油气地质与采收率2025，Vol.32Issue(5)：124-131,8.DOI:10.13673/j.pgre.202505021
黏弹性颗粒驱多相渗流路径动态演化规律
Dynamic evolution law of multiphase flow pathways in viscoelastic particle flooding
摘要
Abstract
To gain an in-depth understanding of the microscopic flow characteristics and residual oil migration during viscoelastic particle flooding,this study established a pore-scale numerical model for viscoelastic particle-water-oil three-phase flow based on digital core.By tracking the dynamic evolution of the oil and water distribution field and analyzing the spatial structure changes of flow paths,the characteristics and evolution laws of flow paths during viscoelastic particle flooding were systematically revealed.Simulation results indicate that compared with conventional water flooding,dynamically branching flow paths are formed in the porous medium due to the plugging effect on the pore channels or increasing the flow resistance of viscoelastic particles in the pore channels.The evolution of these flow paths exhibits three distinct stages:path reconstruction,where the number of flow paths rapidly decreases from 60 to 25;path optimization,where the standard deviation of the weight increases from 5.00 to 10.00,accompanied by a 22%reduction in residual oil volume fraction;and dynamic equilibrium,where the number of flow paths remains around 15,and the residual oil volume fraction further decreases from 0.26 to 0.13.Quantitative analysis further shows that the resistance regulation and pressure fluctuations during viscoelastic particle flooding prompt fluids to enter previously unmobilized regions,improving displacement efficiency.The volume fraction of mobilized zones increases to 0.50-0.70,and the overall oil recovery is increased by 35%compared to the end of water flooding.The research reveals the dynamic evolution characteristics of the flow path during the viscoelastic particle flooding and clarifies the relationship between its microscopic regulatory mechanism and the macroscopic oil recovery efficiency.关键词
黏弹性颗粒/多相流/渗流路径/驱油效率/多孔介质/封堵效应Key words
viscoelastic particle/multiphase flow/flow path/displacement efficiency/porous medium/plugging effect分类
能源科技引用本文复制引用
孟薇,王娜,于金彪,汪勇,胡慧芳,柴国亮,苏军伟,税波..黏弹性颗粒驱多相渗流路径动态演化规律[J].油气地质与采收率,2025,32(5):124-131,8.基金项目
中国石化十条龙项目"化学驱微观模拟方法研究"(P21036-1),中国石化股份公司项目"'3+2'提高采收率机理及驱油体系优化研究"(P24168). （P21036-1）
