| Title | Survey of the Casing Material Corrosion Problem for Supercritical Geothermal Development |
|---|---|
| Authors | Norio YANAGISAWA, Yoshio MASUDA, Hiroshi ASANUMA |
| Year | 2020 |
| Conference | World Geothermal Congress |
| Keywords | material corrosion rate, super critical, pH, Cr equivalent, geochemistry |
| Abstract | The material corrosion is one of issue for the development of super-critical geothermal resources. To solve the problems, we tried to estimate the behavior of corrosive fluid of the several developing stage including drilling, production using Slveq-Chim by Reed (2014) and the material corrosion rate based on estimation formula using material Cr equivalent by Kurata et al.(1992). The highest material corrosion rate shows at sub-critical temperature zone from 300 to 350 degree C and higher pressure than saturation curve. And the material corrosion rate depends on pH based on H2S/CO2 ratio. This estimation results are one of important information for casing program. |