Water density

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Water density

Water density

The density of formation water (brine) at standard conditions (14.7psia & 60°F)[1]

 \rho_{wSC} = C_{mg/l}/25000 + 62.428

The density of formation water (brine) at reservoir conditions [1]

 \rho_{wR}=\rho_{wSC}/B_w

Example. Calculating formation water density

Example source [1]

Input data

 C_{mg/l} = 74289.3
 B_w = 1.022 at 3176 psia and 165°F

Estimate the density of the brine at standard conditions (14.7psia & 60°F) and at 3176 psia and 165°F?

Solution

 \rho_{wSC} = 74289.3/25000 + 62.428 = 65.4 lb_m/ft^3
 \rho_{wR} = 65.4/1.022=  64 lb_m/ft^3

Nomenclature

 B_w = water formation volume factor, res bbl/STB
 C_{mg/l} = water salinity or solids concentration, mg/l
 \rho_{wSC} = water density at standard conditions, lbm/ft3

See also

Water solids concentration

References

  1. 1.0 1.1 1.2 McCain, W.D. Jr. (1990). Properties of Petroleum Fluids (2 ed.). Oklahoma: PennWell Corp. ISBN 978-0878143351. 

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