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oa A Case History of Broadband Processing of West of Shetland Data
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, EAGE/SPG Workshop on Broadband Seismic, Jun 2014, cp-403-00010
- ISBN: 978-90-73834-93-4
Abstract
A number of approaches to increasing the bandwidth of seismic data have been adopted over recent years and have predominantly focussed on avoiding the reduction in signal strength and hence S/N at the frequencies associated with the receiver ghost notch.. In particular, Williams& Pollatos, 2011, showed test results indicating that a modern, hydrophone only streamer towed deep enough that it is well away from environmental noise, such as sea swell and boat generated noise, can have sufficient S/N to be usable even within the receiver ghost notches. This observation relies on the sea surface not being a perfect mirror. Grion et al, 2013, showed for a 3D data set from the N. Sea that with a flat cable at 30m the difference in data quality between a 4m sea state and a flat calm was small and that both datasets had usable S/N within the receiver ghost notch. This study again suggests that the sea surface does not behave as a perfect mirror.