An oil field is an area which has a large number of oil reservoirs from which crude oil can be tapped. These areas extend over vast areas. Since oil exploration and drilling requires up to several years before the oil is depleted, some regions are equipped with facilities like self-contained towns.

Most of the oil producing countries own large oil fields. The Ghawar oil field in Saudi Arabia is one of the largest oil fields in the world.

Bolivar Coastal- Venezuela.
Safaniya Khafji - Saudi Arabia.
Kirkuk, Rumailia – Iraq
Marun- Iran.
Chicontepec - Mexico.
Zakum- Abu dhabi, UAE are some of the largest oil fields in the world.