Influence of supercritical carbon dioxide on the chemical characteristics and mineral facies of sandstone

• Main Authors: Huan-WenLin, 林奐彣
• Other Authors: Jiin-Shuh Jean
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/dwzg68

碩士 === 國立成功大學 === 地球科學系碩士在職專班 === 104 === This research aims at understanding the effects of chemical characteristics and mineral facies of sandstone and formation water from the simulation experiments of rock-water- supercritical CO2 interaction. This is to assess if the toxic trace elements can be dissolved and released into formation water from sandstone in the CO2 storage layer after CO2 geological sequastration, resulting in affecting of groundwater quality. The experimental results revealed that the concentrations of Cd and Pb in water exceed the national drinking primary standard as a result of sandstone- 26.3 ‰ salinity water- supercritical CO2 interaction after 40 d of sandstone immersion and 20 d of interaction. In addition, Mn concentration exceed the national drinking secondary standard after 40 d of sandstone immersion and 20 d and 80 d of interaction. Similarly, the concentrations of Cd and Pb in water exceed the national drinking primary standard and those of Mn in water exceed the national drinking secondary standard as a result of sandstone - salinity water- supercritical CO2 interaction after 40 d of sandstone immersion and 20 d and 80 d of interaction.