FACTBOX | Venezuelan oil industry: world's largest reserves, decaying infrastructure

Following are key facts about the oil industry of Venezuela, whose illegitimate president Nicolas Maduro was captured by US forces on Saturday, according to US President Donald Trump.

Reserves

Venezuela has the world's largest oil reserves but its crude output remains at a fraction of capacity due to mismanagement, lack of investment and sanctions, official data shows.

Venezuela holds about 17 per cent of global reserves or 303 billion barrels, ahead of Organisation of the Petroleum Exporting Countries (OPEC) leader Saudi Arabia, according to the London-based Energy Institute.

Its reserves are made up mostly of heavy oil in the Orinoco region of central Venezuela, making its crude expensive to produce, but technically relatively simple, according to the US Government's energy department.