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Estimated Dry Natural Gas contained in Total Natural Gas Proved Reserves
(Billion Cubic Feet)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2008 2009 2010 2011 2012 2013 View
History
Proved Reserves as of Dec. 31
3,290 2,871 2,629 2,475 2,228 1,597 1977-2013
Adjustments
-71 46 32 -49 112 -274 1977-2013
Revision Increases
283 99 206 455 99 67 1977-2013
Revision Decreases
732 328 173 157 254 75 1977-2013
Sales
10 2 263 573 11 357 2000-2013
Acquisitions
21 0 148 383 21 183 2000-2013
Extensions
59 20 28 3 0 0 1977-2013
New Field Discoveries
2 0 3 2 0 0 1977-2013
New Reservoir Discoveries in Old Fields
1 0 0 0 0 0 1977-2013
Estimated Production
257 254 223 218 214 175 1977-2013
- = 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. Estimated Dry Natural Gas is calculated from Total Natural Gas Proved Reserves.  See Definitions, Sources, and Notes link above for more information on this table.
Release Date: 12/4/2014
Next Release Date: 12/31/2015