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济阳坳陷惠民凹陷夏口断裂带的分段性及其成因机制
投稿时间:2018-03-23  修订日期:2018-09-11  点此下载全文
引用本文:王迪,吴智平,李伟,刘华,李趁义,张耀.2018.济阳坳陷惠民凹陷夏口断裂带的分段性及其成因机制[J].地质论评,64(6):1356-1364,[DOI]:.
WANG Di,WU Zhiping,LI Wei,LIU Hua,LI Chenyi,ZHANG Yao.2018.Segmentation Characteristics and Genetic Mechanism of Xiakou Fault Zone in Huimin Sag, Jiyang Depression[J].Geological Review,64(6):1356-1364.
DOI:
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作者单位E-mail
王迪 1) 中国石油大学(华东)地球科学与技术学院山东青岛266580 jerry-di@163.com 
吴智平 1) 中国石油大学(华东)地球科学与技术学院山东青岛2665802) 青岛海洋科学与技术国家实验室山东青岛266235 wuzp@upc.edu.cn 
李伟 1) 中国石油大学(华东)地球科学与技术学院山东青岛266580  
刘华 3) 中石化有限公司胜利油田分公司山东东营257015  
李趁义 3) 中石化有限公司胜利油田分公司山东东营257015  
张耀 1) 中国石油大学(华东)地球科学与技术学院山东青岛266580  
基金项目:本文为国家重大专项(编号:2016ZX05006 007 001)和中石化重大科技攻关项目(编号:30200018 17 ZC0613 0019)的成果。
中文摘要:本文运用丰富的三维地震资料,通过对夏口断裂带几何学特征及其生长过程分析,揭示了其发育演化的分段性和阶段性,并就成因机制进行了探讨。结果表明:夏口断裂带是由NE走向与EW走向交替出现的4个分段连接而成的锯齿状断裂带,受区域地质背景及断裂发育的力学机制控制,其演化过程可划分为4个阶段;孔店组沉积期仅NE向的第一、三(西段)、四段活动,EW向的第二段、第三段的东段尚未开始活动,整个夏口断裂带处于分段独立发育阶段,尚未整体连接;沙四段沉积期随着区域拉张应力开始由NW—SE向近S—N向的转变,先期NE向断层段持续活动,且在侧接带位置形成的转换斜坡上开始发育近EW向断层段,各NE向断层段间发生软连接;沙三段沉积期在近S—N向的强烈拉张作用下,夏口断裂带发生硬连接,不同走向的各分段断层连接成一整体,形成NE向与EW向交替出现的锯齿形断裂带;沙二段到东营组沉积期为走滑改造作用阶段,在夏口断裂带不同位置发育有帚状构造、走滑双重构造,并在断裂带不同的弯曲段走滑派生出局部的拉张或挤压,体现了拉张背景下的走滑叠加效应。夏口断裂带发育演化的时空差异对于该地区沉降中心、物源通道的分布具有重要的控制作用。
中文关键词:夏口断裂带,分段发育,成因机制,惠民凹陷
 
Segmentation Characteristics and Genetic Mechanism of Xiakou Fault Zone in Huimin Sag, Jiyang Depression
NameInstitution
WANG Di1)School of Geosciences, China University of Petroleum, Qingdao, Shandong, 266580
WU Zhiping1)School of Geosciences, China University of Petroleum, Qingdao, Shandong, 266580;2)Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, 266235
LI Wei1)School of Geosciences, China University of Petroleum, Qingdao, Shandong, 266580
LIU Hua3)Shengli Oil field Company, SINOPEC, Dongying, Shandong, 257015
LI Chenyi3)Shengli Oil field Company, SINOPEC, Dongying, Shandong, 257015
ZHANG Yao1)School of Geosciences, China University of Petroleum, Qingdao, Shandong, 266580
Abstract:Objectives: Xiakou fault zone is a boundary fault in the south of Linnan sag, which controls stratum distribution and hydrocarbon migration. However, its genetic mechanism is still unclear. Methods: Based on abundant 3D seismic data, analysis of the geometric and growth process of the Xiakou fault zone, the segmentation and periodicity of its development and evolution are revealed and discuss the genetic mechanism. Results: The results show that Xiakou fault zone is a serrated fault zone and formed by the four segments connecting the NE strike and the EW direction alternately. The evolution process can be divided into four stages under the control of the regional geological. Ek stage only have NE- trending segments activities(first, third(western) and fourth), and the EW- trending (second and third(eastern))has not developed. The Xiakou fault zone is in independent growth stage. Es4 stage with the transformation of regional stress from NW—SE to near S—N, NE trending segments continue activity and EW- trending fault start activity. Soft connection happend between NE- trending segments. Es3 stage under the strong tensile action of S—N direction, hard connection occurred in the Xiakou fault zone.The segmented faults in different directions are connected to a whole, forming a serrated fault zone that occurs alternately between NE- trending and EW- trending. Es2—Ed is the stage of strike- slip transformation. Broom structures and strike- slip duplex developed in different positions. And produce local tension or extrusion on the different bending segments. It reflects the superposition effect of strike- slip under extension background. Conclusions: The spatial and temporal difference of the development and evolution of the Xiakou fault zone has an important control effect on the distribution of the settlement center and the source channel in this area.
keywords:Xiakou Fault Zone, segmental development, genetic mechanism, Huimin Sag
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