An effective fluid loss control measure that has recently found application in the hydraulic fracturing of gas wells is the addition of an iramiscible hydrocarbon phase to aqueous fracturing fluids. In this work the effectiveness and regained permeabilities after employing hydrocarbon and common particulates are assessed. Laboratory studies indicate that reduced hydrocarbon concentrations (<5%) may be beneficial in achieving efficient fracture cleanup. A detailed evaluation of the parameters controlling fluid loss of an immiscible hydrocarbon phase in aqueous fluids has led to an optimized hydrocarbon-surfactant system, with which excellent regained permeabilities and efficient fluid loss control are achieved at reduced hydrocarbon concentrations.

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