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StatoilHydro plans Troll updates

Offshore

Offshore staff

STAVANGER, Norway -- StatoilHydro has submitted a new plan to develop and to operate Troll field to ensure the long-term management of the oil and gas reserves in Norway's largest gas field.

The plan was submitted to the Ministry of Petroleum and Energy and is a step towards improved oil recovery on Troll West, while providing for continuation of the current gas export capacity from Troll East.

The plans maintain a gas production level of 120 MMcm/d (4,238 MMcf/d) until a need for further compressor capacity arises due to pressure drop in the reservoir.

The Troll partners' new plan has an investment limit of almost NOK10 billion ($1.97 billion). It includes a new gas injection plant for improved oil recovery on the Troll B platform, and a new 35-in (89-cm) rich gas pipeline from the Troll A platform to the Kollsnes gas plant, and modifications on Troll A and the Kollsnes terminal.

Production pipes in the gas wells running up to Troll A in the Troll East area will be replaced and the diameter of the pipes will be increased, for lower pressure drop and increased production from the wells.