Water compressibility

Water compressibility

The formation water (brine) isothermal compressibility data is published in 1990 by McCain.

Water compressibility data

Math and Physics

At pressures above bubble point:

$c_w = 1 / (7.033 P + 0.5415 C_{mg/l} - 537 T + 403300)$

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