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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
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摘要 为了研究特高含水期微观剩余油膜的变形情况,假设油膜是被逐层驱替的条件下,采用微元法对油膜变形进行了研究,确定了影响油膜变形的主要因素,分析了剩余油膜由静止到临界破裂的变化过程,在理论上推导出油膜变形启动水驱速度及油膜变形达到临界状态时油膜的表面积与体积的比值,并用微观物理模拟实验验证了假设的合理性。研究表明,油膜是被逐层驱替的,随着水驱进行上层油膜逐渐脱离主体使油膜逐渐变薄;可以通过改变水的黏度和油膜的界面张力来达到油膜变形乃至破裂的目的进而增加采收率。 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.Accordingly,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.
作者 孟小海 陈琳 刘浩瀚 李奋 MENG Xiaohai;CHEN Lin;LIU Haohan;LI Fen(Exploration and Development Research Institute, SINOPEC Shengli Oilfield Company, Dongying 257017, Shandong, China;School of Sciences, Southwest Petroleum University, Chengdu 610500, Sichuan, China;Information Engineering Department, Sichuan College of Architectural Technology, Deyang 618000, Sichuan, China)
出处 《石油钻采工艺》 CAS CSCD 北大核心 2017年第5期547-551,共5页 Oil Drilling & Production Technology
基金 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) 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) 四川省教育厅一般项目(编号:15ZB0447)
关键词 特高含水期 剩余油 亲水毛细管 剩余油膜 变形机理 ultra-high water cut stage remaining oil hydrophilic capillary remaining oil film deformation mechanism
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