Allseas has successfully completed pipeline installation and post-lay activities for the N05-A natural gas development, a flagship project in the Dutch North Sea led by Dutch energy operator ONE-Dyas.

The N05-A development, located about 20 kilometres north of the islands Schiermonnikoog and Borkum, represents the largest Dutch investment in natural gas in over 15 years and aims to deliver a reliable, cleaner energy supply for Dutch and German households and businesses.

ONE-Dyas entrusted Allseas’ offshore engineering expertise with the installation scope for N05-A’s critical pipeline infrastructure. Our scope included the transport and installation of a 15-kilometer natural gas export pipeline that links the innovative, wind-powered platform to the existing NGT pipeline which runs to Uithuizen.

Our vessel Lorelay executed the shallow water pipelay operations, pipeline burial and pre-commissioning activities, ensuring a seamless project progression.

Meeting tight timelines for reliable energy supply

“With the swift and safe installation of this pipeline, we’re not only helping ONE-Dyas meet their ambitious first-gas timeline, but we’re also supporting an ambitious energy project that’s crucial for the Netherlands,” says Project Manager, Paul van Haestregt.

“This pipeline will deliver reliable and affordable gas to Dutch homes and businesses while also supporting the country’s transition to cleaner energy sources.”

The N05-A project is an innovation in clean gas production. The production hub is powered by offshore wind, making it the most environmentally friendly natural gas development in the North Sea.

The infrastructure is designed to support future development of green hydrogen and carbon capture and storage (CCS) – emerging sectors in which Allseas’ pipeline design and installation expertise is poised to play an important role.

Accelerating the transition to cleaner energy

With 40 years of pipeline installation experience, and over 7000 kilometers of pipeline in the North Sea alone, Allseas track record in the safe and reliable installation of natural gas pipelines is unmatched.

Our contribution to the N05-A project exemplifies our commitment to leveraging offshore expertise for innovative and sustainable energy solutions.

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.

About ONE-Dyas

ONE-Dyas B.V. is the largest privately owned exploration and production operating company in the Netherlands.

We are strategically positioned in some of the world’s most exciting regions: the North Sea (Netherlands, United Kingdom, and Germany), with 200 million boe of reserves and resources and a material prospect portfolio.

ONE-Dyas has extensive experience managing a successful and balanced upstream portfolio of operated and non-operated exploration and production assets in the North Sea. Our approach is that of carefully planned strategy underpinned by technical expertise, geographical diversification, and cost-effective development and operations.

The ONE-Dyas production profile shows an average production base of some 20,000 boe per day during 2023, with growth in the years thereafter.