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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
3,852 3,500 3,320 3,388 3,570 3,914 1981-2010
Changes in Reserves During Year
             
Adjustments (+,-)
1 -2 1 3 6 -6 1981-2010
Revision Increases (+)
206 397 335 173 576 746 1981-2010
Revision Decreases (-)
198 520 298 125 143 155 1981-2010
Sales (-)
25 202 212 33 15 41 2000-2010
Acquisitions (+)
23 215 195 33 13 92 2000-2010
Extensions (+)
55 68 111 159 153 57 1981-2010
New Field Discoveries (+)
199 21 4 128 34 8 1981-2010
New Reservoir Discoveries in Old Fields (+)
14 18 56 80 52 133 1981-2010
Estimated Production (-)
342 347 372 350 494 490 1981-2010
- = 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