日本地球惑星科学連合2018年大会

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[EE] ポスター発表

セッション記号 S (固体地球科学) » S-IT 地球内部科学・地球惑星テクトニクス

[S-IT26] 地殻応力研究の最前線：観測・実験・モデリングの統合

2018年5月20日(日) 13:45 〜 15:15 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:呉 泓昱(海洋研究開発機構)、林 為人(京都大学大学院工学研究科)、真田 佳典(（国研）海洋研究開発機構、共同)、Chan Chung-Han(Earth Observatory of Singapore, Nanyang Technological University)

[SIT26-P05] The stress analysis in geothermal drilling project: example in I-Lan, North-East Taiwan

*呉 泓昱1、Yeh En-Chao2 (1.海洋研究開発機構、2.Department of Earth Sciences, National Taiwan Normal University)

キーワード：Stress status、Tensile fractures、Geothermal

From 2015, Taiwan Geothermal Drilling Projects invested by National Energy Program-Phase II drilled two experiential boreholes to reach the geothermal reservoir in I-Lan, North-East Taiwan. This reach is focusing on the stress orientation and magnitude estimation in the deep section of HCL-2 by analyzing the Formation MicroImager (FMI) images and physical properties. This geomechanical model we proposed that the significant tensile fractures observed from 1400~2800 meters and point out the maximum horizontal principal stress is 30 degrees direction from North. The stress field in this borehole stays in the normal faulting stress regime to strike-slip regime depend on the local structure varieties.