Petroleum geologic characteristics and exploration strategy in wulungu depression of junggar basin

The stratum in Wulungu depression was formed by Carboniferous,Triassic,Jurassic and Cretaceous.Three source rocks were developed in Jurassic, Triassic and Carboniferous. Volcanic rock in Carboniferous and clastic rock in Jurassic are the main prospecting targets.Thick mudstones developed in Cretaceous and Triassic are two regional cap rocks in this area. Source rocks in Jurassic and Triassic began to generate hydrocarbons in the end of Jurassic, and the source rock in Carboniferous entered the windows in the end of Triassic.The faults and unconformities are the favorable migration pathways in this area.Traps which were near the deep fault belt and the unconformity of Cretaceous are the primary target for oil and gas exploration.