The long-term integrity of suspended or abandoned well barriers is a critical component of the late life and decommissioning process. The environmental and financial ramifications of a barrier fail cannot be underestimated and - as the UK seeks to become a centre of decommissioning excellence - it is important that the North Sea oil and gas industry demonstrates a proactive approach to environmental stewardship.
Sentinel Subsea Ltd has developed a unique method of well integrity monitoring.
Simply and cost-effectively deployed, the system passively monitors the subsea environment around a suspended or abandoned well for over 10 years, without the requirement for intervention. In the instance of barrier failure, a sequence of alerts notifies the responsible parties, allowing them to take immediate, effective action.
In addition to minimising the costs associated with inspection of suspended/abandoned wells, the system’s early alert process can lower the potential cost of remediation.
The system’s long-term validation properties also promote the adoption of innovative abandonment techniques; an ethos central to the drive to reduce UKCS decommissioning costs.