纳米膜材料在井下油水分离中的研究  

Research on Nano Membrane Materials in Downhole Oil-Water Separation

作　　者：王瑶 刘敏 张成富 郭沛文 王胜 詹敏 王洪 WANG Yao;LIU Min;ZHANG Cheng-fu;GUO Pei-wen;WANG Sheng;ZHAN Min;WANG Hong(CNOOC EnerTech-Drilling&Production Company,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：《当代化工》2021年第6期1468-1472,1478,共6页Contemporary Chemical Industry

基　　金：中海油能源发展股份有限公司科研项目,油田产出液紧凑高效处理技术开发集装备研制(项目编号:HFKJ-GJ2018-15)。

摘　　要：近年来,由于油井产出水逐年增多,举升、处理及环保等问题日益严重,为了解决上述问题,技术人员开发出井下油水分离技术。虽然机械旋流分离的方式可实现回注水含油率指标1 000μg·g^(-1),但在恶劣工况下可能达到3 000μg·g^(-1),不能满足回注水指标要求。研究发现,基于特殊润湿性材料对油和水的选择性作用,制造出亲水膜和亲油膜材料,通过控制表面的形貌结构和化学性质来调控表面润湿性,实现油和水的分离。通过研究,利用泡沫镍疏水改性成功制备出超亲油疏水材料,通过室内实验与数值模拟,分离效果和机械性能满足井下环境要求。采用井下机械旋流分离与超亲水、疏水材料相结合的井下纳米油水分离更大幅度地降低回注水中含油率,成为井下油水高效分离的新方向。In recent years, due to the increase of water output year by year, problems such as lifting, treatment and environmental protection have become increasingly serious. In order to solve the above problems, technicians have developed downhole oil-water separation technology. The oil content of reinjection water can reach 1 000 μg·g^(-1) by using mechanical cyclonic separation. However, it may reach 3 000 μg·g^(-1) in the worse working conditions, which means it cannot meet the reinjection water requirements. Research has found that based on the selective effect of special wettability materials on oil and water, hydrophilic membrane and oleophilic membrane materials have be produced, and the surface wettability can be controlled by controlling the surface morphology and chemical properties to realize the separation of oil and water. Through research, a super-lipophilic and hydrophobic material has successfully prepared by the hydrophobic modification of nickel foam. Through indoor experiments and numerical simulation, the separation effect and mechanical properties meet the requirements of the downhole environment. The downhole nano oil-water separation using downhole mechanical cyclone separation combined with super-hydrophilic and hydrophobic materials can greatly reduce the oil content in the reinjected water, so it will become a new direction for efficient downhole oil-water separation.

关 键 词：油水分离 节能减排 含油率 纳米膜 

分 类 号：TQ028.8[化学工程]