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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)
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) ]