A single-sided representation for the homogeneous Green's function, accounting for all multiples
Kees Wapenaar (TU Delft - Applied Geophysics and Petrophysics, ImPhys/Acoustical Wavefield Imaging )
Joeri Brackenhoff (TU Delft - Applied Geophysics and Petrophysics)
Jan Willem Thorbecke (TU Delft - Applied Geophysics and Petrophysics)
Joost van der Neut (ImPhys/Acoustical Wavefield Imaging )
Evert Slob (TU Delft - Applied Geophysics and Petrophysics)
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Abstract
Marchenko imaging is a novel imaging technique that is capable to retrieve images from single-sided reflection measurements free of artefacts related to internal multiples (e.g. Behura et al., 2014; Broggini et al., 2012). An essential ingredient of Marchenko imaging is the so-called focusing function which can
be retrieved from reflection data and a background model. Initially, the focusing function was defined such that it focuses inside the medium of interest as a point in time and in space (e.g. Wapenaar et al., 2014). The focusing property is used to retrieve the up- and downgoing Green’s functions associated to a virtual point source or receiver inside the medium. Subsequently, the retrieved Green’s functions are used to compute an image. Meles et al. (2017) introduced a new focusing function that focuses as a plane wave inside the medium. The new focusing function allows to retrieve medium responses associated to
virtual plane wave sources or receivers inside the medium. Hence, imaging based on areal-sources as suggested by Rietveld et al. (1992) becomes possible including the benefits of the Marchenko method. In the following we compare Marchenko imaging using point and plane wave focusing.