Electronic Theses and Dissertation

Gas alam merupakan sumber energi yang tidak dapat diperbaharui, sehingga selama proses produksi berlangsung, jumlah produksi yang tersedia akan berkurang serta dapat menimbulkan kerusakan formasi seiring dengan bertambahnya waktu produksi sumur tersebut. Pengujian sumur adalah aspek penting dalam perencanaan pengembangan lapangan dan peningkatan produktivitas sumur. oleh karena itu dilakukan pengujian sumur seperti pressure build up test dan deliverability test dengan tujuan menganalisis kerusakan formasi dan laju produksi pada sumur X reservoir XA. Pada penelitian ini, data dari pressure build up test dianalisis dengan metode horner, sementara deliverability test menggunakan metode flow after flow untuk melihat laju alir sumur. Pengolahan data dilakukan dengan metode konvensional (Rawlin-Schelhard)
untuk menetapkan Absolute Open Flow Potential (AOFP) dan kurva Inflow Performance Relationship (IPR). Berdasarkan hasil analisis dari pressure build up test, menghasilkan nilai permeabilitas sebesar 6,44 mD, skin factor sebesar +7,2 dengan penurunan tekanan akibat adanya skin sebesar 1081,82 Psi, radius of investigation sebesar 140,3, dan flow efficiency sebesar 0,57 menunjukkan bahwa sumur telah mengalami kerusakan formasi. Uji deliverability dengan metode flow after flow menghasilkan nilai absolute open flow potential (AOFP) sebesar 168,00626 MMSCFD (Million Standard Cubic Feet per Day) dengan laju alir optimum sebesar 100,803756 MMSCFD, dimana nilai slope (n) sebesar 0,747398 menunjukkan bahwa terjadi aliran turbulensi pada sumur gas dengan koefisien stabilized flow performance (Cs) sebesar 1214,712505 MMSCFD/psi2 dan laju alir produksi gas (Qgas) sebesar 68,269118 MMSCFD.

Kata Kunci: Pressure Build Up Test, Deliverability Test, Laju Alir Sumur

Natural gas is a non-renewable energy source, so that during the production process, the amount of available production will decrease and can cause formation damage as the well production time increases. Well testing is an important aspect in planning field development and increasing well productivity. Therefore, well tests were carried out such as pressure build up tests and deliverability tests with the aim of analyzing formation damage and production rates at well X reservoir XA. In this research, data from the pressure build up test was analyzed using the Horner method, while the deliverability test used the flow after flow method to see the well flow rate. Data processing was carried out using conventional methods (Rawlin-Schelhard) to determine the Absolute Open Flow Potential (AOFP) and Inflow Performance Relationship (IPR) curves. Based on the analysis results from the pressure build up test, it produces a permeability value of 6.44 mD, a skin factor of +7.2 with a pressure drop due to the skin of 1081.82 Psi, a radius of investigation of 140.3, and a flow efficiency of 0 .57 indicates that the well has experienced formation damage. The deliverability test using the flow after flow method produces an absolute open flow potential (AOFP) value of 168.00626 MMSCFD (Million Standard Cubic Feet per Day) with an optimum flow rate of 100.803756 MMSCFD, where the slope (n) value is 0.747398 indicating that there is turbulent flow in the gas well with a stabilized flow performance coefficient (Cs) of 1214.712505 MMSCFD/psi2 and a gas production flow rate (Qgas) of 68.269118 MMSCFD. Keywords: Pressure Build Up Test, Deliverability Test, Well Flow Rate