Survey of the Casing Material Corrosion Problem for Supercritical Geothermal Development
- Key words
- material corrosion rate, super critical, pH, Cr equivalent, geochemistry
- Conference
- World Geothermal Congress
- Year
- 2020
- Session
- Advanced Technology (Magma, Geopressure, etc.)
- Language
- English
- Paper number
- 37014
Full text
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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.
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