Norwegian oil and gas company StatoilHydro has reported that its Oseberg field satellites, the Oseberg Delta and the Theta Cook, have come on stream adding considerable production volumes.

Oseberg Delta and Theta Cook will jointly produce some 18,000 barrels of oil equivalent per day. When the second well on Oseberg Delta comes on line in autumn 2008, an additional 7,000 barrels per day volume is expected to be added.

Another deposit in the Oseberg area, the Oseberg Gamma Main Statfjord, also came on stream recently. Put together all these developments add more than 35,000 barrels of oil per day to the Oseberg area.

Theta Cook is located in the north western part of the Oseberg field, and is drilled through a long-reach well from the Oseberg C platform. This is the first well from the Oseberg field centre producing from the Cook formation. Drilled in April 2008, the well was quickly completed, which allowed it to come on stream at an early stage.

Oseberg Delta was discovered 10 years ago in the western part of the Oseberg area. The plan for development and operation (PDO) was approved by the Norwegian Ministry of Petroleum and Energy in September 2005.

Natural gas deposits represent the bulk of the reserves, but the field’s 20m thick oil column will be produced first. This well is expected to gradually switch to gas production.