Oceanic kicked off offshore works for the Porthos project (Port of Rotterdam CO2 Transport and Storage with a special unexploded ordnance survey along the 20-kilometre pipeline route. The “bomb hunt” is one of several important pre-lay activities required before Lorelay can install the 16-inch pipeline. Fortunately, the hi-tech imaging and sonar spread – capable of visualising objects up to 4 metres below the seabed – detected no explosives!

Allseas is the main offshore contractor for Porthos. Our work includes installation, burial and commissioning of the 16-inch pipeline connecting the future compressor station, located at the Maasvlakte, with the P18-A platform offshore.The offshore pipeline is provided with a plastic insulation coating to retain the heat in the pipe and a concrete weight coating for stability on the seabed.

Lorelay will commence pipelay late April with a pull-in to the compressor station, before setting off in the direction of the P18-A platform. Oceanic will provide construction support. The vessels can position precisely and safely in the busy waters around Rotterdam, the busiest and largest port in Europe.

The first carbon capture and storage (CCS) project of its kind in Europe, the pipeline will transport CO₂ captured from industry through the Port of Rotterdam to depleted gas fields in the North Sea. Porthos is a joint venture of EBN, Gasunie and the Port of Rotterdam: Energie Beheer Nederland, Gasunie and Port of Rotterdam. Recognised by the EU as a project of common interest (PCI), the project was made possible by a CEF subsidy from the European Commission.

About Allseas

Allseas Group S.A. is a world-leading contractor in offshore pipeline installation, heavy lift and subsea construction. The company operates a versatile fleet of specialised heavy-lift, pipelay and support vessels, designed and developed in-house.