Abstract: The systematic analysis is conducted of characteristics of effective source rock, reservoir rock and cap rock in Peacock river slope area of Tarim basin, based on its available exploratory data and petroleum geologic conditions. The petroleum system in it can be divided into Paleozoic Hercynian-Indonisian destructive type of petroleum system and Mesozoic Yanshan-Himalayan regenerative type of petroleum system. Also, the favorable belts for oil-gas prospecting are analyzed, according to its source rock conditions, relations of structure-source rock evolution as well as the trap and preservation status of oil-gas pools. It is concluded that Weimark-Kaiping structural belt and Longkou structural belt could be potential for hydrocarbon prospecting in this area.

Key words: Tarim basin, Kongquehe, petroleum system, source rock, structure, sedimentation