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Estimated Dry Natural Gas contained in Total Natural Gas Proved Reserves
(Billion Cubic Feet)
Area: Period:
 Annual 
 Show Data By:
Data Series Area
2008 2009 2010 2011 2012 2013 View
History
Proved Reserves as of Dec. 31
4,031 4,141 4,226 4,379 4,386 4,633 1977-2013
Adjustments
-8 251 -200 -124 59 -194 1977-2013
Revision Increases
549 541 480 502 814 1,014 1977-2013
Revision Decreases
441 628 418 431 850 715 1977-2013
Sales
211 149 133 199 311 483 2000-2013
Acquisitions
186 229 419 257 111 285 2000-2013
Extensions
415 317 326 520 583 698 1977-2013
New Field Discoveries
0 0 0 3 1 0 1977-2013
New Reservoir Discoveries in Old Fields
6 3 3 2 4 89 1977-2013
Estimated Production
459 454 392 377 404 447 1977-2013
- = 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. Estimated Dry Natural Gas is calculated from Total Natural Gas Proved Reserves.  See Definitions, Sources, and Notes link above for more information on this table.
Release Date: 12/4/2014
Next Release Date: 12/31/2015