Evaluation of Wellbore Performance using Productivity Index
Journal Title: Invention Journal of Research Technology in Engineering & Management - Year 2019, Vol 3, Issue 1
Abstract
The performance of petroleum wells, especially, the development wells is very relevant to the petroleum engineer in other to evaluate the target reservoir. To produce efficiently from production wells, it is important to evaluate the performance of the well both on future and present preferences. In this work a partial differential equation model was developed for slightly compressible fluids and was simulated using COMSOL Multiphysics. The analysis was performed using different reservoir configurations and the results showed that increasing the length of the horizontal drain-hole leads to increase in productivity index and well productivity, provided the flow rate is kept at an optimal value. Increasing the well production rate lowers the productivity index of a well; this is due to the increased pressure drop in the reservoir. From the analysis performed regarding the applicability of the model in production wells, the higher the beta-factor of the formation, the lower the productivity of the wells, also the results showed that non-Darcy flow regime could exist in any porous media as long as the pressure gradient was sufficient for high velocity flow. A comparative analysis of the calculated productivity index of all the geometries used in the numerical computation was done and the results showed that the highest productivity index for all the geometries was obtained when the β factor was assumed to be zero. Therefore, it was concluded that the horizontal drain hole has the highest calculated productivity index for all the cases due to the increased exposure of the horizontal drain-hole to the reservoir
Authors and Affiliations
Ehirim O. Emmanuel
Keywords
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