鄂西宜昌地区寒武系页岩孔隙结构特征及发育主控因素
作者:
作者单位:

作者简介:

李海(1988—),男,湖北潜江人,工程师,硕士,从事油气成藏机理和页岩气调查评价工作。联系电话:13477098048,E-mail:lihai6248592@163.com。

通讯作者:

基金项目:

国家科技重大专项“中扬子高演化页岩气赋存机理与富集规律研究”(2016ZX05034001-002)


Pore structure characteristics and development control factors of Cambrian shale in the Yichang area,western Hubei
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    通过低温液氮比表面积分析实验和扫描电镜观察,研究鄂西宜昌地区寒武系黑色页岩的储集空间类型和微 观孔隙结构,并结合总有机碳含量和矿物X衍射测试数据,对页岩孔隙发育主控因素进行分析。结果表明:研究区 水井沱组页岩的储集空间主要包括残余原生粒间孔、次生溶蚀孔、矿物铸模孔、晶间孔、微裂缝和有机孔,以微孔和 小孔为主;其中直径小于10 nm的孔隙对页岩比表面积的平均贡献率达87.51%,直径大于10 nm的孔隙对总孔隙体 积的平均贡献率为56.32%。页岩中的粘土矿物可以为页岩气的赋存提供更多的吸附点位和孔隙空间,且石英对页 岩孔隙发育具有正向作用,而碳酸盐岩含量过高则会导致孔隙结构的复杂化。

    Abstract:

    The reservoir space and microscopic pore structure of Cambrian black shales in the Yichang area of western Hubei were studied through the analysis of low-temperature liquid nitrogen adsorption and scanning electron microscopy. Besides,the main control factors of pore development of shale were determined based on experiment data of total organic carbon and X-ray diffraction. The results indicate that the storage space type of shale gas reservoir in the Shuijingtuo Formation are mainly residual intergranular pore,secondary dissolution pore,mineral moldic pore,intercrystal pore,microcrack and organic pore. Micropores and small pores are the main pores in shale. For pores with a diameter less than 10 nm,the average contribution rate to specific surface area can reach 87.51%,and for pores with a diameter more than 10 nm,the average contribution rate to pore volume is 56.32%. The clay minerals can provide more adsorption sites and pore space for shale gas occurrence in the shale of the study area. Quartz are favorable for shale pore development and the pore structure will become complex due to the high content of carbonate minerals.

    参考文献
    相似文献
    引证文献
引用本文

李海,刘安,罗胜元,陈孝红,陈林.鄂西宜昌地区寒武系页岩孔隙结构特征及发育主控因素[J].油气地质与采收率,2018,25(6):16~23

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2019-01-17