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タイトル: | Acoustic emission monitoring of hydraulic fracturing laboratory experiment with supercritical and liquid CO₂ |
著者: | Ishida, Tsuyoshi Aoyagi, Kazuhei Niwa, Tomoya Chen, Youqing https://orcid.org/0000-0002-4555-0239 (unconfirmed) Murata, Sumihiko https://orcid.org/0000-0003-1877-9537 (unconfirmed) Chen, Qu Nakayama, Yoshiki |
著者名の別形: | 石田, 毅 陳, 友晴 |
キーワード: | acoustic emission carbon dioxide fluid viscosity granite hydraulic fracturing |
発行日: | 28-Aug-2012 |
出版者: | American Geophysical Union |
誌名: | Geophysical Research Letters |
巻: | 39 |
号: | 16 |
論文番号: | L16309 |
抄録: | Carbon dioxide (CO₂) is often used for enhanced oil recovery in depleted petroleum reservoirs, and its behavior in rock is also of interest in CO₂ capture and storage projects. CO₂ usually becomes supercritical (SC-CO₂) at depths greater than 1, 000 m, while it is liquid (L-CO₂) at low temperatures. The viscosity of L-CO₂ is one order lower than that of normal liquid water, and that of SC-CO₂ is much lower still. To clarify fracture behavior induced with injection of the low viscosity fluids, we conducted hydraulic fracturing experiments using 17 cm cubic granite blocks. The AE sources with the SC- and L-CO₂ injections tend to distribute in a larger area than those with water injection, and furthermore, SC-CO₂ tended to generate cracks extending more three dimensionally rather than along a flat plane than L-CO₂. It was also found that the breakdown pressures for SC- and L-CO₂ injections are expected to be considerably lower than for water. |
著作権等: | ©2012. American Geophysical Union The full-text file will be made open to the public on 28 February 2013 in accordance with publisher's 'Terms and Conditions for Self-Archiving'. |
URI: | http://hdl.handle.net/2433/160101 |
DOI(出版社版): | 10.1029/2012GL052788 |
出現コレクション: | 学術雑誌掲載論文等 |
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