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A popular convention for pressure transient data analysis is PTA Diagnostic Plot.
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Fig. 1. – Drawdown pressure transient as response to opening a well for production (#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 (#6). |
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| Fig. 3. Injection – Injection pressure transient as response to opening a well for injection (#1) and to injection rate increase (#2) | Fig. 4. Fall – Fall-off pressure transient as response to injection rate decrease (#1) and to shutting down the injection (#2). |
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