The U.S. Strategic Petroleum Reserve (SPR) has reached its lowest level since 1983, with recent data showing it at 319.5 million barrels as of the week ending July 3. This decline is largely due to significant releases, including 180 million barrels authorized by the Biden administration in 2022 to stabilize global markets after Russia's invasion of Ukraine, and further releases following recent tensions with Iran. The SPR, originally established in 1975 after the Arab oil embargo, has a maximum storage capacity of 713.5 million barrels, which it was last close to in the 2010s.
The purpose of the SPR is to provide emergency supplies during physical shortages and to reassure financial markets during major disruptions. It was tapped after Hurricane Katrina in 2005 and for six months following Russia's invasion of Ukraine. However, the current low levels limit the government's flexibility in addressing prolonged crises. While the U.S. produces more oil than any other country and is a net exporter, global oil prices are set by worldwide supply and demand, not solely domestic production. Therefore, disruptions in critical chokepoints like the Strait of Hormuz, through which roughly one-fifth of global oil supply passes, can significantly impact prices globally, even though only about 7% of U.S. crude consumption transits this strait.
Analysts express concern over the depleted state of the SPR. Abhi Rajendran of Rice University's Center for Energy Studies estimates that perhaps 100 million to 150 million barrels of the remaining supply may not be suitable for current refiners or export. The perceived dwindling effectiveness of the SPR as a buffer means less ability to calm markets and prevent speculative buying during price spikes. For instance, in early March, despite SPR releases following initial strikes on Iran, gasoline prices still surged from $2.98 per gallon to $4.48 per gallon by mid-May. Lower SPR levels imply less leverage for policymakers during ongoing conflicts, increasing the risk of sustained higher energy costs for consumers and industries.
