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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
898 975 1,027 985 896 832 1977-2010
Adjustments
-78 129 138 210 70 127 1977-2010
Revision Increases
166 49 144 135 70 68 1977-2010
Revision Decreases
111 112 198 333 43 59 1977-2010
Sales
54 11 0 31 196 374 2000-2010
Acquisitions
7 83 0 32 79 239 2000-2010
Extensions
58 17 39 23 10 8 1977-2010
New Field Discoveries
5 0 0 1 0 0 1977-2010
New Reservoir Discoveries in Old Fields
7 0 0 0 0 0 1977-2010
Estimated Production
76 78 71 79 79 73 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