The U.S. Strategic Petroleum Reserve has fallen below 300 million barrels for the first time since 1983, dropping to 298.7 million barrels following coordinated emergency releases designed to offset supply disruptions tied to the ongoing conflict with Iran and the closure of the Strait of Hormuz.
Crude oil stockpiles inside the nation’s emergency reserve dropped by 6.1 million barrels last week, according to data released by the Department of Energy. The multi-decade low comes in the wake of a 172-million-barrel drawdown ordered by President Donald Trump in March. That massive release was triggered when Iran choked off oil exports through the Strait of Hormuz, setting off what analysts describe as the largest disruption of crude oil supplies in history.
Strait of Hormuz Closures Keep Global Supply Pressures High
The protracted closure of the vital Middle Eastern waterway has drastically slowed commercial transit. Intelligence firm Kpler reported that only two vessels navigated the chokepoint on a recent Wednesday, a stark drop from the 130 to 140 ships that passed through daily before the war broke out in late February.
Hopes for an immediate diplomatic breakthrough have dimmed as Washington and Tehran remain far apart. While top U.S. officials anticipated an imminent reopening agreement, Tehran rejected U.S. involvement in talks and laid out stringent conditions over the weekend. Through the Supreme National Security Council, Iran demanded an end to U.S. aggressive behavior, a permanent halt to military operations in the region, the lifting of naval blockades and economic sanctions, and the unconditional release of frozen Iranian assets.
Against that backdrop of stalled negotiations, international oil prices jumped sharply. Brent crude rose by more than 4% to trade at over $85 per barrel, while U.S. benchmark West Texas Intermediate climbed past $80 a barrel before settling near $80 to $85 depending on the contract.
Infrastructure Strains and the Mechanics of the Emergency Reserve
Established in 1975 in the wake of the Arab oil embargo, the Strategic Petroleum Reserve is authorized to hold up to 714 million barrels in underground salt caverns along the Gulf coasts of Texas and Louisiana. However, repeated deployments by successive administrations have steadily drained the facility.
President Joe Biden previously deployed 180 million barrels in 2022 following Russia’s invasion of Ukraine—marking the largest release in the reserve’s history. Government watchdogs warn that heavy reliance on the stockpile has accelerated wear and tear on storage infrastructure.
Compounding the depletion challenge, a Government Accountability Office report from May noted that more than a quarter of the reserve’s inventory was unavailable for use due to maintenance and cavern outages. According to an analysis by Rapidan Energy, this structural limitation means at least 103 million barrels of the current total cannot be drawn down immediately.
Refilling Challenges and Market Stabilization Strategy
To manage the crisis without permanently depleting national reserves, the Energy Department has structured many of the recent U.S. releases as exchanges rather than outright sales. Companies borrowing the crude are required to return the volume later along with a premium of extra oil, a mechanism officials maintain will stabilize markets at no cost to taxpayers.
Patrick De Haan, head of petroleum analysis at GasBuddy, noted on social media that reserve inventories are likely to decline for several more weeks before the authorized release cycle concludes.
Despite the historic lows, energy experts remain divided on whether the reserve faces immediate peril. David Goldwyn, a former State Department special envoy for international energy affairs, told CNBC that he is not worried about the stability of the reserve or the government’s technical capacity to execute another drawdown if conditions demand it. With government stocks projected to slide to roughly 243 million barrels once the current 172-million-barrel mandate is fulfilled, traffic through the Strait of Hormuz and future federal purchasing timelines will dictate how quickly Washington can begin rebuilding its principal energy buffer.
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