Water influx constant for the van Everdingen and Hurst unsteady-state model
Input(s)
\(c_{t}\): Total Aquifer Compressibility (1/psi)
\(\emptyset\): Porosity of the Aquifer (fraction)
\(\mathrm{r}_{\mathrm{e}}\): Radius of Reservoir \((\mathrm{ft})\)
\(\mathrm{h}\): Thickness of the Aquifer (ft)
f: Encroachment Angle (Divided by 360)
Output(s)
B: Water Influx (bbl)
Formula(s)
\[
\mathrm{B}=1.119 * \emptyset * \mathrm{c}_{\mathrm{t}} *\left(\mathrm{r}_{\mathrm{e}}^{2}\right) * \mathrm{~h} * \mathrm{f}
\]
Reference(s)
Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 4, Page: 310 .