Slope of pseudo-steady state flow in pressure buildup test
Input(s)
Q: Flow Rate (STB/day)
B: Formation Volume Factor (bbl/STB)
\(c_{t}\): Total Compressibility \((1 / \mathrm{psi})\)
A: Drainage Area \(\left(\mathrm{ft}^{2}\right)\)
\(\emptyset\): Porosity (fraction)
\(\mathrm{h}\): Thickness (ft)
Output(s)
\(m_{p s s}\): Slope \((\mathrm{psi} / \mathrm{h})\)
Formula(s)
\[
m_{p s s}=\frac{0.23396 * Q * B}{c_{t} * A * h * \phi}
\]
Reference(s)
Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 1, Page: 33 .