The 2026 U.S.-Iran War and the Global Energy Crisis

Chapter 13: The Limit of 400 Million Barrels

13.1 The IEA's Largest Strategic Petroleum Reserve Release in History

Wednesday, March 11, 2026, Paris. Fatih Birol, Secretary General of the International Energy Agency (IEA), stood in the emergency press conference room at the organization's headquarters. The previous night, energy ministers from 32 member countries had gathered via video conference and unanimously decided on a response. Birol made the following statement: "The challenge we face in the oil market is unprecedented in scale. That is why IEA member states have undertaken an emergency joint response on an unprecedented scale."

400 million barrels. This number appeared on the screen at the press conference.

This was the sixth emergency release in the IEA's 52-year history since its founding in 1974. Yet the sum of all five previous releases did not match this single one. During the 1991 Gulf War, the United States released 33.75 million barrels. When Hurricane Katrina struck in 2005, the actual amount delivered was 11 million barrels. During Libya's civil war in 2011, the entire IEA released 60 million barrels of strategic reserves. Following Russia's full-scale invasion of Ukraine in 2022, the IEA released about 182.7 million barrels over two separate occasions, and the United States separately poured an additional 180 million barrels into the market over 180 days. That was the largest scale in IEA history.

The 400 million barrels released in March 2026 more than doubled that record.

The United States took on the largest share. Energy Secretary Chris Wright announced that the United States would release 172 million barrels from its strategic reserves. That was 43 percent of the total. French President Emmanuel Macron stated that G7 countries alone would cover 70 percent of the total release, announcing that France's share was 14.5 million barrels. Japan, South Korea, Germany, and the United Kingdom divided the remainder among themselves.

When the Wall Street Journal reported the news of this agreement a day early on Tuesday night, Brent crude fell sharply to around $87 per barrel. The price, which had soared close to $120 shortly after the war began, dropped more than $32 in a single night. However, when Birol finished his official announcement on Wednesday, oil prices began to move again. Brent crude closed around $91, up 4 percent on the day of the announcement. By Friday of that week, it had broken through $100 again. According to CNBC, oil prices rose more than 17 percent following the IEA's historic release announcement.

The reason the market was unmoved by this massive number came down to arithmetic.

Let us look at the figures the IEA itself disclosed. Based on 2025 data, crude oil and petroleum products passing through the Strait of Hormuz averaged 20 million barrels per day. Since the war began, export volumes through this strait fell to 10 percent or less of prewar levels. Birol himself admitted at the press conference that "roughly 15 million barrels of crude oil and 5 million barrels of petroleum products are cut off from global markets each day."

Dividing 400 million barrels by the daily loss of 20 million barrels gives us 20 days. CNN reported this calculation and wrote that "all would be absorbed within 26 days." Francesco Pesole, a strategist at Dutch bank ING, summed it up in one sentence: "The market sees this release not as a bazooka but as a water pistol."

Angie Gildea, global lead for oil and gas at KPMG, reached the same conclusion in a statement to NPR: "All the tools at our disposal, including strategic reserves, alternative export routes, and floating inventory at sea, can offer only modest relief at the margins of the crisis; they cannot be a structural solution. There is no way to replace the reopening of passage through the Strait of Hormuz."

Birol himself knew this fact. His closing remarks at the press conference made that clear: "Let there be no misunderstanding. The passage through the Strait of Hormuz must be restored for a stable flow of oil and gas to recover."

Maksim Sonin, an energy expert at Stanford University's Hydrogen Initiative, told PBS News: "This release will provide short-term stabilization effects. But if the war continues and the Strait of Hormuz remains effectively blocked, that effect will diminish." Pesole from ING added one more sentence: "Without a meaningful shift in military operations, Iran's hold over the strait will only grow stronger. Given its ability to lay mines, it will. That is why the oil market views the IEA's 400 million barrels as a water pistol, not a bazooka."

The IEA also issued a warning about the gas market. Birol pointed out that Asia was bearing the most severe impact, stating that "there are almost no alternatives to replace missing LNG cargoes from Qatar and the Emirates." His assessment was that global energy supply had declined by roughly 20 percent. It was not just crude oil. Gulf oil-producing nations had been exporting 3.3 million barrels of refined products and 1.5 million barrels of LPG daily in 2025. This flow had nearly entirely stopped.

The 400 million barrels was not a solution to the crisis. It was buying time for the world to endure until a solution arrived. And that time window was between three and four weeks.

The problem was that even that time window would be shortened by the gap between numbers on paper and the actual reality.

13.2 The Physical Constraints of U.S. Strategic Petroleum Reserves

Drive south from Freeport, Texas, and you will find 500 acres of flat land along the Gulf Coast. Bryan Mound. The largest of the four U.S. Strategic Petroleum Reserve (SPR) storage facilities. Above ground lie only rusted pipes, pump motors, and terminals corroded by salt-laden sea wind. The oil itself is underground. Between 600 and 1,200 meters below the surface, it sits in vast caverns made of salt.

The reason the U.S. Department of Energy chose salt caverns was cost. Storing crude oil in above-ground tanks costs $15 to $18 per barrel. Salt caverns cost $3.50 per barrel. A single cavern is large enough to hold the entire Willis Tower of Chicago. 60 meters wide and 600 meters deep. Sixty such caverns are scattered across four locations along the Texas and Louisiana Gulf Coast. Total capacity is 713.5 million barrels.

When the president signs an order for emergency release, the Department of Energy must extract the oil from these caverns. Here is how it works: water is injected from the top of the cavern. Since water is heavier than crude oil in a salt cavern, it sinks to the bottom and pushes the oil upward. The oil that rises moves through pipelines to surface terminals, and from there travels to refineries by tanker or pipeline.

This process has physical limits. According to official U.S. Department of Energy data, the maximum amount of crude oil that can be extracted from the SPR in a day is 4.4 million barrels. This rate can be maintained for 90 days. After that, the release rate decreases as the caverns empty. The time required from when the Energy Secretary announces the release, calls for bids, signs contracts, and begins delivery is 13 days.

13 days. Let me explain what this number means. Even if the president signs on a Monday, the oil will not actually arrive at refineries and begin to be refined into gasoline or diesel for two weeks. During those two weeks, refineries in Asia and Europe must make do with existing commercial stocks. When stocks run out, factories shut down, trucks stop, and lines form at gas stations. This is why, even as news of strategic reserve releases appears on screens, lines at gas stations remain unchanged.

If the United States releases its promised 172 million barrels over 120 days, that averages 1.43 million barrels per day. The IEA's total 400 million barrels divided over the same period equals about 3.3 million barrels per day. That is attempting to fill a hole losing 20 million barrels daily with only 3.3 million barrels per day. Natasha Kaneva, head of commodity strategy at JPMorgan, was more pessimistic. She analyzed that the actual release rate for the G7 might reach only 1.2 million barrels at most per day. At this pace, it would take nearly a year to release all 400 million barrels to the market.

It cannot be released quickly enough, and releasing it slowly has no meaning.

To make matters worse, the U.S. SPR magazine was already half empty. After the Biden administration released its largest-ever volume in response to the Russia-Ukraine war in 2022, SPR inventory fell to its lowest point in 40 years. After the Trump administration took office, Energy Secretary Chris Wright requested a $20 billion budget for SPR replenishment, but war broke out before that could happen. As of March 2025, U.S. SPR holdings were about 395.3 million barrels. This was 55 percent of total capacity of 713.5 million barrels.

Secretary Wright revealed another fact at the congressional hearing: the rapid release in 2022 had caused structural damage to the storage facilities themselves. If water is injected too quickly and in too large quantities into salt caverns, the cavern walls erode faster than expected. According to a report from Sandia National Laboratories, of the 60 caverns, 20 had already exhausted one complete release cycle, and one cavern had completely exhausted its available release cycles and could no longer be used. Cavern storage space was declining by roughly 2.4 million barrels annually due to natural geological pressure and pressure reduction for maintenance. The cost of repairs exceeded $100 million.

The world's largest emergency oil storage facility faced an emergency while unprepared for one.

The United States consumes roughly 20 million barrels of oil per day. A reserve of 395 million barrels amounts to only 20 days of consumption if used by the U.S. alone. Even calculated on an import basis, it amounts to 47 days. Subtract the 172 million barrels being released, and what remains is 223 million barrels. If the Iran war drags on for six months or longer, the United States loses its emergency reserves for future crises. Hurricane season begins in June.

13.3 Easing Sanctions on Russia and Venezuela

On the evening of Thursday, March 12, U.S. Treasury Secretary Scott Bessent issued a statement. It announced a temporary easing of sanctions on Russian crude oil. The statement indicated that a General License would be issued permitting the purchase and delivery of Russian crude oil already loaded onto tankers as of March 12 for 30 days. The license would be valid through April 11.

Bessent called this measure a "narrowly tailored short-term measure." He explained it was designed "to stabilize global energy markets and lower prices." He added: "This measure applies only to oil already in transit, and will not provide Russia's government with meaningful financial benefit."

The market read it differently.

Data from the Centre for Research on Energy and Clean Air (CREA) shows why. From March 1 to 15, Russia earned an average of $513 million per day (about 472 million euros) from fossil fuel exports. The total for 15 days was $7.7 billion (about 7.1 billion euros). This represented a 14 percent increase compared to the February average.

Two factors converged to cause this surge.

First was the rise in oil prices themselves. With Brent crude hovering around $100, the price of Russian Urals crude also climbed. Luke Wickenden, a Europe-Russia energy analyst at CREA, explained to CBS News: "Before the easing of sanctions, Russian crude was being traded at a discount of 10 to 20 percent below international rates. Now that discount has completely disappeared. It is selling at essentially the same price as Brent crude."

Second was a shift in demand. With the Strait of Hormuz blocked, India could no longer source Middle Eastern crude and urgently pivoted to Russian oil. According to CREA, India's average daily imports of Russian crude surged 82 percent in the first three weeks of March compared to February. Since roughly one-third of China's maritime crude imports had been routed through the Strait of Hormuz, Beijing too had to increase its Russian crude purchases. New buyers like Thailand and Vietnam were also beginning to appear.

Bloomberg's ship-tracking data shows this shift in numbers. East of the Suez Canal, 18 tankers carrying Russian crude were listed for sale. Total of 13.5 million barrels. Two weeks earlier, there were 25 ships and 19 million barrels. This means they were being sold.

Summed up in one sentence: the war the United States began to eliminate Iran's nuclear threat has ended up causing the United States to release with its own hands the very Russian sanctions it had spent years tightening.

The Washington Post captured this situation precisely in its March 12 headline. Reporting the Treasury's easing of Russian sanctions, it framed it as "an attempt to address the economic fallout of the Iran war." A situation where, in trying to manage the economic costs of a war begun to strike Iran, the United States has opened Russia's breathing room. EuroMaidanPress was more direct in its headline: "Russia did not fix its oil revenues. The U.S. Air Force did."

Western sanctions had reduced Russian fossil fuel revenues for eight consecutive months, bringing daily average earnings down to $501 million in January 2026, the lowest point since the invasion of Ukraine. Then on February 28, the United States bombed Iran, and within two weeks, Russia's daily average revenues had jumped to $554 million. Eight months of progress had been reversed in two weeks.

President Zelenskyy said in a CNN interview on March 15: "Lifting sanctions will only help Russia." Citing analysis from Ukrainian intelligence, he stated: "As a result of US and EU sanctions and our deep strikes on Russian energy infrastructure, Russia faced a deficit exceeding 100 billion dollars in 2026 alone."

More dramatic changes were underway on the Venezuela side. On March 18, the US Treasury Department issued broad licenses to ease sanctions on PDVSA (Petróleos de Venezuela S.A.), Venezuela's state-owned oil company. The measure allowed US companies to purchase crude oil directly from PDVSA and trade it on the global market. Given that Washington had essentially frozen transactions with the Venezuelan government and oil sector for years, this represented a complete reversal of policy.

Some background is necessary. The Trump administration had deposed and arrested President Nicolás Maduro through military operations in January 2026, then declared that the United States would essentially "operate" Venezuela. Energy Secretary Chris Wright visited Caracas in mid-February, and Interior Secretary Doug Burgum visited in early March. Venezuela's National Assembly passed major reforms lowering oil-related taxation under US pressure, just before Shell and Chevron were poised to sign large production contracts.

Yet despite all these moves, Venezuelan crude would not immediately flood the market. Geoff Ramsey, a Latin America expert at the Atlantic Council, offered this assessment: "Dramatic changes in Venezuela's production levels take 12 to 18 months to materialize." Venezuela's oil output had collapsed from 3.5 million barrels per day when Hugo Chávez took power in 1999 to less than 400,000 barrels per day by 2020. Experts estimated that reviving depleted oil fields with devastated infrastructure would require over 100 billion dollars in investment and a decade of work.

White House Press Secretary Karoline Leavitt invoked a 60-day exemption to the Jones Act (the 1920s law requiring US-flagged vessels for cargo transport between American ports), explaining that the measure would allow "essential resources such as oil, natural gas, fertilizer, and coal to flow freely into US ports" during the Iran war.

The pattern was clear. In March alone, the United States had launched a war to strike Iran, relaxed sanctions on Russia to contain the oil spike that war created, brought Venezuelan oil into the global market, and temporarily suspended its own maritime protection law. It had sought to suppress Iran while conceding every other front.

Resistance surfaced across the Atlantic. The Atlantic Council published commentary from Vilnius, Lithuania: "Once the United States begins loosening constraints, some European countries will also demand the same measures from Brussels. That pressure is already visible." Hungarian Prime Minister Viktor Orbán publicly called on the EU to end sanctions on Russian energy. European Commission President Ursula von der Leyen warned that returning to Russian energy would be a "strategic mistake," but German gas stations were forced to introduce emergency rules limiting price increases to once per day, and Austria capped them at three times per week.

The energy crisis was now testing the cohesion of alliances themselves.

One layer of irony ran deeper still. A significant portion of Russian crude released by the US Treasury's easing of sanctions consisted of floating inventory. Tankers carrying crude oil that had failed to find buyers. As of late February, this amounted to approximately 6.9 million tons, worth 2.3 billion euros (roughly 2.5 billion dollars). Once these tankers sold their cargo, empty vessels could return to Russian ports to load fresh supplies. CREA made this observation: "Clearing stranded oil frees up tanker capacity, removing the bottleneck that had constrained Russia's export ability."

The easing of sanctions was temporary, lasting 30 days. But the money flowing into Russia during those 30 days would finance Russia's war in Ukraine. It translated into the cost of missiles and drones. Euromaidan Press posed this question in an article dated March 25: "When the sanctions reprieve expires in early April, Washington will be unable to avoid asking whose war it was funding."

13.4 The Vanishing of Breathing Room

In the final week of March, Marko Papic, chief geopolitical strategist at BCA Research, sent a note to clients. It carried no headline, but its message condensed to a single sentence: mid-April is a cliff.

Papic's calculation proceeded as follows: The war had caused the world to lose 4.5 to 5 million barrels per day of oil supply. This represented roughly 5 percent of global supply. The scale was comparable to past crises: the 2011 Libyan civil war or the 2019 Saudi Aramco facility attack. It was not a level the market could not absorb.

The problem was that this figure was not stable.

Papic identified three temporary buffers: First, the IEA's release of 400 million barrels from strategic reserves. Second, temporary sanctions waivers the United States had issued on Russian and Iranian crude. Third, the psychological effect of President Trump's repeated suggestions that "the war will end soon," preventing futures traders from pricing in worst-case outcomes. According to Papic's analysis, these three factors had kept oil prices around 100 dollars per barrel rather than at 200.

All three had expiration dates.

The market absorption of 400 million barrels of strategic reserves requires approximately 3 to 4 weeks. The sanctions waiver on Russian crude expires April 11. Trump's ultimatum to Iran expires April 6. Papic identified the convergence point of these three deadlines as around April 19.

"That figure doubles in mid-April. It becomes the largest crude oil supply loss in recorded history."

CNBC reported, citing Papic: "The world will face an oil cliff in mid-April. Strategic reserves, sanctions exemption volumes, Russian and Iranian supplies will all be exhausted."

Papic was not alone in sounding this alarm. Daan Struyven, co-head of commodities research at Goldman Sachs, called the Strait of Hormuz closure "the largest supply shock in Goldman Sachs' modeling history" in a March 22 client note. Goldman Sachs built its base-case scenario around traffic through the strait remaining at 5 percent of normal for six weeks, then gradually recovering over a month. In this scenario, cumulative oil loss exceeds 800 million barrels.

Yet Goldman Sachs unveiled a darker scenario. If strait passage remained constrained throughout March, oil prices could exceed the 2008 record of 147 dollars per barrel, it warned. By mid-March it was calculating that "the physical impact of the Strait of Hormuz is 17 times larger than the maximum production loss from the April 2022 Russia-Ukraine war."

Wood Mackenzie took the argument further: "200 dollars per barrel is not outside the range of possibility in 2026."

The physical market was already outpacing the futures market. Dubai crude, reflecting actual delivery prices in the Gulf, surged 76 percent since the war began, reaching roughly 126 dollars per barrel. Brent futures rose 36 percent over the same period. The widening gap between paper prices and physical prices signaled that crude oil actually reaching refineries and petrochemical plants was running short.

The US Energy Information Administration projected in its March 10 short-term outlook that Brent would stay above 95 dollars per barrel for the next two months. The Federal Reserve Bank of Dallas released modeling showing that a one-quarter closure of the Strait of Hormuz would reduce global GDP growth by 2.9 percentage points. Goldman Sachs raised the probability of US recession to 25 percent.

Governments were already in motion. The Philippines declared a national energy emergency on March 24 and cut government agencies to a four-day work week. Germany imposed emergency rules limiting gas station price increases to once daily. Austria capped them at three times weekly. Austrian Economy Minister Wolfgang Hattmannsdorfer stated: "In times of crisis, profiteers must not gain at the expense of commuters and businesses." The US national average gasoline price reached 3.98 dollars per gallon, a dollar higher than a month before. California averaged 5.84 dollars, with some stations exceeding 7 dollars.

Assembled, these numbers sketched the outline of the "cliff" Papic had described.

By the final week of March, the world economy occupied this position: Strategic reserves spray water from a fire extinguisher, yet the fire burns larger. The emergency infusion of relaxed Russian sanctions loses its needle on April 11. Trump's "it will end soon" repeats weekly, yet the Iranian Revolutionary Guards declare: "Not a single liter of oil will pass through."

A senior White House official told reporters in a background briefing: "We see Russia moving to increase exports and fill that gap, so some breathing room remains."

CNBC appended one sentence to that statement: "That breathing room is real, but it is shrinking."

What comes after breathing room vanishes, no one has experienced. The oil industry holds no precedent for a 20-million-barrel-per-day supply loss lasting more than a month. The 1973 Arab oil embargo was an export ban, not a physical blockade. During the 1980 Iran-Iraq War, the strait itself was never fully closed. In March 2026, the world was entering territory it had never entered since petroleum made civilizations move.

Papic identified one further danger: production halts themselves. A blocked Strait of Hormuz leaves Gulf producers nowhere to ship what they extract. Storage tanks fill and stop accepting more. Wells shut down. The IEA's March Oil Market Report documented that 3 million barrels of Middle Eastern refining capacity had already idled. From strikes or severed export routes. By Papic's analysis, restarting shuttered wells demands weeks or months. Should the strait reopen tomorrow, additional time passes before oil flows at full speed. Chevron's CEO warned: "Even with the strait reopened, moving the right crude to the right place takes weeks. Risk premium will fall gradually, not all at once."

400 million barrels were a temporary span that delayed the bridge's collapse by three weeks. If the bridge sits unrepaired beyond that, the temporary span bears only so much weight. With each page the April calendar turns, that limit approaches.

AI expert, lawyer Kim Kyung-jin

Specialist in AI law and policy, former National Assembly member, author of multiple works

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