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现代地质 ›› 2020, Vol. 34 ›› Issue (06): 1103-1109.DOI: 10.19657/j.geoscience.1000-8527.2020.083

• 石油地质学 •    下一篇

塔里木盆地塘北断裂带分段变形及其活动特征

余一欣1,2(), 张立伟3, 朱秀香4, 罗吉1,2, 刘士林3, 张仲培3, 金峰1,2   

  1. 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
  • 收稿日期:2020-01-20 修回日期:2020-05-07 出版日期:2020-12-22 发布日期:2021-01-16
  • 作者简介:余一欣,男,副教授,1977年出生,构造地质学专业,从事含油气盆地构造地质分析方面的教学和研究工作。Email:yuxin0707@163.com
  • 基金资助:
    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)

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

YU Yixin1,2(), ZHANG Liwei3, ZHU Xiuxiang4, LUO Ji1,2, LIU Shilin3, ZHANG Zhongpei3, JIN Feng1,2   

  1. 1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
    2. College of Geosciences, China University of Petroleum, Beijing 102249, China
    3. Research Institute of Petroleum Exploration and Development, SINOPEC, Beijing 100083, China
    4. SINOPEC Northwest Oilfield Company, Urumqi, Xinjiang 830011, China
  • Received:2020-01-20 Revised:2020-05-07 Online:2020-12-22 Published:2021-01-16

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。

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

Abstract:

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.

Key words: Tangbei fault zone, fault-related fold, segmentation, growth index, hydrocarbon accumulation

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