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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
4,144 3,354 2,738 2,550 2,402 2,451 1981-2009
Adjustments
24 3 -2 -46 9 10 1981-2009
Revision Increases
2,229 821 383 337 448 596 1981-2009
Revision Decreases
2,526 959 577 426 620 447 1981-2009
Sales
265 147 1,191 93 85 34 2000-2009
Acquisitions
203 122 1,240 192 83 22 2000-2009
Extensions
83 97 204 132 294 19 1981-2009
New Field Discoveries
44 13 29 305 33 260 1981-2009
New Reservoir Discoveries in Old Fields
75 172 66 38 154 77 1981-2009
Estimated Production
1,077 912 768 627 464 454 1981-2009
- = 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