Statoil has awarded Maersk Drilling contract for chartering a completely new jack-up rig for the Dagny field on the Norwegian continental shelf (NCS).
The jack-up rig will drill on the Dagny oil and gas field in the North Sea. Earlier this year Statoil and its partners chose a fixed processing platform concept, by which the gas is to be connected to the Sleipner field while the oil is to be transported by ship.
Before the investment decision is made, the selected solution is to be quality-assured in part through various design studies (FEED), which are now taking place.
The investment decision is expected at the end of 2012/beginning of 2013, with estimated production start at the end of 2016.
“This will be a completely new jack-up drilling rig that is to be built at KeppelFels in Singapore. It will be the third of this type of rig built with the CJ-70 design. Valued at USD 605 million, the contract runs for four years with two one-year options,” says Jon Arnt Jacobsen, chief procurement officer at Statoil.
“This type of jack-up is not a new rig category, but is part of what we describe as conventional rigs, so-called category C.”
Production drilling is scheduled to start the summer of 2015 by pre-drilling through the jacket before the platform deck is installed the summer of 2016. With pre-drilling, production from Dagny can be accelerated.
“Dagny and its satellite tie-in Eirin are among Statoil’s major developments, containing an estimated 300 million barrels of oil and gas, and we are satisfied that Statoil has now ensured capacity in the rig market in connection with this. The field development will extend the life and utilise the available capacity on Sleipner for many years to come,” says Ivar Aasheim, senior vice president for NCS Field Development at Statoil.
Long assumed a minor gas discovery just north of Sleipner, Dagny is a field whose development has been considered on several occasions since its discovery in 1974.
Once oil and gas were proven in the neighbouring structure Dagny Øst (formerly Ermintrude) in 2007, the landscape around Dagny was reassessed.
Further delineation in the period 2008 to 2011 established a connection between Dagny and Dagny Øst along with substantial volumes of oil underneath the entire structure. Subsea development with tie-in to the planned Dagny platform has been selected for the adjacent Eirin gas field.
The new jack-up is a CJ-70 type rig. A newbuild, it will be built at KeppelFels in Singapore. It is the third in a series of identical rigs. The two previous rigs, which are also under construction, are, respectively, under contract for Total and Det Norske in 2014/2015.
Dagny is located 30 km north of Sleipner and Eirin is 9 km from Dagny
Dagny was originally discovered in 1974 and Eirin in 1978. Dagny Øst (formerly Ermintrude) was proven in 2007
Dagny and Eirin volumes are estimated at 300 million barrels (oil and gas)
Reservoir depth is approximately 3,500 metres, water depth is about 120 metres
Expected investments total NOK 25-30 billion for both Dagny and Eirin (including rig chartering and drilling costs)
Partners and preliminary breakdown in Dagny licences (PL029, PL029B, PL048 and PL303): Statoil (O) 58.5%, ExxonMobil Exploration and Production Norway AS 33%, Total E&P Norge AS 6.5% and Det norske oljeselskap ASA 2%. The final distribution of ownership interests will be subject to negotiations in the period leading up to the development decision.
Partners and distribution in Eirin licence (PL048E): Statoil (O) 78.2%, Total E&P Norge AS 21.8%.
Statoil awards offshore drilling contract