A 3D pseudo-spectral method for SH wave simulation in heterogeneous media
- Junxiao Li (Dept. of Geoscience, CREWES Project, University of Calgary, Calgary AB) | Kristopher A. Innanen (Dept. of Geoscience, CREWES Project, University of Calgary, Calgary AB) | Guo Tao (Dept. of Petroleum Geoscience, The Petroleum Institute, Abu Dhabi, UAE)
- Document ID
- Society of Exploration Geophysicists
- 2018 SEG International Exposition and Annual Meeting, 14-19 October, Anaheim, California, USA
- Publication Date
- Document Type
- Conference Paper
- 2018. Society of Exploration Geophysicists
- Modeling, VTI, Wave propagation, 3D
- 0 in the last 30 days
- 15 since 2007
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The second order velocity-displacement SH-wave equation in VTI media is reduced to first order equations. During SH-wave simulation, the spatial derivatives of the new developed first order SH-wave equations are transformed into wavenumber domain and a staggeredgrid Fourier pseudospectral time-domain method is used to obtain discretized forms of these wavenumber operators, which in turn, effectively eliminates the Gibbs phenomenon. The first order velocitydisplacement SH-wave equations also make it possible to set hybrid perfectly matched layers around computational boundaries to mitigate artificial reflections. This new scheme is applied for wavefield modeling in two-layer heterogeneous media. Comparisons of simulation results with pseudo-spectral method using second-order SH-wave equation further verify its accuracy. Finally, SH wavefield simulation in a three-dimensional over-thrust model is illustrated.
Presentation Date: Wednesday, October 17, 2018
Start Time: 9:20:00 AM
Location: Poster Station 19
Presentation Type: Poster
|File Size||827 KB||Number of Pages||5|
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