低渗油田增注复合剂降压增注室内实验  

Laboratory Experiment of Depressurizing and Increasing Injection Rate of Compound Agent Injection in Low Permeability Oilfields

作　　者：杨嫱[1] 武常茹 聂安琪 贺雪红 YANG Qiang;WU Chang-ru;NIE An-qi;HE Xue-hong(Jingbian Oil Production Plant of Yanchang Oilfield Co.,Ltd.,Yulin 718500,China)

机构地区：[1]延长油田股份有限公司靖边采油厂,榆林718500

出　　处：《当代化工》2021年第2期312-315,共4页Contemporary Chemical Industry

基　　金：国家科技重大专项,化学驱提高采收率技术(项目编号:2016ZX05010-004)。

摘　　要：为提高低渗油田注水开发效果,利用室内岩心渗透率实验分析表面活性剂对油水相对渗透率的影响,进行岩心伤害实验模拟,分析加入表面活性剂后水驱过程油水相对渗透率变化特征。研究表明:实验选择的表面活性剂(0.3%SC+0.1%DYF-SH+0.05%DCN-2)对黏土稳定剂具有一定的抑制作用,会影响黏土稳定剂的防膨效果。岩心驱替实验中加入0.5%表面活性剂后,能有效提高岩心驱替过程最终采收率10%,降压率为48.2%,有效期为18 PV。In order to improve the effect of waterflooding in low permeability oilfields, the influence of surfactant on the relative permeability of oil and water was analyzed by the core permeability experiment in laboratory, and the core damage experiment simulation was carried out, and the change characteristics of the relative permeability of oil and water in the process of waterflooding were analyzed. The results showed that the surfactant(0.3% SC + 0.1% DYF-SH + 0.05% DCN-2) selected in the experiment had a certain inhibition effect on the clay stabilizer, which affected the anti-swelling effect of the clay stabilizer. After adding 0.5% surfactant in core displacement experiment, the final recovery rate of core displacement was increased by 10%, the pressure reduction rate was 48.2%, and the effective period was 18 PV.

关 键 词：低渗储层 地层酸化 油田注水 酸蚀实验 

分 类 号：TE357[石油与天然气工程—油气田开发工程]