表面活性剂HD驱油体系性能研究

摘要

在表面活性剂提高采收率原理基础上,对HD界面特性及岩心驱油实验进行了研究.结果表明,在一定条件下,HD浓度在0.025％～0.30％的较宽范围内均可使矿化度为6 823 mg/L的油田污水形成10-3 mN/m数量级的超低界面张力.同时,加入适量添加剂HDSY,使达到最低界面张力的时间缩短(原来40 min,现为15 min)到原来的63.5％,且效果均优越于单一HD体系.复合体系驱替实验结果表明,在水驱含水达95％以后,还可继续提高原油采收率24.25％.%On the base of surfactant enhanced oil recovery,the HD interface characteristics and core flooding experiments were studied. The results showed that HD can make ultra-low interfacial tension of water and oil under concentrations from 0.025% to 0.30% in the salinity of 6 823 mg/L. The lowest interfacial tension of the time (the original 40 min, first for 15 min) is the 63.5% of original,and the results were superior to a single by additive HDSY. It showed that the water flooding after water up to 95% can continue to improve oil recovery 24.25% by composite flooding system.