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    缝洞型油藏井钻遇大尺度部分充填溶洞数学模型

    雷刚 张东晓 杨伟 王会杰

    雷刚, 张东晓, 杨伟, 王会杰, 2017. 缝洞型油藏井钻遇大尺度部分充填溶洞数学模型. 地球科学, 42(8): 1413-1420. doi: 10.3799/dqkx.2017.519
    引用本文: 雷刚, 张东晓, 杨伟, 王会杰, 2017. 缝洞型油藏井钻遇大尺度部分充填溶洞数学模型. 地球科学, 42(8): 1413-1420. doi: 10.3799/dqkx.2017.519
    Lei Gang, Zhang Dongxiao, Yang Wei, Wang Huijie, 2017. Mathematical Model for Wells Drilled in Large-Scale Partially Filled Cavity in Fractured-Cavity Reservoirs. Earth Science, 42(8): 1413-1420. doi: 10.3799/dqkx.2017.519
    Citation: Lei Gang, Zhang Dongxiao, Yang Wei, Wang Huijie, 2017. Mathematical Model for Wells Drilled in Large-Scale Partially Filled Cavity in Fractured-Cavity Reservoirs. Earth Science, 42(8): 1413-1420. doi: 10.3799/dqkx.2017.519

    缝洞型油藏井钻遇大尺度部分充填溶洞数学模型

    doi: 10.3799/dqkx.2017.519
    基金项目: 

    中国博士后科学基金项目 2017M610706

    国家科技重大专项 2016ZX05014004-006

    详细信息
      作者简介:

      雷刚(1987-), 男, 博士后, 主要从事缝洞型碳酸盐岩油藏开发方面研究

    • 中图分类号: P345

    Mathematical Model for Wells Drilled in Large-Scale Partially Filled Cavity in Fractured-Cavity Reservoirs

    • 摘要: 缝洞型油藏不同介质间流体窜流的研究对于大尺度溶洞中原油是否能够得到有效开发具有重大意义.基于缝洞型油藏大尺度溶洞充填特征,建立了井钻遇大尺度部分充填溶洞数学模型,采用Laplace变换和Stehfest数值反演,分别得到了基岩-溶洞未充填区域窜流量、溶洞充填区域-溶洞未充填区域窜流量和大尺度溶洞无因次流量,并分析了不同参数对窜流特征曲线的影响.研究结果表明:流体窜流过程可划分为4个流动阶段,流动前期和中前期主要为基质中流体向溶洞未充填部分窜流;流动中后期和后期主要为溶洞充填物流体向溶洞未充填部分窜流.在流动前期,基质和未充填溶洞间流体交换对部分充填溶洞流量贡献较大;而流动后期,溶洞充填物和未充填溶洞间流体交换对部分充填溶洞流量贡献较大.重力会导致溶洞充填物-溶洞未充填部分窜流量减小,而基质-溶洞未充填部分窜流不受到重力影响.溶洞充填程度、溶洞未充填部分和基质系统能量等因素对窜流特征曲线具有重大的影响.研究方法和结果对合理分析缝洞型油藏大尺度溶洞流动特征具有一定的指导意义.

       

    • 图  1  溶洞-基岩型缝洞油藏示意

      Fig.  1.  The sketch of large size vug and matrix in fractured-vuggy reservoir

      图  2  流动特征曲线

      Fig.  2.  Typical crossflow characteristic curve for the model

      图  3  无因次重力对窜流特征曲线影响

      Fig.  3.  Effect of dimensionless gravity on the crossflow characteristic curve

      图  4  无因次变量CD对窜流特征曲线影响

      Fig.  4.  Effect of dimensionless variable CD on the crossflow characteristic curve

      图  5  无因次变量h2D对窜流特征曲线影响

      Fig.  5.  Effect of dimensionless variable h2D on the crossflow characteristic curve

      图  6  无因次变量δ对窜流特征曲线影响

      Fig.  6.  Effect of dimensionless variable δ on the crossflow characteristic curve

      图  7  无因次变量ω对窜流特征曲线影响

      Fig.  7.  Effect of dimensionless variable ω on the crossflow characteristic curve

      图  8  无因次变量reD对窜流特征曲线影响

      Fig.  8.  Effect of dimensionless variable reD on the crossflow characteristic curve

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