Small scale in situ experiments to inject supercritical and liquid carbon dioxide into rock mass
| Project/Area Number |
25249131
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Earth system and resources engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
直井 誠 京都大学, 工学(系)研究科(研究院), 助教 (10734618)
陳 友晴 京都大学, エネルギー科学研究科, 助教 (80293926)
奈良 禎太 京都大学, 工学(系)研究科(研究院), 助教 (00466442)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥44,720,000 (Direct Cost: ¥34,400,000、Indirect Cost: ¥10,320,000)
Fiscal Year 2016: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
Fiscal Year 2015: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
Fiscal Year 2014: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
Fiscal Year 2013: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
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| Keywords | 二酸化炭素排出削減 / 資源開発工学 / 水圧破砕 / 岩盤 / 破壊 / Acoustic Emission / 微小地震 / 地殻・マントル物質 / 岩盤工学 |
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| Outline of Final Research Achievements |
In the underground sequestration of CO2 (carbon dioxide), large amount of CO2 is injected into rock mass. Since CO2 becomes supercritical state in the deep underground and it is very slick, it is necessary to access effect of the injection on stability of surrounding rock mass. In our study, we injected CO2 into a hole drilled around 10 m long from the floor of a tunnel in a mountain with monitoring of AE (Acoustic Emission: elastic wave radiated with rock fracturing). The results indicated that the AE sources with the CO2 injection distributed larger than those with the water injection. However, with time elapsing after the CO2 injection, AE events that seemed to be caused by crack closing started to be observed. Since these AE events are most likely associated with degassing in the cracks without rock fracturing, it seems that they never bring instability to the surrounding rock mass even if they distribute large.
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Report
(5 results)
Research Products
(14 results)
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[Journal Article] Features of CO2 fracturing deduced from acoustic emission and microscopy in laboratory experiments2016
Author(s)
Ishida, T., Chen, Y., Bennour, Z., Yamashita, H., Inui, S., Nagaya, Y., Naoi, M., Chen, Q., Nakayama, Y. and Nagano, Y.
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Journal Title
J. Geophys. Res. Solid Earth
Volume: 121
Issue: 11
Pages: 8080-8098
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Presentation] Evaluation of Stimulated Reservoir Volume Using the Fluorescence Method in Hydraulic Fracturing of Shale Cores2016
Author(s)
Bennour, Z., Watanabe¬¬¬, S., Chen, Y., Ishida, T. and Akai, T.
Organizer
International Conference on Geomechanics, Geo-energy and Geo-resources
Place of Presentation
Monash Univ. Melbourne, Ausralia
Year and Date
2016-09-28
Related Report
Int'l Joint Research
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