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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
986 1,057 1,052 1,000 976 944 1977-2010
Adjustments
3 13 9 -3 135 -19 1977-2010
Revision Increases
63 65 92 41 132 103 1977-2010
Revision Decreases
122 78 74 56 210 100 1977-2010
Sales
6 20 41 90 3 40 2000-2010
Acquisitions
9 17 39 95 3 30 2000-2010
Extensions
130 144 81 75 32 86 1977-2010
New Field Discoveries
0 19 0 0 0 0 1977-2010
New Reservoir Discoveries in Old Fields
14 28 1 0 0 1 1977-2010
Estimated Production
100 117 112 114 113 93 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