Introduction
The global oil market is heading into a turbulent phase, with supply growth far outpacing demand. According to the International Energy Agency (IEA), surging production—driven largely by Saudi Arabia and OPEC—is clashing with a slowdown in consumption, especially across Asia.
The IEA has slashed its global oil demand forecast for 2025 to just 680,000 barrels per day (b/d)—about one-third lower than January’s projection. This marks the slowest demand growth in over a decade, excluding the Covid-19 slump.
Demand weakness is most visible in China, India, and Brazil, where economic uncertainty and looming tariff battles with the US are dampening energy consumption. This was the sixth straight downward revision by the agency this year.
Supply Soars While Prices Drop
On the supply side, the IEA expects global production to expand by 2.5 million b/d this year, about 30% higher than earlier estimates. This sharp uptick, largely from OPEC producers led by Saudi Arabia, has pushed the market into oversupply.
Brent crude prices have already slipped by more than 12% in 2025, trading near $65 a barrel.
Excess production earlier this year was absorbed into storage, with China alone taking on more than 90% of the second-quarter increase.
From autumn onward, however, the IEA anticipates a persistent surplus of around 2 million b/d, lasting well into 2026.
Risks and Uncertainty Ahead
Despite the oversupply, the IEA noted that the balance could shift quickly if US sanctions intensify on Russia or Iran, the world’s third- and fifth-largest oil producers. Such geopolitical shocks could tighten markets unexpectedly.
Meanwhile, OPEC’s outlook differs sharply. The oil cartel projects stronger demand growth and lower non-OPEC supply, forecasting demand to rise by 1.38 million b/d in 2026—nearly double the IEA’s projection.
Adding to the confusion, the three major forecasting bodies—the IEA, OPEC, and the US Energy Information Administration (EIA)—disagree on storage trends. The EIA believes over 300 million barrels were added to inventories in the first half of 2025, the IEA estimates 225 million, while OPEC claims stocks actually fell by 70 million barrels.
Bottom Line
The global oil outlook has rarely been more uncertain. On one side, Saudi-led production growth is flooding markets and pressuring prices. On the other, demand forecasts are being revised lower amid trade tensions and slowing economies.
For now, the IEA sees a world awash in oil. But with sanctions, tariffs, and diverging forecasts clouding the picture, the only certainty is that volatility will remain a defining feature of the market into 2026.
