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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
995 986 1,057 1,052 1,000 976 1977-2009
Adjustments
-56 3 13 9 -3 135 1977-2009
Revision Increases
73 63 65 92 41 132 1977-2009
Revision Decreases
124 122 78 74 56 210 1977-2009
Sales
3 6 20 41 90 3 2000-2009
Acquisitions
3 9 17 39 95 3 2000-2009
Extensions
131 130 144 81 75 32 1977-2009
New Field Discoveries
1 0 19 0 0 0 1977-2009
New Reservoir Discoveries in Old Fields
6 14 28 1 0 0 1977-2009
Estimated Production
95 100 117 112 114 113 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