地球科学进展 ›› 2021, Vol. 36 ›› Issue (10): 1039 -1051. doi: 10.11867/j.issn.1001-8166.2021.075

能源地质进展 上一篇    下一篇

鄂尔多斯盆地古峰庄地区断裂特征及油气地质意义
杨丽华 1( ), 刘池洋 1( ), 代双和 2, 周义军 2, 毕明波 2, 刘永涛 1 , 2   
  1. 1.西北大学大陆动力学国家重点实验室,西北大学地质学系,陕西 西安 710069
    2.东方地球物理公司研究院长庆分院,陕西 西安 710021
  • 收稿日期:2021-04-30 修回日期:2021-07-10 出版日期:2021-10-10
  • 通讯作者: 刘池洋 E-mail:ylh0816@qq.com;lcy@nwu.edu.cn
  • 基金资助:
    国家自然科学基金重点项目“坳陷型富烃凹陷的主要特征和形成的动力学环境”(41330315);西北大学大陆动力学国家重点实验室科学技术部专项“南北构造带北段构造分区性及主要区段构造特征及演化”(201210142)

Fault Characteristics and Petroleum Geological Significance in the Gufengzhuang Area, Ordos Basin

Lihua YANG 1( ), Chiyang LIU 1( ), Shuanghe DAI 2, Yijun ZHOU 2, Mingbo BI 2, Yongtao LIU 1 , 2   

  1. 1.State Key Laboratory of Continental Dynamics,Department of Geology,Northwest University,Xi'an 710069,China
    2.Research Institute of Oriental Geophysical Company,Changqing Branch,Xi'an 710021,China
  • Received:2021-04-30 Revised:2021-07-10 Online:2021-10-10 Published:2021-11-19
  • Contact: Chiyang LIU E-mail:ylh0816@qq.com;lcy@nwu.edu.cn
  • About author:YANG Lihua (1996-), female, Zhucheng City, Shandong Province, Master student. Research areas include structural analysis and fracture characteristics of petroliferous basins. E-mail: ylh0816@qq.com
  • Supported by:
    the National Natural Science Foundation of China "The main characteristics of depression-type hydrocarbon-rich sags and the dynamic environment of formation"(41330315);The Ministry of Science and Technology of the State Key Laboratory of Continental Dynamics of Northwest University Tectonic Characteristics and Evolution of Main Sections Joint Funding(201210142)

开展断裂研究对认识盆地构造特征及演化、分析其对油气成藏的控制作用具有重要意义。以三维地震资料为主,应用多种方法和资料,对鄂尔多斯盆地西部古峰庄地区的断裂特征进行了系统研究,并结合钻探结果分析断裂对油气运聚成藏的控制作用。研究表明:古峰庄地区共发育北东东、北西和近南北向3组近直立、断距小、隐蔽性强的断裂,在空间上具有“纵向分层,带状分布”的特点;各组断裂的平面展布特征和剖面构造组合样式存在较大差异;3组微小断裂依次形成于燕山期右旋张性走滑、印支期左旋张性走滑和加里东期拉张背景;北西向断裂有利于油气运聚成藏,在断裂伴生圈闭、断裂强活动带、裂缝发育处三者耦合的部位是油气成藏的有利区。

Research on fault characteristics is of great significance for understanding the structural characteristics and evolution process of the Ordos Basin and analyzing its control effect on hydrocarbon accumulation. Taking Gufengzhuang area in the western Ordos Basin as the research object, the characteristics of faults are systematically studied by using 3D seismic data, and the control effect of faults on hydrocarbon migration and accumulation is analyzed combined with drilling data. It is found that the Gufengzhuang area has developed three groups of nearly upright, small fault distance and strong concealed fault zones, NEE, NW and near NS, which have the characteristics of "vertical stratification and zonal distribution" in space. There are great differences in the plane distribution characteristics and sectional structural combination styles of each group of faults.The three groups of micro faults were formed successively in Yanshanian dextral strike-slip background, Indosinian sinistral transtensional strike-slip background and Caledonian extensional background. NW faults are conducive to hydrocarbon migration and accumulation. The coupling part of the fault-associated trap, the strong active zone of the fault, and the fracture development site is a favorable area for hydrocarbon accumulation in the Gufengzhuang area.

中图分类号: 

图1 鄂尔多斯盆地构造单元区划和古峰庄地区位置图及地层柱状图
Fig. 1 Ordos Basin structural unit division and Gufengzhuang map and stratigraphic histogram
图2 古峰庄地区沿层切面(右列)和解释断裂(左列)平面图
Fig. 2 Plan view of the along-layer section right column and interpretation fault left column of Gufengzhuang area
图3 古峰庄地区断裂三维地震剖面图(剖面位置见图2
Fig. 3 3D seismic profile of fault in Gufengzhuang area profile position is shown in Fig. 2
图4 不同深度3组方向断裂数量统计对比图
Fig. 4 Comparison of the statistics of the number of fractures in three directions at different depths
图5 定边一华池地区(a)、姬塬-元城地区(b)下白垩统露头构造裂缝走向玫瑰花图 34 35
Fig. 5 Dingbian-Huachi area a), Jiyuan-Yuancheng area b Lower Cretaceous outcrop structure crack strike rose diagram 34 35
图6 古峰庄地区不同方向断裂应力作用示意图
Fig. 6 Schematic diagram of fracture stress in different directions of Gufengzhuang area
图7 古峰庄地区油气有利聚集区评价图(a)及过F1断裂不同部位三维地震剖面图(b)[剖面位置见图7a)]
Fig. 7 Evaluation map of favorable oil and gas accumulation areas in Gufengzhuang area a and 3D seismic cross-sections of different parts of the F1 fault b) [see Fig. 7a for the location of the cross-section
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