歧口凹陷张东地区沙河街组油气成藏条件与主控因素研究

歧口凹陷张东地区油气勘探工作开展较晚，通过基础地质研究认为张东地区油气成藏条件优越。砂岩输导层、断层和不整合面三大输导体在研究区不同的构造位置相互交叉、叠置、连通构成了复杂多变的输导体系，进而控制了研究区油气聚集部位与油气藏的分布，而不同的沉积相带直接影响到储层物性的好坏，对油气富集高产具有决定作用。

Study on the conditions and controlling factors of petroleum accumulation in Shahejie Formation of Zhangdong area of Qikou Depression

Petroleum exploration of Zhangdong area started relatively late, and basic geological studies suggested that the conditions of petroleum accumulation of Zhangdong area were superior. There are three petroleum migration transportation systems including sandstone translocation layers, faults and unconformities. Cross-cutting, overriding, connecting of above mentioned 3 transportation systems in different structural locations in the study area has constituted a complex transportation system, and then control the petroleum accu- mulation and the distribution of reservoir. Different sedimentary facies controX the reservoir properties directly and have a decisive role on petroleum accumulation and productivity.