An Energean seabed survey at three UK Southern North Sea fields will document conditions after offshore installations and uncovered subsea equipment have been removed. Swedish contractor Njord Survey has been engaged for the work at Wenlock, Garrow and Kilmar, World Oil reported on 9 November. The records will be assessed against pre-decommissioning survey data and used in Energean’s regulatory close-out submission.

The campaign covers seabed around former installation sites and along pipeline corridors. Njord Survey will supply company-operated vessels and survey equipment, with its full-time staff carrying out the work. Planned methods combine multibeam echosounder and side-scan sonar mapping with environmental sampling and analysis, video transects and still images.

CEO Martin Wikmar said the survey must provide evidence acceptable to the regulator that the seabed has been cleared. Andrew Shepherd, Energean UK’s decommissioning head, said the company also wants to establish that its work caused no enduring environmental harm.

Garrow and Kilmar, together with their pipelines, are within the Southern North Sea Special Area of Conservation, which World Oil identifies as harbour porpoise habitat. As separate background, Energean’s Kilmar decommissioning programme, hosted on the UK Government website, describes a debris survey covering a 500-metre radius around the platform and a 50-metre strip on either side of pipeline routes affected by decommissioning. It says OPRED will receive seabed-clearance verification as part of the final close-out documentation.