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Performance Profiles Tables 2006
Table B24.  Oil and Natural Gas Reserve Balances by Region for FRS Companies, 2006
Reserves Statistics Worldwide Total United States Total Foreign
Total Onshore Offshore
Crude Oil and Natural Gas Liquids (million barrels)
    Beginning of Period 30,516 14,717 11,151 3,567 15,799
      Revisions of Previous Estimates   202 -286 -284 -1 487
      Improved Recovery 489 308 242 66 181
      Purchases of Minerals-in-Place  2,251 998 806 192 1,252
      Extensions & Discoveries  998 392 227 165 606
      Production    -2,851 -1,076 -716 -360 -1,776
      Sales of Minerals-in-Place  -1,556 -988 -756 -231 -568
    End of period  30,048 14,067 10,669 3,397 15,981
Proportionate Interest in Investee Reserves -- -- -- -- 8,192
Natural Gas Reserves  (billion cubic feet)
    Beginning of Period 187,474 99,429 87,357 12,071 88,045
      Revisions of Previous Estimates  -3,245 -2,992 -2,606 -385 -253
      Improved Recovery  2,366 1,911 1,887 24 455
      Purchases of Minerals-in-Place  15,527 11,659 10,931 728 3,869
      Extensions & Discoveries 14,072 9,078 8,558 520 4,993
      Production  -14,946 -7,926 -6,409 -1,517 -7,021
      Sales of Minerals-in-Place  -14,460 -9,831 -8,679 -1,152 -4,629
    End of Period  186,787 101,329 91,040 10,289 85,459
Proportionate Interest in Investee Reserves -- -- -- -- 45,411
  See footnotes at end of table.