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Table 3

Major computational parameters of the gas well in Sichuan.

Parameter Value Unit
Initial gas flux 0.06 m3/s
Drilling fluid density 1.2 g/cm3
Weighted drilling fluid 1.4 g/cm3
H2S content 2%
Surface temperature 40 °C
Well depth 3000 m
Drilling speed 0.08 m/s
Reservoir permeability 40 mD
Reservoir thickness 2 m
Plastic viscosity of drilling fluid 0.03 Pa s
Yield value of drilling fluid 1.5 Pa
Mud displacement 20 L/s
Threshold value of pit gain 3 m3
Geothermal gradient 0.024 °C/m

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