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Giant Oil Storage Tanks Increasingly Hold Very Little Crude

Created at 28 Aug · 9:11 AM1 source↑ Market-relevant
IN SHORT

Oil companies and governments are depleting vast stockpiles, particularly at Cushing, Oklahoma, due to ongoing struggles over the Strait of Hormuz and operational minimums known as 'tank bottoms.'

Key Numbers

20 million barrelscrude oil inventories at Cushing, Oklahoma
$0 dollars per barrelWTI-Brent spot price differential
January 2022last time WTI-Cushing price spread was this low

Who's Involved

U.S. Energy Information Administration
explains critical Cushing Hub oil levels and 'tank bottoms'
Thomson Reuters
data source for petroleum status reports
Giant Oil Storage Tanks Increasingly Hold Very Little Crude

↳ Why This Matters

Depleting oil stockpiles and approaching operational minimums at key storage hubs like Cushing can lead to price volatility and signal potential supply constraints, impacting global energy markets and refinery operations.

Key facts

  • Oil companies and governments are drawing down once vast crude oil stockpiles.
  • The Strait of Hormuz remains a point of contention between Iran and the United States.
  • Inventories at Cushing, Oklahoma, a key pricing hub for WTI, have fallen below 20 million barrels.
  • Low inventory levels can approach 'tank bottoms,' the minimum volume required for operational functionality.
  • The price differential between Brent and WTI crude has turned negative, suggesting extreme tightness in Cushing storage.

Vast stockpiles of crude oil held by companies and governments are being depleted, with significant implications for market pricing and supply. The ongoing struggle for control over the Strait of Hormuz between Iran and the United States is a contributing factor to this drawdown.

Specifically, crude oil inventories at the Cushing Hub in Oklahoma, a critical pricing point for West Texas Intermediate (WTI), have fallen below 20 million barrels. This decline raises concerns about operational capacity, as storage facilities require a minimum volume, known as 'tank bottoms,' to function properly. If levels fall too low, pumps can become ineffective, preventing the transfer of oil.

The low inventory levels at Cushing have coincided with a negative price differential between WTI and international benchmark Brent crude. This suggests that the WTI price at Cushing has risen above the Brent spot price, indicating extreme tightness in the market for deliverable crude oil at that location. This situation has not been seen to this extent since January 2022.

Frequently asked questions

Tank bottoms refer to the minimum volume of crude oil that must remain in storage tanks and pipe infrastructure to ensure operational functionality, such as effective pump suction.

Cushing is a major storage and delivery hub for West Texas Intermediate (WTI) crude oil, and its inventory levels significantly influence WTI pricing.

A negative differential means WTI crude priced at Cushing is more expensive than Brent crude, suggesting tight supply and high demand for deliverable crude at Cushing.

What Happens Next

01EIA is reviewing results of a pilot study on minimum working inventory levels.
CME Headlines
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  • Performance Bond Requirements: Energy - Effective August 28, 2026
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How It Developed

Oil companies and governments are consuming vast stockpiles.
Iran and the United States continue to struggle for control over the Strait of Hormuz.
Crude oil inventories at Cushing, Oklahoma, fell below 20 million barrels.
The spot price differential between Brent crude and WTI crude became negative.
Low inventory levels may be near 'tank bottom' operational limits.

Sources

T1
Why These Giant Storage Tanks Increasingly Hold Very Little OilThe New York Times
T2
EIA explains why Cushing Hub oil levels are criticalokenergytoday.com

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