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    转向压裂增产评价方法

    王晓冬 史云清 侯晓春 徐文丽

    王晓冬, 史云清, 侯晓春, 徐文丽, 2017. 转向压裂增产评价方法. 地球科学, 42(8): 1296-1300. doi: 10.3799/dqkx.2017.102
    引用本文: 王晓冬, 史云清, 侯晓春, 徐文丽, 2017. 转向压裂增产评价方法. 地球科学, 42(8): 1296-1300. doi: 10.3799/dqkx.2017.102
    Wang Xiaodong, Shi Yunqing, Hou Xiaochun, Xu Wenli, 2017. Enhancement Evaluation of Vertical Reorientation Fractures. Earth Science, 42(8): 1296-1300. doi: 10.3799/dqkx.2017.102
    Citation: Wang Xiaodong, Shi Yunqing, Hou Xiaochun, Xu Wenli, 2017. Enhancement Evaluation of Vertical Reorientation Fractures. Earth Science, 42(8): 1296-1300. doi: 10.3799/dqkx.2017.102

    转向压裂增产评价方法

    doi: 10.3799/dqkx.2017.102
    基金项目: 

    国家科技重大专项 2016ZX05060

    详细信息
      作者简介:

      王晓冬(1964-), 男, 教授, 主要从事油气藏开发工程、油气渗流力学理论与方法及油藏数值模拟等方面的教学和科研工作

    • 中图分类号: P62

    Enhancement Evaluation of Vertical Reorientation Fractures

    • 摘要: 转向压裂是一项新兴的水力压裂技术,在平面渗透率各向异性储层中转向垂直裂缝具有更好的增产效果.基于渗流力学之汇源叠加理论,建立了平面渗透率各向异性储层中转向垂直裂缝的增产评价解析模型,并给出了计算对比和应用算例.分析结果表明:裂缝与渗透率主轴间的夹角(裂缝斜角)微弱影响均匀各向同性储层中井的产能,但明显影响均匀各向异性储层中井的产能;裂缝斜角变化导致沿优势渗透率方向有效流入面积变化,有效流入面积越大,无量纲生产指数越大,产能亦高.因此建议选择平面方向渗透率差异较大的储层进行转向压裂,以期获得更好的经济效益.

       

    • 图  1  转向垂直裂缝示意

      Fig.  1.  The sketch of a vertical reorientation fracture

      图  2  斜角垂直裂缝示意

      Fig.  2.  The sketch of a fracture with an orientation angle

      图  3  裂缝斜角对无量纲生产指数曲线的影响

      Fig.  3.  The effect of fracture orientation angles on dimensionless productivity index

      图  4  渗透率各向异性影响无量纲生产指数曲线

      Fig.  4.  The effect of permeability anisotropy on dimensionless productivity index

      图  5  转向垂直裂缝产量计算结果

      Fig.  5.  The production of a vertical reorientation fracture

      表  1  算例参数

      Table  1.   Parameters used for calculation

      kx(mD) ky(mD) xe(m) ye(m) xw(m) yw(m) Lf1(m) Lf3(m) Lf2(m) cfDj μ(cp) B(m3/m3) h(m) θ(°)
      5.0 1.0 500.0 500.0 250.0 250.0 10.0 10.0 30.0 1.5 1.0 1.0 15.0 5, 15, 30, 45, 60, 75, 88
      下载: 导出CSV
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    出版历程
    • 收稿日期:  2017-03-31
    • 刊出日期:  2017-08-15

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