EXHIBIT 99.1


                         GEODYNE ENERGY INCOME PROGRAMS
            2000 YEAR-END ESTIMATED VALUATION ON A PER UNIT BASIS(1)


                                                                            CASH DISTRIBUTIONS PER UNIT
                                     2000 YEAR            1999          ------------------------------------
                                    END PER UNIT        YEAR-END                     CUMULATIVE
           FORMATION    UNIT         ESTIMATED         ESTIMATED        2000        DISTRIBUTIONS
P/SHIP       DATE       SIZE        VALUATION(2)      VALUATION(2)      TOTAL        THRU 12/31/00    P/SHIP
- ------     ---------    ----        ------------      ------------      -----       --------------    ------

                                                                                 
III-A      11/21/89     $100           $64.35           $23.41          $6.42         $105.60         III-A
III-B      01/24/90     $100           $60.01           $23.84          $7.33         $116.59         III-B
III-C      02/27/90     $100           $73.36           $27.64          $8.44         $83.85          III-C
III-D      09/05/90     $100           $91.64           $39.93          $13.22        $84.21          III-D
III-E      12/26/90     $100           $96.11           $50.34          $15.73        $90.60          III-E
III-F      03/08/91     $100           $79.72           $31.58          $9.59         $62.07          III-F
III-G      09/20/91     $100           $82.18           $35.59          $10.93        $61.38          III-G



(1)   This chart must be read in  connection  with the letter dated  January 26,
      2001,  providing  important  assumptions  and  other  information  on  the
      methodology used to calculate these estimates.
(2)   2000  Year-End  estimates  use  $27.52  per  barrel  of oil and  $6.03 per
      thousand  cubic feet ("MCF") of gas compared to $22.75 per barrel and $2.24
      per MCF of gas for the 1999 Year-End estimates.