Centrica has awarded two separate contracts to OIS and Atkins as part of its UK and Dutch North Sea decommissioning strategy.
Atkins, the engineering and project management consultancy, has won a five-year contract to provide engineering services to Centrica Energy’s North Sea decommissioning programme.
According to Atkins, the agreement covers any decommissioning work Centrica decides to undertake in the UK and the Netherlands during the five years of the contract. Under the multidisciplinary pre- FEED (Front End Engineering Design) contract, Centrica will use Atkins for any engineering and design services the decommissioning work entails, exploiting Atkins’ expertise in subsea structures, pressure systems and environmental feasibility.
Discussing the contract award, Centrica was clear that while it still wants to maximise the potential of its North Sea assets, it is necessary to take a realistic position on its ageing installations. Myrtle Dawes, projects director at Centrica said, ‘in a mature region like the UK Continental Shelf the industry must also think about how we decommission our offshore platforms, subsea infrastructure and pipelines.’
In line with these comments, Centrica has also contracted Offshore Installation Services (OIS), part of the Acteon subsea services group, to decommission wells, starting with six in the central North Sea.
OIS will use a diverless vessel, the AHTS Island Valiant. The vessel will use a suspended well abandonment tool (SWAT) system, provided by another Acteon company, Claxton Engineering Services, to set cement plugs in the bore and casings before it cuts the wells with an abrasive severance system and removes them from the seabed.