Full-waveform inversion imaging method and device for deep target reservoir

The invention relates to the technical field of oil-gas exploration geophysics, and discloses a full-waveform inversion imaging method and device for a deep target reservoir, and the method comprises the steps: S1, selecting an underground reference plane position and a target reservoir region, building a corresponding virtual observation system according to the target reservoir region, and carrying out the observation of the virtual observation system; the reference surface position can be a known geologic layer interface or an empirically selected geologic landmark interface; and S2, according to the characteristics of the target reservoir area, a virtual observation system is established, and the observation system can comprise a plurality of sensors or receivers and is used for recording wave field information propagated in an underground medium. According to the method, the influence of the overlying model on the earth surface observation data is eliminated, the extracted virtual seismic reflection data