Reverse Time Migration in Tilt Transversely Isotropic(TTI) Media
详细信息
- 责任者：Wang Juan (School of Geosciences ; China University of Petroleum(East China) ; Qingdao 266555 ; China) ; Li Zhenchun
- 刊名：Oil Geophysical Prospecting
- 出版年：2012
- 卷期：47(4)
- 关键词：横向各向同性 ; transverse isotropy ; 地震偏移 ; seismic migration
- 页码：p.573-577
- 图表：2 illus., 12 refs.
- 分类号：1600
- issnNo：ISSN1000-7210
- isbnNo：CN13-1095/TE
摘要
Based on Alkhalifah’s P-SV dispersion relation in VTI media,we apply in this paper pseudo-acoustic approximate to derive the acoustic scalar equations in transversely isotropic(TI) media.Each of these equations is second-order derivative in time and space with no mixing of time and space derivatives,which makes it easier and more efficient to realize finite difference method numerical simulation.Using improved incomplete pseudo-acoustic approximate,we obtain a longer stability simulation time.Wavefield simulation process is more stable compared with the conventional pseudo-acoustic approximation method.Both the finite difference numerical simulation and the complex model test show that the derived pseudo-acoustic scalar equations could accurately describe kinema-tics characteristic of P wave in TI medium,which facilitate efficient anisotropic RTM.
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