准噶尔盆地东部白垩系成藏条件及勘探前景分析

准东探区白垩系油气主要受阜康凹陷侏罗系烃源岩的控制 ,平面上主要沿阜康凹陷周边分布 ,纵向上油气主要分布在白垩系中下部。白垩系构造面貌是由南西向北东方向抬升的大斜坡 ,构造圈闭不发育。沉积相研究结果表明有利的相带主要集中在五彩湾凹陷—沙丘河、北三台地区 ,而该地区油气的保存条件相对较差。综合分析认为北三台西斜坡—阜康断裂带西段是准东白垩系今后的主要勘探目标区

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 .