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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
189 268 206 205 146 163 1977-2009
Adjustments
-3 72 -62 3 0 2 1977-2009
Revision Increases
32 31 28 32 21 41 1977-2009
Revision Decreases
9 13 12 26 69 14 1977-2009
Sales
3 0 70 4 6 0 2000-2009
Acquisitions
7 1 58 6 6 0 2000-2009
Extensions
8 6 5 0 0 0 1977-2009
New Field Discoveries
0 0 0 0 0 0 1977-2009
New Reservoir Discoveries in Old Fields
0 0 0 0 0 0 1977-2009
Estimated Production
10 18 9 12 11 12 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