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Simulation of Hydraulic Fracture Propagation in Fractured Coal ‎Seams with Continuum-discontinuum Elements

Publish place: Journal of Applied and Computational Mechanics، Vol: 7، Issue: 4
Publish Year: 1400
نوع سند: مقاله ژورنالی
زبان: English
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لینک ثابت به این Paper:
https://civilica.com/doc/1287477

شناسه ملی سند علمی:

JR_JACM-7-4_028

تاریخ نمایه سازی: 18 مهر 1400

Abstract:

Creating new fracture networks in coal seams with natural fractures through hydraulic fracturing techniques is an effective method for exploiting coal-bed methane. In this paper, a continuum-discontinuum element method (CDEM) is developed for simulating and assessing hydraulic fracture propagation in coal seams. An elastic-damage-fracture model is proposed for capturing the deformation and cracking processes of fractured coal. A stress-fracture percolation relation is implemented to simulate the hydro-mechanical coupling processes. The influence of X-direction angles, mechanical strengths, distances and lengths of natural fractures are analyzed in detail. The results are potentially useful to optimize the fracturing design.

Keywords:

Continuum-discontinuum element method (CDEM) , Hydraulic fracturing , Fractured coal , Hydro-mechanical coupling

Authors

Haifeng Zhou

College of Energy Engineering, Xian University of Science and Technology, Yata Road ۵۸, Xian, ۷۱۰۰۵۴, China‎

Hui Gao

School of Civil and Transportation Engineering, Hebei University of Technology, Xiping Road ۵۳۴۰, Tianjin, ۳۰۰۴۰۱, China‎

Chun Feng

Institute of Mechanics, Chinese Academy of Sciences, ۱۵ Beishihuan Xi Lu, Haidian District, Beijing, ۱۰۰۱۹۰, China‎

Zizheng Sun

School of Qilu Transportation, Shandong University, Jingshi Road ۱۷۹۲۳, Jinan, ۲۵۰۰۶۱, China‎

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