Usan is a producing conventional oil field located in deepwater in Nigeria and is operated by Esso Exploration and Production Nigeria. According to GlobalData, who tracks more than 34,000 active and developing oil and gas fields worldwide, the field is located in block OML 138 (OPL 222P), with water depth of 2,805 feet. Buy the profile here.

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

Field participation details

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

Production from Usan

The Usan conventional oil field recovered 68.65% 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 2038. The field currently accounts for approximately 2% of the country’s daily output.

Remaining recoverable reserves

The field is expected to recover 146.99 Mmboe, comprised of 146.99 Mmbbl of crude oil & condensate. Usan conventional oil field reserves accounts 0.03% of total remaining reserves of producing conventional oil fields globally.

Contractors involved in the Usan conventional oil field

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

Design/FEED Engineering: Mecthroleum Nigeria

Other Contractors: United Refining, Ashtead Technology, STAT Marine Nigeria and Fairtex Integrated Services

For more details on the Usan Conventional Oil Field, buy the profile here.


GlobalData, the leading provider of industry intelligence, provided the underlying research used to produce this article.

This information is drawn from GlobalData’s Oil & Gas Intelligence Center, which provides detailed profiles of 34,000+ oil and gas fields, 400,000+ exploration blocks, 1,100+ LNG terminals, 3,400+ gas processing plants, 5,000+ storage terminals, and 8,000+ pipelines, 1,400+ refineries and 13,000+ petrochemical plants worldwide.