PetrophysicsRock Properties

de Nouy Ring Interfacial Tension Correction Factor Formula

C=0.7250+\sqrt{\frac{0.01452S}{l^2(\rho_D-\rho_d)}+0.04534-\frac{1.679r}{R}}

de Nouy Ring Interfacial Tension Correction Factor calculates de nouy correction factor for rock properties workflows in petrophysics.

Calculate

How engineers use this formula

Use this formula when the listed inputs (S_app, l_ring, rho_lower, rho_upper, r_wire, R_ring) 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, C equals 1.109558 dimensionless.

S_appdyn/cm

l_ringcm

rho_lowerg/cm^3

rho_upperg/cm^3

0.8

r_wirecm

0.02

R_ringcm

Inputs

S_app

dyn/cm

Apparent Interfacial Tension

l_ring

Ring Perimeter

rho_lower

g/cm^3

Specific Gravity of Lower Phase

rho_upper

g/cm^3

Specific Gravity of Upper Phase

r_wire

Ring Wire Radius

R_ring

Ring Radius

Outputs

C

dimensionless

de Nouy Correction Factor

S_app

dyn/cm

Apparent Interfacial Tension

Source and review

reviewed

Petroleum and Natural Gas Laboratory Course Notes, I-Fluid Properties, Mihcakan, I. M., Alkan, K. H., Ugur, Z. (2001)

Mihcakan, I. M., Alkan, K. H., and Ugur, Z. 2001. Petroleum and Natural Gas Laboratory Course Notes, I-Fluid Properties, ITU Petroleum and Natural Gas Engineering, Page 4-4.

source conflict

Source