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| constant productivity index |
In case pressure data is available for a fair interpolation it is It is highly recommended to plot sandface cumulativessandface flowrates rather than surface which provides better linearity for flowrates to achieve better linearity in correlation for stabilized reservoir flow.
Although it is equally applicable to producers and injectors, due to lack of BHP and formation pressure data availability for producers in most practical cases in the past the normalized Hall plot analysis was mostly applied for water injectors.
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