P196 Sensitivity Analysis of Anisotropic Parameters for C-wave Pre-stack Time Migration in the Clair 3D OBC Data Z. Qian* (British Geological Survey) & X. Li (British Geological Survey) SUMMARY We present a sensitivity analysis of the anisotropic parameters used for C-wave Pre-stack Time Migration (PSTM) applied to the Clair 3D OBC data. Though the signal-noise ratio of the data often limits the image quality anisotropy may also play a significant role. From the results of the anisotropic parameter analysis we find that both P-wave and converted S-wave anisotropy decrease with time but the converted S-wave data are affected more by


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