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Book Chapter

On the relation between seismic interferometry and the migration resolution function

By
Jan Thorbecke
Jan Thorbecke
Delft University of Technology, Department of Geotechnology, Delft, The Netherlands. E-mail: j.w.thorbecke@tudelft.nl; c.p.a.wapenaar@tudelft.nl.
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Kees Wapenaar
Kees Wapenaar
Delft University of Technology, Department of Geotechnology, Delft, The Netherlands. E-mail: j.w.thorbecke@tudelft.nl; c.p.a.wapenaar@tudelft.nl.
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Published:
January 01, 2008

Abstract

Seismic interferometry refers to the process of retrieving new seismic responses by crosscorrelating seismic observations at different receiver locations. Seismic migration is the process of forming an image of the subsurface by wavefield extrapolation. Comparing the expressions for backward propagation known from migration literature with the Green’s function representations for seismic interferometry reveals that these seemingly distinct concepts are mathematically equivalent. The frequency-domain representation for the resolution function of migration is identical to that for the Green’s function retrieved by seismic interferometry (or its square, in the case of double focusing). In practice, they differ because the involved Green’s functions in seismic interferometry are all defined in the actual medium, whereas in migration one of the Green’s functions is defined in a background medium.

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Contents

Society of Exploration Geophysicists Geophysics Reprint Series

Seismic Interferometry: History and Present Status

Kees Wapenaar
Kees Wapenaar
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Deyan Draganov
Deyan Draganov
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Johan O.A. Robertsson
Johan O.A. Robertsson
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Society of Exploration Geophysicists
Volume
26
ISBN electronic:
9781560801924
Publication date:
January 01, 2008

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