Image-log calibration of fracture-azimuth and fracture-density attributes from OVT prestack depth-migrated data

Abstract

Potentials and limitations for acquisition and processing are examined, given the industry's interest in quantifying orthorhombic anisotropy contained in 3D P-P field data. A field-data case presents one aspect of azimuthal prestack amplitudes and demonstrates these limitations and potentials. Careful amplitude analysis of azimuth-limited near-offset prestack migrated volumes reveals significant azimuthal variations that are consistent with calibration measurements.