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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
8,407 8,171 10,245 11,917 7,699 9,101 1977-2009
Adjustments
-1 -2 -46 1 -3 3 1977-2009
Revision Increases
632 293 2,853 2,147 184 1,868 1977-2009
Revision Decreases
207 154 376 112 4,068 108 1977-2009
Sales
0 96 0 10 0 5 2000-2009
Acquisitions
0 98 0 6 0 0 2000-2009
Extensions
141 62 49 28 18 2 1977-2009
New Field Discoveries
0 22 0 0 0 0 1977-2009
New Reservoir Discoveries in Old Fields
35 10 2 0 5 0 1977-2009
Estimated Production
478 469 408 388 354 358 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