Pseudo-Spectral Modelling of Cracked Anisotropic Media and Rotation of Multicomponent Shear-Wave Data

Kangan Fang

Cracked anisotropic media are modelled with Hudson's theory and the pseudospectral method is used to do the numerical simulation of wave propagation in anisotropic media. New algorithms for the rotation of both the multisource multireceiver (MSMR) and single-source multireceiver (SSMR) shear-wave data are developed and tested on both the synthetic data and field data.

The new algorithm for the rotation of the MSMR data can deal with the situation where the two sources have different wavelet signatures. The rotation algorithms can be used to scan for the rotation parameters, the rotation angle and the time lag between the fast and slow waves. After rotation, the fast and slow shear waves are separated and the attributes of azimuthal anisotropy are estimated.