The framework of risk assessment system for Carbon Dioxide Capture and Storage (CCS) is proposed, especially for enhanced recovery of gas, oil, and gas hydrates. Based on the protocol proposed by the EU, the framework of enhanced CCS has been modi...
Proceedings of the International Offshore and Polar Engineering Conference 85-89 2014年1月
Huge amount of tsunami deposits remain after the large earthquake and tsunami occurred on March 11, 2011. This event may bring a possibility of environmental pollutions, particularly in the environment of soil and sediments around coastal areas of...
Selection of Land Disposal Sites for Solid Waste Using GIS and Risk Assessment Theories: A Case study for Kandy District, Sri Lanka
B.M.R.S.Balasooriya, M.Vithanage, M.I.M.Mowjood, K. Kawamoto, M. Zhang, T. Komai
Proceedings of International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development 13 160-167 2013年9月 [査読有り]
Journal of Nuclear Science and Technology 50 674-681 2013年7月
We developed a rapid method for concentrating and measuring radiocesium ( 134 Cs and 137 Cs) dissolved in fresh water using nonwoven fabric impregnated with Prussian blue (PB) as a radiocesium absorber in combination with gamma-ray spectrometry us...
Y. Sakamoto, Y. Suzuki, A. Tanaka, N. Tenma, T. Komai, T. Yamaguchi
Proceedings of the ISOPE Ocean Mining Symposium 58-64 2011年12月
We conducted experimental study on multi-phase flow behavior consisting of supercritical CO 2 and water in porous media. Grain size was changed as an experimental parameter in order to consider the effect on permeability characteristics. Using obt...
Proceedings of the ISOPE Ocean Mining Symposium 49-53 2011年12月
A proton nuclear magnetic resonance (NMR) system combined with a permeability measurement system has been used to clarify the relation between permeability and methane-hydrate saturation of methanehydrate- bearing sediment with regard to effective...
Proceedings of the International Offshore and Polar Engineering Conference 1-4 2014年1月
Huge amount of methane hydrates worldwide exist at offshore and onshore areas, particularly in reservoirs of marine sediments. Because the development of methane hydrates is of great interest for future energy of natural gas, a lot of R & D projec...
Proceedings of the ISOPE Ocean Mining Symposium 44-48 2011年12月
In this paper, we propose the framework of risk assessment system for CCS, carbon capture and storage, especially for enhanced recovery of gas, oil and gas hydrates. Based on the protocol proposed by US and European institutions, the framework of ...
N. Tsuchiya, Y. Ogawa, R. Yamada, S. Yamasaki, C. Inoue, T. Komai, J. Hara, Y. Kawabe, T. Shiratori, S. Kano
Water-Rock Interaction - Proceedings of the 13th International Conference on Water-Rock Interaction, WRI-13 673-676 2010年12月
GIS based Geosphere Environmental Informatic Universal System 'GENIUS' has been developed, which includes topographical, geological, geochemical and other geosphere environmental digital maps covering the entire area of Japan. This system also con...
T. Komai, Y. Sakamoto, T. Kawamura, M. Inui, H. Haneda
6th Gas Hydrates International Conference [ICGH] (Vancouver, British Columbia, 7/6-10/2008) Proceedings 2008年12月
The method of CO2 sequestration using gas hydrates has the advantages that (1) the CO2 is stored as a solid which reduces the risk for leakage; (2) a geological containment structure is not required; (3) it could be suitable for direct flue gas in...
Proceedings of the International Offshore and Polar Engineering Conference 2005 324-328 2005年12月
The national project of methane hydrate development in Japan (MH21) started in 2001 and has made a great progress in these years. In the project operated by MH21 research consortium, we have carried out extensive experimental and computational R &...
M. Inui, T. Komai, Y. Sakamoto, T. Kawamura, A. Ando, H. Kagemoto
Proceedings of the International Offshore and Polar Engineering Conference 2005 355-359 2005年12月
There are some proposals for carbon dioxide (CO 2 ) storage in underground structures, such as oil/gas reservoirs, aquifers and sediments. One of the attractive methods of CO 2 sequestration is that the exhaust gas containing CO 2 is directly isol...
M. Inui, T. Komai, Y. Sakamoto, T. Kawamura, A. Ando, H. Kagemoto
Proceedings of the International Offshore and Polar Engineering Conference 2005年8月
There are some proposals for CO 2 storage in underground structures, such as oil/gas reservoirs, aquifers, and sediments. One of the attractive methods of CO 2 sequestration is that the exhaust gas containing CO 2 is directly isolated in marine ge...
Takeshi Komai, Yoshishige Kawabe, Taro Kawamura, Ji Ho Yoon
Proceedings of the International Offshore and Polar Engineering Conference 321-326 2003年12月
In this paper we discuss on fundamental properties of formation and dissociation of gas hydrates to reveal the dynamic behavior in the process of replacement and reformation of CO 2 hydrate. Raman spectroscopy was used to observe directly the beh...
Reconstruction and Restoration after the Japan 2011 Earthquake and Tsunami
Catherine Chagué‐Goff, Kazuhisa Goto, Daisuke Sugawara, Yuichi Nishimura, Takeshi Komai (担当:共著, 範囲:Restoration measures 1 after the 2011 Tohoku‐oki Tsunami and their impact on tsunami research)
SPRINGER 2016年10月
Reports of Research and Investigation on Multiple Geological Hazards Caused by Huge Earthquakes
Takeshi Komai, Yoshishige Kawabe, Junko Hara, Yasuhide Sakamoto, Ming Zhang (担当:共著, 範囲:Environmental risk caused by tsunami)
Research PlanningOffice for Geological Survey and Apllied Geoscience 2015年4月
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