CPC C09K 8/665 (2013.01) [C01F 11/462 (2013.01); C02F 9/00 (2013.01); C09K 8/032 (2013.01); C02F 1/001 (2013.01); C02F 1/24 (2013.01); C02F 1/283 (2013.01); C02F 1/285 (2013.01); C02F 1/385 (2013.01); C02F 1/40 (2013.01); C02F 1/42 (2013.01); C02F 1/44 (2013.01); C02F 1/52 (2013.01); C02F 5/02 (2013.01); C02F 2101/10 (2013.01); C02F 2101/32 (2013.01); C02F 2103/08 (2013.01); C02F 2103/10 (2013.01)] | 7 Claims |
1. A method of generating base water for hydraulic fracturing fluid and producing barium sulfate, comprising:
treating produced water to remove oil from the produced water;
treating the produced water to remove calcium and magnesium from the produced water;
combining the produced water with seawater to give a mixture;
precipitating barium sulfate in the mixture from barium in the produced water and from sulfate in the seawater;
separating the barium sulfate as precipitated from the mixture to give base water for a hydraulic fracturing fluid, the base water comprising less than a specified concentration of sulfate; and
collecting the barium sulfate as separated to give the barium sulfate as a weighting agent for drilling fluid.
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