Norway Block 25/5
Landmark: Equipment Delivery in 10 Months from Order
Project Overview
- Contract Award: 2002
- Sales: Kongsberg, Norway
- Fab. Trees: Dunfermline, U.K.
- Fab. Controls: Kongsberg, Norway
- Service Base: Bergen, Norway
- Host Type: Platform
- Contract Type: EPC
Project Characteristics
- No. Trees: 2
- Water Depth: 120 m (390 ft)
- Tree Type: Enhanced Horizontal
- Tree Pressure: 10,000 psi
- Tree Bore Size: 5"x2"
- Hydrocarbon: Gas
Project Ownership
- Total 40%
- Petoro 30%
- Marathon 20%
- Norsk Hydro 10%
Scope of Work
- Two (2) horizontal 5"x2" 10,000 psi subsea trees
- Two (2) UWD-15 wellhead systems
- Two (2) subsea control modules
- Retrievable production chokes
- Two (2) permanent guidebases
- Two (2) separately installed overtrawlable protection structures including sealine production
- Electro-hydraulic control system based on extension of Vale subsea power and communication unit with Brayco SV200 hydraulic fluid
- Workover control system based on several units from the Vale WOCS with rented hydraulic power units and umbilicals
- Diverless tie-in system (based on ROVCON® Mk I)
- System integration, testing, installation assistance, service and maintenance
Comments
Skirne and Byggve are gas condensate fields located to the east of the Heimdal platform. Skirne was discovered in 1990 and Byggve in 1991. The Byggve satellite is located 16 km (10 miles) east of the Heimdal platform. The Skirne satellite is 24 km (15 miles) east of the platform and is daisy chained from Byggve.
The development is based on these two (2) single subsea satellite stations, both in 120 m (390 ft) water depth. In 2002, the Skirne Byggve plan for development and Operation (STFT) was submitted and the Norwegian Cabinet approved the development of the fields. The Skirne Byggve team focused on developing the fields, making use of the Heimdal Gas Center for treatment and export. The condensates are exported to Scotland via the Norwegian subsea Vesterled pipeline. Production of the two (2) subsea wells started early 2004 and reached a production rate of 34,000 boepd in 2004. The expected production duration is estimated to be six years.