Horizon Geosciences’ revolutionary, 200kN Seabed CPT system was used recently with great success on a complex geotechnical site investigation for Vattenfall, offshore Denmark. Horizon’s scope of work centred around turbine locations in the North Sea windfarm as well as infield cable routes. The program of work included downhole sampling and CPT testing, seismic CPT testing, pressuremetre testing, P-S Logging, vibrocoring and seabed CPTs.
Project Manager for Vattenfall, Mr Wolfekart Semm confirmed;
“Works conducted included 7 combined geotechnical sampling boreholes. Seabed CPT testing in excess of 1300m was completed.”
Horizon’s digital CPT System is designed to achieve a continuous profile to depths in excess of 40m into the ground. Senior Project Manager for Horizon Geosciences Limited, Mr. John Cudden highlighted the importance of this feature;
“Building an accurate ground model is crucial to the development of offshore wind farms, therefore a high volume of quality CPT data is needed, often within tight timescales. This is where Horizon’s 200kN CPT can surpass traditional drilling expectations in terms of production and cost.
Coupled with the ability to conduct seismic CPT tests with this seabed system, tied in to pressuremeter and borehole logging data from adjacent boreholes, we provide the data for the full determination of both lateral and horizontal engineering properties across the site.”
The 200kN Seabed CPT System can be deployed from any DP1 or DP2 vessel, the Horizon Geobay was assigned in this case due to her full Geophysical and Geotechnical spreads, containerized laboratory and capacity to operate in shallower waters.
Project Manager for Vattenfall, Mr Wolfekart Semm concluded;
“ The Horizon Geobay was used as a platform throughout the whole campaign and has proven to be a very capable DP2 vessel, especially as shallow water conditions were prevalent. All operations were conducted safely and in-line with HSE requirements with a very positive HSE attitude and awareness of safety shown by the entire crew.”
Visit Horizon Geosciences on stand H350 to find out more about this project, the Horizon Geobay and their continued work in the Renewables and Oil & Gas sectors in the North Sea and beyond.
Source: Ocean News & Technology