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CO2-Switchable Foams for Enhanced Oil Recovery and Carbon Sequestration
Zhaocheng Qian1, Hao Zhou1, Fuchuan Liu1
1Polymer Research Institute, National Key Laboratory of Advanced Polymer Materials, Sichuan University, Chengdu, 610065, P. R. of China.
Chemistry, an Asian Journal
|May 14, 2025
Summary
New switchable CO2 foams offer enhanced oil recovery and improved carbon sequestration. These CO2-responsive foams, stabilized by a novel surfactant, demonstrate excellent subsurface stability and efficient gas mobility control.
Area of Science:
- Petroleum Engineering
- Chemical Engineering
- Environmental Science
Background:
- Carbon dioxide (CO2) foams are promising for enhanced oil recovery (EOR) but face challenges in stability and CO2 storage assessment.
- Current EOR methods lack efficient gas mobility control and comprehensive CO2 sequestration potential evaluation.
Purpose of the Study:
- To develop and evaluate switchable CO2-responsive foams for improved EOR and carbon sequestration.
- To assess the subsurface stability, CO2 storage potential, and performance of novel CO2-responsive foams.
Main Methods:
- Utilized laboratory experiments under simulated reservoir conditions.
- Employed microfluidic visualization and core-flooding experiments.
- Conducted absorption experiments for CO2 sequestration efficiency.
Main Results:
- Demonstrated reversible foam modulation via alternating CO2 and N2 exposure.
- Achieved resistance factors up to 14 in core-flooding experiments, indicating robust conformance control.
- Showcased a 22% increase in CO2 sequestration efficiency compared to traditional brine flooding.
Conclusions:
- Developed a novel CO2-responsive surfactant (UC22AMPM) for switchable foams.
- Established a quantitative framework for utilizing CO2-responsive foams in EOR and carbon sequestration.
- Highlighted the potential for sustainable carbon capture and storage through advanced foam technology.
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