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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
244,656 272,509 304,625 334,067 308,036 338,264 1925-2013
Adjustments
207 5,098 509 1,731 -1,588 543 1977-2013
Revision Increases
30,674 31,416 40,521 53,601 40,583 47,174 1977-2013
Revision Decreases
33,802 33,035 36,571 53,473 84,619 44,461 1977-2013
Sales
7,603 4,109 10,153 43,186 9,318 9,558 2000-2013
Acquisitions
8,498 3,968 12,748 46,241 7,518 10,810 2000-2013
Extensions
26,687 42,139 44,783 45,909 45,167 49,131 1977-2013
New Field Discoveries
1,170 1,372 850 947 762 256 1977-2013
New Reservoir Discoveries in Old Fields
1,622 2,598 1,668 1,227 376 1,566 1977-2013
Estimated Production
20,523 21,594 22,239 23,555 24,912 25,233 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