东北石油大学学报2024，Vol.48Issue(1)：86-95,10.DOI:10.3969/j.issn.2095-4107.2024.01.008
致密油藏混合润湿对孔隙尺度渗吸的影响
Effect of mixed wettability of tight reservoirs on the pore scale imbibition law
摘要
Abstract
The imbibition predicated upon the capillary pressure,can effectively produce the oil and com-plement the formation energy.In order to explore the relationship between the mixed wetting percent-age and the imbibition recovery,as well as the imbibition law in the typical mixed wetting pore-throats,the pore scale imbibition numerical model is established based on phase field theory and Navier-Stokes e-quation.A series of numerical simulations of pore scale imbibition processes are conducted to analyze of the influence of different mixed wetting degrees on imbibition oil recovery.Results indicate that the im-bibition recovery of core with the mixed wetting of 10％is higher than that of pure water-wetting sys-tem.For the low mixed wetting percentage,the mixed wetting pore-throats are also the main channel for imbibition oil recovery,whose imbibition effect is the similar as that of the water-wetting channel.When the mixed wetting percentage exceeds 40％,the imbibition recovery is less than 10％,resulting in the poor imbibition effect.For the high mixed wetting percentage,the well-connected and contiguous water-wetting pore-throats become the main advantageous channel for imbibition,while the continuous oil wetting pore-throats hinder the fluid flow,inducing the cessation of the imbibition.The results eluci-date the imbibition mechanism and flow potential of mixed wetting degree and mixed wetting distribu-tion,which is of great significance for improving the recovery rate of tight oil reservoirs.关键词
致密油藏/混合润湿/孔隙尺度/毛细管压力/渗吸规律/采出程度Key words
tight oil reservoir/mixed wetting/pore scale/capillary pressure/imbibition law/oil recov-ery分类
能源科技引用本文复制引用
濮御,杨二龙,杜庆龙..致密油藏混合润湿对孔隙尺度渗吸的影响[J].东北石油大学学报,2024,48(1):86-95,10.基金项目
国家自然科学基金面上项目(52274037) （52274037）
中央支持地方高效改革发展资金人才培养项目(14011202101) （14011202101）
黑龙江省博士后科研启动基金项目(LBH-Q21012) （LBH-Q21012）
海南省科技专项(ZDYF2022SHFZ107) （ZDYF2022SHFZ107）
