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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
22,632 23,774 23,549 29,710 31,143 35,283 1977-2009
Adjustments
50 115 36 -6 27 1,158 1977-2009
Revision Increases
2,853 2,160 1,339 4,832 5,316 5,281 1977-2009
Revision Decreases
3,586 1,822 2,281 1,818 4,383 3,535 1977-2009
Sales
865 139 3,239 337 286 174 2000-2009
Acquisitions
811 470 3,372 647 170 54 2000-2009
Extensions
3,105 1,987 2,211 4,666 2,566 3,501 1977-2009
New Field Discoveries
8 11 2 2 1 0 1977-2009
New Reservoir Discoveries in Old Fields
36 2 30 0 48 88 1977-2009
Estimated Production
1,524 1,642 1,695 1,825 2,026 2,233 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: 6/15/2012