低频波激励下泡沫强化起泡特征  

Enhanced foam generation using low frequency vibration waves

作　　者：刘静[1,2] 夏军勇[3] 刘玺 吴飞鹏 李正斌[1,2] LIU Jing;XIA Junyong;LIU Xi;WU Feipeng;LI Zhengbin(School of Petroleum Engineering in China University of Petroleum(East China),Qingdao 266580,China;Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China)),Qingdao 266580,China;Daqing Oilfield Production Technology Institute,Daqing 163453,China;Zhidan Oil Production Plant,Shaanxi Yanchang Petroleum(Group)Company Limited,Yan an 717500,China)

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]非常规油气开发教育部重点实验室(中国石油大学(华东)),山东青岛266580 [3]大庆油田采油工程研究院,黑龙江大庆163453 [4]陕西延长油田股份有限公司志丹采油厂,陕西延安717500

出　　处：《中国石油大学学报（自然科学版）》2021年第5期113-120,共8页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(51904320,51874339);中央高校基本科研业务费专项(18CX02095A)。

摘　　要：为探究低频波对泡沫起泡性能的影响机制,利用毛细管和多孔介质玻璃刻蚀模型,开展低频波激励下泡沫起泡性能表征试验并对协同强化起泡机制进行探讨。结果表明:低频波激励下可缩短起泡时间、提高泡沫液利用率和气泡数目提高倍数;毛细管静态起泡时间缩短高达42%,其对应最佳频率和加速度分别为15 Hz和0.5 g(g为重力加速度);多孔介质动态起泡泡沫液利用率和气泡数目提高倍数分别比不加振动时提高了16.33%和5.59倍,其对应的最佳频率和加速度分别为25 Hz和0.3 g。揭示了低频波可通过降低泡沫液膜垂直方向上的拖拽力、增加水平方向上的剪切力以及降低气泡发生缩颈分离和液膜截断时的临界压力,进而缩短了起泡时间、提高了起泡速率和效果。In order to explore the effect of low frequency vibration waves on enhanced foam generation,assisted foam generation experiments were conducted using capillary tube and etched porous media models with and without vibration.The experimental results show that applying low frequency waves can shorten the foaming time,improve the utilization ratio of foam agent and increase the number of foam bubbles.Under vibration frequency of 15 Hz and acceleration rate of 0.5 g(g is the gravity acceleration),the foam generation time can be reduced by 42%.Under frequency of 25 Hz and acceleration of 0.3 g,the utilization ratio of foam agent and the number of bubbles can be increased by 16.33%and 5.59 times,respectively,in comparison with that without vibration.Application of low frequency vibration waves can shorten foaming time and increase foaming rate,which can be attributed to decreasing the drag force in vertical direction of the foam film,increasing the shear force in horizontal direction and reducing the critical pressure of the snap-off and liquid membrane truncation.

关 键 词：低频波 强化起泡 毛细管 多孔介质 起泡机制 

分 类 号：TE357[石油与天然气工程—油气田开发工程]