Harbour Energy plc said first gas at the HGS Tolmount platform would be delayed due to issues in certain offshore electrical systems during final commissioning and testing.
The company added it was investigating the issues and developing rectification plans for the gas platform in the Southern North Sea.
“As a result, Tolmount first gas will be delayed beyond the end of July and is now likely to be around year-end,” said the company in a statement.
With expected plateau rates of 20-25 kboepd net to Harbour, Tolmount was expected to contribute just over 10 kboepd to Harbour’s 2021 production.
Harbour’s revised production guidance for the year excludes volumes from the project and is now 185 to 195 kboepd on a proforma basis and 170 to 180 kboepd on a reported basis.
The revised guidance also reflects actual proforma production to the end of June of 180 kboepd and a delayed restart of Elgin Franklin following the summer maintenance shutdown.
Forecast full year operating costs of US$15-16/boe and total capex of US$1.1bn are unchanged.