The shift is a sign of the blockade’s widening impact. Iran loaded no new crude or condensate onto tankers in September, although previously exported Iranian oil continued arriving in China, according to Homayoun Falakshahi, Head of Crude Oil Analysis at Kpler.
Of nearly 90 million barrels that initially made it out, only around 10 million remain to be discharged in China, Falakshahi said.
Once those barrels and the payments for them are exhausted, Iran risks losing not only a crucial export market but one of its main sources of dollars.
Chinese refiners that once absorbed more than one million barrels per day of Iranian crude are now buying Iraq’s Basrah Heavy and Basrah Medium as they search for replacement supplies.
Iran loses a crucial outlet
China’s independent refiners have long provided Tehran with a critical market for oil sold under US sanctions, drawn in part by steep discounts on Iranian barrels.
Iran loaded an average of around 250,000 barrels per day of crude and condensate in August, Falakshahi said. In September, that fell to zero.
“I think that’s the first since the revolution, actually, 1979 revolution,” he said, describing the impact of the blockade as “very much brutal.”
The turn toward Iraq shows what is happening as Iranian supply disappears: buyers that relied heavily on Tehran’s crude are finding replacement barrels elsewhere.
The financial squeeze comes next
The full financial impact of the blockade has yet to reach Tehran.
Chinese buyers typically have one to two months to pay for Iranian crude, Falakshahi said, meaning payments for oil already exported could continue until around mid-December.
“After that, it’s zero revenue from oil sales,” he said, assuming the blockade remains in place.
Oil sales are Iran’s main source of foreign exchange, and despite sanctions, Falakshahi said the country is still paid mainly in dollars for its crude.
In recent years, Iran had typically generated around $2 billion to $3 billion per month from oil sales, he said. The prospect of losing those inflows is already weighing on Iran’s currency.
“The revenues have not yet dropped to zero,” Falakshahi said. “It’s just the expectation that they will drop to zero in December that is causing that.”
Once the remaining payments end, the pressure will “probably ... only accelerate,” he added.
Can Iran find another way out?
Iran has spent years developing methods to circumvent US sanctions, leaving open the possibility that some crude could still reach China through less transparent channels.
Max Meizlish, senior research analyst at the Foundation for Defense of Democracies and a former US Treasury official, said the increase in Chinese purchases of Iraqi crude could be entirely legitimate, but cautioned against assuming that reported origin always establishes where the oil was produced.
Iraq has previously been used to obscure the origin of Iranian crude, he said.
“Iraqi crude has been used as a vehicle for Iran to mask the source of its crude,” Meizlish told Iran International.
“It’s entirely possible that this is a legitimate ordinary increase by China of Iraqi crude,” he added, while saying data on the source of Chinese imports should be viewed “with a little bit of skepticism or with a critical eye.”
Even if Iran does move crude through Iraq, the larger constraint is scale.
Falakshahi said transporting 50,000 to 100,000 barrels per day through Iraq could require around 5,000 trucks. At 100,000 barrels per day, Iran would be replacing only around 5% to 7% of what it previously sold by tanker.
“It would be just a portion of that,” he said.
Iran’s own response also points to the difficulty of replacing those exports.
Falakshahi said Tehran has rapidly reduced oil production toward the level needed to meet domestic demand, while 20 to 25 empty tankers remain inside the blockade zone despite being available to load crude.
During an earlier blockade, Iran continued loading tankers in apparent anticipation that restrictions would eventually ease. This time, the vessels are remaining empty.
Kpler also understands that tankers beginning to move inside the blockade zone have received radio warnings from the US Navy against continuing, Falakshahi said.
“This is something that did not happen during the first blockade,” he said.
Iran may still find ways to move smaller volumes or disguise the origin of some crude. What those workarounds have not demonstrated is an ability to replace the tanker trade being lost.
The buyers are still there. So is their demand for oil. But increasingly, the barrels they are buying are coming from somewhere else.
And as the remaining Iranian oil already at sea dwindles, the impact of the blockade is shifting from Iran’s export terminals to its finances.