Contact angle

Input(s)

$\sigma_{s o}$: Interfacial Tension between the solid and oil $(\mathrm{dyn} / \mathrm{cm})$

$\sigma_{s w}$: Interfacial Tension between the solid and water $(\mathrm{dyn} / \mathrm{cm})$

$\sigma_{w o}$: Interfacial Tension between the water and oil $(\mathrm{dyn} / \mathrm{cm})$

Output(s)

$\theta$: Contact Angle (degree)

Formula(s)

$$ \cos \theta=\frac{\sigma_{\mathrm{so}}-\sigma_{\mathrm{sw}}}{\sigma_{\mathrm{wo}}} $$

Reference(s)

Tiab, D., \& Donaldson, E. C. (2015). Petrophysics: Theory and Practice of Measuring Reservoir Rock and Fluid Transport Properties. Gulf Professional Publishing. Page: 362.