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| depending on application may mean a total sandface flowrate (
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| depending on application may mean a drain-boundary formation pressure (
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| wellbore radius | ||||||||||||
| distance to a drainarea boundary | ||||||||||||
| total skin | ||||||||||||
| a model parameter depending on Productivity Index definition and boundary type (
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Table 1. Variations of
Drain-area Productivity Index,
| Drain-boundary Productivity Index
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Steady State flow regime (SS) |
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Pseudo-Steady State flow regime (PSS) |
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