Development of tight oil reservoir relies on multistage fracturing techniques, which inject the compressed fluid to create hydraulic fractures, communicating with natural fractures, and forming complex fracture networks around the wellbore. Many previous experimental research and theoretical analysis have shown that hydraulic fracturing can form a variety of fracture network under different conditions. 1,2 The characteristics of the fracture network formed by hydraulic fracturing directly affect the production performance of the horizontal wells. Therefore, accurately describing the characteristics