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StatoilHydro submits new plan for Troll field


Published Jun 30, 2008
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StatoilHydro submits new plan for Troll field

StatoilHydro submitted a new plan for the development and operation (PDO) of the Troll field on 27 June, to ensure the long-term management of the oil and gas reserves in Norway’s largest gas field.

The plan submitted to the Ministry of Petroleum and Energy today is a new and important step on the road towards improved oil recovery on Troll West, while providing for continuation of the current gas export capacity from Troll East of 120 million standard cubic metres per day.

”Our goal is to manage the natural resources in an optimal way through a holistic approach to the development of the Troll field and the neighbouring areas,” says Hege Marie Norheim, senior vice president for StatoilHydro’s reserve and business development on the Norwegian continental shelf.

”The field has been in continuous development since it came on stream, and we are now making Troll more robust for the future. StatoilHydro will, as the operator of both Troll Gas and Troll Oil, make sure to take care of the long-term management of our largest oil and gas field in an optimal way,” she says.

The development of the oil and gas resources in the Troll field has been addressed in several field development plans since the 1980s. The Troll partners’ new plan has an investment limit of almost NOK 10 billion, and includes:

• a new gas injection plant for improved oil recovery on the Troll B platform

• a new 35-inch rich gas pipeline from the Troll A platform to the Kollsnes gas plant, including modifications on Troll A and the Kollsnes terminal

• replacement of production pipes in the gas wells running up to Troll A in the Troll East area. The diameter of the pipes will be increased, which results in lower pressure drop and increased production from the wells

Gas injection in Troll West will increase the oil reserves at Troll by 17 million barrels. The offshore modifications are scheduled to start during 2008.

The gas injection plant will be in place by the turn of the year 2010/2011. The new rich gas pipeline designed to maintain the daily gas production capacity will come on stream in 2011.

”The new development plan is an overall description of our plans for the oil production at Troll and provides for profitable oil production through 2030. This will also result in increased production possibilities for neighbouring fields, as we will have processing capacity available for a longer period than previously expected,” Norheim says.

StatoilHydro has been working to ensure profitable recovery of the thin oil zones in the Troll field since the mid-1980s. The Troll oil production system consists of more than 110 horizontal wells, several of which are multi-lateral.

Horizontal high-precision drilling and production wells with up to six producing well bores have been developed in close collaboration with StatoilHydro’s drilling and well technology suppliers.

StatoilHydro will continue its efforts to develop and employ new know-how and technology in order to ensure optimal capture of value related to the Troll oil resources, and believes that a considerable potential exists to increase the recoverable reserves in the field.

Three chartered drilling rigs are current drilling production wells on the field. Long-term contracts have been signed in order to maintain the drilling activity at this level.

Troll is Norway’s largest gas field and the plan provides for maintaining a gas production level of 120 million standard cubic metres per day until a need for further compressor capacity arises due to pressure drop in the reservoir.

”In order to achieve this we will invest in a new pipeline from Troll A to Kollsnes and perform modifications on the platform and gas processing plant. This is important work which underpins Troll’s key role as a long-term, reliable source of gas supplies to Europe,” Norheim says.

Tags: StatoilHydro, Troll field




   

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