Abstract：3D,3C VSP data processing is a systematic engineering.Because of speciality of geometry,the VSP data processing can neither use the ordinary non-zero offset multi-component VSP data processing methods,nor use the current land seismic multi-component data processing methods.In that reason,faced with the 3D,3C VSP data characteristics,the paper studied the following aspects:3D VSP velocity analysis,wavefield separation,3D depth imaging of P-wave and PS-converted wave and probed a set of processing methods.The velocity data volume has been gained after the VSP data processing in MB 2003 well-site;the up-going P-wave and PS-converted wave have been successfully separated by 3C data processing and joint wave-field-separation based on Radon transform and polarization analysis;imaging processing of P-wave and PS-converted wave in depth domain have been implemented and both imaging data volumes have been obtained separately according to the results of velocity inversion,which have good correlation and are of benefit to data interpretation,among which the imaging of PS-converted wave showed higher resolution and S/N ratio,which has good applied prospect.
