Abstract：Three-component VSP data of P-wave source are applied to fracture detection.The fracture detection involves the following steps:Obtain horizontal component and vertical component by knowing the azimuth of horizontal component of geophone.Separate out P-SV wave.Analyse shear wave splitting in processed data.Ascertain the polarization azimuth of fast shear wave to determine fracture azimuth.Real data processing procedure is described，which includes:Separating out the azimuth-determinative horizontal component，horizontal transverse component and vertical transverse component;inversion of polarization azimuth (fracture azimuth)of fast shear wave at source point.Actuai data analysis shows that the fracture system found out by the method are applicable to description of fractured reservoir.
