Harbour Energy has completed drilling at the Tolmount East project ahead of the expected start of first gas production later this year. The company drilled the well using the Noble Innovator jackup rig and plans to use the OSV North Sea Atlantic for the installation of subsea infrastructure from September 24 for approximately two weeks.

Tolmount East is a planned tie-back to the main Tolmount field, which Harbour Energy brought online in 2022. The project aims to achieve first gas before the end of 2023, despite the initial forecast of a 2024 start date. It targets approximately 53 million barrels of oil equivalent (boe) in gas and condensates from an area about two miles east of the main field, in water depths of around 50 meters.

Production from Tolmount East is expected to peak in 2024 at approximately 2,520 (1,000 m³ per day) of gas, gradually declining over the expected field life. Total condensate production is also predicted to peak in 2024 at 68 tonnes per day, followed by a steady decline.

Harbour Energy's Tolmount gas field is located in Block 42/28d in the UK southern North Sea and was discovered in 2011. The company also has plans for the Talbot project, a multi-well tie-back to its Judy platform, with an expected startup around the end of 2024, and is appraising the Leverett gas discovery for a potential tie-back to the Britannia hub.