CO2 storage in heterogeneous aquifer: A study on the effect of injection rate and CaCO3 concentration

10th Curtin University Technology Science and Engineering International Conference

自然科学;工业技术

Raza, A.^1 ; Rezaee, R.^2 ; Bing, C.H.^1 ; Gholami, R.^1 ; Nagarajan, R.^1 ; Hamid, M.A.^1

Faculty of Engineering and Science, Curtin University, Sarawak, Miri, Malaysia^1

Faculty of Science and Engineering, Curtin University, Bentley

WA

6102, Australia^2

关键词: CO2 storage;    Geologic storage;    Heterogeneous aquifers;    High injection;    Injection rates;    Injectivity;    Pore fluids;    Trapping mechanisms;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/121/1/012023/pdf
DOI  :  10.1088/1757-899X/121/1/012023

来源: IOP

【 摘 要 】

Trapping mechanisms taken place during and after CO2injection in a geologic storage medium are impacted by a number of parameters including injection rates together with rock and pore fluid compositions. There have been many studies on the factors controlling the capillary trapping and injectivity of CO2storage sites. However, there are only few works carried out discussing on the effect of flow rate and rock and fluids compositions in controlling the trapping mechanisms. In this paper a CO2storage site located in a heterogeneous aquifer is simulated to investigate the efficiency of structural, capillary and dissolution trappings as a function of injection rate and concentration of calcium carbonate. The results obtained from numerical analysis indicated that CO2injection must be made within an optimum injection rate for having an effective storage in place. It was also found that concentration of CaCO3is an important parameter to consider during the analysis as it drastically controls the fate of trapping mechanisms at high injection rates.