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Dry Natural Gas Proved Reserves
(Billion Cubic Feet)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2005 2006 2007 2008 2009 2010 View
History
Proved Reserves as of Dec. 31
4,459 4,509 4,729 5,136 5,946 7,000 1977-2010
Adjustments
214 -251 14 315 258 -359 1977-2010
Revision Increases
646 298 310 390 383 1,034 1977-2010
Revision Decreases
76 188 359 444 865 1,075 1977-2010
Sales
6 745 2 160 54 895 2000-2010
Acquisitions
132 886 25 118 2 984 2000-2010
Extensions
371 229 412 437 1,190 1,594 1977-2010
New Field Discoveries
11 3 11 0 166 0 1977-2010
New Reservoir Discoveries in Old Fields
0 5 1 1 8 64 1977-2010
Estimated Production
230 187 192 250 278 293 1977-2010
- = 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: 8/2/2012
Next Release Date: 8/30/2013