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Analysis of direction-decomposed and vector-based elastic reverse time migration using the Hilbert transform

文献类型：期刊论文

作者Hu, Ting1,2,3; Liu, Hong1,2,3; Guo, Xuebao1,2,3; Yuan, Yuxin1,2,3; Wang, Zhiyang1,2,3
刊名GEOPHYSICS
出版日期2019-11-01
卷号84期号:6页码:R599-R617
ISSN号0016-8033
DOI10.1190/GEO2018-0324.1
英文摘要Straightforward implementations of elastic reverse time migration (ERTM) often produce imaging artifacts associated with incorrectly imaged mode conversions, crosstalk, and back-scattered energies. To address these issues, we introduced three approaches: (1) vector-based normalized crosscorrelation imaging conditions (VBNICs), (2) directional separation of wavefields to remove low-wavenumber noise, and (3) postimaging filtering of the dip-angle gathers to eliminate the artifacts caused by nonphysical wave modes. These approaches are combined to create an effective ERTM workflow that can produce high-quality images. Numerical examples demonstrate that, first, VBNICs can produce correct polarities for PP/PS images and can compute migrated dip-angle gathers efficiently by using P/S decomposed Poynting vectors. Second, they achieve improved signal-to-noise and higher resolution when performing up/down decomposition before applying VBNICs, and left/right decomposition enhances steep dips imaging at the computational cost of adding the Hilbert transform to a spatial direction. Third, dip filtering using slope-consistency analysis attenuates the remaining artifacts effectively. An application of the SEG advanced modeling program (SEAM) model demonstrates that our ERTM workflow reduces noise and improves imaging ability for complex geologic areas.
WOS关键词WAVE-FIELD SEPARATION ; COMMON-IMAGE GATHERS ; S-WAVE ; ANGLE GATHERS ; PHASE ; SCALAR ; DOMAIN ; PRESTACK ; EXTRAPOLATION ; 2D
资助项目National Natural Science Foundation of China[41630319] ; Major State Research Development Program of China[2016YFC0601101] ; China National Petroleum Corporation
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000501594400007
出版者SOC EXPLORATION GEOPHYSICISTS
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Major State Research Development Program of China ; Major State Research Development Program of China ; Major State Research Development Program of China ; Major State Research Development Program of China ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Major State Research Development Program of China ; Major State Research Development Program of China ; Major State Research Development Program of China ; Major State Research Development Program of China ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Major State Research Development Program of China ; Major State Research Development Program of China ; Major State Research Development Program of China ; Major State Research Development Program of China ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Major State Research Development Program of China ; Major State Research Development Program of China ; Major State Research Development Program of China ; Major State Research Development Program of China ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation
源URL[http://ir.iggcas.ac.cn/handle/132A11/95830]  
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Hu, Ting
作者单位1.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Hu, Ting,Liu, Hong,Guo, Xuebao,et al. Analysis of direction-decomposed and vector-based elastic reverse time migration using the Hilbert transform[J]. GEOPHYSICS,2019,84(6):R599-R617.
APA Hu, Ting,Liu, Hong,Guo, Xuebao,Yuan, Yuxin,&Wang, Zhiyang.(2019).Analysis of direction-decomposed and vector-based elastic reverse time migration using the Hilbert transform.GEOPHYSICS,84(6),R599-R617.
MLA Hu, Ting,et al."Analysis of direction-decomposed and vector-based elastic reverse time migration using the Hilbert transform".GEOPHYSICS 84.6(2019):R599-R617.

入库方式： OAI收割

来源：地质与地球物理研究所

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