Hydraulic fracturing model based on the discrete fracture model and the generalized J integral

International Conference on Water Resource and Environment 2016

地球科学;生态环境科学

Liu, Z.Q.^1 ; Liu, Z.F.^1 ; Wang, X.H.^1 ; Zeng, B.^2

Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, Anhui

230026, China^1

Research Institute of Petroleum Exploration and Development-Langfang, Langfang, Hebei

065007, China^2

关键词: Discrete-fracture models;    Effective stimulation;    Equipment parameters;    Fracture propagation;    Fracture surfaces;    Fracturing process;    Generalized J-integral;    Numerical results;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/39/1/012034/pdf
DOI  :  10.1088/1755-1315/39/1/012034

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The hydraulic fracturing technique is an effective stimulation for low permeability reservoirs. In fracturing models, one key point is to accurately calculate the flux across the fracture surface and the stress intensity factor. To achieve high precision, the discrete fracture model is recommended to calculate the flux. Using the generalized J integral, the present work obtains an accurate simulation of the stress intensity factor. Based on the above factors, an alternative hydraulic fracturing model is presented. Examples are included to demonstrate the reliability of the proposed model and its ability to model the fracture propagation. Subsequently, the model is used to describe the relationship between the geometry of the fracture and the fracturing equipment parameters. The numerical results indicate that the working pressure and the pump power will significantly influence the fracturing process.