Decommissioning of Shelley Field

Costain was contracted by the client to decommission the Shelley FPSO Sevan Voyageur and subsea facilities at the end of the economic field life.

  • Service 1

Premier Oil

  • Service 1

Advisory and concept development

Costain was contracted by Premier Oil to perform:


The definition phase of decommissioning including the production of the Decommissioning Programme for approval by DECC.

Project management of the decommissioning operations, including:

  • Development and management of a detailed integrated schedule
  • Management of the subsea contractor
  • Interface with the duty holder and FPSO owner
  • Project control and reporting
  • Risk management
  • Interface management
  • HSEQ management
  • Regulatory compliance management

Costain achieved approval of the decommissioning programme, defined the sanction budget and delivered the project in accordance with sanction commitments.

Contact and social

Oil & Gas

Gerard Shore, Sector director
0161 910 3444