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Natural Gas Proved Reserves, Wet After Lease Separation
(Billion Cubic Feet)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2007 2008 2009 2010 2011 2012 View
History
Proved Reserves as of Dec. 31
247,789 255,035 283,879 317,647 348,809 322,670 1979-2012
Adjustments
990 271 5,923 1,292 2,715 -810 1979-2012
Revision Increases
33,404 31,941 32,664 42,394 56,015 42,505 1979-2012
Revision Decreases
17,468 35,195 34,563 38,339 56,127 88,119 1979-2012
Sales
15,518 7,911 4,377 10,582 44,575 9,950 2000-2012
Acquisitions
15,970 8,848 4,155 13,348 47,873 8,091 2000-2012
Extensions
28,255 27,800 43,500 46,283 47,635 47,053 1979-2012
New Field Discoveries
814 1,229 1,423 895 987 780 1979-2012
New Reservoir Discoveries in Old Fields
1,244 1,678 2,656 1,701 1,260 408 1979-2012
Estimated Production
20,318 21,415 22,537 23,224 24,621 26,097 1979-2012
- = 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.  See Definitions, Sources, and Notes link above for more information on this table.
Release Date: 4/10/2014
Next Release Date: 4/30/2015