甜菜碱型表面活性剂与粉煤灰稳定泡沫的协同机制  

Synergistic mechanism of betaine surfactant and fly ash stabilized foam

作　　者：葛际江[1] 刘子铭 李隆杰 王恩卫[3] GE Jijiang;LIU Ziming;LI Longjie;WANG Enwei(School of Petroleum Engineering in China University of Petroleum(East China),Qingdao 266580,China;Petroleum Engineering Technology Research Institute of Shengli Oilfield Company,SINOPEC,Dongying 257000,China;No.1 Oil Production Plant in PetroChina Xinjiang Oilfield Company,Karamay 834000,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]中国石化胜利油田分公司石油工程技术研究院,山东东营257000 [3]中国石油新疆油田公司采油一厂,新疆克拉玛依834000

出　　处：《中国石油大学学报（自然科学版）》2023年第3期122-131,共10页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：中石油重大科技项目(ZD2019-183-007)。

摘　　要：复配不同长度碳链羟磺基甜菜碱型表面活性剂作为起泡剂,以不同粒度粉煤灰颗粒作为稳泡剂,通过Waring搅拌法确定由0.4%起泡剂和1%中值粒径6.879μm粉煤灰共同组成耐温抗盐的起泡体系。使用浊度计和流变仪研究粉煤灰的悬浮性能和不同泡沫体系的表观黏度,使用表面张力仪和液滴形状分析仪测定体系的表面张力和界面黏弹性。结果表明:90℃条件下三相泡沫的起泡体积为275 mL,消泡半衰期为205 min;加入粉煤灰虽然使体系的表面张力略有增加,但显著提高了表面扩张模量;在同一观察时刻下三相泡沫具有比两相泡沫更低的非均匀系数和更小的中值粒径,由此延缓了液膜的排液和透气过程;两相泡沫所产生的残余阻力系数为36.23,三相泡沫的残余阻力系数高达112.53。Hydroxysulfobetaine surfactants with different length of carbon chain were used as foaming agent and fly ash particles with different particle sizes were used as foam stabilizer.The foaming system composed of 0.4%foaming agent and 1%fly ash with median particle size of 6.879μm was determined by Waring Blender mixing method.Turbidimeter and rheometer were used to study the suspension performance of fly ash and the viscosity of different foam systems.The surface tension and interfacial viscoelasticity of the system were obtained by K100 surface tension meter and droplet shape analyzer.It is found that the volume of the three-phase foam at 90℃is 275 mL,and the defoaming half-life is 205 min.Although the addition of fly ash slightly increases the surface tension of the system,it significantly improves the surface dilatational modulus.Under the same observation time,the three-phase foam has a lower coefficient of non-uniformity and a smaller median diameter than the pure surfactant foam,thereby reducing the liquid drainage and air permeability of the liquid membrane.The residual resistance coefficient of two-phase foam is 36.23,and the residual resistance coefficient of three-phase foam is as high as 112.53.

关 键 词：粉煤灰 三相泡沫 稳定机制 封堵性能 

分 类 号：TE357[石油与天然气工程—油气田开发工程]