88
石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
微乳助排剂的研制及性能评价
陈曦郭丽梅”高静2
1.天津现代职业技术学院2.天津科技大学化工与材料学院
2017
摘要采用两性表面活性剂、双子表面活性剂和非离子表面活性剂作为主剂、添加助剂及油相，复配得到了具有低表面张力和低界面张力的微乳液，并对其粒径、热稳定性、改善水润湿性能力、与压裂液配伍性及返排提高率进行评价，得到了具有优异助排效果的微乳液体系。结果表明：该体系粒径分布约80nm，其表面张力平衡值约26.0mN/m，与煤油间界面张力最低可降至<0.1mN/m，可改善云母表面润湿性，与其接触角最高改善约70°，返排提高率最高达到了29.72%；微乳液具有一定的耐温性，且与压裂液、添加剂和破胶液配伍性良好。
关键词微乳液表面张力界面张力
润湿性返排提高率
中图分类号：TE357
文献标志码：A
DOI:10.3969/j.issn.1007-3426.2017.03.018
Preparationandperformanceevaluationof themicroemulsioncleanupadditive
Chen Xi',Guo Limei’,Gao Jing
1. Tianjin Modern Vocational Technology College, Tianjin, China; 2. Collegeof Chemical Engineering
and Materials Science, Tianjin University of Science & Technology, Tianjin, China
Abstract: Using amphoteric surfactant, gemini surfactant and non-ionic surfactant as the main agents, compounding different types of surfactants, additives and oil phases, microemulsion with low surface tension and interfacial tension has been synthesized. And the particle size, thermal stability, capacity of improving wettability, compatibility with fracturing fluid and the flowback rate were evaluated, finally the microemulsion system with excellent cleanup effect was obtained. The results indicate that the range of particle size is about 8o nm, its equilibrium value of surface tension is about 26. 0 mN/m, the interfacial tension between microemulsion and kerosene is below 0.1 mN/m, which could improve the wettability of mica surface and the contact angle is improved by about 7o°, so the flowback rate can be up to 29. 72%. The microemulsion has thermal resistance, and the compatibility with the fracturing fluid, additives and gel breaking liquid is good
Key words: microemulsion, surface tension, interfacial tension, wettability, flowback rate
在油气开采过程中，压裂是常规体积改造手段(。
在压裂过程中，由于毛细管力)、水锁效应3}、贾敏效应4等原因的存在，地层驱动压力不能将酸化、压裂等工作液完全排出地层，储层的含水饱和度将增加，油气
相渗透率将降低，导致储层油气采出量减小，工作液残液也会对地层造成伤害(5-10)，通常采用低伤害压裂液["]或者添加助剂方式提高返排效率[12]。采用两性表面活性剂、阳离子表面活性剂、非离子表面活性剂及
基金项目：国家科技重大专项“大型油气田及煤层气开发”(2011ZX05013)。
作者简介：陈曦（1984-)，女，讲师，硕士，从事环境化学相关教学及科研工作，E-mail；chenxi-1024@163.com 通信作者：郭丽梅，女，教授，从事油田化学品的合成及油田水处理研究工作。E-mail：glmeitustedu.cn
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