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论文类型：期刊论文

发表时间：2018-04-01

发表刊物：HEAT AND MASS TRANSFER

收录刊物：SCIE、EI

卷号：54

期号：4

页面范围：1217-1224

ISSN号：0947-7411

摘要：To study on microscale distribution of CO2 and brine during two-phase flow is crucial for understanding the trapping mechanisms of CO2 storage. In this study, CO2-brine flow experiments in porous media were conducted using X-ray computed tomography. The porous media were packed with glass beads. The pore structure (porosity/tortuosity) and flow properties at different flow rates and flow fractions were investigated. The results showed that porosity of the packed beads differed at different position as a result of heterogeneity. The CO2 saturation is higher at low injection flow rates and high CO2 fractions. CO2 distribution at the pore scale was also visualized. a... Porosity of porous media CT (brine_sat) grey value of sample saturated with brine CT (dry) grey value of sample saturated with air CT (brine) grey value of pure brine CT (air) grey value of pure air CT (flow) grey values of sample with two fluids occupying the pore space grey value of sample saturated with CO2 CO2 fraction the volume flow rate for CO2 q (brine) the volume flow rate for brine L Thickness of the porous media, mm L (e) a bundle of capillaries of equal length, mm tau Tortuosity, calculated from L (e) / L.