微波频率对聚合物驱油田采出水处理效果的影响规律研究

发布时间：2018-12-12 09:45

【摘要】：随着聚合物驱油技术在油田的广泛应用,聚合物驱油田采出水处理难度不断加大,采出水中的矿化度以及聚合物的含量对界面张力、油-水界面剪切黏度、油珠Zeta电位以及含油量等参数会有不同的影响,本文要运用微波技术对矿化度以及聚合物含量一定的采出水进行处理,而频率是微波的关键参数之一,对整个实验的研究具有指导意义,通过不同频率的微波处理聚合物驱油田采出水的实验研究,试图为聚合物驱油田采出水的处理提供新的可能性。本文实验所用样品为自行配制的模拟聚合物驱油田采出水,所需实验样品中具有一定的矿化度和含有一定量的聚合物,首先,通过实验得出不同矿化度、不同聚合物及聚合物浓度对油田采出水界面张力、油-水界面剪切黏度、油珠Zeta电位以及含油量的影响规律；其次,配制矿化度、聚合物含量一定的模拟聚合物驱油田采出水,用不同频率的微波对所配制样品分别进行不同时间的处理,并对处理后溶液的体相黏度、界面剪切黏度、Zeta电位值、除油率及聚合物的相对分子质量进行测定；再次,建立相关的数学模型对上述各参数的变化规律进行理论分析。实验结果和理论分析都表明：1、随着矿化度的升高,界面张力降低、界面剪切黏度无影响、Zeta电位绝对值增加、采出水中的含油量下降；2、随着聚合物浓度的增加,采出水的油水界面张力无变化、界面剪切黏度上升、油珠的Zeta电位绝对值增加；3、聚合物的相对分子质量的变化对界面张力没有特别明显的影响；4、当矿化度、聚合物种类及含量、含油量一定时,随着作用时间的增加,溶液的Zeta电位值以及除油率均呈上升趋势,而溶液的体相黏度、界面剪切黏度、聚合物相对分子量均呈下降趋势；5、不同频率对上述各参数的影响效果不同,但都产生了良好的作用效果。用不同频率的微波对聚合物驱油田采出水的处理效果具有良好的应用前景。
[Abstract]:With the extensive application of polymer flooding technology in oil fields, the difficulty of producing water treatment in polymer flooding field is increasing. The salinity of produced water and the content of polymer affect the interfacial tension, the shear viscosity of oil-water interface. The parameters such as Zeta potential and oil content of oil beads will have different effects. In this paper, we should use microwave technology to treat produced water with certain salinity and polymer content, and frequency is one of the key parameters of microwave. It is of great significance to study the whole experiment. Through the experimental study of treating the produced water of polymer flooding oilfield with microwave at different frequencies, this paper attempts to provide a new possibility for the treatment of produced water from polymer flooding oil field. The samples used in this paper are self-made simulated polymer flooding oilfield produced water. The experimental samples need to have certain degree of mineralization and a certain amount of polymer. First of all, different degrees of mineralization are obtained through experiments. The influence of polymer and polymer concentration on interfacial tension, shear viscosity of oil-water interface, Zeta potential of oil beads and oil content; Secondly, the simulated polymer flooding produced water with certain salinity and polymer content was prepared, the samples were treated with microwave at different frequencies for different time, and the bulk viscosity and interfacial shear viscosity of the treated solution were also studied. Zeta potential, oil removal rate and relative molecular weight of polymer were determined. Thirdly, the related mathematical model is established to analyze the change law of the above parameters. The experimental results and theoretical analysis show that: 1, with the increase of salinity, the interfacial tension decreases, the interfacial shear viscosity has no effect, the absolute value of Zeta potential increases, and the oil content in the produced water decreases; 2, with the increase of polymer concentration, the interfacial tension of oil and water in the produced water does not change, the interfacial shear viscosity increases, and the absolute value of Zeta potential of oil beads increases; 3. The change of relative molecular weight of polymer has no obvious effect on interfacial tension. 4. When the salinity, polymer type and content, oil content are constant, the Zeta potential value and oil removal rate of the solution increase with the increase of action time, while the bulk viscosity and interfacial shear viscosity of the solution are increased. The relative molecular weight of polymer showed a decreasing trend. 5. The effects of different frequencies on the above parameters are different, but they all have good effects. The treatment effect of polymer flooding produced water by microwave with different frequency has a good application prospect.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X741

【共引文献】