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    干酪根对页岩基质中甲烷运移规律的影响

    王金杰 于龙 苑庆旺 何文波 郭超华

    王金杰, 于龙, 苑庆旺, 何文波, 郭超华, 2017. 干酪根对页岩基质中甲烷运移规律的影响. 地球科学, 42(8): 1386-1393. doi: 10.3799/dqkx.2017.105
    引用本文: 王金杰, 于龙, 苑庆旺, 何文波, 郭超华, 2017. 干酪根对页岩基质中甲烷运移规律的影响. 地球科学, 42(8): 1386-1393. doi: 10.3799/dqkx.2017.105
    Wang Jinjie, Yu Long, Yuan Qingwang, He Wenbo, Guo Chaohua, 2017. Effect of Kerogen on the Methane Transport Mechanism in Shale Matrix. Earth Science, 42(8): 1386-1393. doi: 10.3799/dqkx.2017.105
    Citation: Wang Jinjie, Yu Long, Yuan Qingwang, He Wenbo, Guo Chaohua, 2017. Effect of Kerogen on the Methane Transport Mechanism in Shale Matrix. Earth Science, 42(8): 1386-1393. doi: 10.3799/dqkx.2017.105

    干酪根对页岩基质中甲烷运移规律的影响

    doi: 10.3799/dqkx.2017.105
    基金项目: 

    中国地质大学(武汉)杰出人才培育基金项目 G1323541746

    详细信息
      作者简介:

      王金杰(1987-), 女, 副教授, 主要从事油气渗流规律及页岩气运移机理研究

      通讯作者:

      郭超华

    • 中图分类号: P313.1

    Effect of Kerogen on the Methane Transport Mechanism in Shale Matrix

    • 摘要: 微/纳米孔隙内甲烷的运移研究是进行页岩气藏开发预测及评价的前提和基础.页岩中分布大量的微/纳米孔隙,其中干酪根中的纳米级孔隙分布广泛.由于气体在不同尺度孔隙中的运移机理大不相同,且在有机孔中存在明显的吸附/解吸现象.因而,甲烷在页岩中的运移机理仍需完善.本研究综合物理模拟及数学分析方法,对甲烷渗流规律进行研究.研究结果表明:(1)温度升高,单位质量页岩的产量减少,达到平衡的时间缩短,总体体现在甲烷在高温下的吸附/解吸-扩散速率大.(2)相同生产压力下,随入口压力升高,甲烷运移速率增大,达到产量平衡的时间增长.(3)数学模型充分考虑干酪根中甲烷扩散对气体运移过程的影响,并与实验结果及不考虑干酪根影响的模型进行对比分析,结果显示,本文建立的数学模型能更准确地描述甲烷在页岩基质中的运移动态.

       

    • 图  1  取样井位及构造图

      a.建南构造北高点建页HF-1井地理位置;b.涪陵地区大安寨大二亚段顶界构造

      Fig.  1.  Well location and the structural sketch

      图  2  取样区块地质年代

      Fig.  2.  Geological sketch for the sample block

      图  3  气体运移规律研究装置流程

      Fig.  3.  Flow chart for gas flow equipment

      图  4  温度对甲烷运移过程影响

      Fig.  4.  The effect of temperature on methane flow process

      图  5  压力对甲烷运移过程影响

      Fig.  5.  The effect of pressure on methane flow process

      图  6  页岩基质颗粒甲烷运移模型

      Fig.  6.  Physical model for methane transport in shale matrix

      图  7  干酪根对甲烷运移过程影响(45 ℃)

      Fig.  7.  The effect of kerogen on methane flow process (45 ℃)

      表  1  页岩基本参数

      Table  1.   Basic parameters for tested shale cores

      名称 孔隙度
      (%)
      渗透率
      (D)
      TOC
      (%)
      样品尺寸
      (目)
      质量
      (g)
      数值 3.76 3.51 1.70 100~120 160
      下载: 导出CSV
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    • 收稿日期:  2017-03-31
    • 刊出日期:  2017-08-15

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