Mariner is a producing heavy oil field located in shallow water in the UK and is operated by Equinor UK. The field is located in block 9/11a ALL, with water depth of 361 feet.

Field participation details

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

Production from Mariner

The Mariner heavy oil field recovered 5.54% of its total recoverable reserves, with peak production expected in 2024. The peak production will approximately 68.79 thousand bpd of crude oil and condensate and 7 Mmcfd of natural gas. Based on economic assumptions, production will continue until the field reaches its economic limit in 2063. The field currently accounts for approximately 2% of the country’s daily output.

Remaining recoverable reserves

The field is expected to recover 384.9 Mmboe, comprised of 377.84 Mmbbl of crude oil & condensate and 42.36 bcf of natural gas reserves. Mariner heavy oil field reserves accounts 0.88% of total remaining reserves of producing heavy oil fields globally.

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.