Gaussian beam prestack depth migration in VTI media
Han Jianguang1,2, Wang Yun3, Zhang Xiaobo4, Xing Zhantao5
1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou 550002, China;
4. Chinese Academy of Geological Sciences, Beijing 100037, China;
5. China Huadian Science and Technology Institute, Beijing 100160, China
Abstract:Based on anisotropic kinematic and dynamic ray tracing systems, a P-wave Gaussian beam prestack depth migration method for VTI media is introduced in this paper. The imaging principle of anisotropic Gaussian beam prestack depth migration is presented on the basis of Gaussian beam prestack depth migration algorithm in isotropic media. For horizontally layered VTI media model, the influence of anisotropic parameters on Gaussian beam prestack depth migration is illustrated. Tests of multi-layer shale model and SEG/Hess model show that the proposed method is an accurate and efficient anisotropic prestack depth migration approach in VTI media.
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