Japan Geoscience Union Meeting 2018

Presentation information

[EE] Evening Poster

S (Solid Earth Sciences) » S-IT Science of the Earth's Interior & Tectonophysics

[S-IT26] Stress geomechanics integrations: Observations, Modelings and Implications (OMI)

Sun. May 20, 2018 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:HungYu Wu(Japan Agency for Marine-Earth Science and Technology), Weiren Lin(Graduate School of Engineering, Kyoto University), Yoshinori Sanada((国研)海洋研究開発機構, 共同), Chung-Han Chan(Earth Observatory of Singapore, Nanyang Technological University)

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

*HungYu Wu1, En-Chao Yeh2 (1.Japan Agency for Marine-Earth Science and Technology, 2.Department of Earth Sciences, National Taiwan Normal University)

Keywords: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.