Preparing for hydrocarbon release risks during offshore decommissioning
Decommissioning offshore assets can introduce uncertainty, from equipment removal and changing site conditions to the potential for an unexpected hydrocarbon release. To support a planned decommissioning programme, an OSRL member sought preparedness support and equipment hire to help ensure the right arrangements were in place should a release occur.
Planning for a complex operating environment
Having supported the member for several years, we were able to draw on previous experience of both the organisation and the local operating environment. The project presented logistical and visa challenges, and the work took place during the Christmas and New Year period. The member needed confidence that equipment, personnel, and practical response options would be available if required.
Developing response readiness
The team developed a Tactical Response Plan (TRP) to provide clear operational guidance in the event of a release. The plan considered boom deployment options, tide and current conditions, environmentally sensitive areas, safety considerations, ongoing dismantling activities, and the resources required to support a response.
To support implementation, we delivered equipment familiarisation, vessel crew training, deployment exercises, and follow-up sessions for incoming crews and safety officers. This helped ensure response arrangements remained effective throughout the project as personnel changed.
Addressing operational challenges
The project involved several practical challenges, including customs clearance, crew rotations, and training multiple vessel crews. Modifications were also required to vessel protection measures to allow boom and skimmer deployment. By combining preparedness planning, equipment availability, and on-site support, these challenges were addressed before they could affect response readiness.
Key lessons for decommissioning projects
- Simple, operational response plans support faster decision-making.
- Equipment and resources should be considered early in the planning process.
- Practical training helps build familiarity before an incident occurs.
- Crew changes should be supported with ongoing training and knowledge transfer.
- Exercises and deployment drills help validate plans and build confidence.
- Local operating constraints should be considered from the outset.
Supporting preparedness during decommissioning
With equipment in-country, trained crews, and a clear Tactical Response Plan in place, the member felt prepared to respond locally should a hydrocarbon release occur. The project demonstrated the value of combining preparedness planning, equipment readiness, and practical training to support safe and effective decommissioning activities.
Download the full case study to learn more about the Tactical Response Plan, vessel deployment exercises, and operational challenges encountered during the project.
