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论文类型：期刊论文

发表时间：2018-04-01

发表刊物：TRANSPORT IN POROUS MEDIA

收录刊物：SCIE

卷号：122

期号：3

页面范围：595-609

ISSN号：0169-3913

关键字：Displacement; Dissolution; CO2 saturation; Concentration; Dissolution rate

摘要：This study investigated the dynamic displacement and dissolution of in porous media at 313 K and 6/8 MPa. Gaseous () at 6 MPa and supercritical at 8 MPa were injected downward into a glass bead pack at different flow rates, following upwards brine injection. The processes occurring during drainage and brine imbibition were visualized using magnetic resonance imaging. The drainage flow fronts were strongly influenced by the flow rates, resulting in different gas distributions. However, brine imbibition proceeded as a vertical compacted front due to the strong effect of gravity. Additionally, the effects of flow rate on distribution and saturation were analyzed. Then, the front movement of dissolution was visualized along different paths after imbibition. The determined concentrations implied that little dissolved in brine after imbibition. The dissolution rate was from to and from to for at 6 MPa and at 8 MPa, respectively. The total time for the dissolution was short, indicating fast mass transfer between the and brine. Injection of under supercritical conditions resulted in a quick establishment of a steady state with high storage safety.