Abstract: There is an oil-rich Kewu province in the northwestern margin of the Jungger Basin, The Kewu petroliferous province is an oil-accumulated zone of a large fault consisting of three subfaults of Chehong, Kewu, and Wuxia. The main source rocks in the Kelamaii petroliferous province are attributed to Permian System, and the source is derived from Mahu Lake Depression. Generally, the oil-gas migration occurred during the peried of Indosinian Movement, and the unconformities of Permo-Carboniferous and Permian-Triassic played a significant role in the oil-migration and accumulation from the depression to the margin of the basin.