|
Core No.
|
Initial water saturation, %
|
Initial oil saturation, %
|
Residual oil saturation after hot water injection, %
|
Residual oil saturation after chemical surfactant injection, %
|
% of heavy oil recovery enhancement
|
|---|
|
1
|
11.0
|
89.0
|
91.5
|
89.0
|
2.5
|
|
3
|
10.5
|
89.5
|
83.0
|
75.0
|
8.0
|
|
5
|
12.0
|
88.0
|
95.8
|
94.4
|
1.4
|
|
7
|
10.0
|
90.0
|
57.0
|
46.0
|
11.0
|