As seismic wave simulation and imaging methods have made great progress,multiple scattering waves are no longer suppressed as the noise but are used for high-precision seismic imaging.Unlike the conven-tional imaging method that is based on single scattering,the full-wavefield migration is a new data-driven method for imaging all scattering waves based on the multiple scattering assumption and inversion theory.Based on inverse scattering imaging theory,this paper improves the existing full-wavefield migration scheme and develops an amplitude-preserving inverse scattering imaging condition for high precision seismic imaging.Laplacian filter and source illumination term are added the cross-correlation imaging condition of the existing di-rect wave estimation and downward Green's function to attenuate backscattering and compensate for deep energy.The improved amplitude-preserving inverse scattering imaging condition produces higher imaging accu-racy and stronger adaptability for complex structures than the traditional imaging condition.Numerical tests demonstrate the effectiveness and applicability of the proposed method.
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