Dimensionless pressure (radial-flow/constant rate production)
Input(s)
\(p_{i}\): Initial Reservoir Pressure (psi)
\(\mathrm{p}\): Reservoir Thickness (psi)
\(\mathrm{k}\): Permeability \((\mathrm{mD})\)
h: Reservoir Thickness (ft)
q: Formation Volume Factor (STB/day)
B: Volume Factor (RB/STB)
\(\mu\): Oil Viscosity \((\mathrm{cP})\)
Output(s)
\(P_{d}\): Dimensionless Pressure (dimensionless)
Formula(s)
\[
P_{d}=\frac{k * h}{141.2 * q * B * \mu} *\left(p_{i}-p\right)
\]
Reference(s)
Lee, J., Rollins, J. B., & Spivey, J. P. (2003). Pressure Transient Testing (Vol. 9). Richardson, Texas: Society of Petroleum Engineers, Page: 8.