Document:

Fifth Amendment to
                              Amended and Restated
             Agreement and Certificate of Limited Partnership of
                Geodyne Energy Income Limited Partnership I-F

     This Fifth  Amendment to Amended and Restated  Agreement and Certificate of
Limited  Partnership  of Geodyne  Energy  Income  Limited  Partnership  I-F (the
"Partnership")  is  entered  into  by  and  between  Geodyne   Resources,   Inc.
("Resources"),  a Delaware  corporation,  as successor General Partner,  and all
Substituted Limited Partners admitted to the Partnership.

     WHEREAS, on September 10, 1986, Geodyne Properties, Inc. ("Properties"), as
General  Partner,  and the Initial Limited Partner,  Susan Layman,  executed and
entered into that certain  PaineWebber/Geodyne Energy Income Limited Partnership
I-F  Agreement  and  Certificate  of  Limited   Partnership  (the  "Preformation
Agreement"); and

     WHEREAS,  on December 17, 1986,  Properties as General Partner executed and
entered into that certain  Amended and Restated  Agreement  and  Certificate  of
Limited Partnership (the "Agreement"); and

     WHEREAS,  on February 25, 1993,  Properties as General Partner executed and
entered into that First  Amendment to the  Agreement  whereby it changed (i) the
name  of  the  Partnership  from  "PaineWebber/Geodyne   Energy  Income  Limited
Partnership  I-F" to "Geodyne Energy Income Limited  Partnership  I-F", (ii) the
address of the Partnership's  principal place of business, and (iii) the address
for the Partnership's agent for service of process; and

     WHEREAS,  on August 4th, 1993,  Properties as General Partner  executed and
entered into that Second  Amendment to the Agreement  whereby it amended certain
provisions of the Agreement to (i) expedite the method of accepting transfers of
Limited  Partners'  Units in the  Partnership  and (ii)  provide for an optional
right of  repurchase/redemption  which may be exercised by the Limited Partners;
and

     WHEREAS, on June 30, 1996, Properties merged into Resources; and

     WHEREAS, on July 1st, 1997, Resources as successor via merger to Properties
executed  and entered  into that Third  Amendment  to the  Agreement  whereby it
amended the Agreement to provide that Geodyne Resources,  Inc., as successor via
merger with Properties, is the General Partner of the Partnership; and

                                      -1-
<PAGE>

     WHEREAS,  on December  23, 1999,  Resources  executed and entered into that
certain Fourth  Amendment to the Agreement  whereby the term of the  partnership
was extended for an additional two years, until December 31, 2001, and

     WHEREAS,  Section 2.4 of the Agreement  provides that the Partnership shall
continue in full force and effect until  December 31,  2001,  provided  that the
General Partner may extend the term of the Partnership for up to four periods of
two years each if it believes  each such  extension is in the best  interests of
the  Limited  Partners  or  until  dissolution  prior  thereto  pursuant  to the
provisions of the Agreement, and

     WHEREAS, Resources as General Partner has elected to extend the life of the
Partnership an additional two years.

      NOW,  THEREFORE,  in  consideration  of  the  covenants,   conditions  and
agreements herein contained, the parties hereto hereby agree as follows:

      Section 2.4. is hereby amended and restated as follows:

                  The  Partnership  shall  continue  in force and  effect  until
            December 31, 2003,  provided that the General Partner may extend the
            term of the Partnership for up to three periods of two years each if
            it believes such  extension is in the best  interests of the Limited
            Partners,  or  until  dissolution  prior  thereto  pursuant  to  the
            provisions hereof.

       IN WITNESS  WHEREOF,  the parties hereto have hereunto set their hands as
of the 14th day of November, 2001.

                                       Geodyne Resources, Inc.
                                       as General Partner

                                       By:  /s/ Dennis R. Neill
                                            ---------------------
                                            Dennis R. Neill
                                            President

                                       Geodyne Resources, Inc., as
                                       Attorney-in-Fact for all Substituted
                                       Limited Partners

                                       By:  /s/ Dennis R. Neill
                                            ---------------------
                                            Dennis R. Neill
                                            President

                                      -2-Second Amendment to
                              Amended and Restated
                    Certificate of Limited Partnership of
                Geodyne Energy Income Limited Partnership I-F

      The undersigned,  desiring to amend its amended and restated certificate
of limited  partnership  pursuant  to the  Oklahoma  Revised  Uniform  Limited
Partnership Act, as amended,  Okla.  Stat. tit. 54 (1993),  Section 301 et seq
(the "Act"), do hereby state:

      1.  The  name  of the  limited  partnership  is  Geodyne  Energy  Income
Limited Partnership I-F.

      2. The date of filing of the original Certificate and Agreement of Limited
Partnership  was  September  10,  1986,  as amended by the Amended and  Restated
Certificate of Limited  Partnership of Geodyne Energy Income Limited Partnership
I-F filed on March 10, 1989,  and as further  amended by the First  Amendment to
Amended and Restated Certificate of Limited Partnership of Geodyne Energy Income
Limited Partnership I-F filed on February 25, 1993.

      3.  The Amended  and  Restated  Certificate  of Limited  Partnership  is
hereby revised to change the name of the General Partner and Registered  Agent
from Geodyne Properties, Inc. to the following:

                             Geodyne Resources, Inc.

Geodyne  Properties,  Inc. merged with Geodyne  Resources,  Inc., with Geodyne
Resources, Inc. surviving, effective June 30, 1996.

     DATED:    July 1, 1996
                                        Geodyne Properties, Inc.
                                        by Geodyne Resources,  Inc., successor
                                        by merger

                                        By:  /s/ Dennis R. Neill
                                          --------------------------------
                                          Dennis R. Neill
                                          President

                                        Geodyne Resources, Inc.
                                        as General Partner

                                        By:  /s/ Dennis R. Neill
                                          --------------------------------
                                          Dennis R. Neill
                                          President

                                      -1-
<PAGE>

                                        Geodyne     Resources,     Inc.,    as
                                        Attorney-in-Fact   for   all   Limited
                                        Partners

                                        By:  /s/ Dennis R. Neill
                                          --------------------------------
                                          Dennis R. Neill
                                          President

                                      -2-THIRD AMENDMENT TO
                              AMENDED AND RESTATED
                       CERTIFICATE OF LIMITED PARTNERSHIP
                                       OF
                GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-F

      The undersigned, desiring to amend its Amended and Restated Certificate of
Limited Partnership pursuant to the Oklahoma Revised Uniform Limited Partnership
Act, as amended,  54 O.S. ss.301 et seq.  (Supp.1999)  (the "Act"),  does hereby
state:

      1.    The name of the  limited  partnership  is  Geodyne  Energy  Income
Limited Partnership I-F (the "Partnership").

      2.    The dates of filing the  Certificate  of Limited  Partnership  and
all amendments thereto are as follows:

                        Name                                           Date
                        ----                                           ----

      Agreement and Certificate of Limited Partnership                 3/11/86
      Amended and Restated Agreement and Certificate of                9/11/86
            Limited Partnership
      First Amendment to Amended and Restated Agreement                 2/9/87
            and Certificate of Limited Partnership
      Second Amendment to Amended and Restated Agreement               5/20/87
            and Certificate of Limited Partnership
      Third Amendment to Amended and Restated Agreement                8/24/87
            and Certificate of Limited Partnership
      Fourth Amendment to Amended and Restated Agreement              11/24/87
            and Certificate of Limited Partnership
      Amended and Restated Certificate of Limited                      3/10/89
            Partnership
      First Amendment to Amended and Restated Certificate              2/25/93
            of Limited Partnership
      Second Amendment to Amended and Restated Certificate             7/19/96
            of Limited Partnership

3. The Amended and Restated  Certificate of Limited  Partnership  dated March 9,
1989, and filed with the Oklahoma  Secretary of State on March 10, 1989,  stated
that the latest  date upon  which the  limited  partnership  is to  dissolve  is
December 31, 1999.  Pursuant to its terms, the Amended and Restated  Certificate
and Agreement of Limited  Partnership  dated December 17, 1986 (the "Partnership
Agreement") was amended on December 23, 1999, to state that the latest date upon
which the  Partnership  is to dissolve is December 31, 2001,  provided  that the
General Partner may extend the term of the Partnership for up to four additional
periods  of two  years  each  pursuant  to  the  provisions  of the  Partnership
Agreement.

                                      -1-
<PAGE>

      Therefore,  the Amended and Restated Certificate of Limited Partnership is
hereby  revised  to state that the latest  date on which the  Partnership  is to
dissolve  is  December  31,  2001,  subject  to  extension  as set  forth in the
Partnership's Partnership Agreement.

      Dated:  December 27, 1999.

                                          GEODYNE RESOURCES, INC.
                                          General Partner

                                          By:   /s/ Dennis R. Neill
                                                --------------------------
                                                Dennis R. Neill, President

                                      -2-

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