<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 3RD QUARTER 10-Q AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> 3-MOS 9-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-2000
<PERIOD-END> SEP-30-2000 SEP-30-2000
<CASH> 218,937 218,937
<SECURITIES> 0 0
<RECEIVABLES> 318,731 318,731
<ALLOWANCES> 0 0
<INVENTORY> 0 0
<CURRENT-ASSETS> 537,667 537,667
<PP&E> 13,704,818 13,704,818
<DEPRECIATION> (8,938,723) (8,938,723)
<TOTAL-ASSETS> 5,303,763 5,303,763
<CURRENT-LIABILITIES> 15,450 15,450
<BONDS> 0 0
0 0
0 0
<COMMON> 0 0
<OTHER-SE> 5,288,313 5,288,313
<TOTAL-LIABILITY-AND-EQUITY> 5,303,763 5,303,763
<SALES> 442,255 1,295,316
<TOTAL-REVENUES> 443,340 1,302,919
<CGS> 51,874 155,997
<TOTAL-COSTS> 51,874 155,997
<OTHER-EXPENSES> 274,011 869,518
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 0 0
<INCOME-PRETAX> 117,455 277,404
<INCOME-TAX> 0 0
<INCOME-CONTINUING> 117,455 277,404
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> 117,455 277,404
<EPS-BASIC> 0 0
<EPS-DILUTED> 0 0
</TABLE>