Seismic phased inversion method and device for ultra-deep carbonatite fault karst reservoir

The invention discloses a seismic phased inversion method and device for an ultra-deep carbonatite fault-karst reservoir. The method comprises the following steps: constructing a mixed velocity model by adopting logging data, a seismic horizon and a seismic migration velocity body; constructing an inversion initial model based on the mixed velocity model; seismic tensor and coherent energy are adopted as prior seismic facies information representing a fault zone and a karst cave, and a three-dimensional fracture target is extracted as a space boundary constraint of phase control modeling; sequentially adding prior seismic facies information into the initial inversion model by using a linear weak phase control constraint modeling mode, and updating and iterating the initial inversion model to obtain a phase control constraint initial inversion model; and performing constrained sparse pulse inversion based on the phase control constrained inversion initial model to obtain a seismic phase control inversion resul