Subsea7 has secured a tieback contract from Noble Energy EG Ltd., a subsidiary of Chevron, to link the Aseng field to the Alen platform. The deal, valued between $150 million and $300 million, will see the company install 19 km of flowline and 20 km of umbilicals in 800‑m waters, with offshore work slated for 2026.

The Aseng Gas Monetization Project is part of Chevron’s strategy to monetize gas resources in Equatorial Guinea. Subsea7 has operated in the country for nearly two decades, supporting offshore construction, inspection, maintenance and repair activities, and will manage engineering from its Paris office with support from Lisbon and local teams.

The contract covers the transport and installation of approximately 19 kilometers (about 12 miles) of rigid production flowline and 20 kilometers (about 12.4 miles) of umbilicals, along with associated subsea structures and tie‑ins. Work will be carried out in water depths of around 800 meters (about 2,625 feet). Subsea7’s senior vice president, David Bertin, said the award was an important milestone in the ongoing global relationship with Chevron, noting the company’s long‑standing presence in West Africa.

Project management and engineering activities are set to begin immediately, led from Subsea7’s Paris office with support from teams in Lisbon and Equatorial Guinea. The company classifies the contract as “substantial,” indicating a value in the range of $150 million to $300 million.

With the tieback contract in place, Subsea7 is positioned to deliver safe, high‑quality offshore installation services for Chevron’s Aseng Gas Monetization Project, reinforcing its role as a key partner in West Africa’s gas development pipeline.