Total compressibility
Input(s)
\(c_{g}\): Compressibility of gas (1/psi)
\(c_{o}\): Compressibility of oil (1/psi)
\(c_{w}\): Compressibility of water (1/psi)
\(c_{f}\): Compressibility of formation (1/psi)
\(S_{g}\): Saturation of gas (fraction)
\(S_{o}\): Saturation of oil (fraction)
\(S_{w}\): Saturation of water (fraction)
Output(s)
\(c_{t}\): Total Compressibility (1/psi)
Formula(s)
\[
c_{t}=c_{g} * S_{g}+c_{o} * S_{o}+c_{w} * S_{w}+c_{f}
\]
Reference(s)
Petrowiki.org.