[S-VC48] [JJ] Hydrothermal systems of volcanoes

[SVC48-04] Geochemical simulation for hydrothermal activity

*Norio Yanagisawa¹ (1.Geothermal Energy Team, Renewable Energy Research Center, National Institute of Advanced Industrial Science and Technology)

Keywords:geochemical simulation, chemical composition, degas

The estimation of geochemcal change in volcanic and geothermal process is important. And the geochemical calculator (simulator), for example, Solveq-Chiller, is useful tool to calculate of fluid change.
Especially, in Hijiori EGS field, calcite precipite with CO₂ gas release with pH increasing from hot water fluid due to rapidly super-saturated as calcite calculated by Solveq-Chiller.
And we calculated in the case of reaction between CO₂ gas and fluid, mass balance and case study of CO₂ gas injection simulation using Hijiori EGS system.
And the phase balance have to be considered in other volacanic and geothermal system and we will show other field examples.