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

Table 3

Scheme for determining the optimal plugging flow rate.

Test number	Water-cement ratio	Injection pressure (MPa)	Hydrodynamic velocity (m·s^−1)
1-1a/1b	0.8 : 1	0.1	0.15
1-2a/2b	0.8 : 1	0.2	0.35
1-3a/3b	0.8 : 1	0.3	0.25
1-4a/4b	1 : 1	0.2	0.25
1-5a/5b	1 : 1	0.3	0.15
1-6a/6b	1 : 1	0.1	0.35
1-7a/7b	1.5 : 1	0.3	0.35
1-8a/8b	1.5 : 1	0.1	0.25
1-9a/9b	1.5 : 1	0.2	0.15