DECOM: Innovator platform in Gomez field successfully decommissioned

6th Annual Decommissioning & Abandonment Summit

10/03/2014 – 12/03/2014

Discover cutting-edge approaches for reducing offshore liability to deliver more timely, cost-effective and safer decommissioning projects

By Rod Sweet on Mar 5, 2014

Platform was the first permanent SEPLA mooring and the third permanent polyester mooring system in the Gulf of Mexico.

Acteon’s subsidiary InterMoor has successfully decommissioned the Innovator platform in Gomez field, Mississippi Canyon Block 711, Gulf of Mexico.

The scope of work, conducted in water depths of 910 m, involved disconnecting 10 risers/umbilicals; disconnecting 12 mooring lines and then towing the Innovator to Ingleside, Texas.

InterMoor developed special procedures for disconnection and towing, procured rigging and tow equipment for all vessels including the Anchor Handling Vessel (AHV), FPU and tug vessels, and provided personnel.

InterMoor’s involvement with the Innovator platform dates prior to 2006 when it was a mobile offshore drilling unit (MODU) known as the Rowan Midland.

At that time, the MODU was being converted by ATP to a production platform, and InterMoor provided the mooring design, project management, procurement, installation and hook-up of the mooring system.

The 12-leg mooring system consisted of suction embedded plate anchors (SEPLA), stud link chain, subsea connectors and polyester mooring ropes. At the time it was only the third permanent polyester mooring system in the Gulf of Mexico, and the first permanent SEPLA mooring.

In 2011 InterMoor provided mooring line inspection, change-out of all rig wires, and upgrading five of the mooring legs.

InterMoor says the success of the decommissioning programme resulted from its detailed understanding of the Innovator platform’s mooring system.

Tom Fulton, InterMoor president, said, “At a time when many operators are looking at life-of-field solutions, we are proud to have played a role at crucial times throughout the development and decommissioning of this offshore asset.”
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