Proved suitable properties for CO2 injection and storage (9/6-1)

Well 9/6-1 was drilled in the North Sea around 30 kilometres southeast of the Yme platform and around 120 kilometres southwest of Farsund – the DeepSea Nordkapp rig was used in the drilling operation.

Well 9/6-1 is the first well drilled in exploration licence (EXL 006), which was awarded in May 2023. This is the fourth well drilled to investigate potential commercial storage of CO2 on the Norwegian continental shelf (NCS). 

Geological information

The objective of well 9/6-1 was to investigate whether Middle Jurassic and Middle and Upper Triassic reservoir rocks in the Havstjerne project are suitable as a storage site for CO2. 

Well 9/6-1 encountered:

• The Tau Formation (caprock), 115 metres of homogeneous shale 
• The Egersund Formation (caprock), 58 metres of sealing shale and dense siltstone 
• The Sandnes Formation (reservoir), 97 metres of sandstone, good reservoir quality 
• The Bryne Formation (reservoir), 52 metres of sandstone, moderate reservoir quality
• The Skagerrak Formation (reservoir), 200 meters of sand- and siltstone of very poor reservoir quality

The well was drilled to a vertical depth of 3366 metres below sea level and was terminated in the Skagerrak Formation in the Upper Triassic. Water depth at the site is 90 metres.

Formation pressure data indicates that the rocks in the Sandnes and Bryne formations are located in a regional hydrostatic pressure gradient for this area. 

Extensive volumes of data have been acquired from the reservoir and caprocks. An injection test has also been conducted. Preliminary results are positive. 

The data will now be subject to further analysis, and the results will become part of the basis for future decisions regarding investment in the Havstjerne storage project. 

The well has been permanently plugged and abandoned.