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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
6,643 7,257 6,981 7,857 7,548 6,829 1977-2013
Adjustments
-4 1 -80 134 289 -582 1977-2013
Revision Increases
379 1,342 872 813 1,349 484 1977-2013
Revision Decreases
564 491 219 341 1,926 444 1977-2013
Sales
258 92 530 758 12 478 2000-2013
Acquisitions
251 133 7 833 22 640 2000-2013
Extensions
801 164 106 643 447 117 1977-2013
New Field Discoveries
64 0 0 1 0 0 1977-2013
New Reservoir Discoveries in Old Fields
0 4 0 0 0 0 1977-2013
Estimated Production
417 447 432 449 478 456 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