Billionaire oilman Harold Hamm believes North Dakota’s oil reserves are double the federal government’s estimates. Hamm was the keynote speaker Monday at an energy conference in Bismarck. He said the U.S. Geological Survey’s estimate of 4.2 billion barrels of…

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North Dakota – Bismarck North Dakota – United States – United States Geological Survey – Oil reserves

Original post:
Oilman says ND reserves could be double estimates