Oil prices fell on Wednesday as expectations of a rise in U.S. crude inventories outweighed supply disruptions and escalating geopolitical tensions.
Brent crude slipped 0.9% to $64.37 a barrel, while U.S. West Texas Intermediate fell 0.7% to $59.92 by mid-morning GMT.
The decline came despite Kazakhstan halting production at the Tengiz and Korolev oilfields, two major sites, due to power distribution problems.
Industry sources said the shutdown could last between seven and ten days, but analysts viewed the impact as temporary.
Market pressure was reinforced by forecasts that U.S. crude stockpiles rose by about 1.7 million barrels last week.
The American Petroleum Institute and U.S. Energy Information Administration are expected to confirm inventory data later this week.
Geopolitical risks also weighed on sentiment after U.S. President Donald Trump renewed threats of tariffs over efforts to gain control of Greenland.
Analysts said such tensions could slow global economic growth, dampening oil demand.
However, some support remains from potential escalation in U.S.-Iran relations following unrest in Iran.
Overall, traders adopted a risk-off stance, focusing more on supply builds than short-term outages or political shocks.