Features of CO2 fracturing deduced from acoustic emission and microscopy in laboratory experiments

Ishida, T.; Chen, Y.; Bennour, Ziad; Yamashita, H.; Inui, S.; Nagaya, Y.; Naoi, M.; Chen, Q.; Nakayama, Y.; Nagano, Y.

doi:10.1002/2016JB013365

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Open access

Authors

Ishida, T.

Chen, Y.

Bennour, Ziad

Yamashita, H.

Inui, S.

Nagaya, Y.

Naoi, M.

Chen, Q.

Nakayama, Y.

Nagano, Y.

Date

2016

Type

Journal Article

Metadata

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Citation

Ishida, T. and Chen, Y. and Bennour, Z. and Yamashita, H. and Inui, S. and Nagaya, Y. and Naoi, M. et al. 2016. Features of CO2 fracturing deduced from acoustic emission and microscopy in laboratory experiments. Journal of Geophysical Research: Solid Earth. 121 (11): pp. 8080-8098.

Source Title

Journal of Geophysical Research: Solid Earth

DOI

10.1002/2016JB013365

ISSN

2169-9313

Faculty

Curtin International

School

Curtin International

Remarks

URI

http://hdl.handle.net/20.500.11937/81165

Collection

Curtin Research Publications

Abstract

©2016. American Geophysical Union. All Rights Reserved. We conducted hydraulic fracturing (HF) experiments on 170 mm cubic granite specimens with a 20 mm diameter central hole to investigate how fluid viscosity affects HF process and crack properties. In experiments using supercritical carbon dioxide (SC-CO2), liquid carbon dioxide (L-CO2), water, and viscous oil with viscosity of 0.051–336.6 mPa · s, we compared the results for breakdown pressure, the distribution and fracturing mechanism of acoustic emission, and the microstructure of induced cracks revealed by using an acrylic resin containing a fluorescent compound. Fracturing with low-viscosity fluid induced three-dimensionally sinuous cracks with many secondary branches, which seem to be desirable pathways for enhanced geothermal system, shale gas recovery, and other processes.