甘肃酒西白垩纪盆地是酒西含油气盆地的一个单型盆地 ,发育了冲积扇、水下重力流扇、扇三角洲、湖泊、河流沉积体系 ,并在湖盆演化的不同阶段分别形成冲积扇—扇三角洲—滨浅湖—砾质辫状河、近岸水下重力流扇—中深湖—扇三角洲、扇三角洲—中浅湖—河流沉积体系组合型式。依据等时界面 ,湖盆充填序列可划分为三个构造层序 ,相对应于初始裂陷、扩张裂陷—热衰减沉降、湖盆萎缩关闭三个演化阶段。研究证明 ,地幔热柱的形成和衰减、燕山运动等远程应力作用控制盆地的演化 The Cretaceous Basin in Jiuxi, Gansu is a single-type basin in the West Petroleum-bearing Basin. Alluvial fans, subaqueous gravity flow fans, fan delta, lakes and river sedimentary systems are developed. Alluvial fans are formed at different stages of the evolution of the lake basins - fan delta - shore shallow lake - gravel braided river, nearshore gravity flow fan - lake - fan delta, fan delta - lake - river sedimentary system combination type. According to the isochronous interface, the basin filling sequence can be divided into three tectonic sequences, which correspond to the three stages of the initial rifting, expansion rifting - thermal attenuation and sedimentation, and the atrophy of the lake basin. Studies have shown that the formation and attenuation of the hot mantle plume, the Yanshan movement and other remote stress control basin evolution