Time to pseudo-steady state (single well-circular reservoir)
Input(s)
Ø: Porosity (fraction)
\(\mu\): Viscosity (cP)
\(c_{t}\): Compressibility (/psi)
\(r_{e}\): Radius of reservoir \((\mathrm{ft})\)
\(\mathrm{k}\): Permeability \((\mathrm{mD})\)
Output(s)
\(\mathrm{t}_{\mathrm{pss}}\): Pseudo steady state \((\mathrm{h})\)
Formula(s)
\[
\text { tpss }=1200 * \varnothing * \mu * c_{t} * \frac{r_{e}^{2}}{k}
\]
Reference(s)
Pressure Buildup and Flow Tests in Wells, Matthews & Russell, Page: 13.