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The initial time interval of the pressure transient during which bottom-hole pressure is dominated is dominated by infiniteboundary-acting radial flowfree reservoir flow, for example IARF (see MTR at Fig. 1)
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Fig. 1. PTA Diagnostic Plot with ETR, MTR and LTR time zones. Pressure drop is in blue and log-derivative is in red. |
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[ Well & Reservoir Surveillance ] [ Pressure Diffusion ] [ Infinite-acting radial flow (IARF) ]