The U.S. Geological Survey estimated there are at least 665 billion barrels of undiscovered oil in reserves outside United States.
"The USGS estimates that the mean undiscovered, conventional reserve additions in the world total 665 billion barrels of oil, 1,429 trillion cubic feet of natural gas and 16 billion barrels of natural gas liquids," it said.
Its assessment didn't include oil and natural gas fields in the United States, unconventional accumulations or so-called tar sands. . .View Full Article