Production EngineeringHydraulic Fracturing

Reynolds Number for Acid Flow into the Fracture - Acidizing Formula

N_{Re}=\frac{\rho i}{\mu h_g}

Reynolds Number for Acid Flow into the Fracture - Acidizing calculates acid flow reynolds number for hydraulic fracturing workflows in production engineering.

Calculate

How engineers use this formula

Use this formula when the listed inputs (rho, i, mu, h_g) are known and the assumptions behind the cited hydraulic fracturing 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, N_Re equals 416 dimensionless.

rholb/ft^3

62.4

ift^3/min

mulb/(ft min)

0.03

h_gft

Inputs

rho

lb/ft^3

Acid Density

i

ft^3/min

Injection Rate

mu

lb/(ft min)

Viscosity of the Reacted Acid

h_g

Formation Thickness

Outputs

N_Re

dimensionless

Acid Flow Reynolds Number

i

ft^3/min

Injection Rate

mu

lb/(ft min)

Viscosity of the Reacted Acid

h_g

Formation Thickness

Source and review

reviewed

Williams, B.B., Gidley, J.L. and Schechter, R.S. 1979. Acidizing Fundamentals. Henry L. Doherty Memorial Fund of AIME, Society of Petroleum Engineers of AIME, Page 62.

Source