Project Description

Build a fully scalable decommissioning capability at a reduced cost

Find out how

North Sea, UK

Maersk Supply Service, a parent company of Maersk Decom, project managed and executed the full scope of decommissioning for the Janice and James fields.

In 2016, we were contracted by Maersk Oil UK, later acquired by Total, to provide the full marine asset coverage for the Janice and James decommissioning project in the North Sea. This was led by our project management business area, Integrated Solutions. Combining 50 years of maritime experience and in-house engineering capabilities, Integrated Solutions is able to simplify the work scope, making operations more dynamic. The ability of Integrated Solutions to supply and manage offshore interfaces throughout the project allowed for greater flexibility, optimised schedule and more time for our customer to focus on its core business.

Project Details

CLIENT

Total E&P UK

WATER DEPTH

80 m

NO OF VESSELS USED

9

DURATION

2016 to 2018

OPERATIONS

WROV, cutting, lifting, disposal

Scope

Project management and marine services

The responsibilities undertaken in the project include project management, engineering, subcontractor management, offshore planning, interface management and associated logistics, execution of the offshore work scopes required in the removal of the subsea facilities, and thereafter the disposal through management of waste disposal contractors.

Innovation

New spooling method to save costs and time

Using the large winch drums of newbuild AHTS Maersk Master, we developed an alternative method to recover flexible and umbilical products in a complete section. This eliminated the need to mobilise expensive reel drive systems, minimised trips to port to offload recovered items, and reduced the likelihood of spills.

Efficiency

Optimised vessel utilisation

Maersk Supply Service has a versatile and global fleet at its fingertips. Utilising this fleet, our pragmatic approach maximised the operating potential of every vessel in field, eliminating the need for additional specialist vessels.

Project Gallery

Recovering flexible and umbilical products
Offloading 82 tonne midwater arch from Maersk Achiever

Work Scope

0
TONNES OF PRODUCT FROM THE SEABED RECOVERED
0
KM OF FLOWLINES RECOVERED WITH SPOOLING METHOD
0
TONNES OF STRUCTURES, MANIFOLDS AND CONCRETE MATS RECOVERED
  • Towed for recycling
  • Performed by four anchor handling tug supply vessels
  • 11 rig moves during plug and abandonment phase
  • Performed by five anchor handling tug supply vessels
  • 772 tonnes of product from the seabed
  • 25 km of umbilicals, flowlines and flexible jumpers of 4-13” ID
  • 100+ concrete mats
  • 1,400 tonnes of structures, manifolds and concrete mats
  • Performed by Maersk Master, Maersk Achiever and Maersk Inventor
  • Well severance
  • Tree recovery
  • Performed by Maersk Achiever
  • Efficient removal of waste and decommissioned materials from offshore
  • Offshore storage
  • Performed by three platform supply vessels
Download Fact Sheet

More case stories