#TITLE_ALTERNATIVE#

• Main Author: FIRDAUS (NIM : 12212081), FANJI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/27143
• Institution: Institut Teknologi Bandung

Patuha geothermal field is located in west Java, Indonesia, about 50 km southwest of the city of Bandung. Patuha field is one of vapor-dominated geothermal system in Indonesia with liquid deep zone included and temperature about 210 – 230oC covering 20 km2. The steam cap about 700 m is underlying on huge deep liquid water zone that makes this system unique to be built in munerical simulation. Recently, Patuha field is operated by PT. Geodipa Energi which has produced 55 MWe to PLN in 2015. <br /> <br /> The reservoir performance is an important aspect while producing energy from the reservoir, in this case geothermal reservoir. The numerical simulation is a reliable tool to describe and predict the reservoir performance. For Patuha geothermal reservoir, the numerical simulation had been made by Schotanus (2013) following size 13.44 km × 10.34 km, 2,924 m in thickness and the result showed the modeled pressures and temperatures deviating from the well measurement, but the obtained profiles approached the pattern from the field data. In this study, a new numerical simulation of this field based on the coupled of data from Layman et al (2003) has been made using TOUGH2 following size of model 5 km × 5 km with reservoir area 5.5 km2 and 3,010 m in thickness . The results of this model revealed a good match, pressure and temperature, between the actual data (well data) and model in two wells for natural state condition. Thus, the results also showed the steam cap and the transition zone underlying the liquid deep zone. Furthermore, the heat and mass flows can be seen in productive zone. Based on this results, this new model is more representative than the previous model in the proven area of reservoir.