Oljedirektoratet

Continuing the near subsurface mapping for offshore wind

fugro-searcher

Fugro Searcher. Photo: Fugro

06/01/2023 The Norwegian Petroleum Directorate (NPD) has awarded contracts to the companies Fugro and Enviros for mapping of the shallowest strata under the seabed.

The objective is to locate sites that are best suited for placement of wind turbines.

Fugro has been awarded the contract for the Sørlig Nordsjø II area, while Enviros will map Utsira Nord. The respective vessels to be used are the Fugro Searcher and the Kommandor Iona.

The companies will acquire seven different measurements: "MBES (multibeam echosounder) delivers key data sets for bathymetry, acoustic backscatter and water column data. We will also collect 2D high-resolution seismic, sub-bottom profiler echo-sounder (SBP), side-scanning sonar (SSS) data, as well as magnetometer data," according to geophysicist Lars Jensen, who is managing the project for the NPD.

The NPD received the assignment last year to conduct subsurface surveys in the two areas, which have been opened for applications for renewable energy production. Fugro mapped parts of Sørlige Nordsjø II last autumn.

The 2023 fiscal budget includes targeted funding to complete the subsurface surveys in these two areas. According to the plan, this will take place from late April to early September.

Thousands of wells have been drilled on the Norwegian shelf, but the focus has not been aimed at the layers directly below the seabed. It is precisely these upper 100-200 metres that are of interest for the wind power companies:

"These are the layers where the wind turbines will be placed, and that’s why we need to know more about the geological and geotechnical properties here. Seabed conditions on the Norwegian shelf are complex and vary between different locations, which is why detailed examinations are needed," Jensen explains.

The geological challenges include shallow gas, large boulder blocks that fell to the seabed when the ice melted, channels, sinkholes, landslides and faults as well as soft and ‘weak’ deposits that extend down into the depth.

"A good factual basis is crucial for sound management of these resources, and this mapping project is an important step towards developing offshore wind on the Norwegian shelf," says Arne Jacobsen, Assistant director for Technology, analyses and coexistence.

"The NPD has many years of experience and extensive knowledge when it comes to operating and acquiring seismic data from the oil and gas industry. It’s positive that this experience can be used to help support the energy transition."

Fugro Searcher

Fugro Searcher. Photo: Fugro

 

Kommandor IonaKommandor Iona. Foto: Enviros

 

The areas Sørlig Nordsjøen II and Utsira Nord have been opened for applications for renewable energy production

The areas Sørlig Nordsjøen II and Utsira Nord have been opened for applications for renewable energy production. Map: NVE

 

Contact

Ola Anders Skauby

Director Communication, public affairs and emergency response

Tel: +47 905 98 519

Updated: 06/01/2023

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.