Nigeria’s $20 billion Dangote Refinery has reportedly issued a term tender to buy two million barrels of US crude oil monthly. This is according to a recent report by Bloomberg. The 650,000-barrel refinery established by Africa’s richest man, Aliko Dangote, is exploring all routes to achieving 100 per cent production capacity. According to the report, the tender closes at 3 p.m. on May 21. One trader of West African barrels said the tender shows how Nigerian crudes are struggling to compete against American supply. The refinery, currently under construction in the Lekki Free Zone near Lagos, N…