基于四川盆地西北部周缘野外露头、钻井与地震资料综合分析,系统论述该区晚震旦世—早古生代构造演化特征,分析其油气地质意义,指出近期有利勘探方向。晚震旦世—早古生代该区主要经历3期构造演化:1晚震旦世—早寒武世早期,受区域拉张作用影响,形成近南北向展布两期陆内裂陷和灯影组两期台缘;2早寒武世中期—中奥陶世,受西北部碧口古陆多期隆升作用影响,该区发生强烈剥蚀,西北部强于东南部;3晚奥陶世—志留纪末,受广西运动挤压作用影响,该区再次发生强烈剥蚀,西南部强于东北部。晚震旦世—早寒武世早期,陆内裂陷的形成控制了灯影组两期台缘丘滩相储集层与下寒武统优质烃源岩的发育;早寒武世中期,碧口古陆的隆升控制了孔明洞组颗粒滩相储集层围绕古陆周缘的分布。研究区纵向上应选择灯四段与孔明洞组作为主要勘探目的层,平面上九龙山构造圈闭与油气运聚期相匹配,是近期最为有利勘探区带。 Based on the comprehensive analysis of outcrops, drilling and seismic data in the peripheral margin of the northwestern part of the Sichuan Basin, the tectonic evolution characteristics of the Late Sinian to Early Paleozoic in the area are systematically analyzed. Their geological significance is analyzed, and the recent favorable prospecting directions are pointed out. Late Sinian - Early Paleozoic Three main tectonic evolutions took place in this area. During the late Sinian-Early Cambrian period, the two regions of inland rifting and the Dengying Group 2 Late Cretaceous; 2 Middle Cambrian-Middle Ordovician, strongly influenced by multi-stage uplift of Bikou ancient land in Northwest China, strongly denuded in the northwestern part, At the end of Silurian, influenced by the squeezing of Guangxi movement, the area suffered strong erosion again, with the southwestern part being stronger than the northeast part. During the Late Sinian-Early Cambrian period, the formation of intracontinental rifting controlled the development of both the marginal margin pools and the Lower Cambrian source rocks in the Dengying Formation. In the middle of the Early Cambrian, The uplifting of the ancient clumps controlled the distribution of the particle-beach facies reservoirs in the Kongmingdong Formation around the periphery of the ancient continent. In the study area, the Shanyuan and Kongmingdong formations should be selected as the main exploration target in the vertical direction. The Jiulongshan structural trap in the plane is matched with the hydrocarbon migration and accumulation period, which is the most favorable prospecting zone in the near future.