Wavefield Decomposition by 3-D/3-C Inversion Process in Tau-P Domain

P103 WAVEFIELD DECOMPOSITION BY 3-D/3-C INVERSION PROCESS IN TAU-P DOMAIN 1 JACQUES BLANCO and GUY CANADAS UMR 5831 TotalFinaElf Pau France Abstract The separation of interfering complex wavefields is one of the key points in borehole seismic processing. Several authors have discussed the problem of achieving this satisfactorily mainly by considering only specular propagation to separate the upgoing and downgoing wavefields. Because scattered wavefields are not only due to specular but also diffracted and refracted propagation the method described here is based on a decomposition of 3-D and 3-C data into small local plane events allowing the classification of any