Journal of Emerging Trends in Engineering and Applied Sciences: Research Areas

Article Title: Well Test Analysis in the Determination of Wellbore Formation Problems (Skin Factor)
by Ogidi Triumphant Ese, Ogugu Augustine Abiodun

Abstract:
Well testing is a method of determining reservoir parameters that involves altering the output flow rate of an oil or gas well. Data from well tests are used to estimate reservoir reserve which were utilized to determine whether reservoirs are economically viable. The wellbore of a well can be damaged during well drilling and completion process. Oil or gas output may suffer as a result of this damage. The data collected after well testing is examined to determine factors such as permeability, skin, and starting reservoir pressure. These are critical information for determining whether or not the well has been damaged. The goal is to conduct well test analysis on buildup test data in order to identify wellbore formation issues. This was accomplished by analyzing two buildup test data sets for well A3 and well J in the Gwuana and Akota fields, respectively, using Saphir software. According to the results, wells A3 and J are damaged, with a positive skin value of 10and 107mD respectively Both wells have initial reservoir pressures of 3591.38psia and 5384.54psia, respectively. Well A3 has a permeability of 21.3 md, but well J has a permeability of 107 md. To see how well skin affected productivity, an IPR plot of pwfvs q was plotted or well A3. According to the analysis, wells A3 and J shows damage value and hydraulic fracturing or acidizing is recommended.

Keywords: Well, Reservoir, Test, Pressure, Skin

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