SEG Technical Program Expanded Abstracts 2019 2019
DOI: 10.1190/segam2019-3211307.1
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An efficient wavefield inversion for isotropic elastic media

Abstract: Full-waveform inversion (FWI) is a highly non-linear optimization problem which aims at retrieving high-resolution models of the subsurface parameters. Elastic FWI (EFWI) should provide a better representation to the elastic nature of the subsurface than the simple acoustic assumption. However, including elastic parameters in the EFWI requires higher the computational cost and storage memory not to mention the added complexity of dealing with multi parameters and higher nonlinearity in the inversion. To mitiga… Show more

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Cited by 6 publications
(4 citation statements)
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“…In WRI, the wavefield is still highly dependent on the velocity, and this dependency can be mitigated by replacing the velocity with a modified source function, which includes the veloctiy perturbation, we refer to as efficient wavefield inversion (EWI) . EWI is able to calculate the medium parameter perturbations directly, and it also proves its effectiveness in complex media (Song et al 2019a;Song & Alkhalifah 2020a).…”
Section: Introductionmentioning
confidence: 90%
“…In WRI, the wavefield is still highly dependent on the velocity, and this dependency can be mitigated by replacing the velocity with a modified source function, which includes the veloctiy perturbation, we refer to as efficient wavefield inversion (EWI) . EWI is able to calculate the medium parameter perturbations directly, and it also proves its effectiveness in complex media (Song et al 2019a;Song & Alkhalifah 2020a).…”
Section: Introductionmentioning
confidence: 90%
“…There is also another way to invert for the three parameters simultaneously by formulating equation 9 into matrix and vector multiplication for each image point. This method is used in isotropic elastic media to invert for the P-and S-wave velocities (Song et al, 2019a). The reason they use this method is because P-and S-wave velocities equally contribute to the wave propagation in the elastic media.…”
Section: Theorymentioning
confidence: 99%
“…Using a deconvolution process, the velocity perturbation can be calculated directly in one step. This method proves to be effective in complex media, like acoustic VTI media and isotropic elastic media (Song et al, 2019a;Song and Alkhalifah, 2020a). WRI or EWI is able to provide both low and high wavenumber updates (Leeuwen and Herrmann, 2015;Song and Alkhalifah, 2020b).…”
Section: Introductionmentioning
confidence: 99%