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Open AccessArticle

Effects of the Notch Angle, Notch Length and Injection Rate on Hydraulic Fracturing under True Triaxial Stress: An Experimental Study

1
State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
2
Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China
3
School of Port and Transportation Engineering, Zhejiang Ocean University, Zhoushan 316022, China
*
Authors to whom correspondence should be addressed.
Water 2018, 10(6), 801; https://doi.org/10.3390/w10060801
Received: 13 May 2018 / Revised: 15 June 2018 / Accepted: 15 June 2018 / Published: 17 June 2018
This study focused on the effects of the notch angle, notch length, and injection rate on hydraulic fracturing. True triaxial hydraulic fracturing experiments were conducted with 300 × 300 × 300 mm cement mortar blocks. The test results showed that the fracture initiation pressure decreased as the notch length and injection rate increased, whereas, the fracture initiation pressure decreased as the notch angle decreased. Furthermore, the direction of the hydraulic fracture was always along the direction of the maximum principle stress. View Full-Text
Keywords: hydraulic fracture; notch angle; notch length; injection rate; triaxial stress hydraulic fracture; notch angle; notch length; injection rate; triaxial stress
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Chen, Y.; Meng, Q.; Zhang, J. Effects of the Notch Angle, Notch Length and Injection Rate on Hydraulic Fracturing under True Triaxial Stress: An Experimental Study. Water 2018, 10, 801.

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