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Estimated Dry Natural Gas contained in Total Natural Gas Proved Reserves
(Billion Cubic Feet)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2008 2009 2010 2011 2012 2013 View
History
Proved Reserves as of Dec. 31
77,546 80,424 88,997 98,165 86,924 90,349 1981-2013
Adjustments
140 745 985 144 104 880 1981-2013
Revision Increases
8,954 7,936 10,917 19,921 9,246 13,412 1981-2013
Revision Decreases
8,636 9,658 9,252 18,843 25,403 12,498 1981-2013
Sales
3,087 1,852 2,580 20,510 2,774 3,423 2000-2013
Acquisitions
3,442 1,563 3,179 22,546 3,000 3,942 2000-2013
Extensions
11,001 10,260 11,657 12,555 11,911 8,108 1981-2013
New Field Discoveries
472 476 519 69 58 5 1981-2013
New Reservoir Discoveries in Old Fields
178 425 122 425 187 606 1981-2013
Estimated Production
7,009 7,017 6,974 7,139 7,570 7,607 1981-2013
- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Notes: Miscellaneous States includes Arizona, Illinois, Indiana, Maryland, Missouri, Nebraska, Nevada, Oregon, South Dakota, and Tennessee. Estimated Dry Natural Gas is calculated from Total Natural Gas Proved Reserves.  See Definitions, Sources, and Notes link above for more information on this table.
Release Date: 12/4/2014
Next Release Date: 12/31/2015