PetrophysicsRock Properties
Adhesion Tension from Water-Oil Interfacial Tension Formula
Adhesion Tension from Water-Oil Interfacial Tension calculates adhesion tension for rock properties workflows in petrophysics.
How engineers use this formula
Use this formula when the listed inputs (sigma_wo, theta) are known and the assumptions behind the cited rock properties relationship match the engineering case being checked.
Assumptions
- Input values are representative for the well, reservoir, fluid, or equipment case being evaluated.
- The declared units match the field-unit constants used in the formula.
- The cited formula applies to the selected petroleum engineering workflow.
Limitations
- The calculation does not replace a full engineering model or operating procedure.
- Accuracy depends on the source correlation, assumptions, input quality, and unit consistency.
Common mistakes
- Mixing unit systems without converting the inputs.
- Using default example values as field recommendations.
- Applying the formula outside the source assumptions.
Default example
Using the default inputs, tau equals 20 dyn/cm.
sigma_wodyn/cm
40
thetadegree
60
Inputs
sigma_wo
dyn/cmWater-Oil Interfacial Tension
theta
degreeContact Angle
Outputs
tau
dyn/cm
Adhesion Tension
sigma_wo
dyn/cm
Water-Oil Interfacial Tension
theta
degree
Contact Angle
Source and review
reviewedPetrophysics: Theory and Practice of Measuring Reservoir Rock and Fluid Transport Properties, Tiab, D., Donaldson, E. C. (2015)
Tiab, D. and Donaldson, E. C. 2015. Petrophysics: Theory and Practice of Measuring Reservoir Rock and Fluid Transport Properties. Gulf Professional Publishing, Page 363.
Source