Geothermal fluid of Cooper-Basin Australia

Abstract

Geochemistry of production fluid at Cooper-Basin Enhanced Geothermal System (EGS) field in Australia was analyzed. At production test and circulation test in 2008, Cl concentration was ranged from 7500 to 8900 ppm, Na was from 3800 to 5100 ppm and K was from 560 to 700 ppm. The ratio of Na/K was ranged from 5.9 to 7.3 and this was almost same as the result of water-rock interaction experiment with 250°C and 40 bar circulation system using granite rock at Cooper-Basin.