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The desert kingdom has around 16% of the worldâs proven oil reserves and is the biggest global exporter of petroleum liquids. There is little doubt as to why its national oil company, Saudi Aramco, the biggest energy company in the world, generates over $1 billion in revenue every single day.
The Price of Nigerian Oil. Nigeria is one of the world's richest oil and gas zones but is still held back by civil unrest. Fleur Doidge reports. West African nation Nigeria is in the top ten largest oil and gas producers globally and is the largest oil producer in Africa. So it is no surprise that it regularly makes headlines.