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<p>This study addresses critical challenges in the formulation of advanced drilling fluids for high-pressure high-temperature (HPHT) environments by investigating TiO<sub>2</sub>@Quillaja Saponin (QS)/Cr nanocomposites as a multifunctional additive. The primary objective was to enhance rheological and filtration properties through optimized nanoparticle-polymer interactions. TiO<sub>2</sub>@QS/Cr was synthesized and incorporated into drilling fluids at varying concentrations (50–1000 ppm) to evaluate viscosity, yield point, and filtration behavior under simulated drilling conditions. Rheological experiments showed that TiO<sub>2</sub>@QS/Cr improved viscosity by up to 52% and yield point by 69% at 500 ppm, aligning closely with Bingham Plastic and Herschel–Bulkley models. Filtration analysis revealed significant reductions in fluid loss, with filtration volumes decreasing from 11 to 3.5 mL at optimal concentrations, attributed to densified filter cakes and reduced permeability. Higher concentrations (&gt; 500 ppm) introduced limitations due to nanoparticle agglomeration, emphasizing the need for formulation optimization. The study also highlighted the long-term stability and lightweight nature of TiO<sub>2</sub>@QS/Cr-enhanced fluids, confirming their suitability for HPHT reservoirs. These findings demonstrate the effectiveness of TiO<sub>2</sub>@QS/Cr nanocomposites in improving drilling fluid performance while identifying avenues for future research in field trials and alternative stabilization approaches.</p>

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Enhanced performance of nanocomposite drilling fluids with synthesized TiO2 Quillaja saponin Cr nanoparticles and their impact on rheology and filtration

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月29日

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  • Ahmed R. ALBajalan,
  • Azad A. Rasol,
  • Hawzhen Fateh M. Ameen,
  • Pshtiwan T. Jaf,
  • Ahmad Abumalek

摘要

This study addresses critical challenges in the formulation of advanced drilling fluids for high-pressure high-temperature (HPHT) environments by investigating TiO2@Quillaja Saponin (QS)/Cr nanocomposites as a multifunctional additive. The primary objective was to enhance rheological and filtration properties through optimized nanoparticle-polymer interactions. TiO2@QS/Cr was synthesized and incorporated into drilling fluids at varying concentrations (50–1000 ppm) to evaluate viscosity, yield point, and filtration behavior under simulated drilling conditions. Rheological experiments showed that TiO2@QS/Cr improved viscosity by up to 52% and yield point by 69% at 500 ppm, aligning closely with Bingham Plastic and Herschel–Bulkley models. Filtration analysis revealed significant reductions in fluid loss, with filtration volumes decreasing from 11 to 3.5 mL at optimal concentrations, attributed to densified filter cakes and reduced permeability. Higher concentrations (> 500 ppm) introduced limitations due to nanoparticle agglomeration, emphasizing the need for formulation optimization. The study also highlighted the long-term stability and lightweight nature of TiO2@QS/Cr-enhanced fluids, confirming their suitability for HPHT reservoirs. These findings demonstrate the effectiveness of TiO2@QS/Cr nanocomposites in improving drilling fluid performance while identifying avenues for future research in field trials and alternative stabilization approaches.