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.
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.
| Original language | English |
|---|---|
| Title of host publication | Surface and Internal Multiples: Lose them or Use them? Workshop at the 80th annual EAGE meeting |
| Subtitle of host publication | 15 June 2018, Copenhagen, Denmark |
| Number of pages | 4 |
| Publication status | Published - 2018 |
| Event | Surface and Internal Multiples: Lose them or Use them? Workshop at the 80th annual EAGE meeting - Copenhagen, Denmark Duration: 15 Jun 2018 → 15 Jun 2018 https://events.eage.org/en/2018/eage-annual-2018/technical-programme/workshops/workshop-13 |
Workshop
| Workshop | Surface and Internal Multiples |
|---|---|
| Country/Territory | Denmark |
| City | Copenhagen |
| Period | 15/06/18 → 15/06/18 |
| Other | In exploration seismology, most imaging and inversion approaches would not make use of multiple reflections, as such they have long been considered as noise, simply to be removed from the seismic data in a pre-processing step. However, an alternative view is that multiples should be included in imaging, since multiples, along with primary reflections, are an integral part of the physics of wave propagation that describes our seismic response. |
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