岩性油气藏 ›› 2019, Vol. 31 ›› Issue (5): 24–33.doi: 10.12108/yxyqc.20190503

• 油气地质 • 上一篇    下一篇

辽河坳陷西部凹陷沙四上亚段震积岩特征及地质意义

赵青峰1,2,3, 张建国1,2,3, 康文君1,2,3, 王思琦1, 姜在兴1, 杜克锋4, 黄昌武5   

  1. 1. 中国地质大学(北京)能源学院, 北京 100083;
    2. 海相储层演化与油气富集机理教育部重点实验室, 北京 100083;
    3. 国土资源部页岩气资源战略评价重点实验室, 北京 100083;
    4. 陕西延长石油(集团)有限责任公司 研究院, 西安 710075;
    5. 中国石油勘探开发研究院, 北京 100083
  • 收稿日期:2019-02-26 修回日期:2019-05-06 出版日期:2019-09-21 发布日期:2019-09-16
  • 第一作者:赵青峰(1998-),男,研究方向为储层沉积学。地址:(100083)北京市海淀区学院路29号。Email:zqf_1998@163.com
  • 通信作者: 张建国(1989-),男,博士,讲师,主要从事油气储层沉积学方面的教学和研究工作。Email:jianguozhangenergy@163.com。
  • 基金资助:
    国家自然科学基金“湖相富有机质泥页岩中的事件沉积作用”（编号：41772090）、中央高校基本科研业务费“济阳坳陷古近系湖相泥页岩的成因机制研究”（编号：53200759015）和“十三五”国家油气重大专项“深水细粒储集体形成机制与有利储层评价”（编号：2017ZX05009-02-04）联合资助

Characteristics of seismites and their geological significance of the upper fourth member of Shahejie Formation in Western Sag, Liaohe Depression

ZHAO Qingfeng1,2,3, ZHANG Jianguo1,2,3, KANG Wenjun1,2,3, WANG Siqi1, JIANG Zaixing1, DU Kefeng4, HUANG Changwu5   

  1. 1. School of Energy Resources, China University of Geosciences(Beijing), Beijing 100083, China;
    2. Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Enrichment Mechanism, Ministry of Education, Beijing 100083, China;
    3. Key Laboratory of Strategy Evaluation for Shale Gas, Ministry of Land and Resources, Beijing 100083, China;
    4. Research Institute of Yanchang Petroleum(Group) Company Limited, Xi'an 710075, China;
    5. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China
  • Received:2019-02-26 Revised:2019-05-06 Online:2019-09-21 Published:2019-09-16

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摘要： 为研究辽河坳陷西部凹陷沙四上亚段震积岩的发育特征及地质意义，开展了岩心观察与描述、薄片鉴定和古震级恢复等。结果表明：①西部凹陷沙四上亚段细粒沉积岩中发育大量液化脉、液化角砾、液化卷曲、环形层、丘槽、脉状构造、阶梯状断层等9种脆塑性变形构造。②研究区震积岩在垂向序列自下而上依次发育底部未震层段、液化流动层段、同沉积断层段、球枕构造和脉状构造层段、液化流动层段和顶部未震层段。③该套震积岩形成于5～8级的地震事件，其形成的微裂缝和断层为流体提供了有效渗流通道，且通道附近发育大量溶蚀孔隙，对研究区致密的细粒碳酸盐岩储层具有一定的改善作用。该研究成果为西部凹陷下一步油气勘探指明了新的领域和方向。

关键词: 震积岩, 古地震级别, 震积序列, 沙四上亚段, 西部凹陷, 辽河坳陷

Abstract: In order to study the development characteristics and geological significance of the seismites of the upper fourth member of Shahejie Formation in Western Sag of Liaohe Depression,core observation and description,thin section identification and restoration of paleo-magnitude were carried out. The results show that:(1) Nine kinds of brittle plastic deformation structures such as liquefied veins,liquefied breccia,liquefied crinkled deformation,annular bedding,mounds and troughs,vein structure and syn-sedimentary fault formed in the finegrained sedimentary rocks of the upper fourth member of Shahejie Formation in Western Sag.(2)vertical vibration sequence of the seismites in the study area from bottom to top is as follows:shattered rock bed,liquefied crinkled deformation interval,interval of syn-sedimentary fault,interval of ball-and-pillow structure and vein structure,liquefied crinkled deformation interval and normal homogenized overlying bed.(3)The paleo-magnitude restoration based on sedimentary structures shows that the set of seismites was formed in earthquake events on the Richter scale at magnitude 5-8. Micro-fissures and faults caused by seismic events provided effective seepage channels for hydrocarbon migration,and a large number of dissolved pores developed around the channel. It has a certain improvement effect on the dense fine-grained carbonate reservoir in the study area. The research results show new fields and directions for the next oil and gas exploration in the Western Sag.

Key words: seismites, paleo-earthquake magnitude, seismites sequence, upper fourth member of Shahejie Formation, Western Sag, Liaohe Depression

中图分类号: 

  • TE122.2
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