Numerical modeling of ambient-noise seismic interferometry
Department of Geological and Mining Engineering and Sciences
This numerical modeling study examines the use of seismic interferometry to retrieve weak seismic reflections from background noise, a form of passive monitoring. Assuming we seek reflections from deep noise sources, representing either teleseismic events or local events as expected in a field of active injection, the factors that influence the quality of the retrieved reflections from interferometry include geophone interval, geophone depth, and effect of shallow noise sources. Using model data, geophone interval showed no significant effect on the reflection quality, but buried geophones produce ghost reflections, suggesting that shallow geophones might be optimal. However, using the combination of buried hydrophones and geophones should be able to cancel the ghosting effects. Shallow noise sources produce a destructive effect on the reflections from deeper noise sources and damage the resulting image.
SEG Technical Program Expanded Abstracts 2016
Arogundade, S. M.,
Numerical modeling of ambient-noise seismic interferometry.
SEG Technical Program Expanded Abstracts 2016, 5654.
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