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It shows unit slope for PSS flow regime:
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| p_{wf}(t) = p_i + J^{-1} q_t + \frac{1}{ V_{\phi} \, c_t} Q(t) |
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| p_e(t) = p_i + \frac{1}{ V_{\phi} \, c_t} Q(t) |
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while
and
are being parallel to each other.
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J = \frac{q_t}{\Delta p} = \rm const |
The increase/decrease in gap between parallel lines is indicating increase/decrease in productivity index
.
See Also
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Petroleum Industry / Upstream / Production / Subsurface Production / Field Study & Modelling / Production Analysis
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