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	Imaging diffraction points using the local image matrices generated in prestack migration
	Zhu, Xiaosan ; Wu, Ru-Shan
刊名	geophysics
	2010
关键词	Earth crust geophysical techniques seismic waves DECOMPOSITION PROPAGATORS AMPLITUDE
DOI	10.1190/1.3277252
英文摘要	Energy-angle distributions in the local image matrix, which is a function of local incident and receiving angles at a subsurface point, are different for a planar reflector and a diffraction point. The former exhibits a linear distribution along a certain dip direction, whereas the latter shows a scattered distribution in the entire matrix. Therefore, the singular values of the local image matrix in the local angle domain indicate the energy distribution along different dip directions. The difference between the auto- and crosscorrelation coefficients of the sets of singular values between adjacent image points can be used to distinguish these two types of targets and obtain prestack images which contain only diffraction points. Using three synthetic examples, we found that the method can effectively image diffraction points. Seismic images of diffraction points may provide important information about geological discontinuities and diffraction points can be taken as secondary sources for potential applications in imaging subsalt structures which are poorly illuminated by primary waves.; Geochemistry & Geophysics; SCI(E); EI; 12; ARTICLE; 1; S1-S9; 75
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/311273]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Zhu, Xiaosan,Wu, Ru-Shan. Imaging diffraction points using the local image matrices generated in prestack migration[J]. geophysics,2010.
APA	Zhu, Xiaosan,&Wu, Ru-Shan.(2010).Imaging diffraction points using the local image matrices generated in prestack migration.geophysics.
MLA	Zhu, Xiaosan,et al."Imaging diffraction points using the local image matrices generated in prestack migration".geophysics (2010).

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