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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
6,824 6,672 7,206 7,039 7,738 8,629 1977-2013
Adjustments
-25 233 304 -703 395 243 1977-2013
Revision Increases
1,054 828 1,082 1,056 1,115 1,154 1977-2013
Revision Decreases
773 1,375 1,268 1,028 1,549 1,060 1977-2013
Sales
101 260 363 185 385 608 2000-2013
Acquisitions
232 194 758 482 656 575 2000-2013
Extensions
402 747 568 676 1,023 1,223 1977-2013
New Field Discoveries
1 1 0 4 7 0 1977-2013
New Reservoir Discoveries in Old Fields
15 25 2 1 1 26 1977-2013
Estimated Production
541 545 549 470 564 662 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