泡沫酸与石英反应动力学及缓速效果研究

Research on Reaction Kinetics and Mitigation Effect of Foamed Acid and Quartz

关键词:  石英  泡沫酸  反应速度  反应动力学  缓速效果

Key words:  quartz  foamed acid  reaction rate  reaction kinetics  mitigation effect

摘要:

介绍了泡沫酸与石英反应动力学的基本原理及试验方法,进行了泡沫酸与石英的反应动力学试验,得到了在20℃、泡沫质量为85%时,泡沫酸与石英的反应动力学方程,并提出了一种20℃时计算泡沫酸与石英反应速度的新方法。研究了泡沫酸的缓速效果,发现H+可以加快HF与石英的反应,对泡沫酸的缓速效果影响不明显。泡沫酸的缓速效果主要是因为泡沫酸较高的表观粘度及H+传质过程中路径的复杂化。对于砂岩油藏的酸化设计具有一定的指导作用。

Abstract:

Basic theory and experimental method of foamed acid reaction kinetics are presented in this paper.The experiment of foamed acid reaction kinetics is carried out under 20℃,in which the foam quality is 85%.A new method of calculatting reaction rate of foamed acid and quartz is advanced.Mitigation effect of foamed acid is also studied,and the result shows that H+ can speed up the reaction of HF and quartz,but it doesn’t affect mitigation effect of foamed acid apparently.The reason of mitigation affect are high viscosity of foamed acid and complex path in which H+ transported.This paper has guidance to acidizing design of sandstone reservoir.