塔里木盆地柯坪断隆早古生代断裂构造特征:以柯坪南地区为例  

Fault Structural Characteristics of the Early Paleozoic in the Keping Fault-Uplift,Tarim Basin:A Case Study in the Southern Keping Area

作　　者：姜鹍鹏 刘亚雷 周新桂 刘成鑫[4] 成艳 段野 白忠凯 张远银 苗苗青[1,2,3] JIANG Kunpeng;LIU Yalei;ZHOU Xingui;LIU Chengxin;CHENG Yan;DUAN Ye;BAI Zhongkai;ZHANG Yuanyin;MIAO Miaoqing(Oil and Gas Survey Center,China Geological Survey,Beijing 100083,China;The Key Laboratory of Unconventional Petroleum geology,China Geological Survey,Beijing 100029,China;National Key Laboratory of Continental Shale Oil,Beijing 100083,China;Xinjiang Shenneng Petroleum Co.Ltd.,Keping,Xinjiang 843600,China)

机构地区：[1]中国地质调查局油气资源调查中心,北京100083 [2]中国地质调查局非常规油气地质重点实验室,北京100029 [3]多资源协同陆相页岩油绿色开采全国重点实验室,北京100083 [4]新疆申能石油天然气有限公司,新疆柯坪843600

出　　处：《现代地质》2024年第5期1248-1257,共10页Geoscience

基　　金：中国地质调查局项目“西部重点盆地油气地质调查与评价”(DD20240044)、“鄂尔多斯盆地及周缘油气地质调查与评价”(DD20240049)和“全国油气基础地质调查”(DD20240052)

摘　　要：柯坪断隆位于塔里木盆地西北缘,早期由于三维地震资料匮乏,没有发现早古生代的断裂构造。本文以柯坪南地区为例,基于最新采集的三维地震资料,从几何学、运动学和动力学等方面对柯坪断隆早古生代断裂构造进行了系统研究,认为柯坪南地区早古生代断裂构造发育,以中寒武世盐岩为滑脱面,分为盐上及盐下两套构造变形层。盐下构造层以早期基底卷入变形为主,断裂形成时间为奥陶纪末—志留纪初,该期断裂控制早期北西向构造的展布。盐上构造层受喜山期构造影响,以中寒武世盐岩层为滑脱面,盖层滑脱作用对早期构造有所改造,但部分早期原生构造仍得以保留。中寒武世盐岩滑脱面以下未被后期构造运动破坏的原生构造为该地区下步油气资源勘探最有利的目标。Keping Fault Uplift is located in the northwest margin of the Tarim Basin.Some Early Paleozoic fault structures remain uncharacterized due to the lack of 3D seismic imaging tecniques.In this study,we use the southern Keping area as a case study.The Early Paleozoic fault structures of the Keping Fault Uplift were systematically characterilized based on detailed interpretation of newly acquired 3D seismic data,focusing on geometry,kinematics,and dynamics.We found that the Early Paleozoic fault structures developed in the southern Keping area.The middle Cambrian salt rock acts as the slip surface,dividing the structures into two sets of tectonic deformation layers:the upper and lower salt layers.The pre-salt was predominantly affected by early basement deformation.The fault formed from the end of the Ordovician to the beginning of the Silurian and controlled the distribution of the early NW-trending anticlines.The upper salt layer was influenced by Himalayan tectonic movements,with the cap slip tectonic activity using the middle Cambrian salt rock as the detachment surface.Although the earlier formed anticlines were reformed,and original primary anticlines have been preserved.Primary traps located below the detachment plane of the middle Cambrian salt rock,which were not disrupted by later tectonic movements,are the most promising targets for further exploration.

关 键 词：早古生代 断裂构造 后期改造 原生构造 柯坪断隆 

分 类 号：P618.1[天文地球—矿床学] TE122.1[天文地球—地质学]