<TABLE> <S> <C>



<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
Consolidated Balance Sheet at March 31, 1999 and 1998 the Consolidated Statement
of Income for the period ending March 31, 1999 and 1998, and is qualified in its
entirety by by reference to such Form 10-Q.
</LEGEND>
<MULTIPLIER> 1000
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   3-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1999             DEC-31-1998             DEC-31-1998
<PERIOD-END>                               MAR-31-1999             MAR-31-1998             DEC-31-1998
<CASH>                                          208500                       0                  121000<F1>
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                   402200                       0                  388400<F1>
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                     281500                       0                  247100<F1>
<CURRENT-ASSETS>                               1002800                       0                  876700<F1>
<PP&E>                                        10684300                       0                10651700<F1>
<DEPRECIATION>                                 6562100                       0                 6498900<F1>
<TOTAL-ASSETS>                                 5542800                       0                 5451300<F1>
<CURRENT-LIABILITIES>                           965200                       0                 1050000<F1>
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                         93400                       0                   93400<F1>
<OTHER-SE>                                     1090000                       0                 1252100<F1>
<TOTAL-LIABILITY-AND-EQUITY>                   5542800                       0                 5451300<F1>
<SALES>                                         485900                  506700<F1>                   0
<TOTAL-REVENUES>                                485900                  506700<F1>                   0
<CGS>                                           225100                  213000<F1>                   0
<TOTAL-COSTS>                                   652900                  500900<F1>                   0
<OTHER-EXPENSES>                               (16400)                 (21600)<F1>                   0
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                               44700                   34800<F1>                   0
<INCOME-PRETAX>                               (150600)                   27400<F1>                   0
<INCOME-TAX>                                   (44100)                   11600<F1>                   0
<INCOME-CONTINUING>                           (106500)                   15800<F1>                   0
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                       (4100)                       0                       0
<NET-INCOME>                                  (110600)                   23800<F1>                   0
<EPS-PRIMARY>                                   (1.28)                     .27<F1>                   0
<EPS-DILUTED>                                   (1.28)                     .27<F1>                   0
<FN>
<F1>Amount restated as the result of the merger with Oryx Energy Company accounted
for using the pooling of interest method of accounting.
</FN>
        


</TABLE>