Åsgard subsea compressors close to full availability

The two subsea compression trains at Statoil’s Åsgard field in the Norwegian Sea have exceeded 25,000 hours in operation with availability close to 100%.

Subsea compression system
Subsea compression system

Offshore staff

ZURICH, Switzerland – The two subsea compression trains at Statoil’s Åsgard field in the Norwegian Sea have exceeded 25,000 hours in operation with availability close to 100%.

According toMAN Diesel & Turbo, which supplied the HOFIM motor-compressor units, the limited interruptions to date were caused by failure of the power supply from the host platform.

The motor-compressors supplied to Statoil’s contractor Aker Solutions should help extend the productive life of the Åsgard field reservoirs by a further 15 years, in which more than 306 MMboe should be produced.

MAN Diesel & Turbo/Statoil’s qualification program called for a design that could withstand the harsh conditions of subsea environments.

The adapted subsea HOFIM features a tailored motor solution, casings designed for pressures up to 220 bar (3,191 psi), a seven-axes active magnetic bearing system, and a cooling gas extraction system.

Compressors maintain output as reservoir pressure at gas-producing fields drops over time. The two 11.5 MW HOFIM units at Åsgard are the world’s first compressors to operate 300 m (984 ft) below sea level.

08/16/2017

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