第46卷第4期
石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
Fe3+对自转向酸用VES性能的影响
高翔”许永楠”孙世轩”王瑛邓森"
1.中国石油大庆油田有限责任公司第七采油厂2.中国石油大庆油田有限责任公司第三采油厂
3.中国石油煤层气有限责任公司
摘要针对Fe+会减VES自转向酸酸化效果的问题，基于三种VES自转向酸体系与Fe3+配伍性实验,运用流变性测试、HPLC-CLND、ICP和XPS等方法,进一步了解了Fe+与表面活性剂作用机理。实验结果表明，随着Fe+质量浓度增加，VES体系黏度呈先增后降趋势，反应越来越剧烈， Fe+和VES质量浓度大幅降低，且当Fe+质量浓度大于4000mg/L时，体系会出现非混相状态。 XPS结果表明，VES与[FeCl丁形成整合物沉淀，使体系黏度下降，酸化效果减弱。实验结果为VES 表面活性剂合成与复配优选提供了依据。
关键词酸化黏弹性表面活性剂自转向酸Fe+
中图分类号：TE357.2
文献标志码：A
DOI:10.3969/j.issn.1007-3426.2017.04.013
Impact of Fe3+ on the performance of VES used in self-diverting acid
GaoXiang,XuYongnan,SunShixuan,WangYing,Deng Sen
1. The 7th Oil Production Plant, PetroChina Daqing Oilfield Company, Daging, Heilongjiang, China; 2. The 3rd Oil Production Plant, PetroChina Daqing Oilfield Company, Daqing, Heilongjiang, China;
3. CNPC CMB Company, Taiyuan, Shanxi, China
Abstract: The Fe+ can weaken acidizing effect of VES self-diverting acid. This paper studied compatibility between Fes+ and three kinds of VES self-diverting acids and further studied action mechanism between Fe3+ and surface active agent by analysis of rheology , HPLC-CLND, ICP, and XPS . The results showed the viscosity of VES increased at first and decreased later with the increase of Fe+ concentration. The reaction was become stronger and stronger with the increase of Fe3+ concentration. When the concentration of Fe3+ was up to 4 ooo mg/L, the system became immiscible phase. XPS results showed that VES and [FeCl J formed chelate precipitates , which reduced the viscosity of the system and weakened the acidizing effect . The experimental results provide the basis for the synthesis and compound optimization of VES surfactants.
Key words : acidizing, viscoelastic surfactant, self-diverting acid, oilfield chemistry
VES表面活性剂的自转向酸酸液体系以其对地层伤害小、滤失少、易返排等优点，已在国内外油田得到较广泛应用1-9」。目前，应用最多的是两性离子和阳离子型VES。郑云川等[10-11]合成两性VES芥子酰胺
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丙基甜菜碱后,研究了Fe3+对VES性能的影响。结果表明，当Fe+质量浓度大于5000mg/L时，将对酸液表观黏度产生非常不利的影响。由于管道腐蚀、酸岩反应等产生的Fe+也不能忽视，Fe+的存在会大
作者简伞赢（1988一），男，助理工程师，2012毕业于长江大学化学专业，2015年毕业于中国石油大学（北京)油气田开发工程专业，获额互擎，现从事提高采收率与采油化学研究工作。E-mail.84238273@q-com