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Kirchhoff prestack depth migration in simple models with differently rotated elasticity tensor: orthorhombic and triclinic anisotropy

VÁCLAV BUCHA
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Department of Geophysics, Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 3, 121 16 Prague 2, Czech Republic. bucha@seis.karlov.mff.cuni.cz,
JSE 2017, 26(1), 1–24;
Submitted: 9 June 2025 | Revised: 9 June 2025 | Accepted: 9 June 2025 | Published: 9 June 2025
© 2025 by the Authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution -Noncommercial 4.0 International License (CC-by the license) ( https://creativecommons.org/licenses/by-nc/4.0/ )
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Abstract

Bucha, V., 2017. Kirchhoff prestack depth migration in simple models with differently rotated elasticity tensor: orthorhombic and triclinic anisotropy. Journal of Seismic Exploration, 26: 1-24. We use ray-based Kirchhoff prestack depth migration to calculate migrated sections in simple anisotropic homogeneous velocity models in order to demonstrate the impact of rotation of the tensor of elastic moduli on migrated images. The recorded wave field is generated in models composed of two homogeneous layers separated by a curved interface. The anisotropy of the upper layer is orthorhombic or triclinic with the rotation of the tensor of elastic moduli. We apply Kirchhoff prestack depth migration to single-layer velocity models with orthorhombic or triclinic anisotropy with a differently rotated tensor of elastic moduli. We show and discuss the errors of the migrated interface caused by incorrect velocity models used for migration. The study is limited to P-waves.

Keywords
3D Kirchhoff prestack depth migration
anisotropic velocity model
rotation of the tensor of elastic moduli
general elastic anisotropy
orthorhombic anisotropy
triclinic anisotropy
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Journal of Seismic Exploration, Electronic ISSN: 0963-0651 Print ISSN: 0963-0651, Published by AccScience Publishing
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