Ghawar Oil Field , the largest conventional oil field in the world, is located in Al-Ahsa Governorate in the Eastern Province of the Kingdom of Saudi Arabia , 100 km away from Dharan. The latter is the headquarters of the Saudi Arabian Oil Company ( Aramco ), which is the world's largest oil producing company, and the one accountable for all production and development in Ghawar Field. Production history of Ghawar Field The discovery of this field dates back to 1948, ten years after oil flo...