石油钻采工艺2017，Vol.39Issue(5)：547-551,5.DOI:10.13639/j.odpt.2017.05.003
特高含水期油膜变形机理及微观物模实验验证
Oil film deformation mechanism in the stage of ultra-high water cut and its microscopic physical experiment verification
摘要
Abstract
To research the deformation situations of remaining oil film in the stage of ultra-high water cut, the deformation of oil film was investigated by means of the infinitesimal method based on the assumption that the oil film is displaced layer by layer. Accord-ingly, the main factors affecting the deformation of oil film were determined. Then, the change process of remaining oil film from the quiescent state to the critical fracturing was analyzed. Finally, the startup waterflood velocity of oil film deformation and the surface area/volume ratio of oil film while its deformation reaches the critical state were theoretically derived, and the rationality of the assumption was verified by means of microscopic physical simulation experiment. It is indicated that the oil film is displaced layer by layer. As the waterflood goes, the upper oil film is separated gradually from the main body, so the oil film gets thinner gradually. It is demonstrated that the oil film can be deformed and even fractured by altering the viscosity of water and the interfacial tension of oil film, so as to improve the recovery factor.关键词
特高含水期/剩余油/亲水毛细管/剩余油膜/变形机理Key words
ultra-high water cut stage/remaining oil/hydrophilic capillary/remaining oil film/deformation mechanism分类
能源科技引用本文复制引用
孟小海,陈琳,刘浩瀚,李奋..特高含水期油膜变形机理及微观物模实验验证[J].石油钻采工艺,2017,39(5):547-551,5.基金项目
国家科技重大专项重点项目"胜利油田特高含水期提高采收率技术"(二期)(编号:2016ZX05011) （二期）
中国石化股份胜利油田分公司项目"特高含水期微观剩余油动用机制研究"(编号:YKY1501) （编号:YKY1501）
四川省教育厅一般项目(编号:15ZB0447). （编号:15ZB0447）
