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November 23, 2021

Forties Conventional Oil Field, UK

By Carmen

Forties is a producing conventional oil field located in shallow water in the UK and is operated by Apache North Sea. The field is located in block 21/10a ALL, 22/6a BRIMMOND AND FORTIES UNIT, 22/6a REST OF BLOCK EXCLUDING BRIMMOND, and 21/9a FORTIES UNIT AREA, with water depth of 3,411 feet.

An expansion project is associated with the Forties, namely Forties Development Project Phase 2. This project is currently in the feasibility stage.

Field participation details

The field is owned by Exxon Mobil, Royal Dutch Shell and Apache.

Production from Forties

The Forties conventional oil field recovered 99.54% of its total recoverable reserves, with peak production in 1980. The peak production was approximately 504.15 thousand bpd of crude oil and condensate and 158 Mmcfd of natural gas. Based on economic assumptions, production will continue until the field reaches its economic limit in 2022. The field currently accounts for approximately 2% of the country’s daily output.

Remaining recoverable reserves

The field is expected to recover 13.65 Mmboe, comprised of 13.36 Mmbbl of crude oil & condensate and 1.69 bcf of natural gas reserves.

Contractors involved in the Forties conventional oil field

Some of the key contractors involved in the Forties project as follows.

Other Contractors: Archer, Duxvalves and Shearwater GeoServices

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About Apache North Sea

Apache North Sea Ltd (ANSL), a subsidiary of Apache Corp, is an oil and gas exploration and production service provider. The company’s activities include production, exploration, development, and exporting of natural gas, crude oil, and natural gas liquids. ANSL operates its exploration and development facilities in the Beryl, Nevis, Skene, Nevis South, and Buckland fields. The company also holds non-operating interest in the Maclure and Nelson fields and its holds 97% interest in the Forties field. ANSL is headquartered in Aberdeen, 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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