The effect of preconditioning on the LSRTM Article Swipe

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José Falcão Sobrinho , Bruno Silva , Jessé C. Costa ·

YOU? · · 2019 · Open Access · · DOI: https://doi.org/10.22564/16cisbgf2019.312

Least-squares reverse time migration (LSRTM) aims to improve the quality of seismic images by fitting the reflection wavefield with a linearized inverse scattering model, using conjugate gradient (CG) iterations.Due its high computational cost, it is important to accelerate the convergence rate in LSRTM.With this objective we investigate a preconditioner for LSRTM inspired by the asymptotic inverse scattering expression for RTM.The proposed preconditioner can significantly reduce in the number of CG iterations in LSRTM than the more conventional laplacian preconditioner.

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Type: article
Language: en
Landing Page: http://doi.org/10.22564/16cisbgf2019.312
PDF: https://doi.org/10.22564/16cisbgf2019.312
OA Status: gold
References: 11
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DOI: https://doi.org/10.22564/16cisbgf2019.312

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Title: The effect of preconditioning on the LSRTM

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Type: article

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Language: en

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Publication year: 2019

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Publication date: 2019-01-01

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Authors: José Falcão Sobrinho, Bruno Silva, Jessé C. Costa

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Landing page: https://doi.org/10.22564/16cisbgf2019.312

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