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On the initiation, propagation and reorientation of simultaneously-induced multiple hydraulic fractures
Abstract This study aims to uncover the growth characteristics of simultaneously-induced multiple hydraulic fractures using the discrete element method. We evaluate the influences of in-situ states and operational parameters on the fracture trajectories. Results reveal that reservoir heterogeneity magnifies the stress-shadowing effect and causes severe interactions among fractures. Higher effective stress anisotropy offsets the stress-shadowing effect and force the fractures to propagate in the direction of maximum stress and results in relative long parallel fractures. Increasing the spacing can mitigate the stress-shadowing effect to some degree. Injection rate and fluid viscosity have a less significant influence on the interactions among fractures.
On the initiation, propagation and reorientation of simultaneously-induced multiple hydraulic fractures
Abstract This study aims to uncover the growth characteristics of simultaneously-induced multiple hydraulic fractures using the discrete element method. We evaluate the influences of in-situ states and operational parameters on the fracture trajectories. Results reveal that reservoir heterogeneity magnifies the stress-shadowing effect and causes severe interactions among fractures. Higher effective stress anisotropy offsets the stress-shadowing effect and force the fractures to propagate in the direction of maximum stress and results in relative long parallel fractures. Increasing the spacing can mitigate the stress-shadowing effect to some degree. Injection rate and fluid viscosity have a less significant influence on the interactions among fractures.
On the initiation, propagation and reorientation of simultaneously-induced multiple hydraulic fractures
Duan, Kang (author) / Kwok, Chung Yee (author) / Zhang, Qiangyong (author) / Shang, Junlong (author)
2019-08-26
Article (Journal)
Electronic Resource
English
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