Applications for vector coordinate systems of converted waves obtained by multicomponent 3-D data

摘要

Recently, 3-D four-component marine ocean-bottom cable (OBC) data has come into broad use for a variety of applications. However, understanding how these new components and their assoicated acquisition and processing coordinate systems are rel;ated to the vector wavefields has become a challenging task for the exploration indsustry. The compres-sioal waveflield (p-wave) is obtained from the pressure re-sponse of the hydrophone plus the particle-motion response from the vertical geophone. A converted P-wave to shear wavefield (PS-wave) is obtained from two horizontal geophone components oriented in an acquiosition coordinate system of in-line and cross-line particle motion. The coordinate system of interest for multicomponent vector wavefields describes the polarization of particle displacement.