Oil and gas/condensate discovery near the Tyrihans field in the Norwegian Sea (6407/1-B-2 H)
Illustration picture.
12/22/2025 Equinor and its partners have discovered oil/condensate/gas in the "Tyrihans Øst" prospect, about 250 kilometres southwest of Brønnøysund.
Exploration well 6407/1-B-2 H is the first one drilled in production licence 1121, which was awarded in February 2021 (APA 2020).
The preliminary calculation of the size of the discovery is between 0.2 and 1.3 million standard cubic metres of recoverable oil equivalent. This corresponds to between 1 – 8 million barrels of recoverable oil equivalent.
The licensees will assess the discovery with a view toward a potential production well from the same location, with production over Tyrihans to the Kristin installation.
The well was drilled by the Transocean Encourage rig, which is leaving the location to drill a production well on Åsgard.
Geological information
The primary exploration target for the well was to prove petroleum in reservoir rocks in the Garn Formation (Fangst Group) in the Middle Jurassic. The secondary exploration target was to prove petroleum in reservoir rocks in the Ile Formation in the Middle Jurassic.
Well 6407/1-B-2-H encountered an approx. 6-metre condensate/light oil column in the Garn Formation in sandstone with poor to moderate reservoir properties. The well encountered an approx. 63-metre gas/condensate column in the Ile Formation in sandstone with poor to good reservoir properties.
The well was not formation-tested.
Well 6407/1-B-2 H was drilled to a measured depth of 4590 metres (4045 metres vertical depth) below sea level, and was terminated in the Ror Formation in the Middle Jurassic.
Water depth at the site is 275 metres. The well will now be temporarily plugged and abandoned.
Updated: 12/22/2025