天然气地球科学

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鄂尔多斯盆地东南部延长组长7段泥页岩储层特征

王香增,刘国恒,黄志龙,孙兵华,史鹏,杨潇   

  1. 1.陕西延长石油(集团)有限责任公司,陕西 西安 710000;
    2.中国石油大学油气资源与探测国家重点实验室,北京 102249
  • 收稿日期:2014-09-17 修回日期:2015-01-02 出版日期:2015-07-10 发布日期:2015-07-10
  • 通讯作者: 刘国恒(1988-),男, 山东东营人,博士研究生,主要从事油气藏形成与分布研究.E-mail:liuguoheng123@126.com.
  • 作者简介:王香增(1968-),男,河南滑县人,教授级高级工程师,博士,主要从事油气田勘探开发研究. E-mail:sxycpcwxz@126.com.
  • 基金资助:

    陕西省科技统筹创新工程计划项目(编号:2012KTZB03-03)资助.

The Characteristics of Shale Reservoir of the No.7 Members in Yanchang Formation of Southeast Ordos Basin

WANG Xiang-zeng,LIU Guo-heng,HUANG Zhi-long,SUN Bing-hua,SHI Peng,YANG Xiao   

  1. 1.Yanchang Oil Co.Ltd.,Xi′an 710000,China;2.State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum,Beijing 102249,China
  • Received:2014-09-17 Revised:2015-01-02 Online:2015-07-10 Published:2015-07-10

摘要:

通过孔隙度、脉冲渗透率、全岩X-射线衍射、扫描电镜等实验手段,对延长组长7段陆相泥页岩储层特征进行了研究。实验分析表明,陆相泥页岩储层具有低孔低渗特征,有机质丰度高,但有机质演化程度低,有机质孔隙不发育。黏土矿物含量高,以伊/蒙混层为主,伊/蒙混层间层比为15%。储集空间以微孔隙和微裂缝为主。储集物性与石英含量正相关。泥页岩储层中高的黏土矿物是造成储层物性差的重要原因,因此石英含量尤为重要,不仅有利于增加储集空间,也有利于储层压裂改造。

关键词: 鄂尔多斯盆地, 延长组, 陆相泥页岩储层, 储集空间, 扫描电镜, 石英含量

Abstract:

Based on the experimental analysis of porosity,pulse permeability,X-ray diffraction of rock minerals,scanning electron microscopy,the characteristics of terrestrial mud shale reservoir of the No.7 members of Yanchang Formation was researched in Ordos Basin.The results show that shale in Yanchang Formation contains rich organic matter with the characteristic of low porosity,permeability and thermal maturity.Organic matter pores are rarely seen.The illite-smectite mixed layer is the main part of clay minerals with smectite-illite ratio of 15%.Macro pores and macro-fissures are the main reservoir spaces.Reservoir physical property has positive correlation with the amount of quartz.High content of clay minerals is the main cause for the low porosity of shale reservoir.Therefore,quartz is important for reservoir space broadening and reservoir fracturing.

Key words: Ordos Basin, Yanchang Formation, Terrestrial mud shale reservoir, Reservoir space, Scanning electron microscopy, Quartz content

中图分类号: 

  • TE122.1+1

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