石油科学通报2025，Vol.10Issue(6)：1215-1227,13.DOI:10.3969/j.issn.2096-1693.2025.03.026
非稳态注水提采机制及注采参数差异化确定方法
Unsteady water injection extraction mechanism and differentiated determination method of injection and production parameters
摘要
Abstract
With the promotion of the strategy of reducing costs and increasing efficiency in oilfields,unsteady water injection has gradually become a key technology to improve the development effect of water flooding.In order to solve the problems of unclear mechanism and unclear injection-production parameters of unsteady water injection and production,the mechanism and mechanism of unsteady water injection and oil displacement were revealed through indoor visualization experiments,numerical simulation,seepage signal processing,seepage mechanics theory,etc.,the key factors of unsteady water injection reservoir screening were proposed,and a differentiated injection-production parameter determination method was constructed considering the heterogeneity of the reservoir.The results show that the unsteady water injection is mainly driven by the positive and negative pressure difference,supplemented by capillary force.Reservoir heterogeneity coefficient,water cut,and injection-production cy-cle are the main controlling factors affecting the development effect.Unsteady water injection should consider the heterogeneity of the reservoir and design differentiated injection-production parameters in order to play an effective role in oil flooding.The research results have been applied to typical low-permeability and high-water-cut reservoirs,and the development results have been very good,which proves the reliability of the method,and the method established in this study can provide theoretical and methodological support for the popularization of unsteady water injection technology.关键词
非稳态注水/正反压力差/毛管力/井间连通性/注采周期Key words
unsteady water injection/positive and negative pressure differences/capillary force/inter-well connectivity/Injection-production cycle分类
能源科技引用本文复制引用
ZHAO Xiaoliang,SUN Panke,JIANG Wuqiong,ZHANG Wei..非稳态注水提采机制及注采参数差异化确定方法[J].石油科学通报,2025,10(6):1215-1227,13.基金项目
国家自然科学基金:微观尺度页岩油启动力学机制(52474060)资助 （52474060）
