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Anisotropic Pre-Stack Depth Migration of Seismic Data: A Case Study in Southwest of Iran

EBRAHIM ZARE1 MOHAMMAD ALI RIAHI2* MAHDI NAZARI SAREM3
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3 Petroleum, Mining, and Materials Engineering, Islamic Azad University, Central Tehran Branch, Tehran, Iran.,
2 Institute of Geophysics University of Tehran, Iran,
JSE 2024, 33(2), 01–13;
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/ )
Abstract

Pre-stack depth migration (PSDM) is a well-known tool for dealing with lateral velocity changes and complex structures. Considering anisotropy in PSDM is particularly important where a significant velocity variation with direction results in inaccurate move correction and erroneous well-tie. Anisotropic PSDM (APSDM) corrects the mispositioning of events and alleviates the hockey sticks on common-depth-point (CDP) gathers due to the anisotropy. In this study, we incorporated anisotropy into the Kirchhoff PSDM of seismic data recorded in Abadan Plain, southwestern Iran. The true depth of the horizons (Markers) of the Well AY1 are used to calculate anisotropic parameters before the APSDM. The results are verified using the markers of another well (Well BZ1). The results of applying the APSDM in the Abadan Plain make this method efficient in correcting the miss position events and addressing the hockey sticks on CDP gathers while ensuring correct subsurface positioning of horizons in the zero-offset section

Keywords
Anisotropy
APSDM
Hockey-sticks
Pre-Stack
Thomson’s parameters
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Journal of Seismic Exploration, Electronic ISSN: 0963-0651 Print ISSN: 0963-0651, Published by AccScience Publishing