BP Selects Platform Concept for Valhall

Following the redevelopment of the Valhall field the partners have agreed on a combined accommodation and process platform to replace the existing three platforms. This was agreed on April 21st in a partner meeting. The option was a combined platform or two separate platforms one for accommodation and one for processing.

At the same time it has also been decided to take the power supply from shore via a 292 kilometers long power cable from Lista (south west of Norway). This means that the old gas turbines will be shut in permanently when the new platform is in operation during 2009. The partners of the Valhall license have not yet made the financial decisions for the field development which is estimated to be approximately NOK 6 billion of which the power cable accounts for NOK 1 billion.

There are several reasons why the Valhall field will have a new platform, the primary one is the subsidence of the field and that the current platforms are old (production started in 1982) and resource demanding to operate, the life time of the field is heading towards 2040. A fibre optic cable will be buried together with the power cable. This will increase the capacity and reduce the risk of outage as the field then will have two fiber optic cable connections.

The electricity for Valhall will be purchased on the Nordic electricity market Nordpool on long term contracts. Power from shore to Valhall will save the environment of approximately 300 000 tons of CO2 per annum from 2010 to 2018, thereafter 200 000 tons per annum. NOx-emissions will be reduced with 250 tons per annum.

Until the license period expires in 2028 the total CO2 reductions will reached 4,4 million tons.

The benefits of power form shore are several:

  • less complicated system and more effective operations
  • less weight and less costly jacket
  • improved working environment (less noise and pollution)
  • improved safety (less risk of fire and explosion)
  • together with the fiber optic cable this provides opportunity for optimum operations
  • the gas that is to day used for production of power offshore will be exported for more effective use at the continent