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Corrrelation | Name/Author | Scope |
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(1) |
\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) } |
(2) |
p_n = p_{\rm min} + 1.75 \cdot \phi^{0.51} \cdot (p_{\rm max} - p) |
(3) |
p_{ni} = p_{\rm min} + 1.75 \cdot \phi^{0.51} \cdot (p_{\rm max} - p_i) |
where
p_i is initial formation pressure
c_{ri} is initial formation compressibility | Dobrynin | Pmin = 1 MPa < p < Pmax = 200 MPa
(4) |
p_{\rm min} = 1 Mpa \, {\rm psi} \, < \, p \, < \, p_{\rm max} = 200 Mpa \, {\rm psi} |
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