Two-dimensional joint inversion based on the marine controlled-source electromagnetic method and seismic full-waveform
To reduce the limitations and the multiplicity of solutions of a single geophysical inversion method,this study investigated the two-dimensional joint inversion based on the marine controlled-source electromagnetic(MCSEM)method and seismic full-waveform inversion.The MCSEM method employs the data-space Occam's algorithm,while the seismic full-waveform inversion utilizes the gra-dient algorithm.By incorporating a cross-gradient function for the mutual coupling of the two types of physical property parameters,this study developed a two-dimensional joint inversion method,whose accuracy was verified using three different models.As indicated by the results,compared to a single inversion method,the MCSEM-based joint inversion yielded significantly improved inversion results,predominantly in terms of the morphology characterization of anomalous bodies,as well as the reconstruction of their structure and tex-tures and their physical property values.Therefore,the full-waveform inversion can enhance the reliability of the MCSEM inversion re-sults.
万方数据
维普
