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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
10,450 9,362 8,896 8,156 7,291 6,482 1981-2013
Adjustments
10 2 -106 -28 -429 76 1981-2013
Revision Increases
1,230 1,637 2,617 2,050 2,229 1,017 1981-2013
Revision Decreases
1,312 1,417 1,771 2,260 2,178 789 1981-2013
Sales
616 124 741 295 511 850 2000-2013
Acquisitions
532 159 785 385 734 363 2000-2013
Extensions
610 270 186 81 239 175 1981-2013
New Field Discoveries
279 48 68 562 64 84 1981-2013
New Reservoir Discoveries in Old Fields
379 223 213 76 48 56 1981-2013
Estimated Production
1,752 1,886 1,717 1,311 1,061 941 1981-2013
- = 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