季节性三角洲是在陆相盆地中由季节性河流控制形成的三角洲沉积体系。现代季节性三角洲主要发育在地形平缓的干旱-半干旱气候环境中，然而在古代沉积记录中季节性三角洲的沉积模式研究仍然不够深入。选取塔里木盆地塔北地区苏维依组作为研究对象，基于研究区63口测录井资料及215.52 m岩心资料，建立不同沉积微相的测井相模板及岩相类型组合模板，分析总结沉积相平面特征的垂向演化规律，建立研究区整体的沉积模式。结果表明塔北地区苏维依组发育4大类、17小类岩相类型，苏维依下段沉积时期，研究区发育南北两侧不断退积的季节性浅水辫状河三角洲；苏维依上段沉积时期研究区北侧发育多洪水事件且向后退积的季节性浅水曲流河三角洲。最后建立了季节性浅水三角洲受可容纳空间、沉积基准面频繁变化和突发性事件等因素影响的剖面及单井沉积模式。研究成果为深入理解干旱气候背景下的季节性浅水三角洲沉积模式提供了参考，也可以为岩性圈闭勘探提供地质依据。

Seasonal deltas are deltaic sedimentary systems controlled by seasonal rivers in continental basins. Modern seasonal deltas are mainly developed in arid and semi-arid climate with gentle topography. However, the study on the sedimentary model of seasonal deltas in ancient sedimentary records is still insufficient. Suweiyi Formation in Tabei area, Tarim Basin was selected as the research object. Based on 63 logging data and 215.52 m core data in the study area, logging facies templates of different sedimentary microfacies and lithofacies type combination templates were established, and the vertical evolution law of sedimentary facies plane characteristics was analyzed and summarized, and the overall sedimentary model of the study area was established. The results show that the Suweiyi Formation in Tabei area developed 4 categories and 17 subtypes of rock facies. During the depositional period of the lower Suweiyi Member, seasonal shallow water braided river deltas were developed in the study area. A seasonal shallow meandering river delta with multiple flood events and retrograde accumulation developed in the north of the study area during the sedimentary period of the upper Suweiyi Member. Finally, the profile and single well sedimentary model of seasonal shallow water delta affected by factors such as accommodable space, frequent change of sedimentary base level and sudden events were established. The results provide a reference for further understanding of the seasonal shallow water delta depositional model under the background of arid climate, and also provide geological basis for lithologic trap exploration.