特种油气藏 ›› 2024, Vol. 31 ›› Issue (3): 1-10.DOI: 10.3969/j.issn.1006-6535.2024.03.001

• 综述 •    下一篇

纳米流体提高采收率机理研究现状

郝龙1, 侯吉瑞1, 梁拓2, 闻宇晨1, 屈鸣3   

  1. 1.中国石油大学(北京),北京 102249;
    2.西安石油大学,陕西 西安 213164;
    3.东北石油大学三亚海洋油气研究院,海南 三亚 572024
  • 收稿日期:2023-06-11 修回日期:2024-03-22 出版日期:2024-06-25 发布日期:2024-07-26
  • 通讯作者: 侯吉瑞(1965—),男,研究员,1987年毕业于延边大学化学专业,2007年毕业于大连理工大学应用化学专业,获博士学位,现从事油田化学及提高采收率方面的研究工作。
  • 作者简介:郝龙(1998—),男,2021年毕业于延安大学石油工程专业,现为中国石油大学(北京)石油与天然气专业在读硕士研究生,研究方向为提高原油采收率。
  • 基金资助:
    国家自然科学基金“低渗特低渗油藏片状纳米材料-微米自适应桥接颗粒协同控窜-调流-驱油理论研究”(52174046);中国石油科技创新基金“特低渗油藏智能片状纳米材料调驱作用机理研究”(2021DQ02-0202)

Research Status on Mechanism of Enhanced Oil Recovery by Nanofluids

Hao Long1, Hou Jirui1, Liang Tuo2, Wen Yuchen1, Qu Ming3   

  1. 1. China University of Petroleum (Beijing), Beijing, 102249, China;
    2. Xi′an Shiyou University, Xi′an, Shaanxi, 213164, China;
    3. NEPU Sanya Offshore Oil & Gas Research Institute, Sanya, Hainan, 572024, China
  • Received:2023-06-11 Revised:2024-03-22 Online:2024-06-25 Published:2024-07-26

摘要: 与传统的表面活性剂和聚合物溶液相比,纳米流体驱油是一项新的提高采收率技术,但目前机理研究成果较为分散,缺少系统性。因此,结合国内外纳米流体研究情况,总结纳米流体主要提高采收率机理,指出了纳米流体目前所面临的研究难点,展望了纳米材料在今后的攻关方向。研究表明:纳米流体提高采收率机理包括降低油水界面张力,在油水固三相区形成楔形膜,产生结构分离压力,改善流度比扩大波及体积,改变岩石润湿性,增强泡沫稳定性,降低注入压力和选择性调堵孔道;今后可从提高纳米流体稳定性、降低纳米流体成本、提高采收率机理协同性研究以及开发高效纳米驱油体系等方面进行深入探索。该研究为大规模推广纳米流体在提高采收率方面的应用提供了理论基础和实验依据。

关键词: 纳米流体, 提高采收率, 界面张力, 结构分离压力, 润湿性

Abstract: As a new technology to enhance oil recovery, nanofluid flooding has advantages over traditional surfactants and polymer solutions flooding. However, the current research on the mechanism of this technology is not systematic. Based on the research progress of nanofluids at home and abroad,this study summarizes the main EOR mechanism of nanofluid flooding. Meanwhile,the current difficulties faced by this technology and the future research direction are pointed out.The results show that the EOR mechanism of nanofluids flooding includes: reducing oil-water interfacial tension;forming a wedge-shaped film in three-phase (oil-water-solid) zone, which results in the pressure of structural separation; improving the mobility ratio to expand the swept area; altering the wettability of rock;enhancing foam stability; reducing injection pressure and selecting the porous channels of water plugging.Future research can focus on improving the stability of nanofluids, reducing costs, conducting synergistic studies on the mechanisms of enhanced oil recovery, and developing efficient nano-flooding systems.This study lays a theoretical and experimental foundation for the large-scale application of nanofluids in enhanced oil recovery process.

Key words: nanofluids, enhance oil recovery, interfacial tension, pressures of structural separation, wettability

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