渤海某低渗油田表面活性剂降压增注技术  

Depressurization and Injection Enhancement Technology of Surfactants in a Low Permeability Oil Field in Bohai Sea

作　　者：李晓亮 江安 苏延辉 LI Xiao-liang;JIANG An;SU Yan-hui(CNOOC Ener Tech-Drilling&Production Co.,Tianjin 300452,China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300452

出　　处：《化工管理》2021年第5期67-68,共2页Chemical Engineering Management

摘　　要：渤海某低渗油田注水开发过程中,整体呈现注水压力逐渐升高、视吸水指数下降的趋势。通过室内实验优选出一种表面活性剂降压增注体系(BHJ-08),与地层水配伍性良好,临界胶束浓度为0.04%,有较强的降低表面张力能力。当浓度不低于0.4%时,体系油水界面张力可达10-3 mN/m数量级。通过岩心驱替降压增注实验验证,体系浓度0.6%时降压效果超过30%,驱油效果增加17%。During the water injection development process of a low-permeability oil f ield in Bohai,the overall water injection pressure gradually increased and the apparent water absorption index decreased.Through laboratory experiments,a surfactant depressurization increasing injection system(BHJ-08)is selected,which has good compatibility with formation water,and has a critical micelle concentration of 0.04%,which has a strong ability to reduce surface tension.When the concentration is not less than 0.4%,the system oilwater interfacial tension can reach the order of 10-3 mN/m.Verif ication by core displacement experiments shows that when the system concentration is 0.6%,the pressure reduction effect exceeds 30%,and the oil displacement effect increases by 17%.

关 键 词：低渗 表面活性剂 降压增注 

分 类 号：TQ423[化学工程]