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Pseudo Steady State (PSS)

Created by Arthur Aslanyan (Nafta College), last modified on Sep 29, 2018

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Well flow regime with constant rate and constant delta pressure between wellbore and formation does not change in time:

$\begin{array}{l}\displaystyle q(t) = q = \rm const\end{array}$

$\begin{array}{l}\displaystyle \Delta p(t) = | p_e(t) - p_{wf}(t) | = \Delta p = \rm const\end{array}$

The exact solution of diffusion equation for

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