The largest 3 oil producing countries

1- Venezuela :
Venezuela ranked first in the world with its proven oil reserves of 297.7 billion barrels. But Venezuela still relies heavily on oil revenues, which account for nearly 96 percent of exports, about 40 percent of total government revenues and 11 percent of GDP, according to CIA statistics.

2- Saudi Arabia :
Saudi Arabia is one of the most prominent players in the oil trade around the world and is a key member of the Organization of Petroleum Exporting Countries, OPEC. More recently, the kingdom has refused to cut its oil production, and this has directly led to lower prices on world markets.

3- Canada :
Canada exports most of its oil to its southern neighbor; The United States of America and Europe. Canada is the largest foreign oil supplier to the United States of America