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Dry Natural Gas Proved Reserves
(Billion Cubic Feet)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2004 2005 2006 2007 2008 2009 View
History
Proved Reserves as of Dec. 31
184,106 196,214 200,840 225,809 236,957 263,408 1977-2009
Adjustments
-113 1,889 789 1,146 210 5,095 1977-2009
Revision Increases
26,261 22,060 17,980 30,027 30,490 29,548 1977-2009
Revision Decreases
25,942 19,500 22,293 16,601 29,734 32,927 1977-2009
Sales
11,106 9,034 22,850 14,730 7,603 4,104 2000-2009
Acquisitions
12,950 11,576 25,846 15,142 8,498 3,968 2000-2009
Extensions
18,057 20,988 21,729 27,079 26,669 42,137 1977-2009
New Field Discoveries
759 920 409 796 1,170 1,372 1977-2009
New Reservoir Discoveries in Old Fields
1,171 1,198 1,153 1,188 1,617 2,598 1977-2009
Estimated Production
18,690 17,989 18,137 19,078 20,169 21,236 1977-2009
- = 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: 12/30/2010
Next Release Date: 12/30/2011