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    致密砂岩气层中成岩相对岩电特征的影响

    刘洪平 骆杨 赵彦超 陈召佑 穆国栋

    刘洪平, 骆杨, 赵彦超, 陈召佑, 穆国栋, 2017. 致密砂岩气层中成岩相对岩电特征的影响. 地球科学, 42(4): 652-660. doi: 10.3799/dqkx.2017.053
    引用本文: 刘洪平, 骆杨, 赵彦超, 陈召佑, 穆国栋, 2017. 致密砂岩气层中成岩相对岩电特征的影响. 地球科学, 42(4): 652-660. doi: 10.3799/dqkx.2017.053
    Liu Hongping, Luo Yang, Zhao Yanchao, Chen Zhaoyou, Mu Guodong, 2017. Effects of Diagenetic Facies on Rock Electrical Properties in Tight Gas Sandstones. Earth Science, 42(4): 652-660. doi: 10.3799/dqkx.2017.053
    Citation: Liu Hongping, Luo Yang, Zhao Yanchao, Chen Zhaoyou, Mu Guodong, 2017. Effects of Diagenetic Facies on Rock Electrical Properties in Tight Gas Sandstones. Earth Science, 42(4): 652-660. doi: 10.3799/dqkx.2017.053

    致密砂岩气层中成岩相对岩电特征的影响

    doi: 10.3799/dqkx.2017.053
    基金项目: 

    国家自然科学基金青年基金 41402117

    构造与油气资源教育部重点实验室开放基金 TPR-2015-11

    详细信息
      作者简介:

      刘洪平 (1988-),男,博士研究生,主要从事油气藏精细描述、非常规油气储层测井评价.ORCID:0000-0002-0721-7144.E-mail: liuhongping12@126.com

      通讯作者:

      赵彦超,ORCID:0000-0003-3459-8656.E-mail: ychzhao2008@163.com

    • 中图分类号: P631

    Effects of Diagenetic Facies on Rock Electrical Properties in Tight Gas Sandstones

    • 摘要: 致密砂岩气层的研究是目前的研究前沿之一.利用铸体薄片、物性、高压压汞、micro-CT、岩电实验等分析化验资料,探讨了鄂尔多斯盆地定北地区二叠系太原组致密砂岩不同成岩相类型对岩电特征的控制作用.研究表明:研究区可以划分为4种成岩相类型,包括硅质胶结成岩相、高岭石部分充填成岩相、不稳定组分溶蚀成岩相,压实致密成岩相.4种成岩相类型地层因素和孔隙度在同一趋势线上,可以采用统一的am值.4种成岩相类型的n值有明显差异,取值依次为2.30、1.51、2.03和4.04.含气饱和度解释实例显示,对不同成岩相取不同n值与试气结果吻合较好,优于n值取理论值2的结果.

       

    • 图  1  不同成岩相微观照片

      a.硅质胶结成岩相;b.高岭石部分充填成岩相;c.不稳定组分溶蚀成岩相;d.压实致密成岩相

      Fig.  1.  Photomicrographs of various diagenetic facies

      图  2  不同成岩相类型泥质含量与粒度中值关系

      Fig.  2.  Clay content versus median grain diameter of different diagenetic facies

      图  3  不同成岩相类型孔隙度与渗透率关系

      Fig.  3.  Air permeability versus porosity of different diagenetic facies

      图  4  不同成岩相类型与各种参数的关系

      a.不同成岩相类型地层因素和孔隙度的关系;b.不同成岩相类型胶结指数与孔隙度的关系;c.不同成岩相类型胶结指数与平均孔喉半径的关系;d.不同成岩相类型胶结指数与退汞效率的关系

      Fig.  4.  The relationship between porosity of different diagenetic facies

      图  5  不同成岩相类型电阻率增大系数与含水饱和度的关系

      Fig.  5.  Resistivity index versus water saturation of different diagenetic facies

      图  6  不同成岩相类型与各种参数的关系

      a.不同成岩相类型饱和度指数和孔隙度的关系;b.不同成岩相类型饱和度指数和渗透率的关系;c.不同成岩相类型饱和度指数与平均孔喉半径的关系;d.不同成岩相类型饱和度指数和泥质含量的关系

      Fig.  6.  The relationship between porosity of different diagenetic facies

      图  7  不同成岩相类型micro-CT扫描图

      分辨精度分别为1.5、0.9和0.9 μm;a.硅质胶结成岩相;b.高岭石部分充填成岩相;c.不稳定组分溶蚀成岩相

      Fig.  7.  Micro-CT image of different diagenetic facies

      图  8  DB13井测井综合解释

      Fig.  8.  Well logging interpretation graph of well DB13

      图  9  DB17井测井综合解释

      Fig.  9.  Well logging interpretation graph of well DB17

      图  10  DB27井测井综合解释

      Fig.  10.  Well logging interpretation graph of well DB27

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    • 收稿日期:  2016-10-25
    • 刊出日期:  2017-04-15

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