A modified EOM method for PS-wave migration

Yun Wang; Wei Wang; Junjie Yin

doi:10.1071/EG11019

ISSN: 0812-3985
E-ISSN: 1834-7533

A modified EOM method for PS-wave migration
Authors Yun Wang^a, Wei Wang^b,d and Junjie Yin^c
View Affiliations Hide Affiliations

^a Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China. ^b The State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China. ^c National Engineering Research Center of Coal Bed Methane Ltd., Beijing 100011, China. ^d Corresponding author. Email: [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 43, Issue 3, Sep 2012, p. 156 - 161
DOI: https://doi.org/10.1071/EG11019
- Received: 25 Apr 2011
- Accepted: 03 Apr 2012
- Published online: 01 Sep 2012

Abstract

[

A modified EOM method is developed for PS-wave migration based on the equivalent offset migration (EOM) for P-waves and an equivalent PS-wave velocity. A 2D3C seismic case study shows that the method can give better imaging quality than the conventional CCP method by reducing discretisation errors and suppressing noise.

A modified EOM method is developed for PS-wave migration based on the equivalent offset migration (EOM) for P-waves. This gives better imaging quality than the previous EOM methods by reducing errors from the discretisation of equivalent offsets and suppressing noise from the co-location of source-receiver. An equivalent PS-wave velocity is also introduced. Processing real 2-dimensional 3-component seismic data shows that the method can produce a better migrated image than the conventional common conversion point (CCP) method.

]

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References

Aki, K., and Richards, P., 1980, Quantitative seismology, Vol. 2: W. H. Freeman.
Bancroft, J. C., and Wang S., 1994, Converted-wave prestack migration and velocity analysis by equivalent offsets and CCP gathers. CREWES Research Report, 6: 28.1–28.7.
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A modified EOM method for PS-wave migration

Exploration Geophysics 43, 156 (2012); https://doi.org/10.1071/EG11019

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Article Type: Research Article

Keyword(s): co-location; common conversion point; discretisation; equivalent offset; PS-wave

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A modified EOM method for PS-wave migration

Abstract

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