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Using laboratory experiments to develop and test new Marchenko and imaging methods

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Original languageEnglish
Title of host publicationSEG Technical Program Expanded Abstracts 2018
Publisher or commissioning bodySociety of Exploration Geophysicists
Pages5520
Number of pages1
Edition2018
DOIs
DateAccepted/In press - 1 Apr 2018
DatePublished (current) - 27 Aug 2018

Publication series

NameSEG Technical Program Expanded Abstracts
PublisherSociety of Exploration Geophysicists
Volume2018
ISSN (Electronic)1949-4645

Abstract

The Marchenko redatuming method estimates surface-to-subsurface Green’s functions. It has been employed to diminishthe effects of multiples in seismic data. Several such methods rely on an absolute scaling of the data; this is usually considered to be known in synthetic experiments, or is estimated using heuristic methods in real data. Here, we show using real ultrasonic laboratory data that the most common of these methods may be ill suited to the task, and that reliable ways to estimate scaling remains unavailable. Marchenko methods which rely on adaptive subtraction may therefore be more appropriate. We present two adaptive Marchenko methods: one is an extension of a current adaptive method, and the other is an adaptive implementation of a non-adaptive method. Our results show that Marchenko methods improve imaging compared to reverse-time migration, but less so than expected. This reveals that some Marchenko assumptions were violated in our experiment and likely are also in seismic data, showing that laboratory experiments contribute critical information to the development and testing of Marchenko-based methods.

    Research areas

  • ultrasonic, autofocusing, imaging, internal multiples, reverse time migration

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