纳米膜滤水技术在海上特低渗油田高效注水开发中的应用  

Nanomembrane water filtration application in efficient water injection development of offshore ultra-low permeability oilfield

作　　者：谢雄 穆连兵 杨勇 张琳 陈维华 赵迎涛 王德强 单奕 王维锋 XIE Xiong;MU Lianbing;YANG Yong;ZHANG Lin;CHEN Weihua;ZHAO Yingtao;WANG Deqiang;SHAN Yi;WANG Weifeng(CNOOC(China)Co.,Ltd.,Shenzhen Branch,Shenzhen Guangdong 518000,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518000

出　　处：《石油化工应用》2025年第2期76-79,共4页Petrochemical Industry Application

摘　　要：陆丰14-4油田是海上首个注水开发的特低渗油田,存在物性低、能量不足的问题,需要采用人工注水开发。海上油田受生产条件和经济性限制,通常选择海水作为注水水源,但海水存在大量的SO_(4)^(2-)和Ca^(2+),与地层水出现结垢等严重的配伍性问题。经研究,本项目创新性采用纳米膜过滤法剥离掉易结垢的二价化学离子,通过物理法改变海水化学成分。纳米膜过滤技术可以有效过滤掉直径在1 nm左右的离子组分,对二价离子具有很高的去除率,特别是对于SO_(4)^(2-)过滤率超过99.9%,彻底根除了注入水与地层水出现结垢的配伍性问题。处理后的海水达到注水水质标准,为陆丰14-4特低渗油田成功注水开发奠定基础,也为同类油田开发提供了经验与借鉴。Lufeng 14-4 oilfield is the first water injection development of ultra-low permeability oilfield at sea,which has the problems of low physical properties and insufficient energy.Therefore,artificial water injection development is needed.Due to production conditions and economic constraints,seawater is typically chosen as the water source for offshore oilfields.However,seawater contains large amounts of SO_(4)^(2-)and Ca^(2+),which can cause severe compatibility problems such as scaling with formation water.Research has shown that this project innovatively employs nanofiltration to remove divalent chemical ions prone to scaling,altering the chemical composition of seawater through physical methods.Nanofiltration technology can effectively filter out ion components with a diameter of around 1 nm,achieving high removal rates for divalent ions,especially over 99.9%for SO_(4)^(2-),completely eliminating the compatibility issues causing scaling between injected water and formation water.The treated seawater meets the quality standards for water injection,laying the foundation for the successful water injection development of Lufeng 14-4 ultra-low permeability oilfield and providing valuable experience and reference for similar oilfield developments.

关 键 词：特低渗 注水开发 配伍性 纳米膜 离子过滤 

分 类 号：TE357.61[石油与天然气工程—油气田开发工程]