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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
4,873 4,910 5,387 6,281 6,922 6,882 1977-2009
Adjustments
184 -2 95 -61 -55 188 1977-2009
Revision Increases
777 712 573 532 539 526 1977-2009
Revision Decreases
705 616 639 315 781 1,060 1977-2009
Sales
74 893 128 486 677 46 2000-2009
Acquisitions
345 554 198 894 474 68 2000-2009
Extensions
654 680 826 809 1,362 837 1977-2009
New Field Discoveries
3 0 2 3 353 0 1977-2009
New Reservoir Discoveries in Old Fields
0 0 0 0 0 0 1977-2009
Estimated Production
375 398 450 482 574 553 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