Australia
Landmark: Asia’s First Spar Used on a Subsea Development
Project Overview
- Contract Award: 1995 (Ph I) 1998 (Ph II)
- Sales: Singapore
- Fabrication: Singapore
- Service Base: Perth, Australia
- Host Type: Spar
- Contract Type: EPC
Project Characteristics
- No. Trees: 2 (Ph I) 1 (Ph II)
- Water Depth: 100 m (330 ft)
- Tree Type: Horizontal
- Tree Pressure: 5,000 psi
- Tree Bore Size: 5"x2"
- Hydrocarbon: Gas
Project Ownership
Scope of Work
- Three (3) horizontal 5"x2" 5,000 psi subsea trees
- One (1) UWD-15 wellhead system
- Four (4) 7" tubing hangers
- Radial penetrations for surface-controlled subsurface safety valves (SCSSV) and downhole pressure temperature monitor (DHPTM)
- System integration testing, installation assistance, service and maintenance
Comments
The development consists of an initial two (2) wells followed by an additional well which was completed at a later date. The system is designed to produce 100 mmcf/d of natural gas, which is exported by a 14" pipeline to a terminal on Varanus Island, 63 km (39 miles) away from the subsea development.
The requirement for a very long umbilical was eliminated by the innovative solution of controlling the subsea wells via a communications buoy on the field, which also provides chemical injection. Further innovations used on this project included two (2) subsea multi-phase flow meters, a subsea corrosion monitoring system and two (2) subsea heat exchangers to cool the produced fluid. Production from the field began in November 1996, one month earlier than planned.