Cashel SERPENT visit report
Cashel SERPENT visit report
This report presents the initial results from the SERPENT project collaborative research with StatoilHydro
at the Cashel exploration oil well, drilled from the Ocean Vangaurd semisubmersible rig in the North-East
Atlantic off the north-western coast of Ireland. The study was designed to investigate seabed disturbance
resulting from the drilling activities at Cashel and the effects of these activities on the benthic megafaunal
invertebrates.
The Remotely Operated Vehicle (ROV) Magnum 085, was used to take video transects of approximately
100m in length after two phases of drilling. These showed the visible the extent of drill cuttings extended to
60m but megafaunal density was not significantly reduced.
The ROV was also used to carry out in-situ experiments to investigate sublethal effects of exposure to drill
cuttings on Porania pulvillus, the dominant echinoderm at the site. Specimens of P. pulvillus were placed
in chambers within and outside the zone disturbed by cuttings. Following recovery of the specimens tissue
samples were taken for biochemical (glycogen) analysis and histology. The results of these analyses are
reported elsewhere.
National Oceanography Centre
Gates, A.R.
327a3cc6-2e53-4090-9f96-219461087be9
Jones, D.O.B.
44fc07b3-5fb7-4bf5-9cec-78c78022613a
July 2010
Gates, A.R.
327a3cc6-2e53-4090-9f96-219461087be9
Jones, D.O.B.
44fc07b3-5fb7-4bf5-9cec-78c78022613a
Gates, A.R. and Jones, D.O.B.
(2010)
Cashel SERPENT visit report
(National Oceanography Centre Southampton Research and Consultancy Report, 74)
Southampton, UK.
National Oceanography Centre
35pp.
Record type:
Monograph
(Project Report)
Abstract
This report presents the initial results from the SERPENT project collaborative research with StatoilHydro
at the Cashel exploration oil well, drilled from the Ocean Vangaurd semisubmersible rig in the North-East
Atlantic off the north-western coast of Ireland. The study was designed to investigate seabed disturbance
resulting from the drilling activities at Cashel and the effects of these activities on the benthic megafaunal
invertebrates.
The Remotely Operated Vehicle (ROV) Magnum 085, was used to take video transects of approximately
100m in length after two phases of drilling. These showed the visible the extent of drill cuttings extended to
60m but megafaunal density was not significantly reduced.
The ROV was also used to carry out in-situ experiments to investigate sublethal effects of exposure to drill
cuttings on Porania pulvillus, the dominant echinoderm at the site. Specimens of P. pulvillus were placed
in chambers within and outside the zone disturbed by cuttings. Following recovery of the specimens tissue
samples were taken for biochemical (glycogen) analysis and histology. The results of these analyses are
reported elsewhere.
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Published date: July 2010
Additional Information:
Deposited at the authors request
Organisations:
Marine Biogeochemistry
Identifiers
Local EPrints ID: 160925
URI: http://eprints.soton.ac.uk/id/eprint/160925
PURE UUID: 94d29149-7e15-4cbb-9927-489fbb3bfafa
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Date deposited: 21 Jul 2010 12:36
Last modified: 09 Apr 2024 16:31
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Contributors
Author:
A.R. Gates
Author:
D.O.B. Jones
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