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| | Abstract | | Dip filter is widely used in the plane-wave decomposition for seismic exploration data processing. There are many techniques of dip filtering studied so far, and each method has its own characteristic advantages and disadvantages. It is important to examine the method considering the purpose and the exploration environment. In this study, in order to examine the dip-filtering technique for under-water acoustic wave exploration, we apply the dip filters to the real acoustic data of VCS (Vertical Cable Seismic). Because of the similarity of geometric structure to VSP, VSP data processing methods would be available for the analysis of the VCS data. For the methods of dip filtering, we applied F-K filter, SVD, a method proposed by Seeman and Horowicz (1983) and Hilbert transform method and then compare the result of the extraction of intended apparent velocity. After the comparison, we confirmed that the Hilbert transform method is capable of extracting plane-waves which have arbitrary apparent velocities. |
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