"FILE - This Feb. 17, 2016, file photo shows a water pool attached to Robinson Drilling rig No. 4 in Midland County, Texas. Ken Medlock, director of an energy-studies program at Rice University in Houston, says an assessment Tuesday, Nov. 15, 2016, by the U.S. Geological Survey that the Wolfcamp Shale in the Midland region could yield 20 billion barrels of oil is another sign that ""the revival of the Permian Basin is going to last a couple of decades."""
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