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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
4,295 5,146 6,391 6,643 7,257 6,981 1977-2010
Adjustments
65 -11 17 -4 1 -80 1977-2010
Revision Increases
186 218 1,113 379 1,342 872 1977-2010
Revision Decreases
112 502 325 564 491 219 1977-2010
Sales
6 1,147 484 258 92 530 2000-2010
Acquisitions
0 1,189 541 251 133 7 2000-2010
Extensions
596 1,408 744 801 164 106 1977-2010
New Field Discoveries
4 45 4 64 0 0 1977-2010
New Reservoir Discoveries in Old Fields
4 0 0 0 4 0 1977-2010
Estimated Production
308 349 365 417 447 432 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