This paper presents a study on effects of perforation flow geometry on the evaluation of the flow performance of perforations. From data obtained in the laboratory serious deficiency and poor accuracy were identified in exploring the linear perforation targets recommended by API RP 43 Section II for the evaluation of the flow performance of perforations. This discredits the validity of the procedure and poses doubt to the correctness of applying API RP 43 results to the downhole conditions. The work suggested that perforations with radial flow configuration should be utilised in such an evaluation.

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