Dvalin North is an offshore gas field and part of the larger Dvalin field, which hosts the Dvalin East and West fields.
The plan for development and operation for the gas field was submitted to the Norwegian Ministry of Petroleum and Energy in December 2022 and approved in 2023.
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The partners in the field are Harbour Energy (55%, operator), Petoro (35%) and DNO (10%). Wintershall Dea operated the field until June 2023, when Harbour Energy acquired Wintershall Dea’s exploration and production business.
Gas production from the field commenced in July 2026, ahead of schedule and under budget.
Location
The Dvalin North gas field is located in production licence 211, 200km offshore the northern part of Norway in the Norwegian Sea, at a water depth of 420m (1,378ft).
The field lies 12km to the north of the Dvalin gas field and approximately 65km north of the Maria field.
Dvalin North gas field reserves
The Dvalin North gas field was originally estimated to have between 33 million and 70 million barrels of oil equivalent (mboe) when discovered in 2021. Hydrocarbons were later discovered in two deeper secondary targets with an aggregate resource estimate of 38–87mboe.
The field is currently estimated to hold around 84mboe of reserves.
Discovery and exploration details
The Dvalin North prospect was discovered in the Haltenbanken area by the 6507/4-2 S wildcat well, which was drilled in May 2021. It was the largest discovery on the Norwegian shelf in 2021.
The well was drilled by the Deepsea Aberdeen, a sixth-generation semi-submersible rig built to operate in harsh environments at water depths of 3,000m, with a drilling depth of 10,670m. The well discovered a gas column of 85m in the Garn formation.
Further exploration led to the discovery of gas, condensate and oil columns of 33m and 114m, respectively, in the Cretaceous Lysing and Lange formations.
Dvalin North gas field development details
Dvalin North is a three-well subsea tieback to the Heidrun platform, operated by Equinor through the existing Dvalin gas field, making use of the existing infrastructure.
The subsea production system for the project includes three horizontal subsea trees and control systems, as well as a four-slot subsea template and manifold system, in addition to 10km of static subsea umbilicals.
Gas produced from the project is transported through the Polarled pipeline to the Nyhamna processing plant near Kristiansund for further export to the European market.
Contractors involved
Odfjell Drilling was contracted to provide the Deepsea Aberdeen drilling rig to drill the exploration wells at the field in September 2020.
Transocean, an offshore contract drilling service provider, was awarded a contract for its Transocean Norge semi-submersible rig in September 2022 to drill three wells for the Dvalin North field.
Sustainable energy solutions provider Aker Solutions was awarded a contract to supply the subsea production system, including subsea trees and control systems, and perform installation work for the project in December 2022. The subsea templates were delivered by SLB Onesubsea.
TechnipFMC, a provider of oil and gas technologies, won the contract to provide engineering, procurement, construction and installation services for the subsea pipeline connecting the field to the Heidrun platform in January 2023.
