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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
3,557 3,279 3,673 3,486 3,308 3,592 1977-2013
Adjustments
-6 224 140 125 -236 -20 1977-2013
Revision Increases
334 212 687 152 742 733 1977-2013
Revision Decreases
498 403 166 240 475 521 1977-2013
Sales
17 2 17 124 887 31 2000-2013
Acquisitions
30 1 23 122 644 31 2000-2013
Extensions
78 24 27 62 310 375 1977-2013
New Field Discoveries
9 0 4 0 5 0 1977-2013
New Reservoir Discoveries in Old Fields
2 0 1 1 0 0 1977-2013
Estimated Production
357 334 305 285 281 283 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