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Mariner

Mariner workforce on the helideck
Mariner workforce on the helideck
Photo: Jamie Baikie
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A new chapter is underway for the Mariner field

Equinor has been producing from the Mariner field – our first operated development in the UK North Sea – since 2019 and the field is expected to produce for around 20 years.

Safe drilling, production, and logistical operations are top priorities of the Mariner field, with a high focus on maintaining strong onshore and offshore competence. Several projects are on-stream or in progress to reduce the field’s carbon footprint, including the Emissions Reductions Action Plan.

Mariner is one of our most innovative offshore developments, and Equinor is at the forefront of applying new digital solutions and the latest technologies at the field. Mariner A produces oil at approximately 25,000-30,000 barrels per day and flows from floating storage unit Mariner B, used for storage and offloading to transport vessels

Mariner on stream press release August 2019

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

  • Contracts worth more than USD 1.3 billion awarded

  • Located on the East Shetland Platform of the UK North Sea

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Mariner will contribute to energy supplies for years to come

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 acquired operatorship of Mariner in 2007 and the field is expected to contribute towards reliable energy supplies for years to come.

Mariner field

Investment in the UK

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 500 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.

Our activities in the UK

Below the surface

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

Maureen formation:

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

Heimdal reservoir :

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

Facts about Mariner

  • Equinor is the operator of Mariner with 65.11% equity. The partners are Equinor UK Limited (65.11%), ONE-Dyas E&P Limited (6%), NEO Energy Petroleum Limited (20%), Ithaca SP O&G Limited (8.89%)
  • Digital frontrunner in the North Sea applying new technology to deliver safe and efficient solutions
  • Production commenced in August 2019
  • Contracts worth more than USD 1.3 billion awarded
  • UK field development potential to 2040
  • Located on the East Shetland Platform of the UK North Sea, approximately 95 miles or 150 kilometres east of Shetland and 3