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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
18,201 17,934 17,245 16,285 15,598 15,412 1977-2010
Adjustments
44 91 136 -6 525 -89 1977-2010
Revision Increases
2,071 1,273 2,534 2,735 1,396 2,211 1977-2010
Revision Decreases
2,269 1,203 2,431 2,657 1,708 1,833 1977-2010
Sales
963 6,248 570 402 287 145 2000-2010
Acquisitions
1,238 6,278 376 192 292 419 2000-2010
Extensions
1,048 793 585 520 441 468 1977-2010
New Field Discoveries
10 35 20 0 1 0 1977-2010
New Reservoir Discoveries in Old Fields
3 140 10 7 3 3 1977-2010
Estimated Production
1,493 1,426 1,349 1,349 1,350 1,220 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