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- W2335605556 abstract "Seismic arrays permanently installed over an oil-field can record data continuously even in the absence of active seismic shooting. We create Love and Scholte wave virtual seismic sources by seismic interferometry, for four datasets recorded between 2004 and 2010. To use an array for 4D monitoring, we must be able to separate 4D effects due to real changes in the subsurface from 4D effects due to differences in the acquisition. These include changes in the number of live receivers, in the acquisition filter settings, and in the background noise conditions. We examine the results of ambient seismic noise tomography on four datasets that span six years of time and were recorded under a variety of different acquisition filter settings and weather conditions. Portions of the data include various man made noise sources such as airgun surveys at nearby fields. We investigate which subsurface features known from active seismic surveying can be imaged using seismic noise and how stable the results are between the four surveys for data windows of differing lengths. We find that 24 hours of recording, even from datasets years apart, can be used to create stable and repeatable images in an automated way. This introduces the possibility that an in-depth analysis and comparison between datasets might reveal 4D changes reflecting subsurface geological changes." @default.
- W2335605556 created "2016-06-24" @default.
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- W2335605556 date "2013-08-19" @default.
- W2335605556 modified "2023-10-16" @default.
- W2335605556 title "Repeatability analysis of ambient-seismic-noise tomography on four Valhall data sets, 2004-2010" @default.
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- W2335605556 doi "https://doi.org/10.1190/segam2013-0427.1" @default.
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