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  2. 地质与地球物理研究所
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  4. 中国科学院油气资源研究重点实验室
Prestack time migration from 3D irregular surfaces with near-surface-related deabsorption

文献类型：期刊论文

作者Xu, Jincheng2; Zhang, Jianfeng1,2; Liu, Linong1; Zhang, Wei2; Yang, Hui2
刊名GEOPHYSICS
出版日期2020
卷号85期号:1页码:S21-S32
ISSN号0016-8033
DOI10.1190/GEO2019-0259.1
英文摘要We have developed a 3D prestack time migration (PSTM) approach that can directly migrate nonplanar data with near-surface-related deabsorption using three effective parameters. The proposed scheme improves the so-called topography PSTM approach by adding a near-surface effective Q parameter that compensates for the absorption and dispersion of waves propagating through near-surface media. The two effective velocity parameters above and below the datum can be estimated by flattening events in imaging gathers, and the additional near-surface effective Q parameter can be obtained using scanning technology. Hence, no knowledge with respect to near-surface media is needed in advance for implementing the proposed scheme. The proposed topography-deabsorption PSTM method can be applied to seismic data recorded on a 3D irregular surface without statics corrections. Consequently, traveltimes are obtained with improved accuracy because the raypath bends away from the vertical in the presence of high near-surface velocities, and the absorption and dispersion caused by strong intrinsic attenuation in near-surface media are correctly compensated. Moreover, we attenuated the migrated noise by smearing each time sample only along the Fresnel zone rather than along the entire migration aperture. As a result, an image with a higher resolution and superior signal-to-noise ratio is achieved. The performance of the proposed topography-deabsorption PSTM scheme has been verified using synthetic and field data sets.
WOS关键词DEPTH MIGRATION ; EXTRAPOLATION ; ATTENUATION ; TOPOGRAPHY ; COMPENSATION ; ABSORPTION
资助项目National Natural Science Fund of China[41804107] ; National Major Project of China[2017ZX05008-007]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000506219100041
出版者SOC EXPLORATION GEOPHYSICISTS
资助机构National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/95848]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Zhang, Jianfeng
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
2.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen 518055, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Jincheng,Zhang, Jianfeng,Liu, Linong,et al. Prestack time migration from 3D irregular surfaces with near-surface-related deabsorption[J]. GEOPHYSICS,2020,85(1):S21-S32.
APA Xu, Jincheng,Zhang, Jianfeng,Liu, Linong,Zhang, Wei,&Yang, Hui.(2020).Prestack time migration from 3D irregular surfaces with near-surface-related deabsorption.GEOPHYSICS,85(1),S21-S32.
MLA Xu, Jincheng,et al."Prestack time migration from 3D irregular surfaces with near-surface-related deabsorption".GEOPHYSICS 85.1(2020):S21-S32.

入库方式： OAI收割

来源：地质与地球物理研究所

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