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一种阳离子双子表面活性剂压裂液的研究及应用 被引量:13

The Research and Application of Cationic Gemini Surfactant Fracturing Fluids
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摘要 以二乙醇基脂肪胺和1,4-二溴丁烷为主要原料合成了一种C22季铵盐型双子表面活性剂,研究了该新型阳离子表面活性剂压裂液(GY_VES)的流变特性及破胶性能。实验结果表明,该双子表面活性剂压裂液在低浓度下就可以形成较稳定的蠕虫状胶束结构,且在高温下具有良好的剪切稳定性,该压裂液在110℃下剪切120min依然保持较高的黏度,含1%NH4Cl的GY_VES压裂液在120℃的黏度可维持在30 mPa·s;在低于100℃,0.1rad/s角频率下测量其动态流变性能,测得的弹性模量大于损耗模量,表明其具有高弹性特性,并且表现出良好的支撑悬浮性能;极性大的溶剂比极性小的溶剂对流体黏度的影响小;同时该压裂液在遇到混合烃或地层水稀释时,能迅速破胶。现场实验结果表明,GY_VES压裂液比瓜胶压裂液施工后的日均产量提高近一倍,应用前景广阔。 A C22 Gemini surfactant used in fracturing was synthesized by dicthanolamine and 1,4-dibromobutane as the main materials.Rheology static test shows that viscosity of 20%fracturing fluids GY_VES can maintain 30 mPa·s at 1001 s^(-1),20℃. Rheology dynamic test shows that it has high elastic properties and good suspension stability at 0.1 rad/s,below 100℃.Polar solvent has weaker influence on viscosity than less polar solvent.GY_VES can be broken down quickly when it mix with hydrocarbon or formation water.Field test shows that Gemini fracturing fluids nearly double the daily output than guar gum fracturing fluid.
出处 《钻井液与完井液》 CAS 北大核心 2013年第6期64-67,96,共4页 Drilling Fluid & Completion Fluid
基金 国家自然科学基金项目"粘弹性表面活性剂用于油气增产压裂液的应用基础"(51174163) "热电纳米材料与高分子材料对清洁压裂液的协同增效机理研究"(51304159) 陕西省教育厅科研计划项目"稠油超稠油油藏复合波波动/化学协同提高采收率技术"(11JK0780)
关键词 压裂液 黏弹性表面活性剂 双子表面活性剂 流变性 破胶 性能评价 Fracturing fluids Viscoelastic surfactant Gemini surfactant Rheology Gel breaking Performance evaluation
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