ANALYSIS OF SLIDING SLEEVE DOORS LEAKAGE AND THE IMPACT OF GAS LIFT INSTALLATION ON OIL PRODUCTION: A CASE STUDY OF WELL B-1 BACHELOR THESIS Bella Dina Fitriyani 12220005 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 2024 ANALYSIS OF SLIDING SLEEVE DOORS LEAKAGE AND THE IMPACT OF GAS LIFT INSTALLATION ON OIL PRODUCTION: A CASE STUDY OF WELL B-1 BACHELOR THESIS Bella Dina Fitriyani 12220005 Submitted as partial fulfillment of the requirements for the degree of BACHELOR OF ENGINEERING in Petroleum Engineering study program Approved by: Thesis Adviser, Bandung, 6 th August 2024 Steven Chandra, S.T., M.T. NIP. 199209182019031006 1 ANALYSIS OF SLIDING SLEEVE DOORS LEAKAGE AND THE IMPACT OF GAS LIFT INSTALLATION ON OIL PRODUCTION: A CASE STUDY OF WELL B-1 Bella Dina Fitriyani* and Steven Chandra ** Copyright 2024, Institut Teknologi Bandung Abstract This study addresses the challenge of declining oil production in well B-1, located in the "Y" Field offshore Java, Indonesia, primarily caused by leakage in the Sliding Sleeve Doors (SSD) and wax deposition. The objective is to analyze the impact of SSD leakage and gas lift installation on well productivity and flow assurance. A comprehensive methodology was used, starting with a literature review to understand the theoretical foundations, followed by data collection from well tests and modeling using a dynamic transient simulator. Sensitivity analysis was conducted on the Productivity Index (PI), leak diameter, and gas injection rate. Key findings indicate that SSD leakage results in significant fluid production through the annulus, initially dominated by gas and subsequently by liquid. The installation of a gas lift significantly increased the production rate from 1500 BOPD to 2200 BOPD. The study reveals that higher PI values and larger leak diameters correlate with increased flow rates and fluid volumes. Additionally, gas lift helps reduce wax formation at the leakage point. The results of this study emphasize the importance of integrating gas lift technology to enhance production efficiency and mitigate issues related to SSD leakage and wax deposition. Keywords: SSD Leakage, Flow Assurance, Wax Deposition. Sari Studi ini membahas tantangan penurunan produksi minyak di sumur B-1, yang terletak di Lapangan "Y" lepas pantai Jawa, Indonesia, yang disebabkan oleh kebocoran di Sliding Sleeve Doors (SSD) dan deposisi wax. Tujuannya adalah untuk menganalisis dampak kebocoran SSD dan pemasangan gas lift terhadap produktivitas sumur dan jaminan aliran. Metodologi komprehensif digunakan, dimulai dengan tinjauan literatur untuk memahami dasar-dasar teoritis, diikuti dengan pengumpulan data dari uji sumur, dan pemodelan menggunakan simulator transien dinamis.