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Crude Oil Proved Reserves, Reserves Changes, and Production
(Million Barrels)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2014 2015 2016 2017 2018 2019 View
History
Proved Reserves as of 12/31
36,385 32,318 32,773 39,160 43,824 44,191 1899-2019
Changes in Reserves During Year
             
Adjustments (+,-)
516 1,155 262 822 551 -573 1977-2019
Revision Increases (+)
5,315 4,192 5,224 5,504 4,290 3,729 1977-2019
Revision Decreases (-)
4,994 9,092 5,207 2,887 3,683 5,608 1977-2019
Sales (-)
2,157 885 1,125 1,135 1,237 1,833 2000-2019
Acquisitions (+)
2,420 798 1,460 2,135 1,872 2,743 2000-2019
Extensions and Discoveries (+)
    2,794 5,105 6,567 6,078 2016-2019
Extensions (+)
4,430 2,811 -- -- -- -- 1977-2019
New Field Discoveries (+)
151 20 -- -- -- -- 1977-2019
New Reservoir Discoveries in Old Fields (+)
207 38 -- -- -- -- 1977-2019
Estimated Production (-)
2,874 3,104 2,953 3,157 3,696 4,169 1977-2019
- = 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: 1/11/2021
Next Release Date: 12/20/2021