化工学报Issue(10)：4155-4162,8.DOI:10.11949/j.issn.0438-1157.20150069
封存CO2裹挟可挥发性污染物的迁移模型分析
Analysis of migration model for volatile contaminants induced by CO2 geological storage
摘要
Abstract
In order to investigate characteristics of volatile contaminant release and migration during CO2 geological sequestration, a contaminant migration model with multiphase displacement process in a CO2-aqueous phase-residual oil phase system was proposed. Numerical simulations were performed to figure out the multiphase displacement and the contaminant migration, and further to explore the effects of interphase mass transfer, initial profiles of the residual oil and injection rates on the volatile contaminant migration. The results indicate that the volatile contaminant enters into the supercritical CO2 phase due to the multiphase displacement process, and migrates with the mobile phase in the subsurface formation. An interphase mass transfer region (IMTR) gradually forms. The evolution of IMTR directly reflects the release characteristics of contaminant and migration behaviors of CO2 coerced with contaminant. A larger interphase mass transfer coefficient results in a narrower IMTR and a faster decay rate of the oil phase. When the initial saturation of the oil phase is larger, the IMTR becomes much narrower and the oil phase decays much slower. With increasing CO2 injection rate, IMTR increases and the oil phase decays rapidly. The proposed model and the results intuitively describe the migration characteristics of the volatile contaminants in a variety of geological reservoirs during CO2 geological sequestration. The proposed model can also be used for the risk analysis and evaluations of CO2 storage.关键词
CO2/封存/多相流/驱替过程/相间传质/污染物迁移Key words
CO2/sequestration/multiphase flow/displacement process/interphase mass transfer/contaminant migration分类
化学化工引用本文复制引用
杨勇,刘永忠,于博,丁天..封存CO2裹挟可挥发性污染物的迁移模型分析[J].化工学报,2015,(10):4155-4162,8.基金项目
国家自然科学基金项目（21176198）；教育部博士点基金项目（20120201110071）。@@@@supported by the National Natural Science Foundation of China (21176198) and Doctoral Fund of Ministry of Education of China (20120201110071) （21176198）
