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providing that
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| for for producer | ||||
| for for injector | ||||
| for oil oil producer | ||||
| for gas gas producer or or injector | ||||
| for water water injector or water water producer or water production from oil oil producer |
See more on the variations of PI definition between Dynamic Modelling, Well Flow Performance and Well Testing.
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The Productivity Index can be constant (showing a straight line on IPR like on Fig. 1) or dependent on bottom-hole pressure on bottomhole pressure
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