Fluid

T₁

(ms)

T₂

(ms)

Typical

T₁/T₂

HI

η (cp)

D₀ × 10⁻⁵

(cm²/s)

Brine

1 - 500

1 - 500

2

1

0.2 - 0.8

1.8 - 7

Oil

3000 - 4000

300 - 1000

4

1

0.2 - 1.000

0.0015 - 7.6

Gas

4000 - 5000

30 - 60

80

0.2 - 0.4

0.011 - 0.014

methane

80 - 100