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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
1,835 1,964 2,269 3,305 5,626 10,869 1977-2009
Adjustments
13 8 -26 -27 -64 5 1977-2009
Revision Increases
200 122 101 321 1,249 1,912 1977-2009
Revision Decreases
91 142 113 146 189 621 1977-2009
Sales
24 31 4 298 19 54 2000-2009
Acquisitions
52 30 5 280 5 36 2000-2009
Extensions
170 281 491 1,148 1,754 4,627 1977-2009
New Field Discoveries
4 4 7 0 0 0 1977-2009
New Reservoir Discoveries in Old Fields
18 31 32 27 41 36 1977-2009
Estimated Production
170 174 188 269 456 698 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