海上油田注水水质对储层伤害的模拟实验  

Simulation experiment study on reservoir damage caused by injection water quality in offshore oilfield

作　　者：刘文辉[1] 郑玉飞[1] LIU Wenhui;ZHENG Yufei(China Oilfield Services Limited,Tianjin 300450,China)

机构地区：[1]中海油田服务股份有限公司,天津300450

出　　处：《化工科技》2020年第2期42-45,共4页Science & Technology in Chemical Industry

基　　金：“十三五”国家科技重大专项“大型油气田及煤层气开发”(2016ZX05058-003);中海油科研项目“渤西油田注入水水质控制技术研究”(YSB15YF002)。

摘　　要：油田注入水悬浮物和含油超标,会引发悬浮物颗粒、油滴及沉淀物聚集,造成储层的伤害,导致注水井的注入压力逐渐升高,油田长期欠注,进而影响油田的开发效果。针对以上问题,利用岩心驱替实验考察了渤海油田注入水质对岩心渗透率的影响规律。结果表明,随着注入水中悬浮物含量及悬浮物粒径中值的增大,岩心渗透率逐渐降低,注入水对岩心的伤害性越强;注入水中油对岩心的伤害程度要远低于悬浮物;当油和悬浮物同时存在时,对岩心的伤害会产生叠加效应。The excessive suspended solids and oil content in injected water will lead to accumulation of suspended solid particles,oil droplets and sediments,which will result in reservoir damage,a gradual increase in injection pressure and long-term deficiencies in the oilfield,and then the production results will be affected.In view of the above problems,the effect of injected water quality on core permeability in Bohai oilfield was investigated by core displacement experiment.The results showed that with the increase in suspended solid content and medium particle size of suspended solids in the injected water,the permeability of core was gradually reduced,and the damage of injected water to core was stronger.The damage degree of oil in injection water to core was much lower than that of suspended solids.When oil and suspended solids were presented at the same time,the damage to core permeability would produce a superposition effect.

关 键 词：注水开发 悬浮物 油含量 粒径中值 岩心渗透率 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]