Horizontal well staged fracturing process parameter optimization method considering sandstone choked flow zone

The invention provides a horizontal well staged fracturing process parameter optimization method considering a sandstone choked flow zone, which comprises the following steps of: (1) collecting geological parameters of a tight sandstone reservoir, and establishing a reservoir heterogeneous physical model; (2) establishing a stress field model and a flow field model, and constructing a fluid-solid coupling equation; (3) adopting the maximum energy release rate as a crack propagation criterion; (4) integrating the steps 1-3 to establish an intra-segment multi-cluster crack propagation model under different choked flow zone modes; and (5) changing geology, construction and well completion parameters of a matrix part for simulation, and preferably selecting optimal construction parameters of different reservoirs. According to the method, the influence rule of reservoir heterogeneity caused by a choked flow zone in tight sandstone on multi-cluster crack propagation is fully considered, and multi-cluster crack prop