Share on: logo linkedin

Statoil awards Bressay Jacket FEED to SNC Lavalin

Statoil awards on time Mariner and Bressay FEEDs

Statoil awards Front End Engineering and Design (FEED) contracts to develop the $9.6 billion capital expenditure Mariner and Bressay according to plan.

Mariner and Bressay are very similar projects to produce ultra heavy crude oil offshore on the North Sea shallow water of the UK Continental Shelf (UKCS) but with different working interests.

In Mariner:

 – Statoil owns 61.5% and is the operator

 – ENI 28.9%

 – Nautica Petroleum 6%

In Bressay:

 – Statoil owns 81.625% and is the operator

 – Shell the remaining 18.375%

Because of the size and complexity of each individual project Statoil has decided to develop Mariner and Bressay in phases where Bressay should follow Mariner one year behind

In awarding the FEED for Bressay jacket in 2012, Statoil expects to make the final investment decision (FID) in 2013 for completion and commercial operation in 2018.

After Mariner, SNC Lavalin wins Bressay jacket FEED

Since SNC Lavalin had been awarded and had successfully completed the FEED for Mariner jacket , it was in good position to win the FEED for Bressay jacket.

From the conceptual study, Bressay jacket should be:

 – A sub-structure weighting approximately 20,000 t

 – Installed by 92 meters water depth

 – Running operations of  50 ultra heavy crude oil production wells

 – Supporting the Production, drilling and quarter (PDQ) topsides

After processing the ultra heavy crude oil on Bressay, the oil is:

 – Exported to a Floating storage unit (FSU)

 – Shipped by shuttle tankers

 The Floating storage unit (FSU) is designed to be normally unmanned operated

In addition to the ultra heavy crude oil, the FSU should also store the diluent to be injected in the wells to reduce the viscosity of the ultra heavy crude oil

Among other criteria, Statoil selected SNC Lavalin because of its expertise in barge-launched jackets.

The development and production of subsea ultra heavy crude oil fields require complex technologies with artificial lift and a great number of wells.

In Mariner and BressayStatoil intends to benefit from the successfully experience accumulated from Grane field in Norway and Peregrino field in Brazil.

In that respect Statoil will re-use the multi-branch technology to connect the greater number of wells on the seabed than the number of available slots on the platform.

In order to pump the mixture of ultra heavy crude oil, sand and water, Statoil will install in the seabed multiple electric submersible pumps (ESP) in combination water injection pumps. 

Statoil selected Aker for Mariner Topsides FEED

Aker Solutions is actually performing the Front End Engineering and Design (FEED) of the 26,000 t topsides for Mariner.

The topsides for Mariner and Bressay will be a bit different according to their respective capacities.

Mariner is designed to handle:

 – 320,000 b/d liquids

 – 80,000  b/d crude oil

Bressay will be smaller with:

 – 300,000 b/d liquids

 – 55,000 b/d crude oil

 With Front End Engineering and Design (FEED) contracts awarded to Aker Solutions and SNC Lavalin Mariner and Bressay project will load 700 persons in Aberdeen Statoil office in UK.

For more information and data about oil and gas and petrochemical projects go to Project Smart Explorer

Scroll to Top