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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
2,752 2,616 2,588 2,260 2,154 2,307 1977-2013
Adjustments
104 -124 82 -95 164 49 1977-2013
Revision Increases
376 490 482 375 604 547 1977-2013
Revision Decreases
539 369 319 252 631 284 1977-2013
Sales
73 174 184 274 214 103 2000-2013
Acquisitions
59 190 199 204 182 130 2000-2013
Extensions
371 288 175 104 121 119 1977-2013
New Field Discoveries
13 61 20 16 10 3 1977-2013
New Reservoir Discoveries in Old Fields
42 11 25 3 8 9 1977-2013
Estimated Production
505 509 508 409 350 317 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