A measure of rock volume change due to pressure variation:
c_r = \frac{1}{V} \frac{\partial V}{\partial p} |
It stays constant for small pressure variations () but for a wide range pressure variations the dependence on ambient pressure can not be neglected
The typical values are in but may go higher for poorly consolidated rocks.
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Rock Geomechanics
[ Basic reservoir properties ]
[ Pore Compressibility ( cϕ ) ]