Invasion fluid

Chip-flooding Experimental data

Invasion/%

Sw2/1

Flowback/%

Qo/ (μl∙min−1)

Nca (×10−5)

Water

12.14

0.004

96.97

2.949

2.855

16.65

0.031

81.43

3.255

3.151

20.45

0.007

97.71

4.366

4.226

39.65

0.141

64.40

1.801

1.743

45.11

0.353

21.66

0.000

0.000

Surfactant

11.61

0.023

80.00

2.468

48.97

17.21

0.040

76.84

2.800

55.56

42.46

0.158

62.72

2.186

43.37

48.61

0.196

59.68

1.260

25.00