多期叠合盆地的主要特征是盆地经历了多个演化阶段 ,并且在不同演化阶段中具有不同的盆地类型和性质。对中国西北塔里木和柴达木盆地进行了多期叠合盆地油气运聚研究。这两个盆地自震旦纪以来经历了震旦纪中泥盆世、晚泥盆世三叠纪和侏罗纪第四纪等 3个开合旋回 ,在演化过程中出现由海向陆的转化和拉张 -挤压的交替转化 ,形成了油气来自多源、油气形成多期、油气运移多方向、油气聚集多场所的油气运聚特征。多期叠合盆地有 3种基本油气运聚模式 :①放射状运移、环状聚集模式 ,以柴达木盆地西部环英雄岭构造带为代表 ,油气运移方向垂直于构造等高线的方向 ;②前陆油气运聚模式 ,以塔里木盆地库车坳陷为代表 ,油气运移方向平行于造山带挤压应力方向 ;③古生代海相克拉通盆地油气运聚模式 ,油气沿大型断裂带和区域性不整合面运移和聚集 The main feature of the multistage superimposed basin is that the basin has undergone several evolutionary stages and has different basin types and properties in different evolution stages. Hydrocarbon migration and accumulation were studied in Tarim and Qaidam basins in northwestern China. Since the Sinian, these two basins have undergone three cycles of Cenozoic Devonian, Late Devonian Triassic and Jurassic Quaternary, during the evolution from sea to land Transformation and stretching - extrusion alternating transformation, the formation of a multi-source oil and gas, oil and gas formation of multi-period, multi-directional migration of hydrocarbons, oil and gas accumulation of multi-site hydrocarbon migration and accumulation characteristics. There are three basic patterns of hydrocarbon migration and accumulation in the multi-stage superimposed basins: (1) radial migration and ring-shaped accumulation, represented by the Yingjiongling structural belt in the west of the Qaidam Basin, where the direction of hydrocarbon migration is perpendicular to the direction of the tectonic contour line ; ② The pattern of oil and gas migration and accumulation in the foreland is represented by the Kuqa Depression in the Tarim Basin. The migration direction of oil and gas is parallel to the compressional stress direction of the orogenic belt. ③ The mode of hydrocarbon migration and accumulation in the Paleozoic craton basin, along with the large- Regional unconformity migration and accumulation