Europe confronts looming energy risk as key oil exporters enter irreversible decline
The EU's long-term energy security is threatened by the steady drop in output from major oil-exporting nations.
The European Union has lessened its reliance on Russian oil, yet it imported roughly 435 million tonnes of crude in 2025, valued at over €212 billion. A less-discussed threat is the terminal decline of oil production in many exporting nations, where output enters an irreversible downward trend after peaking. Countries that supply a notable share of EU oil—Azerbaijan (4.1 %), Nigeria (5.8 %), Algeria (3.7 %) and Mexico (2.2 %)—are already seeing output fall from mature fields.
As more exporters hit similar stages, the EU’s capacity to diversify will shrink, raising long-term security concerns. The analysis urges the bloc to embed terminal decline monitoring into its energy strategy, expand partnerships based on sustainable export capacity, and intensify investment in electrification, renewables and efficiency. Recognising and planning for this slow-moving supply squeeze is presented as essential for Europe’s future energy resilience.
Why it matters
A gradual drop in oil from key suppliers could undermine Europe’s ability to secure affordable energy in the coming decades.
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