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The exploration and evaluation activities in Azerbaijan indicate a high potential for geothermal development. Prospective sources are recommended for balneological, industrial, and energy applications. Use of thermal waters for greenhouse heating in the Lenkoran region, Kuraside zone (Djarly, Muradkhanly, Sor-Sor), Gandja, and Yalama-Khudat regions are found to be promising; the high mineral content of these waters (more than 15 g/1) is typical.
The production capacity of the Lenkoran, Massaly, and Astara regions is estimated to be about 25,000 m³ day. Wells have produced waters with wellhead temperatures of 40°C and rates of 40 l/s.

In the Kura Depression, thermal waters in the 30° -70°C range are found at 200-4,500 m depth. In the Djarly region, wellhead temperatures are 70°-100°C, and the total mineral content is 40 g/l. Thermal waters with similar mineral content are found in Muradkhanly, with surface temperatures of 62°C.

In the Caspian side of the Kuba zone, at a depth of 1,400 m,fresh bicarbonate-calcium-sodium hot waters were found with temperatures of up to 55°C and flow rates with a range of 1-45 l/s. The Khudat region is characterized by 82°C surface temperatures and flow rates of 50 l/s with salt concentration up to 60 g/l.

Chloride-sodium and chloride-bicarbonate-sodium 70°-90°C thermal waters with 2-15 g/l mineral content and total flow rate of 8,000 m³/day are found in the Absheron zone. There are wells in the Baku region producing 70°C H₂S waters at 400-500 m³/day flow rates. The Istisu health resort is famous for its mineral springs which are used for medical purposes. Carbonic acid-bicarbonate-sulfur-sodium 28°-75°C waters are characteristic in this region.

Taken from:K. Ramazanov, "Azerbaijan's geothermal energy potential", IGA News, 1994, n.16, p.5