Least-squares migration with a blockwise Hessian matrix: A prestack time-migration approach

doi:10.1190/GEO2018-0533.1

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 > 中国科学院油气资源研究重点实验室

	Least-squares migration with a blockwise Hessian matrix: A prestack time-migration approach
	Jiang, Bowu 1,2; Zhang, Jianfeng 1,2
刊名	GEOPHYSICS
	2019-07-01
卷号	84 期号:4 页码:R625-R640
ISSN号	0016-8033
DOI	10.1190/GEO2018-0533.1
英文摘要	We have developed an explicit inverse approach with a Hessian matrix for the least-squares (LS) implementation of prestack time migration (PSTM). A full Hessian matrix is divided into a series of computationally tractable smallsized matrices using a localized approach, thus significantly reducing the size of the inversion. The scheme is implemented by dividing the imaging volume into a series of subvolumes related to the blockwise Hessian matrices that govern the mapping relationship between the migrated result and corresponding reflectivity. The proposed blockwise LS-PSTM can be implemented in a target-oriented fashion. The localized approach that we use to modify the Hessian matrix can eliminate the boundary effects originating from the blockwise implementation. We derive the explicit formula of the offsetdependent Hessian matrix using the deconvolution imaging condition with an analytical Green's function of PSTM. This avoids the challenging task of estimating the source wavelet. Moreover, migrated gathers can be generated with the proposed scheme. The smaller size of the blockwise Hessian matrix makes it possible to incorporate the total-variation regularization into the inversion, thus attenuating noises significantly. We revealed the proposed blockwise LS-PSTM with synthetic and field data sets. Higher quality common-reflection- point gathers of the field data are obtained.
资助项目	National Natural Science Fund of China[41574135] ; National Natural Science Fund of China[41330316] ; National Major Project of China[2017ZX05008-007]
WOS关键词	WAVE-FORM INVERSION ; LINEARIZED INVERSION ; SEISMIC ILLUMINATION ; IMAGING CONDITION ; OPTIMAL TRANSPORT ; DEPTH-MIGRATION ; AMPLITUDE ; SHOT ; IMPLEMENTATION ; COMPENSATION
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SOC EXPLORATION GEOPHYSICISTS
WOS记录号	WOS:000480678900057
资助机构	National Natural Science Fund of China ; National Natural Science Fund 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 Major Project of China ; National Major Project 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 Natural Science Fund of China ; National Natural Science Fund of China ; National Major Project of China ; National Major Project of China
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/93351]
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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Bowu,Zhang, Jianfeng. Least-squares migration with a blockwise Hessian matrix: A prestack time-migration approach[J]. GEOPHYSICS,2019,84(4):R625-R640.
APA	Jiang, Bowu,&Zhang, Jianfeng.(2019).Least-squares migration with a blockwise Hessian matrix: A prestack time-migration approach.GEOPHYSICS,84(4),R625-R640.
MLA	Jiang, Bowu,et al."Least-squares migration with a blockwise Hessian matrix: A prestack time-migration approach".GEOPHYSICS 84.4(2019):R625-R640.