Abstract：I put forward a new synthetic method by projecting VSP three-component data in the polarization directions. It works in the following steps:(1)using the model to compute reflection angles corresponding to all sampling points on every trace;(2)to solving for the polarization angle of downgoing P-wave by using the amplitude ratio between the direct waves from the two horizontal components;(3)then to synthesize a new horizontal component by revolving the angle that is independent of time;(4)to obtain the incident angle of direct P-wave by making use of the amplitude ratio between the vertical component of the direct P-wave of three component data and the synthesized horizontal component;(5)to generate WD record of the optimal downgoing wave energy by projecting the three-component data in direct P-wave polarization direction;(6)to create WU record of the optimal upgoing P-wave energy by projecting in the polarization direction of upgoing P-wave.The modules designed in this method have been nicely used in CYBER system and PE8248-GOS system. Trial processing of VSP data at three boreholes brought good listing data and final results. This method greatly improves offset VSP data processing.
