BJARKASON ELVAR KARL

写真a

Affiliation

Graduate School of International Resource Sciences  Department of Earth Resource Engineering and Environmental Science 

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Research Interests 【 display / non-display 】

  • Geothermal energy

  • Geothermal energy

  • Linear algebra

  • Numerical simulation

  • Randomized algorithms

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Graduating School 【 display / non-display 】

  • 　
    -
    2011.06

    University of Iceland   School of Engineering and Natural Sciences, Faculty of Sciences   Physics   Graduated

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Graduate School 【 display / non-display 】

  • 　
    -
    2019.06

    The University of Auckland  Department of Engineering Science  Doctor's Course  Completed

  • 　
    -
    2014.06

    University of Iceland  School of Engineering and Natural Sciences, Faculty of Earth Sciences  Geophysics  Master's Course  Completed

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Degree 【 display / non-display 】

  • The University of Auckland -  PhD in Engineering Science

  • University of Iceland -  MS in Geophysics

  • University of Iceland -  BS in Physics

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Campus Career 【 display / non-display 】

  • 2022.04
    -
    Now

    Akita University   Graduate School of International Resource Sciences   Department of Earth Resource Engineering and Environmental Science   Assistant Professor  

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External Career 【 display / non-display 】

  • 2019.05
    -
    2022.03

    Tohoku University   Institute of Fluid Science   Postdoctoral Researcher  

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Academic Society Affiliations 【 display / non-display 】

  • 2022.08
    -
    Now
     

    Japan

     

    The Geothermal Research Society of Japan

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Research Areas 【 display / non-display 】

  • Natural Science / Applied mathematics and statistics

  • Energy Engineering / Earth resource engineering, Energy sciences

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Research Achievements 【 display / non-display 】

    ◆Original paper【 display / non-display 】

  • On the b-value dependency of injection-induced seismicity on geomechanical parameters

    Mukuhira, Y., Fehler, M.C., Bjarkason, E.K., Ito, T., Asanuma, H.

    International Journal of Rock Mechanics and Mining Sciences ( Elsevier BV )  174   105631   2024.02  [Refereed]

    Research paper (journal)   International Co-author

    DOI

  • Estimation of flow-channel structures with uncertainty quantification: Validation by 3D-printed fractures and field application

    Suzuki, A., Bjarkason, E.K., Yamaguchi, A., Hawkins, A.J., Hashida, T.

    Geothermics ( Elsevier BV )  105   102480   2022.06  [Refereed]

    Research paper (journal)   International Co-author

    DOI

  • Bayesian and Neural Network Approaches to Estimate Deep Temperature Distribution for Assessing a Supercritical Geothermal System: Evaluation Using a Numerical Model

    Ishitsuka, K., Kobayashi, Y., Watanabe, N., Yamaya, Y., Bjarkason, E.K., Suzuki, A., Mogi, T., Asanuma, H., Kajiwara, T., Sugimoto, T., Saito, R.

    Natural Resources Research ( Springer Science and Business Media LLC )  30 ( 5 ) 3289 - 3314   2021.06  [Refereed]

    Research paper (journal)   Domestic Co-author

    DOI

  • Incorporating posterior‐informed approximation errors into a hierarchical framework to facilitate out‐of‐the‐box MCMC sampling for geothermal inverse problems and uncertainty quantification

    Maclaren, O.J., Nicholson, R., Bjarkason, E.K., O'Sullivan, J.P., O'Sullivan, M.J.

    Water Resources Research   56 ( 1 ) 1 - 25   2020.01  [Refereed]

    Research paper (journal)  

    DOI

  • Pass-efficient randomized algorithms for low-rank matrix approximation using any number of views

    Bjarkason, E.K.

    SIAM Journal on Scientific Computing   41 ( 4 ) A2355 - A2383   2019.07  [Refereed]

    Research paper (journal)   Single author

    DOI

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    ◆International conference proceedings【 display / non-display 】

  • Preliminary evaluation of cesium tracer adsorption for geothermal applications: Implications for temperature decline predictions

    Bjarkason, E.K., Hawkins, A.J.

    Proceedings of International Symposium on Earth Science and Technology 2023     370 - 373   2023.11

    Research paper (international conference proceedings)   International Co-author

  • Experimental analysis of how the form of biodegradable resin drilling fluid additives affects filtration properties and lost circulation prevention performance

    Onuki, M, Bjarkason, E.K, Naganawa, S.

    Geothermal Resources Council Transactions   47   1104 - 1114   2023.10  [Refereed]

    Research paper (international conference proceedings)   Domestic Co-author

  • Modelling of geothermal cuttings transportation during drilling—A case study of well PW-03B in Paka geothermal field, Kenya

    Miyora, T., Bjarkason, E.K., Naganawa, S.

    Geothermal Resources Council Transactions   47   1045 - 1059   2023.10  [Refereed]

    Research paper (international conference proceedings)   Domestic Co-author

  • Optimization of drilling parameters for PDC bit drilling medium-to-hard formations

    Ishizawa, K., Bjarkason, E.K., Naganawa, S.

    Geothermal Resources Council Transactions   47   1019 - 1028   2023.10  [Refereed]

    Research paper (international conference proceedings)   Domestic Co-author

  • Thermal stress analysis considering casing eccentricity in a supercritical geothermal well

    Shimomura, R., Sugawara, H., Bjarkason, E.K., Naganawa, S.

    Geothermal Resources Council Transactions   47   3033 - 3042   2023.10  [Refereed]

    Research paper (international conference proceedings)   Domestic Co-author

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    ◆Research society, Symposium materials, etc.【 display / non-display 】

  • Thermal stress analysis of casing string in supercritical geothermal well drilling

    Journal of the Japanese Association for Petroleum Technology   88 ( 5 ) 429 - 430   2023.09  [Invited]

    Research paper (research society, symposium materials, etc.)   Domestic Co-author

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Presentations 【 display / non-display 】

  • Preliminary evaluation of cesium tracer adsorption for geothermal applications: Implications for temperature decline predictions

    Bjarkason, E.K., Hawkins, A.J.

    International Symposium on Earth Science and Technology 2023  2023.11  -  2023.12 

  • Evaluation of casing and cement integrity in supercritical geothermal well using finite element method

    Annual Meeting of the Geothermal Research Society of Japan  2023.11  -  2023.11 

  • Effect of bottomhole mud pressure on PDC bit drilling performance investigated using discrete element simulations

    Annual Meeting of the Geothermal Research Society of Japan  2023.11  -  2023.11 

  • Evaluating wellbore cooling effect with insulated drill pipes in supercritical geothermal well drilling

    Annual Meeting of the Geothermal Research Society of Japan  2023.11  -  2023.11 

  • Evaluation of cutting behavior of PDC bits in medium-hard rock

    Annual Meeting of the Geothermal Research Society of Japan  2023.11  -  2023.11 

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