Top Ten Biggest Oil and Gas Companies in the World 1. Sinopec. Sinopec Limited, also referred to as China Petroleum & Chemical Corporation Limited, 2. China National Petroleum Corp. (PetroChina) CNPC is the government-owned parent company 3. Royal Dutch Shell. The company we know today as While Saudi Arabia's national oil company, Saudi Aramco, remains the world's undisputed production leader, Western and Russian companies have added far more production over the past few years. The The United States, China, and India are the top consumers of oil products in the world with a share of world’s total of 20%, 13%, and 4% respectively. Oil includes crude oil, all other petroleum liquids, and biofuels. Let’s have a look at full list of top oil producing countries in the world below.