Maersk Oil’s Culzean jackets have set sail for their final destination in the UK North Sea, following the completion of construction by Heerema Fabrication Group (HFG).
Image from Heerema.
According to HFG, the jacket for the central processing facilities platform (CPF) set sail on 28 June, and the jacket for the utility and living quarter platform (ULQ) set sail today (7 July).
Their final destination is the high-pressure high-temperature (HPHT) Culzean development field in the British sector of the North Sea.
Fabrication started in January 2016. HFG Engineering was responsible for the engineering of the grillage and sea fastening for the jackets and piles. HFG Polska built the jacket appurtenances and pre-fabricated the grillages and sea fastening. The fabrication of two pile sleeve clusters of the CPF jacket and the pre-assembly of half of the ULQ jacket leg parts were executed by Heerema Zwijndrecht, while the four pile sleeve clusters of the ULQ jacket and two pile sleeve clusters of the CPF jacket were constructed by Heerema Hartlepool. At the Vlissingen yard, the two jackets were fabricated and assembled. Both jackets are approximately 115m high and have a foot print of 38 x 38m. The CPF jacket has a top of 24 x 30m and a weight of 8388-tonne. The top of the ULQ jacket is 24 x 24m and this jacket weighs 7181-tonne.
The Culzean field - discovered in 2008 - is situated in the British sector of the Central North Sea approximately 250km to the east of Aberdeen in license block 22/25a. The water depth is approximately 88m and the reservoir is located around 4300m below sea level.
The overall Culzean development consists of a wellhead platform, a central processing facility platform and a separate utilities and living quarter platform. The platforms will be interconnected by two bridges, each approximately 100m in length. First gas is expected in 2019. The Culzean project has the potential to meet around 5% of the British gas consumption in 2020/21.
Maersk Oil awarded HFG the Culzean project in September 2015 for the engineering, procurement and construction of the two jackets.
In October 2014, HFG was awarded the procurement and construction contract for the Culzean wellhead platform jacket, wellhead access deck and access ways. As part of the contract, six pile sleeve clusters will be fabricated at Heerema’s Hartlepool facility in the UK, in addition to the Wellhead Access Deck.