From as recently as March 1st, there's this story about the supply glut with storage and tankers full of oil.

The queue of ships waiting outside Europe’s biggest port and oil-trading hub of Rotterdam has grown to the longest in seven years as a global supply glut fills storage capacity.

As many as 50 oil tankers, twice as many as normal, are waiting outside Rotterdam because storage sites are almost full, the port’s spokesman Tie Schellekens said by phone on Tuesday. 

bloomberg.com/ne...r-high