Specific type of production rate q(t) decline:
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where
q_0 = q(t=0) | Initial production rate of a well (or groups of wells) |
D_0 > 0 | model parameter which in this specific case coincides with a constant Production decline rate D(t) = D_0 = \rm const |
\displaystyle Q(t)=\int_0^t q(t) \, dt | cumulative production by the time moment t |
Q_{\rm max} =\int_0^{\infty} q(t) \, dt | Estimated Ultimate Recovery (EUR) |
\displaystyle D(t) = - \frac{dq}{dQ} | Production decline rate |
It can be applied to any fluid production: water, oil or gas.
Exponential Production Decline has a physical meaning of producing from a finite-volume reservoir with finite reserves Q_{\rm max} under Pseudo Steady State (PSS) conditions, resulting in constant Production decline rate D(t) = D_0 = \rm const.
See Also
Petroleum Industry / Upstream / Production / Subsurface Production / Field Study & Modelling / Production Analysis / Decline Curve Analysis