东北大学学报（自然科学版）

东北大学学报（自然科学版） ›› 2013, Vol. 34 ›› Issue (11): 1638-1641.DOI: 10.12068/j.issn.1005-3026.2013.11.028

• 资源与土木工程 • 上一篇    下一篇

射孔角度对水力压裂裂纹扩展影响数值模拟

门晓溪1，唐春安2，韩志辉3，马天辉2   

  1. (1东北大学资源与土木工程学院，辽宁沈阳110819；2大连理工大学土木水利学院，辽宁大连116024；3中冶焦耐(大连)工程技术有限公司，辽宁 大连116085)
  • 发布日期:2013-07-09
  • 通讯作者: 门晓溪
  • 作者简介:门晓溪(1985-)，女，内蒙古赤峰人，东北大学博士研究生；唐春安(1958-)，男，湖南黔阳人，大连理工大学教授，博士生导师.
  • 基金资助:
    国家重点基础研究发展计划项目(2011CB013503).

Numerical Simulation to Influence of Perforation Angle on Fracture Propagation Under Hydraulic Fracturing

MEN Xiaoxi1， TANG Chunan2， HAN Zhihui3， MA Tianhui2   

  1. 1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China; 2. School of Hydraulic Engineering， Dalian University of Technology， Dalian 116024， China; 3. ACRE Coking and Refractory Engineering Consulting Corporation，MCC，Dalian 116085，China.
  • Published:2013-07-09
  • Contact: MEN Xiaoxi
  • About author:-
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摘要： 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.

关键词: 非均匀性, 射孔角度, 裂纹扩展, 水压致裂, 数值模拟

Abstract: Hydraulic fracturing process of the heterogeneity rockmass under different perforation angles was simulated using the RFPA2D20Flow. Considering the heterogeneous characteristics of rock in a mesoscale， a seepagestressfailure coupling model was created based on the finite element calculation method. The simulation results show that the maximum principal stress controls the fracture propagation direction no matter how perforation angle changes. With the increase of the perforation angle， a turning fracture becomes more obvious and the turning distance bigger. The best perforation angle area is from 0° to 30°. The numerically simulated results were in agreement with the experimental results.

Key words: heterogeneity, perforation angle, fracture evolution, hydraulic fracturing, numerical simulation

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