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Plotting BHP
and and formation pressure vs
cumulative flow cumulatives LaTeX Math Inline |
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body | Q(t) = \int_0^t q_t(\tau) d\tau |
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It shows unit slope for PSS flow regime:
LaTeX Math Block |
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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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LaTeX Math Block |
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| p_e(t) = p_i +- \frac{1}{ V_{\phi} \, c_t} Q(t) |
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The increase/decrease in gap between parallel lines is indicating increase/decrease in in productivity index
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The increase/decrease of the parallel lines slope is indicating decrease/increase (inverse response) of the drainage volume.
Flattening out of parallel lines is indicating transition to Steady-State flow regime.
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