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首页> 外文期刊>Journal of Contaminant Hydrology >Pore scale investigation on scaling-up micro-macro capillary number and wettability on trapping and mobilization of residual fluid
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Pore scale investigation on scaling-up micro-macro capillary number and wettability on trapping and mobilization of residual fluid

机译：扩大微宏毛细管数量和润湿性以捕集和移动剩余流体的孔隙度研究

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摘要

The mobilization mechanism of the trapped phases controlled by the viscous force and capillary force in porous media is crucial to various engineering applications. In this paper, pore scale water flooding process in rock models with nonuniform wettability is simulated by computational fluid dynamics (CFD) using the volume of fluid (VOF) model. Four types of rock are imaged by micro-CT (mu-CT) and adopted as inputs to generate the structured mesh models. The simulations of two-phase flow are carried out to study the immiscible displacement process in the development of oil fields. The scaling-up critical capillary number at micro-macro scale are acquired and validated, the effects of which on relative permeability, residual oil recovery and immiscible displacement efficiency are analyzed. The simulation results indicate that the critical capillary number at microscopic scale ranges from 10(-6) to 10(-5) for water-wetted and oil-wetted rock respectively, and approaches to 1 at the macro scale. The effect of wettability on oil recovery is positive for intermediate-wetted or weak water wetted rock, while negative for strong wettability.
机译：在多孔介质中，由粘性力和毛细力控制的捕获相的动员机制对于各种工程应用至关重要。本文利用流体体积（VOF）模型，通过计算流体动力学（CFD）模拟了具有非均匀润湿性的岩石模型中的孔隙水驱过程。微型CT（mu-CT）对四种类型的岩石进行成像，并作为输入来生成结构化网格模型。进行了两相流模拟，研究了油田开发中的不混溶驱替过程。获取并验证了微尺度放大的临界毛细管数，并分析了其对相对渗透率，剩余油采收率和不混溶驱替效率的影响。仿真结果表明，在微观尺度上，水润湿岩石和油润湿岩石的临界毛细管数在10（-6）到10（-5）之间，在宏观尺度上接近于1。润湿性对油采收率的影响对中等润湿或弱水润湿的岩石是正的，而对强润湿性则是负的。

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  • 来源
    《Journal of Contaminant Hydrology》 |2019年第8期|103499.1-103499.9|共9页
  • 作者

    Wang Yao; Song Rui; Liu Jian-Jun; Cui Meng-Meng; Ranjith P. G.;

  • 作者单位

    Southwest Petr Univ Sch Geosci & Technol Chengdu 610500 Sichuan Peoples R China;

    Southwest Petr Univ Sch Geosci & Technol Chengdu 610500 Sichuan Peoples R China|Chinese Acad Sci Wuhan Inst Rock & Soil Mech State Key Lab Geomech & Geotech Engn Wuhan 430071 Hubei Peoples R China;

    Southwest Petr Univ Sch Petr & Nat Gas Engn Chengdu 610500 Sichuan Peoples R China;

    Monash Univ Dept Civil Engn Deep Earth Energy Res Lab Melbourne Vic 3800 Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Pore-scale modeling; Micro-CT; Nonuniform wettability; Capillary number; Relative permeability;

    机译：孔径模型;微型CT;润湿性不均匀;毛细管数;相对磁导率;

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