Amid tightened vessel supply due to the Middle East crisis, Abu Dhabi’s national oil company ADNOC has paid about $590 million to buy five supertankers to better manage its crude deliveries, Reuters reported on Friday, quoting sources with knowledge of the deal. ADNOC has acquired the five very large crude carriers (VLCCs) as the United Arab Emirates (UAE) looks to boost crude oil production and exports after exiting OPEC earlier this year, and despite the regional conflict that has stalled traffic through the Strait of Hormuz. ADNOC…