Seismic imaging of subsurface structure using tomographic migration velocity analysis: a case study of South China Sea data
Wang, Yibo1; Xu, Jialiang1; Xie, Songlei1; Zhang, Lele1; Du, Xiangdong1; Chang, Xu1; wangyibo@mail.igcas.ac.cn
2015
发表期刊MARINE GEOPHYSICAL RESEARCH
卷号36期号:2-3页码:127-137
摘要Seismic migration algorithms are often used to reveal subsurface structures and can be roughly divided into stacking methods, pre-stack time migration methods and pre-stack depth migration methods. In theory, pre-stack depth migration methods can provide the most accurate subsurface images. However, these methods are sensitive to the accuracy of the migration velocity model, and thus the creation of a precise migration velocity model is one of the most important steps in seismic processing. We applied the tomographic travel-time inversion and the method of pre-stack Kirchhoff depth migration-based migration velocity analysis (MVA) to certain South China Sea data, in which we iteratively inverted the precise, high-resolution migration velocity model. We selected travel-time differences from the offset-domain common image gathers of the pre-stack Kirchhoff depth migration and inverted the travel-time differences for velocity updating. After several iterations, both the precise migration velocity model and the corresponding pre-stack depth migration image were obtained. The comparisons with Normal Move-out stacking and pre-stack Kirchhoff time migration confirm that the tomographic MVA and corresponding pre-stack Kirchhoff depth migration provide the best image quality and highest-resolution subsurface images from the South China Sea data.
部门归属LMB
关键词Migration Velocity Analysis (Mva) Prestack Kirchhoff Depth Migration Travel-time Inversion Ray Tracing Offset-domain Common Image Gather (Odcig)
学科领域Geochemistry & Geophysics ; Oceanography
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文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/14785
专题中科院海洋生物资源可持续利用重点实验室
通讯作者wangyibo@mail.igcas.ac.cn
作者单位1.[Wang, Yibo
2.Xu, Jialiang
3.Zhang, Lele
4.Chang, Xu] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
5.[Xu, Jialiang
6.Zhang, Lele] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
7.[Xie, Songlei] Chinese Acad Sci, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China
8.[Du, Xiangdong] China Natl Offshore Oil Corp, Beijing 100027, Peoples R China
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GB/T 7714
Wang, Yibo,Xu, Jialiang,Xie, Songlei,et al. Seismic imaging of subsurface structure using tomographic migration velocity analysis: a case study of South China Sea data[J]. MARINE GEOPHYSICAL RESEARCH,2015,36(2-3):127-137.
APA Wang, Yibo.,Xu, Jialiang.,Xie, Songlei.,Zhang, Lele.,Du, Xiangdong.,...&wangyibo@mail.igcas.ac.cn.(2015).Seismic imaging of subsurface structure using tomographic migration velocity analysis: a case study of South China Sea data.MARINE GEOPHYSICAL RESEARCH,36(2-3),127-137.
MLA Wang, Yibo,et al."Seismic imaging of subsurface structure using tomographic migration velocity analysis: a case study of South China Sea data".MARINE GEOPHYSICAL RESEARCH 36.2-3(2015):127-137.
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