Discrete Fracture Network modeling workflow using geological constraints for deep geothermal in volcanic context

Abstract

Summary In this study, we propose a forward DFN modeling workflow to produce realistic fracture networks in volcanic environments for subsequent geothermal resource assessment. The DFN modeling uses geological constraints to drive the fracture distribution and characteristics. The work is illustrated using a simple synthetic model, although similar approaches have been used in the case of real projects. The fracture model parameters are presented together with the modeling results for each fracture sets. In particular, the host formation is deformed by the intrusion emplacement and fractures representing the layers folding, the intrusion pressure mechanical effect and the thermal cooling effect. Additional fractures have been added in relation to the fault slipping and the fault damage zone.