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Annual Energy Review

Release Date: October 19, 2011 
Next Update: August 2012

Table 4.2  Crude Oil and Natural Gas Cumulative Production, Proved Reserves, and Estimated Ultimate Recovery,
                  1977-2009

Year		 Crude Oil and Lease Condensate 1 Natural Gas (Dry)
Cumulative Production Proved Reserves 2 Estimated Ultimate Recovery 3 Cumulative Production Proved Reserves 4 Estimated Ultimate Recovery 3
  Billion Barrels Trillion Cubic Feet
1977
 118.1 31.8 149.9 514.4 207.4 721.9
1978
 121.3 31.4 152.6 533.6 208.0 741.6
1979
 124.4 31.2 155.6 553.2 201.0 754.2
1980
 127.5 31.3 158.9 572.6 199.0 771.6
1981
 130.7 31.0 161.7 591.8 201.7 793.5
1982
 133.8 29.5 163.3 609.6 201.5 811.1
1983
 137.0 29.3 166.3 625.7 200.2 826.0
1984
 140.2 30.0 170.2 643.2 197.5 840.7
1985
 143.5 29.9 173.4 659.6 193.4 853.0
1986
 146.7 28.3 175.0 675.7 191.6 867.3
1987
 149.7 28.7 178.4 692.3 187.2 879.5
1988
 152.7 28.2 180.9 709.4 168.0 877.4
1989
 155.5 27.9 183.4 726.7 167.1 893.9
1990
 158.2 27.6 185.7 744.5 169.3 913.9
1991
 160.9 25.9 186.8 762.2 167.1 929.3
1992
 163.5 25.0 188.5 780.1 165.0 945.1
1993
 166.0 24.1 190.2 798.2 162.4 960.6
1994
 168.4 23.6 192.0 817.0 163.8 980.8
1995
 170.8 23.5 194.4 835.6 165.1 1,000.7
1996
 173.2 23.3 196.5 854.5 166.5 1,020.9
1997
 175.6 23.9 199.4 873.4 167.2 1,040.6
1998
 177.8 22.4 200.2 892.4 164.0 1,056.4
1999
 180.0 23.2 203.1 911.2 167.4 1,078.6
2000
 182.1 23.5 205.6 930.4 177.4 1,107.8
2001
 184.2 23.8 208.1 950.0 183.5 1,133.5
2002
 186.3 24.0 210.4 968.9 186.9 1,155.9
2003
 188.4 23.1 211.5 988.0 189.0 1,177.1
2004
 190.4 22.6 213.0 1,006.6 192.5 1,199.1
2005
 192.3 23.0 215.3 R 1,024.7 204.4 R 1,229.1
2006
 194.1 R 22.3 R 216.4 R 1,043.2 211.1 R 1,254.3
2007
 R 196.0 22.8 R 218.8 R 1,062.4 237.7 R 1,300.2
2008
 R 197.8 20.6 R 218.3 R 1,082.6 244.7 R 1,327.3
2009
 199.8 22.3 222.1 1,103.2 272.5 1,375.7
1Lease condensate is the portion of natural gas liquids that is separated from the wellhead gas stream
at a lease or field separation facility.		 R=Revised.  
2See "Proved Reserves, Crude Oil" and "Proved Reserves, Lease Condensate" in Glossary. Note:  Data are at end of year.
3"Estimated ultimate recovery" (EUR) is the sum of the estimate of proved reserves at a specific time
and cumulative production up to that time.		 Web Pages:  See http://www.eia.gov/petroleum/ and http://www.eia.gov/naturalgas/ for related
information.
4See "Proved Reserves, Natural Gas" in Glossary. Sources:  Cumulative Production:  Calculated from U.S. Energy Information Administration (EIA),
Petroleum Supply Annual, annual reports and Natural Gas Annual, annual reports.  Proved Reserves:
·  1977-2000—EIA, U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Reserves, annual reports.
·  2001-2009—EIA, Summary: U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Proved Reserves
2009 (November 2010), Table 7.  Estimated Ultimate Recovery:  Calculated as the sum of cumulative
production and proved reserves.