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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

Property

Unit

Value

Formation temperature at the surface

°C

20

Bottom-hole temperature

°C

245

Formation rock density

kg/m3

2650

Formation thermal conductivity

W/(m  °C)

2.92

Formation specific heat capacity

J/(kg  °C)

1000

Well depth

m

2500

Well radius

m

0.15

Water injection rate (Qinj)

kg/s

20 (first 10 days); 0 (after 10 days)

Water injection temperature (Tinj)

°C

20

The geothermal gradient

°C/m

0.09

Water specific heat capacity

J/(kg  °C)

3160

Water thermal conductivity

W/(m  °C)

0.6