江汉盆地西北部构造变形特征与油气勘探  

Structural deformation characteristics and oil and gas exploration in northwest Jianghan Basin,China

作　　者：周卓明 邓铭哲 ZHOU Zhuoming;DENG Mingzhe(Wuxi Research Institute of Petroleum Geology,SINOPEC,Wuxi 214151,China)

机构地区：[1]中国石化石油勘探开发研究院、无锡石油地质研究所,江苏无锡214151

出　　处：《成都理工大学学报（自然科学版）》2023年第1期1-14,共14页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家自然科学基金企业创新发展联合基金项目(U19B6003-01)。

摘　　要：针对江汉盆地西北侧宜昌斜坡页岩气的接替勘探领域尚不明确的问题,开展江汉盆地西北部页岩气成藏地质条件研究。对江汉盆地西北部最新的地震剖面进行了解释,分析了区域构造变形模式,探讨了晚侏罗世南、北向挤压和白垩纪伸展作用对盆地的改造过程。结果表明,在晚侏罗世挤压变形期,雪峰陆内变形系统前缘的构造变形以基底物质堆叠引起的地层倾伏为主要特征,秦岭-大别造山带前缘的变形叠加于雪峰陆内变形系统的变形之上,以形成上冲断裂和褶皱变形为主要特征;白垩纪江汉盆地西北部的伸展变形具有不连续性,在早白垩世晚期晚阶段、晚白垩世早期晚阶段、晚白垩世晚期晚阶段发生了伸展变形的停滞和构造反转。沿江汉盆地西北缘延伸至雪峰陆内变形系统前缘的广大区域,具有受构造变形影响小且连续分布的志留系泥页岩层,具有页岩气勘探的潜力。This paper studies the reservoir-forming geological conditions of shale gas in the northwest of Jianghan Basin in order to solve the problem of shale gas replacement exploration field in the Yichang slope,northwest of Jianghan Basin.Based on the latest seismic profile interpretation,the tectonic deformation model of the study area is analyzed,and the transformation process of the basin by the late Jurassic south-north compression and Cretaceous extension is discussed.The results show that during the late Jurassic compressive deformation period,the tectonic deformation of the front of the Xuefeng intracontinental deformation system was mainly characterized by the stratum tilting caused by the stacking of basement materials,and the deformation of the front of the Qinling-Dabie orogenic belt was superimposed on the deformation of the Xuefeng intracontinental deformation system,which was mainly characterized by the formation of overthrusting fault and fold deformation.The extensional deformation of the northwest Jianghan Basin in Cretaceous is discontinuous,and the stagnation of extensional deformation and tectonic inversion occurred in the late stage of the late Early Cretaceous,the late stage of the early Late Cretaceous,and the late stage of the late stage of Late Cretaceous.The extensional deformation extended along the northwest margin of the Jianghan Basin to the large area of the front of the Xuefeng intracontinental deformation system,forming Silurian shale strata with continuous distribution and little influence of tectonic deformation,and creating a potential area for shale gas exploration.

关 键 词：江汉盆地 构造地质特征 伸展变形 页岩气勘探 

分 类 号：TE122.321[石油与天然气工程—油气勘探]