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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
2,406 2,773 2,647 2,934 1,999 1,887 1977-2013
Adjustments
-6 11 10 923 -563 -72 1977-2013
Revision Increases
263 259 548 1,486 538 256 1977-2013
Revision Decreases
491 189 451 1,889 539 103 1977-2013
Sales
8 4 3 47 284 70 2000-2013
Acquisitions
30 78 0 52 92 60 2000-2013
Extensions
101 450 12 73 8 3 1977-2013
New Field Discoveries
0 1 1 0 4 0 1977-2013
New Reservoir Discoveries in Old Fields
14 0 0 0 9 2 1977-2013
Estimated Production
237 239 243 311 200 188 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