On the imaging condition for elastic reverse-time migration

Carlos A. Cunha Filho

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ABSTRACT

Migration-based methods have been proposed recently as a solution for correctly estimating angle-dependent reflectivity in the presence of complex structures. I evaluate the use of different imaging conditions for anisotropic prestack reverse-time migration that aim the estimation of the reflectivity as a function of the local illumination angle. Emphasis is given to a particular imaging criterion that generates four simultaneous images. These images correspond to the in-depth (local) plane-wave response for P-P, P-S, S-P, and S-S modes and can be used in a Zoeppritz-based elastic inversion scheme.