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The effect of gas-wetting nano-particle on the fluid flowing behavior in porous media

机译：气体润湿纳米颗粒对多孔介质中流体流动行为的影响

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摘要

The effect of gas-wetting on the liquid-blocking effect near a wellbore region is significant. Here, we functionally modified nano-silica particles with a size of approximately 40 nm each by using a fluorosurfactant and obtained a super gas-wetting nano-silica particles, which could improve the contact angles of brine and hexadecane from 23 and 0 to 152 and 140, respectively, and decrease the surface free energy of rock surface from 72 to 1.6 mN/m. The decrease in the gas displacement was approximately 30%. FT-IR, SEM and EDS were employed to determine the morphological change in the rock surface before and after gas-wetting alteration. Results indicate that when the fluorosurfactant molecules are joined to the nano-silica surface, and C-F bond is recognized. The grape-like particles forming a multi adsorption on the rock surface, which play an important role in super gas-wetting by decreasing surface free energy and increasing roughness on the rock surface. The data of EDS was consistent with the results of FT-IR and SEM. To further understand the influence of gas-wetting alteration on the flow and distribution of fluids in porous media, visualization flooding was conducted. The results show that the initial liquid saturation in the micromodel decreased sharply from 33.23% to 20.77% after the gas-wetting treatment, and the contact angle of isolated brine droplet on the treated pore-wall was approximately 125, which also verifies that pore wettability can be altered to gas-wetting. The analytical data of the oil displacement experiment demonstrates that the substantial decrease in oil saturation may contributes to enhancing oil recovery. Furthermore, the mobility of oil trapped in micro channels can also be enhanced significantly after gas-wetting alteration due to the presence of methane. Published by Elsevier Ltd.
机译：气体润湿对井筒区域附近的液体阻挡作用的影响是显着的。在这里，我们通过使用含氟表面活性剂对每个尺寸约为40 nm的纳米二氧化硅颗粒进行了功能改性，并获得了超湿润的纳米二氧化硅颗粒，可以将盐水和十六烷的接触角从23和0提高到152和140分别将岩石表面的表面自由能从72降低至1.6 mN / m。气体排量的减少约为30％。 FT-IR，SEM和EDS用于确定气体润湿改变前后岩石表面的形态变化。结果表明，当含氟表面活性剂分子连接到纳米二氧化硅表面时，就会识别出C-F键。葡萄状颗粒在岩石表面形成多重吸附，通过降低表面自由能并增加岩石表面的粗糙度，在超级气体润湿中起着重要作用。 EDS数据与FT-IR和SEM结果一致。为了进一步了解气体润湿变化对多孔介质中流体流动和分布的影响，进行了可视化驱替。结果表明，微模型的初始液体饱和度由气体润湿处理后的33.23％急剧降低至20.77％，并且分离的盐水液滴在处理后的孔壁上的接触角约为125，这也证明了孔的可湿性可以更改为湿润气体。驱油实验的分析数据表明，油饱和度的大幅下降可能有助于提高采油率。此外，由于甲烷的存在，气体润湿改变后，捕获在微通道中的油的迁移率也可以显着提高。由Elsevier Ltd.发布

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  • 来源
    《Fuel》 |2017年第may15期|431-441|共11页
  • 作者

    Jin Jiafeng; Wang Yanling; Nguyen Tuan A. H.; Nguyen Anh V.; Wei Mingzhen; Bai Baojun;

  • 作者单位

    China Univ Petr East China, Petr Engn Coll, Qingdao 266580, Shandong, Peoples R China|Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia;

    China Univ Petr East China, Petr Engn Coll, Qingdao 266580, Shandong, Peoples R China;

    Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia;

    Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia;

    Missouri Univ Sci & Technol, Dept Geol Sci & Engn, 1400 N Bishop Ave, Rolla, MO 65409 USA;

    Missouri Univ Sci & Technol, Dept Geol Sci & Engn, 1400 N Bishop Ave, Rolla, MO 65409 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nano-silica; Functional modification; Super gas-wetting; Grape-like particle;

    机译：纳米二氧化硅;功能改性;超强润湿性;类葡萄颗粒;

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