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Volume 68, Issue 6
  • E-ISSN: 1365-2478
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Abstract

ABSTRACT

Seismic images provided by reverse time migration can be contaminated by artefacts associated with the migration of multiples. Multiples can corrupt seismic images, producing both false positives, that is by focusing energy at unphysical interfaces, and false negatives, that is by destructively interfering with primaries. Multiple prediction/primary synthesis methods are usually designed to operate on point source gathers and can therefore be computationally demanding when large problems are considered. A computationally attractive scheme that operates on plane‐wave datasets is derived by adapting a data‐driven point source gathers method, based on convolutions and cross‐correlations of the reflection response with itself, to include plane‐wave concepts. As a result, the presented algorithm allows fully data‐driven synthesis of primary reflections associated with plane‐wave source responses. Once primary plane‐wave responses are estimated, they are used for multiple‐free imaging via plane‐wave reverse time migration. Numerical tests of increasing complexity demonstrate the potential of the proposed algorithm to produce multiple‐free images from only a small number of plane‐wave datasets.

© 2020 European Association of Geoscientists & Engineers © 2020 The Authors. Geophysical Prospecting published by John Wiley & Sons Ltd on behalf of European Association of Geoscientists & Engineers
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2020-05-28
2024-04-25

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Data‐driven retrieval of primary plane‐wave responses
Geophysical Prospecting 68, 1834 (2020); https://doi.org/10.1111/1365-2478.12960
/content/journals/10.1111/1365-2478.12960
/content/journals/10.1111/1365-2478.12960
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  • Article Type: Research Article
Keyword(s): Multiple attenuation; Reverse‐time migration; Seismic imaging

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