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Paper Publications

Title of Paper:射孔角度对水力压裂裂纹扩展影响数值模拟

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Date of Publication:2013-11-15

Journal:东北大学学报(自然科学版)

Included Journals:PKU、ISTIC、CSCD、Scopus

Volume:34

Issue:11

Page Number:1638-1641

ISSN No.:1005-3026

Key Words:非均匀性;射孔角度;裂纹扩展;水压致裂;数值模拟

Abstract:应用真实破裂过程分析系统RFPA2D2.0渗流版本,从细观力学角度出发,以赋予材料非均匀性为特点,采用有限元计算方法,通过创建渗流-应力-损伤耦合模型,模拟分析了不同射孔角度条件下的非均质岩体在孔隙水压力作用下的水压致裂过程.模拟分析结果表明,无论射孔角度如何变化,裂纹的发展方向始终趋向最大主应力方向;随着射孔角度的增加,逐渐形成双翼型转向裂纹,射孔方位角越大,裂纹的转向越明显,转向距离越大;0°~30°为最佳射孔方位角.数值模拟结果与实验结果相一致.

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