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Table 2

Basic data of experimental well L.S.U 7.

Parameter Value Unit
Inner diameter of casing 0.1243 m
Outer diameter of drilling string 0.073 m
Diameter of gas injection pipe 0.0254 m
Drilling fluid density 1.03 g/cm3
Well depth 1832.2 m
Pumping speed of killing 60 r/min
Surface temperature 23.9 °C
Reservoir thickness 1.9 m
Plastic viscosity of drilling fluid 0.0126 Pa s
Casing pressure at shut-in time 3.447 MPa
Gas void fraction 0.75

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