High-precision inversion method for deep-water turbidite sandstone reservoir under complex fracture system

The invention relates to a high-precision inversion method for a deep-water turbidite sandstone reservoir under a complex fracture system. The high-precision inversion method comprises the following steps that 1, a three-dimensional fault framework model is established according to fault interpreting data; 2, a three-dimensional horizon framework model is established according to seismic horizon interpreting data; 3, the development sequence of a fault and a horizon is judged according to tectonic evolution characteristics and geological prior information, the space truncation relation of thefault and the horizon is defined on the basis, and the three-dimensional fault framework model obtained in the step 1 and the three-dimensional horizon framework model obtained in the step 2 are combined to obtain a high-precision three-dimensional seismic formation framework; 4, a 'multi-body phase controlled iteration method' is adopted to establish an inversive low-frequency model; 5, iterativeoptimization is conducted