Optimization of Drilling Fluid Circulation System in Superhot Enhanced Geothermal Drilling with Fluid Loss and Gas Kick

• Project/Area Number: 26420842
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Earth system and resources engineering
• Research Institution: Akita University (2017); The University of Tokyo (2014-2016)
• Principal Investigator: Naganawa Shigemi 秋田大学, 国際資源学研究科, 教授 (10237539)
• Research Collaborator: Nurul Aimi Ghazali 東京大学, 大学院工学系研究科
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 地熱開発 / EGS / 掘削 / 逸泥 / ガスキック / 泥水循環 / 超臨界地熱開発

Outline of Final Research Achievements

The purpose of this study is to develop and propose a new concept of drilling fluid circulation system that enables to adequately control both lost circulation and gas kick simultaneously occurring for safe superhot geothermal drilling on the basis of the managed pressure drilling technology. A model to estimate the loss rate was developed by use of a traditional fracture model and it was combined with a transient wellbore flow simulator. Drilling a model well that represented a simultaneous lost circulation and gas kick situation was simulated to evaluate the proposed new concept managed pressure drilling method. Also, fundamental study on development of a new deflocculant for drilling fluid in high temperature conditions.

Research Products

• [Journal Article] Simulation Study on Influences of Wellbore Tortuosity on Hole Cleaning in Extended-Reach Drilling (2017)
  • Author(s): Naganawa Shigemi、Kudo Hiroyasu、Matsubuchi Hitoshi
  • Journal Title: SPE Drilling & Completion Volume: 32 Issue: 04 Pages: 277-289
  • DOI: 10.2118/183409-pa
  • Peer Reviewed
• [Journal Article] Changes in ultra-deep and ultra-high-temperature drilling projects and associated technology development (2017)
  • Author(s): 長縄 成実
  • Journal Title: Journal of the Japanese Association for Petroleum Technology Volume: 82 Issue: 5 Pages: 324-331
  • DOI: 10.3720/japt.82.324
  • NAID: 130007649778
  • ISSN: 0370-9868, 1881-4131
  • Peer Reviewed
• [Journal Article] Cuttings Transport Simulation Combined With Large-Scale Flow Loop Experimental Results and LWD Data for Hole Cleaning Evaluation in Extended-Reach Drilling (2017)
  • Author(s): Shigemi Naganawa, Ryosuke Sato and Masaki Ishikawa
  • Journal Title: SPE Drilling & Completion Volume: 印刷中 Issue: 03 Pages: 194-207
  • DOI: 10.2118/171740-pa
  • Peer Reviewed
• [Presentation] Feasibility Study of Tannin-Lignosulfonate Drilling Fluid System for Drilling Geothermal Prospect (2018)
  • Author(s): Ghazali, N. A., Naganawa, S. and Masuda, Y.
  • Organizer: Workshop on Geothermal Reservoir Engineering
  • Int'l Joint Research
• [Presentation] Eco-Friendly Drilling Fluid Deflocculant for Drilling High Temperature Well: A Review (2018)
  • Author(s): Ghazali, N. A., Naganawa, S., Masuda, Y., Ibrahim, W. A. and Bakar, N. F. A.
  • Organizer: International Conference on Ocean, Offshore & Arctic Engineering (OMAE 2018)
  • Int'l Joint Research / Invited
• [Presentation] Current Status of Research and Development on Supercritical Geothermal Resources in Japan (2018)
  • Author(s): Asanuma, H., Mogi, T., Tsuchiya, N., Watanabe, N., Naganawa, S., Ogawa, Y., Fujimitsu, Y., Kajiwara, T., Osato, K., Shimada, K., Horimoto, S., Sato, T., Ito, T., Yamada, S., Kondo, S., Watanabe, K., Gotoh, Y., Okada, H., Yoshida, Y., Nagasawa, Y. and Koyama, A.
  • Organizer: Grand Renewable Energy 2018 International Conference and Exhibition
  • Int'l Joint Research
• [Presentation] Development of Modified Rhizophora spp. Tannin Biopolymer Additive in Drilling Fluid System for High Temperature Well Applications (2018)
  • Author(s): Ghazali, N. A., Naganawa, S. and Masuda, Y.
  • Organizer: IADC/SPE Asia Pacific Drilling Technology Conference
  • Int'l Joint Research
• [Presentation] Status of Japanese Supercritical Geothermal Project as of FY2017 (2018)
  • Author(s): Asanuma, H., Mogi, T., Tsuchiya, N., Watanabe, N., Naganawa, S., Ogawa, Y., Fujimitsu, Y., Kajiwara, T., Osato, K., Shimada, K., Horimoto, S., Sato, T., Ito, T., Yamada, S., Watanabe, K., Gotoh, Y., Nagasawa, Y. and Koyama, A.
  • Organizer: Geothermal Resources Council Annual Meeting
  • Int'l Joint Research
• [Presentation] Innovative Drilling Technology for Supercritical Geothermal Resources Development (2017)
  • Author(s): Shigemi Naganawa, Noriyoshi Tsuchiya, Takashi Okabe, Tatsuya Kajiwara, Kuniaki Shimada and Norio Yanagisawa
  • Organizer: 42nd Workshop on Geothermal Reservoir Engineering
  • Place of Presentation: Stanford, California
  • Year and Date: 2017-02-13
  • Int'l Joint Research
• [Presentation] Simulation Study on Influences of Wellbore Tortuosity on Hole Cleaning in Extended-Reach Drilling (2016)
  • Author(s): Shigemi Naganawa, Hiroyasu Kudo and Hitoshi Matsubuchi
  • Organizer: Abu Dhabi International Petroleum Exhibition and Conference (ADIPEC)
  • Place of Presentation: Abu Dhabi, UAE
  • Year and Date: 2016-11-07
  • Int'l Joint Research
• [Presentation] Drilling Technology Development for Supercritical Geothermal Resources in Japan (2016)
  • Author(s): Shigemi Naganawa
  • Organizer: IEA Central and South American Workshop on Geothermal Energy
  • Place of Presentation: Cuernavaca, Mexico
  • Year and Date: 2016-04-18
  • Int'l Joint Research / Invited
• [Presentation] 地熱井掘削におけるPDCビットの使用について (2015)
  • Author(s): 長縄成実
  • Organizer: 日本地熱学会学術講演会
  • Place of Presentation: 大分県別府市、別府国際コンベンションセンターB-ConPlaza
  • Year and Date: 2015-10-21
• [Presentation] Optimum Hydraulics Design and Operation for Extended-Reach and Horizontal Geothermal Drilling (2015)
  • Author(s): Shigemi Naganawa
  • Organizer: World Geothermal Congress 2015
  • Place of Presentation: Melbourne, Australia
  • Year and Date: 2015-04-19
  • Int'l Joint Research
• [Presentation] Survey on Effective and Feasible Emerging Technologies for EGS Well Drilling (2015)
  • Author(s): Shigemi Naganawa
  • Organizer: 40th Workshop on Geothermal Reservoir Engineering
  • Place of Presentation: Stanford, California (USA)
  • Year and Date: 2015-01-26 – 2015-01-28
• [Presentation] 地熱井掘削技術の現状と最新動向 (2014)
  • Author(s): 長縄成実
  • Organizer: 日本地熱学会学術講演会
  • Place of Presentation: 弘前大学（青森県弘前市）
  • Year and Date: 2014-10-29 – 2014-10-31