US Strategic Petroleum Reserve Falls to 311 Million Barrels as WTI Climbs to $91 on Iran Risk

The United States Strategic Petroleum Reserve held 311.4 million barrels of crude oil as of July 17, 2026, down 91.1 million barrels from 402.5 million barrels one year earlier. That 22.6 percent decline over 12 months has brought the reserve to 43.6 percent of its 714 million barrel authorized storage capacity, according to data published July 22 by the U.S. Energy Information Administration. The drawdown is occurring as West Texas Intermediate crude climbs to $91.47 per barrel, roughly $23 more than the benchmark carried one year ago.

Coverage Ratio Holds Above IEA Threshold

The United States averaged 2.015 million barrels per day of net crude oil imports in the four weeks ending July 17. At that import rate, the 311.4 million barrel reserve provides 154.5 days of net crude import coverage, well above the 90-day minimum the International Energy Agency requires of member countries. That IEA calculation is a partial picture: the US simultaneously exports large volumes of refined petroleum products, making it a net petroleum exporter by roughly 4 million barrels per day on a total product basis.

Because US consumers pay global market prices regardless of export volumes, the size of the reserve still matters for domestic price stabilization. The four Gulf Coast salt cavern sites that comprise the reserve can begin releasing crude into commercial pipelines within 13 days of a presidential drawdown order, the Department of Energy has stated. That rapid-deployment capability makes the reserve an emergency tool for short-duration supply shocks rather than a long-duration strategic buffer.

Draw Rate Accelerates in Latest Week

The EIA data shows the reserve shed 5.1 million barrels in the single week ending July 17, falling from 316.5 million barrels to 311.4 million barrels. That weekly decline is substantial relative to normal week-to-week variation in reserve levels. At a sustained rate of 5 million barrels per week, the reserve would fall below 300 million barrels before the end of August 2026.

WTI Surge and Geopolitical Risk Raise Stakes

WTI crude traded at $83.43 per barrel on July 17, 2026, the EIA data shows. By Wednesday afternoon, the benchmark had risen to $91.47 per barrel, a gain of $8.04 per barrel in six trading days, according to OilPrice.com. The advance reflects ongoing military operations involving US forces and Iranian oil infrastructure, along with Houthi attacks disrupting Red Sea shipping lanes. Brent crude, the international benchmark that trades on the ICE exchange, stood at $99.88 per barrel Wednesday afternoon.

The Department of Energy has historically authorized formal emergency SPR releases on only a limited number of occasions. Under the Energy Policy and Conservation Act, a release requires a finding that supply disruptions are sufficient to threaten national economic security. Elevated crude prices and below-average inventories across all US petroleum products are heightening political pressure for a drawdown even short of a formal statutory trigger.