Updated on 2024/07/28

Information

 

写真a

 
KITAMURA KEIGO
 
Organization
Faculty of Engineering Department of Earth Resources Engineering Associate Professor
School of Engineering （Concurrent）
Graduate School of Engineering Department of Earth Resources Engineering（Concurrent）
Graduate School of Engineering Department of Cooperative Program for Resources Engineering（Concurrent）
Title
Associate Professor
Contact information
メールアドレス
Tel
0928023327
External link

Degree

  • Ph.D

Research History

  • 財団法人地球環境産業研究機構(RITE)

    財団法人地球環境産業研究機構(RITE)

  • なし

Research Interests・Research Keywords

  • Research theme：Investigations for supercritical geothermal energy in northern Kyushu island, Hohi, area

    Keyword：Kyushu, Kuju region, Supercritical geothermal energy

    Research period： 2017.4

  • Research theme：Experimental study for　physical properties of rocks under high temperature condition

    Keyword：Elastic wave velocities, resistivity, high temperature condition

    Research period： 2015.4

  • Research theme：Experimental studies for Carbon Capture and Storage

    Keyword：CCS, Elastic wave velocity, resistivity

    Research period： 2006.4

Papers

  • Seismic and strain detection of heterogeneous spatial distribution of CO2 in high- permeable sandstone Reviewed

    Keigo Kitamura, Osamu Nishizawa, Kenneth T. Christensen, Takuma Ito, Robert J. Finley

    International Journal of Greenhouse Gas Control   72   65 - 73   2018.5

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.ijggc.2018.03.005

  • The potential of Vs and Vp-Vs relation for the monitoring of the change of CO2-saturation in porous sandstone Reviewed International journal

    Keigo Kitamura, Ziqiu Xue, Tetsuya Kogure, Osamu Nishizawa

    International Journal of Greenhouse Gas Control   25   54 - 61   2014.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.ijggc.2014.03.013

  • The study of heterogeneous two-phase flow around small-scale heterogeneity in porous sandstone by measured elastic wave velocities and lattice Boltzmann method simulation Reviewed

    Keigo Kitamura, Fei Jiang, Albert J. Valocchi, Shun Chiyonobu, Takeshi Tsuji, Kenneth T. Christensen

    Journal of Geophysical Research: Solid Earth   119 ( 10 )   7564 - 7577   2014.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/2014JB011281

  • Tracking supercritical geothermal fluid distribution from continuous seismic monitoring Reviewed

    Andajani, R.D., Tsuji, T., Ikeda, T., Matsumoto, S., Kitamura, K., Nishijima, J.

    Scientific Reports   13 ( 1 )   2023.5

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    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41598-023-35159-8

  • Evaluation of a potential supercritical geothermal system in the Kuju region, central Kyushu, Japan Reviewed

    Keigo Kitamura, Yuki Fujii, Haruhiro Inagaki, Koki Aizawa, Jun ichiro Ishibashi, Hiroki Saito, Yasuhiro Fujimitsu

    Geothermics   107   2023.1

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    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.geothermics.2022.102602

  • Effect of temperature on elastic properties of biotite and biotite-rich rocks: estimation from experiment and molecular dynamics simulation Reviewed

    Keigo Kitamura, Hiroshi Sakuma, Osamu Nishizawa

    Geophysical Journal International   231 ( 1 )   269 - 289   2022.10

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    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1093/gji/ggac187

  • Gas geochemistry of geothermal fluids from the Hatchobaru geothermal field, Japan Reviewed

    Jun ichiro Ishibashi, Kei Yamashita, Keigo Kitamura, Yasuhiro Fujimitsu, Syogo Oshima, Yumi Kiyota

    Geothermics   102   2022.6

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    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.geothermics.2022.102379

  • Electrical conductivity of H<inf>2</inf>O-NaCl fluids under supercritical geothermal conditions and implications for deep conductors observed by the magnetotelluric method Reviewed

    Norihiro Watanabe, Toru Mogi, Yusuke Yamaya, Keigo Kitamura, Hiroshi Asanuma, Noriyoshi Tsuchiya

    Geothermics   101   2022.5

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    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.geothermics.2022.102361

  • Magmatic fluid pathways in the upper crust: Insights from dense magnetotelluric observations around the Kuju Volcanoes, Japan Reviewed

    Koki Aizawa, Mitsuru Utsugi, Keigo Kitamura, Takao Koyama, Makoto Uyeshima, Nobuo Matsushima, Shinichi Takakura, Haruhiro Inagaki, Hiroki Saito, Yasuhiro Fujimitsu

    Geophysical Journal International   228 ( 2 )   755 - 772   2022.2

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    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1093/gji/ggab368

  • Viscosity-dependent empirical formula for electrical conductivity of H<inf>2</inf>O-NaCl fluids at elevated temperatures and high salinity Reviewed

    Norihiro Watanabe, Yusuke Yamaya, Keigo Kitamura, Toru Mogi

    Fluid Phase Equilibria   549   2021.12

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    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.fluid.2021.113187

  • Impacts of CO2 injection speed on two-phase flow and physical parameters in porous sandstone Reviewed

    Keigo Kitamura, Hiroyuki Honda, Osamu Nishizawa, Yasuhiro Mitani

    International Journal of Greenhouse Gas Control   107   2021.5

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    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.ijggc.2020.103228

  • Geological and engineering features of developing ultra-high-temperature geothermal systems in the world Reviewed

    Kyosuke Okamoto, Hiroshi Asanuma, Takuya Ishibashi, Yusuke Yamaya, H. Saishu, N. Yanagisawa, Toru Mogi, Noriyoshi Tsuchiya, Atsushi Okamoto, Shigemi Naganawa, Y. Ogawa, Kazuya Ishitsuka, Yasuhiro Fujimitsu, K. Kitamura, Tatsuya Kajiwara, S. Horimoto, Kuniaki Shimada

    Geothermics   82   267 - 281   2019.11

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    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.geothermics.2019.07.002

  • Effects of water saturation, fracture and salinity on electric and elastic properties of fractured geothermal rocks Reviewed

    Kazuki Sawayama, Keigo Kitamura, Yasuhiro Fujimitsu

    Journal of the Geothermal Research Society of Japan   41 ( 2 )   53 - 59   2019.4

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    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.11367/grsj.41.53

  • 室内透水試験における亀裂を有する安山岩の水飽和度と複素比抵抗および弾性波の関係 Reviewed

    澤山 和貴, 北村 圭吾, 藤光 康宏

    物理探査   71 ( 0 )   71 - 85   2018.10

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    Language：Japanese  

    <p>地震探査，電磁探査をはじめとした物理探査による地下流体の分布評価は，地熱資源をはじめとした流体資源の開発に不可欠であり，その探査精度を向上するためには岩石の物理的性質を実験的に詳細に調べる必要がある。本研究では，地熱貯留層を構成する岩石の水飽和度と複素比抵抗ならびに弾性波の関係を実験的手法によって明らかにすることを目的とし，岩石コアの室内透水試験を行った。実験供試体は，既存のマクロクラックに加え人工的に熱性亀裂を造成した安山岩（空隙率10.5%）のコア試料を用い，封圧20 MPa，温度25 ℃の条件下で透水試験中の水飽和度，浸透率，複素比抵抗（測定周波数10－2−105 Hz）および弾性波（P波，測定周波数250 kHz）を測定した。透水試験では，地熱貯留層内の水飽和度変化を再現するため，はじめに過熱蒸気を模擬した窒素ガスで空隙を充填させたのち，塩水（1 wt-% KCl溶液）を一定圧力で注入する窒素−塩水置換試験を行った。この試験の結果，塩水注入前の複素比抵抗は104 Ωmのオーダーであったのに対し，注入後の複素比抵抗は2桁低い102 Ωmのオーダーとなった。また水飽和度の上昇に伴う複素比抵抗の連続的な減少が確認され，この水飽和度と複素比抵抗の相関には有意な周波数依存性は認められなかった。同時に測定していたP波速度は，注入水圧や水飽和度の変化によってほとんど変化しなかった一方で，P波の振幅には水飽和度の上昇に伴う連続的な減衰が認められた。これらの結果から，複素比抵抗はP波速度に比べて微細な水飽和度の変化に対する感度が高いことが明らかとなり，地熱貯留層における緩やかな水飽和度の変化が，複素比抵抗によってモニタリング出来る可能性が示唆された。また水飽和度の上昇に伴うこれら物性値の変化から，本研究試料内の窒素−塩水二相流体流動挙動は2つのステージに分けられることが推察された。</p>

    DOI： 10.3124/segj.71.71

  • Seismic and strain detection of heterogeneous spatial distribution of CO2 in high- permeable sandstone Reviewed

    Keigo Kitamura, Osamu Nishizawa, Kenneth T. Christensen, Takuma Ito, Robert J. Finley

    International Journal of Greenhouse Gas Control   72   65 - 73   2018.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.ijggc.2018.03.005

  • Laboratory measurements on electric and elastic properties of fractured geothermal reservoir rocks under simulated EGS conditions Reviewed

    Kazuki Sawayama, Keigo Kitamura, Yasuhiro Fujimitsu

    Transactions - Geothermal Resources Council   42   2459 - 2475   2018.4

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    Language：Others   Publishing type：Research paper (other academic)  

  • Experimental Study on CO2 Saturation of Low-Permeability Sandstone under Supercritical CO2 Injection Reviewed International journal

    International Journal of Earth Science and Geophysics   2018.1

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

  • Monitoring CO2 Penetration and Storage in the Low Permeable Sandstone Reviewed International journal

    H. Honda, K. Kitamura, M. Imasato, H. Ikemi and Y. Mitani

    Proceedings of International Symposium on Earth Science and Technology 2017   2017.11

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    Language：Japanese   Publishing type：Research paper (international conference proceedings)  

  • Numerical Simulation and Laboratory Measurement of Hydraulic and Electric Properties of Digitalized Fractures Reviewed International journal

    K. Sawayama, T. Tsuji, T., K. Kitamura, and Y. Fujimitsu

    Proceedings of International Symposium on Earth Science and Technology 2017   404 - 407   2017.11

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    Language：Japanese   Publishing type：Research paper (international conference proceedings)  

  • Measurement of electrical impedance and P-wave velocity of a low permeable sandstone core during the displacement of saturated brine by CO2 injection Reviewed

    Honda, Hiroyuki, Kitamura, Keigo, Takaki, Shinnosuke, Ikemi, Hiro, Mitani, Yasuhiro

    13TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-13   114   4879 - 4885   2017.7

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    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1016/j.egypro.2017.03.1629

  • Experimental Study of Two-phase Fluid Flow in the Porous Sandstone by P-wave Velocity and Electrical Impedance Measurement Reviewed

    Keigo Kitamura, Hiroyuki Honda, Shinosuke Takaki, Masamich Nishihara, Kenneth T. Christensen, Yasuhiro Mitani

    Energy Procedia   114   4948 - 4953   2017.7

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    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1016/j.egypro.2017.03.1636

  • Experimental Study of Two-phase Fluid Flow in the Porous Sandstone by P-wave Velocity and Electrical Impedance Measurement Reviewed

    Keigo Kitamura, Hiroyuki Honda, Shinosuke Takaki, Masamichi Nishihara, Kenneth T. Christensen, Yasuhiro Mitani

    13th International Conference on Greenhouse Gas Control Technologies, GHGT 2016 Energy Procedia   114   4948 - 4953   2017.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.egypro.2017.03.1636

  • Measurement of Electrical Impedance and P-wave Velocity of a Low Permeable Sandstone Core during the Displacement of Saturated Brine by CO2 Injection Reviewed

    Hiroyuki Honda, Keigo Kitamura, Shinnosuke Takaki, Hiro Ikemi, Yasuhiro Mitani

    13th International Conference on Greenhouse Gas Control Technologies, GHGT 2016 Energy Procedia   114   4879 - 4885   2017.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.egypro.2017.03.1629

  • Mesurements of electrical impedance and elastic wave velocity of cracked andesite under laboratory fluid-flow test Reviewed International journal

    Kazuki Sawayama, Keigo Kitamura and Yasuhiro Fujimitsu

    Proceedings of International Symposium on Earth Science and Technology 2016   580 - 585   2016.12

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    Language：English   Publishing type：Research paper (international conference proceedings)  

  • Experimental study on the measurements of electrical impedance and P-wave velocity of a low permeable rock core during the displacement of saturated brine by CO2 injection Reviewed International journal

    Hiroyuki Honda, Mitsunori Imasatoa, Shinnosuke Takakia, Hiro Ikemia, Keigo Kitamura and Yasuhiro Mitani

    Proceedings of 9th Asia Rock Mechanics Symposium   2016.10

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    Language：English   Publishing type：Research paper (international conference proceedings)  

  • Measurement of electrical impedance and elastic wave velocity of a low permeable rock core during the displacement of saturated brine by CO2 injection Reviewed International journal

    Hiroyuki Honda, Shinnosuke Takaki, Mitsunori Imasato, Hiro Ikemi, Yasuhiro Mitani, Keigo Kitamura

    Proceedings of 2016 Spring Conference and General Assembly of Korean Society for Rock Mechanics   2016.5

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    Language：English   Publishing type：Research paper (international conference proceedings)  

  • Experimental study of two-phase fluid flow in the porous sandstone by P-wave velocity and electrical Impedance measurement Reviewed International journal

    Keigo Kitamura, Hiroyuki Honda, Sinnosuke Takaki and Yasuhiro Mitani

    the 12th SEGJ International Symposium   2015.11

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    Language：Japanese   Publishing type：Research paper (international conference proceedings)  

  • Heterogeneous two-phase flow in homogeneous porous sandstone Reviewed International journal

    Keigo Kitamura, Osamu Nishizawa, Takuma Ito and Robert J. Finley

    3rd International Workshop on rock physics   2015.4

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    Language：Japanese   Publishing type：Research paper (international conference proceedings)  

  • Reservoir characterization for site selection in the Gundih CCS project, Indonesia Reviewed

    Takeshi Tsuji, Toshifumi Matsuoka, Wawan Gunawan A. Kadir, Masami Hato, Toru Takahashi, Mohammad Rachmat Sule, Keigo Kitamura, Yasuhiro Yamada, Kyosuke Onishi, Djedi S. Widarto, Rio I. Sebayang, Agung Prasetyo, Awali Priyono, Tutuka Ariadji, Benyamin Sapiie, Eko Widianto, Ariesty Ratna Asikin

    12TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-12   63   6335 - 6343   2015.1

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    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1016/j.egypro.2014.11.666

  • Permeability and storativity of low permeable rock under the supercritical co2 injection using flow pump method

    H. Honda, Yasuhiro Mitani, Hiro Ikemi, Keigo Kitamura

    13th ISRM International Congress of Rock Mechanics 2015 13th ISRM International Congress of Rock Mechanics   2015- MAY   1 - 8   2015.1

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    Language：English   Publishing type：Research paper (other academic)  

  • Permeability and storativity of low permeable rock under the supercritical co<inf>2</inf>injection using flow pump method

    H. Honda, Y. Mitani, H. Ikemi, K. Kitamura

    13th ISRM International Congress of Rock Mechanics   2015- MAY   1 - 8   2015.1

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    Permeability and storativity of low permeable rock under the supercritical co<inf>2</inf>injection using flow pump method
    © 2015 by the Canadian Institute of Mining, Metallurgy &amp; Petroleum and ISRM. 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 CO2injected into low permeable rock has been evaluated. The injection of supercritical CO2has been conducted on the specimen of Ainoura sandstone (unit weight: 2.39 g/cm3, porosity: 11.9 &#37;) 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 CO2injection 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 CO2injection has been examined by the theoretical analysis of flow pump permeability test incorporating Darcy&#039;s law for two-phase flow. It is observed that CO2has been transmitted gradually while CO2stored 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 CO2distribution 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.

  • Potential Evaluation of CO2 Reservoir Using the Measured Petrophysical Parameter of Rock Samples in the Gundih CCS Project, Indonesia Reviewed

    Keigo Kitamura, Yasuhiro Yamada, Kyosuke Onishi, Takeshi Tsuji, Shun Chiyonobu, Benyamin Sapiie, Alfian Bahar, Harya Danio, Algifari Muhammad, Aurio Erdi, Vani Mutia Sari, Toshifumi Matsuoka, Wawan Gunawan A. Kadir

    12TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-12   63   4965 - 4970   2015.1

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    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1016/j.egypro.2014.11.525

  • The study of heterogeneous two-phase flow around small-scale heterogeneity in porous sandstone by measured elastic wave velocities and lattice Boltzmann method simulation Reviewed

    Keigo Kitamura, Fei Jiang, Albert J. Valocchi, Shun Chiyonobu, Takeshi Tsuji, Kenneth T. Christensen

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH   119 ( 10 )   7564 - 7577   2014.10

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/2014JB011281

  • Preliminary Feasibility Study for On-Site Hydrogen Station with Distributed CO2 Capture and Storage System Reviewed

    Seiichro Kimura, Kuniaki Honda, Keigo Kitamura, Ikuo Taniguch, Kiminori Shitashima, Takeshi Tsuji, Shigenori Fujikawa

    12TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-12   63   4575 - 4584   2014.7

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    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1016/j.egypro.2014.11.490

  • The potential of V-s and V-p-V-s relation for the monitoring of the change of CO2-saturation in porous sandstone Reviewed

    Keigo Kitamura, Ziqiu Xue, Tetsuya Kogure, Osamu Nishizawa

    INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL   25   54 - 61   2014.6

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.ijggc.2014.03.013

  • Potential evaluation of CO2 reservoir using the measured petrophysical parameter of rock samples in the gundih CCS project, Indonesia Reviewed

    Keigo Kitamura, Yasuhiro Yamada, Kyosuke Onishi, Takeshi Tsuji, Shun Chiyonobu, Benyamin Sapiie, Alfian Bahar, Harya Danio, Algifari Muhammad, Aurio Erdi, Vani Mutia Sari, Toshifumi Matsuoka, Wawan Gunawan A. Kadir

    12th International Conference on Greenhouse Gas Control Technologies, GHGT 2014 Energy Procedia   63   4965 - 4970   2014.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.egypro.2014.11.525

  • Reservoir characterization for site selection in the Gundih CCS project, Indonesia Reviewed

    Takeshi Tsuji, Toshifumi Matsuoka, Wawan Gunawan A. Kadir, Masami Hato, Toru Takahashi, Mohammad Rachmat Sule, Keigo Kitamura, Yasuhiro Yamada, Kyosuke Onishi, Djedi S. Widarto, Rio I. Sebayang, Agung Prasetyo, Awali Priyono, Tutuka Ariadji, Benyamin Sapiie, Eko Widianto, Ariesty Ratna Asikin

    12th International Conference on Greenhouse Gas Control Technologies, GHGT 2014 Energy Procedia   63   6335 - 6343   2014.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.egypro.2014.11.666

  • Preliminary feasibility study for on-site hydrogen station with distributed CO2 capture and storage system Reviewed

    Seiichro Kimura, Kuniaki Honda, Keigo Kitamura, Ikuo Taniguch, Kiminori Shitashima, Takeshi Tsuji, Shigenori Fujikawa

    12th International Conference on Greenhouse Gas Control Technologies, GHGT 2014 Energy Procedia   63   4575 - 4584   2014.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.egypro.2014.11.490

  • Experimental and numerical study of residual CO2 trapping in porous sandstone Reviewed

    Keigo Kitamura, Tetsuya Kogure, Osamu Nishizawa, Ziqiu Xue

    GHGT-11   37   4093 - 4098   2013.1

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    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1016/j.egypro.2013.06.310

  • Experimental and numerical study of residual CO2 trapping in porous sandstone Reviewed

    Keigo Kitamura, Tetsuya Kogure, Osamu Nishizawa, Ziqiu Xue

    11th International Conference on Greenhouse Gas Control Technologies, GHGT 2012 Energy Procedia   37   4093 - 4098   2013.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.egypro.2013.06.310

  • 多孔質砂岩中に存在する低孔隙率の葉理面が超臨界CO2流動に与える影響:弾性波速度による検討 Reviewed

    北村圭吾, XUE Ziqiu, 千代延俊, 山田達也, 西澤修

    128 ( 8/9 )   511 - 518   2012.8

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    Language：Japanese  

    To better understand trapping mechanisms of CO2 in reservoir, we try to elucidate the effect of thin and low-porosity lamina in porous Tako sandstone on CO2 flow by experiments and numerical simulations. Tako sandstone is characterized by the well-developed and low porosity lamina, where the intergranular space is filled with precipitated iron-rich minerals. We measure P-wave velocities (Vp) in three channels which are crossing through high porosity zone (Ch.A), on a lamina (Ch.B), and beneath the lamina (Ch.C) during CO2 injection stage (drainage) and water re-injection stage (imbibition). In drainage, all channels show large Vp-reduction over 10 &#37;. In imbibition, they indicate Vp-increases but different recovery patterns with injecting CO2-saturated water. After 250 ml water injection, Vp of Ch.A and Ch.B almost recover from Vp-reduction in drainage. On the other hand, Vp of Ch.C still has a reduction about 4&#37;. We then try 2D core-scale flow-simulations by using TOUGH-2 to confirm the effect of lamina on fluid flow and pattern of CO2 distribution. In drainage, CO2 has large mobility and moves upward vigorously to the top-end of core at 20ml CO2-injection. After reaching the top-end, CO2 invades lamina zone and raises CO2-saturation during drainage. In enhanced case of difference between porosity-permeability relation, the result of simulation indicates the strong heterogeneity of CO2-distribution pattern, which shows clear low-CO2 saturation of the lamina zone and obvious high-CO2 saturation of the zone of direct beneath of lamina. In imbibition, CO2 saturation decreases rapidly after 40ml water injection. However, the zone of beneath the lamina keeps high CO2 saturation after 100ml water injection. These results suggest that the lamina in Tako sandstone behave as barriers of CO2 flow. This assumption is supported by results of Vp-measurement, because the channel of beneath a lamina still shows a Vp-reduction about 4&#37; after 250 ml water injection.

    DOI： 10.2473/journalofmmij.128.511

  • 多孔質砂岩中の定常流動状態における水‐超臨界CO2系の相対浸透率 Reviewed

    小暮哲也, 北村圭吾, 山田達也, 西澤修, XUE Ziqiu

    地学雑誌   120 ( 6 )   944 - 959   2011.12

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    Language：Japanese  

    &emsp;Relative permeability curves of water and supercritical CO2 (scCO2) were obtained for two porous sandstones under steady-state flow conditions. The present measurements provide accurate relative permeability values for water and scCO2, which is important to better understand the behavior of CO2 injected into the deep saline aquifer when carrying out carbon dioxide capture and storage (CCS). &emsp;We have developed a new method for measuring the volume of scCO2 and water under the same pressure and temperature conditions as in the porous rock employing a high-pressure water-CO2 separator. Water saturation in the sandstone was determined with a mass balance analysis measuring changes of the surface boundary between water and scCO2. We measured Berea sandstone and Tako sandstone, which were cored and shaped into a cylinder form. The mixed fluid of water and scCO2 was injected into a rock sample that was previously saturated with CO2-saturated water. The flow volumes of the water and scCO2 were measured for different saturation conditions by changing the mixing ratio of the fluids at the sample inlet. All measurements were made at 40&deg;C and 10 MPa, including those for the water-CO2 separator. The injection flow rate was 0.5 ml/min. By plotting the ratios of water and scCO2 of the inflow and outflow with respect to elapsed time, we can determine whether the flow is steady or unsteady. &emsp;The relative permeability curve is obtained by plotting the relative permeability values with respect to the degree of water saturation. The results for Berea sandstone suggest that the relationship between relative permeability and the relative saturation of water and scCO2 correspond well to those of the previous study. However, the results for Tako sandstone deviate from the predicted curve of the previous study. This is likely to be due to the heterogeneity of Tako sandstone.

    DOI： 10.5026/jgeography.120.944

  • Effects of pressure on pore characteristics and permeability of porous rocks as estimated from seismic wave velocities in cores from TCDP Hole-A Reviewed

    Keigo Kitamura, Miki Takahashi, Kazuo Mizoguchi, Koji Masuda, Hisao Ito, Sheng-Rong Song

    GEOPHYSICAL JOURNAL INTERNATIONAL   182 ( 3 )   1148 - 1160   2010.9

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    DOI： 10.1111/j.1365-246X.2010.04694.x

  • Effects of pressure on pore characteristics and permeability of porous rocks as estimated from seismic wave velocities in cores from TCDP Hole-A Reviewed

    Keigo Kitamura, Miki Takahashi, Kazuo Mizoguchi, Koji Masuda, Hisao Ito, Sheng Rong Song

    Geophysical Journal International   182 ( 3 )   1148 - 1160   2010.9

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    DOI： 10.1111/j.1365-246X.2010.04694.x

  • Detecting and monitoring CO<inf>2</inf> with P-wave velocity and resistivity from both laboratory and field scales Reviewed

    Z. Xue, J. Kim, S. Mito, K. Kitamura, T. Matsuoka

    SPE International Conference on CO2 Capture, Storage, and Utilization 2009   277 - 282   2009.12

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    Detecting and monitoring CO<inf>2</inf> with P-wave velocity and resistivity from both laboratory and field scales
    Sequestration of Carbon Dioxide (CO2) into saline aquifers has been proposed as one of the most practical options of all geological sequestration possibilities. When saline aquifers are to be used to sequester CO2 for long periods, it will be necessary to monitor the migration and diffusion of CO2 in those reservoirs. Monitoring of geological sequestration has been identified as one of the highest priority needs in several recent international conferences on greenhouse gas control technologies. Monitoring is necessary to confirm the containment of CO2, to assess leakage paths, and to gain understanding of interactions between CO 2, the rock-forming minerals, and formation fluids. Recently CO 2 monitoring has moved to next stage for the purpose of leakage detection and quantification of CO2 stored in reservoirs. What kinds of monitoring methods we could use and do the methods have sufficient resolution and detection levels need to be addressed urgently. Seismic surveys provide the most attractive approach for obtaining the spatial coverage required for mapping the location and movement of CO2 in the subsurface. However, from the first Japanese pilot project, time-lapse sonic logging results showed P-wave velocity becomes less sensitive when the CO2 saturation up to 20&#37;, while resistivity kept increasing with increase in CO2 saturation. This paper describes the results of P-wave velocity and resistivity measurements when injecting CO2 into water-saturated porous sandstones at laboratory and the results of comparison between P-wave velocity and resistivity changes obtained from both laboratory- and field-scales. Copyright 2009, Society of Petroleum Engineers.

  • Experimental study on seismic monitoring of residual supercritical CO2 in water-saturated porous sandstones Reviewed International journal

    Keigo Kitamura and Ziqiu Xue

    The 9th SEGJ International Symposium, Sapporo, Japan   2009.11

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    Language：Japanese   Publishing type：Research paper (international conference proceedings)  

  • Detecting and monitoring CO2 with P-wave velocity and resistivity from both laboratory and field scales

    Z. Xue, J. Kim, S. Mito, Keigo Kitamura, T. Matsuoka

    SPE International Conference on CO2 Capture, Storage, and Utilization 2009 SPE International Conference on CO2 Capture, Storage, and Utilization 2009   277 - 282   2009.10

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  • Case study: trapping mechanisms at the pilot-scale CO2 injection site, Nagaoka, Japan Reviewed

    Ziqiu Xue, Saeko Mito, Keigo Kitamura, Toshifumi Matsuoka

    GREENHOUSE GAS CONTROL TECHNOLOGIES 9   1 ( 1 )   2057 - 2062   2009.10

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    DOI： 10.1016/j.egypro.2009.01.268

  • Effects of clay content on the frictional strength and fluid transport property of faults Reviewed

    Miki Takahashi, Kazuo Mizoguchi, Keigo Kitamura, Koji Masuda

    Journal of Geophysical Research: Solid Earth   112 ( 8 )   2007.8

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    DOI： 10.1029/2006JB004678

  • Effects of clay content on the frictional strength and fluid transport property of faults Reviewed

    Miki Takahashi, Kazuo Mizoguchi, Keigo Kitamura, Koji Masuda

    Journal of Geophysical Research: Solid Earth   112 ( 8 )   2007.8

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    DOI： 10.1029/2006JB004678

  • Depth dependent strength of the fault gouge at the Atotsugawa fault, central Japan: A possible mechanism for its creeping motion Reviewed

    Kazuo Mizoguchi, Eiichi Fukuyama, Keigo Kitamura, Miki Takahashi, Koji Masuda, Kentaro Omura

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS   161 ( 1-2 )   115 - 125   2007.4

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    DOI： 10.1016/j.pepi.2007.01.003

  • Depth dependent strength of the fault gouge at the Atotsugawa fault, central Japan A possible mechanism for its creeping motion Reviewed

    Kazuo Mizoguchi, Eiichi Fukuyama, Keigo Kitamura, Miki Takahashi, Koji Masuda, Kentaro Omura

    Physics of the Earth and Planetary Interiors   161 ( 1-2 )   115 - 125   2007.4

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.pepi.2007.01.003

  • The influence of pore fluids on seismic wave velocities under high temperature and high pressure conditions: Development of a new technique with gas apparatus at AIST, Japan Reviewed

    Keigo Kitamura, Koji Masuda, Miki Takahashi, Osamu Nishizawa

    EARTH PLANETS AND SPACE   58 ( 11 )   1515 - 1518   2006.11

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1186/BF03352651

  • Constraint of lattice-preferred orientation (LPO) on Vp anisotropy of amphibole-rich rocks Reviewed

    K Kitamura

    GEOPHYSICAL JOURNAL INTERNATIONAL   165 ( 3 )   1058 - 1065   2006.6

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    DOI： 10.1111/j.1365-246X.2006.02961.x

  • Constraint of lattice preffered orientation (LPO) on Vp anisotropy of amphibole-rich rocks Reviewed International journal

    Keigo Kitamura

    Geophysical Journal International   165.0   1058.0 - 1065.0   2006.2

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1111/j.1365-246X.2006.02961.x

  • 高温高圧条件下での岩石の弾性波速度測定とその地質学的意義 Reviewed

    北村圭吾, 増田幸治

    地学雑誌   114 ( 6 )   963 - 974   2005.12

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    We review the methods of measuring the velocities of elastic-waves in rocks and summarize the temperature-dependence of elastic-wave velocities under high-temperature and high-pressure conditions. The elastic-wave velocities in rocks are strongly affected by several phenomena such as thermal cracking, phase transition of minerals, partial melting of rocks, and dehydration of hydrous minerals. These phenomena are strongly affected by pressure-temperature conditions and chemical compositions of rocks and minerals. Thus, it is very difficult to predict the elastic wave velocities of rocks and minerals under high-pressure and high-temperature conditions theoretically. Laboratory measurements of the velocities of elastic-waves in rocks under high-pressure and high-temperature conditions have provided useful data for estimating physical and geological properties in the crust and upper mantle. We also mention the next issues to be studied in relation to the velocity of elastic waves in rocks. It is important to measure elastic-wave velocities in rocks under high-temperature and high-pressure conditions in the presence of pore-fluids.

    DOI： 10.5026/jgeography.114.6_963

  • 高温高圧条件下での岩石の弾性波速度測定とその地質学的意義. Invited Reviewed

    北村圭吾・増田幸治

    地学雑誌   114   963 - 974   2005.6

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  • Petrological model of the northern Izu-Bonin-Mariana arc crust: constraints from high-pressure measurements of elastic wave velocities of the Tanzawa plutonic rocks, central Japan Reviewed

    K Kitamura, M Ishikawa, M Arima

    TECTONOPHYSICS   371 ( 1-4 )   213 - 221   2003.8

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    DOI： 10.1016/S0040-1951(03)00229-4

  • Petrological model of the northern Izu-Bonin-Mariana arc crust Constraints from high-pressure measurements of elastic wave velocities of the Tanzawa plutonic rocks, central Japan Reviewed

    Keigo Kitamura, M. Ishikawa, M. Arima

    Tectonophysics   371 ( 1-4 )   213 - 221   2003.8

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    DOI： 10.1016/S0040-1951(03)00229-4

  • Laboratory measurements of P-wave velocity of granulites from Lutzow-holm Complex, East Antarctica: Preliminary report Reviewed

    Kitamura, K, Ishikawa, M, Arima, M, Shiraishi, K

    Polar Geoscience   14, 180-194   2001.12

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    Laboratory measurements of P-wave velocity of granulites from Lutzow-holm Complex, East Antarctica: Preliminary report

  • Laboratory measurements of P-wave velocity of granulites from Lützow-Holm Complex, East Antarctica: Preliminary report. Reviewed International journal

    14   180 - 194   2001.3

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  • Rock velocities at atmospheric pressure and room temperature in Tanzawa plutonic rocks from central Japan. Reviewed International journal

    Keigo Kitamura. and Masahiro Ishikawa

    Memoirs of National Institute of Polar Research Spec. Issue, vol. 53,   53   192 - 202   1998.10

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  • Rock velocities at atmospheric pressure and room temperature in Tanzawa plutonic rocks from central Japan Reviewed

    Kitamura Keigo, Ishikawa Masahiro

    Memoirs of National Institute of Polar Research, Spec. Issue,   53   192 - 202   1998.3

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MISC

  • 難透過性岩石中における超臨界CO₂の透過挙動解明のための実験的検討

    今里 光紀, 三谷 泰浩, 池見 洋明, 本田 博之, 北村 圭吾

    岩盤力学に関するシンポジウム講演論文集 Proceedings of the Symposium on Rock Mechanics   2018.1

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    Language：Japanese  

  • 岩石の微細構造と物性:砂岩浸透率の封圧変化

    西澤修, 中島善人, 高橋美紀, 北村圭吾

    地質ニュース   2009.3

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    Language：Japanese  

  • 陸域震源断層深部すべり過程のモデル化 高温高圧実験による断層深部のすべり機構の研究

    増田幸治, 新井崇史, 高橋美紀, 重松紀生, 藤本光一郎, 北村圭吾

    月刊地球   2005.4

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  • 地球内部を覗く極域の窓―グローバル地震学における意義と展望―東南極リュツォ・ホルム岩体産高度変成岩のP波速度異方性

    北村圭吾

    月刊地球   2003.6

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  • 花こう岩研究の最前線 花こう岩成因論の新地平をめざして 2章 地殻の融解と花こう岩の生成 海洋性島弧地殻構造と花こう岩質マグマの起源

    有馬真, 石川正弘, 北村圭吾

    月刊地球   2000.9

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    Language：Japanese  

Professional Memberships

  • The Society of Exploration Geophysics

  • American Geophysical Union

  • Society of Exploration Geophysics of Japan

  • The Seismological Society of Japan

  • The Geological Society of Japan

  • The Geothermal Research Society of Japan

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Academic Activities

  • Screening of academic papers

    Role(s)： Peer review

    2017

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    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：3

Research Projects

  • 密度汎関数-分子動力学ハイブリッド計算による高温条件下の粘土鉱物の電気伝導度評価

    Grant number：1 9 K 0 3 9 9 6  2019 - 2021

    日本学術振興会  科学研究費助成事業  基盤研究(C)

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    Authorship：Principal investigator  Grant type：Scientific research funding

  • 密度汎関数-分子動力学ハイブリッド計算による高温条件下の粘土鉱物の電気伝導度評価

    Grant number：19K03996  2019 - 2021

    日本学術振興会  科学研究費助成事業  基盤研究(C)

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    Authorship：Principal investigator  Grant type：Scientific research funding

  • 超臨界地熱発電技術研究開発 /　超臨界地熱資源への調査井掘削に関する革新的技術開発/　ＡＩによる超臨界地熱資源評価・掘削技術

    2018.4 - 2021.3

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    Authorship：Coinvestigator(s) 

  • 超臨界地熱発電技術研究開発/超臨界地熱資源の評価と調査井仕様の詳細設計/東日本・九州地域における超臨界地熱資源有望地域の調査と抽熱可能量の推定

    2018.4 - 2021.3

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    Authorship：Coinvestigator(s) 

  • 地熱発電技術研究開発／地熱発電の導入拡大に資する革新的技術開発／天然・人工地熱システムを利用した超臨界地熱発電の発電量、経済性および安全性に関する詳細検討

    2017.8 - 2018.3

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    Authorship：Coinvestigator(s) 

  • 非構造性帯水層への炭酸ガス地中貯留実現のための研究

    Grant number：17H01291  2017 - 2021

    日本学術振興会  科学研究費助成事業  基盤研究(A)

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    Authorship：Coinvestigator(s)  Grant type：Scientific research funding

  • 地球規模課題対応国際科学協力事業「インドネシア東ジャワ州グンディガス田における二酸化炭素の地中貯留及びモニタリングに関する先導的研究」 International coauthorship

    2011.4 - 2016.3

    JICA/JST SATREPS プログラム 

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    Authorship：Coinvestigator(s) 

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