地熱学会2019@熊本にて最近の研究成果を発表しました。

注水による断層すべりの発生機構に関するシミュレーション横山佳祐, 椋平祐輔, 伊藤高敏 日本地熱学会令和元年学術講演会（熊本大会） 2019年11月22日 

 地殻応力情報を用いた微小地震の断層面解範囲絞り込み椋平祐輔, 直井 誠, Michael C. Fehler, 森谷祐一, 伊藤高敏, 浅沼 宏, Markus Häring 日本地熱学会 令和元年学術講演会（熊本大会） 2019年11月22日 

We have Dr. Xiaodong Ma in our lab as an academic guest from ETH Zurich for collaborative study and participation of ICFD2019.
This invitation is supported by Collaborative Research Project of the Institute of Fluid Science, Tohoku University.

We had several oral and poster presentations at ICFD 2019. Also we invited Dr. Xiaodong Ma from ETH Zurich and he presented the our collaborative research progress.

CRF-4: Application of Core-based Inversion to Reconstruct Stress Field in an Underground Geoscience Laboratory
X. Ma, Y. Mukuhira, T. Ito

CRF-5: Validation of Fracture Permeability Estimated by Integrated Approach of Microseismic Observations and Reservoir Engineering Modeling
M. Yang, Y. Mukuhira, J. H. Norbeck, J. L. Rubinstein

CRF-R3: Link Between Tracer and Microseismic Analysis to Comprehensive Understanding of Hydraulic Feature of Fractured Geothermal Reservoir
A. Suzuki, Y. Mukuhira, R. N. Horne, A. Abe, A. J. Howkins, T. Ishibashi, P. K. Kang

http://www.ifs.tohoku.ac.jp/icfd2019/

USTCのDr. Baoshan Wangに研究室にご来訪頂き，下記の通りセミナーを実施します。Dr.Wagn氏とは今年のJpGUで知り合い，中国での石油資源開発に関わる研究を熱心にされています。

流体研 地下セミナー/特別講演会のお知らせ
2019/7/29 Mon 16:30-17:30 @流体科学研究所 2号館大講義室（東）

Migration of micro-earthquakes during cyclic operation of Underground Gas Storage and the Changdao earthquake swarm

Dr. Baoshan Wang (School of Earth and Space Sciences, University of Science and Technology of China) 
Abstract: The distribution of earthquakes is controlled by the stress state and material properties. And the migration of earthquakes can be used to infer the changes in subsurface stress or medium properties. In this presentation, we will introduce two case studies of seismicity migrations related respectively to the Hutubi Underground Gas Storage (UGS) in Junggar Basin and the Changdao earthquake swarm occurred in the Bohai Sea. We first use the matched and filter technique to detect more events than the local catalog. And then we relocate the detected events using double difference method with waveform cross-correlation-based differential travel-times. Micro-earthquakes clearly migrate outward from the UGS during the cyclic operation, the migration may result from the stress transfer during multiple injection and extraction. The seismicity during Changdao earthquake swarm unilaterally migrated south-west accompanied by some bursts along several conjugate faults. We suggest that fluid diffusions are responsible for the earthquake migration in Changdao.

第5回東北大学若手研究者アンサンブルワークショップにおいて，優秀ポスター賞を受賞（2019年６月７日）しました。本賞は，2019年6月7日に行われた第5回東北大学若手研究者アンサンブルワークショップにおいて，多数の研究者の興味を引きつける発表を対象とし，参加者の投票により決定されるものです。
受賞題目：地下の逆問題解決に対するチート的アプローチ（椋平　祐輔）

Our paper (Mukuhira et al., 2017 JGR) is honored as paper award from Japanese society for rock mechanics (JSRM).
Thank you for your support on our research activity. Also we sincerly appreciate Prof. Ishida (ex Kyoto Univ.) for recommendation.

Our collaborative research proposals have been accepted by ifs, Tohoku Univ.
Thanks for warm support! We will be in pursuit of collaborative project.

• FY2019: Collaborative Research Project 2019, Institute of Fluid Science, Tohoku University
  JPY 397k/y (PI)
  Project title: Estimation of fracture permeability by integrating microseismic observational data and reservoir engineering modeling.
  Project partner: Dr. Justin Rubinstein (USGS), Dr. Jack Norbeck (UCB) 
• FY2019: Collaborative Research Project 2019, Institute of Fluid Science, Tohoku University
  JPY 374k/y (co-PI)
  Project title: Application of core-based inversion to reconstruct stress field in an underground geoscience laboratory. Project partner: Dr. Xiadong Ma (ETH Zurich)

We had several oral and poster presentations including invited talk at JpGU meeting 2019.

Sun. May 26, 2019 1:45 PM – 2:00 PM
[SSS05-01] Causality between induced seismicity b-value reduction and stress state of existing fractures
★Invited Papers
*Yusuke Mukuhira¹, Michael C Fehler², Takatoshi Ito¹, Hiroshi Asanuma³, Markus O Häring⁴

Sun. May 26, 2019 3:30 PM – 5:00 PM
[SSS04-P01] Constraint of focal mechanisms of induced seismicity by using misfit angles based on known in-situ stress
*Yusuke Mukuhira¹, Makoto Naoi², Michael C Fehler³, Hirokazu Moriya⁵, Takatoshi Ito¹, Hiroshi Asanuma⁴, Markus O Häring⁶

Sun. May 26, 2019 10:45 AM – 12:15 PM
[SSS05-P04] A Novel Method to Estimate Fracture Permeability: Combining microseismic observational data and reservoir engineering model
*Meihua Yang^1,2, Yusuke Mukuhira², Takatoshi Ito²

Mon. May 27, 2019 3:30 PM – 5:00 PM
[MIS02-P07] ICDP DSeis 4: Drilling, core logging, and in-hole geophysical logging of ICDP DSeis drilling into the M5.5 aftershock zones in a South African gold mines.
*Shunsuke YOSHIDA¹, Tadokoro Ryogo¹, Kosuke Sugimura¹, Kanematsu Makoto¹, Mitsuya Higashi¹, Benni Liebenberg², Esterhuizen van Heerden², Stephen Tau³, Siyanda Mngadi³, Ray Durrheim³, Martin Ziegler⁴, Yusuke Mukuhira⁵, Ronald Conze⁶, Yasuo Yabe⁷, Shunya Kaneki⁸, Yuki Yokoyama⁹, Nomqhele Nkosi¹⁰, Dave Roberts¹⁰, Sifiso Buccio¹¹, Hiroshi Ogasawara¹

第22回　表面探傷シンポジウム　「表面探傷技術による健全性診断，品質検査」で，特別講演を行います。
平成31年3月18日(月)，19日(火)
東北大学　流体科学研究所　２号間5回第講義室
3月19日10:30~11:20 特別講演
椋平 祐輔　東北大学
「坑井を通した人工注水によってき裂が発生する弾性波を用いた地下深部き裂構造の評価」

http://www.jsndi.jp/sciences/section/index3-3.html

 After Davos induced seismicity workshop at Davos, I stopped at ETH and gave a talk about Mukuhira et al., 2018 (GJI). 

Speaker:Yusuke Mukuhira, Assistant Professor of Tohoku University, Institute of Fluid Science
Time: 2-3:30pm,March 11th, 2019
Room: NO F47
Title: Constraining of Focal Mechanisms of Induced Seismicity Using Borehole Logging Information