Abstract
An integrated numerical modeling of reservoir and power plant thermodynamics is proposed to assess the Patuha geothermal field development strategy. Power plant technologies, namely as dry-steam cycle unit (DSCU) and integrated geothermal combined-cycle unit (IGCCU), were selected for field development strategy options. TOUGH2 was used to simulate the effects of these technologies on reservoir production sustainability. The selection of power plant technology and field production strategy clearly affects the performance of the reservoir. The simulation results show that the IGCCU is less sustainable if hot fluid is produced only from the steam zone. However, the energy extraction from the brine zone is proven advantageous to maintain the steam zone pressure. In addition, higher injection rates into the brine zone from IGCCU power plant can yield to higher electrical power generation than DSCU.
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