Type:
Oil
Facility:
Production
Water Depth:
353
Installed:
2014
meters
Block:
6507/7
Design:
Floating steel
Sub Structure:
0
Topsides Wgt:
0
tonnes
tonnes
Intro
Heidrun STL-II is an offshore loading system (buoy) associated with the Heidrun oil and gas field in the Norwegian Sea. It functions as a dedicated crude oil offloading point from field infrastructure to shuttle vessels. The facility remains in service and supports export operations using buoy-connected hoses in the field’s deepwater environment.
Field
The Heidrun field lies on Haltenbanken in the Norwegian Sea, discovered in 1985 and producing both oil and gas since 1995. Developed with a large concrete tension-leg platform and subsea templates, it produces from Jurassic-age sandstone reservoirs with associated gas exports via pipeline and oil export via FSU/offloading systems.
Facilities
Heidrun STL-II is categorised as a loading system rather than a traditional production platform. It provides a stationary offloading point integrated with Heidrun’s production infrastructure, enabling shuttle tankers to take on crude oil produced and processed on the nearby TLP platform and routed through subsea flowlines. Oil offloading systems comprise buoyancy elements, submerged connection hardware and flexible transfer hoses engineered for North Sea conditions. They include metering and safety systems tailored for custody transfer, emergency shutdowns and hose handling. These facilities work in concert with Heidrun’s permanent floating storage and offloading vessel (Heidrun B) and the tension-leg platform’s topside separation, water/gas injection and export pipelines. Utility systems for the buoy include structural moorings, umbilical interfaces and remote control integration with Heidrun’s central control rooms, supporting stable long-term export operations in a harsh offshore environment.
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