Water bubble point pressure

Water bubble point pressure

The bubble point of a gas-saturated formation water (brine) is equal to the bubble point pressure of coexisting oil .

The two are equal because of thermodynamic equilibrium between the brine and the oil.

Math and Physics

$C_{ppm} = \frac{gram\ solid}{10^6\ gram\ water}$

$C_{mg/l} = \frac{milligram\ solid}{litre\ water}$

$C_W = \frac{gram\ solid}{100\ gram\ water}$

Conversions

$C_{mg/l} = C_{ppm}\ SG_w$

Often, parts per million and milligrams per liter are used interchangeably. This is correct only if the density of the brine at standard conditions can be assumed to be 1 g/cc ( 1000 kg/m3, SG_w=1, 62.428 lbm/ft3) .

$C_W = C_{ppm}/10000$

Nomenclature

$C_{ppm}$ = water salinity or solids concentration, ppm

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

$C_W$ = water salinity or weight percent solids, %

$SG_w$ = water specific gravity, dimensionless

See also

Water salinity from density equation