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Natural Gas Proved Reserves, Wet After Lease Separation
(Billion Cubic Feet)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2012 2013 2014 2015 2016 2017 View
History
Proved Reserves as of Dec. 31
11,726 12,192 12,023 9,846 7,351 15,513 1979-2017
Adjustments
-1,034 269 -310 566 -205 3,889 1979-2017
Revision Increases
2,180 2,185 2,066 1,009 1,662 4,640 1979-2017
Revision Decreases
5,380 1,468 1,229 3,732 2,080 916 1979-2017
Sales
300 449 879 569 1,875 465 2000-2017
Acquisitions
406 598 642 980 851 1,291 2000-2017
Extensions and Discoveries
        86 600 2016-2017
Extensions
1,013 428 587 573 -- -- 1979-2017
New Field Discoveries
0 0 0 0 -- -- 1979-2017
New Reservoir Discoveries in Old Fields
8 8 0 0 -- -- 1979-2017
Estimated Production
1,162 1,105 1,046 1,004 934 877 1979-2017
- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Notes: Miscellaneous States includes Arizona, Florida (2017-present), Idaho, Illinois, Indiana, Maryland, Missouri, Nebraska, Nevada, Oregon, South Dakota, and Tennessee.  See Definitions, Sources, and Notes link above for more information on this table.
Release Date: 11/28/2018
Next Release Date: 11/29/2019