Strategic Oil Reserves in 2026 — What Is Left in the World's Buffers

The largest emergency release on record

On 11 March 2026, less than two weeks after US and Israeli military operations against Iran began on 28 February, the 32 member countries of the International Energy Agency agreed to make 400 million barrels of emergency oil stocks available to the market ^[1,9]. It was the sixth collective action in the agency's history, after 1991, 2005, 2011 and two in 2022, and by far the largest. The IEA described the war as creating "the largest supply disruption in the history of the global oil market" ^[1].

The commitments, tabulated on 15 March, comprised 271.7 million barrels of government stocks, 116.6 million barrels of obligated industry stocks and 23.6 million barrels of other stocks. Crude made up 72% and products 28% ^[1]. Stocks in Asia Oceania were available immediately, and those in the Americas and Europe from the end of March ^[1]. IEA members must hold stocks equal to at least 90 days of net imports ^[2].

By early October around 325 million barrels had been released ^[3,4]. On 2 October G7 leaders agreed to release 100 million barrels of diesel and crude over four months, with "a frontloaded substantial diesel release within the first 20 days". The statement did not say whether this was additional to the volume still outstanding from March ^[3].

On 7 October IEA members backed accelerating roughly 100 million barrels of releases, with diesel prioritised. The agency said members still held about 1.1 billion barrels of emergency stocks, including more than 200 million barrels of diesel. Executive Director Fatih Birol said the IEA "stands ready to release more of these stocks to the market if and when required" ^[4]. A further statement on 11 October asked all members, including those that had completed their pledges, to "assess whether additional diesel releases are necessary" ^[5].

The US SPR: a 44-year low, lent rather than sold

The United States pledged 172 million barrels from its Strategic Petroleum Reserve, the largest single contribution. The Department of Energy (DOE) said the barrels would be replaced with about 200 million barrels within a year, at no cost to taxpayers ^[6].

Rather than selling crude outright, DOE structured the drawdown as emergency exchanges: companies borrow crude and return it later with premium barrels. By late April, three requests for proposal had awarded about 80 million barrels at a 24% premium ^[7]. By 29 September, five solicitations had awarded more than 133 million barrels across four completed exchanges at a 25% premium. On that date DOE offered up to 40 million barrels more from its Big Hill and Bryan Mound sites ^[8]. Bloomberg reported that this was the final part of the US contribution and that Energy Secretary Chris Wright had signalled another drawdown was unlikely ^[9].

The effect on the reserve is stark. EIA weekly data put SPR stocks at 282.7 million barrels in the week to 16 October, against 408.6 million a year earlier ^[10]. That is the lowest level since 1982 ^[9]. Federal law bars non-emergency drawdowns once inventories fall below 252.4 million barrels ^[9]. Smaller targeted loans continue: on 23 October Reuters reported that DOE had authorised an emergency exchange of up to 400,000 barrels to address a supply disruption at Phillips 66's Lake Charles refinery in Louisiana ^[11].

Commercial buffers are also thin. In the week to 16 October, US commercial crude stocks stood at 412.5 million barrels, about 3% below the five-year average. Gasoline was 5% and distillate 9% below their five-year averages ^[10]. The EIA said East Coast distillate inventories were 32% below their five-year seasonal average in September ^[12].

Europe: uneven delivery and pressure over diesel

Delivery against the March pledges has been uneven. On 29 September Secretary Wright said "several European member countries have released only a fraction of the crude oil and petroleum products they pledged" ^[8]. The G7 diesel commitment followed US pressure on Europe, and leaders also agreed there would be no diesel export ban among G7 countries ^[3].

Releases are now reaching the market. On 23 October Reuters reported that Germany's stockholding agency EBV had issued a tender to sell diesel, heating oil and crude from strategic reserves. It was Germany's first such release since the G7 agreement ^[11].

China: drawing commercial stocks, holding strategic barrels

China holds the largest buffer outside the IEA system. In May, the Oxford Institute for Energy Studies (OIES) estimated Chinese crude stocks at 1.1–1.3 billion barrels, with around 100 million barrels of underground storage, most of it strategic ^[13]. Beijing banned refined product exports in March. Refiners were allowed to draw on commercial stocks, but requests to tap the strategic reserve were reportedly refused ^[13]. Crude imports fell to 9.3 million b/d in April, against close to 11 million b/d on average over the previous five years ^[13].

Bloomberg reported in June that China had begun drawing on commercial inventories in May. Analysts at Vortexa, Kpler and Energy Aspects expected draws of about 1 million b/d in the following months ^[14].

Later data show the scale of the draw. Reuters columnist Clyde Russell estimated implied draws of about 640,000 b/d in August and 530,000 b/d in September. Onshore stocks tracked by EA Crude Oil Inventories stood at 1.192 billion barrels in the week to 19 October, around 162 million barrels below the record 1.354 billion on 4 May ^[15]. The IEA reported that non-OECD crude stocks fell by 76 million barrels in September, with China accounting for 78% of the decline ^[16]. Russell noted that October imports could exceed 10 million b/d, which would reduce the need for further draws ^[15].

What thin inventories mean for price risk

The IEA estimates that global observed inventories were 509 million barrels below pre-war levels by the end of September ^[16]. The EIA's October Short-Term Energy Outlook estimates that global inventories fell by 1.9 million b/d in the third quarter and expects a further 0.7 million b/d decline in the fourth ^[17]. Its forecast includes the 40-million-barrel SPR exchange announced on 29 September, but not any additional supply from the G7 commitment ^[12].

Two market signals show where the stress is concentrated. Physical crude is trading at a wide premium to futures: the IEA noted North Sea Dated at around $134/bbl at the time of writing, while Brent futures were around $107/bbl ^[16]. Products are tighter than crude: wholesale diesel reached all-time highs of around $220/bbl in Europe and the United States ^[16].

Lower inventories have several consequences for price risk:

• Less shock absorption. With public stocks depleted, a further supply loss would have to be absorbed by prices and demand rather than by inventory.
• A deferred source of demand. Exchange barrels lent from the SPR must be returned with premiums, and China's commercial stocks are well below their May peak. Rebuilding both would add to crude demand once supply normalises.
• Product-led volatility. Diesel is the tightest part of the barrel, which is why the IEA and G7 have prioritised diesel in their releases ^[4,5].

What to watch

The key variables are the pace of the remaining IEA releases and whether members agree a new collective action. Other indicators to watch are the US SPR level relative to its 252.4-million-barrel statutory floor, and whether rising Chinese imports allow stockdraws to ease. The EIA expects Middle East shut-in production to average 4.5 million b/d in the fourth quarter ^[17]. Until those barrels return, emergency and commercial stocks remain the main buffer against further disruption.

Alupetra tracks inventory and supply developments across its Istanbul, London and Dubai offices.