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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
16,596 17,149 21,851 23,302 23,058 24,119 1977-2010
Adjustments
57 52 136 -250 306 449 1977-2010
Revision Increases
2,018 1,178 3,924 3,244 1,601 2,973 1977-2010
Revision Decreases
1,478 1,524 582 3,029 4,044 3,645 1977-2010
Sales
1,238 1,539 750 747 374 242 2000-2010
Acquisitions
1,767 1,540 450 1,346 437 229 2000-2010
Extensions
1,795 1,980 2,812 2,294 3,346 2,838 1977-2010
New Field Discoveries
32 14 15 17 8 22 1977-2010
New Reservoir Discoveries in Old Fields
4 26 23 17 0 27 1977-2010
Estimated Production
1,104 1,174 1,326 1,441 1,524 1,590 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