EXHIBIT 99.1


                         GEODYNE ENERGY INCOME PROGRAMS
            1999 YEAR-END ESTIMATED VALUATION ON A PER UNIT BASIS(1)


                                                                            CASH DISTRIBUTIONS PER UNIT
                                     1999 YEAR            1998          ------------------------------------
                                    END PER UNIT        YEAR-END                     CUMULATIVE
           FORMATION    UNIT         ESTIMATED         ESTIMATED        1999        DISTRIBUTIONS
P/SHIP       DATE       SIZE        VALUATION(2)      VALUATION(2)      TOTAL        THRU 12/31/99    P/SHIP
- ------     ---------    ----        ------------      ------------      -----       --------------    ------

                                                                                 
III-A      11/21/89       $100         $23.41           $20.06          $3.30         $ 98.64         III-A
III-B      01/24/90        100          23.84            17.13           3.27          109.26         III-B
III-C      02/27/90        100          27.64            22.39           4.99           75.41         III-C
III-D      09/05/90        100          39.93            21.06           5.88           70.99         III-D
III-E      12/26/90        100          50.34            16.32           2.62           74.87         III-E
III-F      03/08/91        100          31.58            18.76           2.23           52.48         III-F
III-G      09/20/91        100          35.59            18.92           2.49           50.45         III-G

(1)   This chart must be read in  connection  with the letter dated  January 28,
      2000,  providing  important  assumptions  and  other  information  on  the
      methodology used to calculate these estimates.
(2)   1999  Year-End  estimates  use  $22.75  per  barrel  of oil and  $2.24 per
      thousand  cubic feet ("MCF") of gas compared to $9.50 per barrel and $2.03
      per MCF of gas for the 1998 Year-End estimates.