2/4-23 S

23/07/2015 Statoil Petroleum AS, operator of production licence 146, is in the process of concluding the drilling of wildcat well 2/4-23 S.

The well was drilled about 17 kilometres northeast of the Ekofisk field, near the 2/4-21 (King Lear) discovery in the southern part of the North Sea.

The primary exploration target for the well was to prove petroleum in Upper Jurassic reservoir rocks (the Ula formation) and Middle Jurassic reservoir rocks (the Bryne formation), as well as to delineate the 2/4-21 discovery (King Lear), which was proven in Upper Jurassic reservoir rocks (the Farsund formation) in the summer of 2012. Before well 2/4-23 S was drilled, the operator's resource estimate for King Lear was between 11 and 32 million standard cubic metres of recoverable oil equivalents.

The secondary exploration target for 2/4-23 S was to prove petroleum in Upper Triassic reservoir rocks (the Skagerrak formation).

In the primary exploration target, the well encountered 41 metres of gas/condensate-filled sandstone rocks in the Ula formation, with moderate reservoir quality. The petroleum/water contact was not encountered. Preliminary estimates place the size of the discovery at between 2.5 and 12 million Sm3 of recoverable oil equivalents.

The well also encountered 30 gross metres of water-filled sandstone with poor reservoir quality in the Bryne formation.

In addition, the well encountered a 20-metre thick gas/condensate column in the Farsund formation, in two zones of five metre thick reservoir rocks with moderate/good reservoir quality, which confirmed pressure communication with the 2/4-21 King Lear discovery. Delineation of the 2/4-21 discovery will not lead to any change in the resource estimates.

The Skagerrak formation had poor reservoir quality and was water-filled.

The well was not formation-tested, but extensive data acquisition and sampling have been carried out.

The licensees will assess the discoveries together, with a view toward an optimal development.

This is the fourteenth exploration well in production licence 146, which was awarded in the 12th licensing round.

Well 2/4-23 S was drilled to a vertical depth of 5548 metres below the sea surface, and was terminated in sandstone in the Skagerrak formation in the Upper Triassic.

Water depth at the site is 68 metres. The well will now be permanently plugged and abandoned.

Well 2/4-23 S was drilled by the Mærsk Gallant, which will now proceed to PL 018 to do well work on the Eldfisk field in the North Sea.

Contact in the NPD

Bjørn Rasen, tel. +47 51 87 61 00

Map - Download pdf

Updated: 11/02/2016

Latest news

Temporary appointment - Director General
04/07/2022 The Ministry of Petroleum and Energy has announced a temporary appointment, naming Torgeir Stordal (60) as Director General of the NPD from 30 June and until a new Director General of the NPD is hired.
Drilling permit for well 30/5-4 S
04/07/2022 The Norwegian Petroleum Directorate (NPD) has granted OMV (Norge) AS drilling permit for well 30/5-4 S, cf. Section 13 of the Resource Management Regulations.
Drilling permit for well 35/6-3 S
04/07/2022 The Norwegian Petroleum Directorate (NPD) has granted Neptune Energy Norge AS drilling permit for well 35/6-3 S, cf. Section 13 of the Resource Management Regulations.
Preparing Nova for start-up
30/06/2022 The authorities have granted consent to start production from the Nova field in the North Sea.
Drilling permit for well 25/7-10
28/06/2022 The Norwegian Petroleum Directorate (NPD) has granted ConocoPhillips Skandinavia AS drilling permit for well 25/7-10, cf. Section 13 of the Resource Management Regulations.
Drilling permit for well 6607/12-5
27/06/2022 The Norwegian Petroleum Directorate (NPD) has granted Equinor Energy AS drilling permit for well 6607/12-5, cf. Section 13 of the Resource Management Regulations.
Prestigious UN post for Harald Brekke
23/06/2022 Senior geologist Harald Brekke has been elected to the Commission on the Limits of the Continental Shelf (CLCS).
Production figures May 2022
21/06/2022 Preliminary production figures for May 2022 show an average daily production of 1 831 000 barrels of oil, NGL and condensate.
Dry well near the Kvitebjørn field in the North Sea – 34/9-1 S
21/06/2022 Equinor Energy AS, operator of production licence 1049, has concluded the drilling of wildcat well 34/9-1.
Ingrid Sølvberg resigns as Director General
17/06/2022 Sølvberg has today, Friday 17 June, resigned from her position as Director General for the Norwegian Petroleum Directorate.