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Focusing conditions: a comparison between different Marchenko imaging strategiesNormal access

Authors: G.A. Meles, C. Reinicke, K. Wapenaar, J. Brackenhoff and J.W. Thorbecke
Event name: 80th EAGE Conference & Exhibition 2018 Workshop Programme
Session: WS13: Surface and Internal Multiples - Lose them or Use them?
Publication date: 15 June 2018
DOI: 10.3997/2214-4609.201801960
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 795.88Kb )
Price: € 20

Summary:
Marchenko imaging allows retrieving images from single-sided reflection measurements without artefacts due to internal multiples. A key step in Marchenko imaging is the retrieval of the so-called focusing function from the reflection measurements and a background model. The conventional focusing function obeys a point focusing condition, i.e. it focuses inside the medium of interest both in space and in time. Based on this focusing property one can retrieve up- and downgoing Green’s functions that are associated with a virtual point source or receiver inside the medium, which can be used for imaging. Recently, a new focusing function has been introduced that creates a plane wave instead of a point focus. Using the new focusing function one can retrieve medium responses associated to an up- and downgoing plane wave source or receiver inside the medium, enabling imaging based on plane wave sources. We compare Marchenko imaging using the conventional and the new focusing condition.


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