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Saudi Arabian Oil Company, most popularly known just as Aramco (formerly Arabian-American Oil Company) is a Saudi Arabian national petroleum and natural gas company based in Dhahran. Saudi Aramco's value has been estimated at anywhere between US$1.25 trillion and US$10 trillion, making it the world's most valuable company.
Saudi Aramco has both the world's largest proven crude oil reserves, at more than 260 billion barrels (4.1×1010 m3), and largest daily oil production. Saudi Aramco owns, operates and develops all energy resources based in Saudi Arabia. According to 2015 Forbes report, Aramco is said to be the world's largest oil and gas company.
Headquartered in Dhahran, Saudi Arabia, Saudi Aramco operates the world's largest single hydrocarbon network, the Master Gas System. Its 2013 crude oil production total was 3.4 billion barrels (540,000,000 m3), and it manages over 100 oil and gas fields in Saudi Arabia, including 288.4 trillion standard cubic feet (scf) of natural gas reserves. Saudi Aramco operates the Ghawar Field, the world's largest onshore oil field, and the Safaniya Field, the world's largest offshore oil field.