Geochemical modeling of changes in caprock permeability caused by CO2–brine–rock interactions under the diffusion mechanism
作者： Xin Ma , Guodong Yang , Xufeng Li , Ying Yu , Jianxing Dong
DOI: 10.2516/OGST/2019055
关键词:
摘要: Geologic Carbon Sequestration (GCS) has been widely considered as a significant means for reducing CO2 emissions to address global climate change. The caprock sealing plays key role in determining permanence and security of carbon dioxide (CO2 ) storage geologic formations. This study presents geochemical modeling –brine–rock interactions deep saline aquifer the Jianghan Basin, which is potential target injection geological storage. A one-dimensional model was developed investigate changes permeability caused by under diffusion mechanism. results show that dissolution K-feldspar albite variation permeability, makes increased 60% at bottom caprock. with temperature enhancing minerals caprocks. In addition, common-ion effect generated salinity inhibits
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