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天然气地球科学 ›› 2012, Vol. 23 ›› Issue (4): 797–803.doi: 10.11764/j.issn.1672-1926.2012.04.797

• 非常规天然气 • 上一篇    下一篇

黔北地区构造特征与下寒武统页岩气储层裂缝研究

久凯，丁文龙，李玉喜,张金川，曾维特   

  1. 1.中国地质大学（北京）能源学院，北京 100083;2.国土资源部油气资源战略研究中心，北京100034
  • 收稿日期:2012-03-16 修回日期:2012-05-03 出版日期:2012-08-10 发布日期:2012-08-10
  • 通讯作者: 久凯jiukai-9@163.com. E-mail:jiukai-9@163.com.
  • 作者简介:久凯（1986-），男，内蒙古包头人，博士研究生，主要从事石油构造分析与页岩裂缝研究.E-mail：jiukai-9@163.com.
  • 基金资助:

    国家自然科学基金项目（编号：41072098；41002072）；国家科技重大专项专题（编号：2011ZX05018-001-002；2011ZX05009-002-205）；全国油气资源战略选区调查与评价国家专项（编号：2009GYXQ-15）联合资助.

Structural Features in Northern Guizhou Area and Reservoir Fracture of Lower Cambrian Shale Gas

JIU Kai, DING Wen-long, LI Yu-xi, ZHANG Jin-chuan, ZENG Wei-te   

  1. 1.School of Energy Resources,China University of Geosciences,Beijing 100083,China;
    2.Oil and Gas Strategy Research Center,Ministry of Land and Resource,Beijing 100034,China
  • Received:2012-03-16 Revised:2012-05-03 Online:2012-08-10 Published:2012-08-10

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698

摘要：

裂缝发育程度是页岩气储层的主控因素之一，而裂缝的形成与构造特征密切相关。在对黔北地区构造特征分析的基础上，对该区下寒武统牛蹄塘组黑色页岩地层的裂缝特征及分布进行了研究。认为黔北地区褶皱、断裂发育复杂，褶皱整体以隔槽式为主，断裂是在多个走向断裂体系相互切割、联合下形成的，各断裂体系的主形成期具有差异性；构造裂缝是下寒武统黑色页岩层段的主要裂缝类型，而且以水平缝与低角度缝所占比例大。裂缝发育区的分布主要受到断裂带的控制，其中以北东向和北北东向断裂体系的控制作用最为显著，裂缝发育区多位于断裂带的末端、拐点处、不同走向断裂带相交处和相同走向的断层夹持带等应力集中部位。其次，在背斜的高陡部位，也有利于裂缝的形成。

关键词: 页岩气, 富有机质泥页岩, 下寒武统, 构造特征, 裂缝, 黔北地区

Abstract:

Fracture development is one of controlling factors for shale gas reservoir,while there is close correlation between fracture and structural characteristics.Based on structural characteristics in the northern Guizhou area,we discuss the fracture features and distribution of lower Cambrian black shale.In the northern Guizhou area,the folds are mainly trough-like,and the faults are formed under cut and joint of fault system in different directions.The main times of fault system with different trending direction are different.Structural fractures are the main fracture types of the black shale and the horizontal fractures and low-angle fractures are dominant.The  fracture-developed area is controlled by faults,especially NE- and NNE-striking faults.The fracture-developed areas are mainly lactated in end of the faults,inflection point,junction of different strike faults,and place between faults with similar striking orientation.Meanwhile,the steep part of anticline is also profitable to the fracture formation.

Key words: Shale gas, Organic-rich shale, Lower Cambrian, Structural feature, Fracture, Northern Guizhou area

中图分类号: 

  • TE132.2

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