柴达木盆地北部块断带圈闭特征与油气分布的有序性

柴达木盆地北部块断带圈闭的发育受构造与沉积的控制，古近纪只在隆起背景上继承性产生构造圈闭，而晚侏罗世-白垩纪、新近纪-第四纪大面积形成构造圈闹；同时，构造与沉积还控制圈闭的分布，表现为平面上分区成带，垂向上不同时期或同一时期不同类型的圈闭叠加。油气资源类型、成藏组合、保存及富集程度等方面与圈闭时空展布存在耦合，呈现出“断褶区聚气，山前、潜伏区聚油，凸起顶、凸起斜坡区油气并存”的基本卡占局和油气富集程度依次变好的序列。

Characteristics of Fault Block Traps and Sequence Property of Oil and Gas Distribution in North Qidam Basin

The growth of fault block traps in north Qidam Basin is controlled by structure and deposition. Tectonic traps are produced on the uplift in Palaeogene inheritedly and tectonic traps are produced extensively in late Jurassic-Cretaceous and Palaeo-Alluvium periods. At the same time, the distribution of traps are also controlled by the tectonics and deposition, that is the traps are distributed in zones on the plane, and traps of different types are superposed vertically at different stages or at the same stage. The type of hydrocarbon resources, accumulation assemblage, preservation and degree of enrichment are coupled with the spacetime distribution of traps, by which natural gas is accumulated in a faultage-anticline zone, oil is accumulated before hills or in the latent zone, and oil and gas are accumulated on swell top and swell slopes, where the degree of hydrocarbon enrichment is getting better orderly.