| Title | The Identification of Geothermal Reservoir from Exploration Data in Bang Hot Spring, Central Vietnam |
|---|---|
| Authors | TRAN Anh Vu, DOAN Van Tuyen, TRAN Tuan Anh, DINH Van Toan |
| Year | 2017 |
| Conference | Stanford Geothermal Workshop |
| Keywords | Heat flow, hot spring, Magnetotelluric, Reservoir, Vietnam |
| Abstract | The previous study of geochemical analysis of hot water samples outcrop on different areas together with geological conditions and geothermal regimes entire territory of Vietnam has been identified a large number of geothermal resources in Central region with the indication on young magmatic origin is prospective as worldwide for electrical generation. The one prospect of Bang hot spring - Quang Binh province had been selected for implementation of the exploration phase. A combination of geological, geochemical, geophysical methods, temperature measurement in shallow drilling hole (depth 250 m) has been applied in period from 2012 to 2015 for identifying the location, structure and temperature parameters of the geothermal system-reservoir. Resistivity model from Magnetotelluric survey and Geochemical isotopic analysis has identified the location and structure of the reservoir of a typical hydro-geothermal system with magmatic origin. Temperature gradient and heat flow at the shallow drill hole are riched 4.1 oC/100 m and 83.4 mW/m2 respectivelly. Reservoir temperature has been estimated by geochemical thermometers and temperature modelling giving values in the range of 167-200 ◦C at the depth of more than 2 km. The obtained data allows to determine the suitable location for test drilling to the reservoir and suggest the next phase of the Geothermal Program in the area. |