| 1. |
Hiroyuki HONDA, Hiroyuki YAGI, Yasuhiro MITANI, Monitoring Flow Behavior of Supercritical CO2 in Porous Sandstones with Different Permeability by P-wave Velocity, Proceedings of Nineteenth International Conference on Flow Dynamics, 2022.07. |
| 2. |
Keigo Kitamura, Hiroyuki Honda, Kenya Matsuo, Hiro Ikemi and Yasuhiro Mitani, Monitoring CO2 penetration and storage in the brine-saturated low permeable sandstone by the geophysical exploration technologies, American Geophysical Union, 2018.12. |
| 3. |
Yuki Okajima, Yasuhiro Mitani, Hiro Ikemi, Takuto Hayashida, Satoru Kimura, Development of Offline Application Utilizing Geospatial Information for Field Survey at Large-Scale Disasters, 39th Asian Conference on Remote Sensing, 2018.10. |
| 4. |
Keigo Kitamura, Hiroyuki Honda, Kenya Matsuo, Hiro Ikemi and Yasuhiro Mitani, Impact of CO2 injection speed on CO2 behaviour in two types of sandstone, 14th Greenhouse Gas Control Technologies Conference, 2018.10. |
| 5. |
Keigo Kitamura, Hiroyuki Honda, Hiro Ikemi and Yasuhiro Mitani, Effect of CO2 injection speed and pore structure on CO2 behaviour in two types of sandstone, AOGS, 2018.06. |
| 6. |
Keigo Kitamura , Hiroyuki Honda, Hiro Ikemi and Yasuhiro MItani, Vp monitoring for channel formations of CO2-brine flow in two different types of sandstones, JpGU2018, 2018.05. |
| 7. |
Poppy INDRAYANI, Yasuhiro MITANI, Ibrahim DJAMALUDDIN, Ikemi HIRO, Assessment of Urban Vulnerability to Flood Using GIS Based Modeling Approach, International Symposium on Earth Science and Technology (CINEST), 2017.11. |
| 8. |
Poppy Indrayani, Yasuhiro Mitani, Ibrahim Djamaluddin and Ikemi Hiro, Spatial-Temporal Vulnerability and Risk Assessment Model for Urban Flood Scenario, 4th International Conference on Southeast Asian Natural Resources and Environmental Management, 2017.12. |
| 9. |
H. Honda, Yasuhiro Mitani, Hiro Ikemi, Keigo Kitamura, Permeability and storativity of low permeable rock under the supercritical co2 injection using flow pump method, 13th ISRM International Congress of Rock Mechanics 2015, 2017.01, Instead of carbon capture and geological storage (CCS) that does not rely on structural aquifers, injecting carbon dioxide into sedimentary rock deep underground has been considered. For advection velocity of the fluid is slow, the permeability of sedimentary rock deep underground is low. In order to perform the CCS on the low permeable sedimentary rock, it is necessary to clarify the behavior of long term storage properties of carbon dioxide (CO2). In this study, the permeability and storativity of CO2 injected into low permeable rock has been evaluated. The injection of supercritical CO2 has been conducted on the specimen of Ainoura sandstone (unit weight: 2.39 g/cm3, porosity: 11.9 %) saturated with water by using flow pump method. The experiment has been set up to reproduce te similar condition of deep underground reservoir under 20 MPa confining pressure, 10 MPa pore pressure, 35°C temperature and 3 μl/min CO2 injection rate. In order to prevent an increase in pore pressure, the boundary condition on the outlet side of specimen has been kept a constant pressure. As a result, it has been possible to observe step by step the change of the differential pressure between both ends of specimen. Furthermore, the relative permeability and specific storage of rock under supercritical CO2 injection has been examined by the theoretical analysis of flow pump permeability test incorporating Darcy's law for two-phase flow. It is observed that CO2 has been transmitted gradually while CO2 stored in the rock. It is also clarified that residual water has existed in specimen after showing the constant differential pressure in the end of the experiment. Using the results of the experiment, 3D core-scale flow-simulation by using TOUGH2 has been conducted due to confirm the flow of fluid and CO2 distribution in the specimen. From the experimental results and analytical solution to them, permeability and storativity are identified, and simulation results support the validity of the experimental results.. |
| 10. |
Ardy Arsyad, Yasuhiro Mitani, Hiro Ikemi, Determination of Permeability and Specific Storage of Reservoir Rocks Injected by Supercritical Carbon Dioxide Using Constant Pressure Permeability Method, 7th Asian Rock Mechanics Symposium, 2012.10. |
| 11. |
Ardy Arsyad, Yasuhiro Mitani, Comparative Assessment of Potential Ground Uplift Induced by Injection of CO2 into Ainoura, and Berea Sandstone Formations, International Symposium on Earth Science and Technology, 2012.09. |
| 12. |
Pachiri Hendra, Yasuhiro Mitani, Hiro Ikemi, Atsushi Morita, Development of water management modeling by using GIS in Chirchik river basin, Uzbekistan, International Symposium on Earth Science and Technology, 2012.09. |
| 13. |
Hiro Ikemi, Yasuhiro Mitani, Hiroaki Yoshitake, Yasuyuki Sameshima, GIS Analysis for Topography and Vegetation Cover in Mountainous Catchments, International Symposium on Earth Science and Technology, 2012.09. |
| 14. |
Yasuyuki Sameshima, Yasuhiro Mitani, Hiro Ikemi, Mei Guo, Shinya Ichimaru, Evaluation of the Incidence of Turbidity water factors and outflow potential of suspended solids, International Symposium on Earth Science and Technology, 2011.12. |
| 15. |
Ning Jia, Yasuhiro Mitani, Hiro Ikemi, DJAMALUDDIN IBRAHIM, GIS-Based Hazard Mapping for Debris Flow Triggerd by Slope Failure in a Moutainous Area, Japan, International Symposium on Earth Science and Technology, 2011.12. |
| 16. |
Ardy Arsyad, Yasuhiro Mitani, Hiro Ikemi, Shiro Oura, Experimental and numerical study of hydromechanical response of low permeable rocks during CO2 injection, International Symposium on Earth Science and Technology, 2011.12. |
| 17. |
Kazuya Yasuhara, Hideo Komine, Satoshi Murakami, GUANGQI CHEN, Yasuhiro Mitani, Geo-hazards Induced by Global Climate Change: An Assessment of Impacts, Risks, and Adaptation Strategies, 9th JGS Symposium on Environmental Geotechnics, 2011.05. |
