复合体系与原油接触时间对界面张力的影响  

EFFECT OF CONTACT TIME ON THE INTERFACIAL TENSION OF ALKALI/SURFACTANTS/CRUDE OIL SYSTEMS

作　　者：刘立伟[1] 侯吉瑞[1] 岳湘安[1] 于龙岩[1] 秦艳臣[2] 

机构地区：[1]中国石油大学石油工程教育部重点实验室 [2]大庆油田第七采油厂

出　　处：《钻采工艺》2007年第6期113-115,共3页Drilling & Production Technology

摘　　要：研究了接触时间对NaCl/碱/重烷基苯磺酸盐/大庆原油体系界面张力的影响。结果表明,随着接触时间的延长,体系界面张力最低值上升,当接触时间由20min延长到1440min时,界面张力最低值由1.736×10-3mN/m上升为4.3220×10-2mN/m,并且曲线具有一定规律性;界面张力平衡值随着接触时间的延长缓慢上升,在120min前基本保持不变,在120min后上升为0.01mN/m以上,并平稳上升。同时,验证了在碱浓度很低的情况下(NaOH0.3%wt)加入一定量的NaCl,界面张力最小值和平衡值都可以达到超低(10-2mN/m)。The effect of contact time on the interfacial tension of alkali/surfactants/crude oil system was studied.The results of the experiment indicate that the value of the minimum IFT rise with the increase of the contact time.When the contact time extend from 20 minutes to 1440 minutes,the minimum IFT will rise from 1.736×10-3mN/m to 4.3220×10-2mN/m,the curve between IFT and contact time is regular.The equilibrium value of IFT increase smoothly with the extension of contact time,it is a constant during the first 120 minutes,and will past 0.01 mN/m and keep increasing smoothly after the 120 minutes.At the same time,adding a certain quantity of NaCl into the system when the concentration of Alkali is low(NaOH,0.3% wt)will make the minimum and equilibrium value of IFT reach the 10-3mN/m.

关 键 词：接触时间 重烷基苯磺酸盐 碱 离子强度 界面张力 大庆原油 

分 类 号：TE39[石油与天然气工程—油气田开发工程]