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.
Original language | English |
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Title of host publication | 78th EAGE Conference and Exhibition 2016, Vienna, Austria |
Subtitle of host publication | Workshop 13 "Methods and Challenges of Seismic Wave Modelling for Seismic Imaging |
Publisher | EAGE |
Pages | 1-5 |
Number of pages | 5 |
DOIs | |
Publication status | Published - 2016 |
Event | 78th EAGE Conference and Exhibition 2016 - Messe Wien, Exhibition and Congress Center, Vienna, Austria Duration: 30 May 2016 → 2 Jun 2016 Conference number: 78 http://www.eage.org/sitecore/content/events/home/2016/78th-eage-conference-and-exhibition-vienna-2016?sc_lang=en |
Conference
Conference | 78th EAGE Conference and Exhibition 2016 |
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Abbreviated title | EAGE 2016 |
Country/Territory | Austria |
City | Vienna |
Period | 30/05/16 → 2/06/16 |
Internet address |