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Table 2 Geometry and material properties used in the modeling of circulation and shut-in

From: Temperature log simulations in high-enthalpy boreholes

PropertyUnitValue
Formation temperature at the surface°C20
Bottom-hole temperature°C245
Formation rock densitykg/m32650
Formation thermal conductivityW/(m  °C)2.92
Formation specific heat capacityJ/(kg  °C)1000
Well depthm2500
Well radiusm0.15
Water injection rate (Qinj)kg/s20 (first 10 days); 0 (after 10 days)
Water injection temperature (Tinj)°C20
The geothermal gradient°C/m0.09
Water specific heat capacityJ/(kg  °C)3160
Water thermal conductivityW/(m  °C)0.6