Tyra II has its final shape

ALL IMAGES COURTESY OF TOTALENERGIES.

With 35,000t of steel located 54m above the seabed, Tyra II is Denmark’s new high-tech hub for natural gas production in the Danish North Sea. The design, construction, and installation of the Tyra II platforms, when completed in the winter season 2023/24, have taken a total of more than ten years. Tyra II will be one of the world’s most advanced gas fields, developed for the energy production of the future, which at the same time reduces CO2 emissions from natural gas production by as much as 30%.

Now, all dots of Tyra II are connected and the lifting of the final four Tyra II pieces – the process module, two bridges and a flare tower – came to a successful end. After this operation, the last welding work takes place to ensure that the new modules can resist many

years of rough North Sea weather. Finally, the hook up and commissioning team will focus on completing and powering up the installed platforms and reconnecting them to the existing North Sea infrastructure. That will be the last phase before delivering the first gas from Tyra II in the winter season 2023/24.

More than 260 people executed the lifting of the process module, two bridges, and one flare onboard Sleipnir in October 2022. On 4 October 2022, the biggest and final Tyra II topside was safely installed at the Tyra field. The lift of the 17,000t heavy process module broke a world record as the heaviest crane lift ever undertaken at sea. Thebridge that connects the accommodation and process platforms was the final Tyra II module that was lifted into position. It is 85.4m long and weighs 370t. “It’s exciting to be able to see the complete shape of Tyra II as all eight platforms, six bridges, two jackets, and one flare are now in their final position. I’m very proud of our installation team and our skilled partner Heerema Marine Contractors who once again executed textbook lifting operations. Nevertheless, there is still a lot of work o shore to complete to get Tyra II ready for first gas in the winter season 2023/24”, says LarsBo Christiansen, Deputy Project Director for TotalEnergies EP Denmark.

TotalEnergies is the operator of the Tyra field on behalf of Danish Underground Consortium (DUC) – a partnership between TotalEnergies (43.2%), Noreco (36.8%) and Nordsøfonden (20%). Tyra is Denmark’s largest natural gas field and has been a center for processing and exporting more than 90% of the natural gas produced in the

Danish North Sea before its redevelopment. The redevelopment of the Tyra field is necessary due to the field’s natural subsidence of the chalk reservoir after many years of production. As a result, the platforms have sunk nearly five meters over the past 35 years. This has reduced the distance between the sea and the platforms’ decks. The redevelopment of the Tyra field includes three main elements: decommissioning and recycling of the old Tyra platforms, extending the current platform legs on six of the platforms with 13m, which now also has new topsides, a completely new process module, and a new accommodation platform. Once the modernised Tyra II is back on stream, it is expected to deliver 2.8m3 billion gas per year which amounts to 80% of the forecasted Danish gas production. Tyra II will secure continued production of natural gas with 30% less CO2 emissions and contributing to energy security of Denmark and Europe.

Sleipnir is the world’s largest crane vessel owned by TotalEnergies’ EPC contractor Heerema Marine Contractors. Sleipnir’s two huge cranes can lift a weight of up to 20,000t. The vessel is 220m long and 102m wide – a size equivalent to approximately three football fields. Sleipnir has been part of the Tyra removal campaign and also helped to install the new jackets in September 2020 as well as the remaining new Tyra II modules including the accommodation module, six well head and riser modules, and four bridges in September 2021, and in April 2022.