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Kollsnes

Kollsnes is a major onshore gas processing plant in western Norway, operational since 1996, processing rich gas from Troll, Kvitebjørn and Visund fields. It separates natural gas liquids (NGL) from dry gas, compresses processed gas and sends it into continental export pipelines. It interfaces with offshore export pipelines and the Vestprosess NGL export system to Mongstad.

Operator: Gassco AS

Status: Operational

Kollsnes platform photo

Image Source: Gassco AS. (All rights belong to the original owner.)

Production: Gas

Operations start: 1990

Water depth: 0 m

Country: Norway

Block: NA

Type: Onshore

Field

The Kollsnes facility sits near Bergen and receives rich gas through Gassco-operated pipelines from Troll and other Norwegian continental shelf fields. It extracts NGL (ethane, propane, butane, naphtha) for hydrocarbon liquids markets and compresses dry gas for export via Statpipe, Europipe and Zeepipe.

Facilities

Kollsnes comprises multiple process trains for gas dehydration, mercury removal, NGL extraction, fractionation interfaces, and high-pressure gas compression. Rich inlet gas arrives via trunk pipelines; NGL components are separated and sent into the Vestprosess pipeline to Mongstad for further fractionation, storage, or export. Dry gas is compressed and conditioned for export into the integrated Gassled pipeline network (Statpipe, Europipe, Zeepipe). Utilities include power generation, heat recovery, flare systems, water treatment, and control rooms coordinating fieldwide pipeline operations. Safety systems cover emergency shutdowns, gas detection, and compressor protection. As a stable midstream hub, Kollsnes supports long-term processing capacity linked directly with offshore infrastructure and European gas markets.

Kollsnes layout
Image Source: Gassco AS. (All rights belong to the original owner.)

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