关键词: 水平井, 水力裂缝, 裂缝条数, 裂缝长度, 裂缝导流能力, 裂缝间距

Abstract: Over 200 heterogeneous geological models were established through reasonable abstraction. By means of reservoir numerical simulation, the paper had systematically studied the factors affecting the performance of fractured horizontal well, and Q_frac/Q_unfrac template was constructed. The factors taken into account include fracture direction corresponding to the direction of wellbore, K_v/K_h, number of fractures, length of fractures, fracture conductivity, distance between the cutmost fractures and length of uneven fractures.The study shows that the optimal number of fravtures might be 3, the opitimal length of fracture is related to fracture conductivity and reservoir permeability and for a specific reservoir, there does exist an opitmal fracture conductivity.Distance between the cutmost fractures influences the productivity of fractured horizontal well.The productivity of fractures is related to the positions of fractures on fractured horizontal wellbore.So, it is suggested that the length or conductivity of middle fracture be increased to achieve the productivity balance of different fractures.Finally, Q_frac/Q_unfrac template was established based on the studies of number of fractures, length of fracture and fracture conductivity.

Key words: horizontal well, hydraulic fracture, number of fractures, length of fractures, fracture conductivity, distance between fractures