It’s not because these oil and gas fields are under military threat (though some of them may be). The problem is the effective closure of the Strait of Hormuz because of the war in Iran. The tightening of that chokepoint gives many of the Gulf energy producers few export outlets for their barrels. That sets off a chain reaction—with domestic storage filling up and then forcing the shuttering of production.

That shuttering, in turn, could create long-term trouble. Oil and gas wells don’t operate like light switches. The shutdown process can trigger equipment failures and geological breakdowns and, even in best-case scenarios, it can take several weeks to resume the full flows of hydrocarbons.

The “silent killer” of global energy isn’t just the war; it’s the irreversible physical decay that happens the moment oil production stops, explained Sid Misra, petroleum engineering professor at Texas A&M University. The oil can be trapped in the subsurface as returning water rushes to fill the pore space.

“This oil is not just paused; it is physically locked away from ever being produced through the wellbore,” Misra stated. “Even when the conflict ends, that production capacity may be gone forever, permanently reducing global supply and raising the long-term floor price of energy.”

The good news for global oil markets is that Middle Eastern nations in OPEC are more adept at adjusting production flows than anywhere else in the world, said Pavel Molchanov, energy analyst at Raymond James.

“In the Middle East, there’s a long history of oilfields modulating production up and down. It’s just that normally it happens for a different reason,” Molchanov told Fortune. “It will differ from field to field, but it’s days or weeks [to return production]. It’s not months.”

Insurance from Uncle Sam

In the background, the U.S. is working to resolve another issue that has spooked the energy markets: insurance prices on regional oil shipments, which have soared since the Iran conflict broke out. The U.S. government is preparing to offer subsidized insurance with third parties to cover the treks of oil tankers and more, while preparing potential naval escorts for the tankers at a to-be-determined time.

The U.S. International Development Finance Corporation (DFC) said March 6 it will initially focus on offering cargo, hull and machinery coverage for maritime reinsurance, including war risk, in the Persian Gulf region. The emphasis is on working with preferred American insurance partners. DFC said it is coordinating with the U.S. Treasury and U.S. Central Command on the “next steps in the implementation of this plan.”

“Working alongside CENTCOM, DFC coverage will offer a level of security no other policy can provide. We are confident that our reinsurance plan will get oil, gasoline, LNG, jet fuel, and fertilizer through the Strait of Hormuz and flowing again to the world,” said DFC CEO Ben Black in a statement.

In the meantime, the U.S. oil benchmark had spiked above $90 per barrel as of Friday—up almost 60% since the beginning of the year, and nearing its highest levels since Russia invaded Ukraine in 2022. Fuel prices worldwide, including gasoline, diesel, and jet fuel, are surging by the day. The U.S. average for a gallon of regular unleaded gasoline is up more than 60 cents from January lows and rising. The effects are even more dramatic on Asian and European economies that are more heavily dependent on OPEC oil and Qatari natural gas.

While Iran’s Revolutionary Guard maintains it has “complete control” over the Strait of Hormuz, oil prices further spiked March 6 when President Donald Trump demanded nothing less than “unconditional surrender” from Iran.

“Iran has no advantage, and the United States Military is ensuring that their dismal situation only gets worse,” White House spokeswoman Anna Kelly told Fortune in a statement. “Their navy is totally demolished, and their ballistic missiles and production facilities are being destroyed. As President Trump said, he has ordered DFC to provide political risk insurance and guarantees for financial security of all maritime trade, and our Navy will begin escorting tankers through the Strait of Hormuz if necessary.”

Pursuing all options

The top oil exporter in the world, Saudi Arabia, began sending more crude oil shipments through the Red Sea, but those are modest volumes that cannot begin to be offset by the traffic through the Strait of Hormuz.

An S&P Global Ratings report noted that 89% of Saudi Arabia’s energy exports flow through the Strait of Hormuz. Iran, Kuwait, and Qatar ship 100% through the strait, while Iraq exports 97% through it. The UAE has a bit more flexibility, shipping only 66% through the strait because of alternatives utilizing Abu Dhabi pipelines.

On March 5, an Iranian drone targeted an oil tanker near the Iraqi port of Khor al Zubair, and another tanker reported an explosion while anchored off Kuwait. While large energy infrastructure has been targeted relatively seldomly, an Iranian missile strike also hit the only oil refinery in Bahrain, and Saudi Arabia’s largest refinery remains closed for now after sustaining reportedly modest damage.

The worst-case scenario is if Iran places explosive mines throughout the strait, which would take months to remove, or if Iran and its Gulf neighbors begin broadly targeting each other’s energy-producing infrastructure, Molchanov said.

“They need to have an economy after the war ends. It would be a lose-lose for both sides,” Molchanov said. “But repairing a pipeline that’s been destroyed, or a refinery or an export terminal can take months, potentially over a year depending on how much damage.”

The positive backstop, he said, is the U.S. and most major countries have emergency stockpiles of oil to tide them over in the meantime, if necessary. In contrast, during the Arab oil embargo in the 1970s led to long lines of cars at gas pumps that remain vivid memories for many.

There is more risk of a natural gas shortage in some of the Asian and European economies that depend on Qatari gas, Molchanov said, because most of those countries don’t have extensive natural gas reserves.

Kathleen Brooks, research director for the XTB brokerage house, reiterated that energy prices should remain elevated even when and if military deescalation takes hold.

“We think that energy prices will maintain a risk premium even if the fighting stops, as oil and gas infrastructure in the Gulf remains out of action, which could take weeks or months to repair,” Brooks said in a note. “If the war continues to escalate over the weekend, we think that markets will continue to sell off, especially after the rapid increase in oil prices today.”