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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
4,127 3,342 2,725 2,544 2,392 2,451 1981-2009
Adjustments
24 6 -4 -39 5 20 1981-2009
Revision Increases
2,220 819 381 336 446 596 1981-2009
Revision Decreases
2,516 956 575 425 618 447 1981-2009
Sales
264 147 1,186 93 84 34 2000-2009
Acquisitions
202 121 1,234 191 83 22 2000-2009
Extensions
83 96 203 132 293 19 1981-2009
New Field Discoveries
44 14 29 304 32 260 1981-2009
New Reservoir Discoveries in Old Fields
75 171 66 38 153 77 1981-2009
Estimated Production
1,072 909 765 625 462 454 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