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Nonassociated Natural Gas Proved Reserves, Wet After Lease Separation
(Billion Cubic Feet)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2007 2008 2009 2010 2011 2012 View
History
Proved Reserves as of Dec. 31
13,923 12,855 12,004 11,704 11,111 9,578 1979-2012
Adjustments
73 -14 263 120 179 49 1979-2012
Revision Increases
2,138 2,301 898 1,795 1,695 1,647 1979-2012
Revision Decreases
2,117 2,335 1,125 1,486 1,871 2,541 1979-2012
Sales
297 202 145 13 841 0 2000-2012
Acquisitions
161 5 66 0 844 5 2000-2012
Extensions
168 110 130 150 222 103 1979-2012
New Field Discoveries
0 0 1 0 0 0 1979-2012
New Reservoir Discoveries in Old Fields
0 1 0 0 7 0 1979-2012
Estimated Production
930 934 939 866 828 796 1979-2012
- = 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, Nevada, Oregon, South Dakota, and Tennessee.  See Definitions, Sources, and Notes link above for more information on this table.
Release Date: 4/10/2014
Next Release Date: 4/30/2015