If Trump Strikes Iran: Mapping the Oil Disruption Scenarios

If Trump Strikes Iran: Mapping the Oil Disruption Scenarios

Photo: Kaveh Kazemi/Getty Images

What Disruptions Could Look Like

There are four oil supply disruption scenarios worth considering, and an observation about a Gulf liquefied natural gas export outage scenario.

Scenario 1: U.S. or Israel Disrupts Iranian Crude Oil Shipments

This could take the form of blockading or seizing Kharg Island, the principal facility for loading Iranian oil onto ships, and seizing oil tanker vessels transporting Iranian crude.

This could disrupt up to 1.6 mb/d of Iranian crude oil exports, all of which go to China. However, since oil is a global, fungible commodity, a disruption anywhere affects prices everywhere. A loss of Iranian barrels would cause China to bid for substitute supplies, probably worth at least a $10-⁠12 increase in the global price of crude oil. This scenario is reversible, meaning that the United States or Israel could call off its campaign against Iranian shipments at any time with no permanent damage having been incurred and export volumes rebounding thereafter, like what was seen following the U.S. quarantine on Venezuelan oil shipments. Insurance and war-risk premiums could keep prices elevated longer than any physical supply interruption.

Scenario 2: Iran Disrupts Arab Gulf Oil Shipping

This campaign would likely target Gulf export flows transiting the Strait of Hormuz, in which the inbound and outbound shipping lanes are only two miles wide. Iran could attempt to divert or seize control of oil tankers, or strike them outright using fast attack craft, drones, anti-ship missiles, or naval mines. Up to 18 million barrels per day (mb/d)-perhaps far less-of non-Iranian crude oil and refined petroleum products could be throttled or temporarily halted.

This scenario could see several mb/d disrupted for a period of weeks until allied naval forces are able to neutralize sea- and shore-based threats to energy cargo flows. Oil prices would initially spike with surging freight and insurance rates, and with some ship operators likely fleeing the region, further diminishing export capacity. As traders assess the volume and duration of a physical disruption, crude prices could climb past $90 per barrel, pushing U.S. retail gasoline prices well above $3 per gallon on a national average basis (some regions higher). Like Scenario 1, this chain of events is reversible; Tehran could call off its disruptive activities at any time, or global forces could quell their attempts at interruption, enabling Gulf export volumes to rebound.

Scenario 3: U.S. or Israel Directly Attacks Iranian Oil Facilities

In this scenario, air and naval forces would strike Kharg Island and its supply lines, offshore production platforms, and (less likely) Iran's oil refineries. Iran's export terminal at Kharg Island accounts for nearly all of its 1.6 mb/d average export volume. Kharg could be taken offline in several ways, including disabling or destroying its ship loading equipment (hoses, pumps, and connecting hardware), damaging its oil storage tanks, or cutting off the flow of oil that reaches Kharg via subsea pipelines. Choke points for oil deliveries to Kharg include the onshore Ghurreh booster station, the manifold station at Ganaveh, and the pipelines themselves.

Not only are Iran's 1.6 mb/d crude oil exports (if limited to Kharg) at stake, but also its additional 1.5 mb/d of domestic oil production (should platforms/fields be targeted) and its domestic supply of transportation fuels like gasoline (if refineries are damaged). The oil price effects would likely be greater than the $10-12 per barrel spike anticipated with Scenario 1 for two reasons: (1) damage to or destruction of Iranian infrastructure could keep barrels off the market for a protracted period of time (potentially offset by activation of OPEC spare production capacity), and (2) anticipation of a further escalation by Iran with something like Scenario 4 (described below). This track, therefore, could take oil prices above $100 per barrel.

Scenario 4: Iran Directly Attacks Arab Gulf Oil Facilities

This outcome could include producing fields, gathering and processing nodes, or oil export terminals. In this scenario, a substantial portion of the 18 mb/d non-Iranian oil exports from the Gulf, depending on which assets might be taken offline and for how long, would be at stake. Potentially millions more barrels per day in the affected countries' domestic crude feedstocks and refined product supply would also be at risk.

This scenario could lead to a historic oil price spike, potentially higher than the $130 per barrel that was touched in 2022 following Russia's invasion of Ukraine. The oil supply at risk at that time was approximately 5 mb/d,

Like Scenario 3, this case could see oil facilities heavily damaged or even destroyed, removing export capacity for a protracted period. This is true not only for onshore infrastructure, but especially for offshore loading platforms, which constitute a critical bottleneck in export capacity.

One example of this vulnerability is that Iraq's entire Gulf export flow of 3.5 mb/d relies on offshore loading facilities very close to Iranian territorial waters. These offshore loading points can take considerable time to repair-a November 29 Ukrainian strike on a similar offshore loading platform at the Black Sea's Caspian Pipeline Consortium terminal knocked 500 thousand barrels per day (kb/d)-a third of the terminal's output-offline for months.

Onshore facilities are also vulnerable but can be repaired faster, depending on the repair resources available. For example, the September 2019 attack on Saudi Aramco's Abqaiq crude oil processing facility initially disrupted about 5 mb/d, but most of that volume was restored in less than two weeks following rapid repair efforts.

Flows of liquefied natural gas (LNG) through the Strait of Hormuz to world markets could also be interrupted during a new conflagration.

Qatar's shipments of more than 10 billion cubic feet per day could be reduced or cut off by naval mines or direct attack on gas tanker vessels, or by disabling its export terminal at the Port of Ras Laffan. This could increase electric power prices as far away as the United States, complicating policymakers' efforts to promote affordability for U.S. consumers.

Hormuz Bypass Potential Is Limited

As described in the CSIS June 23, 2025, piece "How War with Iran Could Disrupt Energy Exports at the Strait of Hormuz," export routes that bypass the Strait can handle only a fraction of daily Gulf exports. Saudi Aramco's East-West Pipeline connects the kingdom's oil production centers in the Eastern Province with the Red Sea Yanbu Commercial Port. The pipeline could reroute some barrels from the Gulf to the Red Sea, but only in reduced volumes. The pipeline is believed to have a capacity of 5 mb/d. But it is already supplying Yanbu with close to 800 kb/d for export cargoes, and likely supplying six Saudi Aramco refineries in central and western Saudi Arabia with about 1.8 mb/d. That would leave only about 2.4 mb/d of spare capacity in the pipeline, compared to Saudi Arabia's typical 6 mb/d from its Gulf terminals-enabling the rerouting of less than half of its Gulf exports.

The United Arab Emirates (UAE) can reroute about half of its 2 mb/d of Gulf exports via pipeline to its port of Fujairah on the Gulf of Oman, bypassing the Strait of Hormuz. Fujairah already accounts for about one-third of the UAE's total 3.2 mb/d export volume, implying that the remaining third (1 mb/d) would remain stranded in a Hormuz closure.

Other Gulf oil-exporting countries-Iraq, Kuwait, Bahrain, Qatar (5.7 mb/d total volume)-have no Hormuz bypass capacity; likewise, there's no other outlet for Qatar's 10 billion cubic feet per day of LNG exports.

How the Scenarios Might Unfold

President Trump faces a dilemma in how to confront Iran without incurring an unwanted oil supply disruption and gasoline price spike. In Operation Midnight Hammer and in the operation to capture Nicholas Maduro, Trump selected military options with low risk of negative consequences (e.g., U.S. casualties, energy price increases). But Scenarios 2 and 4 afford Tehran leverage that could deter Trump from undertaking a major military operation against Iran. Meanwhile, Israel, which launched the Twelve-Day War against Iran last summer, remains a wildcard.

Washington certainly has a large list of Iranian targets for kinetic action, many of which may not involve energy. Insofar as oil leverage may be used as part of a pressure campaign against Tehran, it is likely to start with Scenario 1 (U.S./Israel disrupts Iranian crude oil shipments), and Iran will face a dilemma about how to respond. If Iran pursues Scenario 2 (Iran disrupts Arab Gulf oil shipping), the United States will seek to neutralize Iran's naval and shore-based anti-ship capabilities, leaving Tehran with only Scenario 4 (Iran directly attacks Arab Gulf oil facilities) left to employ-one that could cause the United States to implement Scenario 3 (U.S./Israel directly attack Iranian oil facilities)-and seek the regime's outright defeat or destruction. Iran's "use it or lose it" dilemma could provoke a miscalculation in Tehran, resorting to Scenario 4-direct attacks on Arab Gulf oil facilities-as its last card to play to stave off defeat.

Clayton Seigle is senior fellow and James R. Schlesinger Chair in Energy and Geopolitics at the Center for Strategic and International Studies in Washington, D.C.

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