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Equinor has started production from the Mariner field, our first operated development in the UK North Sea. The field is expected to produce more than 300 million barrels of oil over the next 30 years.

The start of production from Mariner is a significant milestone, reinforcing Equinor’s commitment to be a long-term energy partner for the UK. One of the largest industrial projects in the UK in recent years—a gross investment of more than USD 7.7 billion – Mariner supports over 700 long term jobs and will generate significant revenue in the supply chain for decades to come.

Mariner is one of our most innovative offshore developments, and Equinor is at the forefront of applying new digital solutions and the latest technologies. We are testing new ground through our offshore digital workers, automated drilling and the use of Echo, a digital copy of the platform, to deliver safe and efficient solutions.

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Digital frontrunner in the North Sea applying new technology to deliver safe and efficient solutions

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Contracts worth more than USD 1.3 billion awarded 

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Located on the East Shetland Platform of the UK North Sea

A new chapter is underway for the Mariner field.

The Mariner field will contribute towards reliable energy supplies for the next 30 years and, with up to 3 billion barrels of oil in place, offers significant potential to create even more value to 2050 and beyond.

Discovered in 1981, the Mariner field was left untouched due to the complexity of the reservoir. In 2007, we acquired the operatorship, and through new ways of thinking and new technology, we started to find ways to meet the challenges laid down by this demanding field.

The Mariner field is located on the East Shetland Platform in UK Block 9/11a in the northern North Sea approximately 150 kilometres east of the Shetland Islands. The field development concept includes the Mariner A production, drilling and living quarters (PDQ) platform based on a steel jacket with a floating storage unit (FSU), Mariner B. Drilling will be carried out from the PDQ drilling rig together with a jack-up rig assisting during the initial phase.

Equinor and its partners made the investment decision for the Mariner project in 2012. A gross investment of more than USD 7.7 billion, it is one of the largest capital commitments to the UK Continental Shelf (UKCS) in recent years.

The Mariner field employs over 700 people, offshore and onshore, contractors included. With contracts worth more than USD 1.3 billion awarded, it will support a significant level of investment and jobs in the UK supply chain for many years to come.

Image of Digitalisation at Mariner

Below the surface 

The Mariner oil field consists of two shallow reservoir sections: the deeper, Maureen formation and the shallower Heimdal reservoir.

The Mariner field is expected to produce more than 300 million barrels of oil. The recoverable reserves have been increased by 20% from 250 million to 300 million barrels of oil through better understanding of the reservoirs and new seismic technology.  With up to 3 billion barrels of oil in place, there is great potential to create even more value from the field in the long term.

Mariner field

Maureen formation: 

  • 1492 meters
  • API gravitiy: 14.2 
  • Viscosity: 67 cP 

Heimdal reservoir :

  • 1227 meters
  • API gravitiy: 12.1 
  • Viscosity: 508 cP

Mariner facts

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  • Equinor is the operator of Mariner with 65.11% equity. The partners are JX Nippon (20%), Siccar Point (8.89%) and ONE-Dyas (6%) 
  • Digital frontrunner in the North Sea applying new technology to deliver safe and efficient solutions 
  • Production start August 2019
  • Contracts worth more than USD 1.3 billion awarded 
  • Recoverable reserves increased from 250 to 300 million barrels of oil 
  • Up to 3 billion barrels of oil in place offering significant upside for the development in the future
  • Long-term UK field development to 2050
  • Located on the East Shetland Platform of the UK North Sea, approximately 95 miles or 150 kilometres east of Shetland and 320 kilometres north-east of Aberdeen

Mariner hook up

Heavy lifting campaign

Sailaway