三元采出液中磺基甜菜碱分析方法研究

发布时间：2018-05-13 21:30

本文选题：磺基甜菜碱 + 三元采出液　；参考：《东北石油大学》2017年硕士论文

【摘要】：磺基甜菜碱作为三元复合驱油剂中的表面活性剂,由于其优良的性能,已经越来越受到人们重视[1]。为了监测、评价开发效果、储层运用情况、为下一步的跟踪调整提供有效依据,同时检测油田污水化学剂残留,为污水处理提供检测方法,需要建立一套科学、完整的三元采出液中驱油剂浓度的检测方法。国内外对于检测聚合物和碱的方法研究的较为透彻,但对三元采出液中磺基甜菜碱的定量分析方法,鲜有报道。本文研究了三种检测采出液中I型磺基甜菜碱的定量分析方法:紫外分光光度法、液相色谱质谱联用法、液相色谱蒸发光散射联用法。本研究采用向采出液中加入乙醇使油水乳状液破乳、使聚合物沉淀的预处理方法,并基于紫外分光光度法建立了?A法:通过在I型磺基甜菜碱特征吸收峰起点(274nm处)到峰终点(281nm处)做连线,求得波长为277nm处峰值与连线之间差值?A的方法,消除了经醇法处理后样品中的残余油、残余的聚丙烯酰胺、固体悬浮物等不确定因素的影响,得到了磺基甜菜碱浓度与?A之间线性关系。使用建立的?A法进行现场采出液的加标回收率实验,以验证方法的准确性。本研究建立了液相色谱-质谱法和液相色谱-蒸发光散射法,同样采用醇法破乳和使聚合物沉淀的预处理方法。在液相色谱参数选取中,固定相选用Waters BEH C18色谱柱,流动相为水和甲醇的条件下,考察了甲醇中甲酸含量对检测器灵敏度的影响。对检测器参数的优化中,以峰型最好、分离度最高为原则,对仪器设备参数进行了优选。基于以上优化,分别研究了室内定量分析I型磺基甜菜碱的每种检测器响应随样品浓度变化的关系,拟合出磺基甜菜碱浓度与检测器响应之间的关系。并且对现场采出液进行样品的加标回收率实验以验证方法的准确性与稳定性。结果表明,三种方法稳定性与准确性都可满足现场应用要求。
[Abstract]:As a surfactant in ASP flooding, sulfobetaine has attracted more and more attention due to its excellent properties. In order to monitor, evaluate the development effect, reservoir application, provide effective basis for the next step of tracking and adjustment, at the same time detect the residue of oilfield sewage chemical agent, and provide the detection method for sewage treatment, it is necessary to establish a set of science. A complete method for detecting the concentration of oil displacement agent in ternary recovery liquid. The methods for the detection of polymer and alkali have been studied thoroughly at home and abroad, but the quantitative analysis method of sulfobetaine in ternary extraction solution is seldom reported. In this paper, three methods for quantitative analysis of type I sulfobetaine in extracted liquid were studied: ultraviolet spectrophotometry, liquid chromatography-mass spectrometry and evaporative light scattering method of liquid chromatography. In this study, the pretreatment method of oil / water emulsion demulsification and polymer precipitation was adopted. On the basis of ultraviolet spectrophotometry, a method was established: the line was made from the starting point of the characteristic absorption peak of type I sulfobetaine at 274nm to the terminal point of 281nm), and the difference between the peak value and the line at the wavelength of 277nm was obtained. The influence of the uncertain factors such as residual oil, residual polyacrylamide and solid suspended substance in the sample treated by alcohol method was eliminated, and the linear relationship between the concentration of sulfobetaine and TIA was obtained. In order to verify the accuracy of the method, the method was used to test the recovery rate of the extracted liquid in situ. Liquid chromatography-mass spectrometry (LC-MS) and liquid-chromatography-evaporative light scattering (LLS) were established in this study. The pretreatment methods of alcohol demulsification and polymer precipitation were also used. The influence of formic acid content in methanol on the sensitivity of detector was investigated under the conditions of Waters BEH C18 column and mobile phase of water and methanol in the selection of liquid chromatographic parameters. In the optimization of detector parameters, the peak type is the best and the separation degree is the highest. Based on the above optimization, the relationship between the response of each detector of type I sulfobetaine with the concentration of the sample was studied in laboratory, and the relationship between the concentration of sulfobetaine and the response of the detector was fitted. In order to verify the accuracy and stability of the method, the standard recovery rate of the sample was tested. The results show that the stability and accuracy of the three methods can meet the requirements of field application.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O657;X832

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