50
电
石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
纳米KH550-C18/Si0z
2016
复合粒子稠油降黏剂的制备及应用性能
张开亮姜仁龙？张宏民张长桥于萍
1.山东大学化学与化工学院2.山东省质量技术监督局机关服务中心
摘要通过硅烷偶联剂KH550和十八酸对纳米SiO2进行复合疏水改性，制备了一种新型纳米 KH550-C18/SiO：复合粒子降黏剂。采用红外光谱（FT-IR）热重分析（TG）透射电镜（TEM）、扫描量热分析(DSC)等手段对改性后纳米SiO2粒子的结构和性质进行分析表征。将其应用于大庆高蜡稠油进行降黏性能测试,研究了改性剂用量配比和降黏剂加入量对降黏效果的影响。结果表明，复合改性后，颗粒团聚程度减轻，在有机介质中能均匀稳定分散；纳米KH550-C18/Si02复合粒子表面由于接枝了含有极性基团的有机长链，能同时起到改善蜡质结晶行为和抑制胶质、沥青质形成大尺寸聚集体的作用：在最佳合成条件和最佳加入量时，该降黏剂在40℃的表观降黏率和净降黏率分别达66.91%和 40.32%，优于市售EVA降黏剂，
关键词稠油降黏剂蜡晶成核剂纳米二氧化硅表面改性
中图分类号：TE39
文献标志码：A
D0I：10.3969/i.issn.1007-3426.2016.06.011
Preparationand applicationproperty of viscosity reducerwith nano-sized
KH550-C18/SiO2compositeparticlesforheavyoil
Zhang Kailiang',Jiang Renlong,Zhang Hongmin',Zhang Changqiao',Yu Ping(l. School of Chemistry and Chemical Engineering , Shandong University + Jinan 25006l, China)
(2.Shandong Ouality and Technology Superuision Bureau, Jinan 250002, China)
Abstract: A novel nano-silica composite particle viscosity reducer for heavy oil was prepared by modifying the surface of nano-silica with silane couping agent KH550 and stearic acid. The structure and property of modified nano-silica particles were characterized and analyzed by FTIR , TG, TEM and DSC. Its viscosity reducing effect for high-wax heavy oil in Daqing oilfield was studied , and the effects on viscosity reducing were investigated by the ratio of modifier and dosage of viscosity reducer After surface modification , the nano-silica composite particles were low agglomerated and could be dispersed in organic medium stably . Because the nano-sized KH550-C18/SiO: composite particles were surface grafted with organic long chain containing polar group, they could change waxs crystallization behavior and prevent colloid and asphaltene forming large-sized aggregate. Under the optimal synthesis conditions and the best addition, its apparent viscosity reducing ratio and pure viscosity reducing ratio reached 66.91% and 40.32% respectively at 40 ℃ , which is better than the commercial viscosity reducer EVA -
Key words : heavy oil , viscosity reducer , wax crystal, nucleating agent, nano-silica, surface modi. fication
基金项目：国家重点基础研究发展计划(973计划)资助项目(2008CB617508）。
作者简令张邢亮(1989一），山东大学化学与化工学院研究生，主要从事稠油降黏剂和降凝剂的合成与应用工作。E-mail： sduzhangk@教m