Canadian Oil Supply Disruptions Threaten U.S. Refineries and Key Storage Hub
A combination of severe weather and a major power outage at a key oil sands operation has disrupted crude oil exports from Western Canada, raising concerns about potential supply shortages at the critical Cushing storage hub in Oklahoma and at refineries across the U.S. Midwest.
Weather and Power Outage Hit Oil Sands Production
Heavy rains in northern Alberta have temporarily slowed oil sands mining operations, while a power outage last week at Cenovus Energy’s Foster Creek and Christina Lake facilities forced the company to declare force majeure, according to three sources who spoke to Reuters. The power disruption knocked approximately 10 percent of Cenovus’s oil sands production offline, as noted in a research report from Energy Aspects. Cenovus did not immediately respond to a request for comment.
Western Canada Inventories Plummet
The disruptions have contributed to a sharp drawdown in Western Canadian crude oil inventories. Lee Williams, an analyst at Wood Mackenzie, said inventories in the region are now at their lowest level since 2020. “As of last week, Western Canada’s crude oil inventories had declined by more than 4 million barrels over the past two weeks and by almost 8 million barrels since the end of February,” Williams said in an email.
Canadian heavy crude oil prices have responded accordingly, with Western Canada Select’s discount to the North American benchmark West Texas Intermediate narrowing by approximately $4 since the end of May.
Global Market Already Strained
The Canadian supply disruptions are compounding an already tight global oil market. Roughly a fifth of global oil and gas shipments remain bottlenecked behind the Strait of Hormuz amid the ongoing U.S.-Israeli conflict with Iran. U.S. crude oil inventories, including strategic reserves, have fallen by 79 million barrels since the Iran war began in late February, with Cushing inventories approaching their operational low point.
U.S. Midwest Refineries Particularly Vulnerable
Canada is the world’s fourth-largest oil producer and the largest foreign supplier of crude oil to the United States. Canadian crude flows into storage tanks at Cushing and to refineries in the Midwest and Gulf Coast. Refineries in the U.S. Midwest are especially dependent on Canadian oil because they lack access to waterborne crude supplies, and many are specifically designed to process oil sands crude.
Strong Asian Demand Adds Pressure
Canadian crude has also seen heightened demand since the start of the Iran conflict, particularly from Asian buyers who view Canada as a secure source of supply. Canada’s Trans Mountain pipeline, which carries heavy crude to the Pacific Coast for export overseas, is operating at full capacity for the first time since the completion of a major expansion two years ago.
The convergence of Canadian supply disruptions, surging international demand, and the ongoing Strait of Hormuz standoff has created a perfect storm for global oil markets, with analysts closely watching whether the situation stabilizes or worsens in the coming weeks.
