Equinor and Aker BP have identified hydrocarbons at the Lofn and Langemann prospects in the Sleipner area in the Norwegian North Sea.
The exploration wells, 15/5-8 S (Lofn) and 15/5-8 A (Langemann), were drilled using the Deepsea Atlantic rig at a water depth of 107m.
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These wells were drilled in production licence PL1140, operated by Equinor with a 60% working interest, with Aker BP holding the remaining 40%.
According to preliminary estimates, the Lofn prospect holds between 3.5 and ten million standard cubic metres (mscm) of recoverable oil equivalent, or 22–63 million barrels of oil equivalent (mboe).
The Langemann prospect is estimated to contain 1–8mscm, or 6–50mboe.
Equinor said these discoveries represent its largest finds in the region for the year to date, and reduce uncertainty in several nearby prospects.
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By GlobalDataEquinor Norway exploration and production executive vice-president Kjetil Hove said: “This demonstrates the importance of maintaining exploration activity on the Norwegian Continental Shelf.
“There are still significant energy resources on the shelf, and Europe needs stable oil and gas deliveries.
“Discoveries near existing fields can be developed quickly through subsea facilities, with limited environmental impact, very low CO₂ emissions from production and strong profitability.”
Both wells encountered gas and condensate in the Hugin Formation, which consists of sandstone layers.
The 15/5-8 S (Lofn) well found gas and condensate-bearing sandstones with a thickness of 116m, with 36m of moderate-to-very good reservoir quality.
It also intersected a 173m interval in the Skagerrak formation, although the reservoir was aquiferous.
The 15/5-8 A (Langemann) well encountered 125m of gas and condensate-bearing sandstones in the Hugin formation, with 31m of moderate-to-good reservoir quality.
It also met a 95m interval in the Skagerrak formation with very poor reservoir quality. Neither well was formation-tested, but extensive data and samples were collected.
Both wells have now been permanently plugged and abandoned, according to Aker BP’s press release.
The Deepsea Atlantic rig will now move to the Sissel prospect for Equinor and partner ORLEN Upstream Norway.
Equinor and Aker BP will assess potential development options for the discoveries using existing infrastructure in the area.
Aker BP CEO Karl Johnny Hersvik said: “The Lofn and Langemann discovery marks the conclusion of a strong exploration year for Aker BP.
“Across three major discoveries, we have added more than 100 million barrels net to the company, including Omega Alfa and Kjøttkake earlier this year.
“These results are key to sustaining production above 500,000 barrels per day into the 2030s. The progress achieved this year reinforces our confidence in delivering on that trajectory,” he added.
Equinor recently started production from the Verdande subsea oilfield, tying it back to the Norne floating production, storage and offloading vessel.
