P15 MULTICOMPONENT SWD G. BERNASCONI M. VASSALLO Abstract 1 Multicomponent seismic provides direct information about both compressional and shear properties of the subsurface. During the drilling process this information can be crucial to predict overpressured zones and to reduce the ambiguity between variations in pore pressure and variations in lithology. We investigate some aspects of the multicomponent processing in SWD acquisitions. We use the radiation pattern of a working roller-cone drill bit to analyze the subsurface illumination in simple models. Then we migrate synthetic data in order to highlight the information that can be recovered by using P- and S-waves


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