Quadrangular adaptive meshing for wave simulation in homogenized media

Marius Rapenne and Guillaume Caumon and Paul Cupillard and Corentin Gouache. ( 2022 )
in: 2022 {RING} {Meeting}, pages 13, ASGA

Abstract

Altough accurate wavefield simulation in complex geological domain has been made possible for about two decades, practical dificulties still exist to generate appropriate meshes discretizing the field properties while ensuring stable and fast simulation. In this work, we combine non periodic homogenization and a new adaptive quadrangular meshing algorithm suitable for spectral element simulation. The algorithm relies on the octree-based method introduced by Mare´chal (2009) to adapt the grid size to the smooth S-wave velocity field. After the octree decomposition, a smoothing is applied to further optimize the size of the elements, which leads to a higher global time-step and, consequently, faster simulations. The application of the proposed method to a 2D section of the homogenized SEG-EAGE overthrust model shows that the adaptive meshes maintain a very good accuracy while being more than twice faster than a simulation in a regular mesh.

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BibTeX Reference

@inproceedings{rapenne_quadrangular_2022,
 abstract = { Altough accurate wavefield simulation in complex geological domain has been made possible for about two decades, practical dificulties still exist to generate appropriate meshes discretizing the field properties while ensuring stable and fast simulation. In this work, we combine non periodic homogenization and a new adaptive quadrangular meshing algorithm suitable for spectral element simulation. The algorithm relies on the octree-based method introduced by Mare´chal (2009) to adapt the grid size to the smooth S-wave velocity field. After the octree decomposition, a smoothing is applied to further optimize the size of the elements, which leads to a higher global time-step and, consequently, faster simulations. The application of the proposed method to a 2D section of the homogenized SEG-EAGE overthrust model shows that the adaptive meshes maintain a very good accuracy while being more than twice faster than a simulation in a regular mesh. },
 author = { Rapenne, Marius AND Caumon, Guillaume AND Cupillard, Paul AND Gouache, Corentin },
 booktitle = { 2022 {RING} {Meeting} },
 pages = { 13 },
 publisher = { ASGA },
 title = { Quadrangular adaptive meshing for wave simulation in homogenized media },
 year = { 2022 }
}