Analyst predicts how long it will take to refill oil inventories as tensions escalate between Washington and Tehran.

The world's oil stockpiles could approach all-time lows by the end of May due to the Strait of Hormuz closure, according to UBS.

Oil prices could top $130-$140 a barrel next month if the strait remains closed and inventory depletion rates remain steady, according to Capital Economics.

IEA chief Birol warns of rapidly depleting oil inventories, citing the Iran war and limited strategic reserves.