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Crude Oil Proved Reserves, Reserves Changes, and Production
(Million Barrels)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2008 2009 2010 2011 2012 2013 View
History
Proved Reserves as of 12/31
3,388 3,570 3,914 4,438 4,504 4,503 1981-2013
Changes in Reserves During Year
             
Adjustments (+,-)
3 6 -6 -2 -90 -264 1981-2013
Revision Increases (+)
173 576 746 1,831 1,047 544 1981-2013
Revision Decreases (-)
125 143 155 1,328 717 308 1981-2013
Sales (-)
33 15 41 34 180 265 2000-2013
Acquisitions (+)
33 13 92 29 234 210 2000-2013
Extensions (+)
159 153 57 27 112 138 1981-2013
New Field Discoveries (+)
128 34 8 408 7 179 1981-2013
New Reservoir Discoveries in Old Fields (+)
80 52 133 1 20 149 1981-2013
Estimated Production (-)
350 494 490 408 367 384 1981-2013
- = 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 may 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: 12/4/2014
Next Release Date: 12/31/2015