Difference between revisions of "Water density"

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(Created page with "__TOC__ ==Water density== thumb|right|600px|Water density The density of formation water (brine) at standard conditions (14.7psia & 60°F)<ref name...")
 
 
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__TOC__
 
__TOC__
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==Water density==
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==Formation water density==
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[[File:Water density.png|thumb|right|600px|Water density]]
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[[File:Water density.png|thumb|right|400px|Water density correlation in the PVT software at pengtools.com]]
  
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The density of formation water (brine) at standard conditions (14.7psia & 60°F)<ref name= M1990/>
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The density of formation water (brine) at standard conditions (14.7psia & 60°F):
  
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:<math> \rho_{wSC} = C_{mg/l}/25000 + 62.428</math>
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:<math> \rho_{wSC} = C_{mg/l}/25000 + 62.428</math><ref name= M1990/>
  
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The density of formation water (brine) at reservoir conditions <ref name= M1990/>
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The density of formation water (brine) at reservoir conditions:
  
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:<math> \rho_{wR}=1/B_w </math>
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:<math> \rho_{wR}=\rho_{wSC}/B_w </math><ref name= M1990/>
  
 
==Example. Calculating formation water density ==
 
==Example. Calculating formation water density ==
 
Example source <ref name= M1990/>
 
Example source <ref name= M1990/>
 
===Input data===
 
===Input data===
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:<math> \C_W = 7.1%</math>
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:<math> C_{mg/l} = 74289.3 </math>
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:<math> B_w = 1.022 </math> 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?  
 
Estimate the density of the brine at standard conditions (14.7psia & 60°F) and at 3176 psia and 165°F?  
  
 
===Solution===
 
===Solution===
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:<math> \Delta V_{wP} = -0.0047241</math>
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:<math> \rho_{wSC} = 74289.3/25000 + 62.428 = 65.4 lb_m/ft^3</math>
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:<math> \Delta V_{wT} = 0.027</math>
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:<math> \rho_{wR} = 65.4/1.022=  64 lb_m/ft^3</math>
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:<math> B_w = 1.022</math>
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The solution is also available in the PVT software model at [The solution is available in the PVT calculator software model at [https://www.pengtools.com/pvtCalculator?paramsToken=d0f0c9c587152cefc27d1217e091ace0 www.pengtools.com]
  
 
== Nomenclature  ==
 
== Nomenclature  ==
 
:<math> B_w </math> = water formation volume factor, res bbl/STB
 
:<math> B_w </math> = water formation volume factor, res bbl/STB
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:<math> P </math> = pressure, psia
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:<math> C_{mg/l} </math> = water salinity or solids concentration, mg/l
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:<math> T </math> = Temperature, °F
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:<math> \rho_{wSC} </math> = water density at standard conditions, lb<sub>m</sub>/ft<sup>3</sup>
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:<math> \Delta V_{wP} </math> = pressure correction, res bbl/STB
 
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:<math> \Delta V_{wT} </math> = temperature correction, res bbl/STB
 
  
 
==See also==
 
==See also==
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:[[Water bubble point pressure]]<BR/>
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:[[Water compressibility]]<BR/>
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:[[Water density]]<BR/>
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:[[Water formation volume factor]]<BR/>
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:[[Water salinity from density equation]]<BR/>
 
:[[Water solids concentration]]<BR/>
 
:[[Water solids concentration]]<BR/>
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:[[Water viscosity]]<BR/>
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:[[Gas/Water Interfacial Tension]]
 
== References ==
 
== References ==
 
<references>
 
<references>
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  |ISBN=978-0878143351
 
  |ISBN=978-0878143351
 
}}</ref>
 
}}</ref>
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<ref name=M1991>{{cite journal
 
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|last1=McCain|first1=W.D. Jr.
 
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|title=Reservoir-Fluid Property Correlations-State of the Art
 
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|journal=Society of Petroleum Engineers
 
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|number=SPE-18571-PA
 
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|date=1991
 
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|url=https://www.onepetro.org/journal-paper/SPE-18571-PA
 
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|url-access=registration
 
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}}</ref>
 
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}}</ref>
 
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</references>
 
</references>
  

Latest revision as of 08:16, 5 October 2020

Formation water density

Water density correlation in the PVT software at pengtools.com

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

\rho_{wSC} = C_{mg/l}/25000 + 62.428[1]

The density of formation water (brine) at reservoir conditions:

\rho_{wR}=\rho_{wSC}/B_w [1]

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

The solution is also available in the PVT software model at [The solution is available in the PVT calculator software model at www.pengtools.com

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 bubble point pressure
Water compressibility
Water density
Water formation volume factor
Water salinity from density equation
Water solids concentration
Water viscosity
Gas/Water Interfacial Tension

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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