UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM 8-K/A

                                 Current Report
                       Pursuant to Section 13 or 15(d) of
                           the Securities Act of 1934


Date of Report (Date of earliest event reported): September 25, 2007

      GEODYNE INSTITUTIONAL/PENSION ENERGY INCOME LIMITED PARTNERSHIP P-4
      GEODYNE INSTITUTIONAL/PENSION ENERGY INCOME LIMITED PARTNERSHIP P-6
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             (Exact name of Registrant as specified in its Charter)



   Oklahoma             P-4:  0-18308               P-4: 73-1341929
                        P-6:  0-18937               P-6: 73-1357375
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(State or other          (Commission               (I.R.S. Employer
jurisdiction of          File Number)             Identification No.)
incorporation)

                  Two West Second Street, Tulsa, Oklahoma 74103
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               (Address of principal executive offices) (Zip Code)

Registrant's telephone number, including area code: (918) 583-1791

      Check the  appropriate  box below if the Form 8-K  filing is  intended  to
simultaneously  satisfy the filing obligation of the Registrant under any of the
following provisions:

      [  ]  Written  communications  pursuant to Rule 425 under the Securities
            Act (17 CFR 230.425)
      [  ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act
            (17 CFR 240.14a-12)
      [  ]  Pre-commencement  communications  pursuant to Rule 14d-2(b) under
            the Exchange Act (17 CFR 240.14d-2(b))
      [  ]  Pre-commencement  communications  pursuant to Rule 13e-4(c) under
            the Exchange Act (17 CFR 240.13e-4(c))


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ITEM 9.01.  FINANCIAL STATEMENTS AND EXHIBITS

(B)  General - On  February  5, 2007,  Geodyne  Resources,  Inc.  (the  "General
     Partner")  mailed a notice  to the  limited  partners  announcing  that the
     Geodyne  institutional/Pension  Energy Income Limited  Partnership P-4 (the
     "P-4  Partnership"),  and the Geodyne  Institutional/Pension  Energy Income
     Limited  Partnership  P-6  (the  "P-6  Partnership")   (collectively,   the
     "Partnerships")  will terminate at the end of their current term,  December
     31, 2007.  Consequently,  the Partnerships adopted the liquidation basis of
     accounting  effective February 5, 2007. The liquidation basis of accounting
     reports the net assets of the  Partnerships at their net realizable  value.
     Adjustments were made to reduce all balance sheet categories into one line,
     "net assets of Partnership in liquidation", which is an estimate of the net
     fair  value of all  Partnership  assets  and  liabilities.  Cash,  accounts
     receivable,  and  accounts  payable were valued at their  historical  cost,
     which  approximates fair value. Oil and gas properties were valued at their
     estimated net sales price,  which was estimated  utilizing  discounted cash
     flows based on strip  pricing as of June 30, 2007 at a discount rate of 10%
     for  proved  developed  producing   reserves,   18%  for  proved  developed
     non-producing   reserves  and  20%  for  proved  undeveloped  reserves.  An
     adjustment  was made to the  discounted  cash flows for the  effects of gas
     balancing and asset  retirement  obligations.  A provision was also made to
     account for direct  expenses  that will be incurred  related to the sale of
     the  oil  and  gas  properties.  The  allocation  of  the  "net  assets  of
     Partnership in liquidation" to the General Partner and limited partners was
     calculated using the current  allocation of income and expenses,  which may
     change  if a  Partnership's  distributions  from  the  commencement  of the
     property  investment period reach a yearly average equal to at least 12% of
     the limited partners  subscriptions.  The adoption of the liquidation basis
     of  accounting  on  February  5,  2007  resulted  in  an  increase  in  the
     Partnerships' net assets as follows, at June 30, 2007:

                              P-4  $ 5,130,225
                              P-6   10,489,733

     Pro forma unaudited  financial  information - A limited number of pro forma
     adjustments  are required to  illustrate  the effects of the  September 12,
     2007 Oil and Gas  Clearinghouse  auction (the  "September  Auction") on the
     Combined Unaudited  Statements of Net Assets of Partnership in Liquidation,
     Combined  Unaudited  Statements of Changes in Net Assets of  Partnership in
     Liquidation, and Combined Unaudited Statements of Operations. The following
     narrative  description  is furnished  in lieu of the pro forma  statements,
     assuming the properties were sold on January 1, 2006.

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     (1)  P-4 Partnership

          (a)  September 2007 Auction

               The P-4 Partnership's net fair value of its Net Profits Interests
               sold in the  September  Auction was $230,267 as of June 30, 2007.
               The net sales proceeds were approximately $185,000.

               For the six months  ended June 30,  2007,  the P-4  Partnership's
               total revenues and operating  expenses would have been reduced by
               $16,443 and $439,  respectively.  Under  liquidation  accounting,
               discontinued  operations  are no longer  presented.  Revenues and
               expenses  for the six months ended June 30, 2007 include all sold
               properties. Revenues and expenses for the year ended December 31,
               2006 include only the sold  properties  classified  as continuing
               operations at December 31, 2006.

               For the year ended December 31, 2006, the P-4  Partnership's  Net
               Income  from  Continuing   Operations  would  have  decreased  by
               $47,463,  representing a reduction in Net Profits  (including oil
               and gas sales net of operating  expenses) of $49,355, a reduction
               in depletion of Net Profits Interests of $1,342,  and a reduction
               in accretion of the asset retirement obligation of $550.

          (b)  Cumulative Effect

               The  paragraphs  below  give  effect  to the  sale  of  producing
               properties  at the  September  Auction and the July 2007  auction
               described  in  previous  8-K  filings.  The  following  narrative
               description  is  furnished  in lieu of the pro forma  statements,
               assuming the properties were sold on January 1, 2006.

               For the six months  ended June 30,  2007,  the P-4  Partnership's
               total revenues and operating  expenses would have been reduced by
               $180,296 and $2,460 respectively.  Under liquidation  accounting,
               discontinued  operations  are no longer  presented.  Revenues and
               expenses  for the six months ended June 30, 2007 include all sold
               properties. Revenues and expenses for the year ended December 31,
               2006 include only the sold  properties  classified  as continuing
               operations at December 31, 2006.

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               For the year ended December 31, 2006, the P-4  Partnership's  Net
               Income  from  Continuing   Operations  would  have  decreased  by
               $415,181,  representing a reduction in Net Profits (including oil
               and gas sales net of operating expenses) of $440,520, a reduction
               in depletion of Net Profits Interests of $22,412, and a reduction
               in accretion of the asset retirement obligation of $2,927.

     (2)  P-6 Partnership

          (a)  September 2007 Auction

               The P-6 Partnership's net fair value of its Net Profits Interests
               sold in the September Auction was $1,175,320 as of June 30, 2007.
               The net sales proceeds were approximately $897,000.

               For the six months  ended June 30,  2007,  the P-6  Partnership's
               total revenues and operating  expenses would have been reduced by
               $9,770 and $3,893,  respectively.  Under liquidation  accounting,
               discontinued  operations  are no longer  presented.  Revenues and
               expenses  for the six months ended June 30, 2007 include all sold
               properties. Revenues and expenses for the year ended December 31,
               2006 include only the sold  properties  classified  as continuing
               operations at December 31, 2006.

               For the year ended December 31, 2006, the P-6  Partnership's  Net
               Income  from  Continuing   Operations  would  have  decreased  by
               $129,429,  representing a reduction in Net Profits (including oil
               and gas sales net of operating expenses) of $153,425, a reduction
               in depletion of Net Profits Interests of $17,714, and a reduction
               in accretion of the asset retirement obligation of $6,282.

          (b)  Cumulative Effect

               The  paragraphs  below  give  effect  to the  sale  of  producing
               properties  at the  September  Auction,  the July and August 2007
               auctions   described   in  previous   8-K   filings,   and  other
               miscellaneous  property  sales  that  occurred  in May 2007.  The
               following  narrative  description is furnished in lieu of the pro
               forma statements, assuming the properties were sold on January 1,
               2006.

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               For the six months  ended June 30,  2007,  the P-6  Partnership's
               total revenues and operating  expenses would have been reduced by
               $406,688 and $13,797 respectively.  Under liquidation accounting,
               discontinued  operations  are no longer  presented.  Revenues and
               expenses  for the six months ended June 30, 2007 include all sold
               properties. Revenues and expenses for the year ended December 31,
               2006 include only the sold  properties  classified  as continuing
               operations at December 31, 2006.

               For the year ended December 31, 2006, the P-6  Partnership's  Net
               Income  from  Continuing   Operations  would  have  decreased  by
               $744,293,  representing a reduction in Net Profits (including oil
               and  gas  sales  net of  operating  expenses)  of  $1,001,341,  a
               reduction in depletion of Net Profits Interests of $245,622,  and
               a reduction in accretion of the asset  retirement  obligation  of
               $11,426.


                                   SIGNATURES

      Pursuant to the  requirements of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                    GEODYNE INSTITUTIONAL/PENSION ENERGY INCOME
                                        LIMITED PARTNERSHIP P-4
                                    GEODYNE INSTITUTIONAL/PENSION ENERGY INCOME
                                        LIMITED PARTNERSHIP P-6

                                    By:  GEODYNE RESOURCES, INC.
                                         General Partner

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

DATE: October 3, 2007


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