EXHIBIT 10.2

                                 FIRST AMENDMENT

                                       TO

                        5-YEAR REVOLVING CREDIT AGREEMENT

                                   dated as of

                                  June 9, 2004

                                      among

                       PIONEER NATURAL RESOURCES COMPANY,

                                 as the Borrower



                              JPMORGAN CHASE BANK,
                             as Administrative Agent


                 JPMORGAN CHASE BANK and BANK OF AMERICA, N.A.,

                                as Issuing Banks


                                       and
                            The Lenders Party Hereto


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


                      WACHOVIA BANK, NATIONAL ASSOCIATION,
                              as Syndication Agent


        BANK OF AMERICA, N.A., BANK ONE, N.A., FLEET NATIONAL BANK, WELLS
                        FARGO BANK, NATIONAL ASSOCIATION,
                           as Co-Documentation Agents


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


                    J.P. MORGAN SECURITIES INC. and WACHOVIA
                    CAPITAL MARKETS, LLC, as Co-Arrangers and
                                Joint Bookrunners







     THIS FIRST AMENDMENT TO CREDIT  AGREEMENT 5-Year Revolving Credit Agreement
(this  "First  Amendment")  dated  as of June 9,  2004,  among  Pioneer  Natural
Resources Company, a Delaware corporation, as the Borrower, JPMorgan Chase Bank,
as  Administrative  Agent,  JPMorgan  Chase Bank and Bank of America,  N.A.,  as
Issuing Banks, the Lenders party hereto, Wachovia Bank, National Association, as
Syndication  Agent, Bank of America,  N.A., Bank One, N.A., Fleet National Bank,
Wells Fargo Bank, National  Association,  as Co-Documentation  Agents,  and J.P.
Morgan  Securities Inc. and Wachovia Capital  Markets,  LLC, as Co-Arrangers and
Joint Bookrunners.

                                 R E C I T A L S

     A.  The  Borrower,  the  Administrative  Agent,  the  Co-Arrangers,   Joint
Bookrunners,  Syndication Agent and Co-Documentation  Agents and the Lenders are
parties to that  certain  Credit  Agreement  dated as of December  16, 2003 (the
"Credit  Agreement"),  pursuant to which the Lenders  have made  certain  credit
available to and on behalf of the Borrower.

     B. The Borrower has  requested and the Lenders have agreed to amend certain
provisions of the Credit Agreement.

     C.  NOW,  THEREFORE,  in  consideration  of the  premises  and  the  mutual
covenants herein contained, for good and valuable consideration, the receipt and
sufficiency  of which are  hereby  acknowledged,  the  parties  hereto  agree as
follows:

     Section 1. Defined  Terms.  Each  capitalized  term which is defined in the
Credit Agreement,  but which is not defined in this First Amendment,  shall have
the  meaning  ascribed  such  term in the  Credit  Agreement.  Unless  otherwise
indicated,  all section  references in this First Amendment refer to sections of
the Credit Agreement.

     Section 2.  Amendments to Credit Agreement.

     2.1   Amendments to Section 1.01.

     (a)   The definitions of "Agreement" and  "Subsidiary Guarantor" in Section
1.01 of the Credit Agreement are hereby amended to read as follows:

           "Agreement"  means this  Credit Agreement,  as  amended  by the First
     Amendment,  as  the  same may  from  time  to time  be  amended,  modified,
     supplemented or restated.

           "Subsidiary Guarantor"  means  any  Subsidiary  that  is  required to
     execute and deliver a Subsidiary Guaranty.

     (b)   The definitions of "First  Amendment"  and "Total  Adjusted Debt" are
hereby  added  in  Section  1.01  the  Credit  Agreement  where   alphabetically
appropriate to read as follows:

           "First  Amendment"  means  that  certain  First  Amendment  to Credit
     Agreement dated as of June 9,  2004 among the Borrower,  the Administrative
     Agent,  the  Co-Arrangers,  Joint  Bookrunners,  Syndication  Agent and Co-
     Documentation Agents and the Lenders.



                                        2





           "Total Adjusted Debt"  means  as of  any  date of  determination, all
     Indebtedness  (without  duplication)  of the  Borrower  and the  Restricted
     Subsidiaries on a consolidated basis  (including any  Indebtedness proposed
     to be incurred on such date of determination and excluding all Indebtedness
     to be paid on such date of determination with the proceeds thereof).

     2.2   Amendment to Section 6.01.  Section  6.01 of the  Credit Agreement is
hereby amended and restated in its entirety to read as follows:

     "Section 6.01  Indebtedness.

                   (a) The Borrower will not, and will not permit any Restricted
Subsidiary to,  create, incur,  assume or permit to exist (collectively "incur")
any Indebtedness if the Borrower would be in breach of any covenant set forth in
Section 6.04 as a result of such incurrence.

                   (b) The Borrower will not permit any Restricted Subsidiary to
incur Indebtedness  included in the definition of Total Adjusted Debt (including
for this  purpose,  the  amount of such  Indebtedness  of the  Borrower  that is
Guaranteed  by  one  or  more  Restricted  Subsidiaries)  except  for  (i)  such
Indebtedness  consisting of obligations,  contingent or otherwise, in respect of
letters of credit outstanding at such time for all Restricted Subsidiaries in an
aggregate  amount not  exceeding  $50,000,000  and (ii) other such  Indebtedness
(including without limitation,  obligations, contingent or otherwise, in respect
of  letters of credit in excess of the  amount  permitted  by clause (i) of this
Section 6.01(b)) outstanding at such time for all Restricted  Subsidiaries in an
aggregate amount not exceeding $150,000,000."

     2.3   Amendment to Section 6.05(b). Section 6.05(b) of the Credit Agreement
is hereby amended and restated in its entirety to read as follows:

                   "(b) No Subsidiary shall  Guarantee any Indebtedness included
in  the  definition  of  Total  Adjusted  Debt,  except  for  Indebtedness  of a
Restricted  Subsidiary  permitted  by  Section  6.01(b),  unless  it shall  have
previously  or  concurrently  therewith  executed  and  delivered  a  Subsidiary
Guaranty to the Administrative Agent together with the items in Sections 4.01(c)
and (d) as to such Subsidiary Guarantor and the Subsidiary Guaranty."

     Section 3.  Termination of Subsidiary Guaranty.  The Subsidiary Guaranty of
Pioneer Natural Resources USA, Inc. is hereby terminated.

     Section 4.  Conditions Precedent. The effectiveness of this First Amendment
is subject to the receipt by the Administrative Agent of the following documents
and satisfaction of the other conditions specified in this Section 4:

     4.1  Counterparts of First Amendment. The Administrative Agent shall have
received from the Borrower and the Required  Lenders  multiple  counterparts (in
such  number as may be  requested  by the  Administrative  Agent) of this  First
Amendment signed on behalf of each such party.

     4.2  No Default. No Default shall have occurred and be continuing as of the
date hereof, after giving effect to the terms of this First Amendment.


                                        3





     4.3  Concurrent Termination.  As a  result of  and  concurrently  with  the
termination  of the  Subsidiary  Guaranty,  any  guarantee  by  Pioneer  Natural
Resources  USA,  Inc. of any other  Indebtedness  included in the  definition of
Total  Adjusted  Debt,  except  for  Indebtedness  of  a  Restricted  Subsidiary
permitted by Section 6.01(b), shall be automatically terminated.

     Section 5.    Miscellaneous.

     5.1  Confirmation.  The provisions of the  Credit Agreement,  as amended by
this First Amendment, shall remain in  full force and  effect in accordance with
its terms following the effectiveness of this First Amendment.

     5.2  Ratification and  Affirmation;  Representations  and  Warranties.  The
Borrower  hereby (a)  represents and warrants to the Lenders that as of the date
hereof, after giving effect to the terms of this First Amendment, (i) all of the
representations and warranties  contained in each Loan Document to which it is a
party are true and correct,  except to the extent any such  representations  and
warranties  are  expressly  limited  to an earlier  date,  in which  case,  such
representations  and  warranties  shall  continue  to be true and correct in all
material  respects as of such  specified  earlier date,  and (ii) no Default has
occurred and is continuing.

     5.3  Loan Document.  This First Amendment is a  "Loan Document"  as defined
and described in the Credit Agreement and all of the terms and provisions of the
Credit Agreement relating to Loan Documents shall apply hereto.

     5.4  Counterparts.  This First Amendment may be  executed by one or more of
the  parties  hereto in any  number of  separate  counterparts,  and all of such
counterparts  taken  together  shall be  deemed to  constitute  one and the same
instrument.  Delivery of this First Amendment by facsimile transmission shall be
effective as delivery of a manually executed counterpart hereof.

     5.5  No Oral Agreement. This First Amendment,  the Credit Agreement and the
other Loan  Documents  executed  in  connection  therewith  represent  the final
agreement  between the parties and may not be contradicted by evidence of prior,
contemporaneous,  or unwritten  oral  agreements  of the  parties.  There are no
subsequent oral agreements between the parties.

     5.6  GOVERNING  LAW.  THIS  FIRST  AMENDMENT  SHALL  BE  GOVERNED  BY,  AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF TEXAS.

                          [SIGNATURES BEGIN NEXT PAGE]


                                        4





         IN WITNESS WHEREOF, the parties hereto have caused this First Amendment
to be duly executed as of the date first written above.

Borrower:                               PIONEER NATURAL RESOURCES
- --------                                COMPANY

                                        By:   /s/ Timothy L. Dove
                                             ----------------------------------
                                        Name:  Timothy L. Dove
                                        Title: Executive Vice President and
                                               Chief Financial Officer





Administrative Agent & Lender:          JPMORGAN CHASE BANK
- -----------------------------
                                        By:   /s/ Robert C. Mertensotto
                                             ----------------------------------
                                        Name:  Robert C. Mertensotto
                                        Title: Managing Director





Co-Arranger:                            J.P. MORGAN SECURITIES INC.
- -----------
                                        By:   /s/ George M. Serice
                                             ----------------------------------
                                        Name:  George M. Serice
                                        Title: Vice President





Co-Arranger:                            WACHOVIA CAPITAL MARKETS, LLC
- -----------
                                        By:   /s/ David Humphreys
                                             ----------------------------------
                                        Name:  David Humphreys
                                        Title: Director



                                       S-1






Syndication Agent & Lender:             WACHOVIA BANK, NATIONAL
- --------------------------              ASSOCIATION

                                        By:   /s/ David Humphreys
                                             ----------------------------------
                                        Name:  David Humphreys
                                        Title: Director




Documentation Agent & Lender:           BANK OF AMERICA, N.A.
- ----------------------------
                                        By:   /s/ Ronald E. McKaig
                                             ----------------------------------
                                        Name:  Ronald E. McKaig
                                        Title: Managing Director




Documentation Agent & Lender:           BANK ONE, N.A.
- ----------------------------            (MAIN OFFICE CHICAGO)

                                        By:
                                             ----------------------------------
                                        Name:
                                        Title:




Documentation Agent & Lender:           FLEET NATIONAL BANK
- ----------------------------
                                        By:
                                             ----------------------------------
                                        Name:
                                        Title:




Documentation Agent & Lender:           WELLS FARGO BANK, NATIONAL
- ----------------------------            ASSOCIATION

                                        By:   /s/ David C. Brooks
                                             ----------------------------------
                                        Name:  David C. Brooks
                                        Title: Vice President


                                       S-2






Lenders:                                ABN AMRO
- -------
                                        By:
                                             ----------------------------------
                                        Name:
                                        Title:




                                        By:
                                             ----------------------------------
                                        Name:
                                        Title:




                                        CITIBANK, N.A.

                                        By:
                                             ----------------------------------
                                        Name:
                                        Title:



                                        CALYON NEW YORK BRANCH,
                                        as successor in interest by
                                        consolidation to
                                        CREDIT AGRICOLE INDOSUEZ

                                        By:   /s/ Olivier Audemard
                                             ----------------------------------
                                        Name:  Olivier Audemard
                                        Title: Managing Director






                                       S-3






                                        CREDIT SUISSE FIRST BOSTON
                                        acting through its Cayman Islands Branch

                                        By:   /s/ Paul Colon
                                             ----------------------------------
                                        Name:  Paul Colon
                                        Title: Director


                                        By:   /s/ Karim Blasetti
                                             ----------------------------------
                                        Name:  Karim Blasetti
                                        Title: Associate




                                        DEUTSCHE BANK AG NEW YORK BRANCH

                                        By:   /s/ Michael Starmer Smith
                                             ----------------------------------
                                        Name:  Michael Starmer Smith
                                        Title: Managing Director




                                        By:   /s/ Oliver Riedinger
                                             ----------------------------------
                                        Name:  Oliver Riedinger
                                        Title: Vice President




                                        THE BANK OF NOVA SCOTIA

                                        By:
                                             ----------------------------------
                                        Name:
                                        Title:


                                        SCOTIABANC INC.

                                        By:
                                             ----------------------------------
                                        Name:
                                        Title:


                                       S-4






                                        SUNTRUST BANK

                                        By:   /s/ James M. Warren
                                             ----------------------------------
                                        Name:  James M. Warren
                                        Title: Director




                                        UNION BANK OF CALIFORNIA, N.A.

                                        By:
                                             ----------------------------------
                                        Name:
                                        Title:




                                        BARCLAYS BANK PLC

                                        By:   /s/ Nicholas A. Bell
                                             ----------------------------------
                                        Name:  Nicholas A. Bell
                                        Title: Director




                                        BNP PARIBAS

                                        By:   /s/ David Dodd
                                             ----------------------------------
                                        Name:  David Dodd
                                        Title: Director




                                        By:   /s/ Betsy Jocher
                                             ----------------------------------
                                        Name:  Betsy Jocher
                                        Title: Vice President





                                       S-5






                                        THE BANK OF NEW YORK

                                        By:
                                             ----------------------------------
                                        Name:
                                        Title:




                                        DNB NOR BANK ASA

                                        By:   /s/ Peter M. Dodge
                                             ----------------------------------
                                        Name:  Peter M. Dodge
                                        Title: First Vice President




                                        By:   /s/ Nils Fykse
                                             ----------------------------------
                                        Name:  Nils Fykse
                                        Title: Senior Vice President




                                        MIZUHO CORPORATE BANK, LTD

                                        By:
                                             ----------------------------------
                                        Name:
                                        Title:




                                        U.S. BANK NATIONAL ASSOCIATION

                                        By:   /s/ Mark E. Thompson
                                             ----------------------------------
                                        Name:  Mark E. Thompson
                                        Title: Vice President





                                       S-6






                                        WASHINGTON MUTUAL BANK, F.A.

                                        By:   /s/ Mark Isensee
                                             ----------------------------------
                                        Name:  Mark Isensee
                                        Title: Vice President




                                        AUSTRALIA AND NEW ZEALAND
                                        BANKING GROUP LIMITED

                                        By:   /s/ John W. Wade
                                             ----------------------------------
                                        Name:  John W. Wade
                                        Title: Director




                                        HARRIS NESBITT FINANCING, INC.
                                        (fka BMO NESBITT BURNS FINANCING, INC.)

                                        By:   /s/ James V. Ducote
                                             ----------------------------------
                                        Name:  James V. Ducote
                                        Title: Vice President




                                        KBC BANK N.V.

                                        By:
                                             ----------------------------------
                                        Name:
                                        Title:




                                        By:
                                             ----------------------------------
                                        Name:
                                        Title:




                                       S-7





                                        TORONTO DOMINION (TEXAS), INC.

                                        By:   /s/ Mark A. Baird
                                             ----------------------------------
                                        Name:  Mark A. Baird
                                        Title: Vice President




                                        UFJ BANK LIMITED

                                        By:   /s/ Clyde L. Redford
                                             ----------------------------------
                                        Name:  Clyde L. Redford
                                        Title: Senior Vice President





                                       S-8