<ARTICLE> 5 <CIK> 0000850506 <NAME> GEODYNE ENERGY INCOME LTD. PARTNERSHIP II-F <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> SEP-30-1997 <CASH> 357,481 <SECURITIES> 0 <RECEIVABLES> 368,587 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 726,068 <PP&E> 12,076,998 <DEPRECIATION> 9,549,714 <TOTAL-ASSETS> 3,325,055 <CURRENT-LIABILITIES> 56,052 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 3,240,681 <TOTAL-LIABILITY-AND-EQUITY> 3,325,055 <SALES> 1,674,566 <TOTAL-REVENUES> 1,859,021 <CGS> 0 <TOTAL-COSTS> 2,200,028 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> (341,007) <INCOME-TAX> 0 <INCOME-CONTINUING> (341,007) <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> (341,007) <EPS-PRIMARY> (2.28) <EPS-DILUTED> 0