Difference between revisions of "Water formation volume factor"

From wiki.pengtools.com
Jump to: navigation, search
(Created page with "__TOC__ ==Water formation volume factor== Handy equation to get the formation water (brine) salinity from the density at standard conditions obtained by the data regression wi...")
 
(Water formation volume factor)
Line 1: Line 1:
 
__TOC__
 
__TOC__
 
==Water formation volume factor==
 
==Water formation volume factor==
Handy equation to get the formation water (brine) salinity from the density at standard conditions obtained by the data regression with a stage line.
+
The water formation volume factor represents the change in volume of the brine as it is transported from the reservoir conditions to surface conditions<ref name= M1990/>.
  
[[File:Water salinity from density equation.png|thumb|right|600px|Water salinity from density equation <ref name= M1990/>]]
+
The units are reservoir barrels per surface barrel at standard conditions, res bbl/STB.
 +
 
 +
[[File:Water formation volume factor.png|thumb|right|600px|Water formation volume factor]]
  
 
==Math and Physics==
 
==Math and Physics==

Revision as of 05:45, 1 October 2020

Water formation volume factor

The water formation volume factor represents the change in volume of the brine as it is transported from the reservoir conditions to surface conditions[1].

The units are reservoir barrels per surface barrel at standard conditions, res bbl/STB.

Water formation volume factor

Math and Physics

 C_{mg/l} = 25000 \times (SG_w - 1) \times 62.428

Example. Calculating water salinity from density

Example source [1]

Input data

\rho_w = 65.4 lbm/ft3

Calculate water salinity in weight percent solids?

Solution

 SG_w = \rho_w/62.428=1.0476
 C_{mg/l} = 25000 (1.0476 - 1) 62.428 = 74289.32
 C_{ppm} = 74289.32 / 1.0476 = 70913.8
 C_W = 70913.8 / 10000 = 7.1 %

Nomenclature

 C_{ppm} = water salinity / solids concentration, ppm
 C_{mg/l} = water salinity / solids concentration, mg/l
 C_W = weight percent solids, %
 SG_w = water specific gravity, dimensionless

See also

Water solids concentration

References

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