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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
985 896 832 758 1,233 3,161 1977-2013
Adjustments
210 70 127 -99 -41 -328 1977-2013
Revision Increases
135 70 68 17 180 530 1977-2013
Revision Decreases
333 43 59 38 162 158 1977-2013
Sales
31 196 374 0 0 12 2000-2013
Acquisitions
32 79 239 4 71 0 2000-2013
Extensions
23 10 8 118 493 1,779 1977-2013
New Field Discoveries
1 0 0 0 14 17 1977-2013
New Reservoir Discoveries in Old Fields
0 0 0 0 5 266 1977-2013
Estimated Production
79 79 73 76 85 166 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