Electronic Theses and Dissertation

PT Pema Global Energi, sebagai salah satu perusahaan yang bergerak di sektor hulu minyak dan gas terus berupaya untuk mengoptimalkan produksi. Akan tetapi, upaya untuk mengoptimalkan produksi seringkali dihadapkan pada berbagai tantangan teknis dan operasional seperti adanya kerusakan formasi. Untuk mengatasi tantangan tersebut, salah satu pendekatan yang diambil yaitu melalui pengujian sumur. Pengujian sumur yang umum dilakukan yaitu pressure build-up test dan deliverability test. Tujuan dari pengujian sumur ini ialah untuk mengetahui karakteristik reservoir dan laju produksi pada Sumur Y Reservoir XB. Dalam penelitian ini, pressure build up test dilakukan menggunakan Metode Horner untuk mendapatkan nilai permeabilitas, skin, penurunan tekanan akibat adanya skin, radius of investigation, dan flow efficiency. Sementara itu, deliverability test dilakukan menggunakan Metode Back Pressure Test untuk mendapatkan nilai absolute open flow potential (AOFP), laju alir gas, dan laju alir optimum. Hasil pengujian pressure build up mengindikasikan bahwa Sumur Y Reservoir XB mengalami kerusakan formasi, ditandai dengan nilai skin yang bernilai positif yaitu 5,45 dan nilai flow efficiency kurang dari satu yaitu 0,61. Penyebab utama dari kerusakan formasi tersebut disebabkan oleh operasi pemboran yang memungkinkan filtrat dari lumpur pemboran masuk ke dalam formasi, serta debris yang terbentuk selama proses perforasi sumur. Hasil uji deliverabilitas memperoleh nilai absolute open flow potential (AOFP) sebesar 1,23 MMSCFD, laju alir gas sebesar 1,2 MMSCFD, dan laju alir optimum sebesar 0,77 MMSCFD yang dianggap sebagai rentang optimal untuk mencapai keseimbangan antara efisiensi produksi dan pemeliharaan kondisi sumur dan reservoir yang baik.

Kata Kunci: Pressure Build-Up Test, Deliverability Test, Laju Alir Optimum

PT Pema Global Energi, as one of the companies engaged in the upstream oil and gas sector, continues to strive to optimize production. However, efforts to optimize production are often faced with various technical and operational challenges such as formation damage. To overcome these challenges, one approach taken is through well testing. Common well tests include pressure build-up tests and deliverability tests. The purpose of this well test is to determine the reservoir characteristics and production rate at Well Y of XB Reservoir. In this study, the pressure build-up test was conducted using the Horner Method to obtain the values of permeability, skin, pressure drop due to skin, radius of investigation, and flow efficiency. Meanwhile, the deliverability test was conducted using the Back Pressure Test Method to obtain the absolute open flow potential (AOFP) value, gas flow rate, and optimum flow rate. The results of the pressure build up test indicated that the Y Reservoir XB Well experienced formation damage, characterized by a positive skin value of 5.45 and a flow efficiency value of less than one, 0.61. The main cause of the formation damage was caused by drilling operations that allowed filtrate from the drilling mud to enter the formation, as well as debris formed during the well perforation process. The deliverability test results obtained an absolute open flow potential (AOFP) value of 1.23 MMSCFD, a gas flow rate of 1.2 MMSCFD, and an optimum flow rate of 0.77 MMSCFD, which is considered the optimal range to achieve a balance between production efficiency and maintenance of good well and reservoir conditions. Keywords: Pressure Build Up Test, Deliverability Test, Optimum Flow Rate