Reverse-Time Migration Using Pseudo-Spectral Method for Tilted TI Media
详细信息
- 责任者：Wang Weiguo (Guangzhou Marine Geological Survey ; Guangzhou 510760 ; China) ; Xiong Shuijin
- 刊名：Oil Geophysical Prospecting
- 出版年：2012
- 卷期：47(4)
- 关键词：地震偏移 ; seismic migration ; 各向异性 ; anisotropy ; 伪谱法 ; pseudo-spectral methods
- 页码：p.566-572
- 图表：3 illus., 1 table, 21 refs.
- 分类号：1600
- issnNo：ISSN1000-7210
- isbnNo：CN13-1095/TE
摘要
Based on Thomsen’s accurate phase velocity formula and weak anisotropic assumption,an approximate phase velocity formula in TTI media is derived in this paper by expanding the phase velocity formula in VTI media.Using this approximate phase velocity formula to wave equation,P-wave equation is derived.Pseudo-spectral method is employed to forward simulating and reverse-time migration(RTM).Comparing isotropic pre-stack depth migration in F-X domain with RTM,the following indications are obtained: ①For anisotropic media,migration results by isotropic algorithms may have visible error,and this will cause imaging problems.②With the consideration of cost,efficiency and accuracy,it is a good idea to use pseudo-spectral method which solved the space derivative problem with FFT instead of RTM.③The approximate wave equation can be well used in TTI media on weak anisotropic assumption.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |