冷指实验研究碳酸钡结垢规律

污垢中的主要成分是碳酸钙,还有碳酸钡、硫酸钡、镁盐、硫酸锶等。国内外学者对碳酸钙结垢规律的研究很多,对碳酸钡的研究相对较少一些。通过冷指实验,控制离子浓度、反应温度、pH值、反应时间和搅拌速度以及溶液的过饱和度,以研究这些参数对碳酸钡结垢的影响。结果表明,碳酸钡垢的生长速率随着温度的增加而增加,随着流速的增加而减小,pH为9时最小,浓度对其生长速率的影响不甚明显。利用冷指实验研究碳酸钡结垢规律是一种较新的方法,其研究成果为油田除垢防垢提供一定的理论依据。

Research on Rule of Barium Carbonate Scaling by Cold Finger Experiment

The main component of scale is calcium carbonate, the rest of which includes barium carbonate, barium sulfate, magnesium salt, strontium sulfate and so on. Many researchers at home and abroad have studied the rules of calcium carbonate scaling, less on barium carbonate scaling. In this paper, through controlling ion concentration, reaction temperature, pH value, reaction time, stirring rate and supersaturation of solution,effects of these parameters on barium carbonate scaling were investigated by cold finger experiment. The results show that the growth rate of barium carbonate scaling increases with the increasing of temperature, decreases with the increasing of flow rate, and is the slowest when the pH value is 9. However, ion concentration has little influence on the growth rate of barium carbonate scaling. The cold finger experiment to study the rules of barium carbonate scaling is a relative new method, the research results can provide theory basis for decaling and scale prevention of oil field.