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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
110 131 138 239 270 349 1977-2009
Adjustments
-2 24 -6 1 -13 69 1977-2009
Revision Increases
7 8 11 12 41 65 1977-2009
Revision Decreases
42 18 18 14 37 119 1977-2009
Sales
2 0 4 18 10 0 2000-2009
Acquisitions
2 0 6 31 21 0 2000-2009
Extensions
17 12 28 57 41 94 1977-2009
New Field Discoveries
4 13 0 38 8 0 1977-2009
New Reservoir Discoveries in Old Fields
0 0 0 8 0 0 1977-2009
Estimated Production
8 18 10 14 20 30 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: 6/15/2012