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考虑水相中CH4与CO2竞争溶解的CO2驱油数值模拟

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为明确CO2和CH4在水相中的相互作用及其竞争溶解对油藏CO2驱油过程的影响,建立了考虑CO2和CH4竞争溶解的CO2驱数值模拟模型,该模型修正了不同CO2浓度下CH4的溶解度,并改进了表征CH4溶解能力的平衡常数.模拟结果表明:在CO2和CH4竞争溶解作用下,气体组分的分布发生了显著变化,影响气油比和含水率的波动,进而对油藏生产动态产生影响.在竞争溶解作用下,气相中CH4质量分数增加,进一步证实了 CH4与CO2之间相互作用的复杂性.该模型可以真实反映CO2驱油过程中的气体相互作用.
Numerical Simulation Method of CO2 EOR Considering the Competitive Dissolution of CH4 and CO2 in the Aqueous Phase
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 disso-lution of CO2 and CH4 was developed.The established model modifies the solubility of CH4 at different CO2 concen-trations and improves the equilibrium constants that characterize methane solubility.Simulation results indicate sig-nificant 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 dissolu-tion,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 dissolutionCO2 floodingnumerical simulationproduction performance

赵文越、桑国强、肖喆煜、第五鹏祥、胡帅

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赤峰学院数学与计算机科学学院,赤峰 024000

中国石油勘探开发研究院,北京 100083

提高油气采收率全国重点实验室,北京 100083

中国石油大学(北京)理学院,北京 102249

中国石油集团长城钻探工程有限公司,北京 102249

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竞争溶解 CO2驱油 数值模拟 生产动态

国家重点研究计划项目中国石油重大科技专项赤峰市自然科学科研课题

2018YFB06055002023ZZ0410SZR2023006

2024

华南师范大学学报(自然科学版)
华南师范大学

华南师范大学学报(自然科学版)

CSTPCD北大核心
影响因子:0.413
ISSN:1000-5463
年,卷(期):2024.56(4)
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