Motivation
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Excerpt Include |
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| Aquifer Drive |
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| Aquifer Drive |
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nopanel | true |
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Inputs & Outputs
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Physical Model
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Mathematical Model
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LaTeX Math Block |
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anchor | Fetkovich_PSS |
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alignment | left |
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| \tau \cdot \frac{d Q^{\downarrow}_{AQ}}{dt} + Q^{\downarrow}_{AQ} = с_t \, V_\phi \cdot \left[ p_i - p(t) \right] |
| LaTeX Math Block |
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| q^{\downarrow}_{AQ}(t)=\frac{d Q^{\downarrow}_{AQ}}{dt} |
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which can be explicitly integrated:
LaTeX Math Block |
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anchor | Fetkovich_PSS |
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alignment | left |
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| Q^{\downarrow}_{AQ}(t) = J_{AQ} \, \exp \left( -\frac{t}{\tau} \right) \, \int_0^t \big[ p_i - p(\xi) \big] \, \exp \left( \frac{\xi}{\tau} \right) \, d \xi |
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Expand |
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Panel |
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| Assumption #1 = Const Productivity Index Aquifer: 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}}{c_t \, V_\phi} |
Eliminating one arrives to LaTeX Math Block Reference |
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See Also
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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Field Study & Modelling / Aquifer ExpansionDrive / Aquifer expansion @modelDrive Models
Reference
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1. Fetkovich, M.J. 1971. A Simplified Approach to Water Influx Calculations—Finite Aquifer Systems. J Pet Technol 23 (7): 814–28. SPE-2603-PA. http://dx.doi.org/10.2118/2603-PA