supergiant oil field

A supergiant oil field is defined as a petroleum reserve containing 1 billion or more barrels of ultimately recoverable oil. While most oil fields are small, a few large fields, including supergiants, hold a significant portion of the world's discovered oil. Fewer than 40 supergiant fields have been found globally, yet they originally contained about half of all discovered oil. The Arabian-Iranian sedimentary basin near the Persian Gulf holds the majority of these supergiant fields. Other supergiant fields are located in the United States, Russia, Mexico, Libya, Algeria, Venezuela, China, and Brazil. Giant fields, which include supergiants, account for 80 percent of the world's known recoverable oil.1