Application Of Seismic Interferometry With Non-Physical Reflections Using Near-Surface Seismic Field Data

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Abstract

Seismic interferometry (SI) is a method that retrieves new seismic traces from the cross-correlation of existing traces, where one of the receivers acts as a virtual seismic source whose response is retrieved at other receivers. When using sources only at the surface, and the so-called one-sided illumination of the receivers occurs, we will retrieve not only the desired physical reflections but also non-physical (ghost) reflections. These non-physical reflections appear due to waves that propagate inside a subsurface layer. Thus, they contain information about the seismic properties of the specific layer. We illustrate the technique’s potential using numerically modelled data for a subsurface model with a low-velocity layer, which is also pinching out, and near-surface field data. We apply SI by cross-correlation and auto-correlation. Both resulting non-physical reflections are sensitive to the physical rock properties of the layer that causes them to appear in the SI results. Moreover, non-physical reflections in zero-offset gathers that result from SI by auto-correlation show very good conformity with the geometry of the subsurface layers.
Original languageEnglish
Title of host publication28th European Meeting of Environmental and Engineering Geophysics
Number of pages5
Volume2022
ISBN (Electronic)9789462824256
DOIs
Publication statusPublished - 2022
Event28th European Meeting of Environmental and Engineering Geophysics - Belgrade, Serbia
Duration: 18 Sept 202222 Sept 2022
Conference number: 28

Conference

Conference28th European Meeting of Environmental and Engineering Geophysics
Abbreviated titleNSG 2022
Country/TerritorySerbia
CityBelgrade
Period18/09/2222/09/22

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