[2F01-06] Natural resources development(1)

11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)Japanese

[2F05] Study on a CO₂ leak monitoring method in CCS using hydrogen as a tracer

○Yuichi Sugai¹, Atsushi Miyazono², Yuki Kobayashi³, Yuki Horiuchi³, Akihiro Kono³ (1. Faculty of Engineering, Kyushu University, 2. Graduate School of Engineering, Kyushu University, 3. INPEX CORPORATION)

Keywords:

CCS,Tracer,Hydrogen

CO₂ separated from H₂ produced in refineries contains trace amounts of residual H₂. When the CO₂ is stored in subsurface with the residual H₂, the H₂ may diffuse ahead of the CO₂, and may leak from the reservoir if there is a leakage pathway. In this study, we investigated a method to monitor the H₂ as a tracer at the surface to predict CO₂ leakage at an early stage. We injected a gas mixture of hydrogen and CO₂ into the ground from a well in the field and monitored them at the surface. As a result, it was confirmed that H₂ tends to leak earlier than CO₂.