Wavefield Decomposition using Spectral Matrix Techniques

M. J. Rutty; G. M. Jackson

doi:10.1071/EG992293

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

Wavefield Decomposition using Spectral Matrix Techniques
Authors M. J. Rutty^a and G. M. Jackson^b
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^a School of Earth SciencesFlinders University of South Australia, GPO Box 2100 Adelaide, , SA, 5001, Australia ^b Department of Engineering ScienceUniversity of Oxford, Parks Road Oxford, OX1 3PJ, UK
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 23, Issue 1-2, Mar 1992, p. 293 - 297
DOI: https://doi.org/10.1071/EG992293
- Published online: 01 Mar 1992

Abstract

A spectral matrix technique described by Mari and Gavin has been developed and extended for analysing interfering seismic events. It may be used with both single and multi-component data. Spectral matrix filtering removes random noise and may be used to enhance picked coherent events. This leads to a possible wave-field decomposition procedure for use in separating interfering coherent events.

Conventional event-separation procedures require large geophone arrays to avoid spatial aliasing. Spectral matrix filtering does not require such dense coverage and so may be used in areas where conventional surveys may not be possible. The technique is illustrated using synthetic and physical scale-model data.

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1992-03-01

2026-01-14

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References

Freire, S. L. M., and Ulrych, T. J. (1988). ‘Application of singular value decomposition to vertical seismic profiling’. Geophysics53, 778–785.
Mari, J. L., and Gavin, P. (1990). ‘Separation des ondes P et S a I’aide de la matrice spectrale avec informations a priori’. Revue de I’institute Francais du petrole45, 587–603.
Mari, J. L., and Glangeaud, F. (1990). ‘Spectral matrix filtering applied to VSP processing’. Revue de I’institute Francais du petrole45, 417–434.
Pant, D. R. (1989). ‘Physical seismic modelling: studies in ground roll suppression, reflector resolution and multi-component wavefield separation’. PhD. Thesis, The Flinders University of South Australia.
Pant, D. R., and Greenhalgh, S. A. (1990). ‘A multi-component offset VSP scale model investigation’. Geoexploration26, 191–212.
Rutty, M. J., and Greenhalgh, S. A. (in press). ‘The correlation of seismic events on multi-component data in the presence of coherent noise’. Geophys. J. Int.
Yilmaz, O. (1987). ‘Seismic Data Processing’. Society of Exploration Geophysicists, Tulsa.

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Article Type: Research Article

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Wavefield Decomposition using Spectral Matrix Techniques

Abstract

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