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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
11,573 20,688 29,277 30,358 21,949 20,164 1981-2013
Adjustments
-71 319 -612 178 605 -42 1981-2013
Revision Increases
1,387 1,863 3,149 3,755 3,757 2,951 1981-2013
Revision Decreases
1,376 3,105 3,184 5,843 12,816 3,787 1981-2013
Sales
1,069 127 738 5,583 352 1,049 2000-2013
Acquisitions
1,287 103 847 5,552 285 1,425 2000-2013
Extensions
1,848 9,807 10,989 5,793 3,151 1,023 1981-2013
New Field Discoveries
191 257 48 47 5 17 1981-2013
New Reservoir Discoveries in Old Fields
650 1,542 279 167 13 21 1981-2013
Estimated Production
1,319 1,544 2,189 2,985 3,057 2,344 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