<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> YEAR YEAR
<FISCAL-YEAR-END> DEC-31-1999 DEC-31-2000
<PERIOD-START> JAN-01-1999 JAN-01-2000
<PERIOD-END> DEC-31-1999 JUN-30-2000
<CASH> 18,250 8,195
<SECURITIES> 0 0
<RECEIVABLES> 11,119 23,637
<ALLOWANCES> 0 0
<INVENTORY> 0 0
<CURRENT-ASSETS> 1,048 2,269
<PP&E> 135,982 174,129
<DEPRECIATION> 63,454 83,734
<TOTAL-ASSETS> 107,054 128,844
<CURRENT-LIABILITIES> 16,227 28,792
<BONDS> 0 0
0 0
0 0
<COMMON> 20 20
<OTHER-SE> (2,801) (3,675)
<TOTAL-LIABILITY-AND-EQUITY> 107,054 128,844
<SALES> 42,684 39,171
<TOTAL-REVENUES> 42,684 39,171
<CGS> 0 0
<TOTAL-COSTS> 12,989<F1> 9,224<F1>
<OTHER-EXPENSES> 33,082<F2> 26,149<F2>
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 9,399 5,416
<INCOME-PRETAX> (12,786) (1,348)
<INCOME-TAX> (1,829) 474
<INCOME-CONTINUING> (10,957) (874)
<DISCONTINUED> 0 0
<EXTRAORDINARY> 29,185 0
<CHANGES> 0 0
<NET-INCOME> 18,228 (874)
<EPS-BASIC> 0.91 (0.04)
<EPS-DILUTED> 0.91 (0.04)
<FN>
<F1>Natural gas and oil operating expenses and gas purchased only
<F2>Includes other operating expenses and other income
</FN>
</TABLE>