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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
1,030 917 853 860 607 595 1977-2013
Adjustments
12 26 1 109 65 29 1977-2013
Revision Increases
108 92 77 105 91 39 1977-2013
Revision Decreases
96 250 70 156 300 75 1977-2013
Sales
2 17 31 11 159 39 2000-2013
Acquisitions
4 2 13 10 109 90 2000-2013
Extensions
155 132 33 24 4 5 1977-2013
New Field Discoveries
2 2 0 1 1 0 1977-2013
New Reservoir Discoveries in Old Fields
3 0 0 0 0 0 1977-2013
Estimated Production
110 100 87 75 64 61 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