Type:
Oil
Facility:
Production
Water Depth:
345
Installed:
1993
meters
Block:
6507/5
Design:
Floating concrete
Sub Structure:
290000
Topsides Wgt:
65000
tonnes
tonnes
Intro
Heidrun is a world-first floating concrete tension-leg platform (TLP) in the Norwegian Sea, producing both oil and gas since 1995. The installation sits over an extensive subsea template system and is connected to a permanently moored floating storage unit (FSU) for oil export, also serving gas export pipelines.
Field
The Heidrun field on Haltenbanken was discovered in 1985. Reservoirs include Lower and Middle Jurassic sandstones in the Åre, Tilje, Ile and Garn formations at ~2300-m depth. The development uses multiple subsea templates tied to the TLP, with water and gas injection for pressure support.
Facilities
Heidrun’s TLP supports ~51 production, ~24 sea water injection and one gas injection well drilled from the platform, anchored to seabed with tethers. Hydrocarbon processing includes separation, dehydration, gas compression and water handling; produced oil is transferred to the Heidrun B FSU for shuttle tanker export. Gas is exported via Haltenpipe to Tjeldbergodden and via ÅTS to Kårstø for further export. The platform integrates utilities (power generation, water injection systems, control systems) and supports subsea tie-backs including Dvalin gas through dedicated gas treatment modules. Long lifecycle design addresses structural loads, dynamic TLP mooring and subsea hydraulics.
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