The Reservoir-Forming Conditions and Analyses of Cretaceous Exploration Prospect in the East of Junggar Basin

Oil in Cretaceous formation in the east of Junggar Basin is mainly controlled by hydrocarbon source rock in Jurassic in FuKang Sag , and the reservoir is mainly distributed in the edge of the sag in the middle-underlayer of Cretaceous formation. The structure of Cretaceous formation is a large slope with high point in the north-east and low point in the south-west, the structure trap developing not well in it . According to the research of sedimentary facies , the benefit facies belt mainly concentrate in the north area: WuCaiWan, ShaQiuHe and BeiSanTai Area, yet reservoir preservation condition here is relatively poor . After comprehensive analyses , we think the west slope area of BeiSanTai- FuKang fracture belt is a main target area to be explored in the east of Junggar Basin in Cretaceous formation .