Thermal Sources in Georgia
Important geothermal resources of Georgia are represented by numerous thermal sources and vents, few of them have been drilled. Energetic capacity of these drills is calculated to be equal to 2 billion kWh equivalent. Two main basins of thermal sources may be distinguished. In the Kolkheti Basin (Ohurei, Kindgi, Zugdidi, etc.) thermal waters have low mineralization degree, they are overheated (103-105° centigrade at vents) and characterized by high static pressure (13-17 atm). In the Eastern Georgia Basin (Lisi drill near Tbilisi) mineral waters have high sulfur and methane contents and temperature of about 65°C at the vent. The first group of thermal waters may be used for electricity production, hot water supply and civil heating whereas the second group is applicable for civil heating and health cure only.
Table below provides information on technical characteristics of some important Georgian thermal sources.
N° |
Source |
Host Rocks |
Tem-pera-ture, °C |
Mine-raliza-tion, g/l |
Main solved compounds |
Interval of water presence in drills, m |
Out-put, l/sec |
1 |
Ohurey |
Upper Cretaceous |
106 |
1.07 |
Ca |
2865-3300 |
1.07 |
2 |
Kingi |
Upper Cretaceous |
107 |
1.05 |
Ca |
2670-3100 |
4.30 |
3 |
Tsaishi |
Upper Cretaceous |
103 |
1.20 |
Ca, Mg |
700-1000 |
18.50 |
4 |
Zugdidi |
Upper Cretaceous |
105 |
0.85 |
Na, K, Ca, Mg |
1800-1880 |
60.20 |
5 |
Samtredia |
Upper Neogene |
50 |
1.80 |
Na, K |
1269-1280 |
5.20 |
6 |
Mendji |
Upper Cretaceous |
55 |
2.10 |
Na, K, Ca, Mg |
1816-2057 |
2.10 |
7 |
Lisi |
Paleogene |
64 |
0.30 |
Na, K |
505-1245 |
4.0 |