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A popular convention for pressure transient data analysis is PTA Diagnostic Plot.


Fall-off to increase

Fig. 1. Drawdown pressure transient as response to opening a well for production rate increase(#1) and to production rate increase  (#2)

Fig. 2. Build-up pressure transient as response to production rate decrease (#1) and to shutting down the production (#2).

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Fig. 3. Injection pressure transient as response to opening a well for injection (#1) and to injection rate increase  (#2)Fig. 4. Injection  Fall-off pressure transient transient as response to injection rate decrease

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Fig. 5. Drawdown pressure transient as response to production rate increase

Fig. 6. Build-up pressure transient as response to production rate decreaseinjection rate decrease (#1) and to shutting down the injection (#2).



See Also

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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Well Testing / Pressure Testing

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