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<p>Despite the widespread adoption of green energy technologies, the improvement and development of new environmentally friendly and more energy-efficient methods of oil and gas production is still an urgent task. In this sense, the enhancement of surfactant–polymer flooding methods to increase oil recovery seems to be the most rational approach in terms of cost-effectiveness and equipment. This study systematically explores the possibility of increasing the efficiency of traditional surfactant solutions, polymers, and their composites through modification with nanoparticles using novel, unique microfluidic chips simulating terrigenous and fractured-cavernous reservoirs. Eight different oil-displacing fluids are investigated. AES-based surfactant solution and polyacrylamide solution are used as base solutions, to that effect modified with spherical silicon oxide nanoparticles with a size of 10&#xa0;nm. The experiments serve to determine the dependences of the oil recovery factor and pressure losses during flooding of microchips with different pore space structures by the studied solutions. The experimental results have shown that introducing nanoparticles into solutions with surfactant–polymer compositions provides an additional significant increase in the oil recovery factor. The modification of the surfactant–polymer composition with nanoparticles increases the factor by 31.21%, compared to water, or by 19.23%, compared to the composition without the adding of particles. This opens up new prospects for improving the efficiency of traditional methods of oil recovery enhancement, i.e., surfactant–polymer flooding. The data obtained may serve as a basis for the development of new technologies aimed at improving oil recovery and optimizing oil production processes.</p>

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Systematic microfluidic study of the mechanisms of intensification of oil recovery by nanomodified surfactant-polymer compositions

  • 期刊论文

  • 发表日期：

    2026年1月28日

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  • A. I. Pryazhnikov,
  • R. A. Vaganov,
  • S. S. Lubenets,
  • A. S. Yakimov,
  • M. I. Pryazhnikov,
  • A. V. Minakov

摘要

Despite the widespread adoption of green energy technologies, the improvement and development of new environmentally friendly and more energy-efficient methods of oil and gas production is still an urgent task. In this sense, the enhancement of surfactant–polymer flooding methods to increase oil recovery seems to be the most rational approach in terms of cost-effectiveness and equipment. This study systematically explores the possibility of increasing the efficiency of traditional surfactant solutions, polymers, and their composites through modification with nanoparticles using novel, unique microfluidic chips simulating terrigenous and fractured-cavernous reservoirs. Eight different oil-displacing fluids are investigated. AES-based surfactant solution and polyacrylamide solution are used as base solutions, to that effect modified with spherical silicon oxide nanoparticles with a size of 10 nm. The experiments serve to determine the dependences of the oil recovery factor and pressure losses during flooding of microchips with different pore space structures by the studied solutions. The experimental results have shown that introducing nanoparticles into solutions with surfactant–polymer compositions provides an additional significant increase in the oil recovery factor. The modification of the surfactant–polymer composition with nanoparticles increases the factor by 31.21%, compared to water, or by 19.23%, compared to the composition without the adding of particles. This opens up new prospects for improving the efficiency of traditional methods of oil recovery enhancement, i.e., surfactant–polymer flooding. The data obtained may serve as a basis for the development of new technologies aimed at improving oil recovery and optimizing oil production processes.