Tell el-'Oueili (also Tell el-âÂÂUwaili and Awayli); is an archaeological site in the ancient Near East, located in Dhi Qar Governorate, southern Iraq. It is located 3.5 kilometers southeast of the ancient site of Larsa. The site was excavated between 1976 and 1989 by French archaeologists under the direction of Jean-Louis Huot. The excavations have revealed occupation layers predating those of Eridu, making Tell el-'Oueili the earliest known human settlement in Lower Mesopotamia.
The site was first noted and surveyed by French scholar André Parrot, who at the time was working at nearby Larsa. Two small excavation seasons took place in 1976 and 1978, and regular excavations commenced in 1981. Four more seasons took place in every uneven year until 1989. All excavations were directed by French archaeologist Jean-Louis Huot.
After a long hiatus archaeological work has resumed at the site with excavations in 2019, 2021, and 2023.
The site measures in diameter and is approximately high. The environment of 'Oueili is characterized by temperatures that can reach more than 50ðC (122ðF) in summer and less than 250 mm of annual rainfall, making the area unsuitable for rainfed agriculture.
Tell el-'Oueili was occupied during the Ubaid period. The excavations have revealed occupation layers dating from Ubaid 0 (6500-5400 BCE) to Ubaid 4. The phase Ubaid 0 was first discovered at this site and was hence provisionally termed 'Oueili-phase. A surface survey showed that the site was occupied into the Uruk Period.