<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
UNAUDITED FINANCIAL STATEMENT OF ATLAS-ENERGY FOR THE NINETIES PUBLIC #7 LTD.
FINANCIAL DATA STATEMENT FOR 2ND QUARTER 10-Q.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> 3-MOS 6-MOS
<FISCAL-YEAR-END> DEC-31-1999 DEC-31-1999
<PERIOD-START> APR-01-2000 JAN-01-2000
<PERIOD-END> JUN-30-2000 JUN-30-2000
<CASH> 205,880 205,880
<SECURITIES> 0 0
<RECEIVABLES> 301,888 301,888
<ALLOWANCES> 0 0
<INVENTORY> 0 0
<CURRENT-ASSETS> 507,768 507,768
<PP&E> 13,704,818 13,704,818
<DEPRECIATION> (8,752,035) (8,752,035)
<TOTAL-ASSETS> 5,460,551 5,460,551
<CURRENT-LIABILITIES> 17,664 17,664
<BONDS> 0 0
0 0
0 0
<COMMON> 0 0
<OTHER-SE> 5,442,887 5,442,887
<TOTAL-LIABILITY-AND-EQUITY> 5,460,551 5,460,551
<SALES> 413,844 851,867
<TOTAL-REVENUES> 418,902 859,579
<CGS> 49,790 104,123
<TOTAL-COSTS> 49,790 104,123
<OTHER-EXPENSES> 280,021 595,508
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 0 0
<INCOME-PRETAX> 89,091 159,948
<INCOME-TAX> 0 0
<INCOME-CONTINUING> 89,091 159,948
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> 89,091 159,948
<EPS-BASIC> 0 0
<EPS-DILUTED> 0 0
</TABLE>