Small deviations variations of ambient pressure
from initial pressure formation formation pressure lead to
the exponential changes in
porositypermeability:
LaTeX Math Block |
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k=k_0 \, e^{n_k \cdot c_r (p-p_0)} |
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| formation compressibility |
LaTeX Math Inline |
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body | n_k = \frac{\ln (k/k_0)}{\ln(\phi/\phi_0)} |
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| power degree of permeability-porosity correlation |
| formation permeability at reference pressure
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| formation porosity at reference pressure |
| reference pressure, usually picked up at initial reservoir formation pressure |
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