COMPARATIVE STUDY OF CO 2 INJECTION AT CRITICAL SWELLING FACTOR AND MISCIBLE CONDITION IN “B” STRUCTURE AT “S” FIELD BACHELOR THESIS Muhammad Aditya Firman Wahyudi 12216043 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 2020 COMPARATIVE STUDY OF CO 2 INJECTION AT CRITICAL SWELLING FACTOR AND MISCIBLE CONDITION IN “B” STRUCTURE AT “S” FIELD BACHELOR THESIS Muhammad Aditya Firman Wahyudi 12216043 Submitted as partial fulfillment of the requirements for the degree of BACHELOR OF ENGINEERING in Petroleum Engineering study program Approved by: Thesis Adviser, ………………………… Prof. Ir. Asep Kurnia Permadi, M.Sc., Ph.D. NIP. 196311121990011001 Bandung, 24 September 2020 COMPARATIVE STUDY OF CO 2 INJECTION AT CRITICAL SWELLING FACTOR AND MISCIBLE CONDITION IN “B” STRUCTURE AT “S” FIELD Muhammad Aditya Firman Wahyudi* and Asep Kurnia Permadi ** Copyright 2020, Institut Teknologi Bandung Abstract Carbon dioxide (CO 2) injection is a well-known enhanced oil recovery (EOR) method successfully applied in numerous countries by injecting CO 2 either in miscible or immiscible conditions and showing significant results. During the CO 2 EOR process, CO2 will be dissolved into oil and lead to an increase in oil mobility. For some high temperature-reservoir, miscibility is achieved with high minimum miscibility pressure (MMP). It will lead to a severe problem in Indonesia since most of the MMP value exceeds reservoir fracture pressure. Thus, a new approach might be needed to overcome this problem. Experimental result demonstrates CO 2 injection pressure under critical swelling factor, and the miscible condition does not show any significant value in viscosity increment. This indicates the CO 2 solubility was nearly reached under the given condition. A new approach of CO 2 injection pressure at critical swelling factor will be developed in this study. This study aims to compare the effect of continuous CO 2 injection at critical swelling factor and miscible conditions into sandstone reservoirs in "B" Structure at "S" Field, Indonesia. Reservoir simulation and production forecasts were performed by using CMG GEM TM for ten years of production based on the fluid compositional model in CMG WINPROP TM . Viscosity behavior under simulation condition was observed and compared to experimental data.