<ARTICLE>                           5
<CIK>                               0000888239
<NAME>                              GEODYNE INST/PEN ENERGY INCOME LTD PSHIP P-8

                                 
<PERIOD-TYPE>                       9-MOS
<FISCAL-YEAR-END>                   DEC-31-1999
<PERIOD-START>                      JAN-01-1999
<PERIOD-END>                        SEP-30-1999
<CASH>                                     275,172
<SECURITIES>                                     0
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<CURRENT-ASSETS>                           544,919
<PP&E>                                   8,737,153
<DEPRECIATION>                           7,493,270
<TOTAL-ASSETS>                           1,788,802
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<OTHER-SE>                               1,788,802
<TOTAL-LIABILITY-AND-EQUITY>             1,788,802
<SALES>                                    698,140
<TOTAL-REVENUES>                           702,918
<CGS>                                            0
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<OTHER-EXPENSES>                                 0
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<DISCONTINUED>                                   0
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<EPS-BASIC>                                 3.30
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