The Virtual Source Method – Verifying the concept using numerical and physical modelling

Matthew J. Saul; Bruce Hartley; Brian Evans

doi:10.1071/ASEG2007ab127

ISSN: 2202-0586
E-ISSN:

oa The Virtual Source Method – Verifying the concept using numerical and physical modelling
Authors Matthew J. Saul^a, Bruce Hartley^b and Brian Evans^c
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^a Curtin University, , PO Box U1987, Perth, , Australia, [email protected] ^b Curtin University, , PO Box U1987, Perth, [email protected] ^c Curtin University, , PO Box U1987, Perth, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2007, Issue ASEG2007 - 19th Geophysical Conference, Dec 2007, p. 1 - 6
DOI: https://doi.org/10.1071/ASEG2007ab127
- Published online: 01 Dec 2007

Abstract

Summary

The Virtual Source Method (VSM) has been proposed for removing the effects caused by heterogeneities in the near surface. The method involves acquisition geometries similar to that of VSP, with receivers below the most troublesome part of the overburden. The time reversal principal is utilised to focus down-going energy through the overburden into useful primary energy at the virtual source location. The time reversal process is performed during data processing, and requires no knowledge of the velocity model between sources and sub-surface receivers. The result is a downward continued-dataset with virtual sources at the sub-surface receiver locations. The concept is verified using numerical and physical modelling, which demonstrates that the method can be used to accurately detect reflectors at depth, where conventional seismic fails.

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References

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Bakulin, A., Mateeva, K., Mehta, P., Jorgensen, J., Ferrandis, I., Sinha Herhold, and J. Lopez., 2007, virtual source applications to imaging and reservoir monitoring: The Leading Edge, 26, 6, 732-740.
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Article Type: Research Article

Keyword(s): cross-correlation; heterogeneities.; time reversal; Virtual Source Method; VSP

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