Pre-stack seismic full waveform inversion (FWI) is based on wave equation forward modeling technology to describe the propagation characteristics of seismic wave,using non-constrained iterative local optimization method to get high resolution inversion result.Compared with other inversion methods,FWI uses pre-stack common shot gather to perform inversion,in which the seismic data are free of the process of stack and preserve the features of waveform parameters variation with offset.The inversion result is no longer simple interface and traveltime information but depth-domain data volume which reflects formation velocity and structural characteristics,and this is helpful to the analysis and understanding of the geological body.In this paper,the technical advantages are analyzed in the aspect of pre-stack full waveform inversion methods,and the key technology to do a good job of pre-stack full waveform inversion is also analyzed through synthetic data.Furthermore,the technical advantages of pre-stack full waveform inversion are illustrated through inversion results in migration processing and its application in reservoir description of fluvial facies,and the existing difficulties and the future development direction of pre-stack seismic full waveform inversion are also analyzed,which will provide reference for further development and application of pre-stack seismic full waveform inversion.
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