Statoil Australia ZOCA 95-18 A. S. JPDA ZOCA 95-18 http://www.ga.gov.au/image_cache/GA6117.pdf
Mark Thompson (Statoil, Norway) Visits Vic/Tas-Branch And Shares His Knowledge About Ocean Bottom Seismic Surveys
On 28 March 2007 the Vic/Tas Branch was privileged to have Mark Thompson of Statoil as a guest speaker. While on Holiday in Australia, Mark took the opportunity to touch base with Melbourne’s PESA community and presented a very well received overview of ocean bottom cable seismic data.
Mark, a graduate from Kingston Polytechnic (London) and Imperial College is presently Team Leader at Statoil’s research centre in Trondheim Norway researching 4D acquisition and processing into the use of 4Component OBC for static and dynamic reservoir description working on permanent seismic monitoring and improved reservoir description.
A significant number of oil and gas fields in the North Sea have recently successfully exploited Ocean Bottom Seismic (OBS) to provide improved geological reservoir models. This has in some cases completely changed field reserve estimates and development plans. In all of these cases, conventional narrow-azimuth streamer surveys provided seismic data which were inadequate for mapping major parts of the reservoir and provided reserve estimates with unacceptably high uncertainty values.
In principle, OBS provides several advantages over conventional streamer seismic, such as improved potential for multiple removal and in some cases lower noise levels. However, the major advantage relative to conventional narrow-azimuth seismic surveys is the much improved geometrical arrangement of receivers and sources which are employed in OBS surveys and provide better illumination of the target.
These geometries can, to a certain extent, be implemented using wide-azimuth or multi-azimuth streamer configurations, but industry experience has up to now been limited
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