Two-dimensional joint inversion based on the marine controlled-source electromagnetic method and seismic full-waveform
KONG Fan-Xiang1(), TAN Han-Dong2, LIU Jian-Xun1
1. Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China 2. School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China
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 gradient 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 textures and their physical property values. Therefore, the full-waveform inversion can enhance the reliability of the MCSEM inversion results.
孔繁祥, 谭捍东, 刘建勋. 海洋可控源电磁法与地震全波形二维联合反演研究[J]. 物探与化探, 2024, 48(1): 67-76.
KONG Fan-Xiang, TAN Han-Dong, LIU Jian-Xun. Two-dimensional joint inversion based on the marine controlled-source electromagnetic method and seismic full-waveform. Geophysical and Geochemical Exploration, 2024, 48(1): 67-76.
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