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    蒋兰兰

    • 教授     博士生导师   硕士生导师
    • 主要任职:Professor
    • 性别:女
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:能源与动力学院
    • 学科:能源与环境工程
    • 办公地点:能源与动力学院
    • 联系方式:0411-84708617
    • 电子邮箱:lanlan@dlut.edu.cn

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    Measurement and estimation of CO2-brine interfacial tension and rock wettability under CO2 sub- and super-critical conditions

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    论文类型:期刊论文

    第一作者:Mutailipu, Meiheriayi

    通讯作者:Liu, Y (reprint author), Dalian Univ Technol, Minist Educ, Key Lab Ocean Energy Utilizat & Energy Conservat, Dalian 116024, Peoples R China.

    合写作者:Liu, Yu,Jiang, Lanlan,Zhang, Yi

    发表时间:2019-01-15

    发表刊物:JOURNAL OF COLLOID AND INTERFACE SCIENCE

    收录刊物:SCIE、PubMed

    卷号:534

    页面范围:605-617

    ISSN号:0021-9797

    关键字:CO2 saline aquifer storage; Interfacial tension; Wettability; Contact angles; Drop shape analysis

    摘要:Saline aquifer storage is considered to be a promising method of carbon dioxide (CO2) mitigation. The CO2-brine interfacial tension (IFT) and the caprock wettability under reservoir temperature and pressure conditions are essential for storage capacity estimation. In this study, the CO2-brine (NaCl + KCl) IFTs were obtained by using the pendant drop method under 298-373 K temperature, 3-15 MPa pressure, and 1.0-4.9 mol.kg(-1) salinity. A detailed analysis of the relationship of IFT with temperature, pressure, and salinity was conducted. In addition, an empirical equation was developed to estimate the CO2-brine IFTs in a wide range of temperatures, pressures, and salt molality. The contact angles (CAs) of brine on quartz, Berea Sandstone, and limestone surfaces in the presence of supercritical, liquid, and gaseous CO2 were measured by using the sessile drop method, and the wettability alteration of the rock surfaces in the presence of supercritical CO2 was systematically investigated. According to the results, the CO(2-)brine IFfs increased with salinity and temperature and decreased with pressure until reaching a plateau. For a CO2-mixed brine system, a linear relationship between the IFT increase (Delta gamma) and molality was observed. The CAs of the different rock samples varied with temperature and pressure. However, all the three rock samples became less water-wet when the CO2 phase state changed from subcritical to supercritical. (C) 2018 Elsevier Inc. All rights reserved.