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Norwegian state-controlled Equinor has confirmed that a power outage has forced it to shut down production from Johan Sverdrup, the North Sea's largest oil field, as well as other oil and gas fields in the area.
"We have experienced an incident involving smoke development in a control room connected to one of the converter stations at Haugsneset near Karsto," the company said. "This station supplies power to Johan Sverdrup and other fields on the Utsira High. The incident has resulted in a temporary shutdown of production."
Equinor said it is working to restore power supply to the fields. According to its website, the affected power line also supplies the Gina Krog, Ivar Aasen, Edvard Grieg and Gudrun fields. Edvard Grieg and Ivar Aasen feed into the medium sour Grane crude blend.
It is the second time in a week that Johan Sverdrup has been disrupted by a power outage. The field was shut down briefly on 4 February because of power supply issues onshore. Power was restored the same day, and the field had been ramping back up up to full operations on 5 February. At the time, Equinor did not expect any delays to loadings.
Johan Sverdrup produces the largest stream of middle distillate-rich crude in Europe, with a plateau capacity of 755,000 b/d. The field averaged around 712,000 b/d in 2024. Its output was around plateau levels in March, April and July last year, but Equinor expects capacity to drop early this year.
The grade was valued at a $1.65/bl premium to benchmark North Sea Dated on 10 February, a seven-month high, supported by a perceived global tightness in the supply of medium grades. The US tightened sanctions on the Russian fleet last month, which pushed refiners in Asia-Pacific to look for alternative, unsanctioned grades.
Grane is the second-largest medium sour stream in the region, with around 180,000 b/d exported last year, according to loading programmes. Official production data show Ivar Aasen contributed around 18,000 b/d to the Grane stream last year and Edvard Grieg accounted for 38,000 b/d. Grane prices surged to a $2.50/bl premium to Dated in recent assessments, up from a $1/bl discount in early January.
