#TITLE_ALTERNATIVE#

• Main Author: AMIN (NIM : 12214022), SIDIQ
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/30945
• Institution: Institut Teknologi Bandung

The oil well X on the Offshore North West Java (ONWJ) field was chosen as the object in this study. This well has been producing from 1996 until now. During well production the pressure drop is significant that it can not produce oil optimally. To overcome this condition, it is done by artificial lift method using gas lift method. Well X uses the conventional method of designing the spacing valve gas lift. The injection point or operating point is at a depth of 2955 ft MD. While the perforation zone is at a depth of 5353 ft MD. There is a difference of about 2398 ft MD between the injection point and the perforation zone. With a significant decrease in reservoir pressure it is feared that the fluid column height will be below the injection point that could cause the well can not produce. Therefore, it is recommended to do recompletion by designing valve gas lift using comparison between conventional method and equalization method. <br /> <br /> This study begins with a literature study to choose methods between conventional methods or equalization methods. Both methods will be applied to well X as the test object. The data on well X is quite complete including data flowing gradient survey (FGS) to find out the bottom well flow pressure (Pwf), static gradient survey (SGS) data to determine reservoir pressure (Pres), and well test data to find out the last production data from the well X. All of these data will be processed to determine the best method for well X. <br /> <br /> By applying both methods, the design of the spacing valve gas lift is obtained for each method. From this result will be comparison and evaluation to determine which method is more effective and efficient in spacing valve gas lift design. The presentation of the results will be presented in chart and table form. <br /> <br /> So far, the method used in the gas lift spacing valve design in the oil world using conventional methods. This method assumes that the killing fluid fills the tubing and annulus from the bottom of the well to the surface. Whereas in the field conditions occur equalization of killing fluid to the reservoir because the reservoir has a certain permeability value. The killing fluid column height will reach at a certain depth until the equalization process ends. This leads to the design of the spacing valve gas lifts withdrawal of the killing fluid gradient no longer from the surface, but from the depth point of the equalization. Under these conditions, the resulting cutting killing fluid and gas lift mandrel (GLM) required in the equalization method will be less than the conventional method, which is considered more effective, efficient and environmentally friendly. Therefore, the equalization method is proposed as an alternative to conventional methods.