| Project/Area Number |
11694117
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
資源開発工学
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
NIITSUMA Hiroaki Graduate School of Engineering, Tohoku University, Professor, 大学院・工学研究科, 教授 (90108473)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
MORIYA Hirokazu Graduate School of Engineering, Tohoku University, Research Associate, 大学院・工学研究科, 助手 (60261591)
ASANUMA Hiroshi Graduate School of Engineering, Tohoku University, Associate Professor, 大学院・工学研究科, 助教授 (50250717)
|
|---|
| Project Period (FY) |
1999 – 2001
|
| Project Status |
Completed (Fiscal Year 2001)
|
| Budget Amount *help |
¥4,700,000 (Direct Cost: ¥4,700,000)
Fiscal Year 2001: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2000: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1999: ¥2,000,000 (Direct Cost: ¥2,000,000)
|
|---|
| Keywords | Geothermal / HDR / HWR / AE / MS / mapping / doublet / multiplet analysis / Collapsing / seismic efficiency / hydrofrac / 既存弱面のすべり / 国際研究者交流 / アメリカ / 人工地熱貯留層 / 岩石破壊力学 / ダブレット法 |
|---|
| Research Abstract |
Geothermal energy is one of the most potential energy source in future, because it is widely distributed on the earth, safe, clean and environmentally friendly to the earth. Engineered geothermal systems, which includes hot dry rock (HDR), hot wet rock (HWR) and enhanced geothermal systems (EGS), are promising for electrical power generation in future. However, behavior of reservoirs associated with hydraulic fracturing has not been clearly understood, and hence this brings uncertainty/risk in the development of engineered geothermal systems. In this project, microseismic techniques for delineation of structures inside the microseismic cloud was investigated, then informations from microseismicity was combined with geological information and rock mechanics to interpret/understand physics in the reservoir. Major results from this project are,
1. Data sets collected at Soutls, Fenton-Hill, Rosemanowes, Ogachi, and Hijiori were re-analyzed by super-resolution mapping techniques. Location and orientation of microscopic seismic structures were estimated and their behavior (slip, stress conditions etc.) were also estimated. Variation of super-resolution mapping techniques was investigated to reduce uncertainty/error in mapping.
2. Relationship between seismic activity and geological information including location and orientation of preexisting fracture was investigated by tests in laboratory simulating a shear slip of fracture in granite.
|
