Saudi East-West Pipeline Shutdown Puts 4% of Global Oil Supply at Risk

Saudi Arabia’s East-West oil pipeline could remain out of service far longer than stored crude can sustain normal exports from Yanbu. The pipeline was shut Friday after drone attacks, interrupting a route that had carried about 4 million barrels per day to the Red Sea roughly 4% of global oil supply.

The immediate tension is measured in days versus weeks. Reuters reported, citing three industry figures familiar with Saudi exports, that Yanbu held enough crude to maintain exports for only five to seven days. One repair estimate extended to five or six weeks, although another indicated that work might finish sooner and partial pumping could resume before repairs were complete.

That wide range prevents a firm forecast of how much oil will be lost. Saudi authorities had not disclosed full damage details or set a restart timetable, and the government media office and energy ministry did not immediately respond to requests for additional information. The outage therefore places up to 4 million daily barrels at risk rather than confirming that the entire volume will disappear for weeks.

Storage can bridge days, not replace the pipeline

Yanbu’s storage capacity is estimated at approximately 35 million barrels. At a pipeline flow of 4 million barrels per day, five to seven days of continued exports would consume roughly 20 million to 28 million barrels. Those figures are consistent with a large terminal operating below its nominal maximum: all four industry contacts said the relevant storage facilities were not full.

Additional Saudi crude held at Egypt’s Ain Sukhna and Sidi Kerir terminals could supply customers for several more days. Their estimated capacities are approximately 18 million and 20 million barrels, respectively. Capacity, however, is not the same as available Saudi inventory. The facilities also were reported to be below full levels, so adding their nameplate capacities would overstate the usable buffer.

This is the central logistics constraint. Storage can keep tankers loading after an upstream interruption, but every exported barrel reduces inventory unless new crude reaches the terminal. A pipeline moving 4 million barrels daily would carry 140 million barrels over five weeks and 168 million over six weeks. That throughput is more than the combined 73 million barrels of estimated capacity at Yanbu and the two Egyptian terminals and the actual stocks are lower than those capacity figures.

The comparison does not mean exports will fall by 140 million to 168 million barrels. Partial pipeline service, a faster repair, lower export rates or other adjustments could reduce the shortfall. It does show why a restart within days would have a very different global consequence from a full outage lasting several weeks.

A backup route was already carrying an unusually heavy burden

The East-West pipeline runs across the Arabian Peninsula, moving crude from Saudi Arabia’s eastern production region to Yanbu. It had become the kingdom’s principal way to bypass reduced tanker traffic through the Strait of Hormuz. Industry estimates placed recent Hormuz flows at 6 million to 9 million barrels per day, well below the route’s customary role in global energy trade.

The pipeline has capacity for as much as 7 million barrels per day, but it had recently been moving about 4 million. That distinction matters: the current risk is tied to observed throughput, not the higher theoretical capacity. Backup infrastructure provides resilience only while its pumps, storage terminals and onward shipping connections remain available.

The outage also arrives with Saudi production already sharply reduced. The kingdom reported to OPEC that output declined from 10.9 million barrels per day in February to 6.2 million in August. The International Energy Agency characterized August Saudi supply as the lowest in more than three decades and projected that worldwide oil supply would decline by 5.7 million barrels per day, or about 6%, during the year.

A prolonged interruption could consequently deepen an existing shortage and add pressure to fuel prices and inflation. The scale depends on how quickly substantial pipeline flow returns, how much crude is actually available in western storage and whether Egyptian inventories can extend deliveries. The most consequential next milestone is not a final repair date: it is whether partial pumping resumes before Yanbu’s reported five-to-seven-day buffer is exhausted.

By Stephen Wallace — Editor for AMI’s aerospace integration and unmanned mobility coverage, focused on drone manufacturing, VTOL systems, autonomous networks, and air-ground mobility links.