Project Profile
Value: US$10,000 million
Location: Block 3/28b, Block 9/2a, Block 9/3a, Block 9/11a, Blook 3/27b and Block 3/28a
Upstream Oil Reserves: 640 million bbl
Water Depth: 100m
Start-up Year: second half of 2018
The project will see the proposed development of East of Shetland Heavy Oil clusters, which will include the Bressay and Mariner fields. The two fields are believed to hold recoverable reserves of 640 million barrels. The Mariner is expected to produce 60,000 b/d and Bressay 50,000 b/d. Statoil expects that the fields have a lifespan of 30 to 40 years.
Mariner will be developed with a fixed production, drilling and quarters platform with 60 well slots, connected to a floating storage unit (FSU), with oil to be transported by tankers. The 30,000 tonne topsides will sit on a 19,800 tonne jacket and will comprise of two permanent drilling units to handle the up to 145 wells that may be needed at Mariner, as well as an electrical submersible pumping pulling unit. The topsides must be able to produce 60,000 barrels per day of oil, and handle 300,000 bpd of liquids for reinjection. Up to 63 production wells and 38 water injection wells will be drilled at Mariner between 2014 and 2018.
The platform will be fuelled by natural gas to be imported from either the Frigg UK (FUKA) pipeline or the Vesterled pipeline. Bressay will be brought on stream a year later, with the same development scheme; a fixed platform with a FSU. Mariner consists of two reservoirs: Maureen at about 1,500 metres containing 15-degree API crude, which is overlayed by a viscous 11-degree API crude in the Heimdal reservoir at about 1,200 metres. The Bressay reservoir lies at 1025 metres and also contains 11-degree API oil. The commencement of production from the Mariner field has been delayed from 2017 to the second half of 2018.
The 255 metres long Mariner B FSU is part of the Mariner development on the East Shetland Platform of the UK North Sea, approximately 150 km east of the Shetland Isles. The unit is built to be operated for at least 30 years on the field without docking during that time period. The unit will have the capacity to store roughly 850,000 barrels, of which about 150,000 barrels of storage will be reserved for diluent. The diluent will be mixed with the heavy Mariner oil during the production process to enhance processing and increase the value of the crude. (September, 2016)
The steel jacket has already been put in place in September 2015, while the drilling will be done through the jacket via jack-up rig Noble-Lloyd-Noble.
Operators:
Statoil: Operator of Mariner and 65.11% interest and operator of Bressay and 81.625% interest
Chrysaor : 18.372% interest in Bressay
JX Nippon Oil and Gas Exploration: 19.99% interest in Mariner
Dyas Mariner Ltd.: 6% interest in Mariner
Siccar Point Energy (JV between Blue Water Energy and Blackstone): 8.9% interest in Mariner
Transocean: Contract for the semi-submersible rig Transocean Spitsbergen (April, 2017)
Contractors:
ABB: internal and external telecommunication systems
Aker Solutions: Conceptual Design for Mariner and FEED for Mariner platform topsides. In 2014 won a contract for maintenance and modification (M&M) work. In December 2014, contracted to provide engineering, construction and commissioning services for the hook-up phase.
Daewoo Shipbuilding & Marine Engineering: Detailed engineering design
- Statoil cancelled the order for the fixed platform. (August, 2016)
DNV: Independent Competent Person (ICP) contract
EMAS AMC: Transport and floater installation contract
Emerson Process Management Ltd: Supply of pressure and temperature measuring equipment
Noble Corp: Newbuild ultra-high specification jackup
Odfjell Drilling: Perform drilling services, maintenance of the drilling facility and drill pipe logistics
Prosafe: Provide floating accommodation support
Samsung Heavy Industries: Build the FSU
Sevan Marine: Study for the potential application of a Sevan cylindrical FPSO bridge-linked to a wellhead platform
SNC-Lavalin: Front-end engineering for approximately 20,000 tonne substructure
Subsea 7: EPIC contract of the 24 miles of rigid flow lines and flexible riser systems
Wärtsilä: supply its vessel internal electrostatic coalescer (VIEC) systems for three new oil field developments in the North Sea
WorleyParsons: Bressay field conceptual design
Wood Group Kenny: Verification of the Mariner subsea, umbilicals, risers, and flowlines scope
CHC Helicopter: Helicopter transportation contract for the Mariner Field. (September, 2014)
- Initially operate one Sikorsky S-92 aircraft, to support the Mariner B FSU and the Noble jack-up drilling rig due to be on location in 2016.
- Helicopter support increases to two S92 aircraft during the main hook-up and commissioning phase from mid-2017.
OSM Offshore: Contract to operate its Mariner floating storage unit in the UK North Sea under a five-year deal.
Schlumberger Oilfield UK Plc: Integrated drilling and well services on the Mariner field on the UK continental shelf (UKCS) to Schlumberger Oilfield UK Plc. From its Aberdeen base, Schlumberger will deliver all the main drilling and well services for Mariner, including drilling, completion, electrical submersible pumps (ESPs), cement and fluids.
Asco Group: A pair of long-term contracts from Statoil for supply base and warehousing services at US$7 billion Mariner heavy-oilfield development.
Sentinel Marine Limited: Contract to provide a new multi role Emergency Response & Rescue Vessel (ERRV) to support operations on the Mariner field on the UK Continental Shelf (UKCS).
IKM Testing: Contract for commissioning services on the Mariner topside project. On the topside, IKM Testing will do the N2/He leak testing, but the contract leaves options for bolt work, hot oil flushing, chemical cleaning and flange machining. The work will include personnel, equipment and consumables. The topside has been under construction in South Korea at Daewoo Shipbuilding Marine & Engineering (DSME) yard. The contract awarded to IKM Testing includes the work that starts in South Korea in the fourth quarter 2015 and will continue after the topside arrives the Mariner field in the UK. The topside is expected to reach its offshore UK location in mid January 2016. IKM Testing’s subsidiaries in South Korea, Singapore and the UK will assist with personnel and equipment to the project.
Baker Hughes: Contract to design and supply production chemicals and services to the Mariner field under an eight year contract, anticipated to start in July 2015. The contract also includes an extension option of four years.
Tenaris: contract for the supply of casing, tubing and all related services for the Mariner Project. Tenaris will be providing TenarisHydril Blue® connections with Dopeless® technology and TenarisHydril Wedge™ connections with Dopeless® technology, together with a full range of services including demand planning, inventory management, delivery to the well, rig returns and repairs that will be managed from Tenaris’s facilities in UK. (June, 2015)
ESS Offshore (part of Compass Group UK & Ireland): Contracts for the catering and facilities services. The offshore catering and facilities contract was awarded to Aberdeen-based ESS Offshore and includes the provision of offshore catering services to the Mariner A platform and Mariner B floating storage unit, as well as housekeeping services, helideck operations and emergency response duties. The agreement is due to start in 2016 and is set for a term of 5 years. (November, 2015)
Tracerco (subsidiary of Johnson Matthey): Contract to provide smart tracer technology for flow measurement of six new wells in Statoil’s Maureen reservoir of the Mariner field in the UK North Sea. As part of field development, Tracerco’s smart tracers should enable fluid inflow measurement of both oil and water in various zones within the long horizontal wells. (December, 2015)
Sparrows Group: Initial five-year contract to deliver cranes and maintenance services (March, 2016)
Petrofac Training Services: Training and emergency response services. (September, 2016)
- provision of a wide range of HSE, survival, fire and marine training services.
National Oilwell Varco: Contract to build water treatment package ifor the Mariner platform
Sub contractors:
Aker Solutions: Deliver the drilling equipment package for DSME
Amarinth: Deliver complex skid package with an API 610 OH2 pump for a water treatment package for a de-sanding application for contractor National Oilwell Varco (Delivered in 2016)
CB&I: Topsides contract awarded by DSME
KCA Deutag: Detail design and follow-on engineering and front-end engineering design work for DSME
Wärtsilä: Provide pumps for a new floating storage unit (FSU) for Samsung Heavy Industries
Palfinger: Package of three travelling cranes and two foldable knuckle boom cranes to Aker Solutions for the use at the Mariner platform
RigNet: Hired for communications services at field