We are an expert in the decommissioning of oil and gas assets. Complemented by our integrity management and lifetime extension capabilities and expertise, we provide a suite of decommissioning services to support our clients through all stages of a decommissioning project, from initial feasibility studies and cost estimations, through detailed engineering and offshore activities, to project completion and close-out.
- Identification of optimum decommissioning strategy through technical assessments and cost modelling;
- Decommissioning cost estimation and independent review of ABEX estimates
- Assessment of decommissioning methods for structures, pipelines and risers through onshore studies. This includes performance of both screening level and full comparative assessments;
- Development and writing of decommissioning programmes and procedures;
- Determination of cleaning approaches and management / technical assurance of offshore activities;
- Review of structural and pipeline inspection requirements at various stages in the decommissioning process, accounting for changes in the risk profile;
- Project management and support of decommissioning programme execution and close-out, including liaison with the regulatory bodies;
- Definition, management and assessment of overtrawling surveys following completion of decommissioning works;
- Management of disused pipelines following cessation of production and of pipelines decommissioned in-situ.
We have practical experience in decommissioning project engineering, including well abandonment, pipeline decommissioning, topsides removal and jacket removal (or derogation). From this experience, we have developed an in-depth understanding of:
- The issues involved;
- Equipment available for decommissioning at present and emerging technologies;
- The associated vessel rates and typical timeframes for the decommissioning of certain components;
- Scheduling and sequencing efficiencies to be gained in the decommissioning of hubs;
- The recycling / disposal routes and associated costs.