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By Anna Driver and Terry Wade MERTZON, Texas (Reuters) - At a dusty Texas oilfield, Apache Corp has eliminated its reliance on what arguably could be the biggest long-term constraint for fracking wells in the arid western United States: scarce freshwater. For only one well, millions of gallons of water are used for hydraulic fracturing, or fracking, the process that has helped reduce U.S. reliance on foreign oil over the past five years by cracking rock deep underground to release oil and gas. In Irion County, where Apache is drilling dozens of Wolfcamp shale wells in the Permian Basin, the company is meeting its water needs for hydraulic fracturing by using brackish water from the Santa Rosa aquifer and recycling water from wells and fracking using chemicals.
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