天然气地球科学 ›› 2012, Vol. 23 ›› Issue (3): 501–507.doi: 10.11764/j.issn.1672-1926.2012.03.501

• 天然气地质学 • 上一篇    下一篇

川西前陆盆地中段须家河组二段储层储集空间特征及演化

 肖艳, 彭军, 张纪智, 罗文军, 刘焕   

  1. 西南石油大学资源与环境学院,四川 成都 610500
  • 收稿日期:2012-03-01 修回日期:2012-04-05 出版日期:2012-06-10 发布日期:2012-06-10
  • 通讯作者: 肖艳530685075@163.com. E-mail:530685075@163.com.
  • 作者简介:肖艳(1987-),女,江苏泰州人,硕士研究生,主要从事储层地质学研究.E-mail:530685075@163.com.
  • 基金资助:

    中国石油科技创新基金“川西前陆盆地中段须家河组优质储层形成的成岩机制研究”项目(编号:2010D-5006-0103)资助.

Reservoir Spaces of the Second Section of Xujiahe Formation and Evolution in Middle Part of West Sichuan Foreland Basin

 XIAO  Yan, PENG  Jun, ZHANG  Ji-Zhi, LUO  Wen-Jun, LIU  Huan   

  1. College of Resource and Environment,Southwest Petroleum University,Chengdu 610500,China
  • Received:2012-03-01 Revised:2012-04-05 Online:2012-06-10 Published:2012-06-10

摘要:

川西前陆盆地中段上三叠统须家河组二段(须二段)储层普遍为超致密储层。通过显微镜下观察、阴极发光分析、扫描电镜分析等发现,储集空间以各类次生孔隙为主,微裂缝和少量残余原生孔隙次之。储集空间的发育受控于复杂而强烈的成岩变化,早期绿泥石的形成、多期次的溶蚀作用、与不整合相关的差异压实作用对储集空间发育起建设性控制作用。根据储层成岩矿物形成的时间及对孔隙度破坏以及次生孔隙形成的定量统计表明,目前该区砂岩已达到中成岩B期,储集空间主要经历了早成岩阶段压实作用对原生孔隙的破坏,中成岩阶段A期油气大量进入储层时酸性水溶蚀形成次生孔隙,以及其后成岩阶段中碳酸盐胶结和硅质胶结对次生孔隙的破坏3个阶段。

关键词: 川西前陆盆地, 须二段, 储集空间, 主控因素, 孔隙演化

Abstract:

The second section of upper Triassic Xujiahe Formation reservoir in the middle part of west Sichuan foreland basin is generally super\|tight. By means of the microscope,cathodoluminescence,scanning electron microscopy,the reservoir spaces mainly consist in the secondary porosity,micro-cracks and little residual primary porosity. The development of reservoir space is controlled by the complex and strong diagenetic processes,in which formation of early chlorite,multiphasic dissolution,and unconformity-related differential compaction play a constructive control role in the development of reservoir spaces. According to diagenetic mineral formation time and quantitative statistic on original pore loss and secondary porosity,the sandstone of this area has been in the middle diagenetic stage B. The reservoir space experienced three stages: destruction of primary porosity caused by compaction in the early diagenetic  stage,secondary porosity created by acidic water dissolution in the middle diagenetic stage A while the oil and gas poured into the reservoirs,and destruction of secondary porosity caused by the cementation of carbonate cements and siliceous in the subsequent diagenetic stages.

Key words: West Sichuan foreland basin, Second section Xujiahe Formation, Reservior space, Main controlling factors, Porosity evolution.

中图分类号: 

  • TE122.2

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