Iran Oil Backs Up at Sea as Chinese Refiners Shift to Gulf Rivals

Iran’s sanctioned crude is piling up aboard tankers at sea, with volumes rising as China’s independent refiners — the so-called teapots that have been the primary buyers sustaining Tehran’s oil revenues — pivot toward competing Middle East supplies, traders told Reuters on Thursday.

The development marks a notable shift in the market for heavily discounted Iranian crude, which has depended almost entirely on Chinese buyers to bypass U.S. sanctions since the Trump administration’s maximum-pressure campaign locked out Western and most Asian importers.

Teapots Pivot Away

China’s independent refiners have long been Iran’s buyer of last resort, purchasing oil at steep discounts and routing payments through channels designed to avoid U.S. secondary sanctions. That arrangement kept Iranian export revenues flowing even as official Western commerce with Tehran collapsed.

But traders told Reuters that the teapot refiners are now redirecting purchases toward rival Middle East suppliers. The result is Iranian crude accumulating in floating storage — tankers that cannot offload cargo because buyers are not stepping forward at current prices or on current terms.

Floating storage buildups are a recognized signal of a supply-demand mismatch: sellers hold barrels offshore when buyers are scarce or when negotiations over price and payment terms stall. For Iran, where China accounts for the near-totality of oil export revenue, even a temporary withdrawal of teapot demand creates real fiscal pressure.

UAE Output Adds Competitive Supply

Contributing to the competitive pressure on Iranian crude is a record surge in UAE oil production. Middle East Eye reported Thursday that the Gulf state has ramped output to a record high since its departure from OPEC lifted the cartel’s production quotas.

The UAE’s expanded production adds legitimate, sanction-free Middle East crude to the market — supply that China’s teapot refiners can source without the legal exposure, payment complexity, and logistical friction that Iranian barrels require. Middle East Eye noted that the surge also reflects how Abu Dhabi has structured its export capacity to reduce dependence on Iranian-controlled transit points in the Strait of Hormuz.

The combination of increased Gulf supply and a Chinese buyer pivot puts Iran in a tighter spot: to attract buyers back, Tehran may need to offer deeper discounts, further compressing revenues already squeezed by years of sanctions.

Revenue Consequences for Tehran

Iran’s oil revenues fund domestic government spending and support for regional proxies, making sustained disruptions to export cash flow significant beyond the energy market.

The precise volume of Iranian crude currently in floating storage was not disclosed in the Reuters report. Independent tracking of Iranian tanker positions is complicated by Iran’s documented use of vessel transponder manipulation and ship-to-ship transfers in international waters to obscure cargo origins.

What is clear is that the buyer shift is real enough for traders to cite it to Reuters. Whether it reflects a short-term inventory or price negotiation pause, or a more durable reorientation of Chinese refinery supply chains, will determine the ultimate revenue impact on Tehran.

Sanctions and Strategic Context

The tanker buildup arrives against a backdrop of intensified pressure on Iran’s economic links. Mysterious airstrikes on Iran-linked infrastructure earlier this week have added a kinetic dimension to what has primarily been an economic campaign.

China’s broader approach to sanctioned partners — including financial and trade tools that help allies navigate U.S. restrictions — has been documented in recent reporting. Whether that infrastructure can keep Iranian oil flowing to Chinese buyers under tighter enforcement conditions, or whether the teapot pivot represents a durable market signal, remains an open question.

Senator Lindsey Graham, who has pressed for tighter economic pressure on both Russia and Iran through China, has argued that Chinese buyers respond to supply alternatives and incentive structures — and the Reuters report suggests exactly that dynamic is in motion.

What Comes Next

Traders and analysts will be watching whether the Chinese buying pause is temporary or sustained. If UAE and other Gulf producers continue to expand output while Iranian barrels remain stranded, Tehran faces a prolonged revenue shortfall that its government budget cannot easily absorb.

For global oil markets, the scenario adds a wildcard: Iranian crude that finds no Chinese buyer could eventually accept steeper discounts to attract alternative takers, apply downward pressure on the low-end crude market, or prompt Tehran to adjust production levels.

The Reuters report cited traders as its primary sources. Independent corroboration of specific volumes, tanker identities, and buyer names was not available at publication time.

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For related coverage, see our reporting on Kyiv’s strikes on Russian fuel infrastructure and Russia’s gasoline output disruptions from Ukrainian strikes.