Influence of Boron Content on Characteristics of Fracturing Fluid

At present, fracturing is an important measure for oil and gas fields to increase production and increase profits; returned liquid generated after operation has become one of the important control pollutants for the environmental protection of oil and gas fields; re-use of fracturing fluid backwaters has become an important development direction of waste water resource utilization. In this paper, four kinds of different salinity aqueous solutions of distilled water, tap water, No.2 and treated backflow were studied; effect of different boron content on viscosity, temperature resistance and temperature-resisting shear resistance of fracturing fluid based on four kinds of water solvents. The results show that when the content of boron in distilled water is 1mg/ L and the content of boron in tap water is 2mg/L, the viscosity, temperature resistance, shear resistance and temperature resistance of the fracturing fluid are all meet the requirements.No.2 simulated water and fracturing flow back fluid after treatment were added boron content of 10mg/L and 18mg/L respectively, the viscosity of the base fluid to meet the requirements, however, without boron, the shear resistance and temperature resistance are poor, does not meet the requirements.