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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
4,910 5,387 6,281 6,922 6,882 7,663 1977-2010
Adjustments
-2 95 -61 -55 188 -172 1977-2010
Revision Increases
712 573 532 539 526 1,252 1977-2010
Revision Decreases
616 639 315 781 1,060 958 1977-2010
Sales
893 128 486 677 46 131 2000-2010
Acquisitions
554 198 894 474 68 96 2000-2010
Extensions
680 826 809 1,362 837 1,263 1977-2010
New Field Discoveries
0 2 3 353 0 0 1977-2010
New Reservoir Discoveries in Old Fields
0 0 0 0 0 0 1977-2010
Estimated Production
398 450 482 574 553 569 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