<ARTICLE> 5 <CIK> 0000850427 <NAME> GEODYNE INSTIT/PENS ENERGY INCOME P-1 LTD PSHP <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-2000 <PERIOD-START> JAN-01-2000 <PERIOD-END> JUN-30-2000 <CASH> 208,577 <SECURITIES> 0 <RECEIVABLES> 249,221 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 457,798 <PP&E> 6,818,908 <DEPRECIATION> 5,880,811 <TOTAL-ASSETS> 1,395,895 <CURRENT-LIABILITIES> 0 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 1,395,895 <TOTAL-LIABILITY-AND-EQUITY> 1,395,895 <SALES> 583,666 <TOTAL-REVENUES> 600,954 <CGS> 0 <TOTAL-COSTS> 142,848 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 458,106 <INCOME-TAX> 0 <INCOME-CONTINUING> 458,106 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 458,106 <EPS-BASIC> 3.76 <EPS-DILUTED> 0