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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
4,668 5,123 5,126 5,341 4,946 4,827 1977-2009
Adjustments
-21 79 25 -65 49 29 1977-2009
Revision Increases
829 404 170 351 199 355 1977-2009
Revision Decreases
458 487 634 185 690 447 1977-2009
Sales
271 276 111 1,783 136 90 2000-2009
Acquisitions
293 283 231 1,891 264 97 2000-2009
Extensions
316 793 691 349 260 263 1977-2009
New Field Discoveries
0 8 0 0 0 0 1977-2009
New Reservoir Discoveries in Old Fields
1 0 0 3 1 2 1977-2009
Estimated Production
348 349 369 346 342 328 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