Shale boom confounds forecasts as U.S. set to pass Russia, Saudi Arabia

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NEW YORK (Reuters) - Four years into the shale revolution, the U.S. is on track to pass Russia and Saudi Arabia as the world's largest producer of crude oil, most analysts agree. When that happens and by how much, though, has produced disparate estimates that depend on uncertain factors ranging from progress in drilling technology to the availability of financing and the price of oil itself.



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