Oil fields are areas where crude oil is found beneath the Earth's surface. These fields are typically located in sedimentary rock formations, where organic materials have been buried and transformed over millions of years. Oil is extracted from these fields through drilling, which allows companies to access the valuable resource for energy production and other uses. The extraction process involves several steps, including drilling wells and pumping the oil to the surface. Once extracted, the crude oil is transported to refineries, where it is processed into various products like gasoline, diesel, and other petrochemicals. Oil fields play a crucial role in the global economy, providing energy and raw materials for countless industries.