Numerical simulation of rock hydraulic fracturing based on peridynamics 
and quantitative analysis of fracture network

HUA Tao; SHEN Lin-fang; WANG Zhi-liang; LI Ze; XU Ze-min

doi:10.16285/j.rsm.2023.0252

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Numerical simulation of rock hydraulic fracturing based on peridynamics and quantitative analysis of fracture network

更新时间：2026-06-25

- Numerical simulation of rock hydraulic fracturing based on peridynamics and quantitative analysis of fracture network
- Vol. 45, Issue 2, Pages: 612-622(2024)
- 作者机构：
  
  昆明理工大学建筑工程学院,云南,昆明,650500
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2023.0252
  CLC： TU45
- Online First：07 February 2024，
  
  Published：2024
- 稿件说明：
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HUA Tao, SHEN Lin-fang, WANG Zhi-liang, et al. Numerical simulation of rock hydraulic fracturing based on peridynamics and quantitative analysis of fracture network[J]. 2024, 45(2): 612-622.
DOI：

HUA Tao, SHEN Lin-fang, WANG Zhi-liang, et al. Numerical simulation of rock hydraulic fracturing based on peridynamics and quantitative analysis of fracture network[J]. 2024, 45(2): 612-622. DOI： 10.16285/j.rsm.2023.0252.

摘要

基于常规态型近场动力学方法实现了岩石裂隙扩展演化，采用实时追踪新生裂隙面并施加表面压力的方法来模拟压裂液与裂隙表面的相互作用，建立了岩石水力压裂的数值计算模型。根据数字图像处理技术将Zhang-Suen细化算法应用于水力裂隙网络的骨架提取，并采用统计方法计算裂隙网络形态参数，提出了水力裂隙网络量化计算方法。最后考虑加载速率、地应力条件及弹性模量等因素影响，研究了水力裂隙扩展过程及裂隙网络形态参数的演化。研究结果表明：当加载速率较小时，主裂隙朝着较大地应力的方向扩展，裂隙分支并不明显；增加加载速率会增大裂隙均宽和裂隙密度，能够促进裂隙的张开程度及裂隙数量，增强裂隙网络的复杂程度并提高其渗透能力。当水平向地应力和竖向地应力相同时，主裂隙呈十字交叉分布；随着竖向地应力的增大，水平裂隙受到抑制作用，主裂隙沿着竖向扩展，而裂隙总长和裂隙密度则呈增加的趋势。岩体弹性模量的增加会减少细小裂隙分支的扩展，使裂隙网络形态趋于简单化。

Abstract

In this study

the rock fracture propagation is simulated based on the ordinary state-based peridynamics

and a numerical model of rock hydraulic fracturing is proposed by means of real-time tracking of newly generated fracture and applying pressure to simulating the interaction between fracturing fluid and fracture surface. According to the digital image processing technology

the Zhang-Suen thinning algorithm is applied to extracting the skeleton of hydraulic fracture network

and a quantitative method of hydraulic fracture network is presented by using the statistical method to calculate the morphological parameters. Finally

the process of hydraulic fracture propagation and the evolution of fracture network morphological parameters are studied considering the effects of loading rate

in situ stress condition and elastic modulus. The results show that when the loading rate is small

the main fracture expands towards the direction of the larger in situ stress

and the fracture branch is not obvious. Increasing the loading rate can increase the average width and density of fractures

promote the opening degree and number of fractures

enhance the complexity of fracture network

and improve its permeability. When the horizontal and vertical in situ stresses are the same

the major fractures intersect. With the increase of vertical in situ stress

the horizontal fractures are restrained

the major fracture propagates along the vertical direction

and the total length and density of fractures increase. The increase of elastic modulus of rock mass can reduce the propagation of fracture branches and simplify the fracture network.

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