塔里木盆地塘北断裂带分段变形及其活动特征  

Segmented Deformation and Activity Characteristics of the Tangbei Fault Zone in the Tarim Basin

作　　者：余一欣[1,2] 张立伟 朱秀香[4] 罗吉 刘士林[3] 张仲培[3] 金峰 YU Yixin;ZHANG Liwei;ZHU Xiuxiang;LUO Ji;LIU Shilin;ZHANG Zhongpei;JIN Feng(State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249,China;College of Geosciences,China University of Petroleum,Beijing 102249,China;Research Institute of Petroleum Exploration and Development,SINOPEC,Beijing 100083,China;SINOPEC Northwest Oilfield Company,Urumqi,Xinjiang 830011,China)

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京)地球科学学院,北京102249 [3]中国石化石油勘探开发研究院,北京100083 [4]中国石化西北油田分公司,新疆乌鲁木齐830011

出　　处：《现代地质》2020年第6期1103-1109,共7页Geoscience

基　　金：国家重点研发计划项目(2017YFC0603105);中石化西北油田分公司科技项目(KY2019-S-099)。

摘　　要：位于塔里木盆地塘古孜巴斯坳陷北部的塘北断裂带具有多期构造叠加改造的变形特点,表明出明显的分段特征,并经历了复杂的形成演化过程。主要运用断层相关褶皱理论,并结合钻井资料,通过对地震剖面进行精细解释,分析了塘北断裂带的分段变形及其活动特征。结果表明:塘北断裂带主要发育滑脱逆冲断层和基底卷入逆断层,在断层上盘形成断层传播褶皱。依据断裂带的发育样式及其变形强度,沿断裂带走向可将其划分为西、中、东三段,变形强度自西向东逐渐减弱,逆冲角度逐渐变缓。塘北断裂带主要经历了加里东早期、加里东中期Ⅰ幕、Ⅲ幕以及加里东晚期—海西早期等4期构造活动。在加里东早期和加里东中期Ⅰ幕,塘北断裂带中段活动较强,向两侧减弱,之后断裂带的活动中心向西侧发生迁移。塘北断裂带的多期活动对圈闭形成、储层物性和油气运移等都产生了重要影响。The Tangbei fault zone is located in the northern Tangguzibasi sag, and has superimposing deformation features of segmented deformation and multi-stage activities. Based on defined interpretation of seismic profiles using fault-related fold theory and drilling data, this paper addresses the segmented deformation and activity characteristics of the Tangbei fault zone. The results show that detachment thrust faults and basement-involved thrust faults with fault propagation folds on hangingwall are well developed in the Tangbei fault zone. According to the shapes and deformation intensity, the Tangbei fault zone can be divided into three segments along strike, i.e.the western, central and eastern segments. From west to east, the deformation intensity and thrust angle decrease gradually. The Tangbei fault zone experienced four major tectonic activities in the Early Caledonian, the Middle Caledonian(phase Ⅰ and Ⅲ), and the Lately Caledonian-Early Hercynian. During the Early Caledonian and Middle Caledonian(phase Ⅰ), the middle segment was highly active, and the seismic center gradually shifted westward. The multi-stage activities of the Tangbei fault zone are crucial for the formation of trap and, reservoir properties, as well as hydrocarbon migration.

关 键 词：塘北断裂带 断层相关褶皱 分段性 生长指数 油气成藏 

分 类 号：TE121.2[石油与天然气工程—油气勘探]