Client
RWE Renewables
Asset
Sofia OWF
Location
North Sea
Client Challenge
RWE required high-quality geotechnical data to support leg penetration analysis for a jack-up installation barge. The investigation comprised Down-the-Hole CPT boreholes at proposed leg positions, some within 30m of already installed turbine foundations and inter-array cables.
The challenge was to deliver results quickly and safely in a congested construction site, where WTG installation barges, cable-laying vessels, and support vessels were all active. Tight tolerances, weather sensitivity, and the need for near real-time data turnaround further increase operational risk.
How We Helped
Vysus deployed two experienced Offshore Client Representatives (OCR) to oversee the operation and safeguard outcomes. The OCRs provided:
- HSE & assurance oversight: Monitored safety and compliance across all offshore activities, coordinating closely with vessel crew, survey contractor, and client teams.
- Weather risk assessment: Interpreted forecasts and managed safe weather windows to mitigate drift-on risks.
- Data QC: Reviewed CPT execution in real time, enabling onshore engineers to run penetration analysis before vessel demobilisation.
- Adaptive campaign management: adjusted borehole depths live, saving vessel time and cost when competent strata were reached earlier than expected.
- Digital assurance with IRIS: The OCRs used IRIS, Vysus’ GIS-based assurance platform, to independently verify vessel positioning against subsea infrastructure, adding a critical layer of confidence in decision-making.
Powerful Results
- Successful delivery of all CPT boreholes without incident or disruption to nearby assets.
- Optimised vessel time, reducing campaign costs through adaptive depth control and weather-based scheduling.
- Enhanced assurance with IRIS and OCR oversight, safeguarding parallel operations and infrastructures on site.
- Client confidence: Transparent reporting and proactive supervision enabled RWE to progress with installation activities on schedule and with reduced risk
