Although developments in technology are extending the design/operational life of North Sea Oil and Gas Installations, ultimately all of these will have to be decommissioned.
There are various factors to be considered for this process including platform size, water depth, abandonment of wells and pipelines to name but a few. There is no common approach that can be applied to all. The decommissioning process itself can take several years from sanction which will necessitate the phased decommissioning of certain safety systems such as fire and gas and utilities. Experience in this area is limited due to the fact that less than 5% of North Sea Installations have reached this Stage.