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LaTeX Math Block
anchorFetkovich_PSSCT
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\frac{d Q^{\downarrow}_{AQ}}{dt} = \frac{ B \cdot (p_i - p(t)) - Q_{AQ} \cdot p'_D(t)}{p_D(t) - t \cdot pip'_D(t)}



LaTeX Math Block
anchor1
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q^{\downarrow}_{AQ}(t)=\frac{d Q^{\downarrow}_{AQ}}{dt} 



Assumption #1 = Const Productivity Index Aquifer:

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titleDerivation
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LaTeX Math Block
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q_{AQ} = \frac{d Q_{AQ}}{dt} = J_{AQ} \cdot ( p_{AQ}(t) - p(t))

Assumption #2 = Pseudo Steady State Flow:

LaTeX Math Block
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p_{AQ}(t) = p_i - \frac{Q_{AQ}}{V_{AQ} c_t}
Eliminating
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bodyp_{AQ}(t)
one arrives to
LaTeX Math Block Reference
anchorFetkovich_PSS
.

Equation

LaTeX Math Block Reference
anchorCT
is not a solution of diffusion equation but an approximation of VEH model



See Also

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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Field Study & Modelling / Aquifer Drive / Aquifer Drive @model

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