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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
417 453 479 511 541 1,079 1977-2009
Adjustments
-29 -10 18 12 -7 47 1977-2009
Revision Increases
86 49 70 69 63 243 1977-2009
Revision Decreases
57 27 31 62 75 81 1977-2009
Sales
11 1 53 39 25 2 2000-2009
Acquisitions
22 22 40 43 26 1 2000-2009
Extensions
7 49 30 59 102 401 1977-2009
New Field Discoveries
0 5 1 0 6 6 1977-2009
New Reservoir Discoveries in Old Fields
2 2 3 3 5 5 1977-2009
Estimated Production
51 53 52 53 65 82 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