| 崎岖海底OBC地震数据全波形反演策略 |
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| 引用本文： | 赫建伟,周家雄,王宇,张盼,王新领.崎岖海底OBC地震数据全波形反演策略[J].世界地质,2017,36(1):274-282. |
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| 作者姓名： | 赫建伟 周家雄 王宇 张盼 王新领 |
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| 作者单位： | 1. 中海石油(中国)有限公司 湛江分公司, 广东 湛江 524057;
2. 吉林大学 地球探测科学与技术学院, 长春 130026;
3. 中海油能源发展物探技术研究所, 广东 湛江 524057 |
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| 摘 要： | 针对崎岖海底引起的波场传播和全波形反演处理的复杂性,本文提出相应的反演策略。通过对崎岖海底网格特殊处理解决正演和静校正时的地形近似问题。全波形反演采用快速多尺度算法、宽角补偿策略和静校正处理策略。结果表明,该反演策略在大大提高反演效率的同时,能兼顾深部和远偏移距反演效果,并能针对海水误差情况选择策略,在崎岖海底情况下得到好的全波形反演结果。
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| 关 键 词： | 崎岖海底 OBC采集 全波形反演 静校正 宽角补偿 |
| 收稿时间： | 2016-04-20 |
| 修稿时间： | 2016-07-05 |
Strategy for full waveform inversion of OBC seismic data on rugged seafloor |
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| HE Jian-wei,ZHOU Jia-xiong,WANG Yu,ZHANG Pan,WANG Xin-ling.Strategy for full waveform inversion of OBC seismic data on rugged seafloor[J].World Geology,2017,36(1):274-282. |
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| Authors: | HE Jian-wei ZHOU Jia-xiong WANG Yu ZHANG Pan WANG Xin-ling |
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| Institution: | 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 |
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| Abstract: | 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. |
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| Keywords: | rugged seafloor OBC acquisition full waveform inversion static correction wide angle compensation |
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