Difference between revisions of "Gas/Water Interfacial Tension"

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[[Gas/Water Interfacial Tension]] correlation was published by '''Baker and Swerdloff''' in '''1956'''.
 
[[Gas/Water Interfacial Tension]] correlation was published by '''Baker and Swerdloff''' in '''1956'''.
  
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[[File:Gas/Water Interfacial Tension.png|thumb|right|400px|Gas/Water Interfacial Tension correlation in the PVT software at pengtools.com]]
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[[File:Gas-Water Interfacial Tension.png|thumb|right|400px|Gas/Water Interfacial Tension correlation in the PVT software at pengtools.com]]
  
 
==Math and Physics==
 
==Math and Physics==
  
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:<math> \sigma_{68} =39 - 0.2571 SG_{oAPI}</math>
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:<math> \sigma_{74} =75 - 1.108P^{0.349}</math>
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:<math> \sigma_{100} =37.5 - 0.2571 SG_{oAPI}</math>
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:<math> \sigma_{280} =53-0.1048P^{0.637}</math>
  
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:<math> At\ T<68F,\  \sigma_{od}=\sigma_{68}</math>
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:<math> At\ T<74F,\  \sigma_w=\sigma_{74}</math>
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:<math> At\ 68F<T<100F,\  \sigma_{od}=\frac{\sigma_{68} + (T - 68) * (\sigma_{100} - \sigma_{68})}{ (100 - 68)}</math>
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:<math> At\ 74F<T<280F,\  \sigma_w=\frac{\sigma_{74} + (T - 74) * (\sigma_{280} - \sigma_{74})}{ (280 - 74)}</math>
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:<math>At\ T>100F,\ \sigma_{od}=\sigma_{100}</math>
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:<math>At\ T>280F,\ \sigma_w=\sigma_{280}</math>
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:<math> \sigma_{o}=\sigma_{od} \times (1-0.24P^{0.45})</math>
 
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The interfacial tension becomes zero at miscibility pressure.  1 dyne/cm is used for calculations, then it becomes less than 1.
 
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:<math> if (\sigma_{o}<1) \sigma_{o}=1</math>
 
  
 
== Nomenclature  ==
 
== Nomenclature  ==
 
:<math> P </math> = pressure, psia
 
:<math> P </math> = pressure, psia
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:<math> \sigma_{o} </math> = gas/oil interfacial tension, dynes/cm
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:<math> \sigma_w </math> = gas/water interfacial tension, dynes/cm
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:<math> \sigma_{od} </math> = gas/oil interfacial tension for dead oil, dynes/cm
 
 
:<math> T </math> = temperature, °F
 
:<math> T </math> = temperature, °F
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 +
==See also==
 +
:[[Gas/Oil Interfacial Tension]]<br/>
 +
:[[Gas/Water Interfacial Tension]]
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:[[Water bubble point pressure]]<BR/>
 +
:[[Water compressibility]]<BR/>
 +
:[[Water density]]<BR/>
 +
:[[Water formation volume factor]]<BR/>
 +
:[[Water salinity from density equation]]<BR/>
 +
:[[Water solids concentration]]<BR/>
 +
:[[Water viscosity]]<BR/>
  
 
== References ==
 
== References ==
−
Baker, O. and Swerdloff, W. 1955. Calculation of Surface Tension 3—Calculating parachor Values. Oil Gas J. (5 December 1955): 141.
+
Baker, O. and Swerdloff, W. 1955. Calculation of Surface Tension 3—Calculating parachor Values. Oil Gas J. (5 December 1955): 141.<br/>
 
Baker, O. and Swerdloff, W. 1956. Calculation of Surface Tension 6—Finding Surface Tension of Hydrocarbon Liquids. Oil Gas J. (2 January 1956): 125.
 
Baker, O. and Swerdloff, W. 1956. Calculation of Surface Tension 6—Finding Surface Tension of Hydrocarbon Liquids. Oil Gas J. (2 January 1956): 125.
  

Latest revision as of 08:30, 5 October 2020

Gas/Water Interfacial Tension

Gas/Water Interfacial Tension correlation was published by Baker and Swerdloff in 1956.

Gas/Water Interfacial Tension correlation in the PVT software at pengtools.com

Math and Physics

\sigma_{74} =75 - 1.108P^{0.349}
\sigma_{280} =53-0.1048P^{0.637}
At\ T<74F,\ \sigma_w=\sigma_{74}
At\ 74F<T<280F,\ \sigma_w=\frac{\sigma_{74} + (T - 74) * (\sigma_{280} - \sigma_{74})}{ (280 - 74)}
At\ T>280F,\ \sigma_w=\sigma_{280}

Nomenclature

P = pressure, psia
\sigma_w = gas/water interfacial tension, dynes/cm
T = temperature, °F

See also

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

References

Baker, O. and Swerdloff, W. 1955. Calculation of Surface Tension 3—Calculating parachor Values. Oil Gas J. (5 December 1955): 141.
Baker, O. and Swerdloff, W. 1956. Calculation of Surface Tension 6—Finding Surface Tension of Hydrocarbon Liquids. Oil Gas J. (2 January 1956): 125.

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