Our East Irish Sea assets consist of the sweet gas Millom and Dalton fields and the sour gas Rivers fields along with the onshore Rivers terminal.

Rivers fields – 100.0%

Operated on our behalf by Spirit Energy

The Rivers fields comprise Calder, Darwen, Crossans and Asland. The only field in production is Calder in Block 110/7a, which was developed via a minimum facilities platform with three wells. The other Rivers fields may be tied back to Calder contingent on an economic development plan. Gas is exported from Calder via a dedicated 49-kilometre, 24-inch pipeline to the Rivers terminal at Barrow-in-Furness

Rivers terminal – 100.0%

Operated on our behalf by Spirit Energy

The Rivers terminal receives wet sour gas (gas containing inert nitrogen and hydrogen sulphide (H2S)), separates the liquids, compresses the gas to export pressure, sweetens it by removing the H2S, then forwards it to the North Morecambe terminal for further processing. Within the Rivers terminal is an acid plant, which converts the H2S and mercaptans (compounds containing both sulphur and hydrocarbon) removed from the gas to sulphuric acid and the removed liquids are sweetened before being forwarded to North Morecambe terminal.

Millom and Dalton – 100.0%

Operated on our behalf by Hydrocarbon Resources Limited

Millom extends over Blocks 110/2c, 113/6a and 113/27a. It is an unmanned wellhead platform and subsea template controlled from the North Morecambe terminal. Discovered in 1982, first production was in 1999. Dalton in Block 110/2b is a subsea template which is also controlled from the North Morecambe terminal. It was discovered in 1991 with first production in 1999. Sweet natural gas from Millom and Dalton are exported through the North Morecambe platform to the North Morecambe terminal.

Aerial view of acid plant at the Rivers Terminal
Calder platform
North Morecambe platform
Rivers terminal plant