J4 ›› 2012, Vol. 42 ›› Issue (3): 821-826.

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Experiment on Mechanism of CO2 Fluid Interacting with |Sandstone Layer

Zhang Feng-jun1, Wang Huai-yuan1, Wang Guang-hua1, Yang Xiao-ying1, Wang Tian-ye1, Liu Na2   

  1. 1.Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun130021, China;
    2.College of Earth Sciences, Jilin University, Changchun130061, China
  • Received:2011-06-24 Online:2012-05-26 Published:2012-05-26

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Abstract:

Due to the chemical interaction of the minerals with CO2 stored in underground rock formations, the secondary carbonate minerals precipitated and stored in rock formations in long term. As such so, the concentration of CO2 decreasingly discharged into the air. In this study, the mechanisms of the interaction of CO2, H2O and sandstone in different temperatures were investigated. Moreover, the scanning electron microscope (SEM), the weight lost and the variation of total mineralization were analyzed. The results showed that the erosion of sandstone increased with increasing temperature and the calcite and dolomite produced at 100 ℃and 175 ℃. The new minerals dissolved when the temperature increased up to 250 ℃. In general, the results in this study demonstrated that the CO2 could be stored as carbonate minerals in underground rock formations and the optimal temperature is 175 ℃.

Key words: CO2, sandstone, solution, precipitation

CLC Number: 

  • X54
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