As Aramco audits reserves, market wonders how much oil is left?

Dubai

WHEN Saudi Aramco reveals a Western audit of its oil reserves, investors will be looking for two answers: How much oil and how much detail?

Saudi Energy Minister Khalid al-Falih has hinted at a surprise on the upside on reserve volumes ahead of Aramco's 2018 share listing, but industry sources say detail on individual deposits - which investors have long sought - will be thin.

Saudi Arabia's reserves of easily recoverable oil have long been the world's largest.

But there also have long been questions about the volume and quality of thos…