Two new jackets have been installed at Total’s Tyra gas field in the Danish sector of the North Sea as part of the major ongoing $3 billion redevelopment.

Field partner Noreco said the the successful installation, which was completed on Monday, "moved the project into a new phase" focused on completing the new topsides modules.

The two jackets, which were fabricated in Spain by Dragados Offshore and installed by Heerema Marine Contractor's Sleipnir heavy-lift vessel, will form the foundation for the new Tyra process and accommodation platforms.

Total acknowledged earlier this year that work on the redevelopment of Tyra was facing "challenges" from the Covid-19 pandemic but the project remains on schedule for start-up in 2022.

The accommodation module is being built in Italy at the Rosetti Marino facility, the 16,500-tonne process module in Indonesia at McDermott International's Batam facility, while wellhead and riser modules are being built in Sembcorp Marine Offshore Platforms (Sembmarine) in Singapore.

The Tyra Redevelopment is expected to deliver about 60,000 barrels of oil equivalent per day at peak and enable production of more than 200 million barrels of oil equivalent.

'Important achievement

“The delivery and installation of these jackets is an important achievement for the project and a true testament to our ability to consistently deliver in-line with expectations, in both a safe and predictable manner,” said Noreco chief executive David Cook.

The Tyra platforms have been at the core of Denmark’s energy infrastructure for 30 years, processing 90% of the nation’s gas production.

However, depletion of the reservoirs underground has caused the two existing processing platforms and six wellhead platforms to start sinking into the seabed to the point that they are becoming unsafe and need to be replaced.

Operated by Total for the Danish Underground Consortium (DUC) — a joint venture between Total, Noreco of Norway and the Danish state-owned North Sea Fund — the field was earmarked for a revamp, at a cost of Dkr21 billion ($3 billion), using the newest technology available.

In August, Allseas’ gigantic heavy-lift vessel Pioneering Spirit completed work to remove the processing and accommodation topsides and flare jackets of Total’s Tyra platforms in the Danish North Sea.

Field Development

New jackets installed at Tyra in North Sea off Denmark