SENSITIVITY ANALYSIS OF WORMHOLE PROPAGATION MODEL IN CARBONATE ACIDIZING USING VOLUMETRIC MODEL AND BUIJSE- GLASBERGEN MODEL BACHELOR THESIS RIFKI HELMANSYAH 12219010 Submitted as partial fulfillment of the requirements for the degree of BACHELOR OF ENGINEERING in Petroleum Engineering study program PETROLEUM ENGINEERING STUDY PROGRAM FACULTY OF MINING AND PETROLEUM ENGINEERING INSTITUT TEKNOLOGI BANDUNG 2023 SENSITIVITY ANALYSIS OF WORMHOLE PROPAGATION MODEL IN CARBONATE ACIDIZING USING VOLUMETRIC MODEL AND BUIJSE- GLASBERGEN MODEL BACHELOR THESIS RIFKI HELMANSYAH 12219010 Submitted as partial fulfillment of the requirements for the degree of BACHELOR OF ENGINEERING in Petroleum Engineering study program Approved by: Thesis Adviser, Ardhi Hakim Lumban Gaol, S.T., M.Sc., Ph.D. NIP. 198706302012121001 1 SENSITIVITY ANALYSIS OF WORMHOLE PROPAGATION MODEL IN CARBONATE ACIDIZING USING VOLUMETRIC MODEL AND BUIJSE- GLASBERGEN MODEL Rifki Helmansyah* and Ardhi Hakim Lumban Gaol** Copyright 2023, Institut Teknologi Bandung Abstract Acidizing is one of the methods in the oil and gas industry to increase well production. In this study, we conduct sensitivity analysis of wormhole propagation models in carbonate fields using two different propagation models, namely the Volumetric Model and the Buijse-Glasbergen Model. This study focuses on the effect of acid concentration and temperature on the two wormhole propagation models used. In this study, several variations of acid concentration and temperature were tested to understand how changes in these parameters can affect several important factors in acidizing, including wormhole penetration length, skin factor, and flowrate. The results of the sensitivity analysis show that acid concentration and temperature significantly affect the wormhole propagation characteristics in acidizing, both in the Volumetric Model and the Buijse-Glasbergen Model. Changes in acid concentration and temperature are shown to have an impact on the wormhole penetration length, where an increase in acid concentration and temperature tends to increase the size of the wormhole formed. Sensitivity analysis also revealed that, changes in acid concentration and temperature can affect the skin factor value, increasing acid concentration and temperature can reduce the skin factor value, which illustrates the improvement of fluid flow quality around the wormhole and well. In addition, the sensitivity analysis results show that the acid concentration and temperature also have an impact on the flowrate during the acidizing process. The variation of these parameters can affect the efficiency of acid injection into the carbonate formation and the overall result of the acidizing process. Keywords: Acidizing, Volumetric Model, Buijse-Glasbergen Model, Wormhole Penetration Lengthe, Skin Factor, Flowrate. Sari Acidizing merupakan salah satu metode dalam industri minyak dan gas untuk meningkatkan produksi sumur. Dalam penelitian ini, kami melakukan sensitivity analisis terhadap wormhole propagation models di lapangan karbonat menggunakan dua model propagasi yang berbeda, yaitu Model Volumetrik dan Model Buijse- Glasbergen. Penelitian ini berfokus pada pengaruh konsentrasi asam dan temperatur pada dua mwormhole propagation models yang digunakan.