Hydromechanical analysis of the second hydraulic stimulation in well PX-1 at the Pohang fractured geothermal reservoir, South Korea

Abstract In this study, we investigate numerically the hydro-mechanical behavior of fractured crystalline rock due to one five hydraulic stimulations at Pohang Enhanced Geothermal site in South Korea. We use commercial code FracMan (Golder Associates) that enables studying coupled processes media three dimensions combining finite element method with a discrete fracture network. The software is used simulate fluid pressure perturbation fractures during stimulation. Our numerical simulation shows history matching can be obtained by partitioning treatment into separate phases. This results adjusted stress-aperture relationships. evolution aperture adjustment implies stimulation mechanism could combination fracturing and shearing. simulated extent 0.01?MPa overpressure contour end equals ?180?m around injection point.