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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
2,073 2,060 2,255 2,238 1,800 2,090 1977-2010
Adjustments
156 207 -167 31 -90 -10 1977-2010
Revision Increases
188 209 282 286 190 333 1977-2010
Revision Decreases
260 511 218 414 372 302 1977-2010
Sales
207 138 267 100 22 18 2000-2010
Acquisitions
255 195 309 108 5 30 2000-2010
Extensions
338 321 541 352 86 178 1977-2010
New Field Discoveries
26 9 1 7 11 307 1977-2010
New Reservoir Discoveries in Old Fields
38 18 15 23 13 9 1977-2010
Estimated Production
305 323 301 310 259 237 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