Saudi Arabia’s Oil Corridors Are Being Squeezed From North and South

Key Takeaways

• Iran-backed militias in Iraq have opened a northern front against Saudi petroleum infrastructure.

• The Houthis are simultaneously threatening Saudi ports, pipelines and tankers from Yemen.

• The attack on the Saudi-flagged tanker Encelia showed that the campaign extends beyond land-based infrastructure into the Red Sea.

• Saudi Arabia’s alternative to the Strait of Hormuz now faces pressure along the entire route from its eastern oilfields to Yanbu and the Bab el-Mandeb.

  
  

Saudi Arabia’s Alternative Export Route Is Under Attack

Saudi Arabia’s oil-export system is being pressured from two directions. On 27 July, Saudi Arabia said it had intercepted drones targeting petroleum infrastructure, attributing them to Iran-backed armed groups operating from Iraq. This established a northern launch corridor from which Saudi oilfields, pumping stations and processing facilities can be threatened.

To the south, Yemen’s Houthis have attacked sites connected to Saudi Arabia’s East–West Pipeline, threatened the kingdom’s oil infrastructure and attempted to impose a blockade on Saudi maritime traffic through the Red Sea. These are not separate episodes. They form a coordinated pattern of pressure against the infrastructure connecting Saudi oilfields, pipelines, storage facilities, ports and international shipping routes. The immediate objective may not be to stop Saudi production completely. It may be to make every exported barrel more difficult, expensive and dangerous to move.

The East–West Pipeline Is No Longer a Safe Alternative

Saudi Arabia developed the East–West Pipeline, or Petroline, to reduce its dependence on the Strait of Hormuz. The approximately 1,200-kilometre pipeline moves crude from the Eastern Province across Saudi Arabia to the Red Sea port of Yanbu. It gives Riyadh an alternative export route when commercial shipping through Hormuz is disrupted.

That redundancy has become increasingly important as tanker movements through Hormuz have fallen sharply. Saudi Arabia has redirected greater volumes through Yanbu, increasing the strategic importance of the pipeline and the Red Sea. The problem is that the alternative route is now exposed at both ends.

Militias in Iraq can threaten facilities in Saudi Arabia’s north and east, including the infrastructure feeding the pipeline. The Houthis can target pumping stations, storage sites and ports along the western route. Tankers leaving Yanbu must then sail through waters exposed to Houthi missiles, drones and uncrewed surface vessels. Saudi Arabia is therefore defending an interconnected export corridor stretching from its oilfields to the Bab el-Mandeb.

The Tanker Attack Changed the Calculation

The attack on the Saudi-flagged tanker Encelia demonstrated how the threat can move from land-based infrastructure into the maritime domain. Saudi authorities said the vessel caught fire after being struck in the Red Sea. The Houthis claimed they had attacked the Encelia and Layla using missiles and drones. The strike on the Encelia was confirmed, while the claim involving the Layla remained unverified. Neither ship was a very large crude carrier. However, the attack directly affects the risk calculation surrounding the VLCCs required to move Saudi crude at scale. A VLCC can carry approximately two million barrels. Several continued moving through the Bab el-Mandeb after the Houthi blockade announcement, including the New Pearl, which was carrying two million barrels of Saudi crude to China. Their movement shows that the route remains open. It does not mean the route is secure.

Following the attacks, daily commodity-vessel traffic through the Bab el-Mandeb fell to its lowest level in months. Some vessels changed course, while owners and charterers reconsidered whether Saudi cargoes, ownership or port calls increased their targeting risk. Even unsuccessful attacks can therefore alter commercial behaviour.

Saudi Ports Are Now Part of the Battlespace

Yanbu and Jizan are not simply coastal cities. They are essential components of Saudi Arabia’s energy architecture. Yanbu connects the East–West Pipeline to international markets. Jizan contains refining, storage and port infrastructure close to Yemen. Attacks against either location place pressure on Saudi export capacity and force Riyadh to distribute air-defence assets across a vast area.

This is where the relationship between the Iraqi militias and the Houthis becomes strategically important. Attacks from Iraq can force Saudi Arabia to defend its Eastern Province, Riyadh and the pipeline’s northern infrastructure. At the same time, the Houthis can threaten Yanbu, Jizan and ships approaching the Bab el-Mandeb. Iran retains the ability to control or disrupt traffic through Hormuz.

No single strike must cause catastrophic damage. The campaign can impose cumulative costs through repeated interceptions, temporary shutdowns, delayed cargoes, altered routes and higher insurance premiums. Reports that Iran had asked the Houthis to prepare to close the Red Sea gateway reinforce the connection between pressure in Hormuz and attacks around the Bab el-Mandeb.

A Distributed Strategy of Economic Pressure

Iran’s regional partners do not have to operate as one conventional military force for their actions to support the same objective. Iraq-based militias provide access to Saudi Arabia’s northern and eastern approaches. The Houthis can threaten its western ports and southern maritime gateway. Iran can apply direct pressure around Hormuz while maintaining some distance from attacks conducted by allied groups.

This creates a distributed pressure system around Saudi Arabia’s oil-export network. The strategy also provides several levels of escalation: threats, drone launches, attacks on pumping stations, port disruption and strikes against individual ships. Pressure can be increased or reduced without requiring a formal regional ceasefire. The objective is leverage. By making Saudi exports less predictable, Iran and its partners can influence oil prices, shipping decisions and the political calculations of countries dependent on Gulf energy.

Business Considerations

Saudi exports remain operational, but companies should not measure the risk only through lost production. Shipowners and charterers must review vessel ownership, port-call histories, cargo origins and public affiliations that could affect Houthi targeting. Voyage plans should account for sudden diversions, port congestion, security delays and possible rerouting around the Cape of Good Hope, an option already used by major carriers during earlier regional escalation. Energy and logistics companies should also anticipate higher war-risk premiums and greater scrutiny from insurers, lenders and counterparties. Oil prices may fall during diplomatic pauses while the operational risk of moving the oil remains elevated.

The Bottom Line

Saudi Arabia developed the East–West Pipeline and its Red Sea ports to prevent Hormuz from becoming a single point of failure. The current conflict is turning the alternative route into a contested corridor. Iraq-based militias can threaten the northern and eastern parts of the Saudi energy system. The Houthis can target Red Sea infrastructure and tankers from the south. Iran can continue applying pressure through Hormuz. The central question is no longer whether Saudi Arabia can produce oil. It is how many facilities, ports and vessels must be defended to keep that oil moving, and how long global markets will accept the rising cost.