Woodside Energy Limited is submitting a 5-year environment plan revision for the Ngujima-Yin (NY) floating production, storage and offloading (FPSO) Facility Operations activity. The NY activity commenced operations in 2008 and is located in Commonwealth waters of the Exmouth Sub-Basin of Western Australia (WA) approximately 43 km north of North-West Cape, WA. The water depth at the FPSO mooring location is approximately 340 m with wells located in water depths up to 849 m.
The NY FPSO and subsea infrastructure is located in Production Licence Areas WA-28-L and WA-59-L. The facility currently produces crude oil from the Vincent reservoir (VIN); as well as the Norton over Laverda (NOL), Laverda Canyon Reservoir (LAV) and Cimatti (CIM) fields. The three NOL, LAV and CIM fields are collectively referred to as the Greater Enfield (GE) Development. The GE rigid production flowline operates under Pipeline Licence WA-28-PL.
The NY facility is comprised of the FPSO vessel, processing and separation facilities (for oil, water and gas), gas compression facilities and associated subsea infrastructure. Under normal operations, surplus gas and produced water is disposed by reinjection back into the reservoir. Gas reinjection also provides artificial lift for the CIM field. For the GE wells, treated sea water produced topside is reinjected via dedicated water injection wells for pressure support. After processing, the stabilised crude oil is offloaded to trading tankers for export.
The activities proposed to occur within Permit Area WA-28-L, WA-59-L and WA-28-PL include:
- Routine production and associated activities from existing subsea wells
- Crude oil offloading activities
- Routine and non-routine inspection, monitoring, maintenance and repair (IMMR) of the FPSO and associated subsea infrastructure
- Disconnection and sailaway of the FPSO with the submerged turret production (STP) mooring and subsea infrastructure remaining in place
- Non-routine, unplanned activities and incidents associated with the above.
The NY FPSO Facility Operations EP is intended to remain in force for up to five years following acceptance.
