| Citation: |
ZHAO Wenyue, SANG Guoqiang, XIAO Zheyu, DIWU Pengxiang, HU Shuai. Numerical Simulation Method of CO2 EOR Considering the Competitive Dissolution of CH4 and CO2 in the Aqueous Phase[J]. Journal of South China Normal University (Natural Science Edition), 2024, 56(4): 19-26. DOI: 10.6054/j.jscnun.2024046
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To investigate the interactions between CO2 and CH4 in aqueous phase and their competitive dissolution effects on CO2-enhanced oil recovery processes, a numerical simulation model incorporating the competitive dissolution of CO2 and CH4 was developed. The established model modifies the solubility of CH4 at different CO2 concentrations and improves the equilibrium constants that characterize methane solubility. Simulation results indicate significant changes in the distribution of gas components due to competitive dissolution, affecting the gas-oil ratio and water cut fluctuations, thereby impacting the production performances of the reservoir. Under competitive dissolution, the CH4 content in the gas phase increases, further confirming the complexity of interactions between CH4 and CO2. This model accurately reflects gas interactions during the CO2 flooding process.
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