P117 PROCESSING AND ANALYSIS OF PS-WAVE DATA FROM A 3-D/3-C LAND SURVEY FOR FRACTURE CHARACTERIZATION Summary 1 The investigation of S-wave birefringence (splitting) using 3-D converted P to S-waves (PS-waves) is an important tool for characterizing reservoir fractures. In azimuthally anisotropic media fracture intensities are directly related to traveltime differences between the fast and slow S-waves and fracture orientations are related to the polarization direction of the fast S-wave. These effects are accurately analyzed in a 3-D/3-C survey from the Green River basin in Wyoming to preserve meaningful azimuthal variation in amplitude and traveltime. Estimates of the principal PSwave fast


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