Toward physical aspects affecting a possible leakage of geologically stored CO2 into the shallow subsurface
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In geological formations, migration of CO2 plume is very complex and irregular. To make CO2 capture and storage technology feasible, it is important to quantify CO2 amount associated with possible leakage through natural occurring faults and fractures in geologic medium. Present work examines the fracture aperture effect on CO2 migration due to free convection. Numerical results reveal that fracture with larger-aperture intensify CO2 leakage. Mathematical formulation and equations of state for the mixture are implemented within the object-oriented finite element code OpenGeoSys developed by the authors. The volume translated Peng–Robinson equation of state is used for material properties of CO2 and water.
KeywordsFracture OpenGeoSys Free convection Sorption Leakage Translated volume
We acknowledge the funding by the German Federal Ministry of Education and Research (BMBF) within the framework of the CO2BENCH (FKZ 03G0797D) project as a part of the Special Program GEOTECHNOLOGIEN.
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