2010 updated assessment of undiscovered oil and gas resources of the National Petroleum Reserve in Alaska (NPRA)

http://pubs.usgs.gov/fs/2010/3102/

We estimate mean volumes of 896 million barrels of oil and about 53 trillion cubic feet of nonassociated natural gas in conventional, undiscovered accumulations within this area, a reduction of our 2002 estimate due to new geologic information.

by Houseknecht, David W.; Bird, Kenneth J.; Schuenemeyer, John H.; Attanasi, Emil D.; Garrity, Christopher P.; Schenk, Christopher J.; Charpentier, Ronald R.; Pollastro, Richard M.; Cook, Troy A.; and Klett, Timothy R.

U.S. Geological Survey Fact Sheet 2010-3102

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