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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
31,143 35,283 35,074 35,290 30,094 33,618 1977-2013
Adjustments
27 1,158 521 -209 692 2,058 1977-2013
Revision Increases
5,316 5,281 4,880 3,271 1,781 3,800 1977-2013
Revision Decreases
4,383 3,535 5,540 3,033 6,715 1,737 1977-2013
Sales
286 174 1,278 1,145 536 695 2000-2013
Acquisitions
170 54 1,308 1,205 619 679 2000-2013
Extensions
2,566 3,501 2,117 2,214 953 1,400 1977-2013
New Field Discoveries
1 0 1 0 0 0 1977-2013
New Reservoir Discoveries in Old Fields
48 88 0 1 11 11 1977-2013
Estimated Production
2,026 2,233 2,218 2,088 2,001 1,992 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