Hugo Chavez

In Venezuela politics and oil have become inseparable. But Hugo Chavez' health problems have sparked fears of a political vacuum in the oil-rich country that could jeopardize a multi-trillion dollar crude industry.

Venezuela is Latin America's biggest oil exporter and the fourth largest supplier of petroleum products to the United States. It also holds the world's largest oil reserves, surpassing Saudi Arabia, according to BP data. The state-owned Petroleos de Venezuela (PDVSA) manages the exploration and refining of oil, which accounts for almost 95 per cent of export earnings and 28 per cent of the Venezuelan GDP.