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q(t)=q_{i}0 \cdot \left( 1+b \cdot D \cdot t \right)^{-1/b} |
where
| Initial production rate of a well (or groups of wells) |
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body | D=-\frac{1}{q}\frac{dq}{dt} |
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| decline decrement (the higher the the stronger is decline) |
| defines the type of decline (see below) |
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Exponential | Hyperbolic | Harmonic |
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| q(t)=q_{i}0 \exp \left( -D \, t \right) |
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| q(t)=q_{i}0 \cdot \left( 1+b \cdot D \cdot t \right)^{-1/b} |
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| q(t)=\frac{q_{i0}}{1+D \, t} |
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| Q(t)=\frac{q_{i}0-q(t)}{D} |
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| Q(t)=\frac{q_{i}0}{D \, (1-b)} \, \left[ q_{i}^{1-b}-1-{\frac{q(t)}{q_0}}^{1-b} \right]
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| Q(t)=\frac{q_{i0}}{D} \, \ln \left[ \frac{q_{i}0}{q(t)} \right] |
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| Q_max=\frac{q_0}{D} |
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| Q_max=\frac{q_0}{D \, (1-b)} |
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| Q_max=\infty |
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Arps decline only work for Boundary Dominated Flow.
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