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Volume 62, Issue 6
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

Surface‐related multiple elimination is the leading methodology for surface multiple removal. This data‐driven approach can be extended to interbed multiple prediction at the expense of a huge increase of the computational burden. This cost makes model‐driven methods still attractive, especially for the three dimensional case. In this paper we present a methodology that extends Kirchhoff wavefield extrapolation to interbed multiple prediction. In Kirchhoff wavefield extrapolation for surface multiple prediction a single round trip to an interpreted reflector is added to the recorded data. Here we show that interbed multiples generated between two interpreted reflectors can be predicted by applying the Kirchhoff wavefield extrapolation operator twice. In the first extrapolation step Kirchhoff wavefield extrapolation propagates the data backward in time to simulate a round trip to the shallower reflector. In the second extrapolation step Kirchhoff wavefield extrapolation propagates the data forward in time to simulate a round trip to the deeper reflector. In the Kirchhoff extrapolation kernel we use asymptotic Green's functions. The prediction of multiples via Kirchhoff wavefield extrapolation is possibly sped up by computing the required traveltimes via a shifted hyperbola approximation. The effectiveness of the method is demonstrated by results on both synthetic and field data sets.

Copyright © 2014 European Association of Geoscientists & Engineers © 2014 European Association of Geoscientists & Engineers
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/content/journals/10.1111/1365-2478.12137
2014-06-12
2024-04-19

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Internal multiple attenuation by Kirchhoff extrapolation
Geophysical Prospecting 62, 1376 (2014); https://doi.org/10.1111/1365-2478.12137
/content/journals/10.1111/1365-2478.12137
/content/journals/10.1111/1365-2478.12137
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  • Article Type: Research Article
Keyword(s): Attenuation; Extrapolation; Kirchhoff

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