The pore-saturating fluid volume is related to total rock volume
and reservoir porosity as: LaTeX Math Block |
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V_f = V_r \phi |
...
The total
...
reservoir
...
compressibility is going to be:
LaTeX Math Block |
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anchor | 1YO3U4 |
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alignment | left |
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c_t = -\frac{1}{V_r} \, \frac{\partial V_r}{\partial p} = - \frac{\phi}{V_f} \, \frac{\partial}{\partial p} \left( \frac{V_f}{\phi} \right)
= - \frac{\phi}{V_f} \, \left( V_f \, \frac{\partial}{\partial p} \frac{1}{\phi} + \frac{1}{\phi} \frac{\partial V_f}{\partial p} \right)
= - \frac{1}{\phi} \, \frac{\partial \phi}{\partial p} - \frac{1}{V_f} \, \frac{\partial V_f}{\partial p} = c_r + c_f |
where
is pore compressibility and ...
is fluid compressibility.
See also
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[Compressibility] [Total Compressibility]