Print Email Facebook Twitter The utilization of ghost reflections retrieved by seismic interferometry for layer-specific characterization of the shallow subsurface Title The utilization of ghost reflections retrieved by seismic interferometry for layer-specific characterization of the shallow subsurface Author Shirmohammadi, F. (TU Delft Applied Geophysics and Petrophysics) Draganov, D.S. (TU Delft Applied Geophysics and Petrophysics) Ghose, R. (TU Delft Applied Geophysics and Petrophysics) Date 2024 Abstract Seismic interferometry (SI) retrieves the Green function between two receiver locations using their recordings from a boundary of sources. When using sources and receivers only at the surface, the virtual-source gathers retrieved by SI contain pseudo-physical reflections as well as ghost (non-physical) reflections. These ghost reflections are the results of the cross-correlation or auto-correlation (AC) of primary reflections from two different depth levels, and they contain information about the seismic properties of specific layers in the subsurface. We investigated the application of ghost reflections for layer-specific characterization of the shallow subsurface using SI by AC. First, we showed the technique's potential using synthetic data for a subsurface model with a lateral change in velocity, a gradient in depth for velocity, a thickness change and a velocity change of the target layer. Then, we applied the technique to shallow subsurface field data. We also focused on improving the retrieval of ghost reflections by removing the free-surface multiples and muting undesired events in active-source gathers before applying SI. Our results demonstrate that the ghost reflections can be used advantageously to characterize the layer that causes them to appear in the results of SI. Consequently, they can also provide valuable information for imaging and monitoring shallow subsurface structures. Subject imagingreflectionS-waveseismicvelocity To reference this document use: http://resolver.tudelft.nl/uuid:9beab0e5-fd2d-4541-96ce-1a8cf29a85e7 DOI https://doi.org/10.1002/nsg.12275 ISSN 1569-4445 Source Near Surface Geophysics, 22 (1), 92-105 Part of collection Institutional Repository Document type journal article Rights © 2024 F. Shirmohammadi, D.S. Draganov, R. Ghose Files PDF Near_Surface_Geophysics_- ... ometry.pdf 2.88 MB Close viewer /islandora/object/uuid:9beab0e5-fd2d-4541-96ce-1a8cf29a85e7/datastream/OBJ/view