Water viscosity

Water viscosity

The formation water (brine) isothermal viscosity correlation is published by McCain in 1991.

Water viscosity

Math and Physics

$\mu_{w1} = AT^{-B}$

where

$A = 109.574 - 8.40564 C_W + 0.313314 C_W^2 + 0.00872213 C_W^3$

$B = -1.12166 + 0.0263951 C_W - 0.000679461 C_W^2 - 5.47119e-5 C_W^3 + 1.55586e-6 C_W^4$

$\mu_{w} = \mu_{w1} (0.9994 + 4.0295e-5\ P + 3.1062e-9\ P^2$

Application range

The correlation is valid only for temperatures between 200 and 270F, pressures of 1000 to 20000 psia, and salinities up to 200000 mg/l.

Discussion

We, at pengtools.com, are calculating water compressibility below the bubble point with the same equation at the moment.

Example. Calculating water isothermal compressibility

Example source

Input data

$C_{mg/l} = 74289.3$

Calculate water isothermal compressibility at 3500 psia and 165°F?

Solution

$c_w = 2.6348E-6\ psia^{-1}$

Nomenclature

$C_{mg/l}$ = pressure correction, res bbl/STB

$C_{mg/l}$ = water salinity or solids concentration, mg/l

$P$ = pressure, psia

$T$ = Temperature, °F

See also

Water solids concentration