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Tatsuya Yokoyama
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Proceedings Papers

Evaluation of Rock Stresses Measured in a Long Water Tunnel at Deep Depth

Tatsuya Yokoyama, Akira Mito
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-059
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View Paper titled, Evaluation of Rock Stresses Measured in a Long Water Tunnel at Deep Depth
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Proceedings Papers

First Field Test of the Dual Core-Bit Tool for Drilling Stress Record Cores at Kamioka Mine, Japan

Kazuhiko Tezuka, Toshiya Yamamoto, Takatoshi Ito, Tatsuya Yokoyama, Akio Funato
Paper presented at the SPWLA 25th Formation Evaluation Symposium of Japan, September 25–26, 2019
Paper Number: SPWLA-JFES-2019-K
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View Paper titled, First Field Test of the Dual Core-Bit Tool for Drilling Stress Record Cores at Kamioka Mine, Japan
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Proceedings Papers

Changes in In-Situ Rock Stress Before and After the Major 2011 Tohoku-Oki Earthquake

Kiyotoshi Sakaguchi, Tatsuya Yokoyama
Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-098
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View Paper titled, Changes in In-Situ Rock Stress Before and After the Major 2011 Tohoku-Oki Earthquake
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Proceedings Papers

Re-Opening and Shut-in Behaviors under a Large Ratio of Principal Stresses in a Hydraulic Fracturing Test

Tatsuya Yokoyama, Kiyotoshi Sakaguchi, Takatoshi Ito
Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-109
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View Paper titled, Re-Opening and Shut-in Behaviors under a Large Ratio of Principal Stresses in a Hydraulic Fracturing Test
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Proceedings Papers

Periodic Measurement of In-Situ Rock Stress at Shallow Depth in the Vicinity of the Epicenter Before and After the 2011 Tohoku-Oki Earthquake

Kiyotoshi Sakaguchi, Motoki Egawa, Tatsuya Yokoyama
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-048
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View Paper titled, Periodic Measurement of In-Situ Rock Stress at Shallow Depth in the Vicinity of the Epicenter Before and After the 2011 Tohoku-Oki Earthquake
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Proceedings Papers

New Hydraulic Fracturing System for In-Situ Stress Measurement by Using High Stiffness Mechanism

Tatsuya Yokoyama, Koji Ogawa
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-053
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View Paper titled, New Hydraulic Fracturing System for In-Situ Stress Measurement by Using High Stiffness Mechanism
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Proceedings Papers

P-wave Velocity Monitoring during the Dissociation of Methane Hydrate Bearing Sand by using Giant Pressure Cell

Tatsuya Yokoyama, Makoto hoshino, Eiki Nakayama, Masaki Ono, Hideki Saito
Paper presented at the Eleventh Ocean Mining and Gas Hydrates Symposium, June 21–27, 2015
Paper Number: ISOPE-M-15-149
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View Paper titled, P-wave Velocity Monitoring during the Dissociation of Methane Hydrate Bearing Sand by using Giant Pressure Cell
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Proceedings Papers

Monitoring System for Seafloor Deformation during Methane Hydrate Production Test

Tatsuya Yokoyama, Mio Shimoyama, Shinji Matsuda, Koichi Tago, Junya Takeshima
Paper presented at the Tenth ISOPE Ocean Mining and Gas Hydrates Symposium, September 22–26, 2013
Paper Number: ISOPE-M-13-024
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View Paper titled, Monitoring System for Seafloor Deformation during Methane Hydrate Production Test
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Proceedings Papers

Monitoring System of Seafloor Subsidence for Methane Hydrate Production Test

Tatsuya Yokoyama, Mio Shimoyama, Shinji Matsuda, Koich Tago, Junya Takeshima, Yoshihiro Nakatsuka
Paper presented at the SPWLA 18th Formation Evaluation Symposium of Japan, September 27–28, 2012
Paper Number: SPWLA-JFES-2012-B
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View Paper titled, Monitoring System of Seafloor Subsidence for Methane Hydrate Production Test
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Proceedings Papers

SS - Gas Hydrate: Seismic wave velocities and electric resistivities of core samples containing methane hydrate

Hideki Saito, Eiki Nakayama, Tatsuya Yokoyama
Paper presented at the Offshore Technology Conference, May 3–6, 2010
Paper Number: OTC-20705-MS
https://doi.org/10.4043/20705-MS
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View Paper titled, SS - Gas Hydrate: Seismic wave velocities and electric resistivities of core samples containing methane hydrate
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Proceedings Papers

Seafloor Displacement Monitoring By Double Integral Technique Using Servo-accelerometer System

Tatsuya Yokoyama, Hideki Saito, Hiroshi Kameya, Shigekazu Uchiyama
Paper presented at the Seventh ISOPE Ocean Mining Symposium, July 1–6, 2007
Paper Number: ISOPE-M-07-020
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View Paper titled, Seafloor Displacement Monitoring By Double Integral Technique Using Servo-accelerometer System
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