The need to better represent the material properties within the earth's interior has driven the development of higher-fidelity 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.
Presentation Date: Tuesday, October 18, 2016
Start Time: 1:50:00 PM
Location: 146
Presentation Type: ORAL
