Dimensionless rate (radial flow/constant pressure production)

Input(s)

$p_{i}$: Initial Reservoir Pressure (psi)

q: Flow Rate (STB/day)

B: Formation Volume Factor (RB/STB)

$\mu$: Oil Viscosity (cP)

$\mathrm{k}$: Permeability $(\mathrm{mD})$

h: Reservoir Thickness (ft)

$p_{w f}$: Well Flowing Pressure (psi)

Output(s)

$q_{d}$: Dimensionless Rate (dimensionless)

Formula(s)

$$ q_{d}=\frac{q * B * \mu}{0.00708 * k * h *\left(p_{i}-p_{w f}\right)} $$

Reference(s)

Lee, J., Rollins, J. B., \& Spivey, J. P. (2003). Pressure Transient Testing (Vol. 9). Richardson, Texas: Society of Petroleum Engineers, Page: 9.