摘要
为进一步降低酸化压裂改造过程中入井液体对油藏的伤害提高酸化效果,室内合成了一种基于两性表面活性剂的酸液起泡剂AEY,采用FTIR、1HNMR谱对酸液起泡剂结构进行了表征,Warning-blender搅拌法测试起泡剂在清水及酸液中的泡沫性能;利用纳米材料与表面活性剂的复配增效作用,在不增加酸液粘度的情况下制备一种低粘低阻纳米泡沫缓速酸.利用高速摄和透射扫描电镜对其结构进行观察,并对纳米材料增强酸液泡沫性能的机理研究.测试结果表明:20%盐酸+0.5%AEY,起泡高度为452 ml,半衰期为8.2 min;20%盐酸+0.5%AEY+1.0%纳米颗粒,起泡高度395 ml,半衰期26 min,这是由于纳米颗粒在泡沫表面形成了稳定的吸附层,从而增强了泡沫的稳定性.岩心腐蚀速率结果显示,与常规酸对比,静态反应速率下降5.4倍,动态反应速率下降16.9倍,动态反应速率常数为8.71×10^-6,反应级数m为0.636,频率因子K0为0.3627,活化能Ea为40.17 KJ·mol^-1,达到了均匀布酸,缓速增效的目的.
In order to further reduce the damage of the well fluid to the reservoir and improve the acidizing effect in the process of acidizing and fracturing,an acid foaming agent AEY based on amphoteric surface agent was synthesized indoors.FTIR and 1HNMR spectra were used to characterize the structure of the foaming agent.The Warning-blender foaming method was used to test the foaming properties of the foaming agent in clear water and acid solution.A low viscosity and low resistance nano foam retarding acid was prepared by synergistic effect of nano materials and surfactants without increasing the viscosity of the acid.Its structure was observed by high speed photography and transmission scanning electron microscopy,and the mechanism of enhancing the performance of acid liquid foam by nanomaterials is also studied.The test results show that the foaming height of 20%hydrochloric acid+0.5%AEY is 452 ml and the half-life is 8.2 minutes.The foaming height of 20%hydrochloric acid+0.5%AEY+1.0%nanoparticles is 395ml and the half-life is 26 minutes.This is because nanoparticles form a stable adsorption layer on the foam surface,thereby enhancing the stability of the foam.The results of core corrosion rate showed that compared with conventional acid,the static reaction rate decreased by 5.4 times,the dynamic reaction rate decreased by 16.9 times,the dynamic reaction rate constant was 8.71×10^-6,the reaction order m was 0.636,the frequency factor K0 was 0.3627,and the activation energy Ea was 40.17 KJ·mol^-1,which achieved the purpose of uniformly dispersing the acid and reducing the efficiency of the acid rock reaction.
作者
王建华
WANG Jian-hua(Headquarter of Xunyi Exploration and Development Project,Yanchang Oilfield Company Limited,Xunyi 711300,China)
出处
《西安文理学院学报（自然科学版）》
2020年第3期103-106,共4页
Journal of Xi’an University(Natural Science Edition)
关键词
发泡剂
纳米材料
稳泡
缓蚀
foaming agent
nanomaterials
foam stabilization
corrosion inhibition
