Usan is a producing conventional oil field located in deepwater in Nigeria and is operated by Esso Exploration and Production Nigeria . The field is located in block OML 138 (OPL 222P), with water depth of 2,805 feet.

An expansion project is associated with the Usan, namely Usan Future Phases. This project is currently in the feed stage.

Field participation details

The field is owned by TotalEnergies , China National Offshore Oil , Exxon Mobil and Chevron.

Production from Usan

The Usan conventional oil field recovered 62.29% of its total recoverable reserves, with peak production in 2014. The peak production was approximately 122.01 thousand bpd of crude oil and condensate. Based on economic assumptions, production will continue until the field reaches its economic limit in 2041. The field currently accounts for approximately 2% of the country’s daily output.

Remaining recoverable reserves

The field is expected to recover 184.9 Mmboe, comprised of 184.9 Mmbbl of crude oil & condensate. Usan conventional oil field reserves accounts 0.04% of total remaining reserves of producing conventional oil fields globally.

Contractors involved in the Usan conventional oil field

The key contractors involved in the Usan project as follows.

Design/FEED Engineering: Mecthroleum Nigeria


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.