{"title":"从分子角度洞察致密储层中二氧化碳充注的界面微结构和混溶行为","authors":"","doi":"10.1016/j.colsurfa.2024.135556","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, the interfacial microstructure of CO<sub>2</sub> flooding in tight reservoirs was investigated by molecular dynamics simulations. Initially, the study focused on four systems: membrane, cluster, dead-end and channel. The evolving properties of the oil-gas and oil-solid interfaces within the static swelling system were analyzed. By examining interaction energy and pressure curves, it was revealed that CO<sub>2</sub> permeability at the oil-gas interface and accumulation at the oil-solid interface play crucial roles in the swelling process, subsequently impacting competitive adsorption behaviors with alkanes. Secondly, the oil-gas interface characteristics of the dynamic driving system are analyzed through comparison of tangential and vertical drive. The mechanism underlying the degradation of miscibility is revealed by evaluating the interfacial thickness and energy. Moreover, the addition of different co-solvents identifies key influencing factors on miscible zone stability, which serve as an improvement for the subsequent miscible optimization. The study provides certain guiding significance for improving oil recovery in CO<sub>2</sub> flooding projects.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":null,"pages":null},"PeriodicalIF":4.9000,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Molecular insight into the interfacial microstructural and miscible behavior of CO2 flooding in tight reservoir\",\"authors\":\"\",\"doi\":\"10.1016/j.colsurfa.2024.135556\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>In this study, the interfacial microstructure of CO<sub>2</sub> flooding in tight reservoirs was investigated by molecular dynamics simulations. Initially, the study focused on four systems: membrane, cluster, dead-end and channel. The evolving properties of the oil-gas and oil-solid interfaces within the static swelling system were analyzed. By examining interaction energy and pressure curves, it was revealed that CO<sub>2</sub> permeability at the oil-gas interface and accumulation at the oil-solid interface play crucial roles in the swelling process, subsequently impacting competitive adsorption behaviors with alkanes. Secondly, the oil-gas interface characteristics of the dynamic driving system are analyzed through comparison of tangential and vertical drive. The mechanism underlying the degradation of miscibility is revealed by evaluating the interfacial thickness and energy. Moreover, the addition of different co-solvents identifies key influencing factors on miscible zone stability, which serve as an improvement for the subsequent miscible optimization. The study provides certain guiding significance for improving oil recovery in CO<sub>2</sub> flooding projects.</div></div>\",\"PeriodicalId\":278,\"journal\":{\"name\":\"Colloids and Surfaces A: Physicochemical and Engineering Aspects\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.9000,\"publicationDate\":\"2024-10-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Colloids and Surfaces A: Physicochemical and Engineering Aspects\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0927775724024208\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0927775724024208","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Molecular insight into the interfacial microstructural and miscible behavior of CO2 flooding in tight reservoir
In this study, the interfacial microstructure of CO2 flooding in tight reservoirs was investigated by molecular dynamics simulations. Initially, the study focused on four systems: membrane, cluster, dead-end and channel. The evolving properties of the oil-gas and oil-solid interfaces within the static swelling system were analyzed. By examining interaction energy and pressure curves, it was revealed that CO2 permeability at the oil-gas interface and accumulation at the oil-solid interface play crucial roles in the swelling process, subsequently impacting competitive adsorption behaviors with alkanes. Secondly, the oil-gas interface characteristics of the dynamic driving system are analyzed through comparison of tangential and vertical drive. The mechanism underlying the degradation of miscibility is revealed by evaluating the interfacial thickness and energy. Moreover, the addition of different co-solvents identifies key influencing factors on miscible zone stability, which serve as an improvement for the subsequent miscible optimization. The study provides certain guiding significance for improving oil recovery in CO2 flooding projects.
期刊介绍:
Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena.
The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.