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Crude Oil Proved Reserves, Reserves Changes, and Production
(Million Barrels)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2005 2006 2007 2008 2009 2010 View
History
Proved Reserves as of 12/31
4,171 3,879 4,163 3,507 3,566 3,722 1977-2010
Changes in Reserves During Year
             
Adjustments (+,-)
-2 1 0 2 0 0 1977-2010
Revision Increases (+)
188 84 487 102 394 397 1977-2010
Revision Decreases (-)
86 235 34 544 152 76 1977-2010
Sales (-)
37 0 9 0 7 0 2000-2010
Acquisitions (+)
37 0 16 0 0 0 2000-2010
Extensions (+)
56 100 40 31 25 30 1977-2010
New Field Discoveries (+)
0 0 45 1 9 0 1977-2010
New Reservoir Discoveries in Old Fields (+)
0 0 0 0 0 0 1977-2010
Estimated Production (-)
312 242 261 248 210 195 1977-2010
- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Notes: Miscellaneous includes Arizona, Missouri, Nevada, New York, South Dakota, Tennessee, and Virginia. The production estimates in this table are based on data reported on Form EIA-23, "Annual Survey of Domestic Oil and Gas Reserves." They many differ from the official Energy Information Administration production data for crude oil contained in the "Petroleum Supply Annual."  See Definitions, Sources, and Notes link above for more information on this table.
Release Date: 8/2/2012
Next Release Date: 8/30/2013