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@wikipedia


A measure of
formation porosity 

LaTeX Math Inline
body\phi
 change due to pressure 
LaTeX Math Inline
bodyp
 variation:

LaTeX Math Block
anchorcr
alignmentleft
c_r = \frac{1}{\phi} \frac{\partial \phi}{\partial p}

...

but may go higher for poorly consolidated rocks.


See Also

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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petrophysics / Geomechanical Rock Modelling

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