Ayn Dar Oil Field is situated west of Abqaiq City in the Eastern Province of the Kingdom of Saudi Arabia. It was discovered by the Saudi Arabian Oil Company 'Saudi Aramco,' which began using a drilling rig for Ayn Dar Well No. (One) on April 10, 1948. On July 22, 1948, the company confirmed the presence of large quantities of oil at a depth of two km in the Arab Zone 'D' of the field. Subsequently, a second well was drilled five km south of the first well.