Sanctioned Iranian LPG Tanker Reaches China, U.S. Crude Blockade Holds

A sanctioned Iranian tanker successfully delivered a cargo of liquefied petroleum gas (LPG) to China after evading a U.S. naval blockade, according to a report from United Against Nuclear Iran (UANI) cited by OilPrice.com. The incident highlights persistent, though limited, challenges in enforcing total sanctions but comes alongside data showing the blockade remains fully effective against Iranian crude oil exports.

The vessel, the SOGL, carried approximately 500,000 barrels of Iranian LPG, loading at Assaluyeh Port in late August and transiting past the blockade on September 1. According to UANI, which says it filmed the ship, it delivered its cargo to Xinzhou Port in China after a stop in Malaysia. The U.S. Treasury Department sanctioned the SOGL on October 8, identifying it as part of a "shadow fleet" that has transported over two million barrels of Iranian propane and butane since September 2025.

Despite this breach, the broader enforcement effort against Iranian energy exports is described as effective, particularly for crude oil. UANI's October 29 shipping update states that "since July 12," it has not tracked a single tanker laden with Iranian crude that left the Gulf of Oman and avoided U.S. enforcement. The group's September monitoring also observed no crude oil loadings at Iranian export hubs, with loadings limited to small volumes of products like LPG, naphtha, and fuel oil.

UANI senior analyst Jemima Shelley explained the tactics used for product shipments, telling Fox News that small tankers switch off tracking systems, fly false flags, and conduct ship-to-ship transfers to attempt blockade runs. She noted that enforcing against these LPG shipments is riskier, leading U.S. forces to typically try to turn them around rather than use force. Since the blockade was reinstated in July, UANI estimates "only around nine small tankers carrying Iranian LPG have successfully passed the blockade line."

For Bakken operators and North Dakota royalty owners, the sustained effectiveness of the blockade on Iranian crude is a critical factor supporting the global oil market. By preventing a major source of supply from reaching the market, the U.S. enforcement action helps tighten global balances, providing a firmer price floor for domestic producers. While the successful transit of occasional product shipments demonstrates the difficulty of a perfect seal, the continued halt of Iran's roughly 1-1.5 million barrels per day of crude exports remains a more significant driver for the price of West Texas Intermediate, to which Bakken crude is closely linked.

The U.S. Treasury Department framed its sanctions as "starving the tyrannical regime in Tehran of the money it uses to wage war in the region," according to a statement from Treasury Secretary Scott Bessent. Market analysts watch such enforcement closely, as any material weakening of the blockade that allows Iranian crude to return could introduce new downward pressure on prices, directly impacting revenues in the Williston Basin.