Molecular insight into the interfacial microstructural and miscible behavior of CO2 flooding in tight reservoir

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2024-10-14 DOI:10.1016/j.colsurfa.2024.135556

{"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}

引用次数: 0

Abstract

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.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

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

本研究通过分子动力学模拟研究了致密储层中二氧化碳淹没的界面微观结构。研究最初集中在四个系统上：膜系统、集束系统、死角系统和通道系统。研究分析了静态膨胀体系中油气界面和油固界面的演化特性。通过研究相互作用能量和压力曲线，发现二氧化碳在油气界面的渗透性和在油固界面的累积性在溶胀过程中起着至关重要的作用，进而影响到与烷烃的竞争吸附行为。其次，通过比较切向驱动和垂直驱动，分析了动态驱动系统的油气界面特性。通过评估界面厚度和能量，揭示了混溶性下降的机理。此外，通过添加不同的助溶剂，确定了混溶区稳定性的关键影响因素，为后续的混溶优化提供了改进依据。该研究为提高二氧化碳淹没项目的石油采收率提供了一定的指导意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

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.