纳米颗粒调剖剂的制备、表征及其聚集封堵特性  

Preparation,characterization and aggregation plugging characteristic of nanoparticles profile control agent

作　　者：邵明鲁 左姜 常爱莲 孙天宇 张厚叶 浮历沛 SHAO Minglu;ZUO Jiang;CHANG Ailian;SUN Tianyu;ZHANG Houye;FU Lipei(School of Petroleum and Natural Gas Engineering,Changzhou 213164,China;School of Mechanical Engineering and Rail Transit,Changzhou 213164,China)

机构地区：[1]常州大学石油与天然气工程学院,江苏常州213164 [2]常州大学机械与轨道交通学院,江苏常州213164

出　　处：《常州大学学报（自然科学版）》2024年第3期26-33,共8页Journal of Changzhou University：Natural Science Edition

基　　金：江苏省自然科学青年基金资助项目(BK20220622);常州大学科研启动计划资助项目(ZMF21020383)。

摘　　要：研究提出了分散注入-原位聚集封堵的思路,以苯乙烯和丙烯酰胺为聚合单体,研制出一种表面含有酰胺基团且具有核壳非均质结构的纳米颗粒调剖剂,通过向油藏中注入粒径远小于油藏孔喉尺寸的纳米颗粒,将分散于地层水中的纳米颗粒移至油藏深部后,与预先注入到地层中的调控剂相接触,聚集成与水窜通道尺寸相匹配的颗粒簇,实现对水窜通道的封堵。制备的纳米颗粒热分解温度可达300℃以上,能够适用于高温油藏,并且纳米颗粒膨胀倍数小于2.0,可有效避免膨胀倍数过大导致的运移过程中剪切破碎的问题。封堵实验表明,纳米颗粒注入性良好,注入压力与注水时几乎无差别,纳米颗粒与预先注入的聚集调控剂混合后聚集成颗粒簇调剖剂,能够对岩芯孔喉进行有效封堵,在0.1μm 2岩芯中,纳米颗粒聚集堵率大于80%。The study proposed the idea of dispersed injection in-situ aggregation plugging,using styrene and acrylamide as polymerization monomers to develop nanoparticles profile control agent with a surface containing amide groups and a core-shell heterogeneous structure.By injecting nanoparticles with a particle size much smaller than the pore throat size into the reservoir,the dispersed nanoparticles in the formation water are moved to the deep part of the reservoir and come into contact with the regulator in the formation to aggregate into a particle cluster that matches the size of the water breakthrough channel,achieving the plugging of the water breakthrough channel.The thermal decomposition temperature of the prepared nanoparticles can reach more than 300℃,which can be suitable for high-temperature oil reservoirs.The expansion ratio of the nanoparticles is less than 2.0,which can effectively avoid the problem of shearing and breaking during the migration process due to the excessive expansion ratio.Core flooding experiments show that nanoparticles have good injectability and the injection pressure is almost the same as that of water injection.Nanoparticles can aggregate into particle clusters after mixing with aggregation regulators,which can effectively block the pore-throats of the core.When the permeability of core is 0.1μm 2,the plugging rate of nanoparticles is more than 80%.

关 键 词：深部调剖 纳米颗粒调剖剂 颗粒簇 封堵性能 

分 类 号：TE39[石油与天然气工程—油气田开发工程]