We suggest the new elastic orthorhombic (ORT) parameterisation for the multi-parameter full waveform inversion (FWI). The new parameterisation includes 2 seismic velocities and 7 dimensionless parameters that allow for the continuity of the radiation patterns from isotropic to VTI to orthorhombic and elastic models. This continuation offers the possibility of a multi-stage FWI by controlling the step lengths of each parameter. Numerical examples for a simple anticline model are conducted to verify the feasibility of the new parameterisation.
Oh, J. W., & Alkhalifah, T. (2016). A Hierarchical Parameterisation for Elastic Orthorhombic Anisotropic Parameter Inversion. 78th EAGE Conference and Exhibition 2016. doi:10.3997/2214-4609.201601006
We would like to thank KAUST for the financial support and the members of Seismic Wave Analysis Group (SWAG) in KAUST for the helpful discussion. Particularly, we also would like to thank Nabil Masmoudi in KAUST for fruitful comments. We thank the Shaheen II administrator team at KAUST.