Client: Dana Petroleum Ltd
Location: UK Northern North Sea


Xodus were asked by Dana to provide project management support and supporting studies to develop decommissioning plans for the Hudson subsea field that ties into the Tern platform. Project management included delivery of the Well Engineering performed by Petrofac.  The primary objectives were to:

›        Facilitate a series of project framing workshops to better understand the project objectives, critical success factors and interfaces.

›        Perform engineering studies to define a base case for the execution of the decommissioning programme, including project cost estimates.

›        Develop detailed project roadmap including all planning and project enabling scopes.

›        Support progress of the project through to the Define phase.




The key deliverables covered the following areas of scope:

›        Propose decommissioning and abandonment strategies for the relevant topsides equipment, subsea infrastructure and wells.

›        Define project costs and details of how this is phased over the coming years.

›        Roadmap showing activities from now until post decommissioning.

›        Identify potential opportunities for cost and schedule optimisation.

›        Identify and evaluate the risks and opportunities to the project.

›        Scope out potential project delivery models, contracting strategy and supply chain requirements.

›        Define Health, Safety and Environment (HSE) philosophy.



Value Added:


›        Small team of specialists were able to look at all aspects of the decommissioning, producing a coherent strategy.

›        Assisted Dana to visualise decommissioning roadmap to understand level of flexibility available and constraints through dependencies as identified in the strategy work.

›        Industry knowledge of decommissioning project execution planning has allowed Dana to start early conversations with their joint venture partners about their plans.

›        Fostered collaboration between the joint venture partners and between the delivery of the wells and facilities engineering scopes.