Study on the influence of horizontal stress difference coefficient on hydraulic fracturing fracture
ZHANG Zengbao
MENG Xianbo
HUANG Gun
ZHU Xiaoming
WANG Yong
LU YU
YUAN Yiping
FENG Jiansheng
Abstract：In order to analyze the effect of horizontal stress difference coefficient on hydraulic fracturing fracture formation,PFC2D software was used to simulate hydraulic fracturing.The parallel bond model was used to simulate uniaxial compression and Brazil splitting test for parameter calibration.The number of fracturing fractures generated under different conditions after a certain time step was calculated by using calibration parameters for simulation.The fractal dimension was calculated by binarization of hydraulic fracture images.The analysis results show that when the horizontal stress difference coefficient is large,the fracture direction is con-trolled by the maximum horizontal principal stress,and it is easier to form a single through crack,while when the horizontal stress difference coefficient is low,the control effect of the maximum principal stress is weakened,the range of micro-cracks will be ex-panded,and the hydraulic fracture complexity is relatively higher.
Keywords：numerical simulationhydraulic fracturingfracture morphologyhorizontal stress difference coefficientfractal dimension
Publication Date：2025-04-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 37-42 )