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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
382 418 424 378 898 701 1981-2009
Adjustments
-59 29 -22 12 4 -7 1981-2009
Revision Increases
112 54 62 86 240 80 1981-2009
Revision Decreases
131 43 51 93 82 207 1981-2009
Sales
66 32 55 63 16 0 2000-2009
Acquisitions
61 29 26 51 5 4 2000-2009
Extensions
27 29 79 18 22 14 1981-2009
New Field Discoveries
4 0 17 0 0 0 1981-2009
New Reservoir Discoveries in Old Fields
27 38 33 29 442 2 1981-2009
Estimated Production
99 68 83 86 95 83 1981-2009
- = 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