Dimensionless radius of radial flow - Constant-rate production
Input(s)
r: Effective Radius/Reservoir Radius (ft)
\(\mathrm{r}_{\mathrm{w}}\): Wellbore Radius ( \(\mathrm{ft}\) )
Output(s)
\(\mathrm{r}_{\mathrm{d}}\): Dimensionless Radius (dimensionless)
Formula(s)
\[
\mathrm{r}_{\mathrm{d}}=\frac{\mathrm{r}}{\mathrm{r}_{\mathrm{w}}}
\]
Reference(s)
Lee, J., Rollins, J. B., & Spivey, J. P. (2003). Pressure Transient Testing (Vol. 9). Richardson, Texas: Society of Petroleum Engineers, Page: 8.