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| production/injection time | |||||||||||||
| total sandface flowrate as function of time
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| drain-area formation pressure as function of time
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| \tau |
| bottomhole pressure as function of time
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| constant productivity index |
Due to integration procedure the Hall Plot has a better tolerance to uncertainties in formation pressure and bottomhole pressure comparing to Unweighted J-plot.
It is highly recommended to plot sandface flowrates rather than surface flowrates to achieve better linearity in correlation for stabilized reservoir flow.
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