Elastic reverse time migration using a topography flattening scheme

doi:10.6038/cjg2018L0624

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Elastic reverse time migration using a topography flattening scheme
	Hou Jue 1; Liu YouShan 2; Lan HaiQiang 2; Xu Tao 2,3; Bai ZhiMing 2
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2018-04-01
卷号	61 期号:4 页码:1434-1446
关键词	Irregular surface Elastic wave Reverse time migration Boundary conforming grid Finite difference
ISSN号	0001-5733
DOI	10.6038/cjg2018L0624
文献子类	Article
英文摘要	With the steady development of energy and resource exploration, the data processing and interpretation of seismic surveys in rugged mountains, plateaus and basins and other is facing serious challenges. Reverse time migration is one of the most accurate migration methods, which can image the crust and upper mantle structure with high precision. Seismic wavefield extrapolation is the core part of this approach. Because the conventional wavefield extrapolation method is based on the flattening-surface assumption, it often brings loss of precision when dealing with the seismic data acquired in mountainous areas with large topographic relief. To solve this problem, we introduce a parametric method for dealing with the irregular boundary without loss of accuracy: a flattening scheme based on the boundary conforming grid. We study the topography-dependent wave equation, apply the zero-lag normalized cross-correlation imaging condition, and implement the reverse time migration of the elastic wavefield under the irregular surface conditions. First, the standard industrial Marmousi and SEG/Salt models are modified to adapt to undulating surface cases to verify the presented reverse time migration method based on the flattening scheme. Next, we make numerical tests on the Marmousi and SEG/Salt models to show the feasibility of the reverse time migration method based on the boundary conforming grid under the flattening irregular topography. The results indicate that this method can deal with seismic data collected from different types of irregular surfaces, exhibiting a good prospect in the seismic exploration.
WOS关键词	IRREGULAR FREE-SURFACE ; PERFECTLY MATCHED LAYER ; WAVE-FIELD SIMULATION ; 1ST-ARRIVAL TRAVEL-TIMES ; FINITE-DIFFERENCE SCHEME ; FAST MARCHING METHOD ; CURVILINEAR COORDINATE SYSTEM ; BOUNDARY-CONFORMING GRIDS ; FAST SWEEPING SCHEME ; IMAGING CONDITION
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000430371500018
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/88312]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Hou Jue
作者单位	1.China Earthquake Adm, Inst Geophys, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Hou Jue,Liu YouShan,Lan HaiQiang,et al. Elastic reverse time migration using a topography flattening scheme[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2018,61(4):1434-1446.
APA	Hou Jue,Liu YouShan,Lan HaiQiang,Xu Tao,&Bai ZhiMing.(2018).Elastic reverse time migration using a topography flattening scheme.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,61(4),1434-1446.
MLA	Hou Jue,et al."Elastic reverse time migration using a topography flattening scheme".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 61.4(2018):1434-1446.