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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
4,946 4,827 4,787 4,475 4,890 4,800 1977-2013
Adjustments
49 29 68 -311 639 -236 1977-2013
Revision Increases
199 355 535 684 421 693 1977-2013
Revision Decreases
690 447 710 708 1,113 889 1977-2013
Sales
136 90 575 260 84 129 2000-2013
Acquisitions
264 97 451 271 106 127 2000-2013
Extensions
260 263 496 305 708 568 1977-2013
New Field Discoveries
0 0 0 0 1 0 1977-2013
New Reservoir Discoveries in Old Fields
1 2 10 0 46 104 1977-2013
Estimated Production
342 328 315 293 309 328 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