#TITLE_ALTERNATIVE#

• Main Author: SYIFA WIDAYANTI (NIM : 12212093), RACHMI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/30080
• Institution: Institut Teknologi Bandung

P/Z method can be used to estimate volume of Initial Gas In Place (IGIP) accurately. This method requires production history data and reservoir pressure data. However, P/Z method using production history and reservoir pressure data is only valid for dry gas reservoir. In condensate gas reservoir, the use of this method will result in an overpredict estimation of IGIP compared to IGIP from simulation result. This is due to condensate banking along the wellbore that will affect reservoir profile which cause deviation in P/Z vs Gp plot. This deviation will give a significant error, specifically around 24% for this particular case. <br /> <br /> Therefore, that deviation effect can not be negligible and needs to be corrected by choosing the right method in determining reservoir pressure. However, usually in normal cases, reservoir pressure is not measured periodically. So, reservoir pressure needs to be calculated using the correct correlation. The first step is to alter well head pressure to bottom hole pressure using correct correlation for condensate gas well. The correct correlation for this case is Gray correlation. After that, the bottom hole pressure is transformed to reservoir pressure using Fetkovich IPR correlation with trial and error method in determining the Fetkovich IPR parameters. With this method, the proper reservoir pressure is obtained. P/Z from this method results in a relatively low error compared to simulation result which is only less than 3%. In the end, P/Z data is plotted vs cumulative production and obtained IGIP result a low error compared to IGIP from simulation result, which is only around 4%.Hopefuly, this study could be a reference for oil and gas industry in estimating IGIP of condensate gas reservoir.