Case study

Maersk Culzean Subsea System

Maersk Culzean Subsea System

The Culzean project development is an ultra high pressure high temperature (UHP/HT) gas condensate development located some 145 miles East of Aberdeen in the UK sector of the Central North Sea.

The Culzean discovery is located on Block 22/25a (License P111) in a water depth of some 90 meters. Maersk as operator holds a 49.99% interest in Culzean, with partners JX Nippon UK (18.01%) and BP (32.00%).

Gas will be exported from the Culzean CPF platform through a subsea pipeline connected to the CATS pipeline system. The gas export pipeline will be a 22” carbon-steel line, concrete-coated, un-buried, and installed by S-lay.  The Gas Export pipeline will include 2 midline U-Shaped expansion spools.

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Project scope

Sealand Projects have supported Maersk through the lifecycle of the Culzean Project,  by managing and coordinating the delivery of the subsea package from the initial concept screening, through FEED, input to securing FID, tendering and vendor selection process, engineering, offshore construction, commissioning and handover ready for start up.

Following successful installation of the subsea infrastructure, Sealand Projects have been engage to manage and co-ordinate the FSU mooring system installation, tow and hook-up using the Maersk construction fleet.

Work included:

  • Concept Screening
  • Cost, Schedule & Risk Modelling
  • Mooring System Installation
  • FEED Management
  • Preparation of Subsea Package for FID
  • P.L.A.N.C.
  • Contract Strategy & PEP
  • Stakeholder Management
  • Progress Monitor of Suppliers and Contractors
  • Tendering and selection of vendors and contractors
  • Fabrication, Construction, Transportation & Installation
  • FSU Wet Tow
  • Commissioning & Testing
  • As-built & Lessons Learnt
  • Assurance & Risk Management