New development concept on Oseberg

15/06/2016 When Oseberg Vestflanken 2 starts producing in 2018, it will represent a new concept on the Norwegian shelf. Unmanned wellhead platforms may be relevant for future developments.

The Plan for Development and Operation (PDO) for Vestflanken 2, nine km from the Oseberg field centre in the northern part of the North Sea, was approved by the Ministry of Petroleum and Energy this Tuesday. Vestflanken 2 is the first of three planned phases for development of the remaining reserves in the Oseberg area. This project will help extend the life of the Oseberg field, which has been in production since 1988.

The PDO was submitted in December last year

The development solution chosen for Oseberg Vestflanken 2 is an unmanned wellhead facility resting on the seabed. This platform will have no process equipment, living quarters, drilling facilities or helicopter deck. The wells on the field will be drilled with a mobile drilling unit, while maintenance will be performed with a support vessel with adapted gangway drawing up alongside the platform.

This concept is new on the Norwegian shelf, but common on the Danish and Dutch shelves.

The operator Statoil and partners Petoro, Total and ConocoPhillips have estimated the development cost at NOK 8.2 billion (2015). This investment will enable the production of 17.6 million standard cubic metres of oil equivalents (around 110 million bbls o.e). Of the reserves, the oil makes up nearly 10 million cubic metres (62 million barrels), while the gas reserves amount to 7.8 billion Sm3. The reservoirs are located between 2400 and 3100 metres below the sea surface.

The wellhead facility has ten well slots. To increase the recovery of oil, two of the slots will be used to inject gas. In addition, two production wells will be drilled from an existing subsea template on the Vestflanken. Further injection will take place by bringing in gas through a new pipeline from the gas injection system which already exists in this area. The wells on Vestflanken 2 will be controlled from the Oseberg field centre, where the oil and gas will also be processed.

 

Relevant

 

Illustration: Statoil

Oseberg Vestflanken 2 will be developed with a simplified, unmanned wellhead facility with ten well slots. The licensees have booked a dedicated, simplified, jack-up drilling facility (Cat J rig) to drill the wells.
(Illustration: Statoil)

Updated: 15/06/2016

Latest news

Oil and gas discovery northeast of the Skarv field in the Norwegian Sea – 6507/3-15
12/08/2022 Aker BP ASA, operator of production licence 941, has concluded the drilling of wildcat well 6507/3-15.
NPD to present new resource report
04/08/2022 On Thursday, 25 August, Kjersti Dahle Grov, Director of Technology, Analysis and Coexistence, will present the Resource Report 2022.
Drilling permit for well 6507/8-11 S
03/08/2022 The Norwegian Petroleum Directorate (NPD) has granted Equinor Energy AS drilling permit for well 6507/8-11 S, cf. Section 13 of the Resource Management Regulations.
Dry well near the Brage field in the North Sea – 31/4-A-13 C
29/07/2022 Wintershall Dea Norge AS, operator of production licence 055, has concluded the drilling of wildcat well 31/4-A-13 C.
High level of activity on the Norwegian shelf in the first half of 2022
20/07/2022 50 years after the Storting (parliament) decided to establish the Norwegian Petroleum Directorate (NPD), there is still plenty of activity on the Norwegian shelf.
Production figures June 2022
20/07/2022 Preliminary production figures for June 2022 show an average daily production of 1 529 000 barrels of oil, NGL and condensate.
Drilling permit for well 31/1-3 S and 31/1-3 A
20/07/2022 The Norwegian Petroleum Directorate (NPD) has granted Equinor Energy AS drilling permit for well 31/1-3 S and 31/1-3 A, cf. Section 13 of the Resource Management Regulations.
Gas discovery near the Skarv field in the Norwegian Sea – 6507/2-6
13/07/2022 Aker BP ASA, operator of production licence 261, has concluded the drilling of wildcat well 6507/2-6.
Dry well near the Fenja field in the Norwegian Sea – 6306/3-2
11/07/2022 ConocoPhillips Skandinavia AS, operator of production licence 935, has concluded the drilling of wildcat well 6306/3-2.
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.