Drillers in Utah and Colorado are poking into a massive shale deposit trying to find a way to unlock oil reserves that are so vast they would swamp OPEC.
A recent report by the U.S. Government Accountability Office estimated that if half of the oil bound up in the rock of the Green River Formation could be recovered it would be "equal to the entire world's proven oil reserves."
Both the GAO and private industry estimate the amount of oil recoverable to be 3 trillion barrels.
"In the past 100 years — in all of human history -- we have consumed 1 trillion barrels of oil. There are several times that much here," said Roger Day, vice president for operations for American Shale Oil (AMSO).
The Green River drilling is beginning as shale mining is booming in the U.S. and a report by the International Energy Agency predicts that the U.S. will become the world's largest oil producer by 2020. That flood of oil can have major implications for the U.S. economy as well as the country's foreign policy which has been based on a growing scarcity of oil.
The IEA report does not detail where the American oil will be coming from, but the largest deposit is the Green River formation which has yet to tapped in any significant way.
This tantalizing bonanza, however, remains just out of reach, at least for now. The cost of extracting the Green River oil at the moment would be higher than what it could be sold for. And there are significant environmental obstacles.
The operation might require so much water it would compete with Denver and agriculture for vital supplies, the GAO report warned, could pollute underground streams,
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