Measurement in the earth's crust environment

Numbering Code G-ENG01 7F085 LE77
G-ENG02 7F085 LE77
Year/Term 2021 ・ First semester
Number of Credits 2 Course Type Lecture
Target Year Target Student
Language English Day/Period Wed.3
Instructor name FUKUYAMA EIICHI (Graduate School of Engineering Professor)
NARA YOSHITAKA (Graduate School of Engineering Associate Professor)
YAMAMOTO KOJI (Part-time Lecturer)
Outline and Purpose of the Course The theories and measurement methodologies required for various engineering projects in the Earth's crust are explained. In this course, we explain them related to the geological disposal of radioactive wastes, the carbon capture and storage, and the extractions of oil and gas. Especially, we explain the characteristics and measurement methods of mechanical properties of rock and their applications to the engineering projects. Then we give lectures on the measurement methodology and novel information related to the various engineering projects in the Earth's crust.
Course Goals The goal of this course is to understand various measurement methods conducted for rock materials in the Earth’s crust environment. Specifically, we hope that students understand the methods to obtain the rock mechanical properties (strength, fracturing, permeability, etc.) and their importance. In addition, the understanding of the monitoring methods of mechanical behaviors for fluids, heat, and rock mass related to various engineering projects in the Earth's crust.
Schedule and Contents ・Topic 1: Measurement of mechanical properties of rock under various environment
(Class number of times: 5)
Description: At first, various engineering projects in the Earth's crust are introduced. Then, the measurement methodologies of mechanical properties (strength, fracturing, permeability, etc.) of rock under different environmental conditions and their importance are described. In addition, the relationships between mechanical properties of rock and engineering projects in the Earth's crust, especially the radioactive waste disposal and the carbon capture and storage, are described.

・Topic 2: Rock Friction and Induced Seismicity: Generation and Monitoring
(Class number of times: 5)
Description: Induced seismicity is one of the unstable factors during the development of natural resources in the earth's crust. Induced seismicity is controlled by the preexisting crack geometry, effective stress field including pore pressure, and static and dynamic friction of rocks. In this course, the measurement techniques of these physical quantities will be overviewed. Then, we discuss how to mitigate the damages from induced seismicity by monitoring these quantities.

・Topic 3: Effect of rock stress on oil and gas exploration
(Class number of times: 4)
Description: Estimation of rock stress condition by hydraulic fracturing and logging, which is conducted at various steps for oil and gas exploration, will be explained. Importance of rock stress affecting on borehole stability will be explained as well.

・Topic 5: Confirmation of understanding
(Class number of times: 1)
Description: The confirmation of understanding will be done by the feedback through tests.
Evaluation Methods and Policy Grading will be made by the scores of reports and achievement tests (60%), and the class activity (40%).
Course Requirements It will be better to complete “Engineering Geology” and “Rock Engineering” in the undergraduate course.
Study outside of Class (preparation and review) Some reports will be required to check the understanding of the contents of classes.
Textbooks Textbooks/References None. Handouts will be given in classes when needed.
References, etc. 1) Amadei, B. & Stephansson, O.: Rock Stress and Its Measurements, Capman & Hall, 1977.
2) Vutukuri, V. S. & Katsuyama, K.: Introduction to Rock Mechanics, Industrial Publishing & Consulting, Inc., Tokyo, 1994.
3) Paterson, M.S. & Wong, T-F.: Experimental Rock Deformation – The Brittle Field, Springer, 2005.
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