  and  its  ERISA   Affiliates  and
Subsidiaries is not Material and, except as modified by COBRA,  such obligations
can be  unilaterally  terminated  at any  time  by the  Borrower,  or its  ERISA
Affiliates and Subsidiaries without any Material liability.

                       Section 4.12.  Payment of Taxes.  The Borrower has filed,
and has caused each of its  Subsidiaries  to file, all federal,  state and local
tax returns and other  reports that the Borrower  and each such  Subsidiary  are
required by law to file and have paid all taxes and other  similar  charges that
are due and payable  pursuant to such returns and reports,  except to the extent
any of the same  may be  contested  in good  faith  by  appropriate  proceedings
promptly initiated and diligently conducted,  and with respect to which adequate
reserves  have  been set aside on the books of such  Person in  accordance  with
generally accepted accounting principles.

                       Section 4.13.  Title and Liens.  (a) Except as set out in
Schedule 4.13 the Borrower and its  Subsidiaries  have good and defensible title
to its Properties, free and clear of all Liens except Liens permitted by Section
6.02.  Except as set forth in  Schedule  4.13,  after  giving full effect to the
Excepted Liens,  the Borrower owns the net interests in production  attributable
to the Oil and Gas  Properties  reflected in the Initial  Reserve Report and the
ownership  of such Oil and Gas  Properties  shall  not in any  material  respect
obligate  the  Borrower  to  bear  the  costs  and  expenses   relating  to  the
maintenance,  development and operations of each such Oil and Gas Property in an
amount in excess of the working  interest of each Oil and Gas Property set forth
in the Initial  Reserve Report.  Further,  upon delivery of each Reserve Report,
the statements made in the preceding sentence shall be true with respect to such
furnished  Reserve Reports including the ownership of the Oil and Gas Properties
set forth therein.  To the best of the  Borrower's  knowledge,  all  information
contained  in the Initial  Reserve  Report is true and  correct in all  material
respects as of the date thereof.

                       (b) All material leases and agreements  necessary for the
conduct of the  business  of the  Borrower  and its  Subsidiaries  are valid and
subsisting,  in full force and effect and,  to the  knowledge  of the  Borrower,
there exists no default or event or circumstance which with the giving of notice
or the passage of time or both would give rise to a default under any such lease
or  leases,  which  would  affect in any  material  respect  the  conduct of the
business of the Borrower and its Subsidiaries.

                       (c) The rights,  properties  and other  assets  presently
owned,  leased or  licensed  by the  Borrower  and its  Subsidiaries  including,
without  limitation,  all  easements  and  rights of way,  include  all  rights,
properties   and  other  assets   necessary  to  permit  the  Borrower  and  its
Subsidiaries  to conduct  their  business in all  material  respects in the same
manner as their business has been conducted prior to the date hereof.


HOU04:43581.4






                       (d) All of the assets and  properties of the Borrower and
its  Subsidiaries  which  are  reasonably  necessary  for the  operation  of its
business are in good working  condition and are  maintained  in accordance  with
prudent business standards.

                       Section  4.14.  Gas  Imbalances.  As of the  date of this
Agreement,  except  as  set  forth  in  Schedule  4.14  or on  the  most  recent
certificate  delivered pursuant to Section 5.10(c),  on a net basis there are no
gas imbalances,  take or pay or other prepayments with respect to the Borrower's
Oil and Gas Properties which would require the Borrower to deliver  Hydrocarbons
produced  from the Oil and Gas  Properties  at some future time  without then or
thereafter  receiving full payment therefor exceeding a market value of $100,000
in the aggregate.

                       Section 4.15.  Environmental Matters. Except as disclosed
in the  environmental  reports  delivered  to the  Bank  Group  pursuant  to the
Original Credit Agreement or Section 3.01 hereof,  (a) (i) the Borrower and each
of its  Subsidiaries  possess  all  environmental,  health and safety  licenses,
permits, authorizations,  registrations,  approvals and similar rights necessary
under law or otherwise  for such Person to conduct its  operations  as now being
conducted, (ii) each of such licenses, permits,  authorizations,  registrations,
approvals and similar rights is valid and  subsisting,  in full force and effect
and enforceable by such Person,  and (iii) such Person is in compliance with all
terms,   conditions  or  other  provisions  of  such  permits,   authorizations,
registrations,  approvals  and  similar  rights,  except to the extent  that the
failure to do so will not have a Material  Adverse  Effect on such  Person;  (b)
neither the Borrower nor any of its Subsidiaries has received any notices of any
violation of, noncompliance with, or remedial obligation under,  Requirements of
Environmental  Laws,  and there are no writs,  injunctions,  decrees,  orders or
judgments  outstanding,  or lawsuits,  claims,  proceedings,  investigations  or
inquiries pending or, to the knowledge of the Borrower, threatened,  relating to
the  ownership,  use,  condition,  maintenance,  or operation  of, or conduct of
business  related to, any Property owned,  leased or operated by the Borrower or
any  of  its   Subsidiaries,   other  than  those   violations,   instances   of
noncompliance,  obligations,  writs,  injunctions,  decrees, orders,  judgments,
lawsuits, claims, proceedings,  investigations or inquiries that will not have a
Material Adverse Effect on such Person;  (c) there are no material  obligations,
undertakings or liabilities  arising out of or relating to Environmental Laws to
which  the  Borrower  or any of its  Subsidiaries  has  agreed  to,  assumed  or
retained,  or by which the  Borrower  or any of its  Subsidiaries  is  adversely
affected, by contract or otherwise;  and (d) neither the Borrower nor any of its
Subsidiaries  has  received a written  notice or claim to the  effect  that such
Person  is or may be  liable  to  any  Person  as the  result  of a  release  or
threatened release of a hazardous material or solid waste.



HOU04:43581.4






                               ARTICLE V
                         AFFIRMATIVE COVENANTS

                       So long as any Letter of Credit remains outstanding,  any
principal  amount  of any  Loan,  any  principal  amount  of  any  reimbursement
obligation  in respect of any Letter of Credit,  any amount of interest  accrued
under the Notes or in  respect of any Letter of  Credit,  or any  commitment  or
other fee,  expense,  compensation  or any other amount payable to any member of
the Bank Group under the Loan  Documents  shall remain unpaid or  outstanding or
any Bank shall have any  Commitment  hereunder,  unless the Majority Banks shall
otherwise consent in writing:

                       Section 5.01. Reporting Requirements.  The Borrower shall
deliver or cause to be  delivered to the Agent (with  sufficient  copies for the
Agent to distribute the same to the other members of the Bank Group):

                       (a) As soon as available  and in any event within  forty-
five (45) days after the end of each of the first three  fiscal  quarters of the
Borrower:

                       (i) copies of the unaudited  consolidated  balance sheets
      of the Borrower  and its  Subsidiaries  as of the end of such period,  and
      unaudited  consolidated  statements of income,  retained earnings and cash
      flows of the Borrower and its  Subsidiaries for that fiscal period and for
      the  portion of the fiscal  year  ending  with such  period,  in each case
      setting forth in comparative  form (on a  consolidated  basis) the figures
      for  the  corresponding  period  of  the  preceding  fiscal  year,  all in
      reasonable detail; and

                       (ii)  a  certificate  of a  Responsible  Officer  of  the
      Borrower (1) stating that (A) such financial  statements fairly present in
      all material respects the consolidated  financial  position and results of
      operations  of the  Borrower  and  its  Subsidiaries  in  accordance  with
      generally accepted accounting principles consistently applied,  subject to
      year-end  adjustments and the absence of notes and (B) no Default or Event
      of  Default  has  occurred  and is  continuing  or, if any such  event has
      occurred and is continuing,  the action the Borrower is taking or proposes
      to  take  with  respect  thereto,   and  (2)  setting  forth  calculations
      demonstrating  compliance  by the Borrower with  Sections  6.04,  6.05 and
      6.06.

                       (b) As soon as available  and in any event within  ninety
(90) days after the end of each  fiscal year of the  Borrower  (i) copies of the
audited  consolidated  and  consolidating  balance sheet of the Borrower and its
Subsidiaries  as of the close of such fiscal year and audited  consolidated  and
consolidating statements of income and retained earnings and a statement of cash
flows of the Borrower and its  Subsidiaries  for such fiscal year,  in each case
setting forth in comparative form (on a consolidated  basis) the figures for the
preceding  fiscal year, all in reasonable  detail and  accompanied by an opinion
thereon (which shall not be qualified by reason of any limitation imposed by the

HOU04:43581.4







Borrower) of independent accountants of recognized national standing selected by
the Borrower and reasonably  satisfactory  to the Majority  Banks, to the effect
that such  consolidated  financial  statements  have been prepared in accordance
with generally accepted accounting  principles  consistently applied (except for
changes in which such  accountants  concur) and that such audit has been made in
accordance with generally  accepted auditing standards and (ii) a certificate of
a  Responsible   Officer  of  the  Borrower  (A)  setting   forth   calculations
demonstrating  compliance by the Borrower with Sections 6.04,  6.05 and 6.06 and
(B) stating that no Default or Event of Default has  occurred and is  continuing
or, if any such event has occurred and is continuing, the action the Borrower is
taking or proposes to take with respect thereto.

                       (c) Promptly after the sending or filing thereof,  copies
of all  reports and  shareholder  information  which the  Borrower or any of its
Subsidiaries  sends  to any  holders  of its  respective  securities,  in  their
capacities  as  holders  of such  securities  and  not in  their  capacities  as
directors,  officers  or  employees  of the  Borrower  or any of the  Borrower's
Subsidiaries, or to the SEC.

                       (d) As  soon  as  reasonably  possible  and in any  event
within ten (10) days after the Borrower or any of its Subsidiaries becomes aware
of the  occurrence  of a  Default  or  Event  of  Default,  a  certificate  of a
Responsible  Officer of the Borrower  setting  forth  details of such Default or
Event of  Default  and the  action  which has been  taken or is to be taken with
respect thereto.

                       (e) As  soon  as  reasonably  possible  and in any  event
within ten (10) days after the Borrower or any of its Subsidiaries becomes aware
thereof,  written  notice from a Responsible  Officer of the Borrower of (i) the
institution of or overt threat of, any action,  suit,  proceeding,  governmental
investigation  or  arbitration  by any  Governmental  Authority  or other Person
against or affecting the Borrower or any of its  Subsidiaries  that could have a
Material  Adverse  Effect on any such  Person  and that has not been  previously
disclosed in writing to the Bank Group pursuant to this Section 5.01 or (ii) any
material development in any action, suit, proceeding, governmental investigation
or arbitration already disclosed to the Bank Group pursuant to this Section 5.01
or Section 3.01.

                       (f) As  soon  as  reasonably  possible  and in any  event
within ten (10) days after the Borrower or any of its Subsidiaries becomes aware
thereof,  written  notice from a Responsible  Officer of the Borrower of (i) any
violation of, noncompliance with, or remedial obligations under, Requirements of
Environmental  Laws,  (ii) any  release  or  threatened  release  affecting  any
property  owned,  leased or operated by the Borrower or any of its  Subsidiaries
that  could  have  a  Material  Adverse  Effect  on the  Borrower  or any of its
Subsidiaries,  (iii) the amendment or  revocation of any permit,  authorization,
registration,  approval  or similar  right  that  could have a Material  Adverse
Effect  on  the  Borrower  or  any  of  its  Subsidiaries  or  (iv)  changes  to
Requirements of Environmental  Laws that could have a Material Adverse Effect on
the Borrower or any of its Subsidiaries.

HOU04:43581.4






                       (g)  Promptly,  and in any event  within  five days after
becoming  aware of any of the  following,  a written  notice  setting  forth the
nature thereof and the action,  if any, that the Borrower or an ERISA  Affiliate
or  Subsidiary  proposes to take with respect  thereto:  (i) with respect to any
Pension Plan, any Reportable Event, for which notice thereof has not been waived
pursuant to such regulations as in effect on the date hereof; or (ii) the taking
by the  PBGC of  steps  to  institute,  or the  threatening  by the  PBGC of the
institution of,  proceedings under section 4042 of ERISA for the termination of,
or the appointment of a trustee to administer,  any Pension Plan, or the receipt
by the  Borrower  or any  ERISA  Affiliate  or  Subsidiary  of a  notice  from a
Multiemployer  Plan that such action has been taken by the PBGC with  respect to
such Multiemployer Plan; or (iii) any event, transaction or condition that could
result in the incurrence of any liability by the Borrower or any ERISA Affiliate
or  Subsidiary  pursuant  to Title I or IV of ERISA or the penalty or excise tax
provisions of the Internal  Revenue Code relating to employee  benefit plans, or
in the imposition of any Lien on any of the rights,  properties or assets of the
Borrower or any ERISA Affiliate or Subsidiary pursuant to Title I or IV of ERISA
or such penalty or excise tax  provisions;  or (iv) the  inability or failure of
the Borrower or any ERISA  Affiliate or Subsidiary to make timely any payment or
contribution to or with respect to any Pension Plan, Multiemployer Plan or Other
Benefit Plan, if such failure, either separately or together with all other such
failures  could  reasonably  be expected to be  Material;  or (v) any event with
respect to any Pension  Plan,  Multiemployer  Plan and/or  Other  Benefit  Plan,
individually  or in the  aggregate,  that could  reasonably  be expected to be a
Material liability.

                       (h) As soon as available and in any event  simultaneously
with the  delivery of the  financial  statements  delivered  pursuant to Section
5.01(b),  copies of the budget of the Borrower and its Subsidiaries containing a
consolidated and consolidating balance sheet, and detailed statements of income,
cash flow and projected capital expenditures for the then current fiscal year.

                       (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  in form,  scope and
substance reasonably satisfactory to the Agent.

                       (j) Such  other  information  as any  member  of the Bank
Group  may  from  time to  time  reasonably  request  respecting  the  business,
properties,  operations or condition, financial or otherwise, of the Borrower or
any of its Subsidiaries.

                       Section 5.02.  Taxes;  Claims.  The Borrower will pay and
discharge,  and will cause each of its  Subsidiaries  to pay and discharge,  all
taxes,  assessments and governmental  charges or levies imposed upon such Person
or upon its income or profits, or upon any properties  belonging to such Person,
prior to the date on which  penalties  attach  thereto,  and all  lawful  claims
which, if unpaid,  might become a Lien upon any properties of such Person, other
than any such tax, assessment, charge, levy or claim which is being contested in
good  faith  by  appropriate   proceedings  promptly  initiated  and  diligently

HOU04:43581.4







conducted,  and with  respect to which  adequate  reserves  are set aside on the
books  of  such  Person  in  accordance  with  generally   accepted   accounting
principles.

                       Section  5.03.  Compliance  with Laws.  The Borrower will
comply,  and will cause each of its Subsidiaries to comply,  with all applicable
Requirements of Law imposed by, any Governmental Authority,  non-compliance with
which  might  have a  Material  Adverse  Effect  on  any  such  Person.  Without
limitation of the  foregoing,  the Borrower  shall,  and shall cause each of its
Subsidiaries  to, comply with all Requirements of  Environmental  Laws,  operate
properties  and  conduct  its  business in  accordance  with good  environmental
practices,  and handle, treat, store and dispose of hazardous materials or solid
waste in accordance with such practices,  except where the failure to do so will
not have a Material Adverse Effect on any such Person.

                       Section 5.04. Insurance.  The Borrower will maintain, and
will cause each of its  Subsidiaries  to maintain,  with  financially  sound and
reputable  insurance  companies or  associations,  or  self-insure  against such
risks,  and in such  amounts (and with  co-insurance  and  deductibles),  as are
usually insured  against by Persons of similar size and  established  reputation
engaged in the same or similar  businesses  and  similarly  situated,  including
insurance against fire, casualty,  business  interruption,  injury to Persons or
property and other normal hazards normally  insured against,  but, in any event,
such insurance shall not be substantially  dissimilar from that described in the
insurance  schedule delivered on the Effective Date pursuant to Section 3.01. In
addition,  on or before January 31 of each year commencing January 31, 1997, the
Borrower  will deliver to the Agent a report  prepared by  Borrower's  insurance
broker  listing all insurance  policies and programs then in effect with respect
to the properties  and businesses of the Borrower and each of its  Subsidiaries,
specifying  for each such policy and program,  (a) the amount  thereof,  (b) the
risks  insured  against  thereby,  (c) the name of the insurer and each  insured
party  thereunder  and (d) the policy or other  identification  number  thereof.
Other than with respect to worker's compensation policies, each policy listed on
the  schedule  delivered  pursuant to Section  3.01 and each  additional  policy
maintained in compliance with this Agreement shall be endorsed showing the Agent
as an  additional  insured,  or a loss payee,  as  applicable.  All  policies of
insurance required by the terms of this Agreement or any Security Document shall
provide that at least 30 days' prior written notice be given to the Agent of any
termination, cancellation, reduction or other modification of such insurance.

                       Section  5.05.  Corporate  Existence.  The Borrower  will
preserve and maintain,  and will cause each of its  Subsidiaries to preserve and
maintain, its existence,  rights,  franchises and privileges in the jurisdiction
of its  incorporation,  and qualify and remain qualified,  and cause each of its
Subsidiaries to qualify and remain qualified,  as a foreign  corporation in each
jurisdiction  in which  such  qualification  is  material  to the  business  and
operations of such Person or the ownership or leasing of the  properties of such
Person  except  to the  extent  that a  Subsidiary  merges  or  consolidates  in
compliance  with Section  6.08 or ceases to be a Subsidiary  of Borrower if such

HOU04:43581.4







cessation is permitted under this Agreement.

                       Section  5.06.  Inspections.  From  time to  time  during
regular business hours upon reasonable  prior notice,  the Borrower will permit,
and will cause each of its Subsidiaries to permit, any agents or representatives
of any member of the Bank Group to examine and make copies of and abstracts from
the records and books of account of, and visit the  properties  of the  Borrower
and its  Subsidiaries  and to discuss the affairs,  finances and accounts of any
such  Person  with  any of  its  independent  public  accountants,  officers  or
directors, all at the expense of the Borrower.

                       Section 5.07.  Maintenance  of  Properties.  The Borrower
will  maintain and preserve,  and will cause each  Subsidiary of the Borrower to
maintain and preserve, all of its personal property and fixtures (or replacement
therefor) necessary for the proper conduct of its business in good working order
and  condition as would a reasonably  prudent  operator,  ordinary wear and tear
excepted.  The  Borrower  shall  cause,  or in the event the Borrower is not the
operator of its Oil and Gas Properties,  use reasonable best efforts  consistent
with its rights under applicable  operating agreements to cause, its Oil and Gas
Properties to be maintained,  developed, protected against drainage and operated
in a good and workmanlike  manner as would a reasonably  prudent operator and in
material compliance with all operating  agreements,  other applicable agreements
and all applicable Requirements of Law.

                       Section 5.08. Accounting Systems. The Borrower will keep,
and will cause each of its  Subsidiaries to keep,  adequate records and books of
account in which  complete  entries will be made in  accordance  with  generally
accepted  accounting  principles  consistently  applied  (subject  to  year  end
adjustments), reflecting all financial transactions of such Person. The Borrower
shall maintain or cause to be maintained a system of accounting  established and
administered in accordance with sound business  practices to permit  preparation
of  financial  statements  in  conformity  with  generally  accepted  accounting
principles,  and each of the  financial  statements  described  herein  shall be
prepared from such system and records.

                       Section  5.09.  Use of Loans and  Letters of Credit.  All
Letters of Credit shall be issued for general corporate purposes consistent with
the terms of this Agreement and all  Requirements  of Law. The Borrower will use
the proceeds of all Loans hereunder for general  corporate  purposes  (including
working  capital  purposes)  consistent with the terms of this Agreement and all
Requirements of Law.

                       Section 5.10.  Reserve  Reports.  (a) By March 15 of each
year commencing  March 15, 1997, the Borrower shall furnish to the Agent and the
Banks a Reserve Report dated as of the immediately  preceding  December 31. Each
Reserve Report shall be prepared by certified  independent  petroleum  engineers
acceptable to the Agent. Each such Reserve Report shall be in form and substance

HOU04:43581.4







satisfactory to the Agent and shall set forth,  as of the immediately  preceding
December 31: (i) the Proved Reserves  attributable to the Borrower's Oil and Gas
Properties  together with a projection of the rate of production  and future net
income, taxes,  operating expenses and capital expenditures with respect thereto
as of such dates, based upon pricing and escalation  assumptions consistent with
SEC reporting  requirements  at the time and (ii) such other  information as the
Agent may reasonably  request.  By August 15 of each year commencing  August 15,
1997,  the Borrower  shall  furnish to the Agent and the Banks a Reserve  Report
dated as of the immediately preceding June 30. Each such Reserve Report shall be
prepared by or under the  supervision  of the chief engineer of the Borrower who
shall certify,  to the best of his knowledge and in all material respects,  such
Reserve  Report to be true and accurate and to have been  prepared in accordance
with the procedures used in the immediately  preceding  Reserve Report delivered
to the Banks under this Section 5.10(a).

                       (b) With respect to any  unscheduled  redetermination  of
the  Borrowing  Base  requested  by the Borrower in  connection  with a proposed
acquisition  of Oil and Gas  Properties  with a fair  market  value in excess of
$10,000,000,  the  Borrower  shall  furnish to the Bank  Group a Reserve  Report
prepared by certified  independent  petroleum engineers  acceptable to the Agent
covering the Oil and Gas Properties to be acquired. Such Reserve Report shall be
prepared in  accordance  with the  procedures  set forth in Section  5.10(a) and
contain such other information as the Agent may reasonably request. In the event
of any other  unscheduled  redetermination  of the Borrowing  Base, the Borrower
shall furnish to the Agent and the Banks a Reserve  Report  prepared by or under
the supervision of the chief engineer of the Borrower who shall certify,  to the
best of his knowledge and in all material  respects,  such Reserve  Report to be
true and accurate and to have been  prepared in accordance  with the  procedures
used in the immediately  preceding  Reserve Report  delivered to the Banks under
Section 5.10(a) with an "as of date" as requested by the Majority Banks. For any
unscheduled  redetermination  of the  Borrowing  Base  initiated by the Majority
Banks or the Agent,  the Borrower  shall provide such Reserve  Report as soon as
possible,  but in any  event  no later  than 30 days  following  the  Borrower's
receipt of notice of such unscheduled redetermination from the Agent.

                       (c)  With  the  delivery  of  each  Reserve  Report,  the
Borrower  shall provide to the Bank Group,  a certificate  from the  Responsible
Officer that, to the best of his knowledge and in all material respects, (i) the
information  contained in the Reserve Report and any other information delivered
therewith is true and correct,  (ii) the Borrower owns good and defensible title
to its Oil and Gas Properties evaluated in such Reserve Report free of all Liens
except for  Excepted  Liens and that the  Borrower  has created or allowed to be
created no new Liens on its Oil and Gas  Properties  except for Excepted  Liens,
(iii) except as set forth on an exhibit to the certificate, on a net basis there
are no gas imbalances,  take or pay or other prepayments with respect to its Oil
and Gas  Properties  evaluated  in such Reserve  Report which would  require the
Borrower to delivery  Hydrocarbons  produced from such Oil and Gas Properties at
some future time  without then or  thereafter  receiving  full payment  therefor

HOU04:43581.4







exceeding a market value of $100,000 in the aggregate,  (iv) none of its Oil and
Gas Properties have been sold (other than Hydrocarbons  produced and sold in the
ordinary  course  of  business)  since  the  date  of the  last  Borrowing  Base
determination  except  as set  forth on an  exhibit  to the  certificate,  which
certificate  shall  list  all of its Oil and Gas  Properties  sold  (other  than
Hydrocarbons  produced and sold in the ordinary  course of business) and in such
detail as reasonably required by the Agent, (v) attached to the certificate is a
list of its Oil and Gas  Properties  added to and deleted  from the  immediately
prior Reserve  Report and an updated list of all Persons (with their  addresses)
disbursing proceeds to the Borrower from its Oil and Gas Properties, (vi) except
as set forth on a schedule  attached to the certificate,  all of the Oil and Gas
Properties  evaluated by such Reserve Report are Mortgaged  Property,  and (vii)
any  change in  working  interest  or net  revenue  interest  in its Oil and Gas
Properties  occurring  since the last  Reserve  Report  and the  reason for such
change.

                       (d) As soon as available  and in any event within 30 days
after the end of each month  commencing  with  November 30,  1996,  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) in such period,  and such
other information with respect thereto as the Agent may reasonably request.

                       (e) By March 15 of each year  commencing  March 15, 1997,
the Borrower  shall furnish to the Agent and the Banks a reserve report dated as
of the  immediately  preceding  December 31. Each such  reserve  report shall be
prepared by certified  independent  petroleum engineers acceptable to the Agent.
Each such reserve  report  shall be in form and  substance  satisfactory  to the
Agent and shall set forth, as of the immediately  preceding December 31: (i) the
Proved Reserves  attributable to the Guarantor's Oil and Gas Properties together
with a  projection  of the rate of  production  and  future net  income,  taxes,
operating  expenses and capital  expenditures  with  respect  thereto as of such
dates,  based  upon  pricing  and  escalation  assumptions  consistent  with SEC
reporting  requirements at the time and (ii) such other information as the Agent
may reasonably request.

                       Section 5.11. Title.  Promptly and in any event within 30
days after written request  therefor by the Agent, the Borrower will provide the
Agent with title opinions  reasonably  satisfactory to the Agent with respect to
the  Borrower's  Oil and Gas  Properties  which are  included in the most recent
Reserve Report delivered to the Bank Group and for which title opinions have not
been previously  delivered so that the Agent will have acceptable title opinions
on at least  eighty  percent  (80%) of the value of the  Borrower's  Oil and Gas
Properties included in such Reserve Report.

                       Section 5.12. Additional Collateral.  Should the Borrower
own additional  Oil and Gas Properties  that are not subject to a first priority
Lien  under  the  Security  Documents  or  acquire  any  additional  Oil and Gas

HOU04:43581.4







Properties, the Borrower will grant to the Agent as security for the Obligations
a first  priority  Lien  (subject  only to  Excepted  Liens)  on the  Borrower's
interest in such Oil and Gas Properties which Lien will be created and perfected
by and in accordance with the provisions of mortgages,  deeds of trust, security
agreements and financing  statements,  or other Security Documents,  all in form
and substance satisfactory to the Agent in its sole discretion and in sufficient
executed (and  acknowledged  where  necessary or appropriate)  counterparts  for
recording  purposes.  Upon  written  request by the  Agent,  the  Borrower  will
immediately  execute and  deliver to the Agent  Security  Documents  in form and
substance  satisfactory  to the Agent  granting to the Agent as security for the
Obligations a first  priority  Lien (subject only to Excepted  Liens) on (a) all
notes  or  other  instruments  or  documents  evidencing  Indebtedness  of  each
Subsidiary of the Borrower owing to the Borrower that is permitted under Section
6.01(f) and (b) all Liens in favor of the Borrower securing such Indebtedness.

                       Section 5.13. Further Assurances in General. The Borrower
shall,  and shall  cause each of its  Subsidiaries  to,  protect and perfect the
Liens contemplated by the Security Documents. The Borrower at its expense shall,
and shall cause each of its  Subsidiaries  to, promptly  execute and deliver all
such other and further documents,  agreements and instruments in compliance with
or  accomplishment of the covenants and agreements of the Borrower or any of its
Subsidiaries  in  the  Loan  Documents,   including,   without  limitation,  the
accomplishment of any condition precedent that may have been waived by the Banks
prior to the initial Borrowing or Letter of Credit or any subsequent  Borrowings
or Letters of Credit.

                       Section 5.14. Enforcement of Acquisition  Documents.  The
Borrower  will  enforce in all material  respects  all of the terms,  covenants,
warranties and  representations  in favor of the Borrower under the  Acquisition
Documents.

                               ARTICLE VI
                           NEGATIVE COVENANTS

                       So long as any Letter of Credit remains outstanding,  any
principal  amount of any  reimbursement  obligation  in respect of any Letter of
Credit,  any principal  amount of any Loan, any amount of interest accrued under
the Notes or in respect of any Letter of Credit, or any commitment,  facility or
other fee,  expense,  compensation  or any other amount payable to any member of
the Bank Group under the Loan  Documents  shall remain unpaid or  outstanding or
any Bank shall have any  Commitment  hereunder,  unless the Majority Banks shall
otherwise consent in writing:

                       Section 6.01. Indebtedness Restriction. The Borrower will
not, and will not permit any of its  Subsidiaries to, create,  incur,  assume or
suffer to exist, any Indebtedness other than:

HOU04:43581.4






                       (a)  Indebtedness of the Borrower and the Guarantor under
the Loan Documents;

                       (b)  Indebtedness of the Borrower or its  Subsidiaries in
respect of any Derivatives permitted by Section 6.03;

                       (c) purchase money  Indebtedness for equipment or similar
items  purchased or leased in the  ordinary  course of business not to exceed in
the aggregate $2,000,000 outstanding at any time;

                       (d) the Bond Indebtedness;

                       (e) Indebtedness set out on Schedule 6.01;

                       (f)  Indebtedness  of Subsidiaries of the Borrower to the
Borrower  or to a  Wholly  Owned  Subsidiary  not to  exceed  $5,000,000  in the
aggregate  so long as such  Indebtedness  (i) is held only by the  Borrower or a
Wholly Owned  Subsidiary,  and (ii) is secured by Liens in favor of the Borrower
or a  Wholly  Owned  Subsidiary,  as  appropriate,  covering  Property  of  such
Subsidiary  with a fair market value equal to or in excess of the amount of such
Indebtedness.

                       (g)  Indebtedness  of  the  Borrower  to a  Wholly  Owned
Subsidiary  so long as such  Indebtedness  (i) is held  only by a  Wholly  Owned
Subsidiary and (ii) is unsecured and subordinated to the Obligations pursuant to
a written subordination agreement satisfactory to the Agent;

                       (h) Indebtedness under the CGGS Debentures, provided that
such  Indebtedness is repaid not later than five (5) days after the date of this
Agreement; and

                       (i)  Indebtedness of Borrower and its Subsidiaries in the
aggregate amount not to exceed $1,000,000 in addition to all other  Indebtedness
permitted by this Section 6.01.

                       Section 6.02.  Lien  Restriction.  The Borrower will not,
and will not permit any of its Subsidiaries to, create,  incur, assume or suffer
to be  created,  assumed  or  incurred  or to  exist,  any Lien upon any of such
Person's property or assets,  whether now owned or hereafter acquired other than
the following Liens ("Excepted Liens"):

                       (a) Liens created pursuant to this Agreement or any other
Loan Document;

                       (b)   royalties,   overriding   royalties,   reversionary
interests,   production  payments  and  similar  burdens  with  respect  to  the
Borrower's or its Subsidiaries Oil and Gas Properties to the extent such burdens
do not reduce the  Borrower's  net  interests in  production  in its Oil and Gas
Properties below the interests reflected in each Reserve Report or the interests

HOU04:43581.4







warranted under this Agreement, the Existing Mortgage or the New Mortgage and do
not operate to deprive the Borrower or its  Subsidiaries  of any material rights
in respect of its assets or properties  (except for rights  customarily  granted
with respect to such interests);

                       (c) statutory  liens,  including liens for taxes or other
assessments  that are not yet  delinquent  (or that,  if  delinquent,  are being
contested in good faith by appropriate proceedings and for which the Borrower or
its Subsidiaries  have set aside on their books adequate  reserves in accordance
with generally accepted accounting principles consistently applied);

                       (d)  easements,  rights  of  way,  servitudes,   permits,
surface  leases and other  rights in respect to surface  operations,  pipelines,
grazing, logging, canals, ditches, reservoirs or the like, conditions, covenants
and 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 the Borrower's or its Subsidiaries' assets or properties;

                       (e) materialmen's, mechanic's, repairman's, contractor's,
sub-contractor's,  operator's  and other Liens  incidental to the  construction,
maintenance,  development  or operation of the  Borrower's or its  Subsidiaries'
assets or properties to the extent not delinquent (or which, if delinquent,  are
being  contested  in good  faith by  appropriate  proceedings  and for which the
Borrower or its Subsidiaries  have set aside on their books adequate reserves in
accordance with generally accepted accounting principles consistently applied);

                       (f) all contracts,  agreements and  instruments,  and all
defects and  irregularities  and other matters  affecting the  Borrower's or its
Subsidiaries'  assets and  properties  which were in  existence at the time such
assets and properties  were  originally  acquired by such Person and all routine
operational  agreements  entered into in the ordinary course of business,  which
contracts,  agreements,  instruments,  defects, irregularities and other matters
and routine operational  agreements do not reduce the Borrower's net interest in
production in its Oil and Gas Properties  below the interests  reflected in each
Reserve Report or the interests  warranted  under this  Agreement,  the Existing
Mortgage or the New Mortgage and do not interfere materially with the operation,
value or use of the Borrower's or its Subsidiaries' assets and properties;

                       (g)    landlord's liens securing obligations that are not
yet  delinquent (or that, if  delinquent,  are being  contested in good faith by
appropriate  proceedings and for which the Borrower or its Subsidiaries have set
aside on their books adequate  reserves in accordance  with  generally  accepted
accounting principles consistently applied);

                       (h)  Liens in  connection  with  workmen's  compensation,
unemployment  insurance  or other  social  security,  old age  pension or public

HOU04:43581.4







liability  obligations that are not yet delinquent (or that, if delinquent,  are
being  contested  in good  faith by  appropriate  proceedings  and for which the
Borrower or its Subsidiaries  have set aside on their books adequate reserves in
accordance with generally accepted accounting principles consistently applied);

                       (i) Liens securing purchase money Indebtedness  permitted
under  Section  6.01(c) but only to the extent such Liens cover the equipment or
other similar items purchased or leased;

                       (j) Liens in favor of the trustee  under  Section 7.07 of
the Bond Indenture;

                       (k) Lien in favor of Compass  Bank-San  Antonio  covering
certain  real  property in Comal  County,  Texas  described in that certain Real
Estate Lien Note,  dated  December  28,  1995,  issued by the  Borrower,  in the
principal  amount of  $238,500,  to the extent the Lien secures such Real Estate
Lien Note;

                       (l) Liens on any assets of any Subsidiary in favor of the
Borrower or the Guarantor;

                       (m) Liens in favor of the Frost  National Bank  ("Frost")
on  various  certificates  of  deposits  issued by Frost to the  Borrower  in an
original  principal  amount of $60,000,  which Liens secure  Indebtedness of the
Borrower  to Frost  pursuant  to the  letters of credit  issued by Frost for the
benefit of the Borrower that are described on Schedule 6.01;

                       (n) Any Lien reserved in a lease or farmout  agreement to
secure the payment of rents or royalties or other obligations under such farmout
agreement  or lease,  but only to the extent  that any such Lien  referred to in
this clause secures obligations not yet delinquent (or that, if delinquent,  are
being  contested  in good  faith by  appropriate  proceedings  and for which the
Borrower or its Subsidiaries  have set aside on their books adequate reserves in
accordance with generally accepted accounting  principles  consistently applied)
and encumbers the Property  covered by such lease or farmout  agreement and does
not materially  impair (i) the use of the Property  covered by such Lien for the
purposes for which such Property is held by the Borrower or any  Subsidiary,  or
(ii) the value of the Property subject thereto; and

                       (o) Liens in favor of  collecting or payor banks having a
right of  setoff,  revocation,  refund or  chargeback  with  respect to money or
instruments  of the Borrower or any  Subsidiary on deposit with or in possession
of such bank.

                       Section 6.03.  Derivatives.  The Borrower  shall not, and
shall not permit any of its  Subsidiaries  to, enter into any Derivatives  other
than (a) commodity price  Derivatives  presently  existing with  Christiania (b)
commodity price Derivatives  related to bona fide hedging  activities so long as
(i) the aggregate  notional amounts of such  Derivatives  during any calculation

HOU04:43581.4







period  do  not  exceed  fifty  percent  (50%)  of  the   Borrower's   and  such
Subsidiaries'   projected  actual  production  of  Hydrocarbons  (based  on  the
projected  production of Proved Producing  Reserves reflected in the most recent
Reserve Report or reserve report delivered under Section 5.10(e), as applicable,
delivered  pursuant  hereto)  for such  period,  and (ii) such  commodity  price
Derivative  has been  entered  into with the Agent,  the  Co-Agent or such other
Person  agreed  to by the  Majority  Banks  and (c)  interest  rate and  foreign
exchange  Derivatives  entered  into with the Agent,  the  Co-Agent or otherwise
approved by the Majority Banks.

                       Section 6.04.  Interest Coverage Ratio. The Borrower will
not permit the ratio of (a) EBITDA to (b) Interest  Expense,  measured as of the
last day of any calendar  quarter for the twelve month period then ended,  to be
less than 1.50 to 1.00 as of the last day of any calendar  quarter  through June
30,  1997 or to be less  than  1.75 to 1.00 as of the last  day of any  calendar
quarter after June 30, 1997.

                       Section 6.05. Current Ratio. The Borrower will not permit
the ratio of (i) its consolidated  current assets,  including  amounts available
under  the  Commitments  based on the  Credit  Outstanding  and the most  recent
determination  of  the  Borrowing  Base,  to  (ii)  its   consolidated   current
liabilities, excluding the aggregate amount of Credit Outstanding, at the end of
any fiscal quarter to be less than 1.00 to 1.00.

                       Section 6.06.  Tangible Net Worth.  The Borrower will not
permit its  Consolidated  Tangible Net Worth to be less than  $30,000,000 at any
time.

                       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,
and (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.  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,  to the
extent  (and only to the extent)  the sale of such  assets was  permitted  under
subclause (d) of the preceding sentence.

                       Section  6.08.  Consolidation  and Mergers.  The Borrower
will  not,  and  will  not  permit  any  of its  Subsidiaries  to,  directly  or
indirectly,  consolidate  with or merge  into any Person or permit any Person to
consolidate  with or merge into it,  except that any  Subsidiary of the Borrower
may merge into or consolidate  with any other Subsidiary of the Borrower and any
Subsidiary  of the Borrower  may merge into or  consolidate  with the  Borrower,
provided in each case that, immediately after giving effect and pro forma effect

HOU04:43581.4







thereto,  no event  shall occur and be  continuing  which  constitutes  either a
Default or an Event of Default,  and if the  Borrower is a party to such merger,
the Borrower is the surviving entity.

                       Section 6.09. Restricted Disbursements. The Borrower will
not,  and will not permit any of its  Subsidiaries  to approve,  make,  incur or
commit to incur any Restricted Disbursements other than:

                       (a) advances or extensions  of credit on terms  customary
in the  industry  involved  in the form of  accounts  receivable  incurred,  and
investments, loans, and advances made in settlement of such accounts receivable,
all in the ordinary course of business;

                       (b) Permitted Investments;

                       (c) Capital  Expenditures  by the Borrower to develop its
Proved  Reserves,  Capital  Expenditures by any Subsidiary to develop its Proved
Reserves,   and  additional  Capital   Expenditures  by  the  Borrower  and  its
Subsidiaries in an amount not to exceed  $5,000,000 in the aggregate  during any
six-month period commencing on any October 1 or April 1, as the case may be;

                       (d) preferred  stock dividends not to exceed $365,928 per
annum so long as no Event of Default has occurred and is  continuing or would be
caused by payment of such preferred stock dividend;

                       (e) dividends  paid by any  Subsidiary of the Borrower to
the Borrower or any of its  Subsidiaries  and any minority  shareholders of such
Subsidiary,  so  long  as  such  dividend  is  paid  at a  uniform  rate  to all
shareholders of such Subsidiary and no Event of Default would exist after giving
effect to such payment;

                       (f) the repayment of the CGGS Debentures Indebtedness;

                       (g) payments by the Borrower or any Subsidiary on account
of Indebtedness permitted under Section 6.01;

                       (h)  investments or capital  contributions  not to exceed
$2,000,000  in the  aggregate  made by the  Borrower  in or to any Wholly  Owned
Subsidiary; and

                       (i)  investments  or  capital  contributions  made by any
Subsidiary of the Borrower in or to the Borrower or any Wholly Owned Subsidiary.

                       Section 6.10.  Lines of Business.  The Borrower will not,
and will not permit any of its Subsidiaries to, directly or indirectly engage in
any business other than the  acquisition,  disposition,  exploration,  ownership
development  and  operation  of  Oil  and  Gas  Properties  and  the  gathering,

HOU04:43581.4







marketing, treating, processing, storage and transporting of production from Oil
and Gas Properties.

                       Section 6.11.  Transactions with Affiliates.  Neither the
Borrower nor any of its  Subsidiaries,  will enter into any transaction  with an
Affiliate  other than (a)  transactions  entered into in the ordinary  course of
business  and upon terms no less  favorable  than those that the Borrower or its
Subsidiary,  as applicable,  could obtain in an arms length  transaction  with a
Person that is not an Affiliate  and (b)  transactions  between the Borrower and
any of its Subsidiaries, or between such Subsidiaries, that do not and will not,
either directly or indirectly, cause an Event of Default.


                              ARTICLE VII
                          DEFAULT AND REMEDIES

                       Section 7.01. Events of Default.  If any of the following
events ("Events of Default") shall occur and be continuing:

                       (a)  the  Borrower   shall  fail  to  pay  when  due  any
installment of principal of the Notes or any reimbursement obligation in respect
of any Letter of Credit; or

                       (b) the  Borrower  shall fail to pay any  interest on any
Loan or any arrangement fee,  commitment fee,  administration  fee, funding fee,
L/C Fee, commission,  expense, compensation,  reimbursement or other amount when
due; or

                       (c) the Borrower shall fail to perform any term, covenant
or agreement contained in Article VI, or Section 5.01(e) of this Agreement; or

                       (d) the Borrower shall fail to perform any term, covenant
or  agreement  contained  in this  Agreement  (other  than those  referenced  in
subsections  (a), (b) and (c) of this Section  7.01) and such failure  shall not
have been remedied  within thirty (30) days after notice  thereof from the Agent
to the Borrower; or

                       (e) the Borrower or the  Guarantor  shall fail to perform
any term, covenant or agreement contained in any Loan Document (other than those
referenced in  subsections  (a), (b), (c) and (d) of this Section 7.01) and such
failure  shall not have been  remedied  within  thirty  (30) days  after  notice
thereof from the Agent to the Borrower; or

                       (f) any  representation or warranty made by the Borrower,
or any of its officers,  in any Loan Document or in any certificate,  agreement,
instrument  or  statement  contemplated  by  or  delivered  pursuant  to,  or in

HOU04:43581.4







connection  with,  any Loan Document  shall prove to have been  incorrect in any
material respect when made; or

                       (g) the  Borrower  or any of its  Subsidiaries  shall (i)
fail to pay Indebtedness  having a principal amount in excess of $500,000 in the
aggregate (other than the amounts referred to in subsections (a) and (b) of this
Section 7.01) owing by such Person, or any interest or premium thereon, when due
(or, if permitted by the terms of the relevant  document,  within any applicable
grace period), whether such Indebtedness shall become due by scheduled maturity,
by required prepayment, by acceleration, by demand or otherwise; or (ii) fail to
perform any term,  covenant or condition  on its part to be performed  under any
agreement  or   instrument   evidencing,   securing  or  relating  to  any  such
Indebtedness,  when  required to be performed,  and such failure shall  continue
after the  applicable  grace  period,  if any,  specified  in such  agreement or
instrument,  if the effect of such  failure is to  accelerate,  or to permit the
holder or holders of such  Indebtedness  to  accelerate,  the  maturity  of such
Indebtedness; or

                       (h) any Loan Document  shall (other than with the consent
of the Majority Banks), at any time after its execution and delivery and for any
reason,  cease  to  be  in  full  force  and  effect  or to  provide  the  Liens
contemplated  thereby, or shall be declared to be null and void, or the validity
or  enforceability  thereof  or of  the  Liens  contemplated  thereby  shall  be
contested  by any Person  party to the Loan  Documents  or any such Person shall
deny that it has any or further liability or obligation under any Loan Document;
or

                       (i) the  Borrower  or any of its  Subsidiaries  shall  be
adjudicated  insolvent,  or shall  generally  not pay,  or admit in writing  its
inability to pay, its debts as they mature, or make a general assignment for the
benefit of creditors,  or any proceeding  shall be instituted by any such Person
seeking  to   adjudicate   it  insolvent,   seeking   liquidation,   winding-up,
reorganization, arrangement, adjustment, protection, relief or composition of it
or its debts under any law relating to bankruptcy,  insolvency or reorganization
or relief  of  debtors,  or  seeking  the  entry of an order  for  relief or the
appointment of a receiver,  trustee, or other similar official for it or for any
substantial  part of its  property,  or the Borrower or any of its  Subsidiaries
shall take any action in  furtherance  of any of the  actions set forth above in
this Section 7.01(i); or

                       (j) any  proceeding  of the type  referred  to in Section
7.01(i) is filed,  or any such  proceeding is commenced  against the Borrower or
any of its  Subsidiaries  or any such Person by any act  indicates  its approval
thereof,  consent  thereto or  acquiescence  therein,  or an order for relief is
entered in an involuntary case under the bankruptcy law of the United States, or
an  order,  judgment  or decree  is  entered  appointing  a  trustee,  receiver,
custodian,  liquidator  or similar  official  or  adjudicating  any such  Person
insolvent,  or approving the petition in any such  proceedings,  and such order,
judgment or decree remains in effect for sixty (60) days; or


HOU04:43581.4






                       (k) a final judgment or order for the payment of money in
excess of $500,000 (net of acknowledged,  uncontested  insurance coverage) shall
be rendered against the Borrower or any of its  Subsidiaries  which has not been
discharged,  vacated or reversed and either (i)  enforcement  proceedings  shall
have been  commenced by any creditor  upon such judgment or order or (ii) a stay
of  enforcement  of such  judgment  or order by reason  of a  pending  appeal or
otherwise,  shall not be in effect  for any  period of thirty  (30)  consecutive
days;  or (l) if (i) any Pension Plan shall fail to satisfy the minimum  funding
standards  of  ERISA or the  Internal  Revenue  Code  for any plan  year or part
thereof or a waiver of such standards or extension of any amortization period is
sought or granted under section 412 of the Internal  Revenue Code, (ii) a notice
of intent  to  terminate  any  Pension  Plan  shall  have been or is  reasonably
expected to be filed with the PBGC or the PBGC shall have instituted proceedings
under Section 4042 of ERISA to terminate or appoint a trustee to administer  any
Pension Plan or the PBGC shall have notified the Borrower or any ERISA Affiliate
or Subsidiary that a Pension Plan may become a subject to any such  proceedings,
(iii) the aggregate "amount of unfunded benefit liabilities" (within the meaning
of  Section  4001(a)(18)  of  ERISA)  under all  Pension  Plans,  determined  in
accordance with Title IV of ERISA,  shall exceed $100,000,  (iv) the Borrower or
any ERISA Affiliate or Subsidiary shall have incurred or is reasonably  expected
to incur any liability pursuant to Title I or IV of ERISA, the penalty or excise
tax provisions of the Internal  Revenue Code relating to employee  benefit plans
and/or other liability with respect to one or more Other Benefit Plans,  (v) the
Borrower or any ERISA Affiliate or Subsidiary  withdraws from any  Multiemployer
Plan, (vi) the Borrower or any ERISA  Affiliate or Subsidiary  fails to make any
contribution  due, or payment to, any Pension  Plan,  Multiemployer  Plan and/or
Other Benefit  Plan, or (vii) the Borrower or any ERISA  Affiliate or Subsidiary
establishes  or  amends  any  employee   welfare   benefit  plan  that  provides
post-employment  welfare  benefits in a manner that would increase the liability
of the Borrower or any ERISA  Affiliate or Subsidiary  thereunder,  and any such
event  or  events   described  in  clauses  (i)  through  (vii)  above,   either
individually or together with any other such event or events,  could  reasonably
be expected to have a Material Adverse Effect; or

                       (m) any event which has a Material  Adverse  Effect shall
occur; or

                       (n) a Change of Control shall occur; or

                       (o) an  event  of  default  shall  occur  under  the Bond
Indenture;

then,  (i) upon the  occurrence  of any Event of  Default  described  in Section
7.01(i) or Section 7.01(j),  (A) the Commitments shall  automatically  terminate
and (B) the entire unpaid  principal  amount of all Loans,  all interest accrued
and unpaid  thereon,  and all other amounts  payable by the Borrower  under this
Agreement,  the  Notes,  the other Loan  Documents  and any other  agreement  or
security document contemplated by or delivered in connection with this Agreement

HOU04:43581.4






shall automatically become immediately due and payable,  without presentment for
payment, demand, protest, notice of intent to accelerate, notice of acceleration
or further notice of any kind, all of which are hereby  expressly  waived by the
Borrower,  and the Agent may direct the beneficiary of any outstanding Letter of
Credit to make a drawing  under such Letter of Credit in an amount  equal to the
full  amount  available  thereunder  and  require  from the  Borrower  immediate
reimbursement  for  payments  made  pursuant to such  drawing,  or the Agent may
direct the Borrower to deposit with the Issuing Bank cash equal to the aggregate
amount of all  Outstanding  Letters  of Credit as  security  for the  Borrower's
obligations  in respect of such Letters of Credit,  and (ii) upon the occurrence
of any Event of Default,  the Agent may, and upon the  direction of the Majority
Banks  shall,  by notice to the  Borrower  (A)  declare  the  Commitments  to be
terminated,  whereupon  the same shall  forthwith  terminate and (B) declare the
entire unpaid  principal  amount of all Loans,  all interest  accrued and unpaid
thereon, and all other amounts payable by the Borrower under this Agreement, the
Notes,  the other Loan  Documents and any other  agreement or security  document
contemplated by or delivered in connection with this Agreement,  to be forthwith
due and payable,  whereupon  all such amounts  shall become and be forthwith due
and payable,  without presentment for payment, demand, protest, notice of intent
to  accelerate,  notice of  acceleration  or further  notice of any kind, all of
which are hereby expressly waived by the Borrower,  and the Agent may direct the
beneficiary  of any  outstanding  Letter of Credit to make a drawing  under such
Letter of Credit in an amount equal to the full amount available  thereunder and
require from the Borrower immediate  reimbursement for payments made pursuant to
such  drawing,  or the Agent may direct the Borrower to deposit with the Issuing
Bank cash equal to the aggregate amount of all Outstanding  Letters of Credit as
security for the Borrower's obligations in respect of such Letters of Credit.

                       Section  7.02.  Setoff  in  Event  of  Default.  Upon the
occurrence and during the  continuance  of any Event of Default,  each member of
the Bank Group is hereby authorized,  at any time and from time to time, without
notice to the Borrower (any such notice being expressly  waived by the Borrower)
and to the fullest extent  permitted by applicable  law, to setoff and apply any
and all  deposits at any time held and other  indebtedness  at any time owing by
such member of the Bank Group (or any branch,  subsidiary  or  affiliate of such
member of the Bank  Group) to or for the credit or the  account of the  Borrower
against any and all of the obligations of the Borrower or any other Person,  now
or  hereafter  existing  under  this  Agreement,  the  Notes or the  other  Loan
Documents,  irrespective  of whether or not such  member of the Bank Group shall
have made any demand for  satisfaction  of such  obligations  and although  such
obligations may be unmatured. Any member of the Bank Group exercising such right
agrees to notify the  Borrower  promptly  after any such setoff and  application
made by such  Person;  provided,  that the failure to give such notice shall not
affect the validity of such setoff and application. The rights of the Bank Group
under this Section 7.02 are in addition to other rights and remedies (including,
without  limitation,  other  rights of  setoff)  which  the Bank  Group may have
hereunder or under any applicable law.


HOU04:43581.4






                       Section 7.03. No Waiver; Remedies. No failure on the part
of any member of the Bank Group to  exercise,  or any delay in  exercising,  any
right  hereunder  shall  operate  as a waiver  thereof,  nor shall any single or
partial  exercise of any right hereunder  preclude any other or further exercise
thereof or the  exercise  of any other  right.  The  remedies  provided  in this
Agreement are  cumulative  and not exclusive of any remedies  provided in any of
the other Loan Documents or by law.

                       Section 7.04. Hydrocarbon Proceeds. Notwithstanding that,
by the  terms  of the  various  Security  Documents,  Borrower  is and  will  be
absolutely and unconditionally assigning to the Agent for the ratable benefit of
the Banks all Hydrocarbons and all proceeds  therefrom  accruing to the interest
of the Borrower in the  Mortgaged  Property,  so long as no Event of Default has
occurred the Borrower  shall have the right  (revocable at any time by the Agent
upon the  occurrence  of an Event of Default) to receive from the  purchasers of
production all such Hydrocarbon proceeds, subject, however, to the Liens created
under the Security Documents, which Liens are hereby affirmed and ratified. Upon
the  occurrence  of an Event of Default,  the Agent may  exercise all rights and
remedies  granted  under the Security  Documents,  including the right to obtain
possession  of all such  Hydrocarbon  proceeds  then held by the  Borrower or to
receive  directly from the purchasers of production  all other such  Hydrocarbon
proceeds. In no case shall any failure, whether purposed or inadvertent,  by the
Agent to collect directly any such Hydrocarbon  proceeds constitute in any way a
waiver,  remission or release of any of its rights under the Security Documents,
nor shall  any  release  of any such  Hydrocarbon  proceeds  by the Agent to the
Borrower constitute a waiver, remission or release of any other such Hydrocarbon
proceeds  or of  any  rights  of  the  Agent  to  collect  other  such  proceeds
thereafter.

                       Section 7.05. Application of Proceeds After Acceleration.
If any Event of  Default  shall  have  occurred  and be  continuing,  and if the
Obligations  have become due and payable,  all cash collateral held by the Agent
under  this  Agreement  and the  proceeds  of any  sale,  disposition  or  other
realization  by the Agent upon the Mortgaged  Property (or any portion  thereof)
pursuant to the Security Documents,  shall be distributed in whole or in part by
the Agent in the following order of priority,  unless otherwise  directed by all
of the Banks:

                       First,  to the Agent  and the  Co-Agent,  ratably,  in an
      amount  equal to all costs and  expenses of the Agent and the Co-Agent due
      and payable as of the date of such distribution;

                       Second, to the Banks,  ratably, in an amount equal to all
      accrued  interest  and fees owing to the Banks under the Credit  Agreement
      due and payable as of the date of such  distribution;  provided,  however,
      that in case such proceeds shall be  insufficient  to pay in full all such
      Obligations,  then  to the  payment  thereof  to the  Banks,  ratably,  in
      proportion to its  percentage  of the sum of the aggregate  amounts of all
      such Obligations;


HOU04:43581.4






                       Third, to the Banks,  ratably,  in an amount equal to all
      unreimbursed  drawings  under the Letters of Credit owing to the Banks due
      and payable as of the date of such distribution;  provided,  however, that
      in case  such  proceeds  shall  be  insufficient  to pay in full  all such
      Obligations,  then  to the  payment  thereof  to the  Banks,  ratably,  in
      proportion to its  percentage  of the sum of the aggregate  amounts of all
      such Obligations;

                       Fourth, to the Banks,  ratably, in an amount equal to the
      principal of all Loans owing to the Banks under the Credit  Agreement  due
      and payable as of the date of such distribution;  provided,  however, that
      in case  such  proceeds  shall  be  insufficient  to pay in full  all such
      Obligations,  then  to the  payment  thereof  to the  Banks,  ratably,  in
      proportion to its  percentage  of the sum of the aggregate  amounts of all
      such Obligations;

                       Fifth, to the Agent as cash collateral in an amount equal
      to all Outstanding Letters of Credit;

                       Sixth, to the Banks,  ratably,  in an amount equal to all
      amounts  owing to the  Banks  under  all Bank  Group  Derivatives  due and
      payable as of the date of such distribution;  provided,  however,  that in
      case  such  proceeds  shall  be  insufficient  to pay  in  full  all  such
      Obligations,  then  to the  payment  thereof  to the  Banks,  ratably,  in
      proportion to its  percentage  of the sum of the aggregate  amounts of all
      such Obligations;

                       Seventh,  to the  Banks in an  amount  equal to all other
      Obligations due and payable as of the date of such distribution; provided,
      however,  that in case such proceeds shall be  insufficient to pay in full
      all such Obligations,  then to the payment thereof to the Banks,  ratably,
      in proportion to its percentage of the sum of the aggregate amounts of all
      such Obligations; and

                       Eighth, to the extent of any surplus, to the Borrower, as
its interests may appear, except as may be provided otherwise by law;

it being  understood  that the Borrower shall remain liable to the extent of any
deficiency  between the amount of the proceeds of the Mortgaged Property and the
aggregate of the sums referred to in clauses First through Seventh above.


HOU04:43581.4






                              ARTICLE VIII
              THE AGENT, THE CO-AGENT AND THE ISSUING BANK

                       Section 8.01.  Authorization and Action. Each Bank hereby
appoints  and  authorizes  the Agent and the Issuing Bank to take such action in
such  capacity on such  Bank's  behalf and to  exercise  such powers  under this
Agreement  and the other Loan  Documents  as are  delegated  to the Agent or the
Issuing Bank by the terms hereof and thereof,  together  with such powers as are
reasonably  incidental  thereto. As to any matters not expressly provided for by
this Agreement (including, without limitation,  enforcement or collection of the
Notes or of amounts owing under the other Loan Documents), neither the Agent nor
the  Issuing  Bank shall be  required to  exercise  any  discretion  or take any
action,  but shall be  required  to act or to refrain  from acting (and shall be
fully protected in so acting or refraining from acting) upon the instructions of
the Majority Banks,  and such  instructions  shall be binding upon all Banks and
any other holders of Notes;  provided,  however,  that neither the Agent nor the
Issuing Bank shall be required to take any action  which  exposes it to personal
liability or which is contrary to the Loan Documents or applicable  law. Each of
the Agent and the Issuing Bank is hereby  expressly  authorized on behalf of the
other members of the Bank Group,  without hereby limiting any implied authority,
(a) to  receive  on behalf of each of the other  members  of the Bank  Group any
payment of  principal  of or interest on the Loans  outstanding  hereunder,  any
Letters of Credit and all other amounts accrued  hereunder paid to such Persons,
and  promptly to  distribute  to each other  member of the Bank Group its proper
share of all payments so received;  (b) to give notice within a reasonable  time
on behalf of each other  member of the Bank Group to the Borrower of any Default
or Event of Default  specified  in this  Agreement of which the Agent has actual
knowledge as provided in Section 8.09; (c) to distribute to the other members of
the Bank Group copies of all notices,  agreements and other material as provided
for in this  Agreement as received by such Person;  and (d) to distribute to the
Borrower any and all  requests,  demands and  approvals  received by such Person
from any other  member of the Bank  Group.  Nothing  herein  contained  shall be
construed  to  constitute  the Agent or the  Issuing  Bank as a trustee  for any
holder of the Notes or of a  participation  therein,  nor to impose on the Agent
any duties or obligations  other than those  expressly  provided for in the Loan
Documents.

                       Section  8.02.  Reliance,  Etc.  None of the  Agent,  the
Issuing Bank, their Affiliates and their respective directors,  officers, agents
or  employees  shall be liable for any action taken or omitted to be taken by it
or them under or in connection with this Agreement,  except for its or their own
gross negligence or willful misconduct.  Without limitation of the generality of
the  foregoing,  the Agent and the Issuing Bank:  (a) may treat the payee of any
Note as the holder  thereof  until the Agent  receives and accepts an Assignment
and  Acceptance  entered  into by the Bank which is the payee of such  Note,  as
assignor,  and an Eligible Assignee,  as assignee,  as provided in Section 9.02;
(b) may  consult  with  legal  counsel  (including  counsel  for the  Borrower),
independent public accountants and other experts selected by it and shall not be
liable  for any  action  taken or  omitted  to be  taken in good  faith by it in
accordance with the advice of such counsel, accountants or experts; (c) makes no

HOU04:43581.4







warranty or  representation to any Bank and shall not be responsible to any Bank
for any statements, warranties or representations (whether written or oral) made
in or in connection with this Agreement or the other Loan  Documents;  (d) shall
not have any duty to ascertain or to inquire as to the performance or observance
of any of the terms, covenants or conditions of this Agreement or the other Loan
Documents  on the part of the  Borrower  or any other  Person or to inspect  the
property  (including the books and records) of the Borrower or any other Person;
(e)  shall  not be  responsible  to any  Bank for the due  execution,  legality,
validity,  enforceability,   genuineness,  sufficiency  or  value  of  any  Loan
Document,  any  collateral  provided for  therein,  or any other  instrument  or
document furnished  pursuant thereto;  and (f) shall incur no liability under or
in respect of this Agreement by acting upon any notice, consent,  certificate or
other  instrument or writing  (which may be by  telecopier,  telegram,  cable or
telex)  believed by it to be genuine  and signed or sent by the proper  party or
parties.  None of the  Agent,  the  Issuing  Bank,  their  Affiliates  and their
respective   directors,   officers,   employees   or  agents   shall   have  any
responsibility to the Borrower on account of the failure or delay in performance
or  breach  by any Bank of any of its  obligations  hereunder  or to any Bank on
account of the failure of or delay in performance or breach by any other Bank or
the  Borrower of any of its  obligations  hereunder or in  connection  herewith;
provided,  however, that the foregoing shall not relieve BTCo of its obligations
as a Bank hereunder.

                       Section 8.03. BTCo and Affiliates.  Without  limiting the
right of any other Bank to engage in any business transactions with the Borrower
or any of its Affiliates,  with respect to its Commitment, the Loans made by it,
the Notes  issued to it and its interest in the  Outstanding  Letters of Credit,
Bankers Trust Company  ("BTCo") shall have the same rights and powers under this
Agreement  as any other Bank and may exercise the same as though it were not the
Issuing  Bank or the  Agent;  and the  term  "Bank"  or  "Banks"  shall,  unless
otherwise expressly indicated, include BTCo in its individual capacity. BTCo, or
any of its  Affiliates,  may be engaged in, or may  hereafter  engage in, one or
more loan, Letter of Credit,  leasing,  derivative or other financing activities
not the subject of the Loan  Documents  (collectively,  the "Other  Financings")
with the Borrower or any of its Affiliates,  or may act as trustee on behalf of,
or depositary for, or otherwise engage in other business  transactions  with the
Borrower or any of its Affiliates (all Other  Financings and other such business
transactions being collectively,  the "Other Activities") with no responsibility
to account  therefor to the Banks.  Without  limiting the rights and remedies of
the Banks specifically set forth in the Loan Documents, no other Bank shall have
any interest in (a) any Other Activities, (b) any present or future guarantee by
or for the  account of the  Borrower  not  contemplated  or included in the Loan
Documents,  (c) any present or future offset exercised by BTCo in respect of any
such Other Activities,  (d) any present or future property taken as security for
any such Other Activities or (e) any property now or hereafter in the possession
or control of BTCo which may be or become  security for the  obligations  of the
Borrower  under  the Loan  Documents  by reason of the  general  description  of
indebtedness  secured,  or of  property,  contained  in  any  other  agreements,
documents or instruments related to such Other Activities; provided, that if any

HOU04:43581.4






payment in respect of such  guarantees or such property or the proceeds  thereof
shall be applied to reduction of the obligations  evidenced hereunder and by the
Notes,  then each Bank shall be entitled to share in such application  according
to its pro rata portion of such obligations.

                       Section   8.04.   Bank   Credit   Decision.   Each   Bank
acknowledges  that it has,  independently  and without  reliance  upon any other
member of the Bank Group and based on the  financial  statements  referred to in
Section  4.06  and  such  other  documents  and  information  as it  has  deemed
appropriate,  made its own  credit  analysis  and  decision  to enter  into this
Agreement.  Each Bank also acknowledges that it will,  independently and without
reliance upon any other member of the Bank Group and based on such documents and
information as it shall deem  appropriate at the time,  continue to make its own
credit decisions in taking or not taking action under this Agreement.

                       Section  8.05.   Indemnification.   The  Banks  agree  to
indemnify each of the Agent and the Issuing Bank,  the Co-Agent,  its Affiliates
or any of their  respective  directors,  officers,  agents or employees  (to the
extent not  reimbursed by the  Borrower),  ratably  according to its  Commitment
Percentages,  from and against  any and all  liabilities,  obligations,  losses,
damages, penalties,  actions, judgments, suits, costs, expenses or disbursements
of any kind or  nature  whatsoever  which may be  imposed  on,  incurred  by, or
asserted  against any such Person in any way  relating to or arising out of this
Agreement or the other Loan Documents or any action taken or omitted by any such
Person under this Agreement or the other Loan Documents,  provided, that no Bank
shall be  liable  for any  portion  of such  liabilities,  obligations,  losses,
damages, penalties,  actions, judgments, suits, costs, expenses or disbursements
resulting from such Person's gross negligence or willful  misconduct.  IT IS THE
EXPRESS  INTENTION  OF THE PARTIES  HERETO  THAT THE AGENT,  THE  CO-AGENT,  THE
ISSUING  BANK AND THEIR  AFFILIATES  AND THEIR  DIRECTORS,  OFFICERS,  AGENTS OR
EMPLOYERS  SHALL  BE  INDEMNIFIED   AND  HELD  HARMLESS   AGAINST  ANY  AND  ALL
LIABILITIES, OBLIGATIONS, LOSSES, DAMAGES, PENALTIES, ACTIONS, JUDGMENTS, SUITS,
COSTS,  EXPENSES OR  DISBURSEMENTS  OF ANY KIND ARISING OUT OF OR RESULTING FROM
THE ORDINARY NEGLIGENCE  (WHETHER SOLE OR CONTRIBUTORY) OF SUCH PERSON.  Neither
the Agent,  the Issuing  Bank nor the  Co-Agent  shall be required to do any act
hereunder or under any other  document or instrument  delivered  hereunder or in
connection  herewith or take any action toward the execution or  enforcement  of
the agencies  hereby  created,  or to prosecute or defend any suit in respect of
this  Agreement  or the  Loan  Documents  or  any  collateral  security,  unless
indemnified to its  satisfaction by the holders of the Notes against loss, cost,
liability,  and expense.  If any indemnity  furnished to the Agent,  the Issuing
Bank  and the  Co-Agent  for any  purpose  is,  in the  opinion  of such  Person
insufficient or becomes impaired,  such Person may call for additional indemnity
and not  commence  or  cease  to do the  acts  indemnified  against  until  such
additional  indemnity is furnished.  Without  limitation of the foregoing,  each
Bank agrees to reimburse  the Agent,  the Issuing Bank or the Co-Agent  promptly
upon  demand for its  ratable  share of any  out-of-pocket  expenses  (including

HOU04:43581.4







counsel  fees)  incurred  by such  Person in  connection  with the  preparation,
execution,  delivery,  administration,  modification,  amendment or  enforcement
(whether  through  negotiations,  legal  proceedings  or otherwise) of, or legal
advice in respect of rights or  responsibilities  under,  this Agreement and the
other Loan  Documents,  to the extent that the Agent,  the  Issuing  Bank or the
Co-Agent is not reimbursed for such expenses by the Borrower.

                       Section  8.06.  Employees  of the Agent  and the  Issuing
Bank. Each of the Agent and the Issuing Bank may execute any of their respective
duties  under this  Agreement,  the other  Loan  Documents  and any  instrument,
agreement or document  executed,  issued or delivered pursuant hereto or thereto
or in connection  herewith or  therewith,  by or through  employees,  agents and
attorneys-in-fact,  and shall not be answerable for the default or misconduct of
any such  employee,  agent or  attorney-in-fact  selected by it with  reasonable
care.  Each of the  Agent  and the  Issuing  Bank  may,  and  upon  the  written
instruction  of the  Majority  Banks  shall,  enforce on behalf of the Banks any
claims  which the Agent  and/or the Banks may have  against  any such  employee,
agent or  attorney-in-fact,  and any recovery therefrom shall be applied for the
pro rata benefit of the Banks.

                       Section 8.07.  Successor  Agent.  The Agent may resign at
any time by giving written notice thereof to the other members of the Bank Group
and the  Borrower  and may be removed  at any time with or without  cause by the
Majority Banks.  Upon any such resignation or removal,  the Majority Banks shall
have the right to appoint a successor  Agent.  If no successor  Agent shall have
been  so  appointed  by  the  Majority  Banks,  and  shall  have  accepted  such
appointment, within thirty (30) days after the retiring Agent's giving of notice
of resignation or the Majority  Banks' removal of the retiring  Agent,  then the
retiring  Agent may, on behalf of the Banks,  appoint a successor  Agent,  which
shall be a commercial bank or corporation organized under the laws of the United
States of America or of any State  thereof  and  having a combined  capital  and
surplus of at least  $500,000,000.  Upon the  acceptance of any  appointment  as
Agent  hereunder by a successor  Agent,  such  successor  Agent shall  thereupon
succeed to and become vested with all the rights, powers,  privileges and duties
of the retiring  Agent,  and the  retiring  Agent shall be  discharged  from its
duties and  obligations  under this Agreement,  subject to the requirement  that
such retiring  Agent will execute such documents and take such actions as may be
necessary or desirable to cause the  successor  Agent to be vested with all such
rights, powers, privileges and duties. After any retiring Agent's resignation or
removal  hereunder as Agent,  the provisions of this Article VIII shall inure to
its  benefit as to any  actions  taken or omitted to be taken by it while it was
Agent under this Agreement.  All reasonable  costs and expenses  incurred by the
Bank Group in connection with any amendments or other documentation  required by
this Section 8.07 shall be paid by the Borrower pursuant to Section 9.04 hereof.

                       Section 8.08.  Successor  Co-Agent and Successor  Issuing
Bank.  (a) The Co-Agent may resign at any time by giving  written notice thereof
to the other  members of the Bank Group and the  Borrower  and may be removed at
any time with or without cause by the Majority Banks. Upon any such resignation

HOU04:43581.4






or  removal,  the  Majority  Banks  shall have the right to appoint a  successor
Co-Agent.  If no successor Co-Agent shall have been so appointed by the Majority
Banks, and shall have accepted such  appointment,  within thirty (30) days after
the retiring  Co-Agent's  giving of notice of resignation or the Majority Banks'
removal of the retiring  Co-Agent,  then the retiring Co-Agent may, on behalf of
the Banks,  appoint a  successor  Co-Agent,  which  shall be a  commercial  bank
organized under the laws of the United States of America or of any State thereof
and having a combined  capital  and surplus of at least  $500,000,000.  Upon the
acceptance of any  appointment  as Co-Agent  hereunder by a successor  Co-Agent,
such successor  Co-Agent shall  thereupon  succeed to and become vested with all
the rights,  powers,  privileges  and duties of the retiring  Co-Agent,  and the
retiring Co-Agent shall be discharged from its duties and obligations under this
Agreement,  subject to the requirement that such retiring  Co-Agent will execute
such  documents  and take such actions as may be necessary or desirable to cause
the successor Co-Agent to be vested with all such rights, powers, privileges and
duties.  After any  retiring  Co-Agent's  resignation  or removal  hereunder  as
Co-Agent,  the  provisions of this Article VIII shall inure to its benefit as to
any actions taken or omitted to be taken by it while it was Co-Agent  under this
Agreement.  All  reasonable  costs and  expenses  incurred  by the Bank Group in
connection with any amendments or other  documentation  required by this Section
8.08 shall be paid by the Borrower pursuant to Section 9.04 hereof.

                       (b) The  Issuing  Bank may  resign  at any time by giving
written  notice  thereof to the other members of the Bank Group and the Borrower
and may be removed at any time with or without cause by the Majority Banks. Upon
any such  resignation  or removal,  the  Majority  Banks shall have the right to
appoint a successor  Issuing Bank. If no successor  Issuing Bank shall have been
so appointed by the Majority  Banks,  and shall have accepted such  appointment,
within  thirty (30) days after the retiring  Issuing  Bank's giving of notice of
resignation or the Majority  Banks' removal of the retiring  Issuing Bank,  then
the  retiring  Issuing  Bank may,  on behalf of the Banks,  appoint a  successor
Issuing Bank,  which shall be a commercial  bank or corporation  organized under
the laws of the United  States of America or of any state  thereof  and having a
combined  capital and surplus of at least  $500,000,000.  Upon the acceptance of
any  appointment  as Issuing Bank  hereunder by a successor  Issuing Bank,  such
successor Issuing Bank shall thereupon succeed to and become vested with all the
rights,  powers,  privileges  and duties of the retiring  Issuing Bank,  and the
retiring Issuing Bank shall be discharged from its duties and obligations  under
this Agreement,  subject to the requirement that such retiring Issuing Bank will
execute such documents and take such actions as may be necessary or desirable to
cause the  successor  Issuing  Bank to be vested with all such  rights,  powers,
privileges and duties.  Without  limiting the  generality of the foregoing,  the
Borrower,  the retiring  Issuing Bank and the successor  Issuing Bank will cause
each Letter of Credit issued by the retiring  Issuing Bank to be terminated  and
replaced by a Letter of Credit issued by the successor  Issuing Bank.  After any
retiring  Issuing Bank's  resignation or removal  hereunder as Issuing Bank, the
provisions  of this  Article  VIII shall  inure to its benefit as to any actions
taken  or  omitted  to be  taken by it while  it was  Issuing  Bank  under  this
Agreement.  All costs and expenses incurred by the Bank Group in connection with

HOU04:43581.4







any amendments or other documentation  required by this Section 8.08(b) shall be
paid by the Borrower pursuant to Section 9.04 hereof.

                       Section 8.09.  Notice of Default.  The Agent shall not be
deemed to have  knowledge or notice of the occurrence of any Default or Event of
Default  hereunder  unless  it shall  have  received  notice  from a Bank or the
Borrower  referring  to this  Agreement,  describing  such  Default  or Event of
Default  and  stating  that such  notice is a "notice of  default" or "notice of
event of default," as  applicable.  If the Agent receives such a notice from the
Borrower,  the Agent shall give notice  thereof to the other members of the Bank
Group and, if such notice is received  from a Bank,  the Agent shall give notice
thereof to the other members of the Bank Group and the Borrower. The Agent shall
be entitled to take action or refrain  from taking  action with  respect to such
Default or Event of Default as provided in this Article VIII.

                       Section 8.10. Execution of Loan Documents. Each member of
the Bank Group hereby  authorizes  and directs the Agent and the Issuing Bank to
execute and deliver on its behalf each Loan Document to be executed by the Agent
pursuant to the terms of this Agreement.



HOU04:43581.4






                               ARTICLE IX
                             MISCELLANEOUS

                       Section 9.01. Amendments,  Etc. No amendment or waiver of
any provision of this Agreement, any Note or any other Loan Document, or consent
to any  departure  by any Person  herefrom or  therefrom,  shall in any event be
effective unless the same shall be in writing and signed by the Borrower and the
Majority  Banks,  and then such waiver or consent shall be effective only in the
specific instance and for the specific purpose for which given;  provided,  that
no amendment,  waiver or consent shall,  unless in writing and signed by all the
Banks,  do any of the following:  (a) waive any of the  conditions  specified in
Article III, (b) increase the  Commitments  of the Banks or subject the Banks to
any  additional  obligations,  (c) reduce the  principal of, or interest on, the
Notes, the reimbursement  obligations in respect of the Letters of Credit or any
fees or other  amounts  payable  hereunder,  (d) postpone any date fixed for any
payment  of  principal  of,  or  interest  on,  the  Notes,  the   reimbursement
obligations  in  respect of the  Letters of Credit or any fees or other  amounts
payable hereunder, (e) release the Borrower or any other Person from its payment
obligations to the Bank Group,  regardless of whether such obligations are those
of a primary  obligor,  a guarantor or surety,  or otherwise,  (f) authorize the
Agent to release Liens against a substantial  portion of any collateral  covered
by the Security Documents,  (g) take action which expressly requires the signing
of all the  Banks  pursuant  to the  terms of this  Agreement,  (h)  reduce  the
Commitment Percentages or the aggregate unpaid principal amount of the Notes, or
the number of Banks,  as the case may be,  required  for the Agent,  the Issuing
Bank or the Banks or any of them to take any  action  under  this  Agreement  or
reduce  the  percentage  of  Majority  Banks or (i)  amend  this  Section  9.01;
provided,  further,  that no  amendment,  waiver or consent  shall (1) unless in
writing and signed by the  Co-Agent in addition to the Banks  required  above to
take such  action,  affect  the  rights or duties  of the  Co-Agent  under  this
Agreement or any other Loan Document and (2) unless in writing and signed by the
Issuing Bank in addition to the Banks required above to take such action, affect
the rights or duties of the Issuing  Bank under this  Agreement,  the Letters of
Credit,   Letter  of  Credit   Applications,   or  any  other   Loan   Document.
Notwithstanding the foregoing,  the Agent may (without the consent of the Banks)
release  the Lien  created  under the  Security  Documents  on any assets of the
Borrower  or any of its  Subsidiaries  if the sale of such  assets is  permitted
under Section 6.07.

                       Section 9.02.  Participation  Agreements and Assignments.
(a) Each Bank may assign to one or more  Eligible  Assignees all or a portion of
its rights and obligations under this Agreement (including,  without limitation,
all or a portion of its  Commitment  and the Loans  owing to it, the Note or the
Notes  held by it, its  interest  in the  Outstanding  Letters of Credit and the
other Loan  Documents);  provided,  that (i) each such assignment  shall be of a
constant,  and not a varying,  percentage of all rights and  obligations  of the
assignor  under this Agreement and the other Loan  Documents,  and no assignment
shall be made unless it covers a pro rata share of all rights and obligations of
such assignor under this Agreement and the other Loan Documents, (ii) the amount
of the  Commitment of the assigning  Bank being  assigned  pursuant to each such

HOU04:43581.4







assignment  (determined as of the date of the  Assignment  and  Acceptance  with
respect to such  assignment)  shall,  unless otherwise agreed to by the Agent or
unless such  assignment  is to a member of the Bank  Group,  in no event be less
than $5,000,000, (iii) each such assignment to an Eligible Assignee who is not a
member of the Bank Group must be  approved  by the Agent and (iv) the parties to
each such assignment  shall execute and deliver to the Agent, for its acceptance
and recording in the Register  (defined  below),  an Assignment and  Acceptance,
together with any Note subject to such  assignment and a recordation  fee in the
amount of $3,500 for processing such assignment. Upon such execution,  delivery,
acceptance  and  recording,  from and after the effective date specified in each
Assignment and Acceptance,  (x) the assignee  thereunder shall be a party hereto
and, to the extent that rights and  obligations  under the Loan  Documents  have
been assigned to it pursuant to such Assignment and Acceptance,  have the rights
and  obligations  of a Bank under the Loan  Documents,  (y) the  assigning  Bank
thereunder  shall,  to the extent  that  rights and  obligations  under the Loan
Documents have been assigned by it pursuant to such  Assignment and  Acceptance,
relinquish  its rights and be released from further  obligations  under the Loan
Documents (and, in the case of an Assignment and Acceptance  covering all or the
remaining  portion of an  assigning  Bank's  rights and  obligations  under this
Agreement, such Bank shall cease to be a party hereto) and (z) be deemed to have
made,  as  of  such   effective   date,  to  the  Agent  and  the  Borrower  the
representations and warranties set forth in Section 2.12(f) hereof.

                       (b)  By  executing  and   delivering  an  Assignment  and
Acceptance, the assigning Bank thereunder and the assignee thereunder confirm to
and agree with each other and the other  parties  hereto as  follows:  (i) other
than as provided in such Assignment and Acceptance, such assigning Bank makes no
representation  or warranty  and assumes no  responsibility  with respect to any
statements, warranties or representations made in or in connection with the Loan
Documents or the execution,  legality,  validity,  enforceability,  genuineness,
sufficiency  or value of this  Agreement  or any other  instrument  or  document
furnished  pursuant hereto;  (ii) such assigning Bank makes no representation or
warranty and assumes no responsibility  with respect to the financial  condition
of the  Borrower or any other Person or the  performance  or  observance  by the
Borrower or any other Person of any of its  obligations  under this Agreement or
any other instrument or document furnished pursuant hereto;  (iii) such assignee
confirms  that it has  received  a copy of this  Agreement  and the  other  Loan
Documents,  together  with  copies of the  financial  statements  referred to in
Section  4.06  and  such  other  documents  and  information  as it  has  deemed
appropriate  to make its own credit  analysis  and  decision  to enter into such
Assignment and Acceptance;  (iv) such assignee will,  independently  and without
reliance upon any member of the Bank Group  (including  such assigning Bank) and
based on such  documents and  information  as it shall deem  appropriate  at the
time,  continue to make its own credit  decisions in taking or not taking action
under  this  Agreement;  (v)  such  assignee  confirms  that  it is an  Eligible
Assignee;  (vi) such assignee  appoints and authorizes the Agent and the Issuing
Bank,  to take such action on its behalf and to exercise  such powers under this
Agreement  and the other Loan  Documents as are  delegated to such Person by the

HOU04:43581.4







terms thereof,  together with such powers as are reasonably  incidental thereto;
and (vii) such  assignee  agrees that it will perform in  accordance  with their
terms all of the obligations  which by the terms of this Agreement and the other
Loan Documents are required to be performed by it as a Bank.

                       (c) The Agent shall  maintain at its address  referred to
in  Section  9.03 a copy of each  Assignment  and  Acceptance  delivered  to and
accepted by it and a register for the  recordation of the names and addresses of
the Banks and the  Commitment  of, and  principal  amount of the Loans owing to,
each Bank from time to time (the "Register").  The entries in the Register shall
be  conclusive  and binding for all purposes,  absent  manifest  error,  and the
Borrower  and each member of the Bank Group may treat each Person  whose name is
recorded in the Register as a Bank hereunder for all purposes of this Agreement.
The Register  shall be available for inspection by the Borrower or any member of
the Bank  Group at any  reasonable  time and from time to time  upon  reasonable
prior notice.

                       (d) Upon its  receipt  of an  Assignment  and  Acceptance
executed  by an  assigning  Bank  and an  assignee  representing  that  it is an
Eligible  Assignee,  together with any Notes subject to such  assignment and the
administrative fee payable to the Agent for such assignment, the Agent shall, if
such  Assignment and Acceptance has been completed and is in  substantially  the
form of Exhibit 9.02 hereto,  (i) accept such  Assignment and  Acceptance,  (ii)
record the information  contained  therein in the Register and (iii) give prompt
notice thereof to the Borrower.  Within five (5) Business Days after its receipt
of such notice, the Borrower,  at its own expense,  shall execute and deliver to
the Agent, in exchange for the surrendered Notes, new Notes to the order of such
Eligible Assignee in an amount  corresponding to the Commitment  assumed by such
Eligible  Assignee  pursuant  to such  Assignment  and  Acceptance  and,  if the
assigning  Bank has retained a Commitment  hereunder,  new Notes to the order of
the assigning Bank in an amount  corresponding to the Commitment  retained by it
hereunder. Such new Notes shall be in an aggregate principal amount equal to the
aggregate  principal  amount  of such  surrendered  Notes,  shall be  dated  the
effective  date of such  Assignment  and  Acceptance  and shall  otherwise be in
substantially the form prescribed by Section 2.05 hereto.

                       (e)  Each  Bank may  sell  participations  to one or more
banks or other entities in or to all or a portion of its rights and  obligations
under this Agreement  (including,  without  limitation,  all or a portion of its
Commitment and the Loans owing to it and its interest in the Outstanding Letters
of Credit);  provided,  that (i) such Bank's  obligations  under this  Agreement
(including,  without  limitation,  its Commitment to the Borrower hereunder) and
the other Loan  Documents  shall remain  unchanged,  (ii) such Bank shall remain
solely  responsible  to the other  parties  hereto for the  performance  of such
obligations,  and  the  participating  banks  or  other  entities  shall  not be
considered a "Bank" for purposes of the Loan Documents,  (iii) the participating
banks or other  entities  shall be  entitled to the cost  protection  provisions
contained  in Sections  2.11  through 2.14 to the same extent that the Bank from

HOU04:43581.4







which such participating  bank or other entity acquired its participation  would
be  entitled  to the  benefit  of such cost  protection  provisions,  so long as
Borrower is not obligated to pay any amount under such Sections in excess of the
amount  that  would  have  been  due to such  Bank  under  such  Sections  if no
participations  had been made by such Bank,  and (iv) the Borrower and the other
members of the Bank Group shall  continue to deal solely and directly  with such
Bank in connection with such Bank's rights and obligations  under this Agreement
and the other  Loan  Documents,  and such Bank  shall  retain  the sole right to
enforce the obligations of the Borrower relating to the Loans and the Letters of
Credit and to approve any amendment,  modification or waiver of any provision of
this Agreement (other than amendments,  modifications or waivers with respect to
the amounts of any fees  payable  hereunder or the amount of principal of or the
rate  at  which  interest  is  payable  on  the  Loans  or  the  amount  of  any
reimbursement  obligations  payable  with respect to any Letter of Credit or the
dates fixed for payments of principal or interest on the Loans or  reimbursement
obligations in respect of any Letters of Credit).

                       (f) Any Bank may at any time  pledge or assign all or any
portion of its rights under this  Agreement and the other Loan  Documents to any
Federal  Reserve  Bank  without  notice to or consent of the  Borrower.  No such
pledge or  assignment  shall  release the  assigning  Bank from its  obligations
hereunder.

                       (g) The Agent, the Issuing Bank and each Bank may furnish
any information concerning the Borrower or its Subsidiaries in the possession of
the Agent or such Bank from time to time to Affiliates of the Agent or such Bank
(including  without  limitation,  in the  case  of  Bankers  Trust  Company,  BT
Securities  Corporation  and its  employees,  to the  extent  necessary  for the
purposes  contemplated by this Agreement,  including,  without  limitation,  the
syndication of the credit  facilities  contemplated  hereby) and, in the case of
each Bank, to assignees and participants  (including  prospective  assignees and
participants)  of such Bank. Each Bank will take reasonable steps to protect the
confidentiality  of any information  concerning the Borrower or its Subsidiaries
provided to a  respective  participant  or assignee and known by such Bank to be
confidential,  and, if requested by the  Borrower,  such Bank will  identify the
prospective assignees and participants that have received such information.

                       Section 9.03. Notices.  All  correspondence,  statements,
notices,  requests  and  demands  (collectively  "Communications")  shall  be in
writing  (including   telegraphic   Communications)  and  mailed,   telegraphed,
telecopied, facsimile transmitted or delivered as follows:

      if to the Borrower --

                       Abraxas Petroleum Corporation
                       500 North Loop 1604 East, Suite 100
                       San Antonio, Texas 78232
                       Attention: Robert L.G. Watson
                       Telecopier: (210) 490-8816

HOU04:43581.4







      if to the Issuing Bank or the Agent--

                       Bankers Trust Company
                       130 Liberty Street, 14th Floor
                       New York, New York 10006
                       Attention:  James T. Cullen
                       Telecopier: (212) 250-6029 or (212) 250-7351

      with a copy to --

                       BT Southwest, Inc.
                       909 Fannin Street, Suite 3000
                       Houston, Texas 77010
                       Attention: Roberta Bohn
                       Telecopier: (713) 759-6708

if to any Bank, at its Domestic  Lending  Office,  or as to each such party,  at
such other address as such party shall designate in a written  Communication  to
each of the other parties hereto. All such Communications shall be effective, in
the case of written or telegraphed  Communications,  when deposited in the mails
or  delivered  to the  telegraph  company,  respectively,  and, in the case of a
Communication  by  telecopy  or  facsimile  transmission,   when  telecopied  or
transmitted  against  receipt  of a  confirmation,  in each  case  addressed  as
aforesaid,  except that  Communications to any member of the Bank Group pursuant
to Article II and Article  VIII shall not be  effective  until  received by such
Persons.

                       Section 9.04. Costs and Expenses.  The Borrower agrees to
pay promptly (a) all reasonable costs and expenses  (including fees and expenses
of legal  counsel)  of any of the  Agent,  the  Co-Agent  and the  Issuing  Bank
incurred  in  connection  with the  preparation,  execution,  delivery,  filing,
administration  and recording of the Loan Documents and any other  agreements or
security  documents  delivered in connection with or pursuant to any of the Loan
Documents and the  syndication  of this Agreement both before and after the date
hereof,  and (b) all  reasonable  costs and  expenses  of any member of the Bank
Group incurred in connection  with the enforcement of the Loan Documents and any
other agreements or security  documents  executed in connection with or pursuant
to any of the Loan Documents, including, but not limited to, the reasonable fees
and  out-of-pocket  expenses of counsel  for any member of the Bank  Group,  and
local counsel who may be retained by such counsel, with respect thereto, and the
costs  and  expenses  in  connection  with  the  custody,  preservation,  use or
operation of, or the sale of, or collection from, or other  realization upon the
sale of, or collection from, or other realization upon any collateral covered by
any of the other documents executed in connection with or pursuant to any of the
Loan Documents.  The agreements of Borrower contained in this Section 9.04 shall
survive the  termination of the Commitments and the payment of all other amounts
owing hereunder or under any of the other Loan Documents.

HOU04:43581.4






                       Section  9.05.  Successors  and Assigns.  This  Agreement
shall be binding upon and inure to the benefit of the Borrower,  the Agent,  the
Issuing Bank, the Banks and their respective successors and assigns, except that
the Borrower may not assign or transfer its rights  hereunder  without the prior
written consent of the Banks.

                       Section 9.06.  Independence  of Covenants.  All covenants
contained in the Loan Documents shall be given  independent  effect so that if a
particular  action or condition is not permitted by any of such  covenants,  the
fact that such action or condition  would be  permitted  by an exception  to, or
otherwise be within the  limitations  of,  another  covenant shall not avoid the
occurrence  of a  Default  or an Event of  Default  if such  action  is taken or
condition exists.

                       Section 9.07. Survival of Representations and Warranties.
All  representations  and  warranties  contained in this Agreement and the other
Loan Documents or made in writing by the Borrower or the Guarantor in connection
herewith  or  therewith,  shall  survive  the  execution  and  delivery  of this
Agreement, the Notes and the other Loan Documents, the expiration of the Letters
of Credit and the repayment of the Loans. Any investigation by any member of the
Bank Group shall not  diminish in any  respect  whatsoever  its right to rely on
such representations and warranties.

                       Section 9.08. Separability.  Should any clause, sentence,
paragraph,  subsection,  Section  or  Article of this  Agreement  be  judicially
declared to be invalid,  unenforceable  or void, such decision will not have the
effect of  invalidating  or voiding the  remainder  of this  Agreement,  and the
parties  hereto  agree  that the part or parts of this  Agreement  so held to be
invalid,  unenforceable or void will be deemed to have been stricken herefrom by
the parties hereto, and the remainder will have the same force and effectiveness
as if such stricken part or parts had never been included herein.

            Section 9.09.  Captions.  The captions in this  Agreement  have been
inserted  for  convenience  only and shall be given no  substantive  meaning  or
significance   whatsoever  in  construing  the  terms  and  provisions  of  this
Agreement.

            Section 9.10.  Counterparts.  This  Agreement 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.

            Section 9.11.  Governing Law. THIS AGREEMENT (INCLUDING THE VALIDITY
AND  ENFORCEABILITY  HEREOF)  SHALL BE GOVERNED BY, AND  CONSTRUED IN ACCORDANCE
WITH,  THE LAWS OF THE STATE OF NEW YORK.  Chapter 15,  Subtitle 3, Title 79, of
the Revised Civil  Statutes of Texas,  1925,  as amended  (relating to revolving
loans and revolving triparty accounts), shall not apply to this Agreement or the
Notes or the transactions contemplated hereby.


HOU04:43581.4






            Section 9.12.  Submission to  Jurisdiction.  (a) The Borrower hereby
irrevocably  submits  to the  non-exclusive  jurisdiction  of any New York state
court  located in the Borough of  Manhattan,  City and State of New York, or any
federal  court  located in the Southern  District of New York over any action or
proceeding arising out of or relating to this Agreement or any of the other Loan
Documents,  and each of the  Borrower  irrevocably  agrees  that all  claims  in
respect of such action or  proceeding  may be heard and  determined  in such New
York state or federal court; provided,  nothing in this Section 9.12 is intended
to waive the right of any member of the Bank Group to remove any such  action or
proceeding commenced in any such New York state court to an appropriate New York
federal court to the extent the basis for such removal  exists under  applicable
law. The Borrower  hereby  irrevocably  appoints CT  Corporation  (the  "Process
Agent"), with an office on the date hereof at 1633 Broadway,  New York, New York
10019,  as its agent to  receive on behalf of it and its  properties  service of
copies of the summons and complaint and any other process which may be served in
any such action or proceeding.  Such service may be made by mailing by certified
mail a copy of such process to the Borrower in care of the Process  Agent at the
Process  Agent's  above  address,  with a copy to  such  Person  at its  address
specified  herein and each of the Borrower  hereby  irrevocably  authorizes  and
directs  the  Process  Agent  to  accept  such  service  on  its  behalf.  As an
alternative method of service, each of the Borrower also irrevocably consents to
the  service of any and all  process  in any such  action or  proceeding  by the
mailing  by  certified  mail of  copies  of such  process  to it at its  address
specified  herein.  The Borrower agrees that a final judgment in any such action
or proceeding shall be conclusive and may be enforced in other  jurisdictions by
suit on the judgment or in any other manner provided by law.

            (b)  Nothing  in this  Section  9.12  shall  affect the right of any
member of the Bank Group to serve legal process in any other manner permitted by
law or affect  the right of any  member of the Bank Group to bring any action or
proceeding against the Borrower,  or such Person's properties,  in the courts of
any other jurisdiction.

                       Section 9.13.  Limitation on Interest.  Each provision in
this  Agreement and each other Loan Document is expressly  limited so that in no
event  whatsoever  shall the amount paid, or otherwise agreed to be paid, by the
Borrower for the use,  forbearance  or detention of the money to be loaned under
this Agreement or any other Loan Document or otherwise  (including any sums paid
as required by any covenant or obligation  contained herein or in any other Loan
Document which is for the use,  forbearance or detention of such money),  exceed
that amount of money which would cause the effective  rate of interest to exceed
the Highest  Lawful  Rate,  and all amounts owed under this  Agreement  and each
other Loan Document  shall be held to be subject to reduction to the effect that
such amounts so paid or agreed to be paid which are for the use,  forbearance or
detention of money under this  Agreement or such Loan Document shall in no event
exceed that amount of money which would cause the effective  rate of interest to
exceed the Highest  Lawful  Rate.  To the extent  that the  Highest  Lawful Rate
applicable to a Bank is at any time  determined by Texas law, such rate shall be
the  "indicated  rate  ceiling"  described in Section  (a)(1) of Article 1.04 of

HOU04:43581.4







Chapter 1, Subtitle 1, Title 79, of the Revised Civil  Statutes of Texas,  1925,
as amended;  provided,  to the extent permitted by such Article,  the Banks from
time to time by notice  from the Agent to  Borrower  may  revise  the  aforesaid
election of such interest rate ceiling as such ceiling affects the  then-current
or future balances of the Loans outstanding under the Notes. Notwithstanding any
provision in this  Agreement or any other Loan Document to the contrary,  if the
maturity of the Notes or the  obligations in respect of the other Loan Documents
are  accelerated  for any reason,  or in the event of  prepayment  of all or any
portion of the Notes or the  obligations  in respect of the other Loan Documents
by the  Borrower or in any other  event,  earned  interest on the Loans and such
other  obligations of the Borrower may never exceed the maximum amount permitted
by applicable law, and any unearned  interest  otherwise payable under the Notes
or the  obligations  in respect of the other Loan Documents that is in excess of
the maximum amount permitted by applicable law shall be cancelled  automatically
as of the date of such  acceleration  or  prepayment or other such event and, if
theretofore  paid,  shall be credited on the  principal  of the Notes or, if the
principal  of the  Notes  has been  paid in  full,  held as  collateral  for any
contingent  or  unmatured  obligation  of the  Borrower,  or,  if  there  are no
contingent or unmatured  obligations of the Borrower then outstanding,  refunded
to the  Borrower.  In  determining  whether or not the interest paid or payable,
under any specific  contingency,  exceeds the Highest  Lawful Rate, the Borrower
and the  Banks  shall,  to the  maximum  extent  permitted  by  applicable  law,
amortize,  prorate, allocate and spread, in equal parts during the period of the
actual term of this Agreement, all interest at any time contracted for, charged,
received or reserved in connection with this Agreement.

                       Section  9.14.  Indemnification.  The Borrower  agrees to
indemnify,  defend and hold the Agent,  the Co-Agent and each member of the Bank
Group,  their  Affiliates  and their  officers,  employees,  agents,  directors,
shareholders and Affiliates (collectively,  "Indemnified Persons") harmless from
and against any and all loss, liability,  damage, judgment, claim, deficiency or
reasonable expense (including interest,  penalties,  reasonable  attorneys' fees
and amounts paid in settlement)  incurred by or asserted against any Indemnified
Person  arising  out of, in any way  connected  with,  or as a result of (i) the
execution and delivery of this  Agreement and the other  documents  contemplated
hereby,  the  performance by the parties  hereto and thereto of its  obligations
hereunder  and  thereunder  (including  but not  limited  to the  making  of the
Commitments  of each Bank) and  consummation  of the  transactions  contemplated
hereby and thereby,  (ii) the actual or proposed use of the Letters of Credit or
the  proceeds of the Loans,  (iii) any  violation  by the Borrower or any of its
Subsidiaries  of  any   Requirement  of  Law,   including  but  not  limited  to
Environmental  Laws,  (iv)  ownership  by the Bank Group of any real or personal
property following foreclosure under the Security Documents,  to the extent such
losses, liabilities,  damages, judgments, claims, deficiencies or expenses arise
out of or  result  from the  presence,  disposal  or  release  of any  hazardous
materials or solid waste in, on or under such property  during the period owned,
leased  or  operated  by the  Borrower  or any of its  Subsidiaries,  including,
without   limitation,   losses,   liabilities,   damages,   judgments,   claims,
deficiencies or expenses which are imposed under Environmental Laws upon Persons
by virtue of their  ownership,  (v) any member of the Bank Group being deemed an

HOU04:43581.4







operator of any such real or  personal  property  in  circumstances  in which no
member of the Bank Group is generally operating or generally  exercising control
over such property, to the extent such losses, liabilities,  damages, judgments,
claims,  deficiencies  or  expenses  arise out of or result  from any  hazardous
materials  or solid  waste  located  in, on or under such  property  or (vi) any
claim, litigation, investigation or proceeding relating to any of the foregoing,
whether or not any  Indemnified  Person is a party  thereto;  provided that such
indemnity shall not apply to any such losses,  claims,  damages,  liabilities or
related  expenses that are  determined by a court of competent  jurisdiction  by
final and  nonappealable  judgment to have resulted from the gross negligence or
willful misconduct of such Indemnified Person. WITHOUT LIMITING ANY PROVISION OF
THIS AGREEMENT OR ANY OF THE OTHER LOAN DOCUMENTS,  IT IS THE EXPRESS  INTENTION
OF THE  BORROWER  THAT EACH  INDEMNIFIED  PERSON SHALL BE  INDEMNIFIED  AND HELD
HARMLESS  AGAINST  ANY  AND  ALL  LOSSES,  LIABILITIES,   CLAIMS,  DEFICIENCIES,
JUDGMENTS OR REASONABLE  EXPENSES  ARISING OUT OF OR RESULTING FROM THE ORDINARY
NEGLIGENCE  (WHETHER  SOLE OR  CONTRIBUTORY)  OF SUCH  INDEMNIFIED  PERSON.  THE
OBLIGATIONS   OF  THE  BORROWER  UNDER  THIS  SECTION  9.14  SHALL  SURVIVE  THE
TERMINATION OF THIS AGREEMENT.

            Section  9.15.  Ratification  of Security  Documents.  The  Borrower
hereby ratifies, adopts and confirms the Liens granted by and under the Security
Documents  as  security  for  all  of  the  Obligations.  The  Borrower  further
acknowledges  and agrees that the term "Secured  Obligations"  as defined in the
Security  Agreement  shall  include,   without   limitation,   the  payment  and
performance of the Obligations as defined in this Agreement.

                       Section  9.16.  Confidentiality.  In the  event  that the
Borrower  provides to the Agent or the Banks  written  confidential  information
belonging to the Borrower,  if the Borrower shall denominate such information in
writing as  "confidential",  the Agent and the Banks shall  thereafter  maintain
such  information  in confidence  in  accordance  with the standards of care and
diligence that each utilizes in maintaining  its own  confidential  information.
This  obligation  of  confidence  shall  not  apply  to  such  portions  of  the
information  which (i) are in the public domain,  (ii) hereafter  become part of
the public domain without the Agent or the Banks breaching  their  obligation of
confidence to the Borrower, (iii) are previously known by the Agent or the Banks
from some source  other than the  Borrower,  (iv) are  hereafter  obtained by or
available to the Agent or the Banks from a third party who owes no obligation of
confidence to the Borrower with respect to such information or through any other
means other than through disclosure by the Borrower, (vi) are disclosed with the
Borrower's consent,  (vii) must be disclosed either pursuant to any Requirements
of Law or to Persons  regulating  the  activities of the Agent or the Banks,  or
(viii) as may be  required  by law or  regulation  or order of any  Governmental
Authority in any judicial, arbitration or governmental proceeding.  Further, the
Agent or a Bank may  disclose  any  such  information  to any  other  Bank,  any
independent petroleum engineers or consultants, any independent certified public

HOU04:43581.4







accountants,  any legal counsel  employed by such Person in connection with this
Agreement  or  any  Security  Document,   including  without   limitation,   the
enforcement or exercise of all rights and remedies  thereunder,  or any assignee
or participant  (including prospective assignees and participants) in the Loans;
provided,  however,  that the Agent or Bank  imposes  on the Person to whom such
information is disclosed the same obligation to maintain the  confidentiality of
such  information as is imposed upon it hereunder.  Notwithstanding  anything to
the contrary  provided  herein,  this obligation of confidence shall cease three
(3) years from the date the  information  was  furnished,  unless  the  Borrower
requests in writing at least  thirty (30) days prior to the  expiration  of such
three year period,  to maintain the  confidentiality  of such information for an
additional  three year period.  The Borrower  waives any and all other rights it
may have to  confidentiality  as  against  the Agent and the  Banks  arising  by
contract,  agreement,  statute or law except as expressly stated in this Section
9.16.

                       Section  9.17.  Final  Agreement  of  the  Parties.  THIS
AGREEMENT AND THE OTHER LOAN DOCUMENTS REPRESENT THE FINAL AGREEMENT BETWEEN THE
PARTIES AND MAY NOT BE  CONTRADICTED  BY EVIDENCE OF PRIOR,  CONTEMPORANEOUS  OR
SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.  THERE ARE NO ORAL AGREEMENTS BETWEEN
THE PARTIES.

HOU04:43581.4







            IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be executed by its officers thereunto duly authorized as of the date first above
written.

                                      ABRAXAS PETROLEUM
                                      CORPORATION


                                       By:
                                            Robert L. G. Watson
                                            Chief Executive Officer


                                       BANKERS TRUST COMPANY, as
                                       Agent and as Issuing Bank


                                       By:
                                            Mary Jo Jolly
                                            Assistant Vice President



                                      ING (U.S.) CAPITAL
                                      CORPORATION, as
                                         Co-Agent


                                       By:
                                            Christopher R. Wagner
                                            Vice President

HOU04:43581.4







                                       Bank:

Commitment: $15,000,000.00             BANKERS TRUST COMPANY



                                       By:

                                            Mary Jo Jolly
                                            Assistant Vice President

                                       Address:

                                       130 Liberty Street, 14th Floor
                                       New York, New York 10006

                                       Telecopy No.: (212) 250-6029

                                            Domestic Lending Office

                                       Bankers Trust Company
                                       130 Liberty Street, 14th Floor
                                       New York, New York 10006

                                       Eurodollar Lending Office

                                       Bankers Trust Company
                                       130 Liberty Street, 14th Floor
                                       New York, New York 10006


HOU04:43581.4







                                       Bank:

Commitment: $15,000,000.00             ING (U.S.) CAPITAL
                                       CORPORATION


                                       By:
                                          Christopher R. Wagner
                                          Vice President

                                       Address:

                                       135 East 57th Street
                                       8th Floor
                                       New York, New York 10022

                                       Telecopy No.: (212) 832-3616
                                       Domestic Lending Office

                                       135 East 57th Street
                                       8th Floor
                                       New York, New York 10022

                                       Telecopy No.: (212) 832-3616

                                       Eurodollar Lending Office

                                       135 East 57th Street
                                       8th Floor
                                       New York, New York 10022

                                       Telecopy No.: (212) 832-3616

HOU04:43581.4






                                       Bank:

Commitment: $10,000,000.00             UNION BANK OF CALIFORNIA,
                                       N.A.



                                       By:
                                       Name:
                                       Title:


                                       By:
                                       Name:
                                       Title:

                                       Address:

                                       Union Bank of California, N.A.
                                       500 North Akard, Suite 4200
                                       Dallas, Texas 75201

                                       Telecopy No.: (214) 922-4209
                                       Domestic Lending Office

                                       Union Bank of California, N.A.
                                       445 South Figueroa Street
                                       Los Angeles, California 90071

                                       Eurodollar Lending Office

                                       Union Bank of California, N.A.
                                       445 South Figueroa Street
                                       Los Angeles, California 90071


HOU04:43581.4