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    川西南部须二段低渗透砂岩储层裂缝类型及其形成序列

    曾联波 李跃纲 王正国 李梅

    曾联波, 李跃纲, 王正国, 李梅, 2007. 川西南部须二段低渗透砂岩储层裂缝类型及其形成序列. 地球科学, 32(2): 194-200.
    引用本文: 曾联波, 李跃纲, 王正国, 李梅, 2007. 川西南部须二段低渗透砂岩储层裂缝类型及其形成序列. 地球科学, 32(2): 194-200.
    CENG Lian-bo, LI Yue-gang, WANG Zheng-guo, LI Mei, 2007. Type and Sequence of Fractures in the Second Member of Xujiahe Formation at the South of Western Sichuan Depression. Earth Science, 32(2): 194-200.
    Citation: CENG Lian-bo, LI Yue-gang, WANG Zheng-guo, LI Mei, 2007. Type and Sequence of Fractures in the Second Member of Xujiahe Formation at the South of Western Sichuan Depression. Earth Science, 32(2): 194-200.

    川西南部须二段低渗透砂岩储层裂缝类型及其形成序列

    基金项目: 

    CNPC石油科技中青年创新基金项目 05E7026

    详细信息
      作者简介:

      曾联波(1967-), 男, 博士, 教授, 主要从事裂缝的形成、分布及定量预测、应力场分析与应用、油气构造地质学等方面的科研与教学工作.E-mail: lbzeng@sina.com

    • 中图分类号: P618.13

    Type and Sequence of Fractures in the Second Member of Xujiahe Formation at the South of Western Sichuan Depression

    • 摘要: 裂缝是川西坳陷须二段低渗透砂岩天然气藏分布的重要控制因素.利用地表露头、岩心、薄片和成像测井等资料, 对该区裂缝的成因类型、分布特征及其形成序列进行了分析.须二段低渗透砂岩储层主要发育有构造裂缝、成岩裂缝以及与异常高压有关的裂缝等3种裂缝类型, 其中以构造剪切裂缝为主, 主要有近南北向、北东向、近东西向和北西向4组, 它们的发育程度依次由强变弱.但在现今应力场作用下, 北西向裂缝表现为主渗流裂缝.此外, 该区还发育有大量被沥青或碳质充填的裂缝扩张脉群, 结合岩石的声发射等实验结果, 表明该区在白垩纪中晚期曾经经历过异常高压作用, 其最大压力系数可达1.6~2.1, 在新近纪中晚期释放以后的压力系数为1.2~1.3.在中粗粒砂岩中, 还发育大量在构造挤压作用下由于断层的逆冲作用或层间滑动造成的剪切作用有关的近水平剪切裂缝.构造裂缝主要在三叠纪末、白垩纪末和新近纪末—早更新世末形成.

       

    • 图  1  川西南部须二段裂缝方位图

      a.据平落坝构造定向取心井裂缝统计; b.据白马庙构造FMI和裂缝识别测井解释结果统计; c.据邛西构造地磁定向以后的岩心裂缝统计; d.据花水湾上三叠统地表露头区的裂缝统计

      Fig.  1.  Orientation of fractures in the second member of Xujiahe Formation in the southwestern Sichuan depression

      图  2  川西南部须二段FMI成像测井裂缝解释图

      a.垂直裂缝和低角度裂缝; b.垂直裂缝

      Fig.  2.  Interpretative plot of fractures by FMI imaging logging in the second member of Xujiahe Formation in the southwestern Sichuan depression

      图  3  川西南地区须二段岩石破裂序列图

      Fig.  3.  Sequence of fractures in the second member of Xujiahe Formation in the southwestern Sichuan depression

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    • 收稿日期:  2006-03-02
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