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<p>Mitigating formation damage due to fines migration is crucial for maintaining reservoir productivity in enhanced oil recovery (EOR) processes. This research introduces a novel composite, Titanium dioxide nanoparticles coated with Saponin and Zirconium (TiO<sub>2</sub>@Saponin/Zr(IV)), synthesized via a sol–gel method, to address this challenge, particularly in low salinity water injection scenarios. Characterization through FT-IR confirmed successful functionalization, indicated by the Zr–O band at 480&#xa0;cm<sup>−1</sup> and saponin bands around 1030–1085 cm<sup>−1</sup> and 2919–2850 cm<sup>−1</sup>. Zeta potential measurements showed that in low salinity brine, quartz and kaolinite exhibited highly negative potentials of −&#xa0;32 mV and −&#xa0;45 mV, respectively, while TiO<sub>2</sub>@Saponin/Zr(IV) displayed a positive potential of + 19 mV. Importantly, mixtures of quartz and kaolinite with TiO<sub>2</sub>@Saponin/Zr(IV) in low salinity conditions resulted in moderated zeta potentials of + 3 mV and −&#xa0;2 mV, indicating surface charge modulation. Core flooding experiments further validated the composite’s effectiveness. Injecting high salinity water resulted in a minor permeability reduction from 90 to 78 mD, while low salinity water injection caused a drastic drop from 90 to 8 mD. However, with the introduction of 0.5&#xa0;wt% TiO<sub>2</sub>@Saponin/Zr(IV) in low salinity water, the permeability reduction was significantly controlled, decreasing from 90 to 85 mD. These quantitative results demonstrate that TiO<sub>2</sub>@Saponin/Zr(IV) effectively mitigates fines migration by modifying surface charge and preserving permeability, offering a promising solution for formation damage control and enhanced oil recovery.</p>

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Mitigating fines migration in low salinity water flooding of clay rich sandstones using TiO2 Saponin Zr nanocomposites

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月29日

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  • Yuman Li,
  • Farag M. A. Altalbawy,
  • Nikunj Rachchh,
  • T. Ramachandran,
  • Aman Shankhyan,
  • A. Karthikeyan,
  • Dhirendra Nath Thatoi,
  • Deepak Gupta,
  • Mohammad R. K. M. Al-Badkubi,
  • Dilsora Abduvalieva,
  • Samim Sherzod,
  • Mohammad Mahtab Alam

摘要

Mitigating formation damage due to fines migration is crucial for maintaining reservoir productivity in enhanced oil recovery (EOR) processes. This research introduces a novel composite, Titanium dioxide nanoparticles coated with Saponin and Zirconium (TiO2@Saponin/Zr(IV)), synthesized via a sol–gel method, to address this challenge, particularly in low salinity water injection scenarios. Characterization through FT-IR confirmed successful functionalization, indicated by the Zr–O band at 480 cm−1 and saponin bands around 1030–1085 cm−1 and 2919–2850 cm−1. Zeta potential measurements showed that in low salinity brine, quartz and kaolinite exhibited highly negative potentials of − 32 mV and − 45 mV, respectively, while TiO2@Saponin/Zr(IV) displayed a positive potential of + 19 mV. Importantly, mixtures of quartz and kaolinite with TiO2@Saponin/Zr(IV) in low salinity conditions resulted in moderated zeta potentials of + 3 mV and − 2 mV, indicating surface charge modulation. Core flooding experiments further validated the composite’s effectiveness. Injecting high salinity water resulted in a minor permeability reduction from 90 to 78 mD, while low salinity water injection caused a drastic drop from 90 to 8 mD. However, with the introduction of 0.5 wt% TiO2@Saponin/Zr(IV) in low salinity water, the permeability reduction was significantly controlled, decreasing from 90 to 85 mD. These quantitative results demonstrate that TiO2@Saponin/Zr(IV) effectively mitigates fines migration by modifying surface charge and preserving permeability, offering a promising solution for formation damage control and enhanced oil recovery.