So as more and more storage moves offshore, here is an update from Bank of America on the current status of the oil market as the "oil glut moves from tanks to tankers."
In the last five weeks, onshore inventories held in floating top tanks climbed 180mn bbl, suggesting that builds have averaged roughly 4.3mn b/d since mid-March. These inventory increases reduce BofA's estimates for available onshore crude storage capacity from roughly 910mn bbl to 730 mn bbl (Chart 2), although the bank still believes that this capacity is unlikely to be fully utilized due to logistical constraints and other issues.
How did we get here? As has been extensively reported here and elsewhere, WTI timespreads signalled a massive build in Cushing inventories and stocks would likely reach their operational limits within a few weeks (Chart 3). More recently, the expiration of the May WTI contract demonstrated the lack of available capacity at the hub.