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Tetsuro Hirono - One of the best experts on this subject based on the ideXlab platform.
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Profiles of volumetric water content in fault zones retrieved from hole B of the Taiwan Chelungpu‐fault Drilling Project (TCDP)
Geophysical Research Letters, 2008Co-Authors: Weiren Lin, Osamu Matsubayashi, Wataru Tanikawa, En-chao Yeh, Tetsuro Hirono, Wonn Soh, Chien-ying Wang, Sheng-rong Song, Masafumi MurayamaAbstract:[1] To determine the distribution pattern of water content in the three major fault zones penetrated by the Taiwan Chelungpu-fault Drilling Project (TCDP) hole B, and to assess a rapid, nondestructive water content measurement technique, time domain reflectometry (TDR), we determined the volumetric water content of sequential core samples and found that water content increased toward the center of each of the three fault zones, except in the disk-shaped black material. We observed distinct anomalies in the water content and resistivity profiles, particularly in the shallowest major fault zone (FZB1136), supporting the hypothesis that FZB1136 ruptured during the 1999 Chi-Chi earthquake. This study, the first successful application of the TDR technique to determine water content of core samples, including fault zone samples, collected by an active-fault Drilling Project, showed that this technique is suitable for measuring water content of fault core samples.
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nondestructive continuous physical property measurements of core samples recovered from hole b taiwan chelungpu fault Drilling Project
Journal of Geophysical Research, 2007Co-Authors: Osamu Matsubayashi, Weiren Lin, En-chao Yeh, Tetsuro Hirono, Wonn Soh, Hiroki Sone, Toshiaki Mishima, Yoshitaka Hashimoto, Kan AoikeAbstract:[1] The Taiwan Chelungpu-Fault Drilling Project was undertaken in 2002 to investigate the faulting mechanism of the 1999 Mw 7.6 Taiwan Chi-Chi earthquake. Hole B penetrated the Chelungpu fault, and core samples were recovered from between 948.42- and 1352.60-m depth. Three major zones, designated FZB1136 (fault zone at 1136-m depth in hole B), FZB1194, and FZB1243, were recognized in the core samples as active fault zones within the Chelungpu fault. Nondestructive continuous physical property measurements, conducted on all core samples, revealed that the three major fault zones were characterized by low gamma ray attenuation (GRA) densities and high magnetic susceptibilities. Extensive fracturing and cracks within the fault zones and/or loss of atoms with high atomic number, but not a measurement artifact, might have caused the low GRA densities, whereas the high magnetic susceptibility values might have resulted from the formation of magnetic minerals from paramagnetic minerals by frictional heating. Minor fault zones were characterized by low GRA densities and no change in magnetic susceptibility, and the latter may indicate that these minor zones experienced relatively low frictional heating. Magnetic susceptibility in a fault zone may be key to the determination that frictional heating occurred during an earthquake on the fault.
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Core description and characteristics of fault zones from Hole-A of the Taiwan Chelungpu-fault Drilling Project
Terrestrial Atmospheric and Oceanic Sciences, 2007Co-Authors: En-chao Yeh, Weiren Lin, Tetsuro Hirono, Sheng-rong Song, Hiroki Sone, Taichi Nakaya, Ka Hao Ian, Jih Hao Hung, Chien-ying WangAbstract:Taiwan Chelungpu-fault Drilling Project was conducted in drill site Dakeng, Taichung City of central western Taiwan during 2004 - 2005 principally to investigate the rupture mechanism in the northern segment of the Chi-Chi earthquake of 21 September 1999, and also to examine regional stratigraphy and tectonics. Core examination (500 - 1800 m) of Hole-A gave profound results aiding in illustrating the lithologic column, deformation structure, and architectural pattern of fault zones along the borehole
Yuhan Wang - One of the best experts on this subject based on the ideXlab platform.
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risk analysis in ultra deep scientific Drilling Project a fuzzy synthetic evaluation approach
International Journal of Project Management, 2013Co-Authors: Jialin Liu, Yuhan WangAbstract:Abstract Exploration of deep earth requires ultra deep Drilling attempts on the sea or continent, which is the main goal of scientific Drilling Projects currently established. Uncertain geological complexity, high requirement for R&D of critical equipment as well as high demand of practical performance has to be encountered during a scientific Drilling Project, making it full of challenge and risks. Risk management, therefore, is critically proposed for scientific Drilling Projects in order to reduce the risks. However, many traditional risk assessment methods may not perform well in the Project due to lack of high quality data of historical record and sufficient information. This paper, therefore, proposes a fuzzy synthetic evaluation approach for scientific Drilling Project risk assessment. Four criteria — probability, severity, non-detectability and worsening factor are utilized to evaluate individual and overall risks comprehensively. Linguistic terms instead of numerical values are employed to evaluate each risk normally done by experts. AHP/ANP is used to determine sensible weights of each criterion. Values of risk indices are calculated to represent the level of each risk and the overall risk. Finally, a case study on risk analysis of SinoProbe-09 Project conducted in Jilin University is tested to demonstrate the procedure of the method and to validate the proposed method. Results show that the risks of the scientific Drilling Project can be assessed effectively and efficiently.
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Risk analysis in ultra deep scientific Drilling Project — A fuzzy synthetic evaluation approach
International Journal of Project Management, 2013Co-Authors: Jialin Liu, Yuhan WangAbstract:Abstract Exploration of deep earth requires ultra deep Drilling attempts on the sea or continent, which is the main goal of scientific Drilling Projects currently established. Uncertain geological complexity, high requirement for R&D of critical equipment as well as high demand of practical performance has to be encountered during a scientific Drilling Project, making it full of challenge and risks. Risk management, therefore, is critically proposed for scientific Drilling Projects in order to reduce the risks. However, many traditional risk assessment methods may not perform well in the Project due to lack of high quality data of historical record and sufficient information. This paper, therefore, proposes a fuzzy synthetic evaluation approach for scientific Drilling Project risk assessment. Four criteria — probability, severity, non-detectability and worsening factor are utilized to evaluate individual and overall risks comprehensively. Linguistic terms instead of numerical values are employed to evaluate each risk normally done by experts. AHP/ANP is used to determine sensible weights of each criterion. Values of risk indices are calculated to represent the level of each risk and the overall risk. Finally, a case study on risk analysis of SinoProbe-09 Project conducted in Jilin University is tested to demonstrate the procedure of the method and to validate the proposed method. Results show that the risks of the scientific Drilling Project can be assessed effectively and efficiently.
Jialin Liu - One of the best experts on this subject based on the ideXlab platform.
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risk analysis in ultra deep scientific Drilling Project a fuzzy synthetic evaluation approach
International Journal of Project Management, 2013Co-Authors: Jialin Liu, Yuhan WangAbstract:Abstract Exploration of deep earth requires ultra deep Drilling attempts on the sea or continent, which is the main goal of scientific Drilling Projects currently established. Uncertain geological complexity, high requirement for R&D of critical equipment as well as high demand of practical performance has to be encountered during a scientific Drilling Project, making it full of challenge and risks. Risk management, therefore, is critically proposed for scientific Drilling Projects in order to reduce the risks. However, many traditional risk assessment methods may not perform well in the Project due to lack of high quality data of historical record and sufficient information. This paper, therefore, proposes a fuzzy synthetic evaluation approach for scientific Drilling Project risk assessment. Four criteria — probability, severity, non-detectability and worsening factor are utilized to evaluate individual and overall risks comprehensively. Linguistic terms instead of numerical values are employed to evaluate each risk normally done by experts. AHP/ANP is used to determine sensible weights of each criterion. Values of risk indices are calculated to represent the level of each risk and the overall risk. Finally, a case study on risk analysis of SinoProbe-09 Project conducted in Jilin University is tested to demonstrate the procedure of the method and to validate the proposed method. Results show that the risks of the scientific Drilling Project can be assessed effectively and efficiently.
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Risk analysis in ultra deep scientific Drilling Project — A fuzzy synthetic evaluation approach
International Journal of Project Management, 2013Co-Authors: Jialin Liu, Yuhan WangAbstract:Abstract Exploration of deep earth requires ultra deep Drilling attempts on the sea or continent, which is the main goal of scientific Drilling Projects currently established. Uncertain geological complexity, high requirement for R&D of critical equipment as well as high demand of practical performance has to be encountered during a scientific Drilling Project, making it full of challenge and risks. Risk management, therefore, is critically proposed for scientific Drilling Projects in order to reduce the risks. However, many traditional risk assessment methods may not perform well in the Project due to lack of high quality data of historical record and sufficient information. This paper, therefore, proposes a fuzzy synthetic evaluation approach for scientific Drilling Project risk assessment. Four criteria — probability, severity, non-detectability and worsening factor are utilized to evaluate individual and overall risks comprehensively. Linguistic terms instead of numerical values are employed to evaluate each risk normally done by experts. AHP/ANP is used to determine sensible weights of each criterion. Values of risk indices are calculated to represent the level of each risk and the overall risk. Finally, a case study on risk analysis of SinoProbe-09 Project conducted in Jilin University is tested to demonstrate the procedure of the method and to validate the proposed method. Results show that the risks of the scientific Drilling Project can be assessed effectively and efficiently.
Stephen H Hickman - One of the best experts on this subject based on the ideXlab platform.
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stress orientations of taiwan chelungpu fault Drilling Project tcdp hole a as observed from geophysical logs
Geophysical Research Letters, 2007Co-Authors: Hung Yu Wu, Jih Hao Hung, Mark D. Zoback, Naomi L Boness, Stephen H HickmanAbstract:[1] The Taiwan Chelungpu-fault Drilling Project (TCDP) drilled a 2-km-deep research borehole to investigate the structure and mechanics of the Chelungpu Fault that ruptured in the 1999 Mw 7.6 Chi-Chi earthquake. Geophysical logs of the TCDP were carried out over depths of 500–1900 m, including Dipole Sonic Imager (DSI) logs and Formation Micro Imager (FMI) logs in order to identify bedding planes, fractures and shear zones. From the continuous core obtained from the borehole, a shear zone at a depth of 1110 meters is interpreted to be the Chelungpu fault, located within the Chinshui Shale, which extends from 1013 to 1300 meters depth. Stress-induced borehole breakouts were observed over nearly the entire length of the wellbore. These data show an overall stress direction (N115E) that is essentially parallel to the regional stress field and parallel to the convergence direction of the Philippine Sea plate with respect to the Eurasian plate. Variability in the average stress direction is seen at various depths. In particular there is a major stress orientation anomaly in the vicinity of the Chelungpu fault. Abrupt stress rotations at depths of 1000 m and 1310 m are close to the Chinshui Shale’s upper and lower boundaries, suggesting the possibility that bedding plane slip occurred during the Chi-Chi earthquake. Citation: Wu, H.-Y., K.-F. Ma, M. Zoback, N. Boness, H. Ito, J.-H. Hung, and S. Hickman (2007), Stress orientations of Taiwan Chelungpu-Fault Drilling Project (TCDP) hole-A as observed from geophysical logs, Geophys. Res. Lett., 34, L01303, doi:10.1029/2006GL028050.
En-chao Yeh - One of the best experts on this subject based on the ideXlab platform.
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Profiles of volumetric water content in fault zones retrieved from hole B of the Taiwan Chelungpu‐fault Drilling Project (TCDP)
Geophysical Research Letters, 2008Co-Authors: Weiren Lin, Osamu Matsubayashi, Wataru Tanikawa, En-chao Yeh, Tetsuro Hirono, Wonn Soh, Chien-ying Wang, Sheng-rong Song, Masafumi MurayamaAbstract:[1] To determine the distribution pattern of water content in the three major fault zones penetrated by the Taiwan Chelungpu-fault Drilling Project (TCDP) hole B, and to assess a rapid, nondestructive water content measurement technique, time domain reflectometry (TDR), we determined the volumetric water content of sequential core samples and found that water content increased toward the center of each of the three fault zones, except in the disk-shaped black material. We observed distinct anomalies in the water content and resistivity profiles, particularly in the shallowest major fault zone (FZB1136), supporting the hypothesis that FZB1136 ruptured during the 1999 Chi-Chi earthquake. This study, the first successful application of the TDR technique to determine water content of core samples, including fault zone samples, collected by an active-fault Drilling Project, showed that this technique is suitable for measuring water content of fault core samples.
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nondestructive continuous physical property measurements of core samples recovered from hole b taiwan chelungpu fault Drilling Project
Journal of Geophysical Research, 2007Co-Authors: Osamu Matsubayashi, Weiren Lin, En-chao Yeh, Tetsuro Hirono, Wonn Soh, Hiroki Sone, Toshiaki Mishima, Yoshitaka Hashimoto, Kan AoikeAbstract:[1] The Taiwan Chelungpu-Fault Drilling Project was undertaken in 2002 to investigate the faulting mechanism of the 1999 Mw 7.6 Taiwan Chi-Chi earthquake. Hole B penetrated the Chelungpu fault, and core samples were recovered from between 948.42- and 1352.60-m depth. Three major zones, designated FZB1136 (fault zone at 1136-m depth in hole B), FZB1194, and FZB1243, were recognized in the core samples as active fault zones within the Chelungpu fault. Nondestructive continuous physical property measurements, conducted on all core samples, revealed that the three major fault zones were characterized by low gamma ray attenuation (GRA) densities and high magnetic susceptibilities. Extensive fracturing and cracks within the fault zones and/or loss of atoms with high atomic number, but not a measurement artifact, might have caused the low GRA densities, whereas the high magnetic susceptibility values might have resulted from the formation of magnetic minerals from paramagnetic minerals by frictional heating. Minor fault zones were characterized by low GRA densities and no change in magnetic susceptibility, and the latter may indicate that these minor zones experienced relatively low frictional heating. Magnetic susceptibility in a fault zone may be key to the determination that frictional heating occurred during an earthquake on the fault.
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Core description and characteristics of fault zones from Hole-A of the Taiwan Chelungpu-fault Drilling Project
Terrestrial Atmospheric and Oceanic Sciences, 2007Co-Authors: En-chao Yeh, Weiren Lin, Tetsuro Hirono, Sheng-rong Song, Hiroki Sone, Taichi Nakaya, Ka Hao Ian, Jih Hao Hung, Chien-ying WangAbstract:Taiwan Chelungpu-fault Drilling Project was conducted in drill site Dakeng, Taichung City of central western Taiwan during 2004 - 2005 principally to investigate the rupture mechanism in the northern segment of the Chi-Chi earthquake of 21 September 1999, and also to examine regional stratigraphy and tectonics. Core examination (500 - 1800 m) of Hole-A gave profound results aiding in illustrating the lithologic column, deformation structure, and architectural pattern of fault zones along the borehole
