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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
12,184 12,795 14,886 15,480 11,340 11,655 1977-2013
Adjustments
-51 423 403 296 -1,010 128 1977-2013
Revision Increases
2,231 1,820 2,660 4,894 2,108 2,089 1977-2013
Revision Decreases
1,770 2,225 2,680 5,464 5,203 1,404 1977-2013
Sales
1,048 358 505 3,938 290 429 2000-2013
Acquisitions
1,154 243 955 3,944 393 572 2000-2013
Extensions
1,390 1,671 2,173 1,670 979 409 1977-2013
New Field Discoveries
2 0 51 3 0 0 1977-2013
New Reservoir Discoveries in Old Fields
2 41 51 268 7 7 1977-2013
Estimated Production
983 1,004 1,017 1,079 1,124 1,057 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