The outages have in recent days led to growing concern that French and regional supplies of fuels, in particular diesel, could tighten in the coming weeks. Reuters GraphicsThe profit margin for refining crude oil into diesel has jumped by nearly 40% over the past month. The Ekofisk North Sea crude grade, produced at a field in Norway where TotalEnergies has equity, relies on France for two-thirds of its export stream, Rauball said. Meanwhile, prices for crude grades from Nigeria, one of France's top suppliers, have dropped by around $1/bbl in the past two weeks, traders said. "It's a buyer's market, with WTI and Azeri crude offered way down to sell," a trader of West African crude said.

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