| Title | The Initial-State Geochemistry as a Baseline for Geochemical Monitoring at Ulubelu Geothermal Field, Indonesia |
|---|---|
| Authors | MULYANTO, Anjani PUSPADIANTI, Jodhi P. GIRIARSO, Dradjat B. HARTANTO |
| Year | 2015 |
| Conference | World Geothermal Congress |
| Keywords | geochemistry, baseline, Ulubelu |
| Abstract | Ulubelu Geothermal Field is the newest operating geothermal field in Indonesia that is operated from the end of 2011 with installed capacity of 110 MW. As a reference in the geochemical production monitoring activities, a baseline is made by using chemical data from 7 active production wells that is collected during the discharge test is performed. It is expected will assist in monitoring the changes in the chemical fluid composition from the production wells in response to fluid extraction from the reservoir as well as the response of brine and condensate reinjection into the reservoir. The relationship between the enthalpy-chloride, the chloride distribution, the distribution of SiO2, the NCG distribution, and the temperature distribution was made to see the condition of the geochemistry reservoir in the early phase of production and as a baseline monitoring program planned in the exploitation phase. The geochemical distribution map presenting hydrologic patterns that occur in the reservoir, where the fluid moves from north to south in the Ulubelu system by following the structure patterns in the field. This chemical distribution pattern also confirmed the presence a thin steam zone in the reservoir. All Trends are illustrated in initials condition will likely change rapidly along with the effectiveness of the management of production and reinjection applied. |