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

Table 6

Reverse diffusion distances in the 70 mm diameter pipe.

Factor	Water-cement ratio (W/C)	Hydrodynamic velocity (m·s^−1)	Injection pressure (MPa)
K1	1770	2470	1510
K2	1900	1500	1720
K3	1300	1030	1740
k1	590	813	503
k2	633	500	573
k3	433	343	580
Range	157	470	80
Primary and secondary factor	Hydrodynamic velocity > water-cement ratio > injection pressure