Reservoir EngineeringWell Performance
Effective Wellbore Radius of a Well in Presence of Uniform Flux Fractures Formula
Effective Wellbore Radius of a Well in Presence of Uniform Flux Fractures calculates effective wellbore radius for well performance workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (X_f, e) are known and the assumptions behind the cited well performance 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, r_w equals 36.791759 ft.
X_fft
100
edimensionless
2.718
Inputs
X_f
ftFracture Half Length
e
dimensionlessLogarithmic Constant
Outputs
r_w
ft
Effective Wellbore Radius
X_f
ft
Fracture Half Length (rearranged)
Source and review
reviewedJoshi, S. D. (1991). Horizontal Well Technology. Tulsa, Oklahoma: PennWell Publishing Company. Chapter 5, Page 135.
Source