VHR Marine 3D Seismics for Shallow Water Investigations: Some Practical Guidelines |
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| Authors: | Tine Missiaen |
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| Institution: | (1) Renard Centre of Marine Geology, Department of Geology and Soil Science, University of Gent, Krijgslaan 281-S8, B-9000 Gent, Belgium |
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| Abstract: | The design of very high resolution (VHR) 3D marine surveys not only depends on the theoretical considerations of seismic imaging,
but is also dictated by the field conditions and the available budget. The main geophysical controlling factors include the
depth and dip of the target, and horizontal and vertical resolution. Working in shallow water environments and at high frequencies
will imply constraints on sampling, array directivity and positioning accuracy. In this paper we describe the main requirements
and constraints involved in VHR 3D acquisition. The second part of the paper focuses on the flexible acquisition system “Opus3D”
recently developed for shallow water investigations. The system provides improvements in imaging resolution in a relatively
simple and cost-effective way. Acquisition and positioning constraints limit the system to nearshore studies. The experience
gained from various surveys with this new acquisition system allow us to formulate a number of practical specifications and
guidelines for 3D survey design in shallow water. |
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| Keywords: | Opus3D acquisition 3D seismic shallow water very high resolution |
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