Five countries that get rich by oil?

Oil, also known as crude oil, is a brown-black flammable viscous liquid mined from deep underground. Mainly a mixture of alkanes, cycloalkanes and aromatics. It is a mixture formed by long-term evolution of organisms in ancient oceans or lakes, and it belongs to fossil fuels like coal. Saudi Arabia's economy is based on oil, and the government controls the main economic activities of the country. Saudi Arabia is the world's second largest oil reserve country after Canada (accounting for 24% of the world's total proven oil reserves), the world's largest oil exporter and a major member of the Organization of Petroleum Exporting Countries (OPEC). Kuwait is rich in oil and natural gas, with proven oil reserves of 96.8 billion barrels, accounting for 10.8% of the world's reserves, ranking fourth in the world. Burgen oil field in the south is one of the largest oil fields in the world. Natural gas reserves 1.498 trillion cubic meters, accounting for 1. 1% of the world's reserves. Oil is the main source of Kuwait's fiscal revenue and the pillar of the national economy, and more than 90% of its fiscal revenue comes from oil. Iraq is dominated by oil industry, and agriculture and animal husbandry also occupy an important position. The northern oil region exports crude oil to Mediterranean ports in Lebanon, Syria and Turkey through pipelines, and the southern oil field exports crude oil to Yanbu oil port on the Saudi Red Coast through pipelines. There are oil refining and petrochemical industries as well as textile, food, tobacco, cement and other industries. Irrigation agriculture in Lianghe Plain has a history of thousands of years. Iran's economy is dominated by oil exploitation, and Khuzestan is an oil industrial zone and an important seaport. It also develops oil refining and petrochemical industries, as well as steel, machinery and other industrial sectors. Rich in oil and natural gas resources. Oil is the lifeblood of the Iranian economy. At present, Iran is the second largest exporter of crude oil in the world. The proven oil reserves are 93 billion barrels, accounting for 10% of the world's total reserves, ranking fifth in the world. The UAE is mainly engaged in oil production and petrochemical industry. While developing the petrochemical industry, the government takes developing diversified businesses, expanding trade and increasing the proportion of non-oil income in GDP as its primary task, and strives to develop industries such as cement, aluminum smelting, plastic products, building materials, clothing and food processing, and attaches importance to the development of agriculture, animal husbandry and fisheries. Make full use of all kinds of financial resources, focus on developing cultural, educational and health undertakings, and continue to complete and expand existing projects under construction.