Oljedirektoratet

Delineation of discovery in the North Sea (35/10-12 S)

coslpromoter

The well was drilled by the COSLPromoter exploration rig. (Photo: Wellesley Petroleum)

10/07/2024 Wellesley Petroleum has proven oil and gas in the Gnomoria Appraisal (35/10-12 S) well in the North Sea, about 100 kilometres southwest of Florø.

This is the first appraisal well to be drilled in production licence 1184 S, which was awarded in APA 2022. The well was drilled by the COSLPromoter exploration rig. Preliminary estimations of the size of the discovery range between 0.8 to 4 million standard cubic metres of recoverable oil equivalent (Sm3 o.e.). This corresponds to between 5 to 25 million barrels o.e.

Gnomoria is located in an area with multiple discoveries. The licensees are considering a tie-back to existing infrastructure in the area.

Geological information

The objective of the well was to prove petroleum in Upper Jurassic sandstones in the Heather Formation. The well was drilled upflank where reservoir quality was considered to be better for delineation of the Gnomoria discovery from 2018.

Well 35/10-12 S encountered an 11-metre gas column and an 18-metre oil column in the Heather Formation, in a sandstone layer totalling 21 metres with poor to moderate reservoir quality. The gas/oil contact was encountered 3239 metres below sea level. The oil/water contact was not encountered.

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

Well 35/10-12 S was drilled to a vertical depth of 3346 metres below sea level (3805 metres measured depth below sea level), and was terminated in the Heather Formation in the Upper Jurassic.

Water depth at the site is 363 metres. The well has been permanently plugged and abandoned.

Map showing location of well 35/10-12 S

 

Contact

Ola Anders Skauby

Director Communication, public affairs and emergency response

Tel: +47 905 98 519

Updated: 10/07/2024

Latest news

Join us for an exploration seminar
16/07/2024 We look forward to welcoming you to a seminar on the topic of exploration in the Barents Sea, to be held on 23-24 October 2024 at our offices in Stavanger. The seminar will include presentations by the Ministry of Energy, the Norwegian Offshore Directorate, licensees and suppliers.
Drilling permit for wellbore 6610/7-3
11/07/2024 The Norwegian Offshore Directorate has granted Equinor Energy AS drilling permit for wellbore 6610/7-3 in production licence 1014, cf. Section 13 of the Resource Management Regulations.
Delineation of discovery in the North Sea (35/10-12 S)
10/07/2024 Wellesley Petroleum has proven oil and gas in the Gnomoria Appraisal (35/10-12 S) well in the North Sea, about 100 kilometres southwest of Florø.
Drilling permit for wellbore 35/6-5 S
04/07/2024 The Norwegian Offshore Directorate has granted Aker BP ASA drilling permit for wellbore 35/6-5 S in production licence 1110, cf. Section 13 of the Resource Management Regulations.
Drilling permit for wellbore 31/1-4
03/07/2024 The Norwegian Offshore Directorate has granted Equinor Energy AS drilling permit for wellbore 31/1-4 in production licence 923 B, cf. Section 13 of the Resource Management Regulations.
The Norwegian shelf is continuously developing
28/06/2024 Director General Torgeir Stordal shares his thoughts on the trends in activity on the Norwegian Continental Shelf (NCS) in the first half of 2024.
Gas discovery in the Barents Sea (7324/8-4)
28/06/2024 Aker BP and its partners have discovered gas in wildcat well 7324/8-4 (Hassel) in the Barents Sea, around 300 kilometres from the northern coast of Norway.
Found oil and gas in the North Sea (36/7-5 S, A, B and C)
27/06/2024 Vår Energi has made an oil and gas discovery in well 36/7-5 S “Cerisa” and sidetracks 36/7-5 A, B and C.
Nominated blocks for announcement on public consultation
26/06/2024 In connection with the first licensing round for mineral activities on the seabed, the Ministry of Energy has sent blocks nominated for announcement on a public consultation process.
Drilling permit for wellbore 34/10-A-48 E
26/06/2024 The Norwegian Offshore Directorate has granted Equinor Energy AS drilling permit for wellbore 34/10-A-48 E in production licence 050, cf. Section 13 of the Resource Management Regulations.