GAS LIFT OPTIMIZATION WITH DEEP GAS LIFT (DGL) FOR WELL SID-01 BACHELOR THESIS Alfia Dian Nur Salma 12219063 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 2023 Koleksi digital milik UPT Perpustakaan ITB : Hanya dipergunakan di area kampus ITB untuk keperluan pendidikan dan penelitian GAS LIFT OPTIMIZATION WITH DEEP GAS LIFT (DGL) FOR WELL SID-01 BACHELOR THESIS Alfia Dian Nur Salma 12219063 Submitted as partial fulfillment of the requirements for the degree of BACHELOR OF ENGINEERING in Petroleum Engineering study program Approved by: Thesis Adviser II, Prasandi Abdul Azis, S.Si., M.T. 118110039 Field Adviser, Cio Cio Mario, S.T., M.T. Koleksi digital milik UPT Perpustakaan ITB : Hanya dipergunakan di area kampus ITB untuk keperluan pendidikan dan penelitian 1 GAS LIFT OPTIMIZATION WITH DEEP GAS LIFT (DGL) FOR WELL SID-01 Alfia Dian Nur Salma*, Wijoyo Niti Daton**, Prasandi Abdul Aziz**, and Cio Cio Mario*** Copyright 2023, Institut Teknologi Bandung Abstract Gas lift is widely used artificial lift for enhancing the oil wells production by injecting the pressured gas into the lower section of tubing so the produced fluid will flow easier. It is suitable for offshore and deviated wells, such as SID-01 which has been produced with a gas lift system. The gas lift injection point of this well is located far from the perforation. Therefore, the DGL system is installed to deepen the injection depth and increase production without pulling out the tubing, which requires more time and cost. The simulation and modeling of the study were conducted with commercial software to design and optimize the gas lift configuration so that the production of the well would be increased. By applying sensitivity analysis, the optimal depth and rate of gas lift injection were estimated based on the well's response to each parameter. Optimized gas lift design also takes consideration for the initial gas lift mandrel set up. After analyzing gas lift injection depth and rate, the optimal model with injection depth of 6800 ft.MD and rate of 3 mmstb/day will increase the oil production of the well by 69.2% with pressure drawdown increase of 65.6%. Keyword: Gas Lift, DGL system, injection depth, production, optimization. Sari Gas lift adalah metode pengangkatan buatan yang umum digunakan untuk meningkatkan produksi sumur minyak dengan menginjeksikan gas bertekanan ke tubing bagian bawah sehingga mempermudah aliran fluida produksi. Metode ini cocok untuk sumur lepas pantai dan berarah, seperti sumur SID-01 yang telah berproduksi dengan sistem lift gas. Titik injeksi gas lift dari sumur ini terletak jauh dari perforasi. Oleh karena itu, sistem DGL dipasang untuk memperdalam titik injeksi dan meningkatkan produksi tanpa menarik tubing, yang membutuhkan lebih banyak waktu dan biaya. Simulasi dan pemodelan studi ini dilakukan dengan perangkat lunak komersial untuk mendesain dan mengoptimalkan konfigurasi gas lift sehingga produksi sumur meningkat. Dengan menerapkan analisis sensitivitas, kedalaman dan jumlah injeksi gas lift dipilih berdasarkan respons sumur terhadap setiap parameter. Optimalisasi desain gas lift juga mempertimbangkan konfigurasi mandrel gas lift yang telah terpasang. Setelah menganalisis kedalaman dan jumlah injeksi gas lift, diperolah model optimal dengan kedalaman injeksi 6800 ft.MD sebesar 3 mmstb/hari akan meningkatkan produksi minyak sebesar 69,2% dan peningkatan pressure drawdown sebesar 65,6%. Kata kunci: Gas lift, sistem DGL, kedalaman injeksi, produksi, optimisasi.