Statoil Set to Make $7 Billion Investment in the UK North Sea

Statoil ASA, Norway’s biggest oil and gas producer, will invest more than $7 billion in its Mariner project, the largest offshore development in the U.K. North Sea in more than a decade.

The Stavanger-based company plans to start production from Mariner in 2017, it said in a statement today. The field is expected to produce for 30 years with a plateau output of 55,000 barrels of oil a day in the first three years.

“We are satisfied that we now are able to make an investment decision for a profitable development of the Mariner field,” Lars Christian Bacher, Statoil executive vice president for international development and production, said in the statement.

mariner platform statoil — The integrated PDQ steel jacket platform will provide services for the reception of reservoir fluids, processing and offloading of crude for the Mariner Area Development. The PDQ platform will be supported by a FSU that will have the capacity to store quantities of crude and light oil. Light oil (diluent) will be used at the Mariner Area Development to dilute the crude oil, reducing its viscosity and density. The diluent will be supplied by shuttle tankers and stored onboard the FSU, and will then be transferred from the FSU into the production stream up-stream of the ESPs and as needed into theprocess on the Production Drilling Quarters (PDQ) platform. Courtesy Statoil

Statoil’s investment decision comes five years after it entered the license as operator and 31 years after the Mariner heavy oil field was discovered. Offshore oil production in the U.K. has fallen by more than 60 percent since 1999 to about 48 million tons in 2011, according to figures from the Department of Energy and Climate Change.

Japan’s JX Nippon Oil and Gas Exploration Corp. said yesterday it had acquired Eni SpA’s 28.89 percent stake in the Mariner field, which is located 150 kilometers east of the Shetland Isles. Statoil owns 65.11 percent of the license, with Alba Resources Ltd., a wholly owned subsidiary of Cairn Energy Plc., holding the remaining 6 percent.

mariner platform jack up rig statoil — Illustration of the Mariner platform and jack-up drilling rig, courtesy Statoil

Steel Jacket

Mariner will be developed with a production, drilling and quarters platform on a steel jacket, and a floating storage unit with a capacity of 850,000 barrels The contract for engineering, procurement and construction of the jacket has been awarded to Dragados Offshore SA, while Daewoo Shipbuilding & Marine Engineering Co. has won the topside contract, Statoil said in the statement. The contracts are valued at a total 1.2 billion pounds ($1.9 billion).

“We have seen a lot of interest from the supplier industry for the Mariner project,” said Anders Opedal, Statoil’s senior vice president for projects.

Statoil will award the contract for the FSU and a tailor- made jack-up rig in the second quarter of 2013. Statoil will also invite contractors to tender for risers, pipelines, umbilicals, flowlines, power cables and marine operations before the end of the year, with awards in the second quarter.

Statoil will make its final investment decision for the Bressay North Sea field in 2013, it said in today’s statement.