Determining Productivity Index and Inflow Performance Relationship from Swab Test Results Data

Abstract

Productivity index (PI) and inflow performance relationship have (IPR) been established tools used by petroleum engineers to measure oil well performance. These values are very important especially in designing artificial lift system or well stimulation that will be conducted on a well that is being completed or worked-over. Unfortunately, both PI and IPR can only be accurately determined after the well has been put on production and has reached pseudosteady state flow conditions. In this work, a simple-to-use method has been developed with which one may estimate the PI and IPR using the results of swabbing operation conducted within the completion or work-over activity. Several field cases of swab tests validated this method. The results demonstrate that the proposed method sufficiently estimates the true PI and IPR and hence can help petroleum engineers in making a fast decision during critical and dynamic situations like well completion or work-over jobs.