考虑水相中CH_(4)与CO_(2)竞争溶解的CO_(2)驱油数值模拟  

Numerical Simulation Method of CO_(2) EOR Considering the Competitive Dissolution of CH_(4) and CO_(2) in the Aqueous Phase

作　　者：赵文越 桑国强[2,3] 肖喆煜 第五鹏祥 胡帅 ZHAO Wenyue;SANG Guoqiang;XIAO Zheyu;DIWU Pengxiang;HU Shuai(College of Mathematics and Computer Science,Chifeng University,Chifeng 024000,China;Research Institute of Petroleum Exploration&Development,PetroChina,Beijing 100083,China;State Key Laboratory of Enhanced Oil and Gas Recovery,Beijing 100083,China;College of Science,China University of Petroleum(Beijing),Beijing 102249,China;Greatwall Drilling Company(GWDC),CNPC,Beijing 102249,China)

机构地区：[1]赤峰学院数学与计算机科学学院,赤峰024000 [2]中国石油勘探开发研究院,北京100083 [3]提高油气采收率全国重点实验室,北京100083 [4]中国石油大学(北京)理学院,北京102249 [5]中国石油集团长城钻探工程有限公司,北京102249

出　　处：《华南师范大学学报（自然科学版）》2024年第4期19-26,共8页Journal of South China Normal University(Natural Science Edition)

基　　金：国家重点研究计划项目(2018YFB0605500);中国石油重大科技专项(2023ZZ0410);赤峰市自然科学科研课题(SZR2023006)。

摘　　要：为明确CO_(2)和CH_(4)在水相中的相互作用及其竞争溶解对油藏CO_(2)驱油过程的影响,建立了考虑CO_(2)和CH_(4)竞争溶解的CO_(2)驱数值模拟模型,该模型修正了不同CO_(2)浓度下CH_(4)的溶解度,并改进了表征CH_(4)溶解能力的平衡常数。模拟结果表明:在CO_(2)和CH_(4)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CH_(4)质量分数增加,进一步证实了CH_(4)与CO_(2)之间相互作用的复杂性。该模型可以真实反映CO_(2)驱油过程中的气体相互作用。To investigate the interactions between CO_(2) and CH_(4) in aqueous phase and their competitive dissolution effects on CO_(2)-enhanced oil recovery processes,a numerical simulation model incorporating the competitive dissolution of CO_(2) and CH_(4) was developed.The established model modifies the solubility of CH_(4) at different CO_(2) 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 CH_(4) content in the gas phase increases,further confirming the complexity of interactions between CH_(4) and CO_(2).This model accurately reflects gas interactions during the CO_(2) flooding process.

关 键 词：竞争溶解 CO_(2)驱油 数值模拟 生产动态 

分 类 号：TE319[石油与天然气工程—油气田开发工程]