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| cumulative offtakes from
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| effective formation thickness averaged over drainage area |
| full-field cumulative offtakes by the time moment
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| effective porosity as function of formation pressure |
| full-field cumulative intakes by the time moment
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| total compressibility as function of formation pressure
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| cumulative volumetric inflow from Gas Cap Expansion | ||||||||||||||||
| full-field cumulative reservoir fluid balance |
| cumulative volumetric inflow from Aquifer Expansion |
and The MatBal equation which is often completed by constant PI model of Bottom-Hole Pressure (
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