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Dry Natural Gas Proved Reserves
(Billion Cubic Feet)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2005 2006 2007 2008 2009 2010 View
History
Proved Reserves as of Dec. 31
23,774 23,549 29,710 31,143 35,283 35,074 1977-2010
Adjustments
115 36 -6 27 1,158 521 1977-2010
Revision Increases
2,160 1,339 4,832 5,316 5,281 4,880 1977-2010
Revision Decreases
1,822 2,281 1,818 4,383 3,535 5,540 1977-2010
Sales
139 3,239 337 286 174 1,278 2000-2010
Acquisitions
470 3,372 647 170 54 1,308 2000-2010
Extensions
1,987 2,211 4,666 2,566 3,501 2,117 1977-2010
New Field Discoveries
11 2 2 1 0 1 1977-2010
New Reservoir Discoveries in Old Fields
2 30 0 48 88 0 1977-2010
Estimated Production
1,642 1,695 1,825 2,026 2,233 2,218 1977-2010
- = 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: 8/2/2012
Next Release Date: 8/30/2013