St Malo is a producing conventional oil field located in ultra-deepwater in the US and is operated by Union Oil Company Of California. The field is located in block Walker Ridge 677, Walker Ridge 678, and Walker Ridge 634, with water depth of 7,040 feet.

An expansion project is associated with the St Malo, namely St Malo Stage 4. This project is currently in the construction stage, expected to start in 2023.

Field participation details

The field is owned by Chevron, Murphy Oil, Equinor, Petroleo Brasileiro, Eni and Exxon Mobil.

Production from St Malo

The St Malo conventional oil field recovered 66.45% of its total recoverable reserves, with peak production in 2018. The peak production was approximately 99.03 thousand bpd of crude oil and condensate and 24 Mmcfd of natural gas. Based on economic assumptions, production will continue until the field reaches its economic limit in 2041.

Remaining recoverable reserves

The field is expected to recover 82.18 Mmboe, comprised of 78.07 Mmbbl of crude oil & condensate and 24.65 bcf of natural gas reserves. St Malo conventional oil field reserves accounts 0.02% of total remaining reserves of producing conventional oil fields globally.

Contractors involved in the St Malo conventional oil field

Some of the key contractors involved in the St Malo project as follows.

Main EPC: Subsea 7

Other Contractors: Subsea 7

About Union Oil Company Of California

Union Oil Company Of California (Union Oil Company) is an upstream energy company. It is engaged in exploration and production activities of crude oil and natural gas. The company was formed on October 17, 1890 in Santa Paula, California, as the Union Oil Company Of California. In 2005, it was acquired by Chevron Corporation and became a wholly owned subsidiary. It ceased operations as an independent company and began operating as a subsidiary of Chevron Corporation. Union Oil Company is headquartered in California in the US.


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.