A rigid double-tailed surfactant preparation method and its application in clean fracturing fluid

Using 1,8-dihydroxynaphthalene, thionyl chloride and long-chain tertiary amine as the main raw materials, a facile preparation method and formulation of a rigid double-tailed surfactant for clean fracturing fluid were developed. The temperature resistance test and the determination of hydrogen spectrum reveal that the clean fracturing fluid with the prepared surfactant as thickener has excellent salt and temperature resistance. The shear viscosity of the best product at 120 degrees C and 170 s(-1) is not less than 65 mPa s, which meets the requirements of 25 mPa s for the field construction of clean fracturing fluid.

Automated summary

A facile preparation method and formulation of a rigid double-tailed surfactant for clean fracturing fluid was developed using 1,8-dihydroxynaphthalene, thionyl chloride and long-chain tertiary amine as main raw materials. The clean fracturing fluid with the prepared surfactant as thickener exhibits excellent salt and temperature resistance, as demonstrated by the temperature resistance test and determination of hydrogen spectrum. The shear viscosity of the best product at 120 degrees C and 170 s(-1) meets the requirement of 25 mPa s for the field construction of clean fracturing fluid.