Dimensionless wellbore storage coefficient of radial flow - Constant-rate production
Input(s)
\(\mathrm{h}\): Reservoir Thickness (ft)
C: Wellbore Storage Coefficient (STB/psi) \(\varnothing\): Porosity (fraction)
\(\mathrm{c}_{\mathrm{t}}\): Total Compressibility \((1 / \mathrm{psi})\)
\(\mathrm{r}_{\mathrm{w}}\): Wellbore Radius (ft)
Output(s)
\(\mathrm{C}_{\mathrm{d}}\): Dimensionless Wellbore-Storage Coefficient (dimensionless)
Formula(s)
\[
\mathrm{C}_{\mathrm{d}}=\frac{0.8936 * \mathrm{C}}{\emptyset * \mathrm{c}_{\mathrm{t}} * \mathrm{~h} * \mathrm{r}_{\mathrm{w}}^{2}}
\]
Reference(s)
Lee, J., Rollins, J. B., & Spivey, J. P. (2003). Pressure Transient Testing (Vol. 9). Richardson, Texas: Society of Petroleum Engineer, Page: 8.