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Upscaling of fractured rock using digital rock physics

Research Project

Project/Area Number 18K14169
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 31020:Earth resource engineering, Energy sciences-related
Research InstitutionKyushu University

Principal Investigator

Ikeda Tatsunori  九州大学, 工学研究院, 助教 (00736845)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywordsデジタル岩石物理学 / 数値シミュレーション / アップスケール / フラクチャー / クラック / 異方性 / デジタル岩石物理
Outline of Final Research Achievements

In this study, we developed a method to upscale elastic characteristics of heterogeneous rock samples including fracture (or crack) using digital rock physics. As a result, we can model whole rock samples as anisotropic media considering the crack aspect ratio and heterogeneity within rock samples. Although a further constraint is required to define parameters in our modeling, our approach has a potential to model heterogeneous rock samples reflecting heterogeneity as anisotropy.

Academic Significance and Societal Importance of the Research Achievements

従来の岩石物理学に基づく理論的な手法では、フラクチャーなどの不均質性の強い岩石サンプルをモデル化することが困難である。そこで本研究では、X線CTスキャナによりデジタル化した岩石を利用し、岩石内の不均質性やクラック形状を考慮できるモデル化手法を開発した。この手法により地熱貯留層になりうるフラクチャーやクラックなどを含む不均質な岩石をモデル化することで、貯留層特性を精度よく把握することに役立てることができる可能性がある。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (4 results)

All 2021 2019 2018

All Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] Estimation of Permeability and Water Saturation from the Resistivity and Elastic Wave Velocity: Insight from Laboratory Experiment and Digital Fracture Simulation2021

    • Author(s)
      K. Sawayama, F. Jiang, T. Ikeda, T. Ishibashi, T. Tsuji, Y. Fujimitsu, and H. Asanuma
    • Organizer
      World Geothermal Congress 2020
    • Related Report
      2019 Annual Research Report
  • [Presentation] デジタル岩石物理学による岩石の不均質性を考慮した弾性的特性のモデル化2019

    • Author(s)
      池田逹紀、辻健
    • Organizer
      物理探査学会第141回学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Numerical experiments of elastic wave propagation through digitalized fractures under various aperture and saturation conditions2018

    • Author(s)
      K. Sawayama, T. Ikeda, T. Tsuji, and Y. Fujimitsu
    • Organizer
      International Symposium on Earth Science and Technology 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] デジタル岩石亀裂を用いた比抵抗及び弾性波速度に対する水飽和の影響の解明2018

    • Author(s)
      澤山和貴、池田逹紀、藤光康宏
    • Organizer
      日本地熱学会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2021-02-19  

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