Page 35: of Offshore Engineer Magazine (Sep/Oct 2023)

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FEATURE BROWNFIELD DEVELOPMENT yra is Denmark's largest gas ?eld, with its in- contractors for the project, Allseas and Heerema Marine frastructure also serving as a processing hub Contractors, the equivalent of multiple Eiffel towers in for other nearby gas ?elds, processing and ex- weight of Tyra infrastructure had to be removed and taken porting more than 90% of the natural gas pro- to shore for recycling, to make way for new infrastructure, duced in the Danish North Sea. also weighing tens of thousands of tons.

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A couple of years ago, the ?eld, which had been in pro- A lot has happened since the decision to proceed with duction since 1984 was on the verge of being decommis- the redevelopment of the Tyra ?eld, located, in Blocks sioned as its facilities had been nearing the end of life, and 5504/11 and 12, 225km west of Esbjerg, was made. Some its jacket-supported platforms were slowly sinking ever companies no longer exist today, some have sold their in- closer to the sea surface. terests in the project, and some have been renamed, and

In 2017, then-operator Maersk Oil said the facilities the production start-up deadline had to be postponed due were no longer safe for work, having sunk ?ve meters deep to the COVID-19 outbreak.

over the years, and warned it would shut down the ?eld Maersk Oil was bought from Maersk by France’s Total for good on October 1, 2018, should no viable economic in a deal estimated at $7.45 billion, struck in 2017 and solution for the development of the ?eld be found, putting completed in March 2018. in jeopardy hundreds of jobs, as well as other nearby ?elds. In September of the same year, the French oil major bought

A couple of months later, a decision was reached to rede- out Chevron’s Danish business, increasing its operatorship velop the ?eld, by removing old infrastructure and install- in the DUC from 31.2% to 43.2%. In October 2018, Shell ing new jackets and platforms, not a simple undertaking, agreed to sell its Danish upstream business to Norwegian in what would become Denmark's largest infrastructure Energy Company (Noreco) in a deal valuing Shell’s assets at project, as well as Denmark's largest recycling project. around $1.9 billion. In May 2021, Total changed its name

Namely, the redevelopment called for the ?eld shut- to TotalEnergies to mark „strategic transformation into a down in 2019, removal and decommissioning of the prior broad energy company,“ and in March 2023, Noreco an-

Tyra platforms, some reuse, recycling, and 10-13 meters nounced its name change and is now known as BlueNord.

extension of the current jackets at six platforms that would Sembcorp Marine which in December 2019 secured have new topsides a totally new process platform, and a the subcontract to construct six topside modules and four new accommodation platform. bridges for the Tyra Redevelopment, is now called Seat-

According to the main decommissioning and removal rium, after completing its $3.4 acquisition of Keppel's off- 36 OFFSHORE ENGINEER OEDIGITAL.COM