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To clarify the potential of CO2 storage in the saline aquifer of S area in Xinjiang and optimize the on-site injection parameters, a multi-physics field numerical model of CO2 storage in the S area saline aquifer was established by coupling multiphase flow, heat conduction, reaction kinetics and mechanical models. The influence of different factors on the CO2 injection seepage field and CO2 storage forms was evaluated through numerical simulation. The injection volume and horizontal migration distance of CO2 are mainly affected by the horizontal permeability, the vertical accumulation thickness is mainly controlled by the reservoir pressure, the structural storage is mainly controlled by the formation dip angle, and the capillary storage and dissolution storage are mainly affected by the temperature. Through the numerical simulation model of the actual block, the well pattern and injection mode were optimized. Under the water displacement condition, the theoretical CO2 storage capacity in 20 years was 7.93 million tons, the cumulative drainage was 1.34 million tons, and the horizontal migration distance of CO2 was 890 m.

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Optimization of CO2 Sequestration Parameters in Saline Aquifers in Xinjiang's S Region Using Multi-physics Coupled Numerical Simulation

  • 章节

  • 发表日期：

    2026年

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  • Li Kai,
  • Luo Qiang,
  • Li Ming,
  • Hui Ze-you,
  • Hu Xiao-die

摘要

To clarify the potential of CO2 storage in the saline aquifer of S area in Xinjiang and optimize the on-site injection parameters, a multi-physics field numerical model of CO2 storage in the S area saline aquifer was established by coupling multiphase flow, heat conduction, reaction kinetics and mechanical models. The influence of different factors on the CO2 injection seepage field and CO2 storage forms was evaluated through numerical simulation. The injection volume and horizontal migration distance of CO2 are mainly affected by the horizontal permeability, the vertical accumulation thickness is mainly controlled by the reservoir pressure, the structural storage is mainly controlled by the formation dip angle, and the capillary storage and dissolution storage are mainly affected by the temperature. Through the numerical simulation model of the actual block, the well pattern and injection mode were optimized. Under the water displacement condition, the theoretical CO2 storage capacity in 20 years was 7.93 million tons, the cumulative drainage was 1.34 million tons, and the horizontal migration distance of CO2 was 890 m.