石油学报 ›› 2007, Vol. 28 ›› Issue (2): 109-112.DOI: 10.7623/syxb200206022

• 油田开发 • 上一篇    下一篇

低渗透油藏自发渗吸驱油实验研究

李士奎1,2, 刘卫东3, 张海琴3, 萧汉敏3   

  1. 1. 中国科学院广州地球化学研究所, 广东广州, 510630;
    2. 大庆油田有限责任公司第五采油厂, 黑龙江大庆, 163453;
    3. 中国石油勘探开发研究院廊坊分院, 河北廊坊, 065007
  • 收稿日期:2006-03-26 修回日期:2006-05-10 出版日期:2007-03-25 发布日期:2010-05-21
  • 作者简介:李士奎,男,1966年11月生,1989年毕业于西北大学地质系,现为中国科学院广州地球化学研究所在读博士,主要从事油田开发科研与管理工作.E-mail:Lshikui@petrochina.com.cn
  • 基金资助:
    国家重点基础研究发展规划(973)项目(2005CB221304)资助.

Experimental study of spontaneous imbibition in low-permeability reservoir

Li Shikui1,2, Liu Weidong3, Zhang Haiqin3, Xiao Hanmin3   

  1. 1. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510630, China;
    2. The Fifth Oil Production Plant, Daqing Oilfield Limited Company, Daqing 163453, China;
    3. Langfang Branch of PetroChina Exploration and Development Research Institute, Langfang 065007, China
  • Received:2006-03-26 Revised:2006-05-10 Online:2007-03-25 Published:2010-05-21

摘要: 通过低渗透亲水岩心自发渗吸实验,探讨了低渗透油藏不同界面张力体系的渗吸驱油过程。研究结果表明,注入水渗吸体系因毛细管力较高、毛细管力与重力比值较大,其渗吸过程为毛细管力支配下的逆向渗吸。与注入水渗吸结果相比,化学剂溶液因降低油水界面张力,在孔隙介质中能使更多的原油参与渗流过程,使更多的剩余油变为可动油,提高了渗吸平衡时的原油采出程度,因而提高了低渗透油藏原油的采收率。

关键词: 低渗透油藏, 渗吸驱油实验, 界面张力, 毛细管力, 可动油, 原油采收率

Abstract: The spontaneous imbibition process of solution with different interfacial tension in low-permeability reservoir was investigated experimentally by low-permeability (about 0.004μm2) water-wet oil-saturated sandstone cores.The result showed that the fluid flow for the water-wet system is countercurrent at high capillary force. Especially in the presence of brine and high interfacial tension, the imbibition process was entirely governed by capillary force.The evaluation of the positive changes in recovery rate and ultimate recovery compared to the brine imbibition showed that the low interfacial tension made the residual oil more easily to flow and enhanced oil recovery of surfactant imbibition in low-permeability reservoirs.

Key words: low permeability reservoir, imbibition experiment, interfacial tension, capillary force, mobile oil, oil recovery

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