原油乳状液粒径及稳定性影响因素研究  

Study on the influencing factors for the droplet size and stability of crude oil emulsions

作　　者：何黎 李华斌[1] 何刚 罗磊 Li He;Huabin Li;Gang He;Lei Luo(College of Energy Sources,Chengdu University of Technology,Chengdu,Sichuan 610059,China)

机构地区：[1]成都理工大学能源学院,四川成都610059

出　　处：《日用化学工业(中英文)》2025年第3期341-348,共8页China Surfactant Detergent & Cosmetics

摘　　要：乳状液性能受乳化剂种类、乳化剂浓度、含水率(油水体积比)及搅拌转速(剪切速率)等因素影响。文章采用乳状液析水率及沙德平均粒径为评估指标,探讨搅拌转速、含水率及二者共同作用对乳状液粒径及稳定性的影响。结果表明,YMX-1乳化体系在温度为50℃、含水率为50%时,搅拌转速从7000 r/min增至15000 r/min,沙德平均粒径从18.83μm降至14.54μm,析水率从72.00%减小至50.80%,表明随搅拌转速增加,乳状液粒径减小,稳定性增强;搅拌转速为7000 r/min时,含水率从40%增至70%时,沙德平均粒径从17.11μm增至27.65μm,析水率从58.50%增至86.29%,表明随含水率增加,乳状液粒径增大,稳定性减弱。对正交实验结果进行方差分析和回归分析,结果表明含水率对乳状液粒径及稳定性影响比搅拌转速更大;得到了沙德平均粒径(D)和稳定性评分(VF)关于含水率(X)和搅拌转速(Y)预测方程:D=16.55+2.85X-2.94Y-1.5XY+1.35X^(2)+1.73Y^(2)和VF=9.0-3.54X+1.55Y,矫正拟合度分别达到了0.8371和0.9479,为Y油田后续乳状液驱提高采收率提供理论基础。The properties of an emulsion are affected by several factors including emulsifier type,emulsifier concentration,water content(oil-water volume ratio)and stirring speed(shear rate).In this work,the effects of stirring speed,water content and their combined action on the droplet size and stability of the emulsion were investigated by using the water separation percent and the Sauter mean diameter of the emulsion as the evaluation indexes.The results showed that,for the YMX-1 emulsion system of a water content of 50%at 50℃,when the stirring speed was increased from 7000 r/min to 15000 r/min,the Sauter mean diameter would decrease from 18.83μm to 14.54μm,and the water separation percent decreased from 72.00%to 50.80%.It suggested that with the increase of stirring speed,the droplet size of emulsion decreased and the stability increased.In the case of a stirring speed at 7000 r/min,when the water content was increased from 40%to 70%,the Sauter mean diameter would increase from 17.11μm to 27.65μm,and the water separation percent increased from 58.50%to 86.29%.It suggested that with the increase of water content,the droplet size of the emulsion increased and the stability decreased.The results of variance analysis and regression analysis showed that,the water content had greater influence on the droplet size and stability of the emulsion than the stirring speed did.The prediction equations of Sauter mean diameter(D)and stability score(VF)for water content(X)and stirring speed(Y)were obtained:D=16.55+2.85X-2.94Y-1.5XY+1.35X^(2)+1.73Y^(2) and VF=9.0-3.54X+1.55Y,and the fitting degree reached 0.8371 and 0.9479,respectively,which could provide a theoretical basis for subsequent emulsion flooding to improve oil recovery in Y oilfield.

关 键 词：乳状液 粒径 稳定性 剪切作用 含水率 方差分析 回归分析 

分 类 号：TE357[石油与天然气工程—油气田开发工程]