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

Q4 Chemical Engineering

Applied and Computational Mechanics Pub Date : 2021-10-01 DOI:10.22055/JACM.2021.37475.3022

Hai-chao Zhou, Huixing Gao, C. Feng, Zizheng Sun

引用次数: 2

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.

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裂隙煤层水力裂隙扩展的连续-非连续元模拟

利用水力压裂技术在具有天然裂缝的煤层中建立新的裂缝网络是煤层气开采的有效方法。本文提出了一种用于模拟和评估煤层水力裂缝扩展的连续不连续单元法。提出了一种弹性损伤破裂模型，用于捕捉破裂煤的变形和破裂过程。采用应力-裂缝渗流关系来模拟水力-机械耦合过程。详细分析了X向角度、力学强度、天然裂缝的距离和长度对裂缝的影响。研究结果对优化压裂设计具有潜在的实用价值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied and Computational Mechanics Engineering-Computational Mechanics

CiteScore

0.80

自引率

0.00%

发文量

审稿时长

14 weeks

期刊介绍： The ACM journal covers a broad spectrum of topics in all fields of applied and computational mechanics with special emphasis on mathematical modelling and numerical simulations with experimental support, if relevant. Our audience is the international scientific community, academics as well as engineers interested in such disciplines. Original research papers falling into the following areas are considered for possible publication: solid mechanics, mechanics of materials, thermodynamics, biomechanics and mechanobiology, fluid-structure interaction, dynamics of multibody systems, mechatronics, vibrations and waves, reliability and durability of structures, structural damage and fracture mechanics, heterogenous media and multiscale problems, structural mechanics, experimental methods in mechanics. This list is neither exhaustive nor fixed.