Analisis pressure build up test dan deliverability test pada sumur a-01 lapangan ak
S umur gas A-01 berada di Lapangan AK merupakan sumur yangdilakukan analisis uji tekanan transient. Analisis yang dilakukan yaitu UjiPressure Build Up menggunakan Metode Horner Pendekatan Pseudo-Pressureψ(P) dan Uji Deliverability dengan Flow-After-Flow Test. Analisis ini dilakukandengan memanfaatkan Software Ecrin dan secara manual dengan Spreadsheetsehingga hasil dari kedua analisis tersebut dapat dibandingkan. Dengandilakukannya analisis Pressure Build Up Test ini dapat diketahui parameter –parameter karakteristik reservoir seperti permeability thickness (kh), permeabilitas(k), dan faktor skin (s’). Dari analisis ini dapat diketahui pula model lubangsumur, model sumur, model reservoir, dan model boundary. SedangkanDeliverability Test bertujuan untuk mengetahui kemampuan reservoir dalammengalirkan gas dari dasar sumur atau dapat disebut juga dengan Absolute OpenFlow Potential (AOFP). Hasil analisis yang diperoleh dengan menggunakanSoftware Ecrin menunjukkan model lubang sumur adalah Constant WellboreStorage, model sumur Vertical Well, model reservoir Two Porosity PSS, danboundary model Rectangle. Kemudian, nilai karakteristik reservoir yang diperolehuntuk permeability thickness (kh) menggunakan Software Ecrin dan Spreadsheetsecara berturut-turut adalah 130 md.ft dan 124,201 md.ft, untuk permeabilitas (k)sebesar 3,24 md dan 3,105 md, untuk faktor skin (s’) sebesar -1,84 dan -2,509.Hasil analisis Deliverability Test metode Flow-After-After Test denganmenggunakan Software Ecrin dan secara manual tersebut diperoleh harga AOFPberturut-turut sebesar 16.894,1 MSCFD dan 16.933,43 MSCFD.
T ransient pressure test analysis was performed on the A-01 gas well in theAK Field. The analyses performed were the Pressure Build Up Test with theHorner Method using the Pseudo-Pressure (P) Approach and the DeliverabilityTest utilizing the Flow-After-Flow Test. This study was done using both of EcrinSoftware and Spreadsheets, so that the results of the two can be compared. ThePressure Build Up Test analysis can be used to determinereservoir characteristics such as permeability thickness (kh), permeability (k),and skin factor (s\'). Additionally, the wellbore model, well model, reservoirmodel, and boundary model are all recognized through this analysis. While theDeliverability Test seeks to determine the reservoir\'s ability to drain gas from thewell\'s bottom, it is also known as the Absolute Open Flow Potential (AOFP). TheEcrin Software analysis results indicate that the wellbore model is ConstantWellbore Storage, well model is Vertical Well models, reservoir model is TwoPorosity PSS reservoir models, and the boundary model is Rectangle. Thereservoir characteristic values obtained for permeability thickness (kh) usingEcrin Software and Spreadsheet are 130 md.ft and 124.201 md.ft, for permeability(k) are 3.24 md and 3.105 md, for skin factor (s\') of -1.84 and -2.509. The resultsof the Deliverability Test analysis using the Flow-After-After Test method usingEcrin Software and manually obtained AOFP prices of 16,894.1 MSCFD and16,933.43 MSCFD.