石油化工高等学校学报2025，Vol.38Issue(5)：39-47,9.DOI:10.12422/j.issn.1006-396X.2025.05.005
混合润湿毛细管渗吸采油前缘特征研究
Study on Imbibition Oil Recovery Front Characteristics of Mixed Wetting Capillary
摘要
Abstract
The characteristics and evolution of the imbibition front during spontaneous oil recovery in mixed wetting capillaries are critical for predicting imbibition efficiency in tight oil reservoirs with complex wettability.By establishing a spontaneous imbibition model under mixed wetting conditions,this study investigates the influence of spatially heterogeneous wettability distribution and the degree of mixed wettability on the spontaneous imbibition front distance and the interfacial deformation behavior.The critical condition for achieving efficient spontaneous imbibition in mixed wetting capillarie is identified.A higher water-wetting fraction results in smaller differences in the stabilized static suction front edge distance,achieving optimal oil recovery time more efficiently.Conversely,a larger cosine difference in contact angles between wet and dry sidewalls leads to greater disparities in this critical parameter.By combining simulation data with a fitting formula for static suction front edge distance variations,combined with analytical solutions for the front distance,we can quantitatively characterize the dynamic patterns of front distance changes and interfacial deformation characteristics in mixed-wetting capillary systems.These findings provide theoretical support for efficient and low-carbon development strategies in mixed-wet tight oil reservoirs.关键词
致密储层/混合润湿/静态渗吸/前缘距离/毛细管Key words
Tight oil/Mixed wetting/Spontaneous imbibition/Front distance/Capillary分类
能源科技引用本文复制引用
濮御,杨二龙,付世博..混合润湿毛细管渗吸采油前缘特征研究[J].石油化工高等学校学报,2025,38(5):39-47,9.基金项目
国家自然科学基金面上项目(52274037) （52274037）
黑龙江省青年科技人才托举工程资助项目(2024QNTJ002) （2024QNTJ002）
大庆市指导性科技计划项目(zd-2024-18). （zd-2024-18）
