Project Overview
A Norwegian-sector offshore platform was failing tightened OSPAR MARPOL discharge limits of <30 mg/L oil-in-water. The existing deoiling hydrocyclones could not keep up with the changing oil-to-water ratio as the field matured. Platform space and weight were severely constrained (350-tonne budget).
The Challenge
Field maturation shifted the inlet OWR and droplet size distribution outside the hydrocyclone's effective range, pushing discharge OiW above 30 mg/L. Adding any conventional secondary stage was blocked by deck space and crane lift limits.
WFS Solution
WFS engineered a compact compact-flotation-unit (CFU) plus polishing media filter package sized to the platform's residual 280-tonne weight allowance. The skid was pre-fabricated and FAT-tested onshore, then craned aboard during a planned shutdown window.
Technologies Applied
- ▸Compact Flotation Unit (CFU)
- ▸Polishing Media Filtration
- ▸Subsea-rated Skid Fabrication
- ▸Modular Topside Integration
Results Achieved
Performance Outcomes
- ✓Outlet OiW consistently <12 mg/L — well inside OSPAR limit
- ✓Net platform weight impact held to 280 tonnes
- ✓Zero unplanned production downtime during install
- ✓Delivered on the operator's original turnaround schedule
Your Project Could Be Next
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