Iran can only hold out 13 days without oil exports, wells face irreversible damage

Iran: 13 days without oil exports and the wells suffer irreversible damage

Iran has onshore storage for about 13 days of exports at the current rate of 1.5 million barrels per day. But the real problem is not storage: if production stops, the wells can suffer irreversible damage from the phenomenon known as water coning. While Western powers amass aircraft carriers in the Middle East, Iran's window of maneuver is shrinking to less than two weeks.

The storage arithmetic

According to data from the industry itself, Iran has a total onshore oil storage capacity of between 50 and 55 million barrels, currently at 60% of capacity. That leaves about 20 million barrels in reserve. With daily exports of 1.5 million barrels, the margin is roughly 13 days before the tanks are completely full. Some sources cut that deadline to 72 hours if the actual capacity of the loading tanks is taken into account, but the consensus is that time is running out for Tehran.

Water coning: the real threat

Beyond storage, the geological risk is the critical factor. Oil wells usually have a layer of water beneath the crude. When production accelerates or pressure drops, the water rises, forming a cone that eventually floods the well. Once the water cut exceeds a threshold, extraction is no longer profitable and the well can be lost forever. Halting production abruptly, as would happen if the export tap were closed, would hasten that pressure drop. The result would be irreversible damage to many fields.

The geopolitical game

Iran has spent 45 years under sanctions and has shown an ability to endure, but this time the squeeze is military. Three carrier groups and arms shipments to the region indicate the pressure will not let up. While some argue Iran could circumvent the blockade by exporting through the Caspian Sea with Russian help, others point out that the necessary infrastructure is not ready. What is clear is that the Gulf countries, dependent on desalinated water and their own oil production, would also be in a critical situation if the Houthis attack their facilities.

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The question nobody answers is who will blink first: Iran, whose wells suffer with every day that exports are halted, or the US-led coalition, which plays with the advantage of holding larger strategic reserves. What seems certain is that time is running out, and not for everyone at the same pace.

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