#TITLE_ALTERNATIVE#

• Main Author: PRADIPTA (NIM : 12213017), RIFANDIA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/23977
• Institution: Institut Teknologi Bandung

Gas lift is one of the most common artificial lift methods to help the production process of oil wells after natural flow stage. In this method, high pressure gas is injected into the well oil column to reduce the reservoir fluid average density and make the fluid flow to the surface easier. An inefficient gas allocation in a field reduces well production efficiency and revenue for the company, since excessive gas injection is expensive due to the high gas prices and compressing cost. Therefore, it is necessary to allocate the injection gas into each well in optimum amount to obtain the field maximum production rate. <br /> <br /> <br /> Typical problems in gas lift optimization are the surface facilities design consideration and the interaction between wells in the gathering network. The back-pressure in the flowline adversely affects oil production from all the other connected wells. The length of the pipeline that connect wells to separator in surface also influences the gas lift well performance. Thus, the optimum gas injection rate obtained from single well consideration cannot be applied directly for field. <br /> <br /> <br /> This study compares the result obtained from conventional single well analysis with the result obtained from field analysis, to acquire the evidence of a change in gas lift performance curve (GLPC), optimum gas injection rate, and maximum oil production rate. The analysis was done using two simulator, PROSPER and GAP. It is found that field analysis have a significant difference from the single well analysis, which is up to 46.47% lower in optimum gas injection rate. This means the effect of the interaction between wells on gas lift are both the reduction of the efficiency of the injection operation and the shifting of the optimal point to a lower injection rate. Hence, conventional single well analysis is proven no longer applicable in real field problem.