TRACER MODELLING UNTUK MEMPELAJARI KEHADIRAN KOLOM CAIRAN DI DALAM SUMUR PANASBUMI DOMINASI UAP

• Main Author: Martikno, Rudy
• Format: Final Project
• Language: Indonesia
• Subjects: Pertambangan dan operasi berkaitan
• Online Access: https://digilib.itb.ac.id/gdl/view/64370
• Institution: Institut Teknologi Bandung

The presence of liquid column inside vapor-dominated wellbore is an uncommon phenomenon that occur on the geothermal field. Some hypotheses was made to explain the phenomenon, which concluded that the existing of liquid column is result of condensing process and existence of reservoir liquid. Meanwhile, observation result showed that the liquid column’s temperature was identified as compress liquid. Therefore, the existing of liquid column comes from reservoir liquid may not be inferred, due to the temperature below the saturation temperature. The study of liquid column occurrence inside vapor-dominated wellbore has been conducted previously. The study inferred that the liquid column is from drilling mud during the drilling process. More advanced study was needed to confirm the conclusion since the previous study could not distinguish between two different fluid. Therefor, the study using two-component simulation reservoir, called as tracer simulation, is conducted. Tracer fluid was used to distinguish reservoir liquid and drilling fluid. The result of study shows that the liquid column presence inside vapor-dominated wellbore comes from drilling fluid. After 5 years production, liquid column as high as 500 meters were still bottom of well. Also, the result showed that tracer modelling is useful to distinguish the different fluids in the reservoir, which may be used to other studies.