Western Australia
Landmark: First Project Under the Woodside Frame Agreement
Project Overview
- Contract Award: 2003
- Sales: Perth, Australia
- Fabrication: Singapore & Perth, Australia & Kongsberg, Norway
- Service Base: Singapore
- Host Type: FPSO
- Contract Type: EPC
Project Characteristics
- No. Trees: 12
- Water Depth: 550 m (1,804 ft)
- Tree Type: OXT
- Tree Pressure: 5,000 psi
- Tree Bore Size: 5"x2"
- Hydrocarbon: Oil
Project Ownership
Scope of Work
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Thirteen (13) OXT’s ( 5 Production, 2 Gas Injection and 6 Water Injection)
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One (1) Production Manifold and (2) WT Manifolds
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Topside Controls
- Tools
- System integration, testing, installation assistance, service and maintenance
Comments
Woodside Energy Limited are developing the Enfield oilfield, located in Permit WA 271P, off Australia’s North West Cape, using subsea wells, manifolds and flowline systems tied-back to a Floating Production, Storage and Offloading System (FPSO).
The ship shaped, double hulled FPSO will be moored to a disconnectable turret approximately 3 kilometres West of the Enfield Reservoir in approximately 600 metres. The production and processing facilities will be sized for between 140,000 bpd total produced liquids. These facilities are sized to accommodate future tie-in of other prospects in the vicinity.
The Enfield Reservoir will be developed using a subsea production system initially comprising 5 production wells at a central cluster, 3 water injection wells to the north and 3 to the south of the production cluster.
The area is subject to severe cyclone activity and so the FPSO utilises a disconnectable mooring system. Produced gas will be utilised as fuel for the FPSO and the excess will be gas re-injected into 2 gas injection wells located to the south of the reservoir. Crude oil will be exported via a stern mounted floating hose system into non-dedicated, tandem moored offtake tankers.
The subsea facilities comprise 5 satellite production wells producing through 1 manifold. The Subsea Tree is of a novel OXT design of concentric completion which allows the tubing string to be run at the same time as the Subsea Tree in open water, thus saving trip times.