Numerical simulation of flow fields and permeability evolution in real fractures under continuous loading stress

LIANG Yunpei; ZHANG Huaijun; WANG Lichun; QIN Chaozhong; TIAN Jian; CHEN Qiang; SHI Bowen

doi:10.13809/j.cnki.cn32-1825/te.2023.06.015

English Version Reader LoginJournal Login

您当前的位置：

首页 >

文章列表页 >

Numerical simulation of flow fields and permeability evolution in real fractures under continuous loading stress

更新时间：2025-12-05

- Numerical simulation of flow fields and permeability evolution in real fractures under continuous loading stress
- Petroleum Reservoir Evaluation and Development Vol. 13, Issue 6, Pages: 834-843(2023)
- 作者机构：
  
  1. 重庆大学煤矿灾害动力学与控制全国重点实验室，重庆 400044重庆大学资源与安全学院,重庆,400044
  2. 重庆大学资源与安全学院，重庆 400044天津大学表层地球系统科学研究院,天津,300072
  3. 天津大学表层地球系统科学研究院,天津,300072
- 作者简介：
- 基金信息：
- DOI：10.13809/j.cnki.cn32-1825/te.2023.06.015
  CLC： TE377
- Published：2023
- 稿件说明：
移动端阅览
LIANG Yunpei, ZHANG Huaijun, WANG Lichun, et al. Numerical simulation of flow fields and permeability evolution in real fractures under continuous loading stress[J]. Petroleum Reservoir Evaluation and Development, 2023, 13(6): 834-843.
DOI：

LIANG Yunpei, ZHANG Huaijun, WANG Lichun, et al. Numerical simulation of flow fields and permeability evolution in real fractures under continuous loading stress[J]. Petroleum Reservoir Evaluation and Development, 2023, 13(6): 834-843. DOI： 10.13809/j.cnki.cn32-1825/te.2023.06.015.

摘要

采用数值随机生成的裂缝研究有效应力作用下裂缝导流能力变化忽视了真实裂缝开度非均质性的影响。研究采用巴西劈裂法对不同种类岩石造缝获取真实裂缝样品，使用三维光学扫描仪提取真实裂缝形貌特征及裂缝开度信息，建立接触力学模型和单相渗流模型，开展了有效应力连续加载下的裂缝流场和渗透率演化行为数值研究，并分析了传统的经验公式对真实裂缝案例的适应性。结果表明：①巴西劈裂的25 mm×50 mm真实裂缝在原始开度、表面粗糙度等微观结构上具有非均质性强特征，与直接通过数值生成的达到平均化尺度的裂缝存在明显不同；②由于非均质性的影响，不同岩石裂缝在有效应力加载过程中的裂缝开度、接触面积和空间相关长度在

方向和

方向上的演化行为有显著区别，且对渗透率变化的控制机理不同；③采用传统的经验公式拟合裂缝应力敏感渗透率演化时，拟合程度随着裂缝样品的非均质性增加而出现偏差增大。研究认为，传统经验公式在研究达到平均化尺度的裂缝时具有较好的应用基础，但针对非均质性强或整体未能满足平均化裂缝的应用受限。

Abstract

In the study of fracture conductivity evolution under stress using direct numerically generated fracture models

a key issue is the neglect of the real fracture's heterogeneous microstructure. To address this

the Brazilian splitting method is used to create fractures in various types of rocks. A 3D optical topography scanner then captures the actual fracture morphology and aperture information. This data forms the basis for establishing a contact mechanics model and a single-phase seepage model

which are used to study the evolution of the fracture flow field and permeability under continuous str

ess loading. The study also evaluates the applicability of traditional empirical formulas to real fracture cases. The findings are significant: ① The 25 mm×50 mm real fracture in Brazilian splitting shows obvious heterogeneity in the microstructure of the original aperture and surface roughness

which is obviously different from the fracture that reaches the average scale directly generated by numerical method. ② In the process of stress loading

the fracture aperture

contact area and spatial correlation length show different evolution characteristics in the

direction and

direction due to the fracture heterogeneity

and the control mechanism of permeability change is different; ③ When the traditional empirical formula is used to fit the stress-sensitive permeability evolution of fracture

the deviation of the fitting degree increases with the increase of the heterogeneity of fracture samples. This study suggested that the traditional empirical formula has a good application basis in the study of the fracture reaching the averaging scale

but it is limited in the application of the fracture with strong heterogeneity or failure to meet the averaging scale.

关键词

Keywords

references

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Atmospheric diffusion study of surface leakage from CO₂ enhanced oil recovery with carbon capture and storage based on flux monitoring-CFD simulation

Optimization of huff-n-puff in shale oil horizontal wells based on EDFM

Simulation of reasonable shut-in time for shale oil after volume fracturing

Huff-n-puff technology and parameter optimization of large displacement water injection in tight oil reservoir

Research and application of well location deployment parameters for cluster development of medium-deep hydrothermal geothermal resources: A case study of HTC geothermal field

Related Author

QU Changqing

LIN Qianguo

CAO Xiaopeng

LIU Haicheng

LI Zhongxin

CHEN Xianchao

JIANG Pengyu

FAN Hao

Related Institution

School of Mechanical Engineering, Shanghai Jiao Tong University

Research Institute of Carbon Neutrality, Shanghai Jiao Tong University

College of Smart Energy, Shanghai Jiao Tong University

College of Energy, Chengdu University of Technology

School of Geosciences, China University of Petroleum（East China）

AI问答

⁰