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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
1,184 1,161 1,063 1,040 985 1,398 1977-2009
Adjustments
57 25 77 -18 99 -22 1977-2009
Revision Increases
111 70 36 71 41 105 1977-2009
Revision Decreases
128 130 182 110 145 104 1977-2009
Sales
82 62 0 180 5 35 2000-2009
Acquisitions
91 76 4 238 11 50 2000-2009
Extensions
92 115 74 68 26 143 1977-2009
New Field Discoveries
100 0 2 0 3 358 1977-2009
New Reservoir Discoveries in Old Fields
1 11 0 0 0 0 1977-2009
Estimated Production
120 128 109 92 85 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