Print Email Facebook Twitter A fast 3-D free-surface topography method for acoustic full-waveform inversion Title A fast 3-D free-surface topography method for acoustic full-waveform inversion Author Huiskes, M.J. Plessix, RE Mulder, W.A. (TU Delft Applied Geophysics and Petrophysics; Shell Global Solutions International B.V.) Date 2016 Abstract We propose a finite-difference scheme for the simulation of seismic waves interacting with 3-D freesurface topography. The intended application is velocity model building by acoustic full-waveform inversion (FWI). The scheme follows an immersed boundary approach for wave equations in the firstorder stress-velocity formulation, discretized on a standard staggered grid. Our scheme employs modified 1-D stencils rather than a full 3-D field wavefield extension at the free surface. Although this decreases the accuracy, it improves the scheme's simplicity and robustness. To avoid stability problems, points close to the zero-pressure boundary must be excluded. The scheme, and its adjoint, have been tested by tilted geometry tests and by comparison to a finite-element method. We present a first test result of full-waveform inversion with the new scheme. To reference this document use: http://resolver.tudelft.nl/uuid:16611f85-c7d7-4ede-a34e-17279feaace8 DOI https://doi.org/10.3997/2214-4609.201601664 Publisher EAGE Source 78th EAGE Conference and Exhibition 2016, Vienna, Austria: Workshop 13 "Methods and Challenges of Seismic Wave Modelling for Seismic Imaging Event 78th EAGE Conference and Exhibition 2016, 2016-05-30 → 2016-06-02, Messe Wien, Exhibition and Congress Center, Vienna, Austria Part of collection Institutional Repository Document type conference paper Rights © 2016 M.J. Huiskes, RE Plessix, W.A. Mulder Files PDF EAGE2016_Huiskes_WS13A02.pdf 1.22 MB Close viewer /islandora/object/uuid:16611f85-c7d7-4ede-a34e-17279feaace8/datastream/OBJ/view