EXHIBIT 99.2
                                                                    ------------


                                 FIRST AMENDMENT
                                       TO
                  FOURTH AMENDED AND RESTATED CREDIT AGREEMENT


         THIS FIRST  AMENDMENT TO FOURTH AMENDED AND RESTATED  CREDIT  AGREEMENT
(herein called this "AMENDMENT") is dated as of November 17, 2004 (but effective
on the Effective  Date,  defined  below in Section 3.1) by and among  Chesapeake
Exploration Limited Partnership,  an Oklahoma limited partnership  ("BORROWER"),
Chesapeake Energy Corporation,  an Oklahoma corporation ("COMPANY"),  Union Bank
of   California,   N.A.,   as   administrative   agent  and   collateral   agent
("ADMINISTRATIVE AGENT"), and the several banks and other financial institutions
or entities party hereto ("LENDERS").

                              W I T N E S S E T H:

         WHEREAS,  Borrower,  Company,  Administrative Agent and Lenders entered
into that certain Fourth Amended and Restated  Credit  Agreement dated as of May
7, 2004 (as amended, supplemented, or restated to the date hereof, the "ORIGINAL
AGREEMENT"),  for the  purpose  and  consideration  therein  expressed,  whereby
Lenders became obligated to make loans to Borrower as therein provided; and

         WHEREAS, Borrower, Company,  Administrative Agent and Lenders desire to
amend the Original Agreement as set forth herein;

         NOW,  THEREFORE,  in  consideration  of the  premises  and  the  mutual
covenants and  agreements  contained  herein and in the Original  Agreement,  in
consideration  of the loans which may  hereafter be made by Lenders to Borrower,
and for other good and valuable  consideration,  the receipt and  sufficiency of
which are hereby acknowledged, the parties hereto do hereby agree as follows:

                                   ARTICLE I.

                           DEFINITIONS AND REFERENCES
                           --------------------------

         Section  1.1.  TERMS  DEFINED  IN THE  ORIGINAL  AGREEMENT.  Unless the
context otherwise  requires or unless otherwise  expressly  defined herein,  the
terms defined in the Original  Agreement  shall have the same meanings  whenever
used in this Amendment.

         Section  1.2.  OTHER  DEFINED  TERMS.   Unless  the  context  otherwise
requires,  the  following  terms  when  used in this  Amendment  shall  have the
meanings assigned to them in this Section 1.2.

                  "AMENDMENT"  means this First  Amendment to Fourth Amended and
        Restated Credit Agreement.

                  "CREDIT  AGREEMENT"  means the  Original  Agreement as amended
        hereby.

                  "EFFECTIVE DATE" has the meaning given to such term in SECTION





                                   ARTICLE II.

                                   AMENDMENTS
                                   ----------

         Section 2.1.      DEFINED TERMS.

                  (a) The proviso at the end of the  definition  of  "Applicable
Margin"  in  SECTION  1.1 of the  Original  Agreement  is hereby  amended in its
entirety to read as follows:

                  "PROVIDED,  that,  prior to January 1,  2006,  the  Applicable
Margin with  respect to each Type of  Revolving  Loan will be set based on Level
III."

                  (b) The proviso at the end of the  definition  of  "Commitment
Fee Rate" in SECTION  1.1 of the  Original  Agreement  is hereby  amended in its
entirety to read as follows:

                  "PROVIDED,  that, prior to January 1, 2006, the Commitment Fee
Rate will be set based on Level III."


                                  ARTICLE III.

                      CONDITIONS OF EFFECTIVENESS; CLOSING
                      ------------------------------------

         Section 3.1.      EFFECTIVE DATE. This Amendment shall become effective
on the date when all of the following conditions precedent have been satisfied
(the "EFFECTIVE DATE").

         (a) Administrative Agent shall have received, at Administrative Agent's
office,  duly executed and delivered and in form and substance  satisfactory  to
Administrative Agent, all of the following:

                  (i) this  Amendment  duly  executed by  Borrower,  Company and
         Administrative Agent and each Lender;

                  (ii) the Consent  Agreement  attached  hereto duly executed by
         all Subsidiary Guarantors;

                  (iii) a favorable opinion of Commercial Law Group, counsel for
         the Company,  Borrower and the Subsidiary Guarantors,  substantially in
         the form set forth in EXHIBIT F of the Original Agreement;

                  (iv) an "Omnibus  Certificate" of the Secretary of the general
         partner of Borrower,  which shall  contain the names and  signatures of
         the officers of the general  partner of Borrower  authorized to execute
         Loan  Documents and which shall certify to the truth,  correctness  and
         completeness of the following exhibits attached thereto:  (1) a copy of
         resolutions  attached thereto duly adopted by the Board of Directors of
         the  general  partner of  Borrower  and in full force and effect at the
         time this Amendment is entered into,  authorizing the execution of this
         Amendment and the other Loan Documents  delivered or to be delivered in
         connection   herewith  and  the   consummation   of  the   transactions
         contemplated herein and therein, (2) a copy of the charter documents of
         Borrower  and of the  general  partner of Borrower  and all  amendments
         thereto,  certified by the appropriate official of the Borrower's state
         and  general  partner's  state of  organization,  and (3) a copy of any
         bylaws of the general partner of Borrower previously delivered to Agent
         and Lenders in connection with the Original  Agreement (which may, with
         respect to any such charter  documents or bylaws,  reference  documents
         previously delivered in connection with the Original Agreement);

                  (v)  a  "Compliance  Certificate"  of  the  Treasurer  of  the
         Company,  which shall contain (1) a certification by such officer as to
         the satisfaction of the conditions set out in subsections (a), (b), and
         (c) of SECTION 5.2 of the Original  Agreement and (2) the  calculations
         required to determine the Senior Debt Limit (along with the  supporting
         documentation described in SECTION 5.2(C) of the Original Agreement);

                  (vi) one or more certificates  certifying documents similar to
         those specified in subsection (iv) of this Section with respect to each
         Subsidiary  Guarantor (which may, with respect to charter  documents or
         bylaws, reference documents previously delivered in connection with the
         Original Agreement); and

                  (vii) such other supporting  documents as Administrative Agent
         may reasonably request.


                                       2

                                   ARTICLE IV.

                         REPRESENTATIONS AND WARRANTIES
                         ------------------------------

         Section 4.1.      REPRESENTATIONS AND WARRANTIES OF BORROWER. In order
to induce each Lender to enter into this Amendment, Borrower represents and
warrants to each Lender that:

         (a) The  representations  and warranties  contained in SECTION 4 of the
Original  Agreement  are  true  and  correct  at  and  as of  the  time  of  the
effectiveness  hereof,  except  to the  extent  that the  facts  on  which  such
representations  and  warranties are based have been changed by the extension of
credit under the Credit Agreement.

         (b) The Company and Borrower are duly authorized to execute and deliver
this Amendment and are and will continue to be duly  authorized to borrow monies
and to perform their  respective  obligations  under the Credit  Agreement.  The
Company  and  Borrower  have duly  taken all  corporate  or  partnership  action
necessary to authorize  the  execution  and  delivery of this  Amendment  and to
authorize  the  performance  of the  obligations  of the  Company  and  Borrower
hereunder.

         (c) The  execution  and  delivery by the  Company and  Borrower of this
Amendment,  the  performance  by the  Company and  Borrower  of its  obligations
hereunder and the  consummation of the transactions  contemplated  hereby do not
and will not conflict with any provision of law, statute,  rule or regulation or
of the certificate of incorporation, bylaws, or agreement of limited partnership
of the  Company or  Borrower  (as  applicable),  or of any  material  agreement,
judgment,  license, order or permit applicable to or binding upon the Company or
Borrower,  or result in the creation of any lien, charge or encumbrance upon any
assets or  properties  of the Company or  Borrower.  Except for those which have
been  obtained,  no consent,  approval,  authorization  or order of any court or
governmental  authority  or  third  party is  required  in  connection  with the
execution  and  delivery  by the Company and  Borrower of this  Amendment  or to
consummate the transactions contemplated hereby.

         (d) When duly executed and  delivered,  each of this  Amendment and the
Credit  Agreement  will be a legal and  binding  obligation  of the  Company and
Borrower,  enforceable  in  accordance  with its  terms,  except as  limited  by
bankruptcy,  insolvency or similar laws of general  application  relating to the
enforcement  of  creditors'  rights  and  by  equitable  principles  of  general
application.

         (e) The audited annual consolidated financial statements of the Company
dated as of December 31, 2003 and the unaudited quarterly consolidated financial
statements  of the Company  dated as of  September  30, 2004 fairly  present the
consolidated  financial position at such dates and the consolidated statement of
operations and the changes in  consolidated  financial  position for the periods
ending on such dates for the Company.  Copies of such financial  statements have
heretofore been delivered to each Lender.  Since such dates no material  adverse
change  has  occurred  in  the  financial  condition  or  businesses  or in  the
consolidated financial condition or businesses of the Company.


                                       3


                                   ARTICLE V.

                                  MISCELLANEOUS
                                  -------------

         Section 5.1.  RATIFICATION  OF  AGREEMENTS.  The Original  Agreement as
hereby amended is hereby  ratified and confirmed in all respects.  Any reference
to the Credit  Agreement in any Loan Document  shall be deemed to be a reference
to the  Original  Agreement  as hereby  amended.  The  execution,  delivery  and
effectiveness of this Amendment shall not, except as expressly  provided herein,
operate  as a waiver of any right,  power or remedy of Lenders  under the Credit
Agreement,  the Notes, or any other Loan Document nor constitute a waiver of any
provision of the Credit Agreement, the Notes or any other Loan Document.

         Section 5.2. SURVIVAL OF AGREEMENTS.  All representations,  warranties,
covenants  and  agreements  of Borrower  herein shall  survive the execution and
delivery  of  this  Amendment  and the  performance  hereof,  including  without
limitation the making or granting of the Loans,  and shall further survive until
all of the Obligations are paid in full. All statements and agreements contained
in any  certificate  or  instrument  delivered by the  Company,  Borrower or any
Subsidiary Guarantor hereunder or under the Credit Agreement to any Lender shall
be deemed to constitute representations and warranties by, and/or agreements and
covenants  of,  such Loan  Party  under  this  Amendment  and  under the  Credit
Agreement.

         Section 5.3. LOAN DOCUMENTS. This Amendment is a Loan Document, and all
provisions in the Credit Agreement pertaining to Loan Documents apply hereto.

         Section 5.4.  GOVERNING  LAW. This  Amendment  shall be governed by and
construed in accordance  with the laws of the State of Texas and any  applicable
laws of the United  States of America in all respects,  including  construction,
validity and performance.

         Section  5.5.  COUNTERPARTS;  FAX.  This  Amendment  may be  separately
executed  in  counterparts  and by the  different  parties  hereto  in  separate
counterparts,  each of which when so executed  shall be deemed to constitute one
and the same Amendment.  This Amendment may be validly  executed by facsimile or
other electronic transmission.

                                       4



         THIS  AMENDMENT  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
UNWRITTEN ORAL AGREEMENTS OF THE PARTIES.



              [THE REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK.
                            SIGNATURE PAGES FOLLOW.]


                                       5



         IN WITNESS  WHEREOF,  this  Amendment  is executed as of the date first
above written.

                                      CHESAPEAKE EXPLORATION LIMITED PARTNERSHIP

                                      By:      Chesapeake Operating, Inc.,
                                               its general partner


                                      By:      /S/ MARTHA A. BURGER
                                               --------------------------------
                                               Name:    Martha A. Burger
                                               Title:   Treasurer and
                                                        Sr. Vice President
                                                        Human Resources

                                      CHESAPEAKE ENERGY CORPORATION


                                      By:      /S/ MARTHA A. BURGER
                                               --------------------------------
                                               Name:    Martha A. Burger
                                               Title:   Treasurer and
                                                        Sr. Vice President
                                                        Human Resources



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       6



                                      UNION BANK OF CALIFORNIA, N.A.
                                      Administrative Agent, Collateral Agent,
                                      Issuing Lender and Lender


                                      By:      /S/ RANDALL OSTERBERG
                                               --------------------------------
                                               Name:   Randall Osterberg
                                               Title:  Senior Vice President


                                      By:      /S/ KIMBERLY CALL
                                               --------------------------------
                                               Name:    Kimberly Call
                                               Title:   Assistant Vice President



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement



                                       7



                                                             First Amendment to
                                                             Fourth Amended and
                                                      Restated Credit Agreement


                              CONSENT AND AGREEMENT

         By its  execution  below,  each  Guarantor  hereby (i)  consents to the
provisions of this  Amendment and the  transactions  contemplated  herein,  (ii)
ratifies and confirms the Second Amended and Restated Guarantee  Agreement dated
as of May 7, 2004 made by it for the benefit of Administrative Agent and Lenders
(as  modified by certain  Assumption  Agreements)  and the other Loan  Documents
executed  pursuant to the Credit Agreement (or any prior amendment or supplement
to the Credit  Agreement),  (iii) agrees that all of its respective  obligations
and covenants  thereunder shall remain  unimpaired by the execution and delivery
of this Amendment and the other documents and instruments executed in connection
herewith,  and (iv)  agrees  that the  Second  Amended  and  Restated  Guarantee
Agreement and such other Loan Documents shall remain in full force and effect.



                                      CHESAPEAKE ENERGY CORPORATION


                                      By:      /S/ MARTHA A. BURGER
                                               --------------------------------
                                               Martha A. Burger
                                               Treasurer and Senior Vice
                                               President - Human Resources


                                      CHESAPEAKE OPERATING, INC.


                                      By:      /S/ MARTHA A. BURGER
                                               --------------------------------
                                               Martha A. Burger
                                               Treasurer and Senior Vice
                                               President - Human Resources



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       8



                                      CHESAPEAKE SOUTH TEXAS CORP.
                                      CHESAPEAKE ENERGY LOUISIANA CORPORATION
                                      NOMAC DRILLING CORPORATION
                                      OXLEY PETROLEUM CO.
                                      CHESAPEAKE PRH CORP.
                                      CHESAPEAKE ENERGY MARKETING, INC.
                                      CHESAPEAKE BNR CORP.

                                      By:      /S/ MARTHA A. BURGER
                                               --------------------------------
                                               Martha A. Burger, Treasurer,
                                               on behalf of each of the
                                               foregoing corporations


                                      CARMEN ACQUISITION, L.L.C.
                                      CHESAPEAKE ACQUISITION, L.L.C.
                                      CHESAPEAKE ENO ACQUISITION, L.L.C.
                                      CHESAPEAKE FOCUS, L.L.C.
                                      CHESAPEAKE KNAN ACQUISITION, L.L.C.
                                      CHESAPEAKE MOUNTAIN FRONT, L.L.C.
                                      CHESAPEAKE ORC, L.L.C.
                                      CHESAPEAKE ROYALTY, L.L.C.
                                      CHESAPEAKE EP, L.L.C.
                                      GOTHIC PRODUCTION, L.L.C.
                                      MC MINERAL COMPANY, L.L.C.
                                      SAP ACQUISITION, L.L.C.
                                      JOHN C. OXLEY, L.L.C.
                                      CHESAPEAKE PERMIAN ACQUISITION, L.L.C.
                                      MAYFIELD PROCESSING, LLC


                                      By:      /S/ MARTHA A. BURGER
                                               --------------------------------
                                               Martha A. Burger, Treasurer, on
                                               behalf of each of the forgoing
                                               limited liability companies



                                       9



                                      CHESAPEAKE LOUISIANA, L.P.
                                      CHESAPEAKE SIGMA, L.P.
                                      CHESAPEAKE PERMIAN, L.P.
                                      CHESAPEAKE ZAPATA, L.P.
                                      Chesapeake-Staghorn Acquisition, L.P.
                                      CHESAPEAKE NFW, L.P.
                                      CHESAPEAKE LNG, L.P.
                                      By:  Chesapeake Operating, Inc., as
                                           General Partner on behalf of each of
                                           the foregoing limited partnerships


                                      By:      /S/ MARTHA A. BURGER
                                               --------------------------------
                                               Martha A. Burger, Treasurer and
                                               Senior Vice President -
                                               Human Resources


                                      MIDCON COMPRESSION, L.P.
                                      By:  Chesapeake Energy Marketing, Inc.,
                                           as General Partner


                                      By:      /S/ MARTHA A. BURGER
                                               --------------------------------
                                               Martha A. Burger
                                               Treasurer



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement


                                       10



                                      ARVEST BANK


                                      By:      /S/ CINDY BATT
                                               --------------------------------
                                               Name:    Cindy Bat
                                               Title:   Sr. Vice President



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       11



                                      BANK OF AMERICA, N.A.


                                      By:      /S/ RONALD E. MCKAIG
                                               --------------------------------
                                               Name:    Ronald E. McKaig
                                               Title:   Senior Vice President



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       12



                                      BANK OF OKLAHOMA


                                      By:      /S/ MARK MORRIS
                                               --------------------------------
                                               Name:    Mark Morris
                                               Title:   Vice President



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       13




                                      BANK OF SCOTLAND


                                      By:      /S/ AMENA NABI
                                               --------------------------------
                                               Name:    Amena Nabi
                                               Title:   Assistant Vice President



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       14



                                      BNP PARIBAS


                                      By:      /S/ DAVID DODD
                                               ---------------------------------
                                               Name:    David Dodd
                                               Title:   Director


                                      By:      /S/ POLLY SCHOTT
                                               --------------------------------
                                               Name:    Polly Schott
                                               Title:   Vice President



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       15



                                      COMERICA BANK


                                      By:      /S/ PETER L. SEFZIK
                                               --------------------------------
                                               Name:    Peter L. Sefzik
                                               Title:   Vice President



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       16



                                      COMPASS BANK


                                      By:      /S/ KATHLEEN J. BOWEN
                                               --------------------------------
                                               Name:    Kathleen J. Bowen
                                               Title:   Senior Vice President



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       17



                                      CALYON NEW YORK BRANCH


                                      By:      /S/ OLIVER AUDEMAND
                                               --------------------------------
                                               Name:    Oliver Audemand
                                               Title:   Managing Director


                                      By:      /S/ ATTILA COACH
                                               --------------------------------
                                               Name:    Attila Coach
                                               Title:   Managing Director



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       18



                                      CREDIT SUISSE FIRST BOSTON, acting through
                                      its Cayman Islands Branch


                                      By:      /S/ PAUL L. COLON
                                               --------------------------------
                                               Name:    Paul L. Colon
                                               Title:   Director


                                      By:      /S/ VANESSA GOMEZ
                                               --------------------------------
                                               Name:    Vanessa Gomez
                                               Title:   Associate



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       19



                                      DEUTSCHE BANK TRUST COMPANY AMERICAS


                                      By:      S/S MARCUS M. TARKINGTON
                                               --------------------------------
                                               Name:    Marcus M. Tarkington
                                               Title:   Director



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       20



                                      J. ARON & COMPANY


                                      By:      S/S PETER O'HAGAN
                                               --------------------------------
                                               Name:    Peter O'Hagan
                                               Title:   Managing Director



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       21



                                      NATEXIS BANQUES POPULAIRES


                                      By:      S/S DONOVAN C. BROUSSARD
                                               --------------------------------
                                               Name:    Donovan C. Broussard
                                               Title:   Vice President & Manager


                                      By:      /S/ TIMOTHY L. POLVADO
                                               --------------------------------
                                               Name:    Timothy L. Polvado
                                               Title:   Vice President & Manager



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       22



                                      PNC BANK


                                      By:      /S/ JOHN WATTINGER
                                               --------------------------------
                                               Name:    John Wattinger
                                               Title:   Vice President



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       23



                                      RZB FINANCE LLC


                                      By:      /S/ JUAN M. CSILLAGI
                                               --------------------------------
                                               Name:    Juan M. Csillagi
                                               Title:   Group Vice President


                                      By:      /S/ CHRISTOPH HOEDL
                                               --------------------------------
                                               Name:    Christoph Hoedl
                                               Title:   Vice President



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       24



                                      SUNTRUST BANK


                                      By:      /S/ JOE MCCREERY
                                               --------------------------------
                                               Name:    Joe McCreery
                                               Title:   Vice President



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       25



                                      TORONTO DOMINION (TEXAS), INC.


                                      By:      /S/ NEVA NEXBITT
                                               --------------------------------
                                               Name:    Neva Nexbitt
                                               Title:   Authorized Agent



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       26



                                      UBS LOAN FINANCE LLC


                                      By:      /S/ WILFRED V. SAINT
                                               --------------------------------
                                               Name:    Wilfred V. Saint
                                               Title:   Director Banking
                                                        Products Services US



                                      By:      /S/ JOSALIN FERNANDES
                                               --------------------------------
                                               Name:    Josalin Fernandes
                                               Title:   Associate Director
                                                        Banking Products
                                                        Services US



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       27



                                      WELLS FARGO BANK, N.A.


                                      By:      /S/ DUSTIN S. HANSEN
                                               --------------------------------
                                               Name:    Dustin S. Hansen
                                               Title:   Assistant Vice President



                      Signature Page to First Amendment to
                  Fourth Amended and Restated Credit Agreement

                                       28