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Method for Calculating Non-Darcy Flow Permeability in Tight Oil Reservoir

机译：在封装储层中计算非达西流动渗透性的方法

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摘要

Capillary force and boundary layer effect are the main causes of non-Darcy flow in tight oil reservoir. This paper proposes a non-Darcy flow dynamics characterization method for low-speed water flooding in tight oil reservoirs. It applies constant-speed mercury injection and casting thin section experiments to quantitatively characterize the micro-pore throat structure parameters, and uses the visual experimental device to measure the boundary layer thickness and fit the expression of the relationship between boundary layer thickness and displacement pressure gradient and fluid viscosity. The results show that the ratio of boundary layer thickness to microtubule radius changes exponentially with the pressure gradient and fluid viscosity and that the boundary layer thickness decreases gradually with the increase of pressure gradient. Given the capillary force and boundary layer thickness, the flow rate of single capillary is calculated. On this basis, the equation of nonlinear seepage dynamic characteristics per unit area of core is derived by taking into account the throat distribution frequency and throat size characteristics. The new seepage flow model can reflect the nonlinear seepage flow law of tight oil reservoir and provide reference for parameter formulation during water flooding development of tight oil reservoir.
机译：毛细管力和边界层效应是狭窄油藏非达西流动的主要原因。本文提出了一种非达西流动动力学表征方法，用于狭小储油储层低速水淹水。它适用于恒速汞注入和铸造薄剖视图，以定量表征微孔喉部结构参数，并使用视觉实验装置测量边界层厚度并符合边界层厚度和位移压力梯度之间的关系的表达和流体粘度。结果表明，边界层厚度与微管半径的比率以压力梯度和流体粘度呈指数逐渐变化，并且随着压力梯度的增加，边界层厚度逐渐降低。考虑到毛细力和边界层厚度，计算单毛细管的流速。在此基础上，通过考虑喉部分布频率和喉部尺寸特性来导出每个单位核心区域的非线性渗流动态特性的等式。新的渗流流模型可以反映紧储油储存器的非线性渗流法律，并为靠近储油水库的水洪水开发过程中参数配方提供参考。

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  • 来源
    《Transport in Porous Media》 |2020年第3期|357-372|共16页
  • 作者

    Wang Hengli; Tian Leng; Gu Daihong; Li Mei; Chai Xiaolong; Yang Yicong;

  • 作者单位

    China Univ Petr State Key Lab Petr Resources & Prospecting Beijing 102249 Peoples R China|China Univ Petr Inst Petr Engn Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Petr Resources & Prospecting Beijing 102249 Peoples R China|China Univ Petr Inst Petr Engn Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Petr Resources & Prospecting Beijing 102249 Peoples R China|China Univ Petr Inst Petr Engn Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Petr Resources & Prospecting Beijing 102249 Peoples R China|China Univ Petr Inst Petr Engn Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Petr Resources & Prospecting Beijing 102249 Peoples R China|China Univ Petr Inst Petr Engn Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Petr Resources & Prospecting Beijing 102249 Peoples R China|China Univ Petr Inst Petr Engn Beijing 102249 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Tight oil reservoir; Boundary layer; Non-darcy; Permeability;

    机译：拧紧油箱;边界层;非达西;渗透率;

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