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Geological modeling of CO2 reservoir heterogeneity based on Deep Learning Networks

Research Project

Project/Area Number 20K05396
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 31020:Earth resource engineering, Energy sciences-related
Research InstitutionAkita University

Principal Investigator

Chiyonobu Shun  秋田大学, 国際資源学研究科, 教授 (40526430)

Co-Investigator(Kenkyū-buntansha) 間所 洋和  岩手県立大学, ソフトウェア情報学部, 准教授 (10373218)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordsCCS / 二酸化炭素地下貯留 / 地質不均質性 / セマンティックセグメンテーション / 深層学習 / 砂岩泥岩互層 / 砂岩不均質性 / 貯留岩性状 / CNN / GAN / 地質モデル / 貯留層 / 堆積相解析 / 機械学習 / 二酸化炭素貯留層 / 砂岩 / ドローン / 画像解析 / 地層不均質性 / 露頭画像
Outline of Research at the Start

深刻度を増す地球温暖化に対して,CO2を地下貯留するCCS(二酸化炭素の回収・地下貯蔵)は緊急避難的かつ現実的な対策であるが,CO2の地下での挙動予測・貯留量算出へ向けた地下の地質モデルの不確実性がリスクとして指摘されてきた。
本研究では,ドローンによる露頭の高解像度デジタル画像と地質学的調査から得られる地層の試験値を組み合わせて,深層学習による信頼性の高いCO2貯留層の数値モデルを構築する。最終的には,この数値モデルでCO2貯留予測計算を行い,CCSの実現性を高めて地球温暖化対策への貢献を目指す。

Outline of Final Research Achievements

Carbon capture and storage (CCS) is an epoch-making approach to reduce greenhouse gases in the atmosphere. This study specifically examines outcrops because geological layer measurements can lead to production of a highly accurate geological model for feasible CCS inspections. Using a digital monocular RGB camera, we obtained outcrop images annotated with four classes along with strata. Subsequently, we compared segmentation accuracies with changing input image sizes of three types and semantic segmentation methods of four backbones. Experimentally obtained results demonstrated that data expansion with random sampling improved the accuracy. Regarding evaluation metrics, global accuracy and local accuracy are higher than the mean intersection over union (mIoU) for our outcrop image dataset with unequal numbers of pixels in the respective classes. These experimentally obtained results revealed that resizing for input images is unnecessary for our method.

Academic Significance and Societal Importance of the Research Achievements

地質が複雑な堆積盆を対象としたCCSのモデル構築へ向けて,実際の露頭から得られた地質学的情報を,セマンティックセグメンテーション技術を用いて数値化することができた.これは,今後本格化するCCS事業において,CO2貯留量の算定や,地下挙動予測計算において精度向上となることが確実である.また,事業化に向けた地下地質の不均質性に依存した地質リスクの顕在化にも寄与することになる.これらCCSにおける貯留層の基礎的データの公表は,事業が本格化しつつある現在は社会的意義が大きいと言える.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (7 results)

All 2022 2021 2020 Other

All Int'l Joint Research (2 results) Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (2 results)

  • [Int'l Joint Research] University of Calgary(カナダ)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] University of Calgary(カナダ)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Semantic Segmentation of Agricultural Images Based on Style Transfer Using Conditional and Unconditional Generative Adversarial Networks2022

    • Author(s)
      Madokoro H., Takahashi K., Yamamoto S., Nix S., Chiyonobu S., Saruta K., Saito K., Nishimura, Y., and Sato K.
    • Journal Title

      Applied Sciences

      Volume: 12 Issue: 15 Pages: 7785-7785

    • DOI

      10.3390/app12157785

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 秋田県男鹿半島における女川層の岩相と水圧破砕実験の関連性2021

    • Author(s)
      千代延俊・北村重弘・竹内傳・Martizzi P.・阿部史孝・有馬雄太郎
    • Journal Title

      石油技術協会誌

      Volume: 86 Pages: 483-491

    • NAID

      40022796810

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The hydrocarbon potential of the Miocene siliceous formations in Tsugaru Basin, northern Japan, based on the geochemical analysis2021

    • Author(s)
      Martizzi Paolo, Chiyonobu Shun, Arato Hiroyuki
    • Journal Title

      Journal of the Japanese Association for Petroleum Technology

      Volume: 86 Pages: 205-212

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 秋田県男鹿半島に分布する砂岩シルト岩互層の不均質性評価2021

    • Author(s)
      千代延俊・阿部史孝・佐藤宏大・間所洋和
    • Organizer
      石油技術協会
    • Related Report
      2020 Research-status Report
  • [Presentation] CCSのための露頭画像セグメンテーション2020

    • Author(s)
      佐藤宏大・間所洋和・千代延俊・永吉武志・Nix Stephanie・佐藤和人
    • Organizer
      電子情報通信学会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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