Supercritical CO2 geothermal reservoir modelling by Curie point depth analysis

Yasukuni Okubo; Kazumi Osato; Shoichi Yamano; Shunsuke Akazawa; Amane Terai

Presentation information

[J] Oral

S (Solid Earth Sciences ) » S-VC Volcanology

[S-VC28] Hydrothermal systems of volcanoes

Thu. May 30, 2024 9:00 AM - 10:15 AM Convention Hall (CH-A) (International Conference Hall, Makuhari Messe)

convener:Yasuhiro Fujimitsu(Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University), Wataru Kanda(Multidisciplinary Resilience Research Center, Institute of Innovative Research, Tokyo Institute of Technology), Muga Yaguchi(Meteorological Research Institute, JMA), Chairperson:Yasuhiro Fujimitsu(Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University), Wataru Kanda(Multidisciplinary Resilience Research Center, Institute of Innovative Research, Tokyo Institute of Technology)

9:45 AM - 10:00 AM

[SVC28-04] Supercritical CO2 geothermal reservoir modelling by Curie point depth analysis

*Yasukuni Okubo¹, Kazumi Osato¹, Shoichi Yamano¹, Shunsuke Akazawa¹, Amane Terai² (1.Geothermal Energy Research and Development Co. LTD., 2.Japan Organization for Metals and Energy Security)

Keywords:Curie point depth, Supercritical CO2, Lower limit of earthquakes, Japan

The Curie point depth is interpreted to represent an isotherm of Curie point of magnetite, 580°C, and Curie point analysis is used around the world as a method to delineate regional geothermal structure. Recently, the development of a new type of supercritical CO2 geothermal resources started, but geothermal structure is necessary to evaluate the resources. Here, we calculated the Curie point depth (Dcmag) nationwide from magnetic anomaly data. In addition, we determined the lower limit or cut-off depth of ordinary earthquakes, which is thought to depend on the geothermal structure, and compared it with Dcmag. Based on these results, we construct a model for a supercritical CO2 geothermal reservoir.