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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
2009 2010 2011 2012 2013 2014 View
History
Proved Reserves as of Dec. 31
12,795 14,886 15,480 11,340 11,655 11,516 1977-2014
Adjustments
423 403 296 -1,010 128 -272 1977-2014
Revision Increases
1,820 2,660 4,894 2,108 2,089 1,979 1977-2014
Revision Decreases
2,225 2,680 5,464 5,203 1,404 1,178 1977-2014
Sales
358 505 3,938 290 429 842 2000-2014
Acquisitions
243 955 3,944 393 572 614 2000-2014
Extensions
1,671 2,173 1,670 979 409 562 1977-2014
New Field Discoveries
0 51 3 0 0 0 1977-2014
New Reservoir Discoveries in Old Fields
41 51 268 7 7 0 1977-2014
Estimated Production
1,004 1,017 1,079 1,124 1,057 1,002 1977-2014
- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Notes: Miscellaneous States includes Arizona, Idaho, 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: 11/19/2015
Next Release Date: 12/31/2016