A major milestone has been reached regarding the decommissioning of the Northern Endeavour FPSO wherein an extensive well suspension and flushing campaign has been successfully completed.
The campaign started in September 2024, led by Phase 1 contractor Petrofac Facilities Management Limited (Petrofac). Sapura Constructor, the light well intervention vessel, has completed the works in the Laminaria-Corallina oil fields.
The critical work included temporarily suspending seven of the nine oil wells in the Laminaria-Carollina oil fields (two of the wells were previously suspended). The process involved closing off the valves that control pressure and flow on the sea floor, and installing two sets of specialised barriers at two different sections of the well to ensure fluids cannot escape.
The other part of the campaign involved flushing of nearly 30km of pipeline, including subsea umbilicals, risers and flowlines. The process ensures the pipeline are clear of hydrocarbons and hazardous materials before disconnecting the FPSO which is penned for the second half of 2025.
The completion of this well suspension and flushing campaign is a major step towards allowing the FPSO to be safely disconnected from the subsea infrastructure without leaking fluids into the ocean. More work will take place in later phases of the project to permanently plug and abandon the wells.
