seven borealis

Technip and Subsea 7 Win $1.2 Billion in Deepwater Projects Offshore Ghana

Rob Almeida
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October 31, 2013

Seven Borealis, image: Aerolin

Technip and Subsea 7 will be working together offshore Ghana on a USD $1.23 billion SURF project for Tullow Ghana announced today.

The Tweneboa-Enyenra-Ntomme Development (TEN) Project, located in the deepwater Tano Contract Area, 60 kilometers off the coast of Ghana at a water depth reaching up to 2,000 meters, will consist of 24 development wells connected through subsea infrastructure to a Floating, Production, Storage and Offloading vessel (FPSO), moored in approximately 1,500 meters of water.

Technip and Subsea 7 will be responsible for the engineering, fabrication, and installation of the subsea architecture of this project, including:

  • 9 flexible risers (Technip)
  • 3 flexible flowlines (Technip)
  • 12 flexible spools totalling 48 kms (Technip)
  • 33 kilometers of water injection and gas injection rigid flowlines (Technip)
  • 63 kilometers of static and dynamic umbilicals (Technip)
  • 10 well rigid jumpers and 6 prefabricated rigid jumpers (Technip)
  • 36 kilometres of pipe-in-pipe flowlines (Subsea 7)
  • Flowline termination structures (Subsea 7)
  • Foundation piles (Subsea 7)
  • Transport and installation of manifolds, riser bases and flying leads (Subsea 7)

Technip’s share of the project is about USD $730 milllion and Subsea 7’s is around $500 million.

Subsea 7 notes that the offshore installation will commence in mid- 2015, using the 2012-built heavy lift / pipelay vessel, Seven Borealis.

The Seven Borealis, pictured above, is an ULSTEIN SOC5000 design vessel measuring 182.2 x 46.2 meters, with a moulded draft of 16.1 meters.  The vessel is equipped with the world’s largest revolving mast crane, capable of lifting 5,000 mT (at 40 m) over the stern. The crane has a maximum operating water depth of 6000 m with single fall.

The project completion date is projected for the second half of 2016.

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