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Dry Natural Gas Proved Reserves
(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
310 802 1,471 2,117 2,382 2,077 1977-2009
Adjustments
52 -33 -61 -38 -12 63 1977-2009
Revision Increases
23 142 197 154 154 144 1977-2009
Revision Decreases
64 50 67 74 307 193 1977-2009
Sales
19 23 48 41 27 494 2000-2009
Acquisitions
22 121 57 78 16 27 2000-2009
Extensions
7 400 681 706 626 319 1977-2009
New Field Discoveries
0 0 0 0 1 0 1977-2009
New Reservoir Discoveries in Old Fields
0 0 0 0 1 0 1977-2009
Estimated Production
51 65 90 139 187 171 1977-2009
- = 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: 12/30/2011