ABERDEEN, UK – Xodus Group has performed a concept study and front-end engineering design project for an unnamed decommissioning project in the North Sea.
This concluded that the operator could save up to £59 million ($77 million) by adopting a Not Normally Attended (NNA) status for one of the field’s platforms ahead ofdecommissioning.
Recently well P&A operations finished from the other two platforms. The third platform had operated as a manned facility but ceased production several years ago.
The operator wanted to convert the platform to a minimum facilities installation in order to reduce abandonment support costs over a six-year period until final decommissioning took place.
Following Xodus’ advice, the platform has transitioned to NNA status. The company developed a comprehensive operations and maintenance approach which was endorsed by the operator following consultation with stakeholders.
Among the proposals were the introduction of solar arrays to provide the power supply to critical equipment such as well monitoring, navigational aids, and intruder monitoring.
Xodus also specified communications between the platform packages and onshore monitoring systems to allow an integrated digital dashboard to be developed, providing a snapshot of the status of the asset at any time.