Saudi Arabia’s oil price slides amid pipeline plans, Hormuz diplomacy

Brent crude dropped roughly 2.6% to around $103.05 on September 21, touching two-week lows at or below the $100 mark. The catalyst: Saudi Arabia proved it could keep oil flowing even after drone strikes knocked out its main cross-country pipeline, and diplomatic channels around the Strait of Hormuz started looking less like a powder keg and more like a functioning trade route.

What happened to the pipeline

On September 10-11, drone attacks forced the precautionary shutdown of Saudi Arabia’s East-West pipeline, known as the Petroline. The 1,200-kilometer artery had been moving between 4 and 5 million barrels per day to the Red Sea port of Yanbu, giving Saudi Aramco a crucial export route that bypassed the Strait of Hormuz entirely.

Loadings from Persian Gulf terminals, particularly Ras Tanura and Juaymah, ramped up to approximately 4 million barrels per day. Ship-to-ship transfers in the Gulf of Oman jumped from about 1.5 million bpd in August to roughly 2.7 million bpd. US naval escorts supporting tanker movements through Hormuz helped contain insurance premiums and security concerns.

The bigger supply picture

Saudi crude exports had already taken a historic hit earlier in 2026, plummeting over 70% from peaks above 7.5 million bpd to roughly 2.1 to 2.3 million bpd. When Saudi Arabia demonstrated it could surge Gulf port loadings and maintain export volumes even without the Petroline, traders recalculated. Brent stabilized near or below the $100 level by September 21-22, a notable retreat from the triple-digit premiums that had defined much of the year.

Negotiations around the Strait of Hormuz, which handles roughly one-fifth of global oil consumption on any given day, appeared to be making progress, cooling the geopolitical risk premium that had been propping up crude prices.

Pipeline expansion on the horizon

Saudi authorities are now in discussions to expand the East-West pipeline’s capacity by up to 2 million bpd. The existing Petroline already spans the full width of the Arabian Peninsula, and adding 2 million bpd of throughput capacity would require years of construction and billions in capital expenditure.

What traders and investors should watch

The speed at which ship-to-ship transfers nearly doubled, from 1.5 million bpd to 2.7 million bpd, suggests Saudi Aramco had contingency plans ready. However, routing more crude through the Strait of Hormuz concentrates export flows in a narrow geographic corridor that proved vulnerable to disruption since conflict involving Iran began in February 2026.

A 2 million bpd capacity addition to the East-West pipeline would fundamentally alter Saudi Arabia’s export risk profile, potentially reducing the geopolitical premium embedded in crude prices. Until that expansion moves from concept to commitment, the current reliance on Hormuz transits and naval escorts remains the operative supply framework.