Goliat

Swiss automation company ABB has commissioned a subsea power link for Eni Norge to supply clean power from the Norwegian grid to the Goliat floating, production, storage and offloading unit (FPSO).

The Goliat oil field is located in the in the production licence 229 in the Barents Sea north of Russia and Norway and has the capacity to process up to 100,000 barrels of oil a day.

Goliat can store nearly a million barrels of oil and will later on transfer it to shore with the help of tankers.

ABB’s 105.5km high-voltage alternating current (AC) three-core subsea power cable system includes a 104km long static cable section on the sea floor, and a dynamic cable section that is 1.5km long.

The cable section hangs in the water between the platform and the seabed.

It can withstand substantial mechanical stress and fatigue caused by currents, waves and the field’s vertical movement.

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"Reliable shore supplied power from the mainland grid will help to reduce the Goliat platform’s environmental impact, and ensure a safe and efficient operation."

Due to its high-power rating, increased energy supply is possible when required to provide power for additional fields in the future using similar cable system.

The link has a capacity of 7MW, 123kV and will supply around 50% of the platform’s electricity needs from shore.

This would lead to a reduction in carbon dioxide emissions by half due to reduced fossil fuel consumption in the gas turbines.

ABB Grid Systems business managing director Patrick Fragman said: "Reliable shore supplied power from the mainland grid will help to reduce the Goliat platform’s environmental impact, and ensure a safe and efficient operation."

The Goliat field has the Kobbe and Realgrunnen reservoirs and contains oil with an overlying gas cap.


Image: The Goliat platform is located in the production licence 229 in the Barents Sea. Photo: courtesy of ABB.