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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
1,161 1,063 1,040 985 1,398 2,399 1977-2010
Adjustments
25 77 -18 99 -22 -95 1977-2010
Revision Increases
70 36 71 41 105 424 1977-2010
Revision Decreases
130 182 110 145 104 320 1977-2010
Sales
62 0 180 5 35 466 2000-2010
Acquisitions
76 4 238 11 50 416 2000-2010
Extensions
115 74 68 26 143 1,023 1977-2010
New Field Discoveries
0 2 0 3 358 117 1977-2010
New Reservoir Discoveries in Old Fields
11 0 0 0 0 15 1977-2010
Estimated Production
128 109 92 85 82 113 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