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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
5,122 4,555 5,006 5,674 7,014 9,614 1977-2012
Changes in Reserves During Year
             
Adjustments (+,-)
65 46 -11 -54 107 208 1977-2012
Revision Increases (+)
575 222 544 657 692 1,076 1977-2012
Revision Decreases (-)
241 848 196 315 593 816 1977-2012
Sales (-)
212 104 102 234 286 216 2000-2012
Acquisitions (+)
222 215 189 421 605 464 2000-2012
Extensions (+)
183 238 365 499 1,188 2,418 1977-2012
New Field Discoveries (+)
2 0 1 44 32 23 1977-2012
New Reservoir Discoveries in Old Fields (+)
7 12 4 7 34 57 1977-2012
Estimated Production (-)
350 348 343 357 439 614 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