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Book Chapter

Seismic monitoring of diffraction images for detection of local heterogeneities

By
Evgeny Landa
Evgeny Landa
Geophysical Institute of Israel, Hamasbir St. 1, P.O. Box 2286, Holon 58122, Israel. E-mail: evgeny@iprg.energy.gov.il.; shemer@iprg.energy.gov.il.
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Shemer Keydar
Shemer Keydar
Geophysical Institute of Israel, Hamasbir St. 1, P.O. Box 2286, Holon 58122, Israel. E-mail: evgeny@iprg.energy.gov.il.; shemer@iprg.energy.gov.il.
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Published:
January 01, 2016

Abstract

Diffracted waves contain valuable information regarding both the structure and composition of the media they are in. In seismic data processing, however, these waves are usually regarded as noise. In this paper, we present an attempt to use scattered/diffracted waves for the detection of local heterogeneities. The method is based on the detection of diffracted waves by concentrating the signal amplitudes from diffracting points on the seismic section. This is done using a correlation procedure that enhances the amplitude of the seismic signal at the location of the diffractors on the common-diffraction-point section (D-section). The new local time correction for diffraction traveltime curve parameterization is based on the radius of curvature of the diffracted wavefront and near-surface velocity.

We use the idea of seismic monitoring for detection and delineating local objects which may occur within the subsurface resulting from human activity or fast geological processes. The method consists of continuous repetition of seismic experiments above an investigated area, constructing D-sections, and comparing the images obtained.

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Contents

Society of Exploration Geophysicists Geophysics Reprint Series

Seismic Diffraction

Kamil Klem-Musatov
Kamil Klem-Musatov
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Henning Hoeber
Henning Hoeber
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Michael Pelissier
Michael Pelissier
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Tijmen Jan Moser
Tijmen Jan Moser
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Society of Exploration Geophysicists
Volume
30
ISBN electronic:
9781560803188
Publication date:
January 01, 2016

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