Woodside Energy has started the drilling campaign at the Trion Field in the ultra-deep waters of the Gulf of Mexico in partnership with Petróleos Mexicanos (PEMEX).
The start of drilling marks a milestone in the development of the Trion project and a step toward full field development following the final investment decision in 2023.
The drilling campaign covers 24 subsea wells that will be connected to the floating production unit Tláloc, which has a nameplate capacity of about 100,000 barrels per day. The development also includes associated subsea infrastructure and export systems for safe, efficient and reliable operations. Production from Trion will be loaded into the floating storage and offloading facility Chalchi, which has a capacity of 950,000 barrels.
The wells will be drilled by Transocean’s Deepwater Thalassa. The campaign will be supported by supply vessels and logistics services operating from ports in the state of Tamaulipas. Deepwater Thalassa arrived in Mexican waters on 5 March 2026.
Since the Trion final investment decision, engineering, procurement and operational planning activities have progressed in line with the approved development schedule. The project remains on track for first oil in 2028.
Trion is expected to generate direct and indirect employment opportunities and expanded participation for Mexican suppliers. Over the life of the project, Trion is expected to deliver more than $10 billion in taxes and royalties to Mexico.
Woodside Energy holds a 60 percent participating interest in Trion and is operator. PEMEX holds 40 percent.
