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Focusing Properties of Kirchhoff Migration
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Saint Petersburg 2020, Nov 2020, Volume 2020, p.1 - 6
Abstract
Summary
The seismic source generates waves that travel into the subsurface, where they interact with inhomogeneities. The types of such interaction are scattering (or diffraction) and reflection. The problem of imaging of small objects producing diffracted waves is often considered in the geophysical literature. Before migration, wavefield separation is to be performed. Otherwise, in case the conventional migration operator is applied to the mixture of the wavefields, the result will be contaminated with artefacts. A special focusing operator should be applied for diffracted waves imaging. Such operator, being applied to the mixture of the wavefields, will distort the image of reflectors.
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