Pseudosteady-State Dimensionless Pressure Drop for Fractured Vertical Well Formula
Pseudosteady-State Dimensionless Pressure Drop for Fractured Vertical Well calculates wellbore dimensionless pressure drop for pressure transient analysis workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (t_DA, C_f, x_e, x_f) are known and the assumptions behind the cited pressure transient analysis 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, P_D equals 1.921224 dimensionless.
0.1
30
1000
300
Inputs
t_DA
dimensionlessDimensionless Time Based on Drainage Area
C_f
dimensionlessFractured Vertical Well Shape Factor
x_e
ftHalf Side Length of Square Drainage Area
x_f
ftFracture Half-Length
Outputs
P_D
Wellbore Dimensionless Pressure Drop
t_DA
Dimensionless Time Based on Drainage Area
C_f
Fractured Vertical Well Shape Factor
Source and review
reviewedJoshi, S. D. Horizontal Well Technology, PennWell Publishing Company, Chapter 7, Page 211.
Source