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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
2,128 2,469 2,321 2,590 1,550 1,460 1977-2013
Adjustments
-8 2 4 902 -574 -55 1977-2013
Revision Increases
239 180 488 1,444 379 223 1977-2013
Revision Decreases
327 148 427 1,854 491 84 1977-2013
Sales
1 4 2 45 284 35 2000-2013
Acquisitions
23 78 0 42 92 25 2000-2013
Extensions
96 446 8 69 3 1 1977-2013
New Field Discoveries
0 1 1 0 4 0 1977-2013
New Reservoir Discoveries in Old Fields
14 0 0 0 9 0 1977-2013
Estimated Production
217 214 220 289 178 165 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