Oil and gas resources are discovered, and discoveries are developed as fields if they are economically and technologically viable, and the oil and gas is produced and sold. This results in dynamic resource accounts that change from year to year. Resources is a general term for all oil and gas that can be recovered. Resources are classified according to maturity, which measures how far along they are in the planning process leading to production. The primary classifications are reserves, contingent resources and undiscovered resources. Read more about the resource classification system.
The Norwegian Offshore Directorate's resource accounts as per 31 Dec. 2025 show that the overall resource volume (including what has been sold and delivered) on the Norwegian shelf is about 15.72 Sm³ billion (GSm³) of oil equivalents (o.e.), which is an increase of 111 million Sm³ (MSm³) of o.e. compared with the previous year. The proven resources have increased by 131 MSm³ of o.e. compared with 2024.
Total recoverable petroleum resources on the Norwegian continental shelf as of 31.12.2025
Oil and condensate are listed in million standard cubic metres (Sm³). NGL is listed in million tonnes, and gas is listed in billion standard cubic metres. The conversion factor for NGL in tonnes to Sm³ is 1.9. Total oil equivalents are listed in million Sm³ o.e., 1000 Sm³ gas = 1 Sm³ o.e.
Source: Norwegian Offshore Directorate
Print table Download data Total recoverable petroleum resources on the Norwegian continental shelf as of 31.12.2025
57 per cent of the expected recoverable resources on the shelf have been produced, and 22 per cent of the overall resources have yet to be proven. Download all tables associated with the Resource accounts for the Norwegian shelf as per 31 Dec. 2025 and the report for this year's resource accounts from the Norwegian Offshore Directorate's website.
Petroleum resources and uncertainty in the estimates as per 31 Dec. 2025
The figure in each column shows the expected recoverable petroleum, while the slanted line shows the uncertainty in the estimates; low estimate on the left and high estimate on the right (Source: Norwegian Offshore Directorate)
In the Norwegian Offshore Directorate’s resource classification system, oil and gas resources transition into reserves once the operator has submitted a plan for development and operation (PDO) or decided to implement a measure optimising recovery that does not require a PDO. Discoveries are classified as fields once an approved plan for development is available. There are currently more than 100 fields in production, under development, or with plans for redevelopment.
The overall remaining reserves amount to 815 MSm³ of oil and 1219 GSm³ of gas. The Troll and Johan Sverdrup fields have the largest remaining reserves on the Norwegian shelf, with 559 billion Sm³ of gas and 193 million Sm³ of oil, respectively.
A total of 21 new discoveries were made in 2025. Eleven of the discoveries were made in the North Sea, five in the Norwegian Sea and five in the Barents Sea. At the end of 2025, the discovery portfolio consisted of 91 discoveries. Of these discoveries, the largest are 7324/8-1 (Wisting) in the Barents Sea, 6406/9-1 Linnorm in the Norwegian Sea and 35/2-1 (Peon) in the North Sea.
Contingent resources are proven petroleum for which a production decision has not yet been made. Petroleum volumes in potential improved recovery projects are included in this category. The growth in the contingent resources category comes from both new discoveries and from changed resource estimates and new opportunities in fields and discoveries. Decisions are made every year to develop some of the contingent resources. They are then transitioned over to the reserves category.
At year-end, the contingent liquid resources in fields amounted to 319 MSm³, a decrease of 39 MSm³ from the previous year. For gas, the expected volume is 263 GSm³, representing a decrease of 31 GSm³ compared with the previous year.
Contingent resources in discoveries amount to 280 MSm³ of liquid and 247 GSm³ of gas. The total volume for undeveloped discoveries has been reduced by 54 MSm3 of o.e. compared with last year's accounts. The increase is due to a combination of several factors. There was a high level of resource additions from exploration activity in 2025. In addition, several older discoveries have changed status. These discoveries were previously not included in contingent resources because development was considered unlikely, but they are now included in this category and therefore contribute to the increase in total resources.
Undiscovered resources are volumes of petroleum that we assume could be recovered from deposits not yet proven through drilling. The estimates for undiscovered resources in areas opened for petroleum activities are updated on an annual basis. The update is based on assessments taking into consideration the previous year's exploration results, new studies, as well as relevant information from the companies.
Undiscovered resources are estimated at 3.48 billion Sm3 of o.e., which is a decrease of 20 MSm3 of o.e. compared with the previous year. Unproven resources make up about 22 per cent of the overall remaining resources on the Norwegian continental shelf. For more detailed estimates and distribution of undiscovered resources in each sea area, see the article Resources per sea area.
