ESTIMATION OF VTI PARAMETERS USING SLOWNESS-POLARIZATION INVERSION OF P- AND SV-WAVES

摘要

Ignoring anisotropy may cause serious distortions in the results of seismic data processing and interpretation. Although P-wave data provide valuable information for estimating anisotropy parameters, important additional constraints can be obtained from shear waves. Here, we present an extension of the slowness-polarization method for VSP data, in which we combine the vertical slownesses and polarization angles of P- and SV-waves. The algorithm is developed for VTI (transversely isotropic with a vertical symmetry axis) media, but it can be generalized for azimuthally anisotropic models.