Baltica 9 Offshore Wind Farm — Geophysical Data Analysis
Industry: Offshore Wind
Location: Southern Baltic Sea, Polish Exclusive Economic Zone — Słupsk Bank, approx. 50–55 km from the Polish shoreline
Year: 2025
Project Overview
Sea Clouds prepared the integrated Geophysical Data Analysis Report for the Baltica 9 Offshore Wind Farm, supporting the planning of the geotechnical investigation campaign in the Polish Exclusive Economic Zone. Working as a specialist subcontractor to the survey contractor, our team analysed the complete geophysical dataset — multibeam bathymetry, side-scan sonar, sub-bottom profiler, magnetometer and ultra-high-resolution seismic — and delivered a site-specific evaluation for 18 planned geotechnical locations. For each site the report integrates data analysis, geohazard and shallow gas assessment, risk assessment and drill site assessment, concluding with a safe / caution / exclusion zone classification and recommendations. The analysis goes beyond the content of the individual ALARP cards and was delivered within four weeks.
Scope of Work
- Integrated analysis of the full geophysical dataset in a GIS environment, including validation and cross-checking of data integrity
- Geohazard assessment covering natural hazards — shallow gas, boulders, hard seabed and seabed slope
- Geohazard assessment covering anthropogenic hazards — potential UXO, subsea cables and pipelines, wrecks and debris
- Shallow gas assessment based on UHRS and MBES interpretation, supported by seismic attribute analysis
- Risk assessment with likelihood-of-encounter scoring in line with IOGP practice
- Drill site assessment covering geological, geophysical, environmental and operational suitability
- Site-specific conclusions, mitigation measures and alternative location proposals along the survey lines
Deliverables
- Baltica 9 Geophysical Data Analysis Report, issued through three review revisions
- Site-specific evaluation for 18 geotechnical locations — 6 borehole and 12 CPT sites
- Shallow gas assessment with likelihood classification for each location
- Drill site classification — safe, caution or exclusion zone — with recommendations
Collaboration
- PGE Baltica (Developer)
- Geo Ingenieurservice Polska (Survey Contractor — Sea Clouds' direct client)
- Sea Clouds sp. z o.o. (geophysical data analysis and reporting)
Project Scale
- Duration: September – October 2025, delivered in four weeks
- 177 office-based man-hours across reporting lead, geophysicist and GIS roles
- 18 geotechnical locations assessed — 6 borehole and 12 CPT sites
- 5 geophysical datasets integrated: MBES, SSS, SBP, MAG and UHRS
- Report issued through three review revisions within the delivery window
