Total pore volume compressibility

Input(s)

$\mathrm{P}_{\mathrm{i}}$: Initial Pressure (psi)

P: Pressure (psi)

$(\mathrm{PV})_{\mathrm{i}}$: Pore Volume at Initial Reservoir Pressure (bbl)

$(\mathrm{PV})_{\mathrm{p}}$: Pore Volume at Pressure P $(\mathrm{bbl})$

Output(s)

$\mathrm{c}_{\mathrm{f}}$: Cumulative Pore Volume (Formation or Rock) Compressibility (1/psi)

Formula(s)

$$ \mathrm{c}_{\mathrm{f}}=\left(\frac{1}{(\mathrm{PV})_{\mathrm{i}}}\right) *\left(\frac{(\mathrm{PV})_{\mathrm{i}}-(\mathrm{PV})_{\mathrm{p}}}{\mathrm{P}_{\mathrm{i}}-\mathrm{P}}\right) $$

Reference(s)

Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 3, Page: 213 .