ANALYSIS OF RESULT PRESSURE BUILD UP TEST BEFORE AND AFTER ACIDIZING IN GAS WELL YA- 01 Arinda Ristawati (a)*, Mulia Ginting (a), Jasmine Ghina Kaynes (a), Onnie Ridaliani Prapansya (a), R. Hari Karyadi Oetomo (a) , Puri Wijayanti(a)
Fakultas Teknologi Kebumian dan Energi, Prodi Teknik Perminyakan,
Universitas Trisakti, Jakarta
Abstract
The YA- 01 production well is a well that has decreased production. The decrease in the amount of production can be caused by continuous production activities or it can also be caused by formation damage. One way to overcome formation damage is by acidizing. The success of acidizing can be shown based on the analysis of the Pressure Build Up Test. Based on the analysis of the Pressure Build Up test, it can be obtained reservoir characteristics such as skin factor (s), permeability (k), permeability thickness (kh), initial reservoir pressure, reservoir model, well model, boundary model, and wellbore storage model. From the results of these parameters can be used to determine the success of acidizing. Pressure Build Up testing is done by using the Horner method with Pseudo-Pressure Approach and assisted by software. This test was carried out based on activities before and after acidizing. Based on the analysis before acidizing, it is known that the YA- 01 gas well has a skin value of 10.4, which means that there is formation damage around the wellbore. Therefore, the YA- 01 gas well is acidized with the aim of reducing the skin value. After acidizing, the skin factor value decreased to -1.38, which means the well has been repaired. Based on the results of this analysis, it can be said that the acidizing in well YA- 01 was successfully carried out.
