ولاية ورقلة
Hassi Messaoud Oil Field is an oil field located in Ouargla Province. It was discovered in 1956 by S.N. REPAL and developed by Sonatrach. The oil field is operated and owned by Sonatrach. The total proven reserves of the Hassi Messaoud oil field are around 6.4 billion barrels (870×106tonnes), and production is centered on .