Find out how long Portugal’s oil reserves can last in the event of war

Jazigo de petróleo. Crédito: Foto AI

A crisis in the Middle East may seem distant, but just touch the oil for the impact to quickly reach Portugal. When the price of crude oil soars or global supplies are threatened, there is a mechanism designed to avoid disruptions and stop immediate shocks in the market, according to the international news agency: strategic oil reserves.

That’s exactly what happened again. The 32 countries of the International Energy Agency (IEA) decided to move forward with the largest coordinated release of all time, with 400 million barrels, and Portugal follows this movement. According to , Luís Montenegro announced that the country should make around 10% of national strategic reserves available to help increase supply and contain pressure on fuels.

What are these reserves, after all?

Strategic reserves are not oil saved for normal sale to the market. These are emergency stocks, created to respond to serious supply shortages and to give governments room to react when there are wars, blockades or other international disturbances.

In the European case, the rule is clear: Member States must maintain minimum reserves equivalent to at least 90 days of net imports or 61 days of consumption, whichever is greater. In Portugal, the National Entity for the Energy Sector (ENSE) directly guarantees 30 days of these security reserves, while obliged operators guarantee the remaining 60 days.

Interest for the Portuguese

What interests most those who supply fuel in Portugal is simple: these reserves serve to prevent an international crisis from transforming, from one day to the next, into a physical shortage of fuel or an even more sudden rise in prices. They do not eliminate the problem, but they act as a cushion in a moment of tension.

The current international response emerged after the conflict in the Middle East caused severe disruptions in the oil market, with particular impact following the closure of the Strait of Hormuz. The IEA itself and its director, Fatih Birol, have already said that the release of these reserves is having an effect on energy markets, precisely because it helps to signal that there is oil available to respond to the crisis.

Oil reserves in Portugal

For Portuguese consumers, this does not mean cheap fuel from one day to the next, nor automatic braking during peak periods. The objective is more pragmatic: to reduce immediate pressure on prices, protect companies and families from an even greater shock and give the market time to reorganize.

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