Hydraulic sand blasting segregated fracturing optimization and operation technology

Based on the characteristics of hydraulic sand blasting segregated fracturing technology, combined with the conventional sand fracturing methods, a new method of hydraulic sand blasting segregated fracturing optimization is developed. Through numerical calculation, the curves showing the match of nozzle number with operation displacement and the correlation between annular pressure and displacement are given in this paper. The proportion of the oil tube and the fracturing fluid with annular water injection is simulated; viscoelasticity recovery capability and shearing resistence property of fracturing fluid mixture are studied. All this provides guidance and reference for the design of nozzle number, displacement, and jet flow velocity of hydraulic sand blasting perforation, and the optimization of sand fracturing oil tube and annular displacement.