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Crude Oil Proved Reserves, Reserves Changes, and Production
(Million Barrels)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2007 2008 2009 2010 2011 2012 View
History
Proved Reserves as of 12/31
21,317 19,121 20,682 23,267 26,544 30,529 1899-2012
Changes in Reserves During Year
             
Adjustments (+,-)
65 278 -4 144 199 109 1977-2012
Revision Increases (+)
2,278 1,196 2,877 3,429 4,555 4,319 1977-2012
Revision Decreases (-)
1,078 3,235 1,014 1,570 3,230 3,384 1977-2012
Sales (-)
811 312 212 725 808 734 2000-2012
Acquisitions (+)
792 478 307 1,330 1,288 1,150 2000-2012
Extensions (+)
651 805 1,155 1,495 2,571 4,462 1977-2012
New Field Discoveries (+)
66 142 122 88 477 53 1977-2012
New Reservoir Discoveries in Old Fields (+)
73 124 81 161 59 122 1977-2012
Estimated Production (-)
1,691 1,672 1,751 1,767 1,834 2,112 1977-2012
- = 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: 4/10/2014
Next Release Date: 4/30/2015