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All Journal Jurnal Offshore: Oil, Production Facilities, and Renewable Energy
Nesta, Alesandro
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Earth & Planetary Sciences Energy Engineering Mechanical Engineering

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Probabilistic Assessment of Well Production Capacity in the Dieng Geothermal Field Using Monte Carlo Simulation and Jiwa Flow Modeling Nesta, Alesandro
Jurnal Offshore: Oil, Production Facilities and Renewable Energy Vol. 9 No. 1 (2025): Jurnal Offshore: Oil, Production Facilities and Renewable Energy
Publisher : Proklamasi 45 University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jo.v9i1.2144

Abstract

The Dieng Geothermal Field, located in Central Java, Indonesia, is a high-temperature geothermalsystem with two primary reservoirs: Sileri and Sikidang. This study aims to estimate the electricityproduction capacity of the reservoir using a probabilistic approach and Monte Carlo simulation with JiwaFlow software. The methodology involves modeling well trajectory, casing data, and feed zonecharacteristics, incorporating uncertainty in reservoir parameters to generate probability distributioncurves. The simulation results indicate that at 50% probability (P50), the estimated electricity capacity is8.47 MWe, increasing to 11.66 MWe at 90% probability (P90), which is classified as proven reserves. At99% probability (P99), the estimated capacity reaches 14.06 MWe, representing possible maximumreserves. These findings suggest that the Dieng reservoir has significant geothermal energy potential,predominantly characterized as a steam-dominated system, which is optimal for power generation. Thestudy highlights that electricity production can be enhanced through reservoir management optimizationand additional well drilling. The results provide a scientific basis for planning geothermal development,particularly in the expansion of Dieng Unit-2. Future research should focus on improving the accuracy ofcapacity estimations through real-time reservoir monitoring and extended field studies.Keywords: Dieng Geothermal Field, Monte Carlo Simulation, Jiwa Flow, Probabilistic Analysis
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