Numerical Simulation Method of CO2 EOR Considering the Competitive Dissolution of CH4 and CO2 in the Aqueous Phase

ZHAO Wenyue; SANG Guoqiang; XIAO Zheyu; DIWU Pengxiang; HU Shuai

doi:10.6054/j.jscnun.2024046

Journal of South China Normal University (Natural Science Edition) > 2024 > 56(4): 19-26. > DOI: 10.6054/j.jscnun.2024046

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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Numerical Simulation Method of CO₂ EOR Considering the Competitive Dissolution of CH₄ and CO₂ in the Aqueous Phase

1.
College of Mathematics and Computer Science, Chifeng University, Chifeng 024000, China
2.
Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China
3.
State Key Laboratory of Enhanced Oil and Gas Recovery, Beijing 100083, China
4.
College of Science, China University of Petroleum (Beijing), Beijing 102249, China
5.
Greatwall Drilling Company (GWDC), CNPC, Beijing 102249, China

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Received Date: March 29, 2024

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Abstract

Abstract

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.
- competitive dissolution,
- CO₂ flooding,
- numerical simulation,
- production performance

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References (17)

References

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