Table 6:
The plugging capacity of Cr
3+
/APP5 plugging agent.
Number
Plugging agent state
Injected volume
Permeability to water(10
-3
μm
2
)
Plugging efficiency
PV
K
a
K
b
%
1
New
0.3
1019
127
87.53
2
0.3
1052
119
88.69
3
After 30 days
0.3
1147
247
78.46
4
0.3
1773
401
77.38