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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
3,228 2,794 2,740 2,406 2,773 2,647 1977-2010
Adjustments
78 -74 33 -6 11 10 1977-2010
Revision Increases
739 156 355 263 259 548 1977-2010
Revision Decreases
129 419 273 491 189 451 1977-2010
Sales
201 274 164 8 4 3 2000-2010
Acquisitions
244 252 231 30 78 0 2000-2010
Extensions
129 176 16 101 450 12 1977-2010
New Field Discoveries
0 0 0 0 1 1 1977-2010
New Reservoir Discoveries in Old Fields
2 4 1 14 0 0 1977-2010
Estimated Production
268 255 253 237 239 243 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