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The table below is summarizing the major differences between SS and PSS regimes.
| Steady state regime (SS) | Pseudo-steady state (PSS) | ||||||
|---|---|---|---|---|---|---|---|
| Boundary | Full pressure support | No pressure support | |||||
| Productivity index |
| constant | constant | ||||
| Flow rate |
| constant | constant | ||||
Drawdown |
| constant | constant | ||||
| Botom-hole pressure |
| constant | varying | ||||
| Formation pressure |
| constant | varying |
It's again important to avoid confusion between the termine stationary conditions (which mean that refered properties are not chaning in time) and stabilised flow conditions which may admit pressure and rate vraition.
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The conventional WFP – Well Performance Analysis is perfomed as the cross-lot with two physical models:
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and
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- Performance also called Outflow Performance Relation or Tubing Performance Relation
| Anchor | ||||
|---|---|---|---|---|
|
IPR – Inflow Performance Relationship
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