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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
6,922 6,882 7,663 7,513 7,253 7,034 1977-2013
Adjustments
-55 188 -172 -76 301 41 1977-2013
Revision Increases
539 526 1,252 795 1,022 891 1977-2013
Revision Decreases
781 1,060 958 1,413 2,427 1,369 1977-2013
Sales
677 46 131 1,089 132 533 2000-2013
Acquisitions
474 68 96 579 671 813 2000-2013
Extensions
1,362 837 1,263 1,687 1,003 532 1977-2013
New Field Discoveries
353 0 0 3 0 0 1977-2013
New Reservoir Discoveries in Old Fields
0 0 0 14 0 92 1977-2013
Estimated Production
574 553 569 650 698 686 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