Disclaimer: Not to be confused with Compressibility factor .
A measure of resistance of a Continuum body to compression.
A measure of isothermal relative change in density or molar volume under a unit pressure variation:
c = \frac{1}{\rho} \left( \frac{\partial \rho}{\partial p} \right)_T = - \frac{1}{V_m} \left( \frac{\partial V_m}{\partial p} \right)_T |
Symbol | Dimension | SI units | Oil metric units | Oil field units |
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M-1 L1 T2 | Pa-1 | kPa-1 | psi-1 |
Compressibility depends on the thermodynamic conditions at which it is measured and as such is not a material property.
Compressibility is related to Z-factor and Formation Volume Factor (FVF) as:
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The most popular material compressibilities are:
Isothermal Compressibility | Isentropic Compressibility | ||
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Physics / Mechanics / Continuum mechanics / / Continuum body
[Fluid compressibility] [Pore compressibility] [Total compressibility]