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CO2 EOR (enhanced oil recovery) represents one of the most cost-effective methods for achieving carbon neutrality. However, CO2 flooding en-counters serious preferential flow in porous mediums, which significantly reduces the economic benefits of CO2-EOR and exacerbates the risk of CO2 leakage. This study synthesized a tertiary amine-based, CO2-responsive microgel. The micro-gel possesses a particle size of ~ 7.50 μm in neutral formation water and expands to 2–4 times upon contact with CO2, thereby offering advantages in deep profile modification and selective CO2 plugging. Core flooding experiments confirmed the microgel's effectiveness in deep profile modification and EOR in heterogeneous reservoirs.

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Synthesis and Characterization of CO2-Responsive Microgel for In-Depth Conformance Control in Carbon Capture and Storage

  • 会议论文

  • 发表日期：

    2025年

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  • Qihui Wu,
  • Junjie Zhong

摘要

CO2 EOR (enhanced oil recovery) represents one of the most cost-effective methods for achieving carbon neutrality. However, CO2 flooding en-counters serious preferential flow in porous mediums, which significantly reduces the economic benefits of CO2-EOR and exacerbates the risk of CO2 leakage. This study synthesized a tertiary amine-based, CO2-responsive microgel. The micro-gel possesses a particle size of ~ 7.50 μm in neutral formation water and expands to 2–4 times upon contact with CO2, thereby offering advantages in deep profile modification and selective CO2 plugging. Core flooding experiments confirmed the microgel's effectiveness in deep profile modification and EOR in heterogeneous reservoirs.