Exhibit 32.3

                                CERTIFICATION
                     PURSUANT TO 18 U.S.C. SECTION 1350,
                  AS ADOPTED PURSUANT TO SECTION 906 OF THE
                          SARBANES-OXLEY ACT OF 2002


      The undersigned hereby certify,  pursuant to 18 U.S.C.  Section 1350, as
adopted  pursuant to Section 906 of the  Sarbanes-Oxley  Act of 2002, that, to
the  undersigned's  best knowledge and belief,  the Annual Report on Form 10-K
for the Geodyne  Institutional/Pension  Energy Income Limited  Partnership P-4
("Issuer")  for the  period  ending  December  31,  2006  as  filed  with  the
Securities and Exchange Commission on the date hereof (the "Report"):

      (a)   fully complies with the  requirements of section 13(a) or 15(d) of
            the Securities Exchange Act of 1934; and

      (b)   the information  contained in the Report fairly  presents,  in all
            material  respects,   the  financial   condition  and  results  of
            operations of the Issuer.

      Dated this 16th day of April, 2007.

                                GEODYNE INSTITUTIONAL/PENSON ENERGY
                                INCOME LIMITED PARTNERSHIP P-4
                                ("Issuer")

                                //s// Dennis R. Neill
                                -----------------------------------
                                Dennis R. Neill
                                President (Chief Executive Officer)

                                //s// Craig D. Loseke
                                -----------------------------------
                                Craig D. Loseke
                                Chief Accounting Officer
                                (Chief Financial Officer)