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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
2,151 2,227 2,469 2,714 2,782 2,613 1977-2010
Adjustments
65 -22 37 81 97 -58 1977-2010
Revision Increases
251 56 62 187 126 103 1977-2010
Revision Decreases
77 21 152 133 760 540 1977-2010
Sales
1 432 4 10 0 0 2000-2010
Acquisitions
0 534 6 13 0 39 2000-2010
Extensions
101 23 373 200 713 383 1977-2010
New Field Discoveries
17 0 0 0 0 0 1977-2010
New Reservoir Discoveries in Old Fields
0 4 0 0 0 0 1977-2010
Estimated Production
85 66 80 93 108 96 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