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| Keywords | |
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rugged seafloor |
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OBC acquisition |
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full waveform inversion |
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static correction |
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wide angle compensation |
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| PubMed | |
Strategy for full waveform inversion of OBC seismic data on rugged seafloor
HE Jian-wei1, ZHOU Jia-xiong1, WANG Yu1, ZHANG Pan2, WANG Xin-ling3
1. Zhanjiang Branch of CNOOC LTD, Zhanjiang 524057, Guangdong, China;
2. College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China;
3. CNOOC Prospecting Geophysical Institute, Zhanjiang 524057, Guangdong, China
Aiming at the complexity of wavefield propagation and full waveform inversion (FWI) processing caused by rugged seafloor, this study proposes the corresponding inversion strategy. Special processing is applied to the grids on rugged seafloor to solve the problems on topography approximation during forward modeling and static correction. The authors use fast multi-scale algorithm, wide angle compensation strategy and static correction strategy in FWI. The result shows that the inversion strategy proposed in this study can both significantly improve the inversion efficiency and obtain good inversion results in deep parts and far offset. It can also choose strategy according to the water error, to achieve good FWI results on rugged seafloor.