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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
3,174 2,763 2,919 2,505 1,750 1,807 1977-2013
Adjustments
-48 -279 243 8 -104 -62 1977-2013
Revision Increases
143 367 260 210 541 388 1977-2013
Revision Decreases
430 406 378 267 1,062 139 1977-2013
Sales
0 0 529 643 0 11 2000-2013
Acquisitions
10 16 711 403 0 11 2000-2013
Extensions
21 16 1 0 0 0 1977-2013
New Field Discoveries
4 19 2 14 7 0 1977-2013
New Reservoir Discoveries in Old Fields
1 9 0 0 1 3 1977-2013
Estimated Production
157 153 154 139 138 133 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