Money These 15 countries, as home to largest reserves, control the world’s oil May 22, 2019Samuel Stebbins, 24/7 Wall StreetComments Off on These 15 countries, as home to largest reserves, control the world’s oil The 15 countries with the largest proven oil reserves span five continents and control between 12.8 billion barrels to 303.2 billion barrels of oil.