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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
2,382 2,077 2,242 3,305 2,943 2,787 1977-2013
Adjustments
-12 63 68 -65 666 -162 1977-2013
Revision Increases
154 144 260 387 41 405 1977-2013
Revision Decreases
307 193 231 344 983 223 1977-2013
Sales
27 494 3 683 142 18 2000-2013
Acquisitions
16 27 0 1,855 116 15 2000-2013
Extensions
626 319 220 109 205 2 1977-2013
New Field Discoveries
1 0 0 0 0 0 1977-2013
New Reservoir Discoveries in Old Fields
1 0 0 0 0 53 1977-2013
Estimated Production
187 171 149 196 265 228 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