HoleInTheVoid
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- Sep 10, 2008
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Oil shale - Wikipedia, the free encyclopediaA 2005 estimate set the total world resources of oil shale at 411 gigatons — enough to yield 2.8 to 3.3 trillion barrels (520 km3) of shale oil.[2][3][4][5] This exceeds the world's proven conventional oil reserves, estimated at 1.317 trillion barrels (209.4×109 m3), as of 1 January 2007.[22] The largest deposits in the world occur in the United States in the Green River basin, which covers portions of Colorado, Utah, and Wyoming; about 70% of this resource is located on federally owned or managed land.[23] Deposits in the United States constitute 62% of world resources;
So if the US has 60% of (rounded) 3 trillion barrels that's 1.8 trillion barrels.
If we use 20 million barrels a day = 90,000 days (246 years) of oil from wholly domestic sources.