An excitation potential imaging condition for elastic reverse time migration

doi:10.1016/j.jappgeo.2014.07.002

	An excitation potential imaging condition for elastic reverse time migration
	Gu, Bingluo 1,2; Liu, Youshan 1,2; Li, Zhiyuan 1; Ma, Xiaona 1,2; Liang, Guanghe 1
刊名	JOURNAL OF APPLIED GEOPHYSICS
	2014-09-01
卷号	108 页码:124-139
关键词	Elastic reverse time migration Wavefield separating Excitation potential imaging condition Scalar potential Vector potential
ISSN号	0926-9851
DOI	10.1016/j.jappgeo.2014.07.002
文献子类	Article
英文摘要	Elastic reverse time migration (ERTM) has been demonstrated to be more accurate than scalar RTM. However, low efficiency (large storage and heavy calculated amount) and strong artifacts caused by the crosstalk between different wave modes are the two primary barriers to the application of the ERTM during the processing of real data. The scalar (P) and vector (S) potentials of the elastic wavefield and the arrival times corresponding to the first energy extremum of the wavefield are saved at each grid point during the forward modeling of the source wavefield. The angle-dependent reflection coefficient images are subsequently obtained by dividing the scalar and vector potentials of the backward extrapolated receiver wavefield by the saved scalar and vector potentials at the grid points that satisfy the image time at each time step, respectively. The proposed imaging condition does not need to store the snapshots of the source wavefield, while it can considerably improve the computational efficiency and decrease the amount of storage and Input/Output manipulation (compared with the cross-correlation imaging condition) in addition to suppressing the crosstalk between compressive and shear wave modes. Compared with the excitation time imaging condition, the proposed imaging condition reduces the energy loss caused by the opposite polarity of the horizontal component at opposite sides of the source in stacked images. Numerical tests with synthetic data of the Sigsbee2a model have demonstrated that this imaging condition is a cost-effective and practical imaging condition for use in prestack ERTM. (C) 2014 Elsevier B.V. All rights reserved.
WOS关键词	WAVE-EQUATION MIGRATION ; DEPTH MIGRATION ; SEISMIC DATA ; ONE-WAY ; PRESTACK ; DOMAIN ; PRINCIPLE
WOS研究方向	Geology ; Mining & Mineral Processing
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000340987600015
资助机构	R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06) ; R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06) ; R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06) ; R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06) ; R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06) ; R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06) ; R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06) ; R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06) ; R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06) ; R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06) ; R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06) ; R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06) ; R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06) ; R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06) ; R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06) ; R&D of Key Instruments and Technologies for Deep Resources Prospecting (the National R&D Projects for Key Scientific Instruments)(ZDYZ2012-1-06)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84790]
专题	中国科学院地质与地球物理研究所
通讯作者	Gu, Bingluo
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Gu, Bingluo,Liu, Youshan,Li, Zhiyuan,et al. An excitation potential imaging condition for elastic reverse time migration[J]. JOURNAL OF APPLIED GEOPHYSICS,2014,108:124-139.
APA	Gu, Bingluo,Liu, Youshan,Li, Zhiyuan,Ma, Xiaona,&Liang, Guanghe.(2014).An excitation potential imaging condition for elastic reverse time migration.JOURNAL OF APPLIED GEOPHYSICS,108,124-139.
MLA	Gu, Bingluo,et al."An excitation potential imaging condition for elastic reverse time migration".JOURNAL OF APPLIED GEOPHYSICS 108(2014):124-139.