25/4-2 (Trine) is a discovery in the central North Sea, five kilometres east of the Heimdal field. The water depth is 120 metres. The discovery was proven in 1973. The reservoir contains oil in sandstone of Paleocene age in the Heimdal Formation, at a depth of 2,150 metres. Trine will be a joint development with the 25/5-9 (Trell) discovery as a subsea tie-back to the Alvheim field. The plan for development and operation (PDO) was submitted in August 2022.
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