Discrete fracture network model of the vapor zone leakages at the Copahue geothermal field

摘要: Abstract The volcano-hosted geothermal system of Copahue is one the most promising resources renewable energy in Argentina. It driven by a layered reservoir composed steam cap above deep liquid-dominated reservoir. We study surficial leakages shallow zone performing discrete fracture network model and 3D forward strain-stress upper caprock unit. hydrothermal zones linked to are subordinated deep-rooted N60-striking faults. Associated damage exhibit higher values intensity, vertical anisotropy permeability than host rocks. Joints cross-joints likely control leakage zones, where formers subject high dilation tendency. Anfiteatro monocline might constitute northwestern boundary zone. Variations H2O–CO2 ratio, helium isotopic signature, CO2 between explained terms petrophysical properties ignimbrites changes their structural control. Our results suggest that ignimbrite avoids decompression because it provides low fractured layer seals system; conversely, affected extensional faults enhance vapor given its density permeability.