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Polymer nanoparticles based nano-fluid for enhanced oil recovery at harsh formation conditions

机译：基于聚合物纳米颗粒的纳米液，用于增强恶劣的形成条件下的采油

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摘要

The application of nano-fluids for enhanced oil recovery (EOR) has attracted noticeable attention and has formed a new research area in recent years. Currently the great challenge for this area is to formulate a stable nano-fluid for oil reservoirs with high-temperature and high-salinity, in particular, when divalent ions are present. In this paper, a novel nano-fluid was developed by using nano-composite formed with polymer nanoparticles (PolyNPs) and a betaine-type zwitterionic surfactant. The developed nano-composite was characterized using electron microscopies (TEM and SEM), Fourier transform infrared (FTIR) spectrometry, dynamic light scattering (DLS), etc. The nano-fluid showed noticeable stability at relatively high salinity (15 wt% simulated brine) and high temperature (80 degrees C) for more than 30 days. The potential of the nano-fluid in recovering oil was evaluated by investigating the interfacial tension with Bakken oil and the oil contact angle in the nano-fluid. The results showed that the water-oil interfacial tension of the Bakken crude oil decreased by 99.49% and the contact angle increased by 125.73% compared to the original values. Then, the EOR efficiency of the nano-fluid was tested using Berea rocks saturated with Bakken crude oil through core flooding experiments. The results showed that the total oil recovery by nano-fluid is 9.32% higher than that of the control. Finally, the possible mechanism of the nano-fluid for EOR was proposed based on the investigation of dynamic displacing processes. The results demonstrated that the developed nano-fluid is a highly promising oil displacement agent for enhanced oil recovery.
机译：纳米流体用于增强的采油（EOR）的应用引起了明显的关注，并在近年来形成了一个新的研究领域。目前，该地区的巨大挑战是为具有高温和高盐度的储物储存器的稳定纳米液，特别是当存在二价离子时。本文通过使用聚合物纳米颗粒（Polynp）和甜菜碱型两性离子表面活性剂形成的纳米复合材料开发了一种新型纳米流体。使用电子显微镜（TEM和SEM），傅里叶变换红外（FTIR）光谱法，动态光散射（DLS）等特征。纳米流体在相对高的盐度下显示出明显的稳定性（15wt％的模拟盐水）高温（80℃）超过30天。通过研究纳米液中的界面张力和纳米液中的含油角来评价回收油中纳米流体的电位。结果表明，与原始值相比，Bakken原油的水 - 油界面张力下降了99.49％，接触角增加了125.73％。然后，通过核心泛洪实验使用Bakken原油饱和的Berea Rocks测试纳米液的EOR效率。结果表明，纳米流体的总油回收率高于对照的9.32％。最后，基于对动态位移过程的研究，提出了用于EOR的纳米流体的可能机制。结果表明，发育的纳米流体是一种高度有前景的油位移剂，用于增强溢油。

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  • 来源
    《Fuel》 |2020年第may1期|117251.1-117251.12|共12页
  • 作者

    Zhou Yanxia; Wu Xu; Zhong Xun; Reagen Sarah; Zhang Shaojie; Sun Wen; Pu Hui; Zhao Julia Xiaojun;

  • 作者单位

    Univ North Dakota Dept Chem Grand Forks ND 58202 USA|Northeast Petr Univ Coll Petr Engn Daqing 163318 Heilongjiang Peoples R China|Northeast Petr Univ Key Lab Enhanced Oil Recovery Educ Minist Daqing 163318 Heilongjiang Peoples R China;

    Univ North Dakota Dept Chem Grand Forks ND 58202 USA;

    Univ North Dakota Dept Petr Engn Grand Forks ND 58202 USA;

    Univ North Dakota Dept Chem Grand Forks ND 58202 USA;

    Univ North Dakota Dept Petr Engn Grand Forks ND 58202 USA;

    Univ North Dakota Dept Chem Grand Forks ND 58202 USA;

    Univ North Dakota Dept Petr Engn Grand Forks ND 58202 USA;

    Univ North Dakota Dept Chem Grand Forks ND 58202 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

    Polymer nanoparticle; Nano-fluid; Interfacial tension; Oil contact angle; Surfactant; Enhanced oil recovery;

    机译：聚合物纳米粒子;纳米液;界面张力;油接触角;表面活性剂;增强的储油;

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