Research on the propagation mechanism of hydraulic fractures in infill horizontal wells

In recent years, infill horizontal well technology has been used to develop oil and gas in the remaining areas of unconventional low-permeability reservoirs. However, initial fractures parent wells will affect hydraulic formed by fracturing infilling wells. The interaction mechanisms between artificial are still unclear. Combined with boundary element method maximum circumferential tensile stress criterion, a numerical model that can simulate evolution fracture trajectory field was established. analytical solution fracture-induced verify accuracy model. Using this model, propagation under different conditions analyzed. Simulation results show both spacing have significant impact on shorter is, stronger inter-fracture interference is. Reasonable enhance induced form complex network reservoir. Too small may cause communicate fractures, thereby reducing efficiency limiting stimulation volume