Norway Blocks 33/9 & 34/7
Landmark: North Sea’s Largest Subsea Project at Time of Completion
Project Overview
- Contract Award: 1992
- 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: 22
- Water Depth: 160 m (520 ft)
- Tree Type: Vertical
- Tree Pressure: 5,000 psi
- Tree Bore Size: 5"x2"
- Hydrocarbon: Oil/Gas
Project Ownership
- Petoro 30%
- ExxonMobil 25%
- StatoilHydro 22%
- ConocoPhillips 12%
- Shell 11%
Scope of Work
- Twenty-two (22) vertical 5"x2" 5,000 psi subsea trees
- North Field: two (2) production templates and one (1) injection template tied back to Statfjord "C"
- East Field: two (2) production templates and one (1) injection template tied back to Statfjord "C"
- Template with manifold and control distribution
- Electro-hydraulic system topside controls
- 68 km (42 miles) subsea control umbilical
- Intervention tool package with intervention control system, including module replacement tools and tie-in tools
- Mechanically oriented tubing hanger
- Stainless-steel block with Inconel-clad production/ injection valve seat pockets and ring grooves
- Remote retrievable choke bridge arrangement
- Pressure and temperature transducers on subsea tree and downhole
- Vertical wireline access for production and annulus through tubing hanger/subsea tree
- System integration, testing, installation assistance, service and maintenance
Comments
The Statfjord Satellite Project (SSP) comprises two (2) fields with a total of six (6) four-slot templates. Statfjord North Field and Statfjord East Field have two (2) production templates with three (3) production wells each, and one (1) water-injection template with four (4) injection wells each. The subsea templates are tied back to the existing Statfjord C (GBS) platform.
The project was executed as an EPC contract with total system responsibility for all technical and administrative interfaces and the fulfillment of all functional specifications. The template design is standardized for all six (6) templates. The subsea equipment is designed for diverless installation, operation and maintenance. Intervention technology is optimized through a common intervention system operating five (5) different ROTs (remote-operated tools).
The original contract included twenty-five (25) subsea systems of which twenty-two (22) went to SSP, two (2) to Sleipner East and West and one (1) to the Loke Field.