NDLI: A Laboratory Study of the Effects of Interbeds on Hydraulic Fracture Propagation in Shale Formation

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Correction: Juan, A.A.; Mendez, C.A.; Faulin, J.; de Armas, J.; Grasman, S.E. Electric Vehicles in Logistics and Transportation: A Survey on Emerging Environmental, Strategic, and Operational Challenges. Energies 2016, 9, 86

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A Laboratory Study of the Effects of Interbeds on Hydraulic Fracture Propagation in Shale Formation

Content Provider	MDPI
Author	Zhao, Zhiheng Li, Xiao Wang, Yu Zheng, Bo Zhang, Bo
Abstract	To investigate how the characteristics of interbeds affect hydraulic fracture propagation in the continental shale formation, a series of 300 mm × 300 mm × 300 mm concrete blocks with varying interbeds, based on outcrop observation and core measurement of Chang 7-2 shale formation, were prepared to conduct the hydraulic fracturing experiments. The results reveal that the breakdown pressure increases with the rise of thickness and strength of interbeds under the same in-situ field stress and injection rate. In addition, for the model blocks with thick and high strength interbeds, the hydraulic fracture has difficulty crossing the interbeds and is prone to divert along the bedding faces, and the fracturing effectiveness is not good. However, for the model blocks with thin and low strength interbeds, more long branches are generated along the main fracture, which is beneficial to the formation of the fracture network. What is more, combining the macroscopic descriptions with microscopic observations, the blocks with thinner and lower strength interbeds tend to generate more micro-fractures, and the width of the fractures is relatively larger on the main fracture planes. Based on the experiments, it is indicated that the propagation of hydraulic fractures is strongly influenced by the characteristics of interbeds, and the results are instructive to the understanding and evaluation of the fracability in the continental shale formation.
File Size	5803008
File Format	PDF
e-ISSN	19961073
DOI	10.3390/en9070556
Journal	Energies
Issue Number	7
Volume Number	9
Language	English
Publisher Date	2016-07-19
Access Restriction	Open
Subject Keyword	hydraulic fracturing interbeds fracture propagation failure mechanism
Content Type	Text
Resource Type	Article

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