ENI OCTP

OIL & GAS FIELD

Project overview

CLIENT EMAS CHIYODA SUBSEA
VESSEL LEWEK CONSTELLATION

The ENI OCTP (Offshore Cape Three Points) block is located Offshore Ghana in 130-1380 meters of water depth and about 60km from the coast. The ENI OCTP oil and gas field shall be produced from five main regions (NE, SE, SW, NW and Gye Nyame) with the FPSO moored above the Sankofa Canyon at a water depth of 980m.

PASSER-LARS were contracted to provide Equipment, Project Management, and Engineering Services to EMAS Chiyoda Subsea for the installation of flexible riser and flowlines in the development of the ENI OCTP Development Project.

Equipment and services provided

4500Te 26m OD x 10m H Basket Carousel
Loading Tower c/w 10Te Vertical 2 Track Tensioner
2 x 2m project specific loading tower extension sections
Underbender Chute for lay operations with vessel MLS

PASSER-LARS scope of work

Provision of 26m Diameter x 10m Height 4500Te Basket Carousel and new build Loading Tower combined with new build 10Te Tensioner
Project management and engineering of equipment design / fabrication
Design engineering for deck integration and sea fastening
Co-ordination of equipment transport to Lewek Constellation vessel
Responsibility for equipment loadout mobilisation / demobilsation and provision / management of associated subcontractors
Equipment commissioning workscope and provision / management of associated subcontractors
Equipment Operators and Project Engineering support

Detailed engineering

Swan Hunter utilised several project specific solutions to enable an efficient equipment mobilisation period, and increased operability infield including:
Preinstalled (pre-mob) carousel interface grillage beams between vessel deck and rigid reel skid rails
Dual position loading tower interface grillages installed during mobilisation. Bolted connections allow for swift tower repositioning operations between the multiple spooling and laying campaigns
Product specific underbender chute utilised to provide lay interface between Swan Hunter Loading Tower and the Lewek Constellation MLS (Multi Lay System) top aligner wheel
Engineering design verification for carousel basket volume increase due to large product OD’s of up to 500mm

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