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Investigation of hydraulic fracture propagation using a post-peak control system coupled with acoustic emission

Chen, Li-Hsien, Chen, Wei-Chih, Chen, Yao-Chung, Benyamin, Leo and Li, An-Jui 2015, Investigation of hydraulic fracture propagation using a post-peak control system coupled with acoustic emission, Rock mechanics and rock engineering, vol. 18, no. 3, pp. 1233-1248, doi: 10.1007/s00603-014-0620-y.

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Title Investigation of hydraulic fracture propagation using a post-peak control system coupled with acoustic emission
Author(s) Chen, Li-Hsien
Chen, Wei-Chih
Chen, Yao-Chung
Benyamin, Leo
Li, An-Jui
Journal name Rock mechanics and rock engineering
Volume number 18
Issue number 3
Start page 1233
End page 1248
Total pages 16
Publisher Springer
Place of publication Berlin, Germany
Publication date 2015-05
ISSN 0723-2632
1434-453X
Keyword(s) CO2 storage
Crack growth
Tensile strength
Underground injection
Summary This study investigates the fracture mechanism of fluid coupled with a solid resulting from hydraulic fracture. A new loading machine was designed to improve upon conventional laboratory hydraulic fracture testing and to provide a means of better understanding fracture behavior of solid media. Test specimens were made of cement mortar. An extensometer and acoustic emission (AE) monitoring system recorded the circumferential deformation and crack growth location/number during the test. To control the crack growth at the post-peak stage the input fluid rate can be adjusted automatically according to feedback from the extensometer. The complete stress-deformation curve, including pre- and post-peak stages, was therefore obtained. The crack extension/growth developed intensively after the applied stress reached the breakdown pressure. The number of cracks recorded by the AE monitoring system was in good agreement with the amount of deformation (expansion) recorded by the extensometer. The results obtained in this paper provide a better understanding of the hydraulic fracture mechanism which is useful for underground injection projects. © 2014 Springer-Verlag Wien.
Language eng
DOI 10.1007/s00603-014-0620-y
Field of Research 090501 Civil Geotechnical Engineering
Socio Economic Objective 870199 Construction Planning not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
HERDC collection year 2014
Copyright notice ©2015, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30071536

Document type: Journal Article
Collection: School of Engineering
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