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Natural Gas Proved Reserves, Wet After Lease Separation
(Billion Cubic Feet)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2004 2005 2006 2007 2008 2009 View
History
Proved Reserves as of Dec. 31
1,229 1,205 1,109 1,101 1,047 1,523 1979-2009
Adjustments
66 27 87 -1 108 3 1979-2009
Revision Increases
115 73 38 74 44 114 1979-2009
Revision Decreases
133 136 190 117 154 113 1979-2009
Sales
85 65 0 191 5 38 2000-2009
Acquisitions
95 79 4 252 12 55 2000-2009
Extensions
95 119 77 72 27 155 1979-2009
New Field Discoveries
104 0 2 0 4 390 1979-2009
New Reservoir Discoveries in Old Fields
1 12 0 0 0 0 1979-2009
Estimated Production
124 133 114 97 90 90 1979-2009
- = 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.  See Definitions, Sources, and Notes link above for more information on this table.
Release Date: 12/30/2010
Next Release Date: 6/15/2012