Type:
Oil
Facility:
Production
Water Depth:
127
Installed:
2002
meters
Block:
46351
Design:
Fixed steel
Sub Structure:
17143
Topsides Wgt:
22841
tonnes
tonnes
Intro
Grane is a fixed jacket offshore production platform in the central Norwegian North Sea, installed in 2003 to develop the Grane oil field. It integrates drilling, processing, and living quarters in a single structure producing heavy crude oil. The platform is a central node for subsea tie-backs and export pipelines, with long-term service in the region.
Field
The Grane field, discovered in 1991 and located ~185-km west of Haugesund, produces heavy crude from Paleocene Heimdal Formation sandstones at ~1-700-m depth beneath ~130-m of water. It is one of Norway’s major heavy oil developments, with additional tie-backs such as Svalin.
Facilities
The Grane platform is a large steel jacket installation with integrated topsides housing drilling facilities, multiphase separators, and utility systems. It supports up to ~40 well slots for production and injection wells, with horizontal drilling programs to optimise recovery. Hydrocarbons from production wells undergo primary separation topside: crude oil is stabilised and metered before export via a dedicated pipeline to the Sture onshore terminal, where storage and further transport to markets occur. Associated gas is reintroduced into reservoir zones via gas injection for pressure maintenance, with import gas lines from nearby Heimdal enhancing injection capacity. Utility systems on the Grane platform include power generation (gas turbines), water treatment, produced water handling, gas compression for reinjection and lift, living quarters with safety systems, and integrated control and safety shutdown infrastructure. The fixed platform connects to subsea flowlines and control umbilicals, and its design accommodates harsh North Sea environmental loads, redundancy for critical processing trains, and comprehensive fire and gas detection systems typical of long-life offshore production hubs.
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