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Acoustic wave propagation simulation by reduced order modelling
Amirkabir Univ Technol, Dept Petr Engn, Tehran 158754413, Iran.
Amirkabir Univ Technol, Dept Petr Engn, Tehran 158754413, Iran;Univ Tehran, Inst Geophys, Tehran 141556466, Iran.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics. Univ Tehran, Inst Geophys, Tehran 141556466, Iran.
Sharif Univ Technol, Dept Aerosp Engn, Tehran 1136511155, Iran.
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2018 (English)In: Exploration Geophysics, ISSN 0812-3985, E-ISSN 1834-7533, Vol. 49, no 3, p. 386-397Article in journal (Refereed) Published
Abstract [en]

Wave propagation simulation, as an essential part of many algorithms in seismic exploration, is associated with high computational cost. Reduced order modelling(ROM) is a known technique in many different applications that can reduce the computational cost of simulation by employing an approximation of the model parameters. ROM can be carried out using different algorithms. The method proposed in this work is based on using the most important mode shapes of the model, which can be computed by an efficient numerical method. The numerical accuracy and computational performance of the proposed method were investigated over a simple synthetic velocity model and a portion of the SEG/EAGE velocity model. Different boundary conditions were discussed, and among them the random boundary condition had higher performance for applications like reverse time migration (RTM). The capability of the proposed method for RTM was evaluated and confirmed by the synthetic velocity model of SEG/EAGE. The results showed that the proposed ROM method, compared with the conventional finite element method (FEM), can decrease the computational cost of wave propagation modelling for applications with many simulations like the reverse time migration. Depending on the number of simulations, the proposed method can increase the computational efficiency by several orders of magnitudes.

Place, publisher, year, edition, pages
CSIRO PUBLISHING , 2018. Vol. 49, no 3, p. 386-397
Keywords [en]
acoustic wave propagation simulation, finite element method (FEM), reduced order modelling (ROM), seismic modelling
National Category
Computational Mathematics
Identifiers
URN: urn:nbn:se:uu:diva-359661DOI: 10.1071/EG16144ISI: 000435194900012OAI: oai:DiVA.org:uu-359661DiVA, id: diva2:1245595
Available from: 2018-09-05 Created: 2018-09-05 Last updated: 2018-09-05Bibliographically approved

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Shomali, Zaher Hossein

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