Research on numerical method for evaluation of vertical well volume fracturing effect based on production data and well test data

Abstract Volume transformation technology has become a key for developing low-permeability/tight oil and gas reservoirs. Evaluating the post-fracturing effect is very important development plan formulation fracturing evaluation. In this paper, vicinity of main fracture divided into zone secondary zone. The with infinite conductivity branch increased permeability are used to describe area. Based on physical model, numerical model considering nonlinear seepage characteristics reservoir, stress sensitivity, wellbore storage skin effects was established. comprehensive evaluation method volume modification vertical wells based well test data production established applied three typical wells. results show that conventional can only form single primary range equivalent increase small. network composed fractures fractures, half-length, reconstruction area dynamically changing gradually decrease in time becomes weak until it fails.