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PSDM Technologies


    Orthorhombic Imaging

    Orthorhombic imaging consists of a set of tools that allow azimuthal anisotropy to be incorporated into velocity model building and prestack depth migration. In areas of complex geology, especially where fractures are present, commonly used Tilted Transverse Isotropy (TTI) may not be sufficient for describing moveout variations with azimuth. Orthorhombic anisotropy (ORT) provides a more comprehensive model and orthorhombic migration is able to flatten migration gathers across different azimuth sectors. The orthorhombic model for azimuthal anisotropy includes nine anisotropic parameters

    The next two figures show the comparison of migration gathers produced by TTI and ORT. ORT is able to resolve the conflicting residual moveout and flatten events across different azimuthal sectors.