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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
6,523 9,557 12,593 17,205 20,281 22,343 1977-2009
Adjustments
68 93 84 97 -61 96 1977-2009
Revision Increases
1,068 1,216 2,318 3,223 2,689 1,904 1977-2009
Revision Decreases
421 398 683 952 1,013 1,458 1977-2009
Sales
295 347 661 23 651 31 2000-2009
Acquisitions
622 348 804 151 582 277 2000-2009
Extensions
509 2,609 1,953 3,243 3,048 2,992 1977-2009
New Field Discoveries
7 0 4 0 0 0 1977-2009
New Reservoir Discoveries in Old Fields
48 163 0 3 3 0 1977-2009
Estimated Production
490 650 783 1,130 1,521 1,718 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