GE Announces Start-Up Of Two LM6000 Gas Turbines On Schiehallion FPSO

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August 12, 1998

GE Industrial AeroDerivative Gas Turbines (GE-IAD) announced the commercial start-up of two LM6000 aeroderivative gas turbines on the Schiehallion floating production, storage and off-loading vessel (FPSO). The LM6000s were sold and packaged by ALSTOM Gas Turbines Limited (ALSTOM), formerly European Gas Turbines Limited.

The Schiehallion field is operated by British Petroleum on behalf of its partners, Shell Expo, Murphy Petroleum, Amerada Hess and Statoil. Brown & Root was the project manager for the ship topside facilities. The turret was designed by Single Buoy Moorings, and Harland and Wolff built the FPSO. The FPSO is situated 200 kilometers west of the Shetland Islands.

Similar to conventional platforms, these FPSOs require compact and lightweight equipment to drive compressors and pumps to produce electrical and thermal power. The two ALSTOM RLM6000 gas turbine packages provide the main on-board power generation for the Schiehallion FPSO, together producing some 80 megawatts of electrical power. Waste heat recovery units designed and manufactured by Schack Engineering Ltd. each have an output of 30 megawatts thermal, and are used to supply the process heat requirement.

The Schiehallion FPSO incorporates two trains of oil separation and high-pressure gas compression. These trains, provided by Demag-Delaval, include two high-pressure compression modules (featuring three compressors for each module), and one injection compressor module with a single compressor.

The FPSO has a storage capacity of 950,000 barrels of crude oil. The oil can be off-loaded on to shuttle tankers at the rate of 600,000 barrels per 24-hour period.

The vessel is permanently moored by means of a forward top mounted internal turret system, which holds the FPSO on station during survival storm conditions. Fourteen mooring chains anchor the vessel in approximately 400 meters of water.

ALSTOM is a packager of GE-IAD equipment, and is headquartered in Lincoln, United Kingdom.

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