Numerical Simulation on Radial Well Deflagration Fracturing Based on Phase Field Method

A radial well has a unique wellbore configuration. Fracture propagation in deflagration fracturing is studied rarely. The mechanism of interaction between fractures, natural and micro-fractures still unknown. Based on continuum mechanics, damage variational principles, numerical model fracture established with the Hamilton principle phase-field theory. effects horizontal principal stress difference, distribution, around are studied. First, when no fractures developed well, initiated at both ends well. Second, there three created have morphology shorter middle longer sides under interference mechanisms. Third, larger density causes obvious superposition, changes initiation points wells morphology, increases width reservoir stimulation volume. Fourth, as increase, their induction enhanced gradually, deflection angle by 38.7%. study provides reference for optimizing