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Tje XCRM model predicts the formation pressure

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and bottom-hole pressure
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in
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-th oil producer in response to its current production rate
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its cumulative production rate (
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,
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), cumulative production of the offset wells (
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,
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)

Given 

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p_{e,n} \ (t) = p_{i,n} \ (0) + \gamma_n^{-1} \cdot  \sum_m \left(  Q^{\uparrow}_{nm} +  Q^{\downarrow}_{nm} \ \right)
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p_{{\rm wf}, n} \ \ \ (t) = p_e \ (t) + 0.5 \cdot J_{On}^{-1} \cdot \left[  q^{\uparrow}_{On}(t)   + f^{\uparrow}_{W,nn} \cdot \frac{\mu_W}{\mu_O} \cdot \frac{k_{ro}(s_{wn})}{k_{rw}(s_{wn})} \cdot q^{\uparrow}_{Wn}(t)   \right]
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s_{wn} = \left[ 1 + \frac{B_o}{B_w} \cdot \frac{q^{\uparrow}_{On}}{f^{\uparrow}_{W,nn} \cdot q^{\uparrow}_{Wn}}  \right]^{-1}

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