Correlation between absolute permeability
at a given reservoir pressure and initial absolute permeability at initial formation pressure
Correlation | Name/Author | Scope |
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LaTeX Math Block |
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| k_a(p) = k_{ai} \cdot \exp [ - c_k \cdot (p_i - p) ] |
| Yilmaz and Nur
| Wide pressure range below
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Corrrelation | Name/Author | Scope |
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LaTeX Math Block |
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k(p) = k_i \cdot \exp [ - \gamma \cdot (p_i - p) ] |
Yilmaz and Nur | LaTeX Math Block |
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anchor | Dobrynin |
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alignment | left |
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\displaystyle c_r(p) = c_{ri} \cdot \frac{ \ln \left( \frac{ p_n }{p_{\rm max}} \right) }{ \ln \left( \frac{p_{ni}}{p_{\rm max}} \right) } |
LaTeX Math Block |
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p_n = p_{\rm min} + 1.75 \cdot \phi^{0.51} \cdot (p_{\rm max} - p) |
LaTeX Math Block |
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p_{ni} = p_{\rm min} + 1.75 \cdot \phi^{0.51} \cdot (p_{\rm max} - p_i) |
where
is initial formation pressure is initial formation compressibilityDobrynin | Sandstone pmin = 1 MPa < p < pmax = 200 MPa |
See also
...
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petrophysics / Absolute permeability
[Geomechanical Rock Modelling]