石油勘探与开发 >

2021 , Vol. 48 >Issue 4: 825 - 834

DOI: https://doi.org/10.11698/PED.2021.04.15

油气田开发

纳米流体驱提高原油采收率的三维孔隙尺度模拟

  • MINAKOV Andrey Viktorovich ,
  • GUZEI Dmitriy Viktorovich ,
  • PRYAZHNIKOV М ,
  • axim Ivanovich
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  • 1.西伯利亚联邦大学,克拉斯诺亚尔斯克 660041,俄罗斯;
    2.库塔捷拉泽热物理研究所,俄罗斯科学院西伯利亚分院,新西伯利亚 630090,俄罗斯
MINAKOV Andrey Viktorovich（1982-）,男,俄罗斯人,博士,西伯利亚联邦大学副教授,主要从事计算流体动力学和提高采收率方面的研究。地址：No. 79, Svobodnyy Avenue, Oktyabrsky District, Krasnoyarsk City, Krasnoyarsk region, Russia。E-mail: aminakov@sfu-kras.ru

收稿日期: 2020-12-01

  修回日期: 2021-06-18

  网络出版日期: 2021-07-23

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3D pore-scale modeling of nanofluids-enhanced oil recovery

  • MINAKOV Andrey Viktorovich ,
  • GUZEI Dmitriy Viktorovich ,
  • PRYAZHNIKOV М ,
  • axim Ivanovich
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  • 1. Siberian Federal University, Krasnoyarsk 660041, Russia;
    2. Kutateladze Institute of Thermophysics, SB RAS, Novosibirsk 630090, Russia

Received date: 2020-12-01

  Revised date: 2021-06-18

  Online published: 2021-07-23

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摘要

基于不同渗透率岩心的三维微观模型,采用流体体积法对纳米流体驱油进行数值模拟;利用实验测得的含SiO2纳米颗粒的悬浮液界面张力、接触角和黏度,针对质量分数为0~1%、具有不同粒径的SiO2纳米颗粒的水基悬浮液,研究了纳米颗粒质量分数和粒径、驱替液流速、原油黏度和岩心渗透率对纳米流体驱油效率的影响。研究表明：采收率随着颗粒质量分数的增加而增加,纳米颗粒质量分数增加到0.5%时,与水驱相比采收率可提高约19%;纳米流体驱油采收率随着纳米颗粒粒径的减小而增加;在毛管数接近临界值的注入模式下使用纳米流体驱油对高黏低渗储集层提高采收率最为有效,且提高采收率幅度随着驱替速度的增加而减小;原油黏度越大,岩石渗透率越小,纳米流体驱油提高采收率的效果越明显。 图16 表2 参37

关键词： 纳米流体驱油; 提高采收率; 孔隙尺度模拟; 流体体积法

本文引用格式

MINAKOV Andrey Viktorovich , GUZEI Dmitriy Viktorovich , PRYAZHNIKOV М , axim Ivanovich . 纳米流体驱提高原油采收率的三维孔隙尺度模拟[J]. 石油勘探与开发, 2021 , 48(4) : 825 -834 . DOI: 10.11698/PED.2021.04.15

Abstract

The numerical modeling of oil displacement by nanofluid based on three-dimensional micromodel of cores with different permeability was carried out by the volume of fluid (VOF) method with experimentally measured values of interfacial tension, contact angle and viscosity. Water-based suspensions of SiO2 nanoparticles with a concentration of 0-1% and different particle sizes were considered to study the effect of concentration and size of nanoparticles, displacement fluid flow rate, oil viscosity and core permeability on the efficiency of oil displacement by nanofluid. The oil recovery factor (ORF) increases with the increase of mass fraction of nanoparticles. An increase in nanoparticles' concentration to 0.5% allows an increase in ORF by about 19% compared to water flooding. The ORF increases with the decrease of nanoparticle size, and declines with the increase of displacing rate. It has been shown that the use of nanosuspensions for enhanced oil recovery is most effective for low-permeable reservoirs with highly viscous oil in injection modes with capillary number close to the immobilization threshold, and the magnitude of oil recovery enhancement decreases with the increase of displacement speed. The higher the oil viscosity, the lower the reservoir rock permeability, the higher the ORF improved by nanofluids will be.

Key words： nanofluid flooding; enhanced oil recovery; pore scale modeling; fluid volume method

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