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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
453 479 511 541 1,079 1,667 1977-2010
Adjustments
-10 18 12 -7 47 -2 1977-2010
Revision Increases
49 70 69 63 243 848 1977-2010
Revision Decreases
27 31 62 75 81 722 1977-2010
Sales
1 53 39 25 2 47 2000-2010
Acquisitions
22 40 43 26 1 136 2000-2010
Extensions
49 30 59 102 401 442 1977-2010
New Field Discoveries
5 1 0 6 6 25 1977-2010
New Reservoir Discoveries in Old Fields
2 3 3 5 5 2 1977-2010
Estimated Production
53 52 53 65 82 94 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