Number

Drilling fluid

1 h/mm⁻²

2 h/mm⁻²

3 h/mm⁻²

4 h/mm⁻²

0#

Amine-based polymer drilling fluid

21.7

27.2

33.6

38.5

1#

Amine-based polymer drilling fluid+0.2% CaCl₂

23.8

29.1

35.7

42.3

2#

Amine-based polymer drilling fluid+0.5% CaCl₂

24.6

30.4

36.2

48.2

3#

Amine-based polymer drilling fluid+0.8% CaCl₂

25.3

31.3

39.8

50.3

4#

Amine-based polymer drilling fluid+1.0% CaCl₂

27.4

33.3

41.3

56.7