An international oil analyst is warning global oil prices could hit US$150 a barrel if the situation in the Strait of Hormuz doesn't improve soon.Prices for Brent crude have hit US$100 for the first time since May, after two Saudi oil tankers in the Red Sea were hit by Yemen's Iranian backed Houthi rebels.The attacks are raising fears of further global supply disruptions following a near-halt in trade through the Strait of Hormuz.Dr Adi Imsirovic, lecturer on energy systems at the University of Oxford, told Nine to Noon we were now seeing a repeat of the initial oil crisis in April, although personally he felt this time it was an even more dire situation."Then we had very high stocks - we are drawing down those stocks. Right now we have drawn down at least half, probably three quarter of those stocks"Recently, Goldman Sachs issued a forecast that prices might hit US$120 in the next quarter if the conflict was to continue.Adi said he thought there was a risk it goes even higher."Stocks are very low, we have both straits blocked, and unless something happens very, very soon I could quite honestly see the price going to US$150."Aid said in March and April oil was moving out of the Red Sea. But with it being now blocked, it will take another 5 to 6 million barrels out of the supply chain.