PROCESS FOR RECOVERING OIL FROM AN OIL-BEARING FORMATION AND TREATING PRODUCED WATER CONTAINING ANTI-SCALING ADDITIVES
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Sep 18, 2014
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Mar 12, 2014
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Mar 14, 2013
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A method of recovering oil from an oil-bearing formation including recovering an oil-water mixture from the oil-bearing formation and separating produced water from the oil-water mixture. The produced water includes phosphonate anti-scalant compounds. An oxidant is mixed with the produced water to deactivate the phosphonate anti-scalant compounds, thereby permitting dissolved solids in the produced water to precipitate. After deactivating the phosphonate anti-scalant compounds, the produced water is directed into a ceramic membrane which filters the produced water, producing a permeate stream and a retentate stream having suspended solids and precipitants therein.
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