超低渗油田用表面活性剂性能评价与提高采收率机理  

Performance Evaluation of Surfactants Used in Ultra-low Permeability Oil Fields and Mechanism of Enhanced Oil Recovery Rate

作　　者：杨欢 杨杰友 刘宏 刘飞龙 陈秋 韩董梅 YANG Huan;YANG Jieyou;LIU Hong;LIU Feilong;CHEN Qiu;HAN Dongmei(The Fifth Oil Production Plant of Changqing Oilfield Branch of China Petroleum Corporation,Xi'an 710076,China)

机构地区：[1]中国石油股份有限公司长庆油田分公司第五采油厂,陕西西安710076

出　　处：《化学与粘合》2025年第2期131-135,218,共6页Chemistry and Adhesion

基　　金：国家自然科学基金面上项目“黄土高原新近纪红粘土碎屑锆石的时空分布特征及物源区指示意义”(编号:41372036)。

摘　　要：针对超低渗透油田,系统评价了表面活性剂的性能及其提高采收率的机理。通过界面张力评价、流变性能分析和吸附特性研究,发现随着表面活性剂质量分数(浓度)的增加,油-水界面张力显著降低,在1%浓度下降至低点12.3 m N·m^(-1)。流变性能分析显示,溶液黏度在高浓度范围内趋于平稳,达到低点1.13 m Pa·s。吸附特性研究表明,岩心样品的比表面积从3.5m^(2)·g^(-1)增加到6.6 m^(2)·g^(-1),孔隙度从12.1%增加到17.2%。动态驱油实验结果显示,表面活性剂质量分数为1%时,采收率达到63.9%。影响因素分析表明,适宜的温度(80℃)、低盐度环境和高渗透率的岩石条件均有助于提高采收率。现场应用试验验证了表面活性剂在实际油田条件下的驱油效果,浓度为1%的表面活性剂在6个月内采收率从50.1%增加到56.3%。The performance of surfactants and their mechanism for improving oil recovery rate in ultra-low permeability oil fields are systematically evaluated.Through interfacial tension evaluation,rheological property analysis and adsorption characteristics research,it is found that as the surfactant mass fraction increases,the oil-water interfacial tension decreases significantly,reaching the lowest point of 12.3 mN·m^(-1) at 1%concentration.The rheological property analysis shows that the solution’s viscosity is stable in the high concentration range and reaches the lowest point of 1.13 mPa·s.The adsorption characteristics study shows that the specific surface area of the core sample increases from 3.5 m^(2)·g^(-1) to 6.6 m^(2)·g^(-1),and the porosity increases from 12.1%to 17.2%.The results of dynamic oil displacement experiments show that when the surfactant mass fraction is 1%,the oil recovery rate reaches 63.9%.The analysis of influencing factors shows that moderate temperature(80℃),low salinity environment and high permeability rock conditions are conducive to improving oil recovery rate.The field application tests verify the oil displacement efficiency of surfactants under actual oil field conditions.The oil recovery rate of surfactants with a concentration of 1%increases from 50.1%to 56.3%within 6 months.

关 键 词：低渗油田 表面活性剂 吸附 驱油 采收率 

分 类 号：TQ028.4[化学工程] TE357.46[石油与天然气工程—油气田开发工程]