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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
9,037 10,904 12,464 10,115 8,894 9,195 1977-2013
Adjustments
63 18 336 -110 -725 378 1977-2013
Revision Increases
240 610 1,070 2,850 212 1,087 1977-2013
Revision Decreases
285 503 221 5,564 1,048 636 1977-2013
Sales
50 71 92 1,204 353 583 2000-2013
Acquisitions
217 86 46 1,432 281 18 2000-2013
Extensions
2,004 2,400 1,147 850 977 396 1977-2013
New Field Discoveries
1 0 0 10 0 0 1977-2013
New Reservoir Discoveries in Old Fields
21 14 7 0 46 244 1977-2013
Estimated Production
650 687 733 613 611 603 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