Skip to Main Content
Book Chapter

Diffraction problems of 3D seismic imaging

By
B.R. Zavalishin
B.R. Zavalishin
Russian State University of Oil and Gas, 65 Leninsky prospekt, Moscow 117296, Russia.
Search for other works by this author on:
Published:
January 01, 2016

Abstract

Migration is essential to seismic imaging. It is carried out by backward extrapolation of the wavefield registered on the observation surface. The quality of images depends on the accuracy of the wavefield reconstruction at interior subsurface points. From the theory based on the exact solution of the scalar wave equation it is known that, for accurate wave extrapolation, data must be obtained from an infinite observation surface. Limiting of migration apertures, which is inevitable in practice, leads to artefacts in extrapolated fields. The distortion they cause in 2D and 3D imaging is different. In 2D migration, the artefacts known as truncation effects are much weaker than the signals being extrapolated and for this reason attract no special attention. In 3D migration, diffractions caused by an aperture edge are stronger and may create serious problems. For a circular aperture, their amplitudes are comparable to the amplitudes of the signals themselves. The study of aperture diffractions is intended to help in the search for ways of either suppressing them efficiently or deliberately utilizing them in order to improve imaging.

In optics, diffractions by an aperture play a constructive role in image making. This research shows that the same may take place in seismic imaging.

You do not currently have access to this article.

Figures & Tables

Contents

Society of Exploration Geophysicists Geophysics Reprint Series

Seismic Diffraction

Kamil Klem-Musatov
Kamil Klem-Musatov
Search for other works by this author on:
Henning Hoeber
Henning Hoeber
Search for other works by this author on:
Michael Pelissier
Michael Pelissier
Search for other works by this author on:
Tijmen Jan Moser
Tijmen Jan Moser
Search for other works by this author on:
Society of Exploration Geophysicists
Volume
30
ISBN electronic:
9781560803188
Publication date:
January 01, 2016

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal