Harbour Energy plc has agreed to sell its operated interests in Natuna Sea Block A field and the Tuna development project in Indonesia to Prime Group International.
The deal includes Harbour's 28.67% operated interest in Natuna Sea Block A, which produced about 4,000 boe/d net in the first 9 months of 2025 and held 7.4 MMboe of 2P reserves at year-end 2024, and its 50% operated interest in the Tuna project, which had 54 MMboe of 2C resources at year-end 2024.
Prime will purchase the assets for $215 million. The sale is subject to customary regulatory approvals and completion is targeted for second-quarter 2026.
Following the sale, Harbour will retain interests in the Andaman Sea discoveries in Indonesia.
Harbour Energy's plan of development for Tuna was approved by the Indonesian government in December 2022. Subsequent progress, however, has been impacted by EU/UK sanctions which prevented the company from undertaking further work on the project while its Russian partner was on the license.
About the Author
Alex Procyk
Upstream Editor
Alex Procyk is Upstream Editor at Oil & Gas Journal. He has also served as a principal technical professional at Halliburton and as a completion engineer at ConocoPhillips. He holds a BS in chemistry (1987) from Kent State University and a PhD in chemistry (1992) from Carnegie Mellon University. He is a member of the Society of Petroleum Engineers (SPE).