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                                POGO PRODUCING COMPANY


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


                                   First Amendment

                            Dated as of December 21, 1998

                                          to

                        Amended and Restated Credit Agreement

                              Dated as of August 1, 1997


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               FIRST AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT

     THIS FIRST AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT, dated as 
of December 21, 1998 (the "AMENDMENT"), between Pogo Producing Company, a 
Delaware corporation (the "BORROWER"), the various financial institutions 
which are or may become parties to the Credit Agreement, as amended hereby 
(collectively, the "LENDERS"), Bank of Montreal, acting through its Chicago, 
Illinois branch, (the "BANK"), as administrative agent (the "AGENT") for the 
Lenders, and Paribas, formerly known as Banque Paribas, as documentation 
agent (the "CO-AGENT", and together with the Agent, the "AGENTS"), for the 
Lenders,

                                 W I T N E S S E T H

     WHEREAS the Borrower, the Lenders, the Agent and the Co-Agent are 
parties to a certain Amended and Restated Credit Agreement, dated as of 
August 1, 1997, as previously amended (the "CREDIT AGREEMENT"); and 

     WHEREAS the Borrower desires to amend certain provisions of the Credit 
Agreement;

     NOW, THEREFORE, the parties hereto hereby agree as follows:

     1.   DEFINITIONS.  Unless otherwise defined herein or the context 
otherwise requires, or except as the definition may be amended by this 
Amendment, terms used in this Amendment, including its preamble and recitals, 
shall have the meanings provided in the Credit Agreement, as hereby amended.

     2.   AMENDMENTS TO CREDIT AGREEMENT.

     (a)  The PREAMBLE to the Credit Agreement is amended hereby in its 
entirety to the following:

     "    THIS AMENDED AND RESTATED CREDIT AGREEMENT, dated as of August 1, 
     1997, among POGO PRODUCING COMPANY, a Delaware corporation (the 
     "BORROWER"), the various financial institutions which are or may become 
     parties hereto (collectively, the "LENDERS"), and BANK OF MONTREAL, 
     acting through its Chicago, Illinois branch ("the BANK"), as 
     administrative agent (the "AGENT") for the Lenders and PARIBAS, formerly 
     known as Banque Paribas, as documentation agent (the "CO-AGENT") for the 
     Lenders,".

     (b)  The definitions of "Alternate Thailand Reserve Report", "Alternate 
U.S Reserve Report", "Applicable Margin", "Borrowing Base", "Deficiency 
Period", "Loan Documents", "Non-Standard Determination", "Revolving Loan 
Commitment Amount", "Subordinated Indebtedness" and "U.S. Reserve Report" 
appearing in SECTION 1.1 of the Credit Agreement are amended hereby in their 
entirety to the following:



     "    "ALTERNATE THAILAND RESERVE REPORT" means a report, in form and 
     detail satisfactory to the Agent and the Required Lenders, on reserves 
     updated internally by the Borrower making adjustments for any changes in 
     production volumes, expenses, Applicable Prices and for dispositions of 
     properties in the six-month period subsequent to the immediately 
     preceding Reserve Report Date and based upon the immediately preceding 
     Thailand Reserve Report and, at the Borrower's option, for any 
     acquisitions of properties not included in the immediately preceding 
     Thailand Reserve Report or the restoration to the Borrowing Base of 
     properties previously removed from the Borrowing Base by the Borrower."

     "    "ALTERNATE U.S. RESERVE REPORT" means a report, in form and detail 
     satisfactory to the Agent and the Required Lenders, on reserves updated 
     internally by the Borrower making adjustments for any changes in 
     production volumes, expenses, Applicable Prices and for dispositions of 
     properties in the six-month period subsequent to the immediately 
     preceding Reserve Report Date and based upon the immediately preceding 
     U.S. Reserve Report and, at the Borrower's option, for any acquisitions 
     of properties not included in the immediately preceding U.S. Reserve 
     Report or the restoration to the Borrowing Base of properties previously 
     removed from the Borrowing Base by the Borrower."

     "    "APPLICABLE MARGIN" means:

          (a)  for any time prior to or on the Revolving Loan Commitment 
     Termination Date, (i) with respect to any Prime Rate Loan, LIBO Rate 
     Loan or the Commitment Fees payable hereunder with respect to Tranche A, 
     as the case may be, the applicable percentage per annum set forth below 
     under the caption "Prime Spread", "LIBO Spread" or "Unused Fee", as the 
     case may be, determined by reference to the percentage of the Borrowing 
     Base that the outstanding Loans represent at that time:



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   BORROWING BASE USAGE          PRIME SPREAD   LIBO SPREAD   UNUSED FEE
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 75% of the Borrowing Base         0.25%          2.00%         0.375%
 LESS THAN outstanding Loans
 LESS THAN OR EQUAL TO 100%
 of the Borrowing Base
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 60% of the Borrowing Base         0.00%           1.75%        0.375%
 LESS THAN outstanding Loans
 LESS THAN OR EQUAL TO 75%
 of the Borrowing Base
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 40% of the Borrowing Base         0.00%           1.50%        0.250%
 LESS THAN outstanding Loans
 LESS THAN OR EQUAL TO 60%
 of the Borrowing Base
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                                      2




                                                     
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 Outstanding Loans LESS THAN       0.00%           1.25%        0.250%
 OR EQUAL TO 40% of the
 Borrowing Base
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     PROVIDED, HOWEVER, that during any Deficiency Period, then the "Prime 
     Spread" with respect to Prime Rate Loans under Tranche A shall be 
     "0.25%" per annum and the "LIBO Spread" with respect to LIBO Rate Loans 
     under Tranche A shall be "2.50%" per annum, and (ii) with respect to any 
     Prime Rate Loan or LIBO Rate Loan with respect to Tranche B, as the case 
     may be, the "Prime Spread" shall be "0.75%" per annum and the "LIBO 
     Spread" shall be "2.50%" per annum, PROVIDED, HOWEVER, that, 
     notwithstanding the foregoing, if all outstanding amounts under Tranche 
     B have not been repaid in full prior to February 28, 1999, then the 
     "Prime Spread" with respect to Prime Rate Loans under Tranche A and 
     Tranche B shall be "0.75%" per annum and the "LIBO Spread" with respect 
     to LIBO Rate Loans under Tranche A and Tranche B shall be "2.50%" per 
     annum; and

          (b)  for any time after the Revolving Loan Commitment Termination 
     Date, with respect to any Prime Rate Loan or LIBO Rate Loan, as the case 
     may be, the "Prime Spread" shall be "0.25%" per annum and the "LIBO 
     Spread" shall be "2.00%" per annum."

     "    "BORROWING BASE" means, at any time, that amount, determined in 
     accordance with SECTION 2.6 and calculated using the Lenders' usual and 
     customary criteria for oil and gas reserve evaluation.  During the 
     period from December 21, 1998, to the date of the next determination of 
     the Borrowing Base pursuant to the provisions of SECTION 2.6, the amount 
     of the Borrowing Base shall be Two Hundred Million Dollars 
     ($200,000,000); PROVIDED, HOWEVER, that in the event that New 
     Subordinated Debt is issued prior to April 30, 1999, then such Borrowing 
     Base shall be reduced by 40% of the principal amount of such New 
     Subordinated Debt."

     "    "DEFICIENCY PERIOD" means any period commencing upon any date that 
     the Agent determines that the aggregate principal amount of all Senior 
     Debt exceeds the Senior Debt Capacity then in effect, and continuing 
     until the date that, pursuant to the redetermination of the Borrowing 
     Base, or by reason of mandatory prepayments or scheduled repayments, 
     with respect to Loans, the aggregate outstanding principal amount of 
     Senior Debt no longer exceeds the Senior Debt Capacity."

     "    "LOAN DOCUMENT" means this Agreement, the Notes, any Subsidiary 
      Guaranty and any Security Documents."

     "    "NON-STANDARD DETERMINATION" means a determination or 
     redetermination of the Borrowing Base that may be made either (i) at the 
     discretion of the Required Borrowing Base Lenders, no more than once 
     during any six month period ending either October 31st, or April 30th, 
     as applicable, or (ii) at the request of the


                                      3


     Borrower, no more than once during any six month period ending either 
     October 31st, or April 30th, as applicable, in either case as provided 
     in SECTION 2.6(b)."

     "    "REVOLVING LOAN COMMITMENT AMOUNT" means, on any date, 
     $250,000,000, as such Revolving Loan Commitment Amount may be changed 
     from time to time pursuant to SECTION 2.2."

     "    "SUBORDINATED INDEBTEDNESS" means (i) the five and one half percent 
     (5 1/2%) Convertible Subordinated Notes due 2006 issued by the Borrower 
     pursuant to the Indenture dated as of June 15, 1996 between the Borrower 
     and State Street Bank and Trust Company, as Trustee, (ii) the eight and 
     three quarters percent (8 3/4%) Senior Subordinated Notes due 2007 
     issued by the Borrower pursuant to the Indenture dated as of May 15, 
     1997 between the Borrower and State Street Bank and Trust Company, as 
     Trustee, (iii) the New Subordinated Debt, and (iv) new Indebtedness 
     incurred, PROVIDED that:

               (a)  such new Indebtedness has subordination terms not 
          materially less favorable to the holders of the Notes than the then 
          existing Subordinated Indebtedness unless such terms are approved 
          by the Required Lenders;

               (b)  the aggregate principal payments for such new 
          Indebtedness scheduled to be paid (i) in any Fiscal Year ending 
          prior to the Stated Maturity Date for the Term Loans are no greater 
          than the aggregate principal payments under the existing schedule 
          of principal payments of the Subordinated Indebtedness being repaid 
          and (ii) prior to a period ending thirty-six (36) months after the 
          Stated Maturity Date for the Term Loans shall not exceed the 
          aggregate principal payments under the existing schedule of 
          principal payments of the Subordinated Indebtedness being repaid;

               (c)  the maturity dates thereof are no earlier than thirty-six 
          (36) months after the Stated Maturity Date of the Term Loans; and

               (d)  other than with respect to issuance of the New 
          Subordinated Debt on or before February 28, 1999, the Required 
          Borrowing Base Lenders shall have the option for a period of 30 
          days after the issuance of Subordinated Indebtedness to adjust the 
          Borrowing Base in effect at the time of the issuance of such 
          Subordinated Indebtedness."

     "    "U.S. RESERVE REPORT" means a report of Ryder Scott Company 
     Petroleum Engineers or other independent petroleum engineers 
     satisfactory to the Agent and the Required Lenders showing, in form and 
     detail satisfactory to the Agent and Required Lenders, such engineers' 
     estimate of the Proved Reserves on the Borrowing Base Properties located 
     in the United States or Canada and the future Gross Revenue and


                                      4


     Future Net Income to be derived from such Proved Reserves as of the 
     Reserve Report Date for each year.  The Reserve Report shall estimate 
     the Proved Reserves and income data for the Proved Developed Producing 
     Reserves, the Proved Developed Shut-In Reserves, the Proved Developed 
     Behind Pipe Reserves and the Proved Undeveloped Reserves, and shall, in 
     each case, report only the Proved Reserves and income data attributable 
     to Borrower's working interest percentage in or Borrower's pro rata 
     share of, as the case may be, any Proved Reserves located on the 
     Borrowing Base Properties located in the United States, less the 
     Borrower's obligations or pro rata share of such obligations, as the 
     case may be, for advance payments for each such property.  All 
     calculations including the calculation of Applicable Prices in the 
     Reserve Report shall be made on a property-by-property and an 
     interest-by-interest basis in order to reflect the varying royalties, 
     costs and expenses, working interests and advance payments applicable to 
     the various Borrowing Base Properties covered by the Reserve Report.  
     Except as otherwise specifically required herein, the Reserve Report 
     shall be prepared and presented in accordance with the requirements of 
     the S.E.C. from time to time in effect."

     (c)  SECTION 1.1 of the Credit Agreement is amended hereby by adding the 
following definitions of "Arch Subsidiaries", "Collateral", "Collateral 
Agent", "New Subordinated Capital", "New Subordinated Debt", "Required 
Borrowing Base Lenders", "Security Documents", "Senior Debt Capacity", 
"Tranche A" and "Tranche B" in appropriate alphabetical order:

     "    "ARCH SUBSIDIARIES" means Arch Petroleum, Inc., a Delaware 
     corporation and its Subsidiaries."

     "    "COLLATERAL" is defined in SECTION 7.11."

     "    "COLLATERAL AGENT" means BMO Financial, Inc., its successor or such 
     Person as may be designated pursuant to SECTION 11.14."

     "    "NEW SUBORDINATED CAPITAL" means the New Subordinated Debt, 
     convertible preferred, preferred, common stock or any combination 
     thereof issued by the Borrower in an aggregate principal amount of at 
     least $125,000,000."

     "    "NEW SUBORDINATED DEBT" means up to $150,000,000 of subordinated 
     Indebtedness which (i) complies with the requirements for new 
     subordinated Indebtedness incurred contained in the definition of 
     Subordinated Indebtedness and (ii) is issued on or before April 30, 
     1999."

     "    "REQUIRED BORROWING BASE LENDERS" means (a) with respect to any 
     increase in the Borrowing Base, the Agent and Lenders holding at least 
     100% of the then aggregate outstanding principal amount of the Notes 
     then held by the Lenders, or, if no such principal amount is then 
     outstanding, the Agent and Lenders responsible for


                                      5


     at least 100% of the then current Commitment Amount, and (b) with 
     respect to any action other than an increase in the Borrowing Base, the 
     Agent and Lenders holding at least 66 2/3% of the then aggregate 
     outstanding principal amount of the Notes then held by the Lenders, or, 
     if no such principal amount is then outstanding, the Agent and Lenders 
     responsible for at least 66 2/3% of the then current Commitment Amount."

     "    "SECURITY DOCUMENTS" means, collectively, the Mortgage, Deed of 
     Trust, Assignment, Security Agreement and Financing Statement from the 
     Borrower or any of its Subsidiaries as the case may be, substantially in 
     the form attached hereto as EXHIBIT G (with any modifications necessary 
     to comply with applicable state laws or filing requirements), and any 
     and all further documents, financing statements, agreements and 
     instruments which may be required under applicable law, or which the 
     Agent may reasonably request, in order to satisfy the requirements of 
     SECTION 7.11."

     "    "SENIOR DEBT CAPACITY" means the sum of (i) the Borrowing Base then 
     in effect PLUS (ii) when available, Tranche B."

     "    "TRANCHE A" means that portion of the Commitment Amount equal to 
     the then effective Borrowing Base."

     "    "TRANCHE B" means (a) until April 30, 1999, a portion of the 
     Commitment Amount equal to the greater of (i) $0 or (ii) the sum of 
     Fifty Million Dollars ($50,000,000) LESS the proceeds from the issuance 
     of New Subordinated Capital not allocated (as set forth in the 
     definition of "Borrowing Base") to the reduction of the Borrowing Base, 
     and (b) at all times after the date of the next scheduled determination 
     of the Borrowing Base pursuant to the provisions of SECTION 2.6(a), $0."

     (d)  SECTION 1.1 of the Credit Agreement is amended hereby by deleting 
the definitions of "Activation Amount", "Active Revolving Loan Commitment 
Amount", "Applicable Percentage", "Audited Reserve Report", "Implied Senior 
Debt Rating", "Inactive Revolving Loan Commitment Amount", "Majority 
Borrowing Base Lenders", "New Subordinated Indebtedness", "Revised Borrowing 
Base", "Thailand Borrowing Base", "Updated Reserve Report" and "U.S. 
Borrowing Base".

     (e)  The definition of "Borrowing Base Properties" appearing in SECTION 
1.1 of the Credit Agreement is amended hereby (i) by inserting the phrase "or 
Canada" following in the phrase "properties located outside the United 
States", and (ii) by inserting the phrase "and properties owned by the Arch 
Subsidiaries" following in the phrase "other than Qualified Partnership 
Properties".

     (f)  SECTION 2.1.1 of the Credit Agreement is amended hereby in its 
entirety to the following:


                                      6


     "    SECTION 2.1.1  REVOLVING LOAN COMMITMENT.  From time to time on any 
     Business Day occurring prior to the Revolving Loan Commitment 
     Termination Date, each Lender will make revolving loans (relative to 
     such Lender, its "REVOLVING LOAN") to the Borrower equal to such 
     Lender's Percentage of the aggregate amount of the Borrowing requested 
     by the Borrower to be made on such day.  The Commitment of each Lender 
     described in this SECTION 2.1.1 is herein referred to as its "REVOLVING 
     LOAN COMMITMENT".  On the terms and subject to the conditions hereof, 
     the Borrower may from time to time borrow, prepay and reborrow Revolving 
     Loans attributable to Tranche A.  On the terms and subject to the 
     conditions hereof, the Borrower may borrow on December 21, 1998 the 
     Revolving Loans attributable to Tranche B, may from time to time prepay 
     such Revolving Loans attributable to Tranche B and such amounts may not 
     be reborrowed."

     (g)  SUBSECTION 2.1.3(a) and SUBSECTION 2.1.3(b) of the Credit Agreement 
are amended hereby in their entirety to the following:

     "    (a)  in the case of Revolving Loans, the aggregate outstanding 
     principal amount of all Revolving Loans outstanding would exceed the 
     lesser of (i) the Revolving Loan Commitment Amount and (ii) the Senior 
     Debt Capacity then in effect minus all other Senior Debt outstanding;

          (b)  in the case of Term Loans, the aggregate original principal 
     amount of all Term Loans would exceed the lesser of (i) the Term Loan 
     Commitment Amount and (ii) the Senior Debt Capacity then in effect minus 
     all other Senior Debt outstanding;".

     (h)  SECTION 2.2.1 of the Credit Agreement is amended hereby in its 
entirety to the following:

     "    SECTION 2.2.1  OPTIONAL.  The Borrower may, from time to time on 
     any Business Day occurring after the time of the initial Borrowing 
     hereunder, voluntarily reduce the amount of any Commitment Amount; 
     PROVIDED, HOWEVER, that all such reductions shall require at least three 
     Business Days' prior notice to the Agent, and such reduction of the 
     Commitment Amount shall be in a minimum amount of $5,000,000 and in 
     increments of $1,000,000."

     (i)  SECTION 2.2.2 of the Credit Agreement is amended hereby by deleting 
SUBSECTION (c) thereof in its entirety.

     (j)  SECTION 2.6 of the Credit Agreement is amended hereby in its 
entirety to the following:


                                      7


     "    SECTION 2.6 DETERMINATION OF BORROWING BASE.  Upon delivery of a 
     Reserve Report or Alternate Reserve Report pursuant to SECTION 7.2 
     hereof and PROVIDED, that such delivery shall be on or before the dates 
     required therein, then:

               (a)  With respect to the annual or semi-annual, as the case 
          may be, determination of the Borrowing Base, the Agent will propose 
          to the Lenders a Borrowing Base for acceptance by the Required 
          Borrowing Base Lenders.  If such Borrowing Base, as proposed by the 
          Agent is accepted by the Required Borrowing Base Lenders, then such 
          agreed Borrowing Base shall be communicated by the Agent to the 
          Borrower on or before (i) the next April 30th, in the case of a 
          Reserve Report and (ii) the next October 31st, in the case of an 
          Alternate Reserve Report, and shall remain in effect until the next 
          October 31st or April 30th; PROVIDED THAT if such proposed 
          Borrowing Base is not approved by the Required Borrowing Base 
          Lenders prior to the applicable date then, within thirty (30) days 
          following the applicable date, the Required Borrowing Base Lenders 
          will establish and agree to a Borrowing Base, and such amount will 
          be promptly communicated to the Borrower; PROVIDED THAT the then 
          current Borrowing Base shall remain in effect until the Borrower is 
          notified of the new Borrowing Base.  The new Borrowing Base shall 
          become effective as of the date that the Borrower receives 
          notification from the Agent of the new Borrowing Base.  The 
          Borrowing Base, as determined and established pursuant to this 
          SECTION 2.6(a) shall be subject, at all times after April 30, 1999, 
          to the redetermination of the then effective Borrowing Base as a 
          result of a Non-Standard Determination.

               (b)  With respect to a redetermination of the Borrowing Base 
          resulting from a Non-Standard Determination, the Agent or the 
          Required Lenders and the Borrower shall have the right, but not the 
          obligation on no more than one occasion during each six month 
          period ending on April 30th and October 31st, to notify the 
          Borrower or the Agent, respectively, of its intent to perform a 
          Non-Standard Determination of the Borrowing Base.  In connection 
          with the Non-Standard Determination and notwithstanding the 
          delivery of any new Alternate Reserve Report, the Agent shall 
          propose, and the Required Borrowing Base Lenders shall agree to and 
          approve, a new Borrowing Base which shall become effective upon 
          receipt by the Borrower of notice of such new Borrowing Base until 
          such new Borrowing Base may be redetermined as a result of a 
          scheduled semi-annual determination of the Borrowing Base pursuant 
          to SECTION 2.6(a).  In connection with any Non-Standard 
          Determination, the Borrower shall deliver promptly upon the request 
          of the Agent a new Alternate Reserve Report to the Agent."

     (k)  SECTION 3.1 of the Credit Agreement is amended hereby by inserting 
the following SECTION 3.1.5 following SECTION 3.1.4 thereof:


                                      8


     "    SECTION 3.1.5  REPAYMENT OF TRANCHE B.  The Borrower shall 
     immediately repay all Loans outstanding under Tranche B on April 30, 
     1999; PROVIDED, HOWEVER, that in the event of any issuance of New 
     Subordinated Capital prior to April 30, 1999, the Borrower shall within 
     seven (7) days of such issuance repay Loans outstanding under Tranche B 
     in an amount equal to the proceeds from the issuance of such New 
     Subordinated Capital which were not allocated (as set forth in the 
     definition of "Borrowing Base") to the reduction of the Borrowing Base."

     (l)  SECTION 3.1.2 of the Credit Agreement is amended hereby in its 
entirety to the following:

     "    SECTION 3.1.2  MANDATORY PREPAYMENTS ON REVOLVING LOANS.  If at any 
     time prior to the Revolving Loan Commitment Termination Date, the 
     aggregate principal amount of all Senior Debt outstanding shall exceed 
     the Senior Debt Capacity then in effect, the Borrower shall forthwith 
     repay the Revolving Loans in an aggregate amount equal to such excess; 
     PROVIDED that with respect to prepayment of amounts outstanding under 
     Tranche A, Borrower shall have the option to prepay such Revolving Loans 
     under Tranche A, in no more than five substantially equal monthly 
     installments, in an amount such that upon the conclusion of such 
     mandatory prepayments, the aggregate principal amount of all outstanding 
     Senior Debt will not exceed the Senior Debt Capacity.  If the aggregate 
     principal amount of all Senior Debt outstanding exceeds the Senior Debt 
     Capacity at any time, the first such payment pursuant to the proviso in 
     the preceding sentence shall be due within 90 days after the 
     commencement date of a Deficiency Period, and the remaining payments 
     shall be due on the numerically corresponding day of each of the 
     subsequent months.  If a subsequent month does not contain a numerically 
     corresponding day, the Borrower shall make such payment on the last 
     Business Day of such month, or if the numerically corresponding day is 
     not a Business Day, such payment will be due on the preceding Business 
     Day."

     (m)  SECTION 3.1.3 of the Credit Agreement is amended hereby in its 
entirety to the following:

     "    SECTION 3.1.3  MANDATORY PREPAYMENTS ON TERM LOANS.  If at any time 
     after the making of the Term Loans, the aggregate principal amount of 
     all Senior Debt outstanding shall exceed the Borrowing Base then in 
     effect, the Borrower shall, at the Borrower's option, either (i) 
     forthwith repay the Term Loans in an aggregate amount equal to such 
     excess or (ii) prepay the Term Loans, in no more than five substantially 
     equal monthly installments, in an amount such that upon the conclusion 
     of such mandatory prepayments, the aggregate principal amount of all 
     outstanding Senior Debt will not exceed the Borrowing Base.  If the 
     aggregate principal amount of all Senior Debt outstanding exceeds the 
     Borrowing Base at any time, the first such payment pursuant to CLAUSE 
     (ii) above shall be due within 90 days after the


                                      9


     commencement date of a Deficiency Period, and the remaining payments 
     shall be due on the numerically corresponding day of each of the 
     subsequent months.  If a subsequent month does not contain a numerically 
     corresponding day, the Borrower shall make such payment on the last 
     Business Day of such month, or if the numerically corresponding day is 
     not a Business Day, such payment will be due on the preceding Business 
     Day.  Mandatory prepayments pursuant to this SECTION 3.1.3 shall be in 
     addition to and not in lieu of payments required pursuant to SECTION 
     3.1.1.  Mandatory prepayments pursuant to this SECTION 3.1.3 shall be 
     applied to the next scheduled repayment or repayments required pursuant 
     to SECTION 3.1.1 if, as of such repayment date, after giving effect to 
     such scheduled repayment, the aggregate principal amount of all Senior 
     Debt outstanding does not exceed the Borrowing Base then in effect, 
     however, the repayments pursuant to SECTION 3.1.1 shall always be 
     required."

     (n)  SECTION 3.3.1 of the Credit Agreement is amended hereby in its 
entirety to the following:

     "    SECTION 3.3.1  RATES.  Pursuant to an appropriately delivered 
     Borrowing Request or Continuation/Conversion Notice, the Borrower may 
     elect that Loans comprising a Borrowing accrue interest at a rate per 
     annum:

               (1)  on that portion maintained from time to time as a Prime 
          Rate Loan with respect to Tranche A, equal to the sum of the Prime 
          Rate from time to time in effect PLUS the Applicable Margin 
          applicable to Tranche A from time to time in effect;

               (2)  on that portion maintained from time to time as a Prime 
          Rate Loan with respect to Tranche B, equal to the sum of the Prime 
          Rate from time to time in effect PLUS the Applicable Margin 
          applicable to Tranche B from time to time in effect;

               (3)  on that portion maintained as a LIBO Rate Loan with 
          respect to Tranche A, during each Interest Period applicable 
          thereto, equal to the sum of the LIBO Rate for such Interest Period 
          PLUS the Applicable Margin applicable to Tranche A; and

               (4)  on that portion maintained as a LIBO Rate Loan with 
          respect to Tranche B, during each Interest Period applicable 
          thereto, equal to the sum of the LIBO Rate for such Interest Period 
          PLUS the Applicable Margin applicable to Tranche B.

     The LIBO Rate for any Interest Period for LIBO Rate Loans will be 
     determined by the Agent on the basis of the applicable rates furnished 
     to and received by the Agent from the Reference Banks, two Business Days 
     before the first day of such Interest


                                      10


     Period.  All Fixed Rate Loans shall bear interest from and including the 
     first day of the applicable Interest Period to (but not including) the 
     last day of such Interest Period at the interest rate determined as 
     applicable to such Fixed Rate Loan."

     (o)  SECTION 3.4.1 of the Credit Agreement is amended hereby in its 
entirety to the following:

     "    SECTION 3.4.1  COMMITMENT FEE.  The Borrower agrees to pay to the 
     Agent for the account of each Lender, for the period (including any 
     portion thereof when any of Commitments are suspended by reason of the 
     Borrower's inability to satisfy any condition of ARTICLE V) commencing 
     on the Effective Date and continuing through the Revolving Loan 
     Commitment Termination Date, commitment fees (collectively, the 
     "COMMITMENT FEES") at a rate per annum for each day of such period equal 
     to the percentage set forth under the "Unused Fee" column of the 
     Applicable Margin times such Lender's respective Percentage of the sum 
     of the average daily unused portion of Tranche A.  Fees payable pursuant 
     to this SECTION 3.4.1 shall be payable by the Borrower in arrears on 
     each Quarterly Payment Date, commencing with the first such day 
     following the Effective Date, and on the Revolving Loan Commitment 
     Termination Date."

     (p)  SUBSECTION 5.2.1(d) of the Credit Agreement is amended hereby in 
its entirety to the following:

     "    (d)  the Senior Debt outstanding does not exceed the Senior Debt 
     Capacity and the Borrower is in compliance with the Current Ratio and 
     Fixed Charge Coverage Ratio as required by SECTIONS 8.4(c) and 8.4(d), 
     respectively, and, immediately after giving effect to the proposed 
     Borrowing, Senior Debt shall not exceed the Senior Debt Capacity then in 
     effect and the Indebtedness of the Borrower shall not exceed the amount 
     permitted under CLAUSE (a) of SECTION 8.4."

     (q)  SUBSECTION 6.2(c) of the Credit Agreement is amended hereby in its 
entirety to the following:

     "    (c)  result in, or require the creation or imposition of, any Lien 
     on any properties of the Borrower or its Subsidiaries except as Liens 
     will be imposed, created, or required upon execution and delivery of the 
     Security Documents pursuant to SECTION 7.11."

     (r)  ARTICLE VI of the Credit Agreement is amended hereby by inserting 
the following SECTION 6.18 following SECTION 6.17 thereof:

     "    SECTION 6.18  YEAR 2000 MATTERS.  Any reprogramming required to 
     permit the proper functioning in all respects (but only to the extent 
     that such proper


                                      11


     functioning would otherwise be impaired by the occurrence of the year 
     2000) in and following the year 2000, of material computer systems and 
     other material equipment containing embedded microchips, in either case 
     owned or operated by Borrower or any Subsidiary, and the testing of all 
     such systems and other equipment as so reprogrammed, will be completed 
     by December 31, 1999. Prior to December 31, 1999, the Borrower shall 
     have made reasonable inquiry of parties whose operations are material to 
     the Borrower's and its Subsidiaries' business, taken as a whole, and who 
     have computer systems and other equipment containing embedded 
     microchips, as to such parties' preparedness for any impairments to such 
     systems resulting from the occurrence of the year 2000.  The costs to 
     the Borrower and its Subsidiaries that have not been incurred as of the 
     date hereof for such reprogramming and testing and for the other 
     reasonably foreseeable consequences to them of any improper functioning 
     of other computer systems and equipment containing embedded microchips 
     owned or operated by Borrower or any Subsidiary due to the occurrence of 
     the year 2000 could not reasonably be expected to result in a Default or 
     Event of Default."

     (s)  SUBSECTION 7.2(c)(i)(B) of the Credit Agreement is amended hereby 
in its entirety to the following:

     "(B) the Borrower has fulfilled all its obligations under this 
     Agreement, the Notes and the other Loan Documents".

     (t)  SUBSECTION 7.2(e) of the Credit Agreement is amended hereby in its 
entirety to the following:

     "    (e)  (i) as soon as available, but in no event later than 90 days 
     after the close of each Fiscal Year of the Borrower, commencing with the 
     Fiscal Year ended December 31, 1998, Reserve Reports prepared by Ryder 
     Scott Company Petroleum Engineers or another independent engineering 
     firm acceptable to the Agent and the Required Lenders as of January 1 of 
     the next succeeding year, and (ii) as soon as available, but in no event 
     later than 45 days after each June 30, commencing June 30, 1999, 
     Alternate Reserve Reports dated as of July 1;".

     (u)  SUBSECTION 7.2(m) of the Credit Agreement is amended hereby in its 
entirety to the following:

     "    (m)  as soon as reasonably possible and in any event within ten 
     (10) Business Days if the principal of the Senior Debt outstanding 
     (including the Loans) shall exceed the Senior Debt Capacity then in 
     effect, notice of such excess."

     (v)  ARTICLE VII of the Credit Agreement is amended hereby by inserting 
the following SECTION 7.11 following SECTION 7.10 thereof:


                                      12


     "    SECTION 7.11  SECURITY DOCUMENTS.  If the Borrower fails to issue 
     the New Subordinated Capital prior to February 28, 1999, then, without 
     affecting in any way any other rights of the Lenders hereunder, the 
     Borrower shall:

                    (i)  duly execute and deliver to the Collateral Agent and 
          cause each such Security Document to be filed, registered and 
          recorded, as the law may require or the Agent may request, in each 
          jurisdiction where so required or requested, and deliver to the 
          Collateral Agent an acknowledgment copy, or other evidence 
          satisfactory to it, of each such filing, registration and 
          recordation, in order to mortgage, assign, grant a security 
          interest in and pledge to the Collateral Agent, acting on behalf of 
          the Lenders, right, title and interest (and, with respect to any 
          Qualified Partnership Properties, the Borrower's PRO RATA share of 
          the right, title and interest of any partnership Subsidiary) in and 
          to the Borrowing Base Properties located in the United States, and 
          the proceeds thereof, having a Discounted Present Value, as of the 
          date of the most recent Reserve Report, of 80% of the Discounted 
          Present Value of such Borrowing Base Properties (the "COLLATERAL") 
          in such request, and to perfect and evidence the first priority of 
          all such Security Documents (subject to liens and encumbrances 
          permitted by the terms of such instruments); PROVIDED that the 
          Borrower shall not, and shall not permit any of its Subsidiaries 
          to, on or after the Effective Date enter into any amendment of any 
          such contract or agreement, or enter into any other contract or 
          agreement, that in either case would result in any additional such 
          material consent, authorization or approval requirement; and

                    (ii) deliver to the Agent, prior to March 31, 1999, 
          evidence acceptable to the Agent, in its reasonable discretion, 
          indicating that a Security Document covering 80% of the Discounted 
          Present Value of the Borrowing Base Properties located in the 
          United States have been filed, registered and recorded, as the law 
          may require or the Agent may request, in each jurisdiction where so 
          required or requested.

     The Borrower further agrees to execute, or cause its Subsidiaries to 
     execute, any and all further documents, financing statements, agreements 
     and instruments, and take all further actions (including filing Uniform 
     Commercial Code financing statements), which may be required under 
     applicable law, or which the Agent may reasonably request, in order to 
     effectuate the transactions contemplated by this Agreement and in order 
     to grant, preserve, protect and perfect the validity and first priority 
     of any security interests created pursuant to CLAUSE (i) above.  The 
     Borrower will also provide and cause its Subsidiaries to provide at 
     their own expense to the Agent such title opinions, operating agreements 
     and other instruments and documents relating to the Collateral then in 
     the possession of the Borrower or any Subsidiary as the Agent may 
     reasonably request."


                                      13


     (w)  SECTION 8.2 of the Credit Agreement is amended hereby by (i) 
deleting "or;" at the end of SUBSECTION (a) thereof, (ii) replacing "." 
following SUBSECTION (b) thereof with "; or", and (iii) inserting the 
following SUBSECTION (c) following SUBSECTION (b) thereof:

     "    (c)  create, incur, assume or suffer to exist or otherwise become 
     or be liable in respect of any subordinated Indebtedness except as 
     specifically permitted by the definition of "Subordinated Indebtedness"."

     (x)  SECTION 8.3 of the Credit Agreement is amended hereby by (i) 
deleting "and" at the end of SUBSECTION (l) thereof, (ii) replacing "." 
following SUBSECTION (m) thereof with "; and", and (iii) inserting the 
following SUBSECTION (n) following SUBSECTION (m) thereof:

     "    (n)  Liens securing payment of the Senior Debt, granted pursuant to 
     any Security Document executed by the Borrower pursuant to SECTION 7.11."

     (y)  SUBSECTION 8.6(b)(i) of the Credit Agreement is amended hereby by 
replacing "August 1, 2000" with "July 1, 2000".

     (z)  SECTION 10.3 of the Credit Agreement is amended hereby in its 
entirety to the following:

     "    SECTION 10.3 EXCULPATION.  Neither the Agent, the Co-Agent nor any 
     of their directors, officers, employees or agents shall be liable to any 
     Lender for any action taken or omitted to be taken by it under this 
     Agreement or any other Loan Document, or in connection herewith or 
     therewith, except for their own wilful misconduct or gross negligence, 
     nor responsible for any recitals or warranties herein or therein, nor 
     for the effectiveness, enforceability, validity or due execution of this 
     Agreement or any other Loan Document, nor for the creation, perfection 
     or priority of any Liens which may be created in the future by any of 
     the Security Documents, or the validity, genuineness, enforceability, 
     existence, value or sufficiency of any Collateral nor to make any 
     inquiry respecting the performance by the Borrower of its obligations 
     hereunder or under any other Loan Document.  The Agent and the Co-Agent 
     shall each be entitled to rely upon advice of counsel concerning legal 
     matters and upon any notice, consent, certificate, statement or writing 
     which the Agent or the Co-Agent believes to be genuine and to have been 
     presented by a proper Person."

     (aa) SUBSECTION 11.1(b) of the Credit Agreement is amended hereby in its 
entirety to the following:

     "    (b)  modify this SECTION 11.1, change the definition of "REQUIRED 
     LENDERS", increase any Commitment Amount or the Percentage of any 
     Lender, change the definition of "PRIME RATE" or "LIBO RATE" to reduce 
     interest payable or the Applicable Margin by the Borrower, reduce any 
     fees described in ARTICLE III, release


                                      14


     any Collateral, or extend any Revolving Loan Commitment Termination Date 
     or Term Loan Commitment Termination Date, without the consent of each 
     Lender and each holder of a Note;".

     (bb) SECTION 11.3 of the Credit Agreement is amended hereby by (i) 
deleting "and" at the end of SUBSECTION (a), (ii) relettering SUBSECTION (b) 
thereof as SUBSECTION (c), and (iii) inserting the following SUBSECTION (b) 
following SUBSECTION (a) thereof:

     "    (b)  any costs incurred pursuant to obtaining a security interest 
     in the Borrower's property, including fees and disbursements to special 
     counsel to Lenders and expenses of any filing, recording, refiling or 
     rerecording of the Security Documents and/or any Uniform Commercial Code 
     financing statements relating thereto and all amendments, supplements 
     and modifications to any thereof and any and all other documents or 
     instruments of further assurance which may be required to be filed or 
     recorded or refiled or rerecorded pursuant to the terms of SECTION 7.11 
     or relating to any Lien for benefit of the Lenders, and".

     (cc) SECTION 11.4 of the Credit Agreement is amended hereby by replacing 
"the Co-Agents and each Agent" with "the Agent, the Collateral Agent and the 
Co-Agent".

     (dd) ARTICLE XI of the Credit Agreement is amended hereby by inserting 
the following SECTION 11.14 following SECTION 11.13 thereof:

     "    SECTION 11.14  COLLATERAL AGENT.  Each Lender and BMO Financial, 
     Inc. hereby agree that, upon the execution and delivery of any Security 
     Document pursuant to SECTION 7.11, BMO Financial, Inc. shall serve as 
     Collateral Agent and each Lender hereby appoints BMO Financial, Inc. as 
     its Collateral Agent under and for purposes of the Security Documents.  
     Each Lender and the Borrower also agree that, upon the execution and 
     delivery of any Security Document pursuant to SECTION 7.11, all benefits 
     of ARTICLE X shall inure to the benefit of BMO Financial, Inc., as if it 
     were Agent, as to any actions taken or omitted to be taken while it acts 
     as Collateral Agent and BMO Financial, Inc., in its capacity as 
     Collateral Agent shall, in addition, become vested with all rights, 
     privileges and protections afforded to the Agent pursuant to SECTION 
     11.1(d) and 11.3.  Nothing contained herein or in the Exhibits hereto 
     shall require BMO Financial, Inc. to act as Collateral Agent under the 
     Security Documents unless it receives such indemnifications and other 
     assurances as it deems appropriate in its sole discretion and in the 
     event that BMO Financial, Inc. does not act as Collateral Agent, the 
     Required Lenders may designate another Collateral Agent."

     (ee) The second paragraph of EXHIBIT B - BORROWING REQUEST to the Credit 
Agreement is amended hereby by deleting the second and third sentences of 
such paragraph in their entirety.


                                      15


     (ff) The Credit Agreement is hereby amended by inserting EXHIBIT G to 
this Amendment as EXHIBIT G to the Credit Agreement following EXHIBIT F to 
the Credit Agreement.

     3.   REPRESENTATIONS AND WARRANTIES.

     In order to induce the Lenders and the Agents to enter into this 
Amendment, the Borrower hereby reaffirms, as of the date hereof, its 
representations and warranties contained in ARTICLE VI of the Credit 
Agreement (except to the extent any such representation and warranty relates 
solely to an earlier date) and additionally represents and warrants as 
follows:

     3.1  ORGANIZATION.  The Borrower and each of its corporate Subsidiaries 
is a corporation validly organized and existing and in good standing under 
the laws of the state, or country, of its incorporation, and is duly 
qualified to do business and is in good standing as a foreign corporation in 
each jurisdiction where the nature of its business requires such 
qualification, except where failure to qualify would not have a material 
adverse effect on the business or financial condition of the Borrower and its 
Subsidiaries taken as a whole or the Borrower's ability to perform the Loan 
Documents, as such may be amended hereby, or this Amendment.  Each of the 
Borrower's Subsidiaries which is organized as a partnership is validly 
organized and existing and in good standing under the laws of the state of 
its formation, and is duly qualified to do business and is in good standing 
as a foreign partnership where the nature of its business requires such 
qualification, except where failure to qualify would not have a material 
adverse effect on the business or financial condition of the Borrower, or the 
Borrower and its Subsidiaries taken as a whole or the Borrower's ability to 
perform under the Loan Documents, as such may be amended hereby, or this 
Amendment.  The Borrower and each of its Subsidiaries has full power and 
authority and holds all requisite governmental licenses, permits and other 
approvals to enter into and perform its Obligations under the Credit 
Agreement, as amended hereby, each other Loan Document and this Amendment and 
to own and hold under lease its property and to conduct its business 
substantially as currently conducted by it.

     3.2  DUE AUTHORIZATION, NON-CONTRAVENTION.  The execution, delivery and 
performance by the Borrower of this Amendment and the consummation of the 
transactions contemplated hereby and by the Credit Agreement as so amended, 
are within the Borrower's corporate powers, have been duly authorized by all 
necessary corporate action, and do not

               (a)  contravene the Borrower's Organic Documents;

               (b)  contravene any contractual restriction, law or 
     governmental regulation or court decree or order binding on or affecting 
     the Borrower or any Subsidiary; or

               (c)  result in, or require the creation or imposition of, any 
     Lien on any properties of the Borrower or its Subsidiaries except as 
     Liens will be imposed, created, or required upon execution and delivery 
     of the Security Documents pursuant to SECTION 7.11 of the Credit 
     Agreement.


                                      16


     3.3  GOVERNMENTAL APPROVAL.  No authorization or approval or other 
action by, and no notice to or filing with, any governmental authority or 
regulatory body is required for the due execution, delivery or performance by 
the Borrower of this Amendment.

     3.4  VALIDITY, ETC.  This Amendment and the Credit Agreement as amended 
hereby constitute the legal, valid and binding obligations of the Borrower, 
enforceable in accordance with their respective terms except as such 
enforceability is subject to the effect of (i) any applicable bankruptcy, 
insolvency, reorganization or similar law relating to or affecting creditors' 
rights generally and (ii) general principles of equity (regardless of whether 
such enforceability is considered in a proceeding in equity or at law), 
including concepts of materiality, reasonableness, good faith and fair 
dealing.

     4.   COVENANT.

     The Borrower agrees that, at the request of the Agent, Borrower will 
enter into a restated Credit Agreement with the Agent, the Co-Agent and the 
Lenders in substantially the form of the Credit Agreement as amended by this 
Amendment.

     5.   EFFECT OF AMENDMENT.

     This Amendment shall be deemed to be an amendment to the Credit 
Agreement, and the Credit Agreement, as amended hereby, is hereby ratified, 
approved and confirmed in each and every respect.  All references to the 
Credit Agreement in any other document, instrument, agreement or writing 
shall hereafter be deemed to refer to the Credit Agreement as amended hereby.

     6.   GOVERNING LAW, SEVERABILITY, ETC.

     THIS AMENDMENT SHALL BE A CONTRACT MADE UNDER AND GOVERNED BY THE 
INTERNAL LAWS OF THE STATE OF ILLINOIS.  Whenever possible each provision of 
this Amendment shall be interpreted in such manner as to be effective and 
valid under applicable law, but if any provision of this Amendment shall be 
prohibited by or invalid under applicable law, such provision shall be 
ineffective to the extent of such prohibition or invalidity, without 
invalidating the remainder of such provision or the remaining provisions of 
this Amendment.

     THIS WRITTEN AMENDMENT AND THE CREDIT AGREEMENT AS AMENDED BY THIS 
AMENDMENT REPRESENT THE FINAL AGREEMENT AMONG THE PARTIES AND MAY NOT BE 
CONTRADICTED BY PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE 
PARTIES.  THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

     7.   MISCELLANEOUS.

     7.1  SUCCESSORS AND ASSIGNS.  This Amendment shall be binding upon and 
shall inure to the benefit of the parties hereto and their respective 
successors and assigns.


                                      17


     7.2  COUNTERPARTS.  This Amendment may be executed in one or more 
counterparts, each of which shall be deemed an original but all of which 
together shall constitute one and the same instrument.

     7.3  EFFECTIVENESS.  This Amendment shall become effective when (i) 
counterparts hereof executed on behalf of the Borrower and each Lender (or 
notice thereof satisfactory to the Agent) shall have been received by the 
Agent, (ii) Agent has received, for the account of each Lender, the amendment 
fee described in that certain fee letter agreement dated of even date with 
this Amendment, between the Borrower and the Agent, (iii) when the Agent and 
the Co-Agent shall have received the fees described in those certain fee 
letter agreements dated of even date with this Amendment, between the 
Borrower and the Agent and the Co-Agent, respectively, and (iv) notice 
thereof shall have been given by the Agent to the Borrower and each Lender.


                                      18


     IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be 
executed by their respective officers thereunto duly authorized as of the day 
and year first written above.


                             POGO PRODUCING COMPANY


                             By: /s/ JOHN W. ELSENHHANS
                                 ----------------------
                             Name:  John W.  Elsenhans
                             Title: Vice President and Chief Financial Officer


                                    S - 1


                             BANK OF MONTREAL, acting through its U.S. branches
                             and agencies, including initially its Chicago
                             Illinois branch, as Agent


                             By: /s/ ROBERT L. ROBERTS
                                 ---------------------
                             Name:  Robert L. Roberts
                             Title: Director, U.S. Corporate Banking


                                    S - 2


                             PARIBAS, formerly known as Banque Paribas,
                             as Co-Agent


                             By: /s/ BARTON P. SCHOUEST
                                 ----------------------
                             Name:  Barton P. Schouest
                             Title: Managing Director

                             By: /s/ DOUGLAS R. LIFTMAN
                                 ----------------------
                             Name:  Douglas R. Liftman
                             Title: Vice President


                                    S - 3


                             BANK OF MONTREAL, as a Lender


                             By: /s/ ROBERT L. ROBERTS
                                 ---------------------
                             Name:  Robert L. Roberts
                             Title: Director, U.S. Corporate Banking


                                    S - 4


                             PARIBAS, formerly known as Banque Paribas,
                             as a Lender


                             By: /s/ BARTON P. SCHOUEST
                                 ----------------------
                             Name:  Barton P. Schouest
                             Title: Managing Director

                             By:/s/ DOUGLAS R. LIFTMAN
                                 ----------------------
                             Name:  Douglas R. Liftman
                             Title: Vice President


                                    S - 5


                             BANKBOSTON, N.A., as a Lender


                             By: /s/ TERRENCE RONEN
                                 ------------------
                             Name:  Terrence Ronen
                             Title: Director


                                    S - 6


                             NATIONSBANK, N.A., as a Lender


                             By: /s/ PAUL A. SQUIRES
                                 --------------------
                             Name:  Paul A. Squires
                             Title: Senior Vice President


                                    S - 7


                             THE CHASE MANHATTAN BANK, N.A., as a Lender


                             By: /s/ STEVEN WOOD
                                 ---------------
                             Name:  Steven Wood
                             Title: Vice President


                                    S - 8


                             SOCIETE GENERALE, as a Lender


                             By: /s/ PAUL E. CORNELL
                                 -------------------
                             Name:  Paul E. Cornell
                             Title: Managing Director


                                    S - 9


                             TORONTO DOMINION (TEXAS), INC., as a Lender


                             By: /s/ CAROL BRANDT
                                 ----------------
                             Name:  Carol Brandt
                             Title: Vice President


                                    S - 10


                             THE SANWA BANK LIMITED, NEW YORK BRANCH, as a
                             Lender


                             By: /s/ MR. TAKURO OJIMA
                                 --------------------
                             Name:  Mr. Takuro Ojima
                             Title: Assistant Vice President


                                    S - 11