Slope of Semilog plot for bottom-hole flowing pressure vs time for drawdown test
Input(s)
\(Q_{o}\): Oil Flow Rate (STB/day)
\(\mu_{o}\): Oil Viscosity \((\mathrm{cP})\)
\(B_{o}\): Oil Formation Volume Factor (bbl/STB)
\(\mathrm{k}\): Permeability \((\mathrm{mD})\)
\(\mathrm{h}\): Thickness \((\mathrm{ft})\)
Output(s)
\(\mathrm{m}\): Slope (psi/cycle)
Formula(s)
\[
m=\frac{162.6 * Q_{o} * \mu_{o} * B_{o}}{k * h}
\]
Reference(s)
Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 1, Page: 45 .