Few men in the world are sitting on most of its oil, and even fewer know how much oil there is. Nansen Saleri, who once headed all the oil reservoirs in Saudi Aramco, today is the world's best-known expert in determining oil reserves. For years, experts have questioned crude prices may have surged to almost $150, but Saleri believes, if you minus the speculation, crude prices should cool off. For now his prediction seems to be coming true.