Allseas Scores Gyda Platform Removal Job

September 20, 2019

Impression of how the Gyda jacket ready for transport in a near-vertical positon (Image: Allseas)
Impression of how the Gyda jacket ready for transport in a near-vertical positon (Image: Allseas)

Allseas announced on Friday it has been awarded an EPRD contract from Repsol Norge to remove, transfer, load-in to shore and dispose of the Gyda platform in the Norwegian North Sea.

The contract covers both the 18,000 t topsides and 11,200 t jacket, and includes an option for reinstallation on another field, which would be an unprecedented step for a fixed installation off Norway. Also included is an option for the removal, transfer, load-in and disposal of the jacket’s 32 conductors, weighing a total 3,100 t.

Allseas said it will perform the work using its heavy lift installation and decommissioning vessel Pioneering Spirit.

Gyda, in the southern part of the Norwegian sector in the North Sea, between the Ula and Ekofisk fields, has been developed with a combined drilling, accommodation and processing facility with a steel jacket standing in 66 meters water depth. The platform started producing in 1990, a decommissioning plan was submitted in 2016 and Gyda is now producing in parallel with plugging of the Gyda wells. The platform is in good technical condition, prompting operator Repsol to consider re-use, Allseas said.

As the jacket was vertically fabricated and installed in the nineties, the structure cannot sustain loading in the horizontal position during transport. Allseas and Repsol spent more than a year studying ways to move the platform from its current location and bring it to shore for disposal. The solution of transporting the jacket in a near-vertical positon (60 degrees) with Pioneering Spirit’s unique jacket lift system unlocked the possibility for Repsol to award the full scope, both the topsides and jacket, to Allseas.

Removal is planned for between late 2020 and 2023. Allseas said it has selected Kvaerner to dismantle and recycle the platform at its Stord disposal facility on the west coast of Norway.



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