Publications

Visco-TTI-elastic FWI using discontinuous galerkin

Ober, Curtis C.; Smith, Thomas M.; Overfelt, James R.; Collis, Samuel S.; von Winckel, Gregory J.; van Bloemen Waanders, Bart G.; Downey, Nathan J.; Mitchell, Scott A.; Bond, Stephen D.; Aldridge, David F.; Krebs, Jerome R.

The need to better represent the material properties within the earth's interior has driven the development of higherfidelity physics, e.g., visco-tilted-transversely-isotropic (visco- TTI) elastic media and material interfaces, such as the ocean bottom and salt boundaries. This is especially true for full waveform inversion (FWI), where one would like to reproduce the real-world effects and invert on unprocessed raw data. Here we present a numerical formulation using a Discontinuous Galerkin (DG) finite-element (FE) method, which incorporates the desired high-fidelity physics and material interfaces. To offset the additional costs of this material representation, we include a variety of techniques (e.g., non-conformal meshing, and local polynomial refinement), which reduce the overall costs with little effect on the solution accuracy.