ocr: ABQAIQ I - HE - a (31 miles) ABQAIQ OIL southwest FIELD of is 50 Dhahran, km Saudi Arabia. Abqaiq's oil formed in layers of limestone about 150 million years ago. More than 60 wells reach over 2 km (114 miles) into the Earth's crust to recover the oil. Saudi Arabia has over one-quarter of the world's oil reserves. FIERY NIGHI This oil rig in Saudi Arabia is burning off Hn1 wanted naturalgas associated with the oil.