25/8-4 (D-struktur) is a discovery in the central part of the North Sea, eight kilometres northeast of the Grane field. The water depth is 130 metres. The discovery was proven in 1992 and subsequently delineated by well 25/8-18 S in 2014. The reservoir contains oil in sandstone of Paleocene age in the Heimdal Formation. It lies at a depth of 1,750 metres and has excellent properties. Development solutions with subsea templates tied-back to the Grane field are being evaluated.
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