Spherical Wave AVO Modelling of Converted Waves in Elastic Isotropic Media

The AVO-response of two layer elastic and isotropic models for AVO-Classes 1 and 3 is investigated for converted waves. Zoeppritz’s reflection coefficients and the Weyl-integral are utilized for the computations. Spherical wave results for Rps and Rpp are compared with plane wave reflectivity. Depth dependence of spherical wave AVO is found to be strongest near critical angles of Class 1. Phase rotation is also observed under these conditions. There is some similarity between Rps and Rpp for Class 1. Normalized Class 3 responses show no depth dependence. There is no similarity between Class 3 Rps and Rpp .