碱水驱油中界面张力的影响因素  

FACTORS EFFECTING INTERFACIAL TENSION IN ALKALINE FLOODING

作　　者：王红庄[1] 杨普华[1] 朱怀江[1] 

机构地区：[1]中国石油天然气总公司石油勘探开发科学研究院,北京市910信箱采收率所100083

出　　处：《油田化学》1997年第1期62-65,共4页Oilfield Chemistry

摘　　要：用旋转滴法研究了离子强度、pH值、阴离子和原油组分对碱水/原油界面张力最低值和平衡值的影响,考察了原油在长期老化后界面性质的变化。研究结果表明,碱液离子强度和pH值只有处于最佳组合条件,才能产生最低的界面张力,阴离子对界面张力的影响不大,原油经老化后与碱液间的界面张力降低。The effects of the ionic strength (I), pH value, and anions in aqueous alkaline solutions and of crude oil components upon the interracial tension (IFT) between an alkaline solution and an acidic crude oil are investigated. It is shown that: (1) for crude of acid value 2.47mg KOH/g from Jinzhou Block 16, Liaohe, utralow IFTs are obscrved when both I and pH values arc appropriate; (2) for the same crude, anions (CO_3^(2-), SiO_3^(2-), SO_4^(2-), OH^-, and HCO_3^-) have practically no influence upon the oil/alkaline IFTs, both minimum and equilibrium values; (3) the minimum IFTs are determined mainly by resins in crude and the equilibrium IFTs-by aromatics and asphaltenc; (4) long term aging of a crude oil results in enhancing its interracial activity. Some meaninful conclusive remarks are made.

关 键 词：碱水溶液 碱驱 原油界面张力 化学驱油 石油 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]