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Crude Oil Proved Reserves, Reserves Changes, and Production
(Million Barrels)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2013 2014 2015 2016 2017 2018 View
History
Proved Reserves as of 12/31
33,371 36,385 32,318 32,773 39,160 43,824 1899-2018
Changes in Reserves During Year
             
Adjustments (+,-)
-620 516 1,155 262 822 551 1977-2018
Revision Increases (+)
4,030 5,315 4,192 5,224 5,504 4,290 1977-2018
Revision Decreases (-)
3,512 4,994 9,092 5,207 2,887 3,683 1977-2018
Sales (-)
1,327 2,157 885 1,125 1,135 1,237 2000-2018
Acquisitions (+)
1,787 2,420 798 1,460 2,135 1,872 2000-2018
Extensions and Discoveries (+)
      2,794 5,105 6,567 2016-2018
Extensions (+)
4,395 4,430 2,811 -- -- -- 1977-2018
New Field Discoveries (+)
188 151 20 -- -- -- 1977-2018
New Reservoir Discoveries in Old Fields (+)
319 207 38 -- -- -- 1977-2018
Estimated Production (-)
2,418 2,874 3,104 2,953 3,157 3,696 1977-2018
- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Notes: W -- Individual state volumes are withheld to avoid disclosure of operator-level reserves data, due to statistical precision requirements, or due to other data quality reasons. The individual state volumes are included in the U.S. Total volume. The volumes in the table above are crude oil ONLY (aka Black Oil), excluding lease condensate. The production estimates in this table are based on data reported on Form EIA-23L, "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: 12/12/2019
Next Release Date: 11/20/2020