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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
5,123 5,126 5,341 4,946 4,827 4,787 1977-2010
Adjustments
79 25 -65 49 29 68 1977-2010
Revision Increases
404 170 351 199 355 535 1977-2010
Revision Decreases
487 634 185 690 447 710 1977-2010
Sales
276 111 1,783 136 90 575 2000-2010
Acquisitions
283 231 1,891 264 97 451 2000-2010
Extensions
793 691 349 260 263 496 1977-2010
New Field Discoveries
8 0 0 0 0 0 1977-2010
New Reservoir Discoveries in Old Fields
0 0 3 1 2 10 1977-2010
Estimated Production
349 369 346 342 328 315 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