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基于孔与裂隙网络模型的平行微裂隙对驱油的影响规律研究

刘海娇 张旭辉 鲁晓兵

刘海娇, 张旭辉, 鲁晓兵. 基于孔与裂隙网络模型的平行微裂隙对驱油的影响规律研究[J]. 力学学报, 2018, 50(4): 890-898. doi: 10.6052/0459-1879-18-025
引用本文: 刘海娇, 张旭辉, 鲁晓兵. 基于孔与裂隙网络模型的平行微裂隙对驱油的影响规律研究[J]. 力学学报, 2018, 50(4): 890-898. doi: 10.6052/0459-1879-18-025
Liu Haijiao, Zhang Xuhui, Lu Xiaobing. EFFECT OF PARALLEL MICRO-FRACTURES ON FLOODING BASED ON PORE-FRACTURE NETWORK MODEL[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(4): 890-898. doi: 10.6052/0459-1879-18-025
Citation: Liu Haijiao, Zhang Xuhui, Lu Xiaobing. EFFECT OF PARALLEL MICRO-FRACTURES ON FLOODING BASED ON PORE-FRACTURE NETWORK MODEL[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(4): 890-898. doi: 10.6052/0459-1879-18-025

基于孔与裂隙网络模型的平行微裂隙对驱油的影响规律研究

doi: 10.6052/0459-1879-18-025
基金项目: 国家油气重大专项课题(2016ZX05046003-002-001), 国家重点基金研究发展计划(2011CB707302) 和国家专项(2017ZX05013-003) 资助项目.
详细信息
    作者简介:

    *刘海娇,博士,主要研究方向: 低渗油气开采模拟. E-mail: liuhaijiao@imech.ac.cn;*张旭辉,副研究员,主要从事非常规油气开发中的关键力学问题研究. E-mail:zhangxuhui@imech.ac.cn

    通讯作者:

    刘海娇,张旭辉

    张旭辉

  • 中图分类号: TE348;

EFFECT OF PARALLEL MICRO-FRACTURES ON FLOODING BASED ON PORE-FRACTURE NETWORK MODEL

  • 摘要: 认识双重多孔介质中油水两相微观渗流机制是回答形成什么类型的裂隙网络可提高油藏采收率的关键. 微裂隙的分布可以提高多孔介质的绝对渗透率,但对于基质孔隙中的流体介质,微裂隙的存在会引起多孔介质中局部流体压力和流场的变化,导致局部流动以微裂隙流动为主,甚至出现窜流现象,降低驱油效率. 本文基于孔与裂隙双重网络模型,在网络进口设定两条平行等长且具有一定间隔的微裂隙,分析微裂隙的相对间隔(微裂隙之间距离/喉道长度)和微裂隙相对长度(微裂隙长度/喉道长度)对于微观渗流特征的影响. 结果表明:随微裂隙相对长度的增加,出现驱油效率逐渐降低,相对渗透率曲线中的油水共渗区水饱和度和等渗点增加,油水两相的共渗范围减小等现象;随着微裂隙之间相对间隔增大,周围越来越多的基质孔穴间的压力差减小,在毛管压力的限制下,驱替相绕过这些区域,而导致水窜现象.

     

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  • 收稿日期:  2018-01-23
  • 刊出日期:  2018-07-18

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