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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
236,957 263,408 295,787 324,643 298,457 330,948 1977-2013
Adjustments
210 5,095 508 1,732 -1,586 548 1977-2013
Revision Increases
30,490 29,548 39,899 52,673 39,831 47,021 1977-2013
Revision Decreases
29,734 32,927 36,119 53,267 84,280 42,061 1977-2013
Sales
7,603 4,104 10,022 43,150 9,316 9,467 2000-2013
Acquisitions
8,498 3,968 12,748 46,020 7,518 10,538 2000-2013
Extensions
26,669 42,137 44,769 45,905 45,122 49,039 1977-2013
New Field Discoveries
1,170 1,372 850 947 762 256 1977-2013
New Reservoir Discoveries in Old Fields
1,617 2,598 1,668 1,224 376 1,565 1977-2013
Estimated Production
20,169 21,236 21,922 23,228 24,613 24,948 1977-2013
- = 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