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April 28, 2022

Mariner East Heavy Oil Field, UK

By Carmen

Mariner East is a heavy oil development located in shallow water in the UK and is operated by Equinor UK. Discovered in 1997, Mariner East lies in block 9/11b ALL, with water depth of around 340 feet.

The project is currently in construction stage and is expected to start commercial production in 2023. Final investment decision (FID) of the project was approved in 2012. The Mariner East heavy oil development will involve the drilling of approximately four wells and includes subsea manifold and subsea trees.

Field participation details

The field is owned by Equinor, ONE-Dyas, Siccar Point Energy and JX Nippon Oil & Gas Exploration.

Production from Mariner East

Production from the Mariner East heavy oil development project is expected to begin in 2023 and is forecast to peak in 2024, to approximately 15,618 bpd of crude oil and condensate. Based on economic assumptions, the production will continue until the field reaches its economic limit in 2070.

Remaining recoverable reserves

The field is expected to recover 24.9 Mmboe, comprised of 24.9 Mmbbl of crude oil & condensate.

Contractors involved in the Mariner East heavy oil field

Some of the key contractors involved in the Mariner East project as follows.

Main EPC: Actividades de Construccion y Servicios and Subsea 7

EPC Contractors: SIF Group

Other Contractors: Apply, CSUB, Jotun, Norwegian Piping and PGS

About Equinor UK

Equinor UK Ltd (Equinor), formerly Statoil (U.K.) Ltd is an oil and gas company that explores, develops, markets and supplies natural gas and crude oil. The company’s activities include offshore wind, upstream operations, natural gas trading and crude oil sales. It carries out offshore operations to develop various offshore wind technologies and projects. Statoil UK’s wind projects include Sheringham Shoal wind farms, Dogger Bank offshore wind project, Hywind Scotland Pilot Park and Dudgeon wind farms. The company owns oil and gas properties in the UK continental shelf. It trades and markets gas to industrial customers across Europe. The company operates through its office located in Aberdeen, the UK. Equinor is a subsidiary of Statoil ASA and headquartered in London, the UK..


Information on the field is sourced from GlobalData’s fields database that provides detailed information on all producing, announced and planned oil and gas fields globally. Not all companies mentioned in the article may be currently existing due to their merger or acquisition or business closure.

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