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Dry Natural Gas Proved Reserves
(Billion Cubic Feet)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2003 2004 2005 2006 2007 2008 View
History
Proved Reserves as of Dec. 31
1,126 974 898 975 1,027 985 1977-2008
Adjustments
97 -138 -78 129 138 210 1977-2008
Revision Increases
121 103 166 49 144 135 1977-2008
Revision Decreases
127 64 111 112 198 333 1977-2008
Sales
7 0 54 11 0 31 2000-2008
Acquisitions
0 0 7 83 0 32 2000-2008
Extensions
7 29 58 17 39 23 1977-2008
New Field Discoveries
0 0 5 0 0 1 1977-2008
New Reservoir Discoveries in Old Fields
0 0 7 0 0 0 1977-2008
Estimated Production
82 82 76 78 71 79 1977-2008
- = 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: 10/29/2009
Next Release Date: 10/29/2010