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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
2,185 2,694 2,345 2,309 2,128 2,469 1977-2009
Adjustments
26 5 -12 31 -8 2 1977-2009
Revision Increases
389 685 112 296 239 180 1977-2009
Revision Decreases
94 96 371 217 327 148 1977-2009
Sales
123 200 169 158 1 4 2000-2009
Acquisitions
138 227 156 225 23 78 2000-2009
Extensions
51 120 166 13 96 446 1977-2009
New Field Discoveries
0 0 0 0 0 1 1977-2009
New Reservoir Discoveries in Old Fields
5 2 1 1 14 0 1977-2009
Estimated Production
220 234 232 227 217 214 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