LEAST-SQUARES REVERSE-TIME MIGRATION TOWARD "TRUE" REFLECTIVITY

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 REVERSE-TIME MIGRATION TOWARD "TRUE" REFLECTIVITY
	Zhang, Hao 1; Liu, Qiancheng 1,2; Hao, Jun 3
刊名	JOURNAL OF SEISMIC EXPLORATION
	2017-04-01
卷号	26 期号:2 页码:183-198
关键词	Lsrtm Linear Inversion Normal-incidence Reflection Coefficient
ISSN号	0963-0651
文献子类	Article
英文摘要	Conventional least-squares reverse time migration (LSRTM) usually aims to improve the quality of seismic image, by removing the acquisition footprint, suppressing migration artifacts, and enhancing resolution. We find that the conventional reflectivity defined in the LSRTM is related to the normal-incidence reflection coefficient and the background velocity. Compared with the defined reflectivity, our inverted result is approximate. With reflected data, LSRTM is mainly sensitive to impedance perturbations. According to an approximate relationship between them, we reformulate the perturbation-related system into a pseudo reflection-coefficient related one. Then, we seek the inverted image through linearized iteration. With the assumption that the density varies gradually compared to the migration velocity, only the knowledge of the velocity is required, although the reflected waves are produced at impedance discontinuities. We validate our scheme using the 2D Marmousi synthetic dataset.
WOS关键词	WAVE-EQUATION ; INVERSION ; VELOCITY
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	GEOPHYSICAL PRESS
WOS记录号	WOS:000400879100005
资助机构	National Natural Science Fund of China(41574135) ; National Major Project of China(2016ZX05008-007) ; National Natural Science Fund of China(41574135) ; National Major Project of China(2016ZX05008-007) ; National Natural Science Fund of China(41574135) ; National Major Project of China(2016ZX05008-007) ; National Natural Science Fund of China(41574135) ; National Major Project of China(2016ZX05008-007)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/52904]
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, Hao
作者单位	1.Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 2.King Abdullah Univ Sci & Technol, Thuwal, Saudi Arabia 3.PetroChina, Res Inst Petr Explorat & Dev, Haidong, Qinghai, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Hao,Liu, Qiancheng,Hao, Jun. LEAST-SQUARES REVERSE-TIME MIGRATION TOWARD "TRUE" REFLECTIVITY[J]. JOURNAL OF SEISMIC EXPLORATION,2017,26(2):183-198.
APA	Zhang, Hao,Liu, Qiancheng,&Hao, Jun.(2017).LEAST-SQUARES REVERSE-TIME MIGRATION TOWARD "TRUE" REFLECTIVITY.JOURNAL OF SEISMIC EXPLORATION,26(2),183-198.
MLA	Zhang, Hao,et al."LEAST-SQUARES REVERSE-TIME MIGRATION TOWARD "TRUE" REFLECTIVITY".JOURNAL OF SEISMIC EXPLORATION 26.2(2017):183-198.