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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
20,281 22,343 24,363 27,843 17,331 19,280 1977-2013
Adjustments
-61 96 27 674 -1,078 269 1977-2013
Revision Increases
2,689 1,904 1,577 3,693 336 3,338 1977-2013
Revision Decreases
1,013 1,458 1,274 2,157 8,168 769 1977-2013
Sales
651 31 1 10,556 529 93 2000-2013
Acquisitions
582 277 5 10,694 289 574 2000-2013
Extensions
3,048 2,992 3,457 3,034 387 188 1977-2013
New Field Discoveries
0 0 0 2 0 0 1977-2013
New Reservoir Discoveries in Old Fields
3 0 0 0 3 24 1977-2013
Estimated Production
1,521 1,718 1,771 1,904 1,752 1,582 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