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P.G. Ranjith, M.S.A. Perera and E. Khan A study of safe CO2 storage capacity in saline aquifers: a numerical study International Journal of Energy Research 37

Version of Record online: 1 OCT 2012 | DOI: 10.1002/er.2954

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CO2 sequestration in saline aquifers can be successfully modeled using the COMET 3 numerical simulator. According to the model results, CO2 storage capacity in saline aquifers increases with increasing injection pressure and reducing aquifer depth (by the selection of a shallow aquifer) and temperature (by reducing the depth). Cap rock failure can occur at 19.55 MPa CO2 injection pressure for a 1000m×1000m×184m saline aquifer, when the depth, temperature and salinity level are 800 m, 37 °C and 100,000 ppm, respectively. However, this optimum safe injection pressure into the saline aquifer depends on the aquifer's properties. Of these, aquifer depth has the maximum influence on optimum CO2 injection pressure, and the temperature and salinity level of the aquifer have negligible influence.

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