The blockade is working — and China’s oil problem could become Australia’s fuel problem

For much of the Iran war, the international oil market has demonstrated an extraordinary ability to adapt.

When one supply route disappeared, another emerged.

When tankers stopped sailing normally through the Strait of Hormuz, oil moved through alternative ports, pipelines and ship-to-ship transfers.

When Asian refiners lost Middle Eastern crude, they looked to Russia, the United States, West Africa and elsewhere.

The result has been remarkable.

The global energy system has bent without breaking.

But there is now evidence that one of the most important pressure points is becoming substantially tighter.

The United States blockade of Iranian oil exports appears to be working.

Iranian crude available to Chinese buyers for September and October delivery has fallen sharply, according to traders and analysts cited by Reuters.

China's estimated imports of Iranian oil have fallen to about 534,000 barrels a day in August, compared with an average of approximately 1.4 million barrels a day last year.

That is not merely an Iranian problem.

China has to replace those barrels.

And when the world's largest crude importer starts looking urgently for replacement oil, it changes the market for everybody else.

Including Australia.

China cannot simply stop refining oil

China has been Iran's overwhelmingly important petroleum customer.

It has also been able to purchase Iranian crude at attractive discounts because sanctions made the oil difficult to sell elsewhere.

That relationship suited both sides.

Iran obtained revenue.

Chinese independent refiners obtained discounted feedstock.

The US blockade is disrupting that arrangement.

Available Iranian floating stocks are being depleted, September and October offers have fallen and some Iranian grades are reportedly being offered at premiums rather than their traditional discounts.

That last point is particularly revealing.

A sanctioned product that traditionally needed a discount to attract buyers has become sufficiently scarce that sellers can seek a premium.

The economics have reversed.

China's refiners still need barrels

A refinery cannot process a geopolitical argument.

It needs crude oil.

So Chinese refiners are looking elsewhere.

Reuters reports independent Chinese refiners are examining alternatives including Brazil's Lapa crude and Iraq's Basrah grades.

China has also increased purchases of Russian crude.

That is precisely how markets respond to shortages.

But there is an unavoidable consequence.

The replacement barrel China buys was potentially available to somebody else.

That somebody else may be India

We have already seen this mechanism developing.

China's increasing demand for Russian crude is colliding with India's own dependence on Russian supplies.

India became one of the largest purchasers of Russian oil following Western sanctions after Russia's invasion of Ukraine.

Those discounted barrels helped feed India's enormous refining industry.

Now China wants more of them.

The Iran crisis has therefore produced an extraordinary energy domino effect:

Iran loses exports.

China loses Iranian crude.

China searches for replacement oil.

Russia supplies more to China.

India faces greater competition for Russian crude.

Indian refinery feedstock becomes tighter.

Asian refined-fuel supply becomes more vulnerable.

And eventually:

Australia competes for petrol, diesel and aviation fuel in that same regional market.

Australia is at the end of the chain

This is why a blockade of Iranian ports matters to Australians.

Australia does not need to buy Iranian crude directly.

The transmission mechanism is much more complicated.

Australia depends heavily upon imported refined petroleum products.

Asian refineries manufacture much of the petrol, diesel and aviation fuel available to our region.

Those refineries require crude.

If crude becomes harder or more expensive for Asian refiners to obtain, the consequences can eventually appear in the price of the finished fuel.

Australia imports that price.

Hormuz itself remains severely impaired

The physical shipping situation provides little reassurance.

Only seven commodity vessels were recorded crossing the Strait of Hormuz on Thursday, according to Kpler data reported by Reuters.

Four entered and three exited.

Significantly, there were no very large crude carriers and no LNG tankers among those observed transits.

Some ships may be travelling without their normal tracking systems transmitting, so public vessel data cannot provide a complete picture.

Nevertheless, commercially visible traffic remains extraordinarily depressed.

Before the conflict, approximately one-fifth of global crude oil and LNG shipments moved through Hormuz.

The waterway remains a long way from normal.

The blockade adds another restriction

That means there are now two different constraints operating simultaneously.

The first is the disruption of ordinary international shipping through Hormuz.

The second is the US attempt to prevent Iran itself from exporting oil.

Those are related but distinct problems.

Alternative shipping routes can help Gulf producers work around Hormuz.

They do not necessarily help Iran evade a blockade specifically designed to prevent its exports reaching customers.

That distinction is now becoming important.

Iranian oil in storage provided a buffer

For a period, China could continue receiving Iranian oil from cargoes already at sea or held in floating storage.

That provided a cushion.

But buffers eventually run down.

Reuters reports the availability of Iranian floating stocks has declined substantially.

That means the market increasingly depends upon new Iranian barrels escaping the blockade.

If they cannot, China's replacement requirement grows.

The longer the blockade operates effectively, the greater the potential displacement elsewhere in the international crude market.

Oil prices are responding

Brent crude was around US$93.28 a barrel on Friday, with both Brent and US West Texas Intermediate heading towards a second consecutive weekly gain.

Despite Friday's modest decline, both benchmarks had gained more than 4.8 per cent during the week as tensions between Washington and Tehran intensified.

The market is therefore sending two messages simultaneously.

Oil remains available.

But the geopolitical risk associated with obtaining it is increasing again.

For Australia, neither message should be ignored.

Washington is preparing another escalation

The blockade may not be the end of American economic pressure.

US Treasury Secretary Scott Bessent says Washington intends to impose what he describes as the toughest sanctions yet against Iran, with further details expected on Monday.

The United States is also urging China to cooperate.

China, which remains Iran's principal oil customer, opposes unilateral sanctions and continues advocating diplomacy.

That creates another potential fault line.

The Iran conflict could increasingly become an economic confrontation involving the United States and China.

For Australia, that would broaden the consequences considerably beyond petroleum.

China matters enormously to Australia

Australia's economic relationship with China is very different from its strategic relationship with the United States.

China is a critical customer for Australian exports.

Iron ore.

LNG.

Agricultural products.

Education.

Tourism.

Other commodities and services.

The United States, meanwhile, is Australia's principal strategic ally.

If Washington's campaign against Iran increasingly requires economic pressure on Chinese companies involved in Iranian trade, Australia has an obvious interest in avoiding a wider deterioration in US-China commercial relations.

An energy war can become a trade problem remarkably quickly.

There is a paradox in China's position

China wants stable energy markets.

It is the world's largest crude importer.

Expensive oil damages Chinese businesses and consumers.

China therefore has a strong economic interest in restoring reliable Middle Eastern supply.

But it also opposes American sanctions on Iran.

Washington believes that gives Beijing leverage.

Beijing rejects the premise.

That disagreement matters because China has been the economic outlet allowing Iran to continue monetising much of its oil.

Restrict that outlet and pressure on Tehran increases.

But so does pressure on China's replacement supply.

Iraq may benefit

One country's shortage can become another country's opportunity.

Chinese refiners looking for alternatives to Iranian crude are considering Iraqi grades.

That potentially increases demand for Iraqi oil precisely as Iraq develops additional mechanisms for getting crude to international customers despite Hormuz disruption.

The global petroleum market is continuously rearranging itself.

Iran loses a sale.

Iraq gains a customer.

A tanker changes route.

A refinery changes feedstock.

The market keeps functioning.

But every rearrangement can alter price.

Brazil can benefit too

Brazilian crude provides another alternative.

That demonstrates the truly global nature of the adjustment.

A military and maritime crisis in the Persian Gulf can increase demand for oil produced off South America.

But geography matters.

Transporting crude over greater distances requires tankers for longer periods.

It consumes more bunker fuel.

It increases freight exposure.

It can increase working-capital requirements.

The replacement barrel may exist.

That does not mean it arrives at the same cost.

And tankers are already expensive

This is where our recent coverage connects.

Tanker availability has itself become increasingly valuable.

Longer voyages consume shipping capacity.

Dangerous routes attract higher premiums.

Alternative oil supplies frequently have to travel much further than the Middle Eastern crude they replace.

The world can therefore solve an oil shortage and create a shipping shortage while doing it.

That is one reason crude price alone no longer describes Australia's fuel exposure adequately.

The refinery remains the critical link

Even if China successfully replaces every lost Iranian barrel, another problem remains.

The world is short of refinery output.

Middle Eastern refining capacity has been damaged or disrupted during the conflict.

Russian refining has also suffered disruption.

Diesel markets have consequently become exceptionally tight.

Australia does not put Brazilian, Iraqi, Iranian or Russian crude directly into a truck.

Somebody has to refine it first.

That is why the availability of finished petroleum products remains so important.

Australia's diesel exposure is particularly serious

Diesel keeps much of the physical Australian economy functioning.

Road freight.

Agriculture.

Mining.

Construction.

Regional transport.

Commercial fleets.

Generators.

Heavy machinery.

If international diesel prices remain elevated, the economic consequence spreads well beyond motorists driving diesel vehicles.

The truck delivering food pays more.

The farmer pays more.

The miner pays more.

The builder pays more.

Eventually some of those businesses attempt to recover their costs.

That is how energy inflation travels.

Petrol is more visible

Petrol creates the immediate political problem.

Australians see the price every time they drive past a service station.

A further increase in crude and refined-product prices can therefore quickly affect household confidence and disposable income.

A family spending more filling its vehicles has less available for restaurants, entertainment, retail and other discretionary purchases.

Fuel inflation can consequently weaken other parts of the economy even before it becomes embedded in the price of goods.

Aviation remains exposed

Australia's aviation sector belongs in the same discussion.

Jet fuel is another refined petroleum product.

International and domestic aviation cannot rapidly substitute electricity for liquid fuel.

Australia's geography makes aviation unusually important.

Tourism depends upon it.

Regional communities depend upon it.

Business depends upon it.

Air freight depends upon it.

If competition for Asian refinery output intensifies, aviation remains part of Australia's fuel-security exposure.

The Australian Government has recognised the vulnerability

The Iran war has already prompted Australia to reconsider its fuel-security arrangements.

Greater strategic reserves, additional diesel and aviation-fuel holdings, support for domestic refining and examination of alternative liquid fuels are all manifestations of the same underlying problem.

Australia cannot control Hormuz.

It cannot control US-Iran relations.

It cannot control China's crude purchases.

It cannot control Russian exports.

But it can determine how vulnerable Australia is when those things go wrong.

That is the purpose of resilience.

There is an important distinction between shortage and price

Australia remains a wealthy economy with considerable purchasing power.

That makes a catastrophic physical fuel shortage less likely than headlines might sometimes suggest.

At a sufficiently high price, sellers have strong incentives to supply Australian customers.

But that creates a different problem.

Availability does not mean affordability.

The fuel can arrive.

The trucks can keep moving.

Aircraft can continue flying.

Service stations can remain open.

And Australians can still suffer a substantial economic loss because they have to pay considerably more for the energy required to make all of that happen.

The blockade therefore matters even if no Australian tanker is involved

This is the key point.

It is easy to regard the US blockade of Iranian exports as something geographically and politically remote from Australia.

Economically, it is not.

Removing Iranian barrels from China forces China into other markets.

China's enormous purchasing power changes those markets.

Other buyers respond.

Shipping changes.

Crude premiums change.

Refinery economics change.

Finished-fuel markets change.

Australia ultimately encounters the consequences downstream.

The connection is indirect.

But indirect does not mean insignificant.

What happens next matters

There are several indicators worth watching.

Does Iranian crude continue escaping the blockade?

Do Chinese Iranian imports fall further in September?

How aggressively does China pursue Russian oil?

Can India replace the Russian barrels it loses?

Do Indian refinery runs begin declining?

Does China increase exports of finished petroleum products?

Do Middle Eastern refineries recover?

Does visible traffic through Hormuz begin increasing?

And what exactly will Washington's new sanctions target?

The answers will determine whether this remains a manageable redistribution of oil or becomes another major tightening of Asian fuel supply.

Monday could be important

Washington says further details of its new Iran sanctions will be announced on Monday.

That deserves close attention.

If the measures primarily target Iranian entities, the market response may be limited.

If they aggressively target foreign buyers, banks, traders or shipping companies facilitating Iranian petroleum sales, the consequences could be considerably larger.

China would then become central to the next phase of the crisis.

That could turn an Iranian oil blockade into a much broader geopolitical and economic confrontation.

The Times View

The US blockade appears to be achieving something sanctions alone struggled to accomplish.

Iranian oil reaching China is becoming harder to obtain.

China's estimated Iranian crude imports have fallen from an average of around 1.4 million barrels a day last year to about 534,000 barrels a day this month. Available September and October cargoes have declined, and floating stocks are being depleted.

That puts pressure on Iran.

But energy markets do not operate in isolation.

China still needs oil.

So it buys somewhere else.

Russia.

Iraq.

Brazil.

Potentially anyone capable of providing the appropriate crude at an acceptable price.

That solves China's problem.

But it increases competition for everyone else.

We are already seeing the consequences in India, where competition for Russian crude threatens another major Asian refining system.

Australia sits further down that chain.

We depend heavily upon Asian markets for the finished petrol, diesel and aviation fuel that keeps this country operating.

That is why the success of the US blockade has two meanings.

Strategically, it increases pressure on Iran.

Economically, it forces the world's largest crude importer to compete more aggressively for replacement oil.

The blockade may be working.

But if China's scramble for replacement crude tightens Asian refinery supply and keeps finished-fuel prices elevated, part of its cost can eventually arrive in Australia.

Not as an Iranian barrel.

Not as an American sanction.

But as a higher fuel bill.

And once again, that fuel bill can travel through freight, farming, mining, aviation and ultimately inflation.

The blockade is thousands of kilometres away. The economic chain connecting it to Australia is much shorter.