Viscoelastic surfactant fracturing fluid

To reduce the fracturing process proppant sand manufacturers  eservoir and propped fracture injury , developed a viscoelastic surfactant fracturing fluids and using a capillary rheometer test equipment, the performance of fracturing fluid were Research . Laboratory evaluation results show that the ceramic proppants under conditions of 100 ℃ and 170s-1 , and after 1h shear viscosity in 130mPa · s or more ; 120 ℃ under the conditions of 170s-1 and , after 1h shear viscosity of 50mPa · s or more ; with the extension of the shearing time , a small change in viscosity of the fracturing fluid ; with decreasing temperature , the viscosity of the fracturing fluid has good recovery . The test results show that the high viscosity fracturing fluid and low cost , formation damage fracturing fluid lower than about 50 %. Field test confirmed that friction viscoelastic surfactant fracturing fluid equivalent to 25 % to 30% water friction , and friction is lower than the fracturing fluid 1MPa/1000m, 2口fracture stimulation of oil wells 5600t. Use the fracturing liquid fracturing , can effectively reduce the fracturing fluid to the reservoir and propped fracture damage, while improving the well stimulation effect .