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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
691 755 813 954 1,030 917 1977-2009
Adjustments
20 5 -26 37 12 26 1977-2009
Revision Increases
48 57 96 53 108 92 1977-2009
Revision Decreases
55 27 40 50 96 250 1977-2009
Sales
18 17 44 24 2 17 2000-2009
Acquisitions
9 54 30 78 4 2 2000-2009
Extensions
27 75 119 146 155 132 1977-2009
New Field Discoveries
0 0 0 0 2 2 1977-2009
New Reservoir Discoveries in Old Fields
7 3 6 1 3 0 1977-2009
Estimated Production
93 86 83 100 110 100 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