Assessment of potential additions to conventional oil and gas resources of the world (outside the United States) from reserve growth, 2012

http://pubs.usgs.gov/fs/2012/3052/

We used mathematical models to estimate the likely increases in the estimates of the amount of oil and gas technically recoverable from existing known large fields outside the US.

by Klett, Timothy R.; Cook, Troy A.; Charpentier, Ronald R.; Tennyson, Marilyn E.; Attanasi, Emil D.; Freeman, Philip A.; Ryder, Robert T.; Gautier, Donald L.; Verma, Mahendra K.; Le, Phuong A.; and Schenk, Christopher J.

U.S. Geological Survey Fact Sheet 2012-3052

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