Cement Slurry Plugging Law and Optimal Plugging Flow Rate at a High Hydraulic Gradient

Table 7

Reverse diffusion distances in the 50 mm diameter pipe.

Factor	Water-cement ratio (W/C)	Hydrodynamic velocity (m·s^−1)	Injection pressure (MPa)
K1	1270	1610	1080
K2	1580	1010	1130
K3	510	740	1150
k1	423	537	360
k2	527	337	377
k3	170	247	383
Range	253	290	230
Primary and secondary factor	Hydrodynamic velocity > water-cement ratio > injection pressure