Invasion fluid

Experimental data

Invasion/%

Sw2/1

Flowback/%

Qo/(μl∙min-1)

Nca (×10−5)

Water

12.14

0.004

96.97

2.949

2.855

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

Non-ionic 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

Anionic surfcatant

13.44

0.008

94.04

3.493

57.52

23.20

0.016

92.97

3.702

60.96

31.47

0.053

83.15

3.126

51.47

48.77

0.080

83.70

2.910

47.92