#TITLE_ALTERNATIVE#

• Main Author: AGUSTIN KARUNIA (NIM : 12213049), JHON
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/22695
• Institution: Institut Teknologi Bandung

Reservoirs in the world contain various types of oil. The type of oil is distinguished by its viscosity value as well as its API grade value. One type of oil contained in the reservoir is heavy oil. Some heavy oil reservoirs can not be exploited conventionally so it needs EOR (Enhanced Oil Recovery) method. Steamflood is one of many types of EOR (Enhanced Oil Recovery) methods used to exploit heavy oil fields. <br /> <br /> <br /> This study describes the optimization and analysis of steamflood economics on well spacing variation. The steamflood is performed using a vertical injection well with an inverted 7-spots injection pattern. The steamflood is simulated using a CMG STARS petroleum simulator. The reservoir model is initially constructed based on data from the X heavy oil field located in Central Sumatra and then modified based on the characteristics of heavy oil reservoir according to Hama et al. (2014). The efficiency of the steamflood method is checked by sensitivity to the parameters that have positive effect on the recovery factor value based on the equation of recovery factor determination by Wiratma (2015). The range of values from the parameters selected for the sensitivity test is also based on the screening criteria by Hama et al. (2014). After conducting sensitivity, the optimum value of each parameter that produces the best recovery factor will be generated. Furthermore, several development scenarios are created from the optimization result and its economic analysis will be evaluated. <br /> <br /> <br /> The optimum conditions choosen from the sensitivity is by injecting steam with 0.85 steam quality and rate 750 bbl/day in a reservoir which has permeability 1812 and 2500 mD along with 300 cP oil viscosity. From these conditions, four optimization scenarios are formed then.. According to its economic evaluation, the best injection scenario is scenario-D within PSC scheme and applied in 20 acre reservoir. It generates contractor NPV of 0.166 MMUSD and 4.985 MMUSD for government NPV.