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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
21,757 20,972 21,317 19,121 20,682 23,267 1899-2010
Changes in Reserves During Year
             
Adjustments (+,-)
221 94 65 278 -4 144 1977-2010
Revision Increases (+)
1,544 1,590 2,278 1,196 2,877 3,429 1977-2010
Revision Decreases (-)
975 1,588 1,078 3,235 1,014 1,570 1977-2010
Sales (-)
823 982 811 312 212 725 2000-2010
Acquisitions (+)
1,101 1,176 792 478 307 1,330 2000-2010
Extensions (+)
805 504 651 805 1,155 1,495 1977-2010
New Field Discoveries (+)
205 30 66 142 122 88 1977-2010
New Reservoir Discoveries in Old Fields (+)
41 43 73 124 81 161 1977-2010
Estimated Production (-)
1,733 1,652 1,691 1,672 1,751 1,767 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