CDP mapping in tilted transversely isotropic (TTI) media. Part II: Velocity analysis by combining CDP mapping with a genetic algorithm

	CDP mapping in tilted transversely isotropic (TTI) media. Part II: Velocity analysis by combining CDP mapping with a genetic algorithm
	Qin, YL ; Zhang, ZJ ; Xu, SH
刊名	GEOPHYSICAL PROSPECTING
	2003-07-01
卷号	51 期号:4 页码:325-332
ISSN号	0016-8025
文献子类	Article
英文摘要	This paper presents a method for velocity analysis in tilted transversely isotropic (TTI) media by combining CDP mapping with a genetic algorithm. CDP mapping is a velocity analysis method for determining anisotropic velocity but has difficulties due to the following factors: (i) it involves a non-linear and multimodal objective function; (ii) it is prohibitively expensive in the evaluation of candidate solutions, which often involves the calculation of images in the depth domain; (iii) there is often a very large parameter space. Recognizing the global and multimodal nature of the problem, a genetic algorithm is employed to search for the optimal velocity model. The efficiency of the method contributes to two critical processes: rapid model evaluation, achieved by generating CDP mapping only in the neighbourhood of specific reflectors, and fast computation, based on Fermat's principle, of the CDP points and traveltimes in TTI media. The method produces subsurface structure images in the depth domain, and can also solve for Thomsen's anisotropic parameters (epsilon and delta), the vertical velocity and the dip of the symmetry axis in the model space, simultaneously.
WOS关键词	REFLECTION TRAVEL-TIMES ; INVERSION ; MIGRATION ; ANISOTROPY ; SYMMETRY ; EXAMPLE ; CRUST ; AXIS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	BLACKWELL PUBLISHING LTD
WOS记录号	WOS:000184268000006
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/78146]
专题	中国科学院地质与地球物理研究所
通讯作者	Qin, YL
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Sinopec Star Petr Co Ltd, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Qin, YL,Zhang, ZJ,Xu, SH. CDP mapping in tilted transversely isotropic (TTI) media. Part II: Velocity analysis by combining CDP mapping with a genetic algorithm[J]. GEOPHYSICAL PROSPECTING,2003,51(4):325-332.
APA	Qin, YL,Zhang, ZJ,&Xu, SH.(2003).CDP mapping in tilted transversely isotropic (TTI) media. Part II: Velocity analysis by combining CDP mapping with a genetic algorithm.GEOPHYSICAL PROSPECTING,51(4),325-332.
MLA	Qin, YL,et al."CDP mapping in tilted transversely isotropic (TTI) media. Part II: Velocity analysis by combining CDP mapping with a genetic algorithm".GEOPHYSICAL PROSPECTING 51.4(2003):325-332.