Geochemical Reservoir Analysis Of The Gunung Ungaran Geothermal Prospect, Semarang District, Central Java Province
| Main Authors: | Karyanto, ., Wahyudi, ., Suharno, ., Ari, Setiawan, Wiwit, Suryanto |
|---|---|
| Format: | Article PeerReviewed application/pdf |
| Bahasa: | eng |
| Terbitan: |
UGM
, 2012
|
| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/97045/1/10.pdf https://repository.ugm.ac.id/97045/ |
Daftar Isi:
- The Gunung Ungaran geothermal prospect situated within the Semarang District, Central Java Province. Geochemical data collected from sixteen location. The geochemical analysis using the ions balance, geothermometer and geoindikator analysis, doe to determine the reservoir characteristic and temperature conditions of the Gunung Ungaran geothermal prospect, Semarang District, Jawa Tengah Province. The tentative result, although the ions balance indicate that not good balance, but the geoindictor and geothermometer indicated that the characteristic of the reservoir should be acid with temperature more than 200° C. The discharge test measurements show that chemical composition of the reservoir water was analyzed by standard methods and subsequently classified using Cl-S04, HC03 and Cl-Li-B triangular diagram. A Na-K-Mg triangular diagram was used to classify waters according to the state of equilibrium at given temperatures. The geothermal waters are of sodium-acid type and from a relatively old hydrothermal system. Thermal fluid is in equilibrium with reservoir rocks. The calculated temperatures using Na-K geothermometers suggested the subsurface temperature is more than 325°C and Na-K-Mg geoindicator suggested the subsurface temperature is more than 300°C.